/* roulang page: index */
:root {
  --color-bg: #0B1530;
  --color-bg-alt: #101E3C;
  --color-footer: #060D1F;
  --color-primary: #22D3EE;
  --color-primary-dark: #0EA5E9;
  --color-accent: #C8F04A;
  --color-text: #F1F5F9;
  --color-text-secondary: #94A3B8;
  --color-text-muted: #64748B;
  --border-color: rgba(255,255,255,0.08);
  --border-hover: rgba(34,211,238,0.4);
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-img: 12px;
  --radius-tag: 999px;
  --radius-icon: 12px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 48px rgba(34,211,238,0.12);
  --space-section: 96px;
  --space-section-mobile: 64px;
  --container-width: 1200px;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "DIN Alternate", "IBM Plex Sans", sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s, border-color 0.25s;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
  border: none;
  outline: none;
}

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: var(--space-section) 0;
  position: relative;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--color-text);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ===== Header & Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 21, 48, 0.78);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s, box-shadow 0.3s;
}

.site-header.scrolled {
  background: rgba(11, 21, 48, 0.92);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-icon);
  background: rgba(34, 211, 238, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(34, 211, 238, 0.25);
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.3px;
  white-space: nowrap;
}

.logo-text span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: 6px;
  position: relative;
  transition: color 0.25s;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-cta {
  min-width: 128px;
  height: 44px;
  padding: 0 24px;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
}

.nav-cta:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.4);
  transform: translateY(-1px);
}

.nav-cta:active {
  transform: scale(0.98);
}

.nav-cta:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.4);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: rgba(255,255,255,0.04);
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(11, 21, 48, 0.97);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  padding: 32px 24px 24px;
  overflow-y: auto;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 18px 12px;
  border-bottom: 1px solid var(--border-color);
  transition: color 0.25s, padding-left 0.25s;
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--color-primary);
  padding-left: 20px;
}

.mobile-menu .mobile-cta {
  margin-top: 32px;
  width: 100%;
  height: 52px;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.3);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: 140px;
  padding-bottom: 80px;
  background:
    radial-gradient(ellipse at 15% 20%, rgba(34, 211, 238, 0.16), transparent 50%),
    radial-gradient(ellipse at 85% 85%, rgba(14, 165, 233, 0.1), transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(255,255,255,0.04), transparent 60%),
    #0B1530;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.06);
  filter: blur(80px);
  top: 30%;
  right: -100px;
  animation: floatGlow 8s ease-in-out infinite;
}

@keyframes floatGlow {
  0%, 100% { opacity: 0.2; transform: translateY(0); }
  50% { opacity: 0.5; transform: translateY(-24px); }
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 2;
}

.hero-left {
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: var(--radius-tag);
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  color: var(--color-text);
  letter-spacing: -1px;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 440px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
  cursor: pointer;
}

.btn:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.4);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 32px rgba(34, 211, 238, 0.45);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.25);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.05);
}

.btn-secondary:active {
  transform: scale(0.98);
}

.hero-right {
  position: relative;
}

.hero-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s, border-color 0.3s;
  position: relative;
}

.hero-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 16px 48px rgba(34, 211, 238, 0.15);
}

.hero-card img {
  border-radius: 12px;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero-card-info {
  padding: 20px 20px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-card-info .card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.hero-card-info .card-status {
  font-size: 13px;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-card-info .card-status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 6px var(--color-accent);
}

.hero-card-metrics {
  display: flex;
  gap: 24px;
  padding: 16px 20px 20px;
  border-top: 1px solid var(--border-color);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-item .metric-value {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-accent);
}

.metric-item .metric-label {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-icon);
  background: rgba(34, 211, 238, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border: 1px solid rgba(34, 211, 238, 0.15);
  transition: background 0.3s;
}

.feature-card:hover .feature-icon {
  background: rgba(34, 211, 238, 0.18);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}

.feature-link {
  font-size: 14px;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.25s;
}

.feature-link:hover {
  gap: 10px;
}

.feature-link::after {
  content: "→";
  font-size: 16px;
}

/* ===== Demo Section ===== */
.demo-section {
  background: rgba(16, 30, 60, 0.4);
  position: relative;
  overflow: hidden;
}

.demo-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 60px;
}

.demo-block:last-child {
  margin-bottom: 0;
}

.demo-block.reverse .demo-image {
  order: 2;
}

.demo-block.reverse .demo-content {
  order: 1;
}

.demo-image {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.demo-image img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-card);
}

.demo-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11, 21, 48, 0.4));
  border-radius: var(--radius-card);
}

.demo-tags {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.demo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-tag);
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: border-color 0.3s, background 0.3s;
}

.demo-tag:hover {
  border-color: var(--border-hover);
  background: rgba(34, 211, 238, 0.06);
}

.demo-tag strong {
  font-family: var(--font-num);
  color: var(--color-accent);
  font-size: 16px;
}

.demo-content h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.demo-content .demo-label {
  font-size: 14px;
  color: var(--color-primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.demo-content p {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.demo-steps {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.demo-step {
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-step .step-num {
  font-family: var(--font-num);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 13px;
}

.demo-step-arrow {
  color: var(--color-primary);
  font-size: 18px;
  font-weight: 700;
}

/* ===== Proof Section ===== */
.proof-section {
  background: var(--color-bg-alt);
  position: relative;
}

.proof-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 56px;
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: var(--font-num);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.review-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: border-color 0.3s;
}

.review-card:hover {
  border-color: var(--border-hover);
}

.review-text {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 20px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(34,211,238,0.3), rgba(14,165,233,0.3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.review-meta {
  display: flex;
  flex-direction: column;
}

.review-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.review-role {
  font-size: 13px;
  color: var(--color-text-muted);
}

.review-stars {
  display: flex;
  gap: 2px;
  margin-top: 4px;
  color: var(--color-accent);
  font-size: 14px;
}

/* ===== Pricing ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.price-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.price-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.price-card.featured {
  background: rgba(34, 211, 238, 0.06);
  border: 2px solid rgba(34, 211, 238, 0.5);
  transform: scale(1.06);
  box-shadow: 0 16px 48px rgba(34, 211, 238, 0.12);
  z-index: 2;
}

.price-card.featured:hover {
  transform: scale(1.06) translateY(-4px);
}

.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #C8F04A, #A8D83A);
  color: #0B1B2B;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-tag);
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(200, 240, 74, 0.3);
}

.price-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.price-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.price-amount {
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 24px;
  line-height: 1.2;
}

.price-amount .price-unit {
  font-size: 16px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: 4px;
}

.price-features {
  margin-bottom: 32px;
  flex-grow: 1;
}

.price-features li {
  font-size: 15px;
  color: var(--color-text-secondary);
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.price-features li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.price-cta {
  width: 100%;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all 0.2s;
}

.price-cta-primary {
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
}

.price-cta-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.4);
}

.price-cta-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.25);
}

.price-cta-secondary:hover {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.05);
}

/* ===== FAQ ===== */
.faq-section .container {
  max-width: 860px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color 0.3s;
}

.faq-item.active {
  border-color: rgba(34, 211, 238, 0.35);
}

.faq-item.active .faq-question {
  border-left: 2px solid var(--color-primary);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  background: none;
  border: none;
  text-align: left;
  width: 100%;
  transition: background 0.3s;
  border-left: 2px solid transparent;
}

.faq-question:hover {
  background: rgba(255,255,255,0.03);
}

.faq-question:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.4);
  outline-offset: -2px;
}

.faq-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform 0.3s;
  font-weight: 400;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

/* ===== News Section ===== */
.news-section {
  background: var(--color-bg-alt);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.news-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.news-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(34, 211, 238, 0.1);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-tag);
  margin-bottom: 16px;
  align-self: flex-start;
}

.news-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
  line-height: 1.5;
}

.news-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.news-date {
  font-size: 13px;
  color: var(--color-text-muted);
  font-family: var(--font-num);
}

.news-link {
  font-size: 14px;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s;
}

.news-link:hover {
  gap: 8px;
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 32px;
  background: rgba(255,255,255,0.03);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-card);
}

.news-empty-icon {
  font-size: 40px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.news-empty p {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.news-empty span {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 96px 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(34, 211, 238, 0.2), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(14, 165, 233, 0.15), transparent 50%),
    linear-gradient(135deg, #0B1B2B, #101E3C);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cta-section p {
  font-size: 17px;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  padding: 0 40px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all 0.25s;
  cursor: pointer;
}

.cta-btn:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.4);
  outline-offset: 2px;
}

.cta-btn-primary {
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.35);
}

.cta-btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 40px rgba(34, 211, 238, 0.5);
  transform: translateY(-1px);
}

.cta-btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.3);
}

.cta-btn-secondary:hover {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.05);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-footer);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 260px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.25s, padding-left 0.25s;
}

.footer-col ul a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer-newsletter p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.newsletter-form {
  display: flex;
  gap: 8px;
}

.newsletter-form input {
  flex: 1;
  height: 44px;
  padding: 0 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-btn);
  color: var(--color-text);
  font-size: 14px;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.newsletter-form input::placeholder {
  color: var(--color-text-muted);
}

.newsletter-form input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
}

.newsletter-form button {
  height: 44px;
  padding: 0 20px;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  white-space: nowrap;
  transition: filter 0.2s, box-shadow 0.2s;
}

.newsletter-form button:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 16px rgba(34,211,238,0.3);
}

.newsletter-success {
  display: none;
  font-size: 14px;
  color: var(--color-accent);
  margin-top: 12px;
  align-items: center;
  gap: 6px;
}

.newsletter-success.show {
  display: flex;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== Floating CTA ===== */
.float-cta {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(34, 211, 238, 0.35), 0 0 0 1px rgba(34, 211, 238, 0.3);
  z-index: 900;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s, transform 0.3s, box-shadow 0.3s;
  pointer-events: none;
}

.float-cta.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.float-cta:hover {
  box-shadow: 0 6px 30px rgba(34, 211, 238, 0.5), 0 0 0 1px rgba(34, 211, 238, 0.4);
  transform: translateY(-2px);
}

.float-cta:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.4);
  outline-offset: 2px;
}

.float-cta svg {
  width: 24px;
  height: 24px;
  stroke: #0B1B2B;
  stroke-width: 2.2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 20px;
  }

  .hero {
    padding-top: 120px;
    padding-bottom: 60px;
  }

  .hero-left {
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-right {
    max-width: 560px;
    margin: 0 auto;
    width: 100%;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .demo-block,
  .demo-block.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .demo-block.reverse .demo-image {
    order: 1;
  }

  .demo-block.reverse .demo-content {
    order: 2;
  }

  .proof-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }

  .price-card.featured {
    transform: scale(1);
  }

  .price-card.featured:hover {
    transform: scale(1) translateY(-4px);
  }

  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 767px) {
  :root {
    --space-section: var(--space-section-mobile);
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-header h2 {
    font-size: 26px;
  }

  .hero {
    padding-top: 100px;
    padding-bottom: 48px;
    min-height: auto;
  }

  .hero h1 {
    font-size: 36px;
    line-height: 1.3;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .hero-card-info {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    padding: 24px 20px;
  }

  .demo-content h3 {
    font-size: 22px;
  }

  .demo-steps {
    flex-direction: column;
    align-items: stretch;
  }

  .demo-step-arrow {
    transform: rotate(90deg);
    text-align: center;
    padding: 4px 0;
  }

  .proof-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding: 32px 0;
  }

  .stat-number {
    font-size: 30px;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .cta-section {
    padding: 64px 0;
  }

  .cta-section h2 {
    font-size: 28px;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-form button {
    width: 100%;
  }

  .float-cta {
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  .mobile-menu {
    padding-bottom: 96px;
  }

  .mobile-menu .mobile-cta {
    margin-top: 24px;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .mobile-menu {
    padding-left: 32px;
    padding-right: 32px;
  }

  .mobile-menu a {
    font-size: 22px;
  }
}

@media (min-width: 1024px) {
  .mobile-menu {
    display: none !important;
  }
}

/* roulang page: category1 */
:root {
      --color-primary: #0B1B2B;
      --color-primary-light: #101E3C;
      --color-primary-dark: #060D1F;
      --color-bg: #0B1530;
      --color-accent: #22D3EE;
      --color-accent-2: #0EA5E9;
      --color-lime: #C8F04A;
      --color-card: rgba(255,255,255,0.06);
      --color-border: rgba(255,255,255,0.08);
      --color-border-hover: rgba(34,211,238,0.4);
      --color-text: #F1F5F9;
      --color-text-secondary: #94A3B8;
      --color-text-muted: #64748B;
      --color-error: #F87171;
      --radius-card: 16px;
      --radius-button: 8px;
      --radius-image: 12px;
      --radius-tag: 999px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
      --shadow-hover: 0 16px 48px rgba(34,211,238,0.12);
      --space-section: 96px;
      --space-mobile: 64px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
      --font-num: "DIN Alternate", "IBM Plex Sans", "Helvetica Neue", sans-serif;
    }
    *,
    *::before,
    *::after {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }
    body {
      font-family: var(--font-sans);
      background: var(--color-bg);
      color: var(--color-text);
      font-size: 16px;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      display: block;
      border-radius: var(--radius-image);
    }
    a {
      color: var(--color-accent);
      text-decoration: none;
      transition: color .2s ease;
    }
    a:hover {
      color: var(--color-accent);
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 3px;
    }
    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }
    input {
      font-family: inherit;
      border: none;
      outline: none;
    }
    ul {
      list-style: none;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* ============ HEADER ============ */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(11, 27, 43, 0.78);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: box-shadow .3s ease, background .3s ease;
    }
    .site-header.scrolled {
      background: rgba(9, 21, 36, 0.92);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
    }
    .nav-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      font-size: 20px;
      font-weight: 700;
      color: var(--color-text);
      letter-spacing: 0.02em;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(34, 211, 238, 0.12);
      border-radius: 10px;
      border: 1px solid rgba(34, 211, 238, 0.3);
    }
    .logo-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--color-text);
    }
    .logo-text span {
      color: var(--color-accent);
      font-weight: 600;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      flex: 1;
      justify-content: center;
    }
    .nav-links a {
      position: relative;
      padding: 10px 16px;
      color: var(--color-text-secondary);
      font-size: 15px;
      font-weight: 500;
      border-radius: 6px;
      transition: color .2s ease;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 4px;
      height: 2px;
      background: var(--color-accent);
      border-radius: 2px;
      transform: scaleX(0);
      transform-origin: center;
      transition: transform .25s ease;
    }
    .nav-links a:hover {
      color: var(--color-text);
    }
    .nav-links a:hover::after {
      transform: scaleX(1);
    }
    .nav-links a.active {
      color: var(--color-accent);
    }
    .nav-links a.active::after {
      transform: scaleX(1);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 128px;
      height: 44px;
      padding: 0 24px;
      background: linear-gradient(135deg, #22D3EE, #0EA5E9);
      color: #0B1B2B !important;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-button);
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
      transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
      flex-shrink: 0;
      border: none;
    }
    .nav-cta:hover {
      filter: brightness(1.1);
      box-shadow: 0 0 28px rgba(34, 211, 238, 0.4);
      transform: translateY(-1px);
      color: #0B1B2B !important;
    }
    .nav-cta:active {
      transform: scale(0.98);
    }
    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      background: rgba(255, 255, 255, 0.06);
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .nav-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--color-text);
      border-radius: 2px;
      transition: transform .3s ease, opacity .3s ease;
    }
    .nav-toggle.open span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle.open span:nth-child(2) {
      opacity: 0;
    }
    .nav-toggle.open span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* ============ MOBILE DRAWER ============ */
    .mobile-drawer {
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(7, 16, 30, 0.98);
      backdrop-filter: blur(20px);
      z-index: 999;
      display: flex;
      flex-direction: column;
      padding: 32px 24px 24px;
      transform: translateY(-24px);
      opacity: 0;
      pointer-events: none;
      transition: opacity .3s ease, transform .3s ease;
      overflow-y: auto;
    }
    .mobile-drawer.open {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }
    .mobile-drawer .drawer-links {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .mobile-drawer .drawer-links a {
      display: block;
      padding: 14px 16px;
      font-size: 17px;
      font-weight: 500;
      color: var(--color-text-secondary);
      border-radius: 10px;
      border: 1px solid transparent;
      transition: background .2s ease, color .2s ease;
    }
    .mobile-drawer .drawer-links a:hover {
      background: rgba(255, 255, 255, 0.04);
      color: var(--color-text);
    }
    .mobile-drawer .drawer-links a.active {
      color: var(--color-accent);
      background: rgba(34, 211, 238, 0.08);
      border-color: rgba(34, 211, 238, 0.2);
    }
    .mobile-drawer .drawer-cta {
      margin-top: 32px;
      display: flex;
    }
    .mobile-drawer .drawer-cta .btn-primary {
      width: 100%;
      height: 52px;
      font-size: 16px;
    }

    /* ============ BUTTONS ============ */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 32px;
      background: linear-gradient(135deg, #22D3EE, #0EA5E9);
      color: #0B1B2B;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-button);
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
      transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
      cursor: pointer;
      border: none;
    }
    .btn-primary:hover {
      filter: brightness(1.08);
      box-shadow: 0 0 32px rgba(34, 211, 238, 0.45);
      transform: translateY(-2px);
      color: #0B1B2B;
    }
    .btn-primary:active {
      transform: scale(0.98);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 32px;
      background: transparent;
      color: var(--color-text);
      font-size: 15px;
      font-weight: 500;
      border-radius: var(--radius-button);
      border: 1px solid rgba(255, 255, 255, 0.25);
      transition: border-color .2s ease, background .2s ease, transform .2s ease;
      cursor: pointer;
    }
    .btn-secondary:hover {
      border-color: var(--color-accent);
      background: rgba(255, 255, 255, 0.05);
      color: var(--color-text);
      transform: translateY(-2px);
    }
    .btn-secondary:active {
      transform: scale(0.98);
    }
    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--color-accent);
      font-size: 14px;
      font-weight: 500;
      border: none;
      background: none;
      cursor: pointer;
      padding: 4px 0;
    }
    .text-link .arrow {
      transition: transform .25s ease;
    }
    .text-link:hover .arrow {
      transform: translateX(4px);
    }

    /* ============ SECTIONS ============ */
    .section-space {
      padding: var(--space-section) 0;
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-head h2 {
      font-size: 32px;
      font-weight: 700;
      color: var(--color-text);
      letter-spacing: -0.01em;
      line-height: 1.3;
    }
    .section-head p {
      margin-top: 12px;
      font-size: 16px;
      color: var(--color-text-secondary);
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
    }
    @media (max-width: 767px) {
      .section-head h2 {
        font-size: 26px;
      }
      .section-head p {
        font-size: 15px;
      }
    }

    /* ============ CATEGORY HERO ============ */
    .cat-hero {
      position: relative;
      padding: 168px 0 96px;
      background: linear-gradient(135deg, #0B1B2B 0%, #0B1530 50%, #0D2140 100%);
      overflow: hidden;
    }
    .cat-hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      opacity: 0.3;
      z-index: 0;
    }
    .cat-hero::before {
      content: '';
      position: absolute;
      top: -80px;
      left: -80px;
      width: 380px;
      height: 380px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.18) 0%, transparent 70%);
      z-index: 1;
      animation: floatGlow 7s ease-in-out infinite alternate;
    }
    .cat-hero::after {
      content: '';
      position: absolute;
      bottom: -60px;
      right: -60px;
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(11, 165, 233, 0.15) 0%, transparent 70%);
      z-index: 1;
      animation: floatGlow 6s ease-in-out infinite alternate-reverse;
    }
    @keyframes floatGlow {
      0% {
        opacity: 0.3;
        transform: scale(0.95);
      }
      100% {
        opacity: 0.7;
        transform: scale(1.05);
      }
    }
    .cat-hero .container {
      position: relative;
      z-index: 2;
    }
    .cat-hero-content {
      max-width: 720px;
    }
    .cat-hero-content .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(34, 211, 238, 0.1);
      border: 1px solid rgba(34, 211, 238, 0.25);
      border-radius: var(--radius-tag);
      font-size: 13px;
      color: var(--color-accent);
      font-weight: 500;
      margin-bottom: 24px;
    }
    .cat-hero-content h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--color-text);
      letter-spacing: -0.02em;
    }
    .cat-hero-content h1 .highlight {
      background: linear-gradient(135deg, #22D3EE, #67E8F9);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .cat-hero-content .hero-desc {
      margin-top: 20px;
      font-size: 17px;
      color: var(--color-text-secondary);
      line-height: 1.8;
      max-width: 580px;
    }
    .cat-hero-actions {
      display: flex;
      gap: 16px;
      margin-top: 36px;
      flex-wrap: wrap;
    }
    .cat-hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 64px;
      max-width: 640px;
    }
    .hero-stat {
      padding: 20px 24px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-card);
      backdrop-filter: blur(10px);
    }
    .hero-stat .num {
      font-family: var(--font-num);
      font-size: 32px;
      font-weight: 700;
      color: var(--color-lime);
      line-height: 1.2;
    }
    .hero-stat .num span {
      font-size: 18px;
    }
    .hero-stat .label {
      margin-top: 4px;
      font-size: 14px;
      color: var(--color-text-secondary);
    }
    @media (max-width: 767px) {
      .cat-hero {
        padding: 136px 0 64px;
      }
      .cat-hero-content h1 {
        font-size: 36px;
      }
      .cat-hero-content .hero-desc {
        font-size: 15px;
      }
      .cat-hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        margin-top: 40px;
      }
      .hero-stat {
        padding: 16px;
      }
      .hero-stat .num {
        font-size: 26px;
      }
    }

    /* ============ CATEGORY INTRO ============ */
    .cat-intro {
      background: var(--color-primary-light);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      padding: var(--space-section) 0;
      position: relative;
      overflow: hidden;
    }
    .cat-intro::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.3), transparent);
    }
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .intro-media {
      position: relative;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .intro-media img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      border-radius: var(--radius-card);
    }
    .intro-media::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 60%, rgba(11, 27, 43, 0.5) 100%);
      border-radius: var(--radius-card);
    }
    .intro-media-badge {
      position: absolute;
      bottom: 16px;
      left: 16px;
      z-index: 1;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: rgba(11, 27, 43, 0.7);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-tag);
      font-size: 13px;
      color: var(--color-text);
    }
    .intro-content {
      padding-right: 20px;
    }
    .intro-content .section-label {
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.08em;
      color: var(--color-accent);
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .intro-content h2 {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      color: var(--color-text);
      margin-bottom: 20px;
    }
    .intro-content p {
      font-size: 16px;
      line-height: 1.8;
      color: var(--color-text-secondary);
      margin-bottom: 24px;
    }
    .intro-points {
      display: grid;
      gap: 14px;
    }
    .intro-points li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      color: var(--color-text-secondary);
    }
    .intro-points li .check-icon {
      flex-shrink: 0;
      width: 22px;
      height: 22px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(34, 211, 238, 0.12);
      border-radius: 50%;
      font-size: 12px;
      color: var(--color-accent);
      margin-top: 2px;
    }
    @media (max-width: 1023px) {
      .intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .intro-content {
        padding-right: 0;
      }
    }
    @media (max-width: 767px) {
      .cat-intro {
        padding: var(--space-mobile) 0;
      }
      .intro-content h2 {
        font-size: 26px;
      }
      .intro-content p {
        font-size: 15px;
      }
    }

    /* ============ FEATURES ============ */
    .cat-features {
      padding: var(--space-section) 0;
      background: var(--color-bg);
      position: relative;
    }
    .cat-features::before {
      content: '';
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 600px;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      position: relative;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
      box-shadow: var(--shadow-card);
      overflow: hidden;
    }
    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
      opacity: 0.3;
      transition: opacity .3s ease;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--color-border-hover);
      box-shadow: var(--shadow-hover);
    }
    .feature-card:hover::before {
      opacity: 1;
    }
    .feature-card .icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(34, 211, 238, 0.1);
      border: 1px solid rgba(34, 211, 238, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .feature-card p {
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .feature-card .text-link {
      font-size: 14px;
    }
    .sonic-line {
      position: absolute;
      bottom: 12px;
      left: 28px;
      right: 28px;
      height: 8px;
      background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        transparent 5px,
        rgba(34, 211, 238, 0.25) 5px,
        rgba(34, 211, 238, 0.25) 6px,
        transparent 6px,
        transparent 14px
      );
      opacity: 0;
      transition: opacity .3s ease;
    }
    .feature-card:hover .sonic-line {
      opacity: 1;
    }
    @media (max-width: 1023px) {
      .feature-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 767px) {
      .cat-features {
        padding: var(--space-mobile) 0;
      }
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .feature-card h3 {
        font-size: 18px;
      }
    }

    /* ============ SCENARIOS ============ */
    .cat-scenarios {
      padding: var(--space-section) 0;
      background: var(--color-primary-light);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .scenario-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      text-align: center;
      transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      border-color: rgba(34, 211, 238, 0.35);
      box-shadow: var(--shadow-hover);
    }
    .scenario-card .scenario-icon {
      width: 64px;
      height: 64px;
      margin: 0 auto 16px;
      background: rgba(34, 211, 238, 0.08);
      border: 1px solid rgba(34, 211, 238, 0.18);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .scenario-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 10px;
    }
    .scenario-card p {
      font-size: 14px;
      color: var(--color-text-secondary);
      line-height: 1.7;
      margin-bottom: 14px;
    }
    .scenario-card .scene-tag {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(34, 211, 238, 0.08);
      border-radius: var(--radius-tag);
      font-size: 12px;
      color: var(--color-accent);
      font-weight: 500;
    }
    @media (max-width: 1023px) {
      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 767px) {
      .cat-scenarios {
        padding: var(--space-mobile) 0;
      }
      .scenario-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
      }
      .scenario-card {
        padding: 24px 16px;
      }
    }
    @media (max-width: 520px) {
      .scenario-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ============ PROCESS ============ */
    .cat-process {
      padding: var(--space-section) 0;
      background: var(--color-bg);
      position: relative;
      overflow: hidden;
    }
    .cat-process::after {
      content: '';
      position: absolute;
      right: -80px;
      top: 20%;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
    }
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      counter-reset: process;
      position: relative;
      z-index: 1;
    }
    .process-step {
      position: relative;
      text-align: center;
      padding: 32px 24px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.07);
      border-radius: var(--radius-card);
      transition: border-color .3s ease, box-shadow .3s ease;
    }
    .process-step:hover {
      border-color: rgba(34, 211, 238, 0.3);
      box-shadow: var(--shadow-hover);
    }
    .process-step .step-num {
      width: 44px;
      height: 44px;
      margin: 0 auto 20px;
      background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(14, 165, 233, 0.2));
      border: 1px solid rgba(34, 211, 238, 0.3);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-num);
      font-size: 18px;
      font-weight: 700;
      color: var(--color-accent);
    }
    .process-step h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 10px;
    }
    .process-step p {
      font-size: 14px;
      color: var(--color-text-secondary);
      line-height: 1.7;
    }
    .process-step::before {
      content: '';
      position: absolute;
      top: 50%;
      right: -32px;
      width: 32px;
      height: 1px;
      background: linear-gradient(90deg, rgba(34, 211, 238, 0.3), transparent);
    }
    .process-step:last-child::before {
      display: none;
    }
    @media (max-width: 1023px) {
      .process-steps {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
      }
      .process-step::before {
        display: none;
      }
    }
    @media (max-width: 767px) {
      .cat-process {
        padding: var(--space-mobile) 0;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
    }

    /* ============ FEATURED CONTENT ============ */
    .cat-featured {
      padding: var(--space-section) 0;
      background: var(--color-primary-light);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }
    .content-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .content-card {
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }
    .content-card:hover {
      transform: translateY(-4px);
      border-color: var(--color-border-hover);
      box-shadow: var(--shadow-hover);
    }
    .content-card .card-media {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16 / 9;
    }
    .content-card .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .4s ease;
    }
    .content-card:hover .card-media img {
      transform: scale(1.04);
    }
    .content-card .card-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      padding: 5px 12px;
      background: rgba(11, 27, 43, 0.75);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-tag);
      font-size: 12px;
      color: var(--color-text);
      font-weight: 500;
    }
    .content-card .card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .content-card .card-body h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--color-text);
      line-height: 1.45;
      margin-bottom: 10px;
    }
    .content-card .card-body p {
      font-size: 14px;
      color: var(--color-text-secondary);
      line-height: 1.7;
      flex: 1;
      margin-bottom: 16px;
    }
    .content-card .card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 13px;
      color: var(--color-text-muted);
    }
    @media (max-width: 1023px) {
      .content-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 767px) {
      .cat-featured {
        padding: var(--space-mobile) 0;
      }
      .content-grid {
        grid-template-columns: 1fr;
      }
      .content-card .card-body {
        padding: 20px;
      }
    }

    /* ============ FAQ ============ */
    .cat-faq {
      padding: var(--space-section) 0;
      background: var(--color-bg);
    }
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: grid;
      gap: 12px;
    }
    .faq-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      transition: border-color .3s ease, background .3s ease;
      overflow: hidden;
    }
    .faq-item.active {
      border-color: rgba(34, 211, 238, 0.35);
      background: rgba(255, 255, 255, 0.05);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      text-align: left;
      font-size: 17px;
      font-weight: 600;
      color: var(--color-text);
      background: none;
      border: none;
      cursor: pointer;
      transition: color .2s ease;
    }
    .faq-question:hover {
      color: var(--color-accent);
    }
    .faq-question .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: rgba(34, 211, 238, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: var(--color-accent);
      font-weight: 400;
      transition: transform .3s ease, background .3s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background: rgba(34, 211, 238, 0.2);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease, padding .3s ease;
      padding: 0 24px;
      color: var(--color-text-secondary);
      font-size: 15px;
      line-height: 1.75;
      border-left: 2px solid transparent;
    }
    .faq-item.active .faq-answer {
      max-height: 320px;
      padding: 0 24px 20px;
      border-left-color: var(--color-accent);
    }
    @media (max-width: 767px) {
      .cat-faq {
        padding: var(--space-mobile) 0;
      }
      .faq-question {
        font-size: 16px;
        padding: 16px 18px;
      }
      .faq-answer {
        padding: 0 18px;
        font-size: 14px;
      }
      .faq-item.active .faq-answer {
        padding: 0 18px 16px;
      }
    }

    /* ============ CTA ============ */
    .cat-cta {
      padding: var(--space-section) 0;
      background: var(--color-primary-light);
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      position: relative;
      overflow: hidden;
    }
    .cat-cta::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.4), transparent);
    }
    .cta-box {
      text-align: center;
      max-width: 720px;
      margin: 0 auto;
      padding: 56px 48px;
      background: linear-gradient(135deg, rgba(11, 27, 43, 0.9), rgba(14, 45, 71, 0.8));
      border: 1px solid rgba(34, 211, 238, 0.2);
      border-radius: 24px;
      position: relative;
      overflow: hidden;
    }
    .cta-box::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -80px;
      width: 220px;
      height: 220px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.15) 0%, transparent 70%);
    }
    .cta-box::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 300px;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    }
    .cta-box h2 {
      font-size: 32px;
      font-weight: 700;
      color: var(--color-text);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .cta-box p {
      font-size: 16px;
      color: var(--color-text-secondary);
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .cta-box .btn-primary {
      min-width: 200px;
      height: 52px;
      font-size: 16px;
    }
    @media (max-width: 767px) {
      .cat-cta {
        padding: var(--space-mobile) 0;
      }
      .cta-box {
        padding: 40px 24px;
      }
      .cta-box h2 {
        font-size: 26px;
      }
      .cta-box p {
        font-size: 15px;
      }
    }

    /* ============ FOOTER ============ */
    .site-footer {
      background: var(--color-primary-dark);
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 72px;
      position: relative;
    }
    .site-footer::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
      gap: 48px;
      padding-bottom: 48px;
    }
    .footer-brand .logo {
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 14px;
      color: var(--color-text-secondary);
      line-height: 1.7;
      max-width: 320px;
      margin-top: 16px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 20px;
    }
    .footer-col ul {
      display: grid;
      gap: 12px;
    }
    .footer-col ul a {
      font-size: 14px;
      color: var(--color-text-secondary);
      transition: color .2s ease;
    }
    .footer-col ul a:hover {
      color: var(--color-accent);
    }
    .footer-newsletter h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 12px;
    }
    .footer-newsletter p {
      font-size: 14px;
      color: var(--color-text-secondary);
      margin-bottom: 16px;
    }
    .newsletter-form {
      display: flex;
      gap: 8px;
    }
    .newsletter-form input {
      flex: 1;
      height: 44px;
      padding: 0 16px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-button);
      color: var(--color-text);
      font-size: 14px;
      transition: border-color .2s ease, box-shadow .2s ease;
    }
    .newsletter-form input::placeholder {
      color: var(--color-text-muted);
    }
    .newsletter-form input:focus {
      border-color: var(--color-accent);
      box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
    }
    .newsletter-form button {
      height: 44px;
      padding: 0 20px;
      background: linear-gradient(135deg, #22D3EE, #0EA5E9);
      color: #0B1B2B;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-button);
      transition: filter .2s ease, box-shadow .2s ease;
      white-space: nowrap;
    }
    .newsletter-form button:hover {
      filter: brightness(1.08);
      box-shadow: 0 0 16px rgba(34, 211, 238, 0.4);
    }
    .newsletter-success {
      display: none;
      align-items: center;
      gap: 6px;
      margin-top: 12px;
      font-size: 14px;
      color: var(--color-lime);
    }
    .newsletter-success.show {
      display: flex;
    }
    .newsletter-success span {
      font-weight: 700;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding: 24px 0;
      text-align: center;
    }
    .footer-bottom p {
      font-size: 13px;
      color: var(--color-text-muted);
    }
    @media (max-width: 1023px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
      }
    }
    @media (max-width: 767px) {
      .site-footer {
        padding-top: 48px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-brand p {
        max-width: 100%;
      }
      .newsletter-form {
        flex-direction: column;
      }
      .newsletter-form button {
        width: 100%;
      }
    }

    /* ============ FLOATING CTA ============ */
    .floating-cta {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 998;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: linear-gradient(135deg, #22D3EE, #0EA5E9);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 24px rgba(34, 211, 238, 0.4);
      opacity: 0;
      pointer-events: none;
      transform: translateY(20px);
      transition: opacity .4s ease, transform .4s ease, box-shadow .3s ease;
      cursor: pointer;
    }
    .floating-cta.visible {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }
    .floating-cta:hover {
      box-shadow: 0 0 32px rgba(34, 211, 238, 0.6);
    }
    .floating-cta:active {
      transform: scale(0.95);
    }

    /* ============ RESPONSIVE NAV ============ */
    @media (max-width: 1023px) {
      .nav-links {
        display: none;
      }
      .nav-cta {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .nav-container {
        gap: 12px;
      }
    }
    @media (min-width: 1024px) {
      .mobile-drawer {
        display: none;
      }
    }

/* roulang page: article */
:root {
  --color-bg-deep: #060D1F;
  --color-bg: #0B1530;
  --color-bg-alt: #101E3C;
  --color-bg-card: rgba(255,255,255,0.06);
  --color-primary: #22D3EE;
  --color-primary-dark: #0EA5E9;
  --color-accent: #C8F04A;
  --color-text: #F1F5F9;
  --color-text-sub: #94A3B8;
  --color-text-weak: #64748B;
  --color-border: rgba(255,255,255,0.08);
  --color-border-hover: rgba(34,211,238,0.4);
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-img: 12px;
  --radius-tag: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 48px rgba(34,211,238,0.12);
  --space-section: 96px;
  --container-width: 1200px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "DIN Alternate", "IBM Plex Sans", sans-serif;
  --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 10%, rgba(34,211,238,0.09), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(14,165,233,0.07), transparent 45%),
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 60px 60px, 60px 60px;
  z-index: -1;
  pointer-events: none;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }
input { font-family: inherit; }
ul, ol { list-style: none; }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }

.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #0B1B2B; font-weight: 600; font-size: 15px;
  border-radius: var(--radius-btn);
  box-shadow: 0 0 20px rgba(34,211,238,0.35);
  transition: var(--transition);
}
.btn-primary:hover { filter: brightness(1.1); box-shadow: 0 0 30px rgba(34,211,238,0.5); transform: translateY(-2px); }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 32px;
  background: transparent; color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-btn); font-weight: 600; font-size: 15px;
  transition: var(--transition);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(255,255,255,0.05); transform: translateY(-2px); }
.btn-secondary:active { transform: scale(0.98); }

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 80px;
  background: rgba(11, 21, 48, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(6, 13, 31, 0.92);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}
.nav-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 80px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; letter-spacing: 0.5px; flex-shrink: 0; }
.logo-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(34,211,238,0.12);
  border: 1px solid rgba(34,211,238,0.25);
  display: flex; align-items: center; justify-content: center;
}
.logo-text span { color: var(--color-primary); }
.nav-links { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.nav-links a {
  font-size: 15px; color: var(--color-text-sub);
  font-weight: 500; padding: 8px 2px; position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--color-text); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 128px; height: 44px; padding: 0 24px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #0B1B2B; font-weight: 600; font-size: 15px;
  border-radius: var(--radius-btn);
  box-shadow: 0 0 20px rgba(34,211,238,0.35);
  flex-shrink: 0;
}
.nav-cta:hover { filter: brightness(1.1); box-shadow: 0 0 28px rgba(34,211,238,0.5); transform: translateY(-1px); }
.nav-cta:active { transform: scale(0.98); }
.nav-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.nav-toggle span { width: 20px; height: 2px; background: var(--color-text); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.article-page-main { padding-top: 80px; flex: 1; }

.article-hero {
  position: relative;
  padding: 72px 0 48px;
  background:
    linear-gradient(rgba(11,21,48,0.9), rgba(11,21,48,0.94)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}
.article-hero::after {
  content: '';
  position: absolute;
  top: -120px; right: -80px;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(34,211,238,0.18), transparent 70%);
  pointer-events: none;
}
.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-sub);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.breadcrumb a { color: var(--color-text-sub); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .divider { color: var(--color-text-weak); }
.breadcrumb .current {
  color: var(--color-text); font-weight: 500;
  max-width: 380px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.article-title {
  font-size: clamp(32px, 5vw, 40px);
  line-height: 1.35;
  font-weight: 800;
  max-width: 860px;
  margin-bottom: 20px;
  position: relative; z-index: 1;
}
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 14px;
  font-size: 14px;
  color: var(--color-text-sub);
  position: relative; z-index: 1;
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--color-text-weak); }

.article-layout {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 72px;
}
.article-cover {
  width: 100%;
  aspect-ratio: 3 / 1;
  object-fit: cover;
  border-radius: var(--radius-img);
  box-shadow: var(--shadow-card);
  margin-bottom: 40px;
}

.article-body { font-size: 16px; color: var(--color-text); line-height: 1.9; }
.article-body p { margin: 24px 0; }
.article-body > p:first-child { margin-top: 0; }
.article-body h2 {
  font-size: 26px; font-weight: 700;
  margin: 48px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}
.article-body h3 { font-size: 20px; font-weight: 600; margin: 36px 0 12px; color: #E2E8F0; }
.article-body h4 { font-size: 18px; font-weight: 600; margin: 24px 0 12px; color: var(--color-text-sub); }
.article-body blockquote {
  margin: 32px 0;
  padding: 20px 24px;
  border-left: 4px solid var(--color-primary);
  background: rgba(34,211,238,0.06);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  color: var(--color-text-sub);
  font-size: 16px;
}
.article-body blockquote p { margin: 0; }
.article-body img { border-radius: var(--radius-img); margin: 32px 0; width: 100%; }
.article-body figure { margin: 32px 0; }
.article-body figcaption {
  text-align: center;
  font-size: 14px;
  color: var(--color-text-weak);
  margin-top: -16px;
  margin-bottom: 32px;
}
.article-body pre {
  background: #0d1b2e;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  margin: 24px 0;
}
.article-body code {
  font-family: "Consolas", "Courier New", monospace;
  background: rgba(255,255,255,0.08);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.9em;
}
.article-body pre code { background: transparent; padding: 0; }
.article-body ul, .article-body ol { margin: 24px 0; padding-left: 24px; }
.article-body li { margin: 8px 0; position: relative; }
.article-body ul li::before {
  content: '';
  position: absolute;
  left: -16px; top: 0.8em;
  width: 6px; height: 6px;
  border-radius: 1px;
  background: var(--color-primary);
}
.article-body ol { list-style: decimal; }
.article-body ol li::before { content: none; }
.article-body a { color: var(--color-primary); border-bottom: 1px solid rgba(34,211,238,0.3); }
.article-body a:hover { border-bottom-color: var(--color-primary); }
.article-body table { width: 100%; border-collapse: collapse; margin: 32px 0; font-size: 14px; }
.article-body th, .article-body td { padding: 12px 16px; border: 1px solid var(--color-border); text-align: left; }
.article-body th { background: rgba(255,255,255,0.04); color: var(--color-text); }

.article-empty {
  text-align: center;
  padding: 72px 24px;
  background: rgba(255,255,255,0.03);
  border: 1px dashed rgba(255,255,255,0.15);
  border-radius: var(--radius-card);
}
.article-empty .empty-icon { font-size: 44px; margin-bottom: 16px; line-height: 1; }
.article-empty p { color: var(--color-text-sub); margin-bottom: 24px; font-size: 16px; }
.article-empty a { display: inline-flex; align-items: center; gap: 6px; color: var(--color-primary); font-weight: 600; }
.article-empty a:hover { gap: 10px; }

.article-tags {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
}
.article-tags .label { font-size: 14px; color: var(--color-text-sub); margin-right: 4px; }
.tag {
  display: inline-flex;
  padding: 6px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-tag);
  font-size: 13px;
  color: var(--color-text-sub);
  transition: var(--transition);
}
.tag:hover { color: var(--color-primary); border-color: var(--color-border-hover); }

.article-pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
.pager-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-sub);
  background: rgba(255,255,255,0.02);
  transition: var(--transition);
}
.pager-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(34,211,238,0.06);
  transform: translateY(-2px);
}
.pager-link.next { margin-left: auto; flex-direction: row-reverse; }

.related-section {
  background: var(--color-bg-alt);
  padding: var(--space-section) 0;
  border-top: 1px solid var(--color-border);
}
.section-head { margin-bottom: 48px; text-align: center; }
.section-head .eyebrow {
  display: inline-block;
  padding: 6px 16px;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--color-primary);
  border: 1px solid rgba(34,211,238,0.3);
  border-radius: var(--radius-tag);
  margin-bottom: 16px;
}
.section-head h2 { font-size: clamp(26px, 3vw, 32px); font-weight: 700; margin-bottom: 12px; }
.section-head p { color: var(--color-text-sub); max-width: 480px; margin: 0 auto; font-size: 15px; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.related-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
}
.related-card .card-img { aspect-ratio: 16 / 9; overflow: hidden; border-bottom: 1px solid var(--color-border); }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.related-card .card-cat {
  align-self: flex-start;
  padding: 4px 12px;
  background: rgba(34,211,238,0.12);
  color: var(--color-primary);
  border-radius: var(--radius-tag);
  font-size: 12px;
  margin-bottom: 12px;
}
.related-card h3 { font-size: 18px; font-weight: 600; line-height: 1.5; margin-bottom: 10px; }
.related-card h3 a { transition: var(--transition); }
.related-card h3 a:hover { color: var(--color-primary); }
.related-card p {
  color: var(--color-text-sub);
  font-size: 14px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.related-card .card-date { margin-top: auto; color: var(--color-text-weak); font-size: 13px; }

.article-cta { padding: 72px 0; position: relative; overflow: hidden; }
.article-cta .cta-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 48px;
  background:
    linear-gradient(135deg, rgba(34,211,238,0.14), rgba(11,21,48,0.65)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border: 1px solid rgba(34,211,238,0.2);
  border-radius: 24px;
}
.article-cta h2 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.article-cta p { color: var(--color-text-sub); margin-bottom: 28px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.site-footer {
  background: var(--color-bg-deep);
  padding: 72px 0 32px;
  margin-top: auto;
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 40px;
  margin-bottom: 56px;
}
.footer-brand p { margin-top: 16px; color: var(--color-text-sub); font-size: 15px; max-width: 260px; line-height: 1.7; }
.footer-col h4, .footer-newsletter h4 { font-size: 16px; font-weight: 600; color: var(--color-text); margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { color: var(--color-text-sub); font-size: 15px; }
.footer-col ul a:hover { color: var(--color-primary); padding-left: 6px; }
.footer-newsletter p { color: var(--color-text-sub); font-size: 14px; margin-bottom: 20px; }
.newsletter-form { display: flex; gap: 10px; }
.newsletter-form input {
  flex: 1; min-width: 0;
  height: 44px; padding: 0 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-btn);
  color: var(--color-text);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}
.newsletter-form input::placeholder { color: var(--color-text-weak); }
.newsletter-form input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(34,211,238,0.15); }
.newsletter-form button {
  height: 44px; padding: 0 22px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #0B1B2B;
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius-btn);
  white-space: nowrap;
  transition: var(--transition);
}
.newsletter-form button:hover { filter: brightness(1.1); box-shadow: 0 0 20px rgba(34,211,238,0.4); }
.newsletter-success {
  display: none;
  margin-top: 12px;
  color: var(--color-accent);
  font-size: 14px;
  align-items: center;
  gap: 6px;
}
.newsletter-success.show { display: flex; }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  text-align: center;
  color: var(--color-text-weak);
  font-size: 13px;
}

@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: min(360px, 100%);
    height: 100vh;
    background: rgba(6,13,31,0.98);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    padding: 80px 40px 120px;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 998;
    margin: 0;
  }
  .nav-links.open { transform: translateX(0); opacity: 1; visibility: visible; }
  .nav-links a { font-size: 18px; }
  .nav-toggle { display: flex; margin-left: auto; z-index: 1000; }
  .nav-cta { display: none; }
  .nav-links.open ~ .nav-cta {
    display: flex;
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 80px);
    min-width: 0;
    z-index: 1001;
  }
  .article-cta .cta-inner { padding: 48px 32px; }
}

@media (max-width: 767px) {
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .article-hero { padding: 48px 0 36px; }
  .article-layout { padding: 32px 16px 48px; }
  .article-meta { gap: 10px; row-gap: 8px; }
  .article-cover { aspect-ratio: 16 / 9; border-radius: 8px; }
  .section-head { margin-bottom: 32px; }
  .article-pager { flex-direction: column; }
  .pager-link { width: 100%; justify-content: center; }
  .pager-link.next { margin-left: 0; }
  .article-cta { padding: 48px 0; }
  .article-cta .cta-inner { padding: 40px 20px; border-radius: 16px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn-primary, .cta-actions .btn-secondary { width: 100%; }
  .newsletter-form { flex-direction: column; }
  .newsletter-form button { width: 100%; }
  .breadcrumb .current { max-width: 220px; }
}

/* roulang page: category2 */
:root {
  --color-bg: #0B1530;
  --color-bg-alt: #101E3C;
  --color-bg-footer: #060D1F;
  --color-primary: #0B1B2B;
  --color-cyan: #22D3EE;
  --color-cyan-deep: #0EA5E9;
  --color-lime: #C8F04A;
  --color-text: #F1F5F9;
  --color-text-muted: #94A3B8;
  --color-text-weak: #64748B;
  --color-border: rgba(255,255,255,0.08);
  --color-border-hover: rgba(34,211,238,0.4);
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-img: 12px;
  --radius-tag: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 48px rgba(34,211,238,0.12);
  --shadow-btn: 0 0 20px rgba(34,211,238,0.35);
  --space-section: 96px;
  --container-w: 1200px;
  --font-cn: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num: "DIN Alternate","IBM Plex Sans",sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button,
input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

.anchor {
  display: block;
  height: 0;
  overflow: hidden;
  position: relative;
  top: -72px;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(11,27,43,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(6,13,31,0.92);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}

.nav-container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34,211,238,0.12);
  border: 1px solid rgba(34,211,238,0.25);
  border-radius: 12px;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.logo:hover .logo-icon {
  background: rgba(34,211,238,0.2);
  box-shadow: 0 0 20px rgba(34,211,238,0.2);
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: #fff;
  white-space: nowrap;
}

.logo-text span {
  color: var(--color-cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 8px 0;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-cyan);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  min-width: 128px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  box-shadow: var(--shadow-btn);
  transition: filter 0.3s ease, box-shadow 0.3s ease, transform 0.15s ease;
  white-space: nowrap;
}

.nav-cta:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 32px rgba(34,211,238,0.5);
}

.nav-cta:active {
  transform: scale(0.98);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  z-index: 95;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 160px 0 80px;
  background: linear-gradient(rgba(11,21,48,0.86), rgba(11,21,48,0.9)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 1;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -120px;
  left: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34,211,238,0.22), transparent 65%);
  animation: floatGlow 7s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

@keyframes floatGlow {
  0% {
    opacity: 0.25;
    transform: translate3d(0, 0, 0);
  }
  100% {
    opacity: 0.55;
    transform: translate3d(30px, 20px, 0);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  width: 100%;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid rgba(34,211,238,0.4);
  border-radius: var(--radius-tag);
  color: var(--color-cyan);
  font-size: 13px;
  font-weight: 600;
  background: rgba(34,211,238,0.08);
}

.hero-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-cyan);
  box-shadow: 0 0 8px var(--color-cyan);
}

.page-hero h1 {
  font-size: 64px;
  font-weight: 800;
  line-height: 1.15;
  margin: 20px 0 16px;
  letter-spacing: 1px;
  color: var(--color-text);
}

.page-hero h1 .gradient {
  background: linear-gradient(120deg, #22D3EE, #7AE8FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 18px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 32px rgba(34,211,238,0.5);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: scale(0.98) translateY(0);
}

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
}

.btn-secondary:hover {
  border-color: var(--color-cyan);
  background: rgba(255,255,255,0.05);
  box-shadow: 0 0 24px rgba(34,211,238,0.15);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: scale(0.98);
}

.hero-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-card);
}

.hero-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 12px;
}

.hero-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 8px 4px;
  flex-wrap: wrap;
}

.hero-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-muted);
  font-family: var(--font-num);
}

.hero-card-meta span i {
  font-style: normal;
  color: var(--color-lime);
  font-weight: 700;
}

/* ===== Section base ===== */
.section {
  padding: var(--space-section) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-cyan);
  text-transform: none;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section-tag::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--color-cyan);
  border-radius: 2px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 16px;
}

.section-lead {
  font-size: 16px;
  color: var(--color-text-muted);
  max-width: 640px;
  line-height: 1.7;
}

/* ===== Intro split ===== */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split-media {
  position: relative;
  border-radius: var(--radius-img);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.split-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(6,13,31,0.25), transparent 40%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-img);
  pointer-events: none;
}

.split-media img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.split-content p {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 520px;
}

.data-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.data-tag {
  padding: 10px 18px;
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.25);
  border-radius: var(--radius-tag);
  font-size: 14px;
  color: var(--color-text);
  font-family: var(--font-num);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.data-tag strong {
  color: var(--color-lime);
  font-size: 18px;
  font-weight: 800;
}

/* ===== Feature cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.feature-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34,211,238,0.12);
  border: 1px solid rgba(34,211,238,0.2);
  border-radius: 12px;
  margin-bottom: 20px;
  transition: background 0.3s ease;
}

.feature-card:hover .feature-icon {
  background: rgba(34,211,238,0.2);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Collection cards ===== */
.collection-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.collection-card {
  position: relative;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.collection-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 64px;
  height: 64px;
  background-image:
    linear-gradient(rgba(34,211,238,0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34,211,238,0.28) 1px, transparent 1px);
  background-size: 12px 12px;
  border-radius: 0 16px 0 12px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 2;
}

.collection-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
}

.collection-media {
  overflow: hidden;
}

.collection-media img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.collection-card:hover .collection-media img {
  transform: scale(1.04);
}

.collection-body {
  padding: 24px;
}

.collection-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.collection-body p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.collection-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-tag {
  display: inline-flex;
  padding: 4px 12px;
  background: rgba(34,211,238,0.1);
  border: 1px solid rgba(34,211,238,0.2);
  border-radius: var(--radius-tag);
  font-size: 12px;
  color: var(--color-cyan);
  font-weight: 500;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-cyan);
  transition: gap 0.3s ease;
}

.text-link:hover {
  gap: 10px;
}

.text-link::after {
  content: "→";
  font-size: 16px;
  line-height: 1;
}

/* ===== Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.step-card {
  position: relative;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
}

.step-num {
  font-family: var(--font-num);
  font-size: 48px;
  font-weight: 800;
  color: var(--color-lime);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.9;
}

.step-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.step-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 860px;
  margin: 48px auto 0;
}

.faq-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item.open {
  border-color: rgba(34,211,238,0.4);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.faq-q:hover {
  color: var(--color-cyan);
}

.faq-icon {
  position: relative;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-cyan);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.faq-icon::before {
  width: 16px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 16px;
}

.faq-item.open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-item.open .faq-icon::before {
  transform: translate(-50%, -50%) rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.8;
}

.faq-item.open .faq-a {
  max-height: 240px;
  padding-bottom: 20px;
}

/* ===== Related categories ===== */
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.related-card {
  display: block;
  padding: 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
}

.related-card.current {
  border-color: rgba(34,211,238,0.55);
  background: rgba(34,211,238,0.08);
}

.related-card.current::after {
  content: "当前分类";
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 3px 10px;
  background: var(--color-cyan);
  color: #0B1B2B;
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--radius-tag);
}

.related-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  padding-right: 56px;
}

.related-card p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 96px 0;
  overflow: hidden;
  background: radial-gradient(circle at 30% 30%, rgba(34,211,238,0.2), transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(14,165,233,0.18), transparent 45%),
    linear-gradient(135deg, #0B1B2B, #0F2A44);
}

.cta-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-inner p {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Floating CTA ===== */
.floating-cta {
  position: fixed;
  right: 32px;
  bottom: 32px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(34,211,238,0.45);
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  z-index: 90;
}

.floating-cta.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.floating-cta:hover {
  box-shadow: 0 0 32px rgba(34,211,238,0.65);
  transform: scale(1.05);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-footer);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 24px;
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 16px;
  line-height: 1.8;
  max-width: 280px;
}

.footer-col h4,
.footer-newsletter h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: var(--color-text-muted);
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer-col ul a:hover {
  color: var(--color-cyan);
  padding-left: 4px;
}

.footer-newsletter p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.newsletter-form {
  display: flex;
  gap: 8px;
}

.newsletter-form input {
  flex: 1;
  height: 44px;
  padding: 0 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-btn);
  color: var(--color-text);
  font-size: 14px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.newsletter-form input::placeholder {
  color: var(--color-text-weak);
}

.newsletter-form input:focus {
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
  outline: none;
}

.newsletter-form button {
  height: 44px;
  padding: 0 20px;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  white-space: nowrap;
  transition: filter 0.3s ease, box-shadow 0.3s ease;
}

.newsletter-form button:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 20px rgba(34,211,238,0.4);
}

.newsletter-success {
  display: none;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--color-lime);
  margin-top: 12px;
}

.newsletter-success.show {
  display: flex;
}

.newsletter-success span {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(200,240,74,0.15);
  border: 1px solid var(--color-lime);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-weak);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 420px;
    height: 100vh;
    background: rgba(6,13,31,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 100px 32px 120px;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 90;
    box-shadow: -16px 0 48px rgba(0,0,0,0.4);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links a {
    width: 100%;
    font-size: 20px;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links a::after {
    display: none;
  }

  .nav-cta {
    position: fixed;
    left: 24px;
    right: 24px;
    bottom: 24px;
    height: 52px;
    z-index: 96;
    margin: 0;
    width: auto;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .page-hero {
    padding-top: 130px;
  }

  .page-hero h1 {
    font-size: 48px;
  }

  .split-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .features-grid,
  .collection-grid,
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  :root {
    --space-section: 64px;
  }

  .container {
    padding: 0 16px;
  }

  .nav-container {
    padding: 0 16px;
  }

  .logo-text {
    font-size: 18px;
  }

  .page-hero {
    min-height: auto;
    padding: 120px 0 64px;
  }

  .page-hero h1 {
    font-size: 36px;
  }

  .hero-desc {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .hero-card-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-title {
    font-size: 26px;
  }

  .features-grid,
  .collection-grid,
  .steps-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .collection-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .faq-q {
    font-size: 16px;
    padding: 18px 20px;
  }

  .cta-inner h2 {
    font-size: 28px;
  }

  .cta-section {
    padding: 64px 0;
  }

  .floating-cta {
    right: 20px;
    bottom: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-form button {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .hero-card {
    padding: 10px;
  }

  .data-tags {
    flex-direction: column;
    align-items: flex-start;
  }

  .data-tag {
    width: 100%;
    justify-content: space-between;
  }

  .related-card.current::after {
    font-size: 10px;
    padding: 2px 8px;
  }
}

/* roulang page: category3 */
:root {
  --color-bg-dark: #0B1530;
  --color-bg-deep: #060D1F;
  --color-bg-panel: #101E3C;
  --color-primary: #22D3EE;
  --color-primary-deep: #0EA5E9;
  --color-accent: #C8F04A;
  --color-text-main: #F1F5F9;
  --color-text-sub: #94A3B8;
  --color-text-weak: #64748B;
  --color-border: rgba(255,255,255,0.08);
  --color-border-hover: rgba(34,211,238,0.4);
  --color-glass-bg: rgba(255,255,255,0.05);
  --color-glass-border: rgba(255,255,255,0.08);
  --color-danger: #F87171;
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-img: 12px;
  --radius-tag: 999px;
  --radius-icon: 12px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-card-hover: 0 16px 48px rgba(34,211,238,0.12);
  --shadow-btn-glow: 0 0 20px rgba(34,211,238,0.35);
  --space-section: 96px;
  --space-section-mobile: 64px;
  --container-max: 1200px;
  --container-padding: 24px;
  --container-padding-mobile: 16px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "DIN Alternate", "IBM Plex Sans", sans-serif;
  --header-height: 76px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-main);
  background-color: var(--color-bg-dark);
  background-image: radial-gradient(circle at 15% 20%, rgba(34,211,238,0.06) 0%, transparent 35%),
    radial-gradient(circle at 85% 80%, rgba(14,165,233,0.05) 0%, transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(255,255,255,0.02) 0%, transparent 30%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-img);
}
button,
input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}
.section {
  padding: var(--space-section) 0;
}
.section-alt {
  background: var(--color-bg-panel);
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.section-head p {
  font-size: 16px;
  color: var(--color-text-sub);
  line-height: 1.6;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-tag);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(34,211,238,0.1);
  border: 1px solid rgba(34,211,238,0.2);
  margin-bottom: 16px;
}
/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(11,21,48,0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(6,13,31,0.92);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.nav-container {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(34,211,238,0.1);
  border: 1px solid rgba(34,211,238,0.25);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}
.logo:hover .logo-icon {
  background: rgba(34,211,238,0.18);
  box-shadow: 0 0 16px rgba(34,211,238,0.2);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-main);
  white-space: nowrap;
}
.logo-text span {
  color: var(--color-primary);
  font-weight: 500;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text-sub);
  border-radius: 6px;
  transition: color 0.2s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text-main);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}
.nav-links a.active {
  color: var(--color-primary);
  font-weight: 500;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 128px;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  background: linear-gradient(135deg, #22D3EE 0%, #0EA5E9 100%);
  color: #0B1B2B;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 0 20px rgba(34,211,238,0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  white-space: nowrap;
}
.nav-cta:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 30px rgba(34,211,238,0.4);
  transform: translateY(-1px);
}
.nav-cta:active {
  transform: scale(0.98);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  transition: background 0.2s ease, border-color 0.2s ease;
}
.nav-toggle:hover {
  background: rgba(255,255,255,0.1);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-main);
  border-radius: 2px;
  margin: 0 auto;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* Mobile drawer */
.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(6,13,31,0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  padding: 32px 24px 24px;
  transform: translateX(100%);
  transition: transform 0.35s ease;
  overflow-y: auto;
}
.mobile-drawer.open {
  transform: translateX(0);
}
.mobile-drawer a.drawer-link {
  display: block;
  padding: 18px 12px;
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-main);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.mobile-drawer a.drawer-link:hover,
.mobile-drawer a.drawer-link.active {
  color: var(--color-primary);
  padding-left: 18px;
}
.mobile-drawer a.drawer-link.active {
  border-left: 3px solid var(--color-primary);
}
.mobile-drawer .drawer-cta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 52px;
  border-radius: var(--radius-btn);
  background: linear-gradient(135deg, #22D3EE 0%, #0EA5E9 100%);
  color: #0B1B2B;
  font-size: 17px;
  font-weight: 600;
  box-shadow: 0 0 24px rgba(34,211,238,0.3);
  margin-top: 32px;
}
/* ===== Hero ===== */
.category-hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
  background-image: linear-gradient(rgba(11,21,48,0.78), rgba(11,21,48,0.92)), url("/assets/images/backpic/back-2.webp");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}
.category-hero::before {
  content: "";
  position: absolute;
  top: -200px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(34,211,238,0.15) 0%, transparent 70%);
  animation: floatGlow 8s ease-in-out infinite;
  pointer-events: none;
}
.category-hero::after {
  content: "";
  position: absolute;
  bottom: -150px;
  right: -100px;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(14,165,233,0.12) 0%, transparent 70%);
  animation: floatGlow 6s ease-in-out infinite reverse;
  pointer-events: none;
}
@keyframes floatGlow {
  0%, 100% { opacity: 0.35; transform: translateY(0); }
  50% { opacity: 0.7; transform: translateY(30px); }
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
  width: 100%;
}
.hero-copy .tag {
  margin-bottom: 20px;
}
.hero-copy h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--color-text-main);
}
.hero-copy h1 .gradient-text {
  background: linear-gradient(120deg, #22D3EE 20%, #67E8F9 60%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-copy .hero-sub {
  font-size: 17px;
  color: var(--color-text-sub);
  max-width: 460px;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #22D3EE 0%, #0EA5E9 100%);
  color: #0B1B2B;
  box-shadow: var(--shadow-btn-glow);
}
.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 32px rgba(34,211,238,0.5);
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
}
.btn-secondary:hover {
  border-color: rgba(34,211,238,0.6);
  background: rgba(255,255,255,0.05);
  transform: translateY(-2px);
}
.btn-secondary:active {
  transform: scale(0.98);
}
.btn:focus-visible,
.nav-cta:focus-visible,
.nav-toggle:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}
.hero-visual {
  position: relative;
}
.hero-glass {
  position: relative;
  background: var(--color-glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.hero-glass:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(34,211,238,0.3);
}
.hero-glass img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 12px;
}
.hero-glass-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 6px 6px;
  font-size: 13px;
  color: var(--color-text-sub);
}
.hero-glass-caption .live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  background: rgba(200,240,74,0.12);
  color: var(--color-accent);
  font-weight: 500;
  font-size: 12px;
}
.live-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
/* Ring spectrum decoration */
.ring-spectrum {
  position: absolute;
  right: -40px;
  top: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 2px solid rgba(34,211,238,0.15);
  border-top-color: var(--color-primary);
  border-right-color: rgba(200,240,74,0.5);
  animation: rotateSlow 12s linear infinite;
  pointer-events: none;
}
.ring-spectrum::before {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: 50%;
  border: 2px dashed rgba(255,255,255,0.1);
  animation: rotateSlow 18s linear infinite reverse;
}
.ring-spectrum::after {
  content: "";
  position: absolute;
  inset: 38px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34,211,238,0.3) 0%, transparent 70%);
  filter: blur(2px);
}
@keyframes rotateSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
/* ===== Stats bar ===== */
.stats-section {
  padding: 48px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: rgba(6,13,31,0.5);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item {
  padding: 24px 12px;
}
.stat-num {
  font-family: var(--font-num);
  font-size: 42px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.stat-unit {
  font-family: var(--font-num);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-accent);
  margin-left: 4px;
}
.stat-label {
  font-size: 14px;
  color: var(--color-text-sub);
  margin-top: 8px;
}
/* ===== Feature cards ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  position: relative;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(34,211,238,0.35);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-icon);
  background: rgba(34,211,238,0.1);
  border: 1px solid rgba(34,211,238,0.15);
  margin-bottom: 20px;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover .feature-icon {
  background: rgba(34,211,238,0.2);
  box-shadow: 0 0 16px rgba(34,211,238,0.15);
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}
.feature-card p {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.65;
  margin-bottom: 20px;
}
.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
  transition: gap 0.2s ease;
}
.feature-link:hover {
  gap: 12px;
}
.feature-link::after {
  content: "→";
  font-size: 16px;
}
/* ===== Split intro ===== */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split-media {
  position: relative;
}
.split-media img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.split-media::after {
  content: "";
  position: absolute;
  inset: 16px -16px -16px 16px;
  border: 1px solid rgba(34,211,238,0.2);
  border-radius: var(--radius-card);
  z-index: -1;
}
.split-copy h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.split-copy p {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.7;
  margin-bottom: 20px;
}
.split-points {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}
.split-point {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.split-point-check {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(34,211,238,0.1);
  border: 1px solid rgba(34,211,238,0.3);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
  margin-top: 2px;
}
.split-point h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 4px;
}
.split-point p {
  font-size: 14px;
  color: var(--color-text-sub);
  margin-bottom: 0;
  line-height: 1.5;
}
/* ===== Scenario cards ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.scenario-card {
  position: relative;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(34,211,238,0.3);
}
.scenario-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-card:hover img {
  transform: scale(1.03);
}
.scenario-card-body {
  padding: 24px 24px 28px;
}
.scenario-card-body h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 10px;
}
.scenario-card-body p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.6;
  margin-bottom: 14px;
}
.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.scenario-tags span {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--color-text-sub);
  font-size: 12px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.scenario-tags span:hover {
  color: var(--color-primary);
  border-color: rgba(34,211,238,0.3);
}
/* ===== Process ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  counter-reset: process-item;
}
.process-item {
  position: relative;
  padding: 32px 24px;
  text-align: center;
  position: relative;
}
.process-item::before {
  counter-increment: process-item;
  content: counter(process-item, decimal-leading-zero);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  font-family: var(--font-num);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(34,211,238,0.1);
  border: 1px solid rgba(34,211,238,0.25);
}
.process-item::after {
  content: "";
  position: absolute;
  top: 56px;
  right: -20px;
  width: 40px;
  height: 1px;
  background: linear-gradient(to right, rgba(34,211,238,0.4), transparent);
}
.process-item:last-child::after {
  display: none;
}
.process-item h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 10px;
}
.process-item p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.55;
  max-width: 220px;
  margin: 0 auto;
}
/* ===== Testimonial ===== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.testimonial-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34,211,238,0.3);
}
.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(34,211,238,0.3), rgba(14,165,233,0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
  border: 1px solid rgba(34,211,238,0.2);
}
.testimonial-card blockquote {
  font-size: 15px;
  color: var(--color-text-main);
  line-height: 1.7;
  margin-bottom: 16px;
  quotes: "\201C""\201D";
}
.testimonial-card blockquote::before {
  content: open-quote;
  color: var(--color-primary);
  font-size: 20px;
}
.testimonial-card blockquote::after {
  content: close-quote;
  color: var(--color-primary);
  font-size: 20px;
}
.testimonial-author {
  font-size: 14px;
  color: var(--color-text-sub);
}
.testimonial-stars {
  color: var(--color-accent);
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
/* ===== FAQ ===== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  margin-bottom: 12px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}
.faq-item:hover {
  border-color: rgba(34,211,238,0.25);
}
.faq-item.active {
  border-color: rgba(34,211,238,0.4);
  box-shadow: 0 4px 20px rgba(34,211,238,0.08);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-main);
  transition: color 0.2s ease;
  position: relative;
}
.faq-item.active .faq-question {
  color: var(--color-primary);
}
.faq-item.active .faq-question::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}
.faq-question .faq-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  position: relative;
}
.faq-question .faq-icon::before,
.faq-question .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--color-text-sub);
  border-radius: 2px;
  transition: background 0.3s ease, transform 0.3s ease;
}
.faq-question .faq-icon::before {
  width: 10px;
  height: 2px;
}
.faq-question .faq-icon::after {
  width: 2px;
  height: 10px;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: rgba(34,211,238,0.15);
  border-color: rgba(34,211,238,0.3);
}
.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after {
  background: var(--color-primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.active .faq-answer {
  max-height: 300px;
}
.faq-answer-inner {
  padding: 0 24px 24px 24px;
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.7;
  border-top: 1px solid rgba(255,255,255,0.04);
  margin-top: 0;
  padding-top: 18px;
}
/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 96px 0;
  text-align: center;
  overflow: hidden;
  background-image: linear-gradient(rgba(11,21,48,0.85), rgba(11,21,48,0.92)), url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(34,211,238,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.cta-section h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  position: relative;
}
.cta-section p {
  font-size: 17px;
  color: var(--color-text-sub);
  max-width: 520px;
  margin: 0 auto 36px;
  position: relative;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
}
/* ===== Category links ===== */
.category-nav-section {
  padding: 64px 0;
}
.category-link-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.category-link-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-card);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}
.category-link-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34,211,238,0.3);
  background: rgba(255,255,255,0.06);
}
.category-link-card.current {
  border-color: rgba(34,211,238,0.5);
  background: rgba(34,211,238,0.06);
}
.category-link-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 8px;
}
.category-link-card p {
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.5;
  margin-bottom: 14px;
  flex: 1;
}
.category-link-card .arrow {
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
}
/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-deep);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 72px 0 0;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.2), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--color-text-sub);
  margin-top: 16px;
  max-width: 260px;
  line-height: 1.6;
}
.footer-col h4,
.footer-newsletter h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 20px;
}
.footer-col ul {
  display: grid;
  gap: 12px;
}
.footer-col a {
  font-size: 14px;
  color: var(--color-text-sub);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}
.footer-newsletter p {
  font-size: 14px;
  color: var(--color-text-sub);
  margin-bottom: 16px;
  line-height: 1.5;
}
.newsletter-form {
  display: flex;
  gap: 8px;
}
.newsletter-form input {
  flex: 1;
  height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-btn);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--color-text-main);
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.newsletter-form input::placeholder {
  color: var(--color-text-weak);
}
.newsletter-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
}
.newsletter-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  height: 44px;
  border-radius: var(--radius-btn);
  background: linear-gradient(135deg, #22D3EE 0%, #0EA5E9 100%);
  color: #0B1B2B;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.newsletter-form button:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 16px rgba(34,211,238,0.3);
}
.newsletter-success {
  display: none;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-accent);
  margin-top: 12px;
}
.newsletter-success.visible {
  display: flex;
}
.newsletter-success span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(200,240,74,0.15);
  font-size: 12px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-weak);
}
/* Floating CTA */
.floating-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #22D3EE 0%, #0EA5E9 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(34,211,238,0.3), 0 0 20px rgba(34,211,238,0.2);
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.floating-cta.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.floating-cta:hover {
  box-shadow: 0 12px 40px rgba(34,211,238,0.4), 0 0 30px rgba(34,211,238,0.25);
  transform: translateY(-2px) scale(1.04);
}
.floating-cta:active {
  transform: translateY(0) scale(0.96);
}
.floating-cta svg {
  width: 24px;
  height: 24px;
  color: #0B1B2B;
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 60px;
  }
  .hero-copy {
    text-align: center;
  }
  .hero-copy .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-visual {
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
  }
  .ring-spectrum {
    display: none;
  }
  .category-hero {
    min-height: auto;
    padding-bottom: 80px;
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .process-item::after {
    display: none;
  }
  .split-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .split-media::after {
    display: none;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  .category-link-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 767px) {
  :root {
    --space-section: 64px;
    --container-padding: 16px;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .hero-copy h1 {
    font-size: 36px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .process-item {
    padding: 24px 16px;
  }
  .process-item::after {
    display: none;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .stat-num {
    font-size: 32px;
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .newsletter-form {
    flex-direction: column;
  }
  .newsletter-form button {
    width: 100%;
  }
  .category-link-grid {
    grid-template-columns: 1fr;
  }
  .cta-section h2 {
    font-size: 28px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .split-section {
    gap: 32px;
  }
  .split-copy h2 {
    font-size: 24px;
  }
  .floating-cta {
    right: 16px;
    bottom: 16px;
  }
}

/* roulang page: category4 */
/* ===== Design Variables ===== */
:root {
  --color-primary: #0B1B2B;
  --color-secondary: #22D3EE;
  --color-accent: #C8F04A;
  --color-bg: #0B1530;
  --color-bg-alt: #101E3C;
  --color-bg-dark: #060D1F;
  --color-text: #F1F5F9;
  --color-text-sub: #94A3B8;
  --color-text-dim: #64748B;
  --color-border: rgba(255,255,255,0.08);
  --color-border-hover: rgba(34,211,238,0.4);
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.08);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-card-hover: 0 16px 48px rgba(34,211,238,0.12);
  --shadow-btn: 0 0 20px rgba(34,211,238,0.35);
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-img: 12px;
  --radius-tag: 999px;
  --radius-icon: 12px;
  --space-section: 96px;
  --space-section-mobile: 64px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "DIN Alternate", "IBM Plex Sans", sans-serif;
  --container: 1200px;
}

/* ===== Reset / Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-cn);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}
a:hover { color: var(--color-secondary); }
ul, ol { list-style: none; }
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}
button { cursor: pointer; }
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 27, 43, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
.site-header.scrolled {
  background: rgba(6, 13, 31, 0.92);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}
.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(34, 211, 238, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(34, 211, 238, 0.25);
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.02em;
}
.logo-text span {
  color: var(--color-secondary);
  font-weight: 700;
  font-size: 14px;
  margin-left: 4px;
  letter-spacing: 0.08em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: var(--color-text-sub);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 8px 0;
  transition: color 0.3s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-secondary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}
.nav-cta {
  min-width: 128px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #22D3EE 0%, #0EA5E9 100%);
  color: #0B1B2B;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-btn);
  padding: 0 24px;
  box-shadow: var(--shadow-btn);
  transition: all 0.3s ease;
  flex-shrink: 0;
}
.nav-cta:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.5);
  color: #0B1B2B;
}
.nav-cta:active {
  transform: scale(0.98);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== Category Hero ===== */
.cat-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  overflow: hidden;
  background: linear-gradient(135deg, #0B1B2B 0%, #0E2440 50%, #0B1530 100%);
}
.cat-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
}
.cat-hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,27,43,0.92) 20%, rgba(11,27,43,0.65) 60%, rgba(11,21,48,0.9) 100%);
}
.cat-hero-decor {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34,211,238,0.18) 0%, transparent 60%);
  pointer-events: none;
}
.cat-hero-decor-2 {
  position: absolute;
  bottom: -140px;
  left: 10%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200,240,74,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.cat-hero .container {
  position: relative;
  z-index: 2;
}
.cat-hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-dim);
  margin-bottom: 20px;
}
.cat-hero-breadcrumb a {
  color: var(--color-text-dim);
  transition: color 0.3s ease;
}
.cat-hero-breadcrumb a:hover {
  color: var(--color-secondary);
}
.cat-hero-breadcrumb .sep {
  color: var(--color-text-dim);
  opacity: 0.5;
}
.cat-hero-breadcrumb .current {
  color: var(--color-text-sub);
}
.cat-hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(90deg, #F1F5F9 10%, #22D3EE 60%, #F1F5F9 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cat-hero-sub {
  font-size: 18px;
  color: var(--color-text-sub);
  max-width: 520px;
  line-height: 1.6;
  margin-bottom: 32px;
}
.cat-hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  font-weight: 700;
  font-size: 16px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  box-shadow: var(--shadow-btn);
  transition: all 0.3s ease;
}
.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 28px rgba(34,211,238,0.5);
  color: #0B1B2B;
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-outline {
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-text);
  font-weight: 600;
  font-size: 16px;
  padding: 0 28px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-btn);
  transition: all 0.3s ease;
}
.btn-outline:hover {
  border-color: rgba(34,211,238,0.6);
  color: var(--color-secondary);
  background: rgba(255,255,255,0.05);
}

/* ===== Intro Section ===== */
.section {
  padding: var(--space-section) 0;
  position: relative;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}
.section-head p {
  font-size: 15px;
  color: var(--color-text-sub);
  max-width: 480px;
  margin: 0 auto;
}
.cat-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.cat-intro-img {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: var(--shadow-card);
}
.cat-intro-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.cat-intro-img:hover img {
  transform: scale(1.04);
}
.cat-intro-img::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-card);
  pointer-events: none;
}
.cat-intro-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(11,27,43,0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-tag);
  border: 1px solid rgba(200,240,74,0.3);
  z-index: 2;
}
.cat-intro-text h3 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.4;
}
.cat-intro-text > p {
  color: var(--color-text-sub);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.intro-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.intro-tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: var(--radius-tag);
  font-size: 13px;
  color: var(--color-text-sub);
  transition: all 0.3s ease;
}
.intro-tag-item:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text);
}
.intro-tag-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* ===== Feature Cards ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
  height: 100%;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, transparent 50%, rgba(34,211,238,0.08) 50%);
  pointer-events: none;
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-icon);
  background: rgba(34,211,238,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border: 1px solid rgba(34,211,238,0.2);
  transition: all 0.3s ease;
}
.feature-card:hover .feature-icon {
  background: rgba(34,211,238,0.22);
  box-shadow: 0 0 20px rgba(34,211,238,0.2);
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.65;
  margin-bottom: 16px;
}
.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-secondary);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
}
.feature-link:hover {
  gap: 8px;
}
.feature-link .arrow {
  transition: transform 0.3s ease;
}
.feature-link:hover .arrow {
  transform: translateX(4px);
}

/* ===== Scene Section ===== */
.scene-section {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 50%, var(--color-bg) 100%);
}
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scene-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 36px 28px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.scene-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-secondary), transparent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.scene-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.scene-card:hover::after {
  transform: scaleX(1);
}
.scene-num {
  font-family: var(--font-num);
  font-size: 48px;
  font-weight: 700;
  color: rgba(200,240,74,0.4);
  line-height: 1;
  margin-bottom: 12px;
  display: block;
}
.scene-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}
.scene-card p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ===== Process Section ===== */
.process-section {
  background: var(--color-bg);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.process-steps::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 60px;
  right: 60px;
  height: 2px;
  background: linear-gradient(90deg, rgba(34,211,238,0.2), rgba(34,211,238,0.6), rgba(34,211,238,0.2));
  z-index: 0;
}
.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 12px;
}
.process-step-dot {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid rgba(34,211,238,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-secondary);
  box-shadow: 0 0 30px rgba(34,211,238,0.1);
  transition: all 0.3s ease;
}
.process-step:hover .process-step-dot {
  border-color: var(--color-secondary);
  box-shadow: 0 0 40px rgba(34,211,238,0.25);
  transform: scale(1.05);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.6;
}

/* ===== Featured Content ===== */
.feat-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.feat-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.feat-card-img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.feat-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.feat-card:hover .feat-card-img img {
  transform: scale(1.06);
}
.feat-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(11,21,48,0.3) 100%);
  pointer-events: none;
}
.feat-card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(6,13,31,0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-secondary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  border: 1px solid rgba(34,211,238,0.3);
  z-index: 2;
}
.feat-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.feat-card-body h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.feat-card-body p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}
.feat-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.feat-card-meta .meta {
  font-size: 13px;
  color: var(--color-text-dim);
}
.feat-card-link {
  color: var(--color-secondary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}
.feat-card-link:hover {
  gap: 8px;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--color-bg-alt);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item:hover {
  border-color: rgba(34,211,238,0.3);
}
.faq-item.active {
  border-color: rgba(34,211,238,0.5);
  box-shadow: 0 0 30px rgba(34,211,238,0.06);
  border-left: 2px solid var(--color-secondary);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  user-select: none;
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(34,211,238,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-secondary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-a-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, #0B1B2B 0%, #0E2440 50%, #0B1530 100%);
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34,211,238,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.cta-section h2 {
  font-size: 34px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}
.cta-section p {
  font-size: 16px;
  color: var(--color-text-sub);
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

/* ===== Related Categories ===== */
.related-section {
  background: var(--color-bg);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  transition: all 0.3s ease;
  display: block;
  position: relative;
  overflow: hidden;
}
.related-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-secondary), transparent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.related-card:hover::before {
  transform: scaleX(1);
}
.related-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.related-card p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.6;
  margin-bottom: 12px;
}
.related-card .link-text {
  font-size: 14px;
  color: var(--color-secondary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}
.related-card .link-text:hover {
  gap: 8px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-sub);
  padding-top: 64px;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-dim);
  max-width: 260px;
}
.footer-col h4,
.footer-newsletter h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: var(--color-text-dim);
  font-size: 14px;
  transition: color 0.3s ease, padding-left 0.3s ease;
}
.footer-col ul li a:hover {
  color: var(--color-secondary);
  padding-left: 4px;
}
.footer-newsletter p {
  font-size: 14px;
  color: var(--color-text-dim);
  margin-bottom: 16px;
  line-height: 1.6;
}
.newsletter-form {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}
.newsletter-form input {
  flex: 1;
  height: 44px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-btn);
  padding: 0 16px;
  color: var(--color-text);
  font-size: 14px;
  transition: all 0.3s ease;
}
.newsletter-form input::placeholder {
  color: var(--color-text-dim);
}
.newsletter-form input:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
  outline: none;
}
.newsletter-form button {
  height: 44px;
  padding: 0 20px;
  background: linear-gradient(135deg, #22D3EE, #0EA5E9);
  color: #0B1B2B;
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius-btn);
  transition: all 0.3s ease;
  white-space: nowrap;
}
.newsletter-form button:hover {
  filter: brightness(1.1);
  box-shadow: var(--shadow-btn);
}
.newsletter-success {
  display: none;
  font-size: 14px;
  color: var(--color-accent);
  align-items: center;
  gap: 6px;
  margin-top: 8px;
}
.newsletter-success.show {
  display: flex;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-dim);
}

/* ===== Floating CTA ===== */
.float-cta {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(11,27,43,0.75);
  border: 1px solid rgba(34,211,238,0.5);
  box-shadow: 0 0 20px rgba(34,211,238,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.float-cta.show {
  opacity: 1;
  pointer-events: auto;
}
.float-cta svg {
  color: var(--color-secondary);
}
.float-cta:hover {
  transform: scale(1.08);
  box-shadow: 0 0 30px rgba(34,211,238,0.5);
  border-color: var(--color-secondary);
}

/* ===== Mobile Drawer ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(6,13,31,0.98);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 90px 32px 120px;
  overflow-y: auto;
}
.mobile-menu-inner a {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color 0.3s ease;
}
.mobile-menu-inner a:hover,
.mobile-menu-inner a.active {
  color: var(--color-secondary);
}
.mobile-menu-inner a:last-of-type {
  border-bottom: none;
}
.mobile-menu-cta {
  margin-top: auto;
  width: 100%;
}

/* ===== Focus Accessibility ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-links, .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .mobile-menu {
    display: block;
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cat-intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .process-steps::before {
    display: none;
  }
  .feat-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }
  .nav-container {
    padding: 0 16px;
    height: 64px;
  }
  .logo-text {
    font-size: 18px;
  }
  .logo-text span {
    font-size: 12px;
  }
  .section {
    padding: var(--space-section-mobile) 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .cat-hero {
    min-height: 60vh;
    padding: 110px 0 60px;
  }
  .cat-hero h1 {
    font-size: 36px;
  }
  .cat-hero-sub {
    font-size: 16px;
  }
  .cat-hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .cat-hero-actions .btn-primary,
  .cat-hero-actions .btn-outline {
    width: 100%;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .scene-grid {
    grid-template-columns: 1fr;
  }
  .feat-cards {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .newsletter-form {
    flex-direction: column;
  }
  .newsletter-form button {
    width: 100%;
  }
  .float-cta {
    right: 16px;
    bottom: 16px;
  }
  .cta-section h2 {
    font-size: 26px;
  }
  .cat-intro-text h3 {
    font-size: 22px;
  }
}