/* roulang page: index */
:root {
  --bg-deep: #070B1A;
  --bg-primary: #0B1026;
  --bg-card: #111A35;
  --accent: #00E5FF;
  --accent-purple: #8B5CF6;
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-muted: rgba(255, 255, 255, 0.35);
  --border-color: rgba(255, 255, 255, 0.08);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glow-accent: 0 0 20px rgba(0, 229, 255, 0.3), 0 0 40px rgba(0, 229, 255, 0.1);
  --glow-accent-strong: 0 0 30px rgba(0, 229, 255, 0.5), 0 0 60px rgba(0, 229, 255, 0.15);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
  object-fit: cover;
  transition: opacity 0.2s ease;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
}

::selection {
  background: rgba(0, 229, 255, 0.3);
  color: #fff;
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #0B1026;
}
::-webkit-scrollbar-thumb {
  background: rgba(0, 229, 255, 0.3);
  border-radius: 4px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding-top: 96px;
  padding-bottom: 96px;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head h2 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-secondary);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  background: rgba(7, 11, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.brand-logo .en {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
  margin-right: 4px;
}

.brand-logo .zh {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a.nav-link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  position: relative;
  padding: 6px 0;
}

.site-nav a.nav-link:hover {
  color: #fff;
  transition: color 0.3s ease;
}

.site-nav a.nav-link.active {
  color: var(--accent);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
}

.site-nav a.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
}

.nav-glow-line {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -1px;
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  pointer-events: none;
}

.nav-cta,
.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  padding: 8px 20px;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.nav-cta {
  background: var(--accent);
  color: #08101a;
  box-shadow: var(--glow-accent);
}

.nav-cta:hover {
  box-shadow: var(--glow-accent-strong);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(7, 11, 26, 0.98);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 24px 24px;
  flex-direction: column;
  gap: 12px;
  z-index: 99;
  backdrop-filter: blur(24px);
}

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

.mobile-menu a {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.mobile-menu a.active {
  color: var(--accent);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
}

.mobile-menu .mobile-cta {
  display: inline-flex;
  justify-content: center;
  background: var(--accent);
  color: #08101a;
  font-weight: 700;
  border-radius: 8px;
  padding: 12px;
  border: none;
  margin-top: 8px;
  box-shadow: var(--glow-accent);
}

/* ===== Hero ===== */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  padding: 120px 24px 80px;
  background:
    linear-gradient(rgba(7, 11, 26, 0.7), rgba(7, 11, 26, 0.95)),
    radial-gradient(circle at 75% 20%, rgba(139, 92, 246, 0.25), transparent 40%),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}

.hero-inner {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero h1 .brand {
  color: var(--accent);
  text-shadow: 0 0 24px rgba(0, 229, 255, 0.5);
}

.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 32px;
  letter-spacing: 0.01em;
}

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

.btn-primary {
  background: var(--accent);
  color: #08101a;
  height: 44px;
  padding: 0 32px;
  border: none;
  box-shadow: var(--glow-accent);
}

.btn-primary:hover {
  box-shadow: var(--glow-accent-strong);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  height: 44px;
  padding: 0 32px;
}

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-2px);
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent);
  animation: bounceDown 2s infinite;
  filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.6));
}

@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.7; }
  50% { transform: translateX(-50%) translateY(6px); opacity: 1; }
}

/* ===== Feature ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.glass-card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--accent);
  filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.4));
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Scene ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scene-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.scene-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.scene-img {
  height: 220px;
  width: 100%;
  overflow: hidden;
}

.scene-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scene-body {
  padding: 24px;
}

.scene-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.scene-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Stats ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 16px rgba(0, 229, 255, 0.4);
  margin-bottom: 8px;
}

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

/* ===== Case ===== */
.case-list {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.case-card {
  display: flex;
  align-items: center;
  gap: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.case-card.reverse {
  flex-direction: row-reverse;
}

.case-image {
  flex: 0 0 40%;
  height: 300px;
  overflow: hidden;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-text {
  flex: 1;
  padding: 32px 32px 32px 0;
}

.case-card.reverse .case-text {
  padding: 32px 0 32px 32px;
}

.case-text h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.case-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== Pricing ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.price-card {
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

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

.price-card.featured {
  border: 1px solid rgba(0, 229, 255, 0.4);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.08);
}

.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #08101a;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 999px;
  box-shadow: var(--glow-accent);
  white-space: nowrap;
}

.price-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.price-amount {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
}

.price-amount .unit {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 400;
  vertical-align: super;
  margin-left: 2px;
}

.price-list {
  flex: 1;
  list-style: none;
  margin-bottom: 32px;
}

.price-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.price-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 7px;
  box-shadow: 0 0 8px rgba(0, 229, 255, 0.6);
}

.price-card .btn-outline,
.price-card .btn-primary {
  width: 100%;
}

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

.news-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.news-head h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.news-more {
  font-size: 14px;
  color: var(--accent);
  padding: 8px 16px;
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 8px;
  transition: all 0.3s ease;
}

.news-more:hover {
  background: rgba(0, 229, 255, 0.08);
  box-shadow: var(--glow-accent);
}

.news-list {
  display: flex;
  flex-direction: column;
}

.news-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background 0.3s ease;
  border-radius: 8px;
}

.news-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

.news-date {
  flex: 0 0 72px;
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.news-month {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.news-year {
  font-size: 12px;
  color: var(--text-muted);
}

.news-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  padding-right: 80px;
}

.news-tag {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 12px;
  color: var(--accent);
  background: rgba(0, 229, 255, 0.1);
  border-radius: 4px;
  padding: 2px 8px;
}

.news-info h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  transition: color 0.3s ease;
}

.news-item:hover .news-info h3 {
  color: var(--accent);
}

.news-info p {
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item.active {
  border-color: rgba(0, 229, 255, 0.25);
}

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

.faq-icon {
  font-size: 24px;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
  transition: transform 0.4s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  text-align: center;
  padding: 96px 24px;
  background:
    radial-gradient(circle at 50% 100%, rgba(139, 92, 246, 0.25), transparent 50%),
    linear-gradient(180deg, #070B1A 0%, #0B1026 100%);
}

.cta-section h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.cta-section .btn-primary {
  padding: 0 48px;
  height: 48px;
  font-size: 15px;
}

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

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

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

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

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  transition: color 0.3s ease;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.footer-contact-item svg {
  flex-shrink: 0;
  color: var(--accent);
}

.footer-copyright {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .site-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-card,
  .case-card.reverse {
    flex-direction: column;
  }
  .case-image {
    flex: 0 0 auto;
    width: 100%;
    height: 260px;
  }
  .case-text,
  .case-card.reverse .case-text {
    padding: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero {
    padding: 100px 16px 64px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .scene-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .price-card.featured {
    transform: scale(1.02);
  }
  .news-item {
    flex-direction: row;
    gap: 16px;
    padding: 20px 12px;
  }
  .news-info {
    padding-right: 0;
  }
  .news-tag {
    position: static;
    display: inline-block;
    align-self: flex-start;
    margin-bottom: 6px;
  }
  .news-info p {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .faq-question {
    font-size: 15px;
    padding: 16px;
  }
  .faq-item.active .faq-answer {
    padding: 0 16px 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .nav-cta {
    display: none;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stat-num {
    font-size: 28px;
  }
  .hero-buttons .btn-primary,
  .hero-buttons .btn-outline {
    width: 100%;
  }
}

/* roulang page: category1 */
:root {
            --bg-page: #070B1A;
            --bg-block: #0B1026;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: #111A35;
            --border-card: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.15);
            --text-primary: rgba(255, 255, 255, 0.95);
            --text-secondary: rgba(255, 255, 255, 0.65);
            --text-muted: rgba(255, 255, 255, 0.35);
            --accent: #00E5FF;
            --accent-purple: #8B5CF6;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.3);
            --glow-btn: 0 0 20px rgba(0, 229, 255, 0.3), 0 0 40px rgba(0, 229, 255, 0.1);
            --glow-hover: 0 0 30px rgba(0, 229, 255, 0.5), 0 0 60px rgba(0, 229, 255, 0.15);
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --section-pad: 96px;
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        ::selection {
            background: rgba(0, 229, 255, 0.3);
            color: #fff;
        }

        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-block);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 229, 255, 0.3);
            border-radius: 4px;
        }

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

        .section {
            padding: var(--section-pad) 0;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
        }

        .accent-text {
            color: var(--accent);
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
        }

        /* ===== Nav ===== */
        .site-nav {
            height: 64px;
            background: rgba(7, 11, 26, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: sticky;
            top: 0;
            z-index: 999;
        }

        .nav-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
        }

        .nav-inner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
        }

        .nav-inner {
            position: relative;
        }

        .brand-logo {
            display: flex;
            align-items: baseline;
            gap: 4px;
        }

        .brand-logo .en {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
            letter-spacing: 0;
        }

        .brand-logo .zh {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-link {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            position: relative;
            padding: 4px 0;
            transition: color 0.3s ease;
        }

        .nav-link:hover {
            color: #fff;
        }

        .nav-link.active {
            color: var(--accent);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent);
        }

        .nav-cta {
            display: inline-block;
            background: var(--accent);
            color: #0B1026;
            font-size: 14px;
            font-weight: 700;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            box-shadow: var(--glow-btn);
            transition: all 0.3s ease;
        }

        .nav-cta:hover {
            box-shadow: var(--glow-hover);
            color: #0B1026;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            padding: 8px;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            transition: all 0.3s ease;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: calc(100vh - 64px);
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 80px 24px;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 11, 26, 0.7) 0%, rgba(7, 11, 26, 0.95) 100%);
        }

        .hero::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .hero .brand-word {
            color: var(--accent);
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
        }

        .hero p.subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            line-height: 1.8;
        }

        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-block;
            background: var(--accent);
            color: #0B1026;
            font-size: 16px;
            font-weight: 700;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            box-shadow: var(--glow-btn);
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }

        .btn-primary:hover {
            box-shadow: var(--glow-hover);
            transform: translateY(-2px);
            color: #0B1026;
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            border-color: rgba(255, 255, 255, 0.35);
            background: rgba(255, 255, 255, 0.04);
        }

        .scroll-arrow {
            position: absolute;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            color: var(--accent);
            animation: bounceArrow 2s infinite;
        }

        @keyframes bounceArrow {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

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

        .info-card {
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .info-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
            background: rgba(255, 255, 255, 0.06);
        }

        .info-card .card-img {
            width: 100%;
            height: 180px;
            overflow: hidden;
        }

        .info-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .info-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .info-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .info-card .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .card-link {
            font-size: 14px;
            color: var(--accent);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.3s ease;
        }

        .card-link:hover {
            color: #fff;
        }

        /* ===== Feature / Scenario ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 48px;
        }

        .scenario-card {
            background: var(--bg-block);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 40px 28px;
            text-align: center;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .scenario-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .scenario-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .scenario-card:hover::before {
            opacity: 1;
        }

        .scenario-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.15);
        }

        .scenario-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 48px;
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.3), transparent);
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .step-num {
            width: 96px;
            height: 96px;
            margin: 0 auto 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
            background: var(--bg-block);
            border: 2px solid rgba(0, 229, 255, 0.4);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.1);
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            max-width: 800px;
            margin: 0 auto;
            margin-top: 48px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            color: var(--text-primary);
            font-weight: 500;
            cursor: pointer;
            transition: color 0.3s ease;
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-icon {
            width: 24px;
            height: 24px;
            color: var(--accent);
            font-size: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.4s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 240px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            text-align: center;
            padding: 80px 24px;
            overflow: hidden;
            background: var(--bg-block);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
        }

        .cta-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .cta-desc {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #070B1A;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 24px;
        }

        .footer-grid {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
        }

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

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 4px 0;
            transition: color 0.3s ease;
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 4px 0;
        }

        .footer-contact-item svg {
            color: var(--accent);
            flex-shrink: 0;
        }

        .footer-copyright {
            max-width: var(--container-max);
            margin: 48px auto 0;
            padding: 24px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }

            .process-grid::before {
                display: none;
            }

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

        @media (max-width: 768px) {
            :root {
                --section-pad: 64px;
            }

            .container {
                padding: 0 16px;
            }

            .nav-links {
                display: none;
            }

            .nav-links.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(7, 11, 26, 0.97);
                backdrop-filter: blur(24px);
                padding: 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-card);
            }

            .nav-links.open .nav-link {
                font-size: 16px;
                padding: 8px 0;
            }

            .menu-toggle {
                display: flex;
            }

            .hero h1 {
                font-size: 32px;
            }

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

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

            .cards-grid,
            .scenario-grid {
                grid-template-columns: 1fr;
            }

            .btn-group {
                flex-direction: column;
                width: 100%;
            }

            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
            }

            .scroll-arrow {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

            .nav-cta {
                display: none;
            }
        }

        @media (min-width: 769px) {
            .nav-links {
                display: flex !important;
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #070B1A;
            --bg-base: #0B1026;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: #111A35;
            --primary: #00E5FF;
            --accent: #8B5CF6;
            --text-main: rgba(255, 255, 255, 0.95);
            --text-muted: rgba(255, 255, 255, 0.65);
            --text-weak: rgba(255, 255, 255, 0.35);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.15);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.3);
            --glow-btn: 0 0 20px rgba(0, 229, 255, 0.3), 0 0 40px rgba(0, 229, 255, 0.1);
            --glow-btn-hover: 0 0 30px rgba(0, 229, 255, 0.5), 0 0 60px rgba(0, 229, 255, 0.15);
            --glow-text: 0 0 20px rgba(0, 229, 255, 0.5);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --container-max: 1200px;
            --space-section: 96px;
            --space-section-md: 64px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        ::selection {
            background: rgba(0, 229, 255, 0.3);
            color: #fff;
        }

        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-base);
        }

        ::-webkit-scrollbar-thumb {
            background: rgba(0, 229, 255, 0.3);
            border-radius: 8px;
        }

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

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

        @media (max-width: 767px) {
            .section {
                padding: var(--space-section-md) 0;
            }
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            background: rgba(7, 11, 26, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 4px;
            font-style: normal;
        }

        .brand-logo .en {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
            letter-spacing: -0.02em;
        }

        .brand-logo .zh {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .site-nav .nav-link {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            font-weight: 400;
            position: relative;
            padding: 6px 0;
            transition: color 0.3s ease;
        }

        .site-nav .nav-link:hover {
            color: #fff;
        }

        .site-nav .nav-link.active {
            color: var(--primary);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
        }

        .site-nav .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .site-nav .nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            background: var(--primary);
            color: #0B1026;
            font-size: 14px;
            font-weight: 700;
            border-radius: 8px;
            box-shadow: var(--glow-btn);
            transition: all 0.3s ease;
        }

        .site-nav .nav-cta:hover {
            box-shadow: var(--glow-btn-hover);
            transform: translateY(-1px);
            color: #0B1026;
        }

        .nav-underline {
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            display: block;
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 64px;
            left: 0;
            right: 0;
            background: rgba(7, 11, 26, 0.97);
            backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
            z-index: 99;
        }

        .mobile-menu a {
            padding: 12px 8px;
            font-size: 15px;
            border-radius: 8px;
            color: rgba(255, 255, 255, 0.8);
        }

        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
        }

        .mobile-menu a.active {
            color: var(--primary);
            background: rgba(0, 229, 255, 0.06);
        }

        @media (max-width: 1023px) {
            .site-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
        }

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

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 11, 26, 0.7) 0%, rgba(7, 11, 26, 0.92) 100%);
        }

        .category-hero::after {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .category-hero h1 {
            font-size: 48px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .category-hero h1 .highlight {
            color: var(--primary);
            text-shadow: var(--glow-text);
        }

        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.7;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 32px;
            background: var(--primary);
            color: #0B1026;
            font-size: 15px;
            font-weight: 700;
            border-radius: 8px;
            box-shadow: var(--glow-btn);
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary:hover {
            box-shadow: var(--glow-btn-hover);
            transform: translateY(-2px);
            color: #0B1026;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 32px;
            background: transparent;
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.04);
            color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 767px) {
            .category-hero h1 {
                font-size: 32px;
            }
            .hero-btns {
                flex-direction: column;
                width: 100%;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
            }
        }

        /* ===== Section Headers ===== */
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header .section-tag {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(0, 229, 255, 0.08);
            padding: 4px 16px;
            border-radius: 999px;
            display: inline-block;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 767px) {
            .section-header h2 {
                font-size: 26px;
            }
        }

        /* ===== Cards Grid ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .content-card {
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

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

        .content-card .card-image {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .content-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .content-card:hover .card-image img {
            transform: scale(1.04);
        }

        .content-card .card-body {
            padding: 20px 24px 24px;
        }

        .content-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
            line-height: 1.4;
        }

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

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

        .content-card .card-link:hover {
            gap: 10px;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
        }

        @media (max-width: 1023px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 767px) {
            .cards-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Feature Section ===== */
        .feature-section {
            background: var(--bg-base);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .feature-item {
            text-align: center;
            padding: 40px 32px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
        }

        .feature-item:hover {
            border-color: rgba(0, 229, 255, 0.2);
            background: rgba(255, 255, 255, 0.03);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 229, 255, 0.08);
            border-radius: 16px;
            color: var(--primary);
        }

        .feature-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

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

        @media (max-width: 1023px) {
            .feature-grid {
                grid-template-columns: 1fr;
                max-width: 520px;
                margin: 0 auto;
            }
        }

        /* ===== Scenario Section ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scenario-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .scenario-card .scenario-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            transition: transform 0.4s ease;
        }

        .scenario-card:hover .scenario-bg {
            transform: scale(1.04);
        }

        .scenario-card::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 0%, rgba(7, 11, 26, 0.85) 100%);
        }

        .scenario-content {
            position: relative;
            z-index: 2;
            padding: 32px;
            width: 100%;
        }

        .scenario-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .scenario-content p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
        }

        @media (max-width: 1023px) {
            .scenario-grid {
                grid-template-columns: 1fr;
                max-width: 520px;
                margin: 0 auto;
            }
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--bg-base);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            position: relative;
        }

        .step-item {
            position: relative;
            text-align: center;
            padding: 40px 24px;
        }

        .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 229, 255, 0.1);
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            border-radius: 50%;
            border: 1px solid rgba(0, 229, 255, 0.25);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.08);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

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

        @media (max-width: 1023px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                max-width: 520px;
                margin: 0 auto;
            }
        }

        /* ===== FAQ ===== */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.12);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            transition: all 0.3s ease;
            user-select: none;
        }

        .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 300;
            color: var(--primary);
            transition: transform 0.4s ease;
            line-height: 1;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        @media (max-width: 767px) {
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            text-align: center;
            background: var(--bg-base);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .cta-section p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

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

        @media (max-width: 767px) {
            .cta-section {
                padding: 64px 0;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 16px;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            transition: color 0.3s ease;
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-contact-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 14px;
            line-height: 1.6;
            word-break: break-all;
        }

        .footer-contact-item svg {
            flex-shrink: 0;
            margin-top: 2px;
            color: var(--primary);
        }

        .footer-copyright {
            text-align: center;
            font-size: 12px;
            color: var(--text-weak);
            padding: 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 767px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

/* roulang page: article */
:root {
            --bg-page: #070B1A;
            --bg-primary: #0B1026;
            --bg-card-solid: #111A35;
            --bg-glass: rgba(255,255,255,0.04);
            --bg-glass-hover: rgba(255,255,255,0.08);
            --accent: #00E5FF;
            --purple: #8B5CF6;
            --white: #ffffff;
            --text-main: rgba(255,255,255,0.95);
            --text-secondary: rgba(255,255,255,0.65);
            --text-muted: rgba(255,255,255,0.35);
            --border-color: rgba(255,255,255,0.08);
            --border-light: rgba(255,255,255,0.15);
            --border-accent: rgba(0,229,255,0.4);
            --shadow-card: 0 4px 24px rgba(0,0,0,0.2);
            --shadow-card-hover: 0 8px 32px rgba(0,0,0,0.3);
            --shadow-glow: 0 0 20px rgba(0,229,255,0.3), 0 0 40px rgba(0,229,255,0.1);
            --shadow-glow-hover: 0 0 30px rgba(0,229,255,0.5), 0 0 60px rgba(0,229,255,0.15);
            --glow-text: 0 0 12px rgba(0,229,255,0.6);
            --glow-brand: 0 0 20px rgba(0,229,255,0.5);
            --gradient-hero: linear-gradient(135deg, rgba(7,11,26,0.65), rgba(7,11,26,0.95));
            --gradient-cta: linear-gradient(135deg, rgba(139,92,246,0.15), rgba(0,229,255,0.1));
            --gradient-header-line: linear-gradient(90deg, transparent, var(--accent), transparent);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--bg-page);
            color: var(--text-main);
            font-family: var(--font-sans);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        select,
        textarea {
            font: inherit;
            color: inherit;
        }

        ::selection {
            background: rgba(0, 229, 255, 0.3);
            color: var(--white);
        }

        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }

        ::-webkit-scrollbar-thumb {
            background: rgba(0, 229, 255, 0.3);
            border-radius: 4px;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: 64px;
            background: rgba(7, 11, 26, 0.85);
            backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border-color);
        }

        .site-header::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: -1px;
            width: 120px;
            height: 2px;
            background: var(--gradient-header-line);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 4px;
            line-height: 1;
        }

        .brand-logo .en {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            text-shadow: var(--glow-brand);
            letter-spacing: -0.02em;
        }

        .brand-logo .zh {
            font-size: 18px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: -0.02em;
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            position: relative;
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--white);
        }

        .nav-link.active {
            color: var(--accent);
            text-shadow: var(--glow-text);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -8px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.6);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: var(--bg-primary);
            font-size: 14px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            padding: 8px 20px;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
        }

        .nav-cta:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        /* 文章头部 */
        .article-hero {
            position: relative;
            padding: 72px 0 48px;
            background: var(--gradient-hero), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }

        .article-hero .container {
            position: relative;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.3s;
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            color: var(--text-muted);
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 260px;
        }

        .article-title {
            font-size: clamp(32px, 5vw, 40px);
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--white);
            line-height: 1.2;
            margin-bottom: 16px;
            max-width: 860px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

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

        .meta-category {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(0, 229, 255, 0.1);
            border-radius: 4px;
            padding: 3px 10px;
            transition: all 0.3s;
        }

        .meta-category:hover {
            background: rgba(0, 229, 255, 0.2);
        }

        /* 正文 */
        .article-body {
            padding: 64px 0;
        }

        .article-content {
            max-width: 720px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-main);
        }

        .article-content p {
            margin-bottom: 24px;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 40px 0 16px;
            color: var(--white);
            letter-spacing: -0.02em;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            margin: 32px 0 12px;
            color: var(--white);
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 24px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 24px 0;
            background: rgba(0, 229, 255, 0.04);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content pre {
            background: var(--bg-primary);
            color: #e2e8f0;
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin-bottom: 24px;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-content code {
            font-family: "SFMono-Regular", Consolas, monospace;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            width: 100%;
            height: auto;
        }

        .not-found {
            text-align: center;
            padding: 64px 0;
        }

        .not-found p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 32px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 700;
            transition: all 0.3s ease;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--bg-primary);
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
        }

        .btn-glass {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--white);
        }

        .btn-glass:hover {
            border-color: rgba(255, 255, 255, 0.3);
            background: var(--bg-glass);
        }

        /* 相关推荐 */
        .related-section {
            padding: 64px 0 80px;
            background: var(--bg-primary);
        }

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

        .section-head h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: -0.02em;
        }

        .section-head p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

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

        .related-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            backdrop-filter: blur(24px);
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }

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

        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .related-card-body {
            padding: 20px 24px 24px;
        }

        .related-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 8px;
        }

        .related-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .card-more {
            font-size: 14px;
            color: var(--accent);
        }

        .article-actions {
            margin-top: 48px;
            text-align: center;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            text-align: center;
            background: var(--gradient-cta), var(--bg-page);
        }

        .cta-section h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        /* 页脚 */
        .site-footer {
            background: var(--bg-page);
            border-top: 1px solid var(--border-color);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 48px;
        }

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

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 2.2;
            transition: color 0.3s;
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 2.2;
        }

        .footer-contact-item svg {
            flex-shrink: 0;
            color: var(--accent);
        }

        .footer-copyright {
            border-top: 1px solid var(--border-color);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 响应式 */
        @media (max-width: 1023px) {
            .site-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(7, 11, 26, 0.97);
                backdrop-filter: blur(24px);
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-color);
                gap: 16px;
                display: none;
            }

            .site-nav.open {
                display: flex;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-link.active::after {
                display: none;
            }

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

            .related-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin-left: auto;
                margin-right: auto;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }

            .article-hero {
                padding: 48px 0 32px;
            }

            .article-title {
                font-size: 32px;
            }

            .article-body {
                padding: 48px 0;
            }

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

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

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

            .cta-section h2 {
                font-size: 20px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #070B1A;
            --bg-base: #0B1026;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: #111A35;
            --primary: #00E5FF;
            --accent: #8B5CF6;
            --text-main: rgba(255, 255, 255, 0.95);
            --text-muted: rgba(255, 255, 255, 0.65);
            --text-weak: rgba(255, 255, 255, 0.35);
            --border: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.15);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.3);
            --glow-primary: 0 0 20px rgba(0, 229, 255, 0.3), 0 0 40px rgba(0, 229, 255, 0.1);
            --glow-primary-hover: 0 0 30px rgba(0, 229, 255, 0.5), 0 0 60px rgba(0, 229, 255, 0.15);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

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

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

        ::selection {
            background: rgba(0, 229, 255, 0.3);
            color: #fff;
        }

        ::-webkit-scrollbar {
            width: 8px;
            background: var(--bg-base);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 229, 255, 0.3);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 229, 255, 0.5);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(7, 11, 26, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header-inner {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .nav-glow-line {
            height: 2px;
            width: 120px;
            margin: 0 auto;
            background: linear-gradient(90deg, transparent, #00E5FF, transparent);
            position: relative;
            z-index: 101;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }
        .brand-logo .en {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
            letter-spacing: -0.02em;
        }
        .brand-logo .zh {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            flex-shrink: 0;
        }

        .nav-link {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            position: relative;
            padding: 6px 2px;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link.active {
            color: var(--primary);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .nav-cta {
            font-size: 14px;
            font-weight: 700;
            color: #070B1A;
            background: var(--primary);
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            box-shadow: var(--glow-primary);
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .nav-cta:hover {
            box-shadow: var(--glow-primary-hover);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
        }
        .nav-toggle span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            min-height: 320px;
            display: flex;
            align-items: center;
            padding: 140px 0 80px;
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 11, 26, 0.7), rgba(7, 11, 26, 0.95));
            z-index: 1;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            top: -80px;
            right: -100px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
            z-index: 1;
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .crumb {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .crumb a {
            color: var(--text-muted);
        }
        .crumb a:hover {
            color: var(--primary);
        }
        .crumb span {
            color: var(--text-weak);
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .category-hero p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 32px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: #070B1A;
            box-shadow: var(--glow-primary);
        }
        .btn-primary:hover {
            box-shadow: var(--glow-primary-hover);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
        }
        .btn-secondary:hover {
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.04);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        /* ===== Section ===== */
        .section {
            padding: 96px 0;
        }
        .section-alt {
            background: var(--bg-base);
        }

        .section-head {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-head h2 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-head p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== Type Cards 2x2 ===== */
        .type-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .type-card {
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .type-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.05);
        }

        .type-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(0, 229, 255, 0.1);
            margin-bottom: 20px;
            color: var(--primary);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
        }

        .type-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .type-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Promo Cards 3x3 ===== */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .promo-card {
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .promo-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 255, 255, 0.15);
        }

        .promo-card .cover {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-card-hover);
            transition: all 0.3s ease;
        }
        .promo-card:hover .cover {
            opacity: 0.9;
        }

        .promo-card-body {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .promo-card-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .promo-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }

        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link:hover {
            color: #fff;
        }
        .card-link .arrow {
            transition: transform 0.3s ease;
        }
        .card-link:hover .arrow {
            transform: translateX(4px);
        }

        /* ===== Stats ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 40px 24px;
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .stat-item:hover {
            border-color: rgba(0, 229, 255, 0.2);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .process-step {
            text-align: center;
            padding: 40px 24px;
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            position: relative;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            width: 44px;
            height: 44px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.25);
            color: var(--primary);
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.1);
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            transition: all 0.4s ease;
            overflow: hidden;
        }
        .faq-item.open {
            border-color: rgba(0, 229, 255, 0.15);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            color: #fff;
            font-weight: 500;
            cursor: pointer;
            user-select: none;
            transition: all 0.3s ease;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
            font-weight: 400;
            transition: transform 0.4s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: var(--bg-base);
            overflow: hidden;
            text-align: center;
            padding: 96px 0;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -120px;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 400px;
            background: radial-gradient(ellipse, rgba(0, 229, 255, 0.1), rgba(139, 92, 246, 0.08), transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .cta-section p {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 36px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-top: 16px;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            line-height: 1.5;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            line-height: 1.5;
            word-break: break-all;
        }
        .footer-contact-item svg {
            color: var(--primary);
            flex-shrink: 0;
        }
        .footer-copyright {
            text-align: center;
            font-size: 12px;
            color: var(--text-weak);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            margin-top: 48px;
            padding: 24px 16px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .site-nav {
                position: fixed;
                top: 64px;
                left: 0;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background: rgba(7, 11, 26, 0.97);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                padding: 16px 24px 24px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.4s ease;
                z-index: 99;
            }
            .site-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .site-nav .nav-link {
                display: block;
                width: 100%;
                padding: 14px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            }
            .site-nav .nav-link.active::after {
                display: none;
            }
            .site-nav .nav-cta {
                display: inline-flex;
                margin-top: 16px;
                width: auto;
            }
            .nav-toggle {
                display: flex;
            }
            .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);
            }
            .promo-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section {
                padding: 64px 0;
            }
            .category-hero {
                min-height: 280px;
                padding: 120px 0 60px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .type-grid {
                grid-template-columns: 1fr;
            }
            .promo-grid {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item {
                padding: 28px 16px;
            }
            .stat-number {
                font-size: 28px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .cta-section {
                padding: 64px 0;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category4 */
:root {
  --bg-deep: #070B1A;
  --bg-primary: #0B1026;
  --bg-card: #111A35;
  --accent-cyan: #00E5FF;
  --accent-purple: #8B5CF6;
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-muted: rgba(255, 255, 255, 0.35);
  --border-glass: rgba(255, 255, 255, 0.08);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glow-cyan: 0 0 20px rgba(0, 229, 255, 0.3), 0 0 40px rgba(0, 229, 255, 0.1);
  --glow-cyan-hover: 0 0 30px rgba(0, 229, 255, 0.5), 0 0 60px rgba(0, 229, 255, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
  object-fit: cover;
  transition: opacity 0.2s ease;
}

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

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

input, textarea {
  font-family: inherit;
}

::selection {
  background: rgba(0, 229, 255, 0.3);
  color: #fff;
}

::-webkit-scrollbar {
  width: 8px;
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(0, 229, 255, 0.3);
  border-radius: 4px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-block {
  padding: 96px 0;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  text-align: center;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

/* ===== 导航 ===== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(7, 11, 26, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-nav::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, transparent, #00E5FF, transparent);
  pointer-events: none;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0;
}

.brand-logo .en {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-cyan);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
  letter-spacing: -0.02em;
}

.brand-logo .zh {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 64px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  border-bottom: 2px solid transparent;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: #fff;
}

.nav-link.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 20px;
  background: var(--accent-cyan);
  color: var(--bg-primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  box-shadow: var(--glow-cyan);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.nav-cta:hover {
  box-shadow: var(--glow-cyan-hover);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.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);
}

/* ===== Hero ===== */
.category-hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
}

.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 26, 0.7) 0%, rgba(7, 11, 26, 0.95) 100%);
}

.category-hero::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.2), transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.3s ease;
}

.breadcrumb a:hover {
  color: var(--accent-cyan);
}

.breadcrumb .sep {
  color: rgba(255, 255, 255, 0.2);
}

.category-hero h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
}

.category-hero .brand-glow {
  color: var(--accent-cyan);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
}

.category-hero .hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 32px;
  background: var(--accent-cyan);
  color: var(--bg-primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  box-shadow: var(--glow-cyan);
  transition: all 0.3s ease;
}

.btn-primary:hover {
  box-shadow: var(--glow-cyan-hover);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 32px;
  background: transparent;
  color: #fff;
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  transition: all 0.3s ease;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.04);
}

.scroll-down {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent-cyan);
  animation: floatDown 2s ease-in-out infinite;
  z-index: 2;
}

@keyframes floatDown {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 4px); }
}

/* ===== 服务卡片网格 ===== */
.services-grid {
  background: var(--bg-primary);
}

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

.grid-card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.grid-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.grid-card .card-img {
  width: 100%;
  height: 180px;
  overflow: hidden;
}

.grid-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.grid-card:hover .card-img img {
  transform: scale(1.03);
}

.card-body {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}

.card-link {
  font-size: 14px;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}

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

/* ===== 数据指标 ===== */
.stats-section {
  background: var(--bg-deep);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.stat-item:hover {
  border-color: rgba(0, 229, 255, 0.2);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-cyan);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
  line-height: 1.2;
  margin-bottom: 8px;
}

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

/* ===== 图文交替 ===== */
.text-image-section {
  background: var(--bg-primary);
}

.text-image-grid {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.text-image-item {
  display: flex;
  align-items: center;
  gap: 48px;
}

.text-image-item.reverse {
  flex-direction: row-reverse;
}

.text-image-media {
  width: 40%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
}

.text-image-media img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.text-image-media:hover img {
  transform: scale(1.02);
}

.text-image-content {
  flex: 1;
}

.text-image-content h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.text-image-content h3 .accent {
  color: var(--accent-cyan);
}

.text-image-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.15);
  border-radius: 999px;
}

/* ===== 服务流程 ===== */
.process-section {
  background: var(--bg-deep);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-step {
  padding: 28px 24px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  text-align: center;
  position: relative;
  transition: border-color 0.3s ease;
}

.process-step:hover {
  border-color: rgba(0, 229, 255, 0.2);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--accent-cyan);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.process-step h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-primary);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

.faq-item.active {
  border-color: rgba(0, 229, 255, 0.2);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  color: #fff;
  font-weight: 500;
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  line-height: 1;
  transition: transform 0.4s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(0, 229, 255, 0.06)), var(--bg-primary);
  text-align: center;
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.1), transparent 65%);
  pointer-events: none;
}

.cta-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.cta-section .btn-primary {
  position: relative;
  z-index: 1;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  transition: color 0.3s ease;
}

.footer-col a:hover {
  color: var(--accent-cyan);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  line-height: 1.5;
}

.footer-contact-item svg {
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(7, 11, 26, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 16px 24px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: none;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.3);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    height: auto;
    padding: 14px 0;
    border-bottom: none;
    width: 100%;
    font-size: 15px;
  }

  .nav-link.active {
    border-bottom: none;
  }

  .nav-cta {
    margin-top: 16px;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .text-image-item,
  .text-image-item.reverse {
    flex-direction: column;
    gap: 24px;
  }

  .text-image-media {
    width: 100%;
  }

  .text-image-content {
    text-align: left;
  }

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }

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

  .section-title {
    font-size: 24px;
  }

  .section-subtitle {
    font-size: 14px;
    margin-bottom: 32px;
  }

  .category-hero {
    min-height: 55vh;
    padding: 100px 0 60px;
  }

  .category-hero h1 {
    font-size: 32px;
  }

  .category-hero .hero-desc {
    font-size: 14px;
    padding: 0 8px;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

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

  .stat-num {
    font-size: 28px;
  }

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

  .text-image-media img {
    min-height: 200px;
  }

  .faq-question {
    padding: 16px 16px;
    font-size: 14px;
  }

  .faq-answer-inner {
    padding: 0 16px 16px;
    font-size: 13px;
  }

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

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

  .btn-primary,
  .btn-ghost {
    width: 100%;
    max-width: 280px;
  }

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

  .footer-brand p {
    max-width: 100%;
  }

  .scroll-down {
    display: none;
  }
}

@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .text-image-content h3 {
    font-size: 20px;
  }
}