/* roulang page: index */
/* ========== Design Variables ========== */
:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --cyan: #06b6d4;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-dark: #0b1120;
  --text: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --border-dark: #1e293b;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --space-section: 100px;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--primary);
}

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

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(245, 158, 11, 0.1);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-head h2 {
  font-size: clamp(30px, 4vw, 42px);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-head p {
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.8;
}

.section-light {
  background: var(--bg-soft);
}

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

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: 999px;
  transition: all .3s ease;
  line-height: 1.4;
}

.btn-primary {
  background: var(--accent);
  color: #0f172a;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245, 158, 11, 0.4);
}

.btn-outline {
  border: 2px solid rgba(255, 255, 255, 0.8);
  color: #fff;
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(245, 158, 11, 0.08);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--primary);
  color: #fff;
}

.btn-dark:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn:focus-visible {
  outline: 3px solid rgba(245, 158, 11, 0.5);
  outline-offset: 3px;
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.logo .logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.15);
}

.logo:hover .logo-dot {
  background: var(--accent-hover);
  box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.2);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: 999px;
  position: relative;
  transition: color .25s, background .25s;
}

.main-nav .nav-link:hover {
  color: var(--primary);
  background: rgba(15, 23, 42, 0.04);
}

.main-nav .nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.main-nav .nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.05);
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  transition: background .2s;
}

.nav-toggle:hover {
  background: rgba(15, 23, 42, 0.1);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(11, 17, 32, 0.88) 0%, rgba(15, 23, 42, 0.76) 50%, rgba(30, 41, 59, 0.82) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  padding: 100px 0;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, #fff, transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.2); }
  50% { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0.05); }
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 58px);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero h1 .highlight {
  background: linear-gradient(120deg, var(--accent), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 36px;
  max-width: 560px;
}

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

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 60px;
  flex-wrap: wrap;
}

.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.hero-stat .num span {
  color: var(--accent);
}

.hero-stat .label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 4px;
}

/* ========== Feature Cards ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: all .35s ease;
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(245, 158, 11, 0.4);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}

.feature-icon.n1 { background: rgba(245, 158, 11, 0.12); color: var(--accent); }
.feature-icon.n2 { background: rgba(6, 182, 212, 0.12); color: var(--cyan); }
.feature-icon.n3 { background: rgba(74, 222, 128, 0.12); color: #22c55e; }
.feature-icon.n4 { background: rgba(99, 102, 241, 0.12); color: #6366f1; }

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

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

.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: block;
  box-shadow: var(--shadow);
  transition: all .35s ease;
  background: var(--bg);
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.category-card .card-cover {
  height: 220px;
  overflow: hidden;
  position: relative;
}

.category-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}

.category-card:hover .card-cover img {
  transform: scale(1.06);
}

.category-card .card-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.85), transparent 60%);
}

.category-card .card-body {
  padding: 24px 24px 28px;
  position: relative;
  background: var(--bg);
}

.category-card .card-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.category-card .card-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}

.category-card .card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.category-card .card-meta i {
  transition: transform .3s;
}

.category-card:hover .card-meta i {
  transform: translateX(4px);
}

.card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 0.03em;
}

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

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

.news-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all .35s ease;
  display: block;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(245, 158, 11, 0.35);
}

.news-card .news-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.news-cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(245, 158, 11, 0.1);
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

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

.news-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--text);
  transition: color .25s;
}

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

.news-card .news-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
  font-size: 16px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.section-more {
  text-align: center;
  margin-top: 40px;
}

/* ========== Stats Section ========== */
.stats-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: "9";
  position: absolute;
  right: -40px;
  top: -60px;
  font-size: 280px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.04);
  line-height: 1;
  pointer-events: none;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  position: relative;
  z-index: 2;
}

.stat-item {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all .3s;
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(245, 158, 11, 0.3);
  transform: translateY(-4px);
}

.stat-item .stat-num {
  font-size: 44px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-item .stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
}

.stat-item .stat-sub {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 4px;
}

/* ========== Steps Section ========== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}

.step-card {
  position: relative;
  padding: 32px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .3s;
}

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

.step-card::before {
  counter-increment: step;
  content: "0" counter(step);
  font-size: 40px;
  font-weight: 900;
  color: rgba(15, 23, 42, 0.06);
  line-height: 1;
  display: block;
  margin-bottom: 16px;
  font-family: Georgia, serif;
}

.step-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

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

.step-line {
  position: absolute;
  top: 50%;
  right: -14px;
  width: 28px;
  height: 1px;
  background: var(--border);
}

.step-card:last-child .step-line { display: none; }

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

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow .3s, border-color .3s;
}

.faq-item:hover {
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: var(--shadow);
}

.faq-item summary {
  padding: 22px 28px;
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color .3s;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 14px;
  color: var(--text-light);
  transition: transform .3s, color .3s;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-item[open] summary {
  color: var(--accent-hover);
}

.faq-item .faq-body {
  padding: 0 28px 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ========== CTA Section ========== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(11, 17, 32, 0.9), rgba(30, 41, 59, 0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  position: relative;
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(28px, 4vw, 40px);
  color: #fff;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 36px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
  color: #fff;
  font-size: 20px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  max-width: 260px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  transition: color .25s, padding-left .25s;
}

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

.footer-contact p {
  font-size: 14px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-contact p i {
  color: var(--accent);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom .brand-line {
  color: rgba(255, 255, 255, 0.5);
}

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

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

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

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    box-shadow: 0 24px 40px rgba(15, 23, 42, 0.1);
    border-radius: 0 0 20px 20px;
  }

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

  .main-nav .nav-link {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
  }

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

  .main-nav .nav-link.active {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-hover);
    border-radius: 10px;
  }

  .nav-toggle {
    display: flex;
  }

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

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

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

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

  .step-line { display: none; }

  .hero {
    min-height: 520px;
    padding: 72px 0;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat .num {
    font-size: 24px;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .nav-container {
    padding: 0 16px;
  }

  .container {
    padding: 0 16px;
  }

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

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-item {
    padding: 20px 12px;
  }

  .stat-item .stat-num {
    font-size: 32px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .news-card {
    padding: 20px;
  }

  .cta-section p {
    font-size: 15px;
  }
}

/* ========== Accessibility ========== */
a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(245, 158, 11, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

/* roulang page: category1 */
:root {
  --primary: #1f2a44;
  --primary-light: #2d3a5e;
  --accent: #ff8a3d;
  --accent-dark: #f06a1a;
  --bg: #f6f7fb;
  --card-bg: #ffffff;
  --text: #17203a;
  --text-muted: #7a819b;
  --border: #e6e9f2;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 12px 32px rgba(23, 32, 58, 0.08);
  --shadow-hover: 0 20px 44px rgba(23, 32, 58, 0.14);
  --transition: all 0.3s ease;
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
}
ul {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input {
  font-family: inherit;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.18);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 999px;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--text);
  background: rgba(31, 42, 68, 0.04);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  background: var(--bg);
  transition: var(--transition);
}
.nav-toggle:hover {
  background: var(--border);
}

/* Hero */
.page-hero {
  position: relative;
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center;
  padding: 108px 0 96px;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15, 22, 44, 0.92) 20%, rgba(20, 30, 60, 0.68) 70%, rgba(30, 38, 70, 0.45) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: rgba(255, 138, 61, 0.16);
  border: 1px solid rgba(255, 138, 61, 0.36);
  color: #ffb37d;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.06em;
  margin-bottom: 24px;
}
.hero-title {
  color: #fff;
  font-size: 46px;
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: 0.01em;
  margin-bottom: 18px;
}
.hero-subtitle {
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn i {
  font-size: 14px;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(255, 138, 61, 0.28);
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(240, 106, 26, 0.32);
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 36px;
}
.meta-item {
  display: flex;
  align-items: center;
  gap: 14px;
}
.meta-item i {
  font-size: 22px;
  color: var(--accent);
}
.meta-num {
  display: block;
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.meta-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* Section */
.section {
  padding: 96px 0;
}
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 138, 61, 0.1);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
  border-radius: 999px;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.section-title {
  font-size: 34px;
  line-height: 1.32;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 14px;
}
.section-desc {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
}

/* Hot list */
.hot-section {
  background: var(--bg);
}
.hot-list {
  display: grid;
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}
.hot-card {
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.hot-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent);
  opacity: 0;
  transition: var(--transition);
}
.hot-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 138, 61, 0.28);
}
.hot-card:hover::before {
  opacity: 1;
}
.hot-index {
  font-size: 40px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--primary);
  line-height: 1;
  min-width: 56px;
  text-align: center;
  opacity: 0.5;
}
.hot-card:first-child .hot-index {
  color: var(--accent);
  -webkit-text-stroke: 0;
  opacity: 1;
}
.hot-info {
  flex: 1;
  min-width: 0;
}
.hot-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.5;
}
.hot-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}
.badge-hot {
  background: rgba(255, 83, 88, 0.12);
  color: #ff5358;
}
.badge-new {
  background: rgba(50, 180, 120, 0.12);
  color: #23a76d;
}
.badge-topic {
  background: rgba(31, 42, 68, 0.06);
  color: var(--primary-light);
}
.hot-bar {
  height: 6px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), #ffc26d);
}
.hot-score {
  margin-left: auto;
  text-align: right;
  min-width: 90px;
}
.hot-score strong {
  display: block;
  font-size: 22px;
  color: var(--text);
  line-height: 1.2;
}
.hot-score span {
  font-size: 12px;
  color: var(--text-muted);
}

/* Topics */
.topics-section {
  background: var(--card-bg);
}
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.topic-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 260px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: block;
}
.topic-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.topic-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.topic-card:hover .topic-media {
  transform: scale(1.05);
}
.topic-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 22, 44, 0.1) 20%, rgba(15, 22, 44, 0.8) 100%);
}
.topic-info {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 22px;
  z-index: 2;
  color: #fff;
}
.topic-info .badge {
  background: rgba(255, 138, 61, 0.9);
  color: #fff;
  margin-bottom: 10px;
}
.topic-info h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}
.topic-info p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
}

/* Feature */
.feature-section {
  background: var(--bg);
}
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.feature-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
}
.feature-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 138, 61, 0.22), transparent 60%);
  z-index: 1;
}
.feature-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.feature-content {
  padding: 20px 0;
}
.feature-content .section-tag {
  background: rgba(255, 138, 61, 0.1);
  color: var(--accent-dark);
}
.feature-content h3 {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text);
  margin-bottom: 16px;
}
.feature-content > p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.step-list {
  display: grid;
  gap: 20px;
}
.step-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  box-shadow: 0 6px 16px rgba(31, 42, 68, 0.2);
}
.step-num.step-done {
  background: var(--accent);
}
.step-body strong {
  display: block;
  font-size: 16px;
  color: var(--text);
  margin-bottom: 4px;
}
.step-body span {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Latest */
.latest-section {
  background: var(--card-bg);
}
.latest-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 44px;
  align-items: start;
}
.guide-list {
  display: grid;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card-bg);
  box-shadow: var(--shadow);
}
.guide-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.guide-item:last-child {
  border-bottom: none;
}
.guide-item:hover {
  background: rgba(255, 138, 61, 0.04);
}
.guide-ico {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(31, 42, 68, 0.06);
  color: var(--primary);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.guide-main {
  flex: 1;
  min-width: 0;
}
.guide-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.guide-meta .badge {
  font-size: 11px;
}
.guide-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.guide-item:hover .guide-title {
  color: var(--accent-dark);
}
.guide-date {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}
.update-calendar {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.cal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.cal-head h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.cal-head i {
  color: var(--accent);
  font-size: 20px;
}
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}
.cal-day {
  text-align: center;
  padding: 12px 4px;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 1px solid transparent;
  transition: var(--transition);
}
.cal-day .week {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.cal-day .num {
  display: block;
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
}
.cal-day.has-update {
  background: rgba(255, 138, 61, 0.08);
  border-color: rgba(255, 138, 61, 0.22);
}
.cal-day.has-update .num {
  color: var(--accent-dark);
}
.cal-day .label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}
.cal-note {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.cal-note i {
  color: var(--accent);
}

/* FAQ */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(255, 138, 61, 0.24);
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary i {
  font-size: 15px;
  color: var(--accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] summary i {
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 26px 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* CTA */
.cta-section {
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}
.cta-box {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  padding: 96px 24px;
}
.cta-title {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-desc {
  color: rgba(255, 255, 255, 0.72);
  font-size: 16px;
  margin-bottom: 36px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* Footer */
.site-footer {
  background: #171e36;
  color: rgba(255, 255, 255, 0.68);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .logo .logo-dot {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.25);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.9;
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
}
.footer-col ul {
  display: grid;
  gap: 12px;
}
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul li a:hover {
  color: var(--accent);
  transform: translateX(4px);
}
.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.62);
}
.footer-contact p i {
  color: var(--accent);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}
.brand-line {
  color: rgba(255, 138, 61, 0.8);
  letter-spacing: 0.04em;
}

/* Responsive */
@media (max-width: 1024px) {
  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .feature-media img {
    height: 340px;
  }
  .latest-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 6px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: 0 24px 40px rgba(23, 32, 58, 0.1);
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-link {
    width: 100%;
    padding: 12px 16px;
  }
  .nav-link.active::after {
    left: 16px;
    right: auto;
    width: 24px;
  }
  .hero-title {
    font-size: 34px;
  }
  .section-title {
    font-size: 28px;
  }
  .section {
    padding: 64px 0;
  }
  .hot-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
  }
  .hot-score {
    margin-left: 0;
    text-align: left;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .hot-score strong {
    font-size: 18px;
  }
  .hot-index {
    font-size: 32px;
  }
  .cal-grid {
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
  }
  .cal-day {
    padding: 10px 2px;
  }
  .cal-day .label {
    display: none;
  }
  .cta-title {
    font-size: 28px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .nav-container {
    padding: 0 16px;
  }
  .logo {
    font-size: 18px;
  }
  .hero-content {
    padding: 0 4px;
  }
  .hero-title {
    font-size: 28px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    justify-content: center;
  }
  .hero-meta {
    gap: 22px;
  }
  .meta-num {
    font-size: 20px;
  }
  .meta-label {
    font-size: 12px;
  }
  .section {
    padding: 52px 0;
  }
  .section-title {
    font-size: 24px;
  }
  .section-desc {
    font-size: 15px;
  }
  .topics-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .topic-card {
    height: 220px;
  }
  .feature-media img {
    height: 240px;
  }
  .feature-content h3 {
    font-size: 24px;
  }
  .guide-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 18px;
  }
  .guide-main {
    width: 100%;
  }
  .guide-date {
    align-self: flex-end;
  }
  .cal-day .week {
    font-size: 11px;
  }
  .cal-day .num {
    font-size: 15px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .cta-box {
    padding: 64px 16px;
  }
  .faq-item summary {
    padding: 18px 20px;
    font-size: 15px;
  }
  .faq-answer {
    padding: 0 20px 20px;
    font-size: 14px;
  }
}

/* roulang page: article */
:root {
            --primary: #1d4ed8;
            --primary-dark: #1e3a8a;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-body: #f1f5f9;
            --bg-deep: #0f172a;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-body: #334155;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, .08);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, .12);
            --space: 84px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-md);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

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

        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            transition: all .25s ease;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(29, 78, 216, .25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(29, 78, 216, .32);
        }

        .btn-light {
            background: #fff;
            color: var(--primary-dark);
            border-color: #fff;
        }

        .btn-light:hover {
            background: rgba(255, 255, 255, .9);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
        }

        .btn-glass {
            background: rgba(255, 255, 255, .12);
            color: #fff;
            border-color: rgba(255, 255, 255, .6);
            backdrop-filter: blur(4px);
        }

        .btn-glass:hover {
            background: rgba(255, 255, 255, .24);
            color: #fff;
            transform: translateY(-2px);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1.5;
            background: rgba(29, 78, 216, .08);
            color: var(--primary);
        }

        .badge-hot {
            background: rgba(245, 158, 11, .14);
            color: #b45309;
        }

        .badge-new {
            background: rgba(16, 185, 129, .14);
            color: #047857;
        }

        .tag-item {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            background: var(--bg-body);
            color: var(--text-weak);
            border: 1px solid var(--border);
            transition: all .2s ease;
        }

        .tag-item:hover {
            background: rgba(29, 78, 216, .08);
            color: var(--primary);
            border-color: rgba(29, 78, 216, .2);
        }

        .empty-state {
            padding: 40px 20px;
            text-align: center;
            color: var(--text-weak);
            font-size: 15px;
            border: 1px dashed var(--border);
            border-radius: var(--radius-md);
            background: #fafbfc;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
        }

        .nav-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 28px;
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: .5px;
            white-space: nowrap;
        }

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

        .logo-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            box-shadow: 0 0 0 4px rgba(29, 78, 216, .12);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 999px;
            transition: color .2s ease, background .2s ease;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(29, 78, 216, .05);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(29, 78, 216, .08);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 12px;
            height: 3px;
            border-radius: 99px;
            background: var(--accent);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            font-size: 18px;
            color: var(--text-main);
            background: var(--bg-body);
            align-items: center;
            justify-content: center;
            transition: background .2s ease;
        }

        .nav-toggle:hover {
            background: rgba(29, 78, 216, .1);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 96px 0 76px;
            background:
                linear-gradient(135deg, rgba(15, 23, 42, .94), rgba(30, 58, 138, .88)),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
        }

        .article-hero-inner {
            max-width: 860px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
            margin-bottom: 22px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, .75);
            transition: color .2s ease;
        }

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

        .breadcrumb span {
            color: rgba(255, 255, 255, .4);
        }

        .breadcrumb .current {
            color: var(--accent-light);
            font-weight: 600;
        }

        .article-title {
            font-size: clamp(28px, 4.2vw, 44px);
            line-height: 1.3;
            font-weight: 800;
            letter-spacing: .5px;
            margin-bottom: 22px;
            color: #fff;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 14px;
            color: rgba(255, 255, 255, .72);
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-item i {
            font-size: 13px;
            color: var(--accent-light);
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            background: rgba(245, 158, 11, .18);
            color: var(--accent-light);
            border: 1px solid rgba(245, 158, 11, .35);
        }

        /* ===== Article Main ===== */
        .article-main-section {
            padding: var(--space) 0;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 48px;
            align-items: start;
        }

        .article-content-area {
            min-width: 0;
        }

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
        }

        .article-cover {
            position: relative;
            height: 360px;
            overflow: hidden;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        .article-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, .28), transparent 60%);
        }

        .cover-badge {
            position: absolute;
            top: 20px;
            left: 20px;
            z-index: 2;
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            background: rgba(255, 255, 255, .18);
            backdrop-filter: blur(8px);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .25);
        }

        .article-content-html {
            padding: 40px 44px;
            font-size: 16.5px;
            line-height: 1.9;
            color: var(--text-body);
        }

        .article-content-html h2 {
            font-size: 24px;
            color: var(--text-main);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(29, 78, 216, .12);
            font-weight: 700;
        }

        .article-content-html h3 {
            font-size: 20px;
            color: var(--text-main);
            margin: 28px 0 12px;
            font-weight: 700;
        }

        .article-content-html p {
            margin-bottom: 18px;
        }

        .article-content-html img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-md);
        }

        .article-content-html ul,
        .article-content-html ol {
            margin: 0 0 18px 24px;
        }

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

        .article-content-html blockquote {
            border-left: 4px solid var(--accent);
            background: #fffbeb;
            padding: 16px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 20px 0;
            color: #92400e;
            font-style: italic;
        }

        .article-content-html a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .not-found {
            padding: 90px 40px;
            text-align: center;
        }

        .not-found i {
            font-size: 56px;
            color: var(--primary-light);
            margin-bottom: 20px;
            display: inline-block;
        }

        .not-found h3 {
            font-size: 28px;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-weak);
            margin-bottom: 28px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 20px 0 0;
            margin-top: 8px;
        }

        .article-tags i {
            color: var(--text-weak);
            font-size: 14px;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .side-widget {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 26px;
            border: 1px solid rgba(226, 232, 240, .7);
        }

        .side-widget h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--bg-body);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-widget h4::before {
            content: '';
            width: 4px;
            height: 18px;
            border-radius: 99px;
            background: var(--accent);
        }

        .info-widget ul {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }

        .info-widget li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 14px;
        }

        .info-widget li:last-child {
            border-bottom: none;
        }

        .info-widget li span {
            color: var(--text-weak);
        }

        .info-widget li em {
            font-style: normal;
            font-weight: 600;
            color: var(--text-main);
        }

        .widget-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .hot-track {
            height: 6px;
            border-radius: 99px;
            background: var(--bg-body);
            margin: 14px 0;
            overflow: hidden;
        }

        .hot-track-fill {
            height: 100%;
            border-radius: 99px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
        }

        .hot-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hot-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px;
            border-radius: var(--radius-md);
            transition: background .2s ease;
        }

        .hot-item:hover {
            background: var(--bg-body);
        }

        .hot-index {
            font-size: 20px;
            font-weight: 800;
            color: var(--border);
            font-style: italic;
            min-width: 34px;
        }

        .hot-item:nth-child(1) .hot-index {
            color: var(--accent);
        }

        .hot-item:nth-child(2) .hot-index {
            color: #94a3b8;
        }

        .hot-item:nth-child(3) .hot-index {
            color: #b45309;
        }

        .hot-info {
            flex: 1;
            min-width: 0;
        }

        .hot-info h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.45;
            margin-bottom: 4px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .hot-info h5:hover {
            color: var(--primary);
        }

        .hot-meta {
            font-size: 12px;
            color: var(--text-weak);
        }

        .hot-score {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(245, 158, 11, .1);
            padding: 2px 10px;
            border-radius: 999px;
            white-space: nowrap;
        }

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

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 32px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: .5px;
        }

        .section-head h2 span {
            color: var(--primary);
        }

        .section-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-weak);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s ease, gap .2s ease;
        }

        .section-more:hover {
            color: var(--primary);
            gap: 10px;
        }

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

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(226, 232, 240, .6);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .related-top {
            position: absolute;
            top: 14px;
            left: 14px;
            right: 14px;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .related-card .related-cover {
            position: relative;
            display: block;
            height: 180px;
            overflow: hidden;
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform .4s ease;
        }

        .related-card:hover .related-cover img {
            transform: scale(1.06);
        }

        .related-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, .25), transparent 55%);
        }

        .related-index {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 800;
            background: rgba(255, 255, 255, .92);
            color: var(--primary-dark);
            backdrop-filter: blur(6px);
            box-shadow: 0 2px 10px rgba(0, 0, 0, .12);
        }

        .related-info {
            padding: 18px 20px 20px;
        }

        .related-title {
            font-size: 15px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-title a {
            color: var(--text-main);
        }

        .related-title a:hover {
            color: var(--primary);
        }

        .related-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 12px;
            color: var(--text-weak);
            margin-bottom: 12px;
        }

        .related-meta .badge {
            padding: 2px 10px;
            font-size: 11px;
        }

        .hot-track {
            height: 5px;
            border-radius: 99px;
            background: var(--bg-body);
            overflow: hidden;
        }

        .hot-track-fill {
            height: 100%;
            border-radius: 99px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        /* ===== CTA ===== */
        .cta-box {
            padding: 0 0 var(--space);
        }

        .cta-inner {
            position: relative;
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            background:
                linear-gradient(135deg, rgba(30, 58, 138, .92), rgba(15, 23, 42, .95)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(245, 158, 11, .12);
        }

        .cta-inner h3 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, .78);
            margin-bottom: 30px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .7);
            padding: 72px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 44px;
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .6);
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 16px;
            color: #fff;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: .5px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

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

        .footer-col a {
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
            transition: color .2s ease, padding-left .2s ease;
        }

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

        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact p i {
            color: var(--accent);
            width: 18px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 22px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, .42);
        }

        .brand-line {
            color: rgba(255, 255, 255, .3);
            letter-spacing: 1px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space: 60px;
            }

            .nav-container {
                height: 64px;
                padding: 0 20px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                padding: 12px 20px;
                display: none;
            }

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

            .nav-link {
                padding: 14px 16px;
                border-radius: 10px;
                font-size: 15px;
            }

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

            .nav-link.active {
                background: rgba(29, 78, 216, .08);
                color: var(--primary);
            }

            .article-hero {
                padding: 56px 0 48px;
            }

            .article-title {
                font-size: 28px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

            .article-cover {
                height: 260px;
            }

            .article-content-html {
                padding: 28px 24px;
                font-size: 15.5px;
            }

            .article-content-html h2 {
                font-size: 21px;
            }

            .article-content-html h3 {
                font-size: 18px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .cta-inner {
                padding: 44px 28px;
                border-radius: 16px;
            }

            .cta-inner h3 {
                font-size: 24px;
            }

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

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

            .logo {
                font-size: 17px;
                gap: 8px;
            }

            .logo-dot {
                width: 10px;
                height: 10px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .related-cover {
                height: 200px;
            }

            .section-head h2 {
                font-size: 22px;
            }

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

            .cta-buttons .btn {
                width: 100%;
            }

            .article-card {
                border-radius: 16px;
            }

            .article-content-html {
                padding: 22px 18px;
            }

            .not-found {
                padding: 60px 20px;
            }

            .hot-item {
                padding: 10px 6px;
            }
        }

        @media (max-width: 360px) {
            .nav-container {
                gap: 12px;
            }

            .logo {
                font-size: 15px;
            }

            .logo-dot {
                width: 8px;
                height: 8px;
            }

            .main-nav {
                padding: 12px 14px;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-dark: #3730a3;
  --secondary: #f59e0b;
  --secondary-light: #fbbf24;
  --bg: #f8fafc;
  --bg-soft: #eef2ff;
  --bg-deep: #0f172a;
  --text: #0f172a;
  --text-body: #334155;
  --text-weak: #7c8ba1;
  --border: #e2e8f0;
  --white: #ffffff;
  --radius: 18px;
  --radius-sm: 10px;
  --radius-xs: 8px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1);
  --shadow-primary: 0 8px 28px rgba(79, 70, 229, 0.3);
  --transition: all 0.3s ease;
  --container: 1200px;
  --header-height: 72px;
}

/* ===== Reset / Base ===== */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.35);
  outline-offset: 2px;
  border-radius: 6px;
}

::selection { background: rgba(79, 70, 229, 0.15); color: var(--primary-dark); }

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

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  height: var(--header-height);
}

.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: var(--text);
  white-space: nowrap;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 999px;
  white-space: nowrap;
}

.nav-link:hover { color: var(--primary); background: rgba(79, 70, 229, 0.06); }

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
  background: rgba(79, 70, 229, 0.08);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 3px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-xs);
  color: var(--text);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--white);
}

.nav-toggle:hover { color: var(--primary); border-color: var(--primary); }

/* ===== 页头横幅 ===== */
.page-banner {
  position: relative;
  padding: 110px 0 100px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  isolation: isolate;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 0%, rgba(37, 36, 95, 0.78) 55%, rgba(79, 70, 229, 0.6) 100%);
  z-index: -1;
}

.banner-inner {
  max-width: 760px;
  color: var(--white);
}

.crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}

.crumb a { color: rgba(255, 255, 255, 0.85); }
.crumb a:hover { color: #fff; }
.crumb i { font-size: 11px; color: rgba(255, 255, 255, 0.4); }

.banner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.banner-tags span {
  display: inline-block;
  padding: 5px 15px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  font-size: 13px;
  color: #fff;
  letter-spacing: 0.5px;
}

.page-banner h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 18px;
}

.page-banner p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin-bottom: 34px;
}

.banner-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  transition: var(--transition);
  line-height: 1;
  white-space: nowrap;
}

.btn i { font-size: 14px; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(55, 48, 163, 0.35);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.25); transform: translateY(-2px); }

/* ===== 统计概览 ===== */
.stats-section {
  position: relative;
  z-index: 2;
  margin-top: -90px;
  padding-bottom: 64px;
}

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

.stats-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.stats-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }

.stats-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  background: var(--bg-soft);
}

.stats-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -1px;
}

.stats-num small { font-size: 18px; font-weight: 700; color: var(--primary); margin-left: 2px; }

.stats-label { font-size: 14px; color: var(--text-weak); margin-top: 6px; }

/* ===== 福利类型 ===== */
.section { padding: 84px 0; }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  padding: 6px 18px;
  background: var(--bg-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 16px;
  letter-spacing: 0.6px;
}

.section-head h2 {
  font-size: clamp(27px, 3.8vw, 38px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  letter-spacing: -0.8px;
  margin-bottom: 14px;
}

.section-head p { font-size: 16px; color: var(--text-weak); line-height: 1.8; }

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

.type-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  overflow: hidden;
  transition: var(--transition);
}

.type-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.08), transparent 70%);
  transition: var(--transition);
}

.type-card:hover { border-color: rgba(79, 70, 229, 0.25); box-shadow: var(--shadow-lg); transform: translateY(-5px); }
.type-card:hover::before { transform: scale(1.6); }

.type-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.28);
}

.type-card h3 { font-size: 19px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.type-card p { font-size: 15px; color: var(--text-weak); line-height: 1.7; }

.type-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.type-link i { font-size: 12px; transition: transform 0.3s ease; }
.type-card:hover .type-link i { transform: translateX(4px); }

/* ===== 热门福利活动 ===== */
.hot-section {
  background: var(--bg-deep);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  position: relative;
  isolation: isolate;
}

.hot-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.94), rgba(15, 23, 42, 0.9));
  z-index: 0;
}

.hot-section .container { position: relative; z-index: 1; }

.hot-section .section-head h2 { color: #fff; }
.hot-section .section-head p { color: rgba(255, 255, 255, 0.65); }
.hot-section .section-tag { background: rgba(79, 70, 229, 0.25); color: #c7d2fe; }

.hot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.hot-card {
  display: flex;
  gap: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 20px;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.hot-card:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.2); transform: translateY(-4px); }

.hot-img {
  width: 132px;
  height: 132px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
}

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

.hot-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--secondary);
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
  letter-spacing: 0.5px;
}

.hot-content { flex: 1; display: flex; flex-direction: column; }

.hot-content .hot-tag { display: inline-block; font-size: 12px; color: #a5b4fc; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 8px; }

.hot-content h3 { font-size: 18px; font-weight: 700; color: #fff; line-height: 1.4; margin-bottom: 8px; }

.hot-content p { font-size: 14px; color: rgba(255, 255, 255, 0.65); line-height: 1.65; margin-bottom: 14px; }

.hot-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  gap: 12px;
}

.hot-level { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; }

.hot-level span { font-size: 12px; color: rgba(255, 255, 255, 0.5); white-space: nowrap; }

.level-bar {
  flex: 1;
  height: 5px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  overflow: hidden;
}

.level-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-light), var(--secondary));
  border-radius: 4px;
  transition: width 0.8s ease;
}

.hot-go {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 600;
  color: #c7d2fe;
  white-space: nowrap;
}

.hot-go:hover { color: #fff; gap: 8px; }

/* ===== 领取流程 ===== */
.steps-section { padding: 84px 0; }

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

.step-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 24px 28px;
  text-align: center;
  transition: var(--transition);
}

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

.step-num {
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.25;
  margin-bottom: 12px;
  font-style: italic;
}

.step-card:hover .step-num { opacity: 0.9; }

.step-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--bg-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  transition: var(--transition);
}

.step-card:hover .step-icon { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35); }

.step-card h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.step-card p { font-size: 14px; color: var(--text-weak); line-height: 1.65; }

/* ===== 规则说明 ===== */
.rules-section {
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.rules-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: center;
}

.rules-text h2 { font-size: clamp(25px, 3.4vw, 34px); font-weight: 800; color: var(--text); margin-bottom: 16px; letter-spacing: -0.5px; }

.rules-text > .desc { font-size: 16px; color: var(--text-weak); margin-bottom: 30px; line-height: 1.8; }

.rule-list { display: flex; flex-direction: column; gap: 16px; }

.rule-item {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary);
  transition: var(--transition);
}

.rule-item:hover { background: var(--bg-soft); }

.rule-item i { color: var(--primary); font-size: 16px; margin-top: 2px; flex-shrink: 0; }
.rule-item p { font-size: 14px; color: var(--text-body); line-height: 1.7; }

.rules-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.rules-img img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }

.rules-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(15, 23, 42, 0.3), transparent 50%);
}

/* ===== FAQ ===== */
.faq-section { padding: 84px 0; }

.faq-list { max-width: 860px; margin: 0 auto; }

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover { border-color: rgba(79, 70, 229, 0.25); box-shadow: var(--shadow); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  transition: var(--transition);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary .faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--bg-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: var(--transition);
}

.faq-item[open] summary { color: var(--primary); }
.faq-item[open] summary .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }

.faq-item .faq-body { padding: 0 24px 22px; font-size: 15px; color: var(--text-weak); line-height: 1.8; }

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 96px 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  isolation: isolate;
  text-align: center;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(55, 48, 163, 0.82));
  z-index: -1;
}

.cta-content { max-width: 760px; margin: 0 auto; }

.cta-content h2 {
  font-size: clamp(27px, 4vw, 40px);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
}

.cta-content p { font-size: 16px; color: rgba(255, 255, 255, 0.75); line-height: 1.8; margin-bottom: 34px; }

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

.btn-light {
  background: #fff;
  color: var(--text);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
}

.btn-light:hover { background: var(--secondary-light); color: var(--text); transform: translateY(-2px); }

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover { background: rgba(255, 255, 255, 0.15); border-color: #fff; transform: translateY(-2px); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.65);
  padding: 76px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 50px;
}

.footer-brand .logo { color: #fff; margin-bottom: 18px; }
.footer-brand .logo .logo-dot { background: var(--secondary); box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2); }
.footer-brand p { font-size: 14px; line-height: 1.75; max-width: 320px; }

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }

.footer-col ul a { font-size: 14px; color: rgba(255, 255, 255, 0.55); }
.footer-col ul a:hover { color: var(--secondary); padding-left: 4px; }

.footer-contact p { font-size: 14px; color: rgba(255, 255, 255, 0.55); display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-contact i { color: var(--secondary); font-size: 13px; width: 16px; text-align: center; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 28px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.brand-line { letter-spacing: 0.5px; color: rgba(255, 255, 255, 0.5); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .benefit-type-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .rules-wrap { grid-template-columns: 1fr; gap: 36px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px 24px 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.1);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
    margin-left: 0;
    border-radius: 0 0 18px 18px;
  }

  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }

  .nav-link { padding: 13px 16px; font-size: 16px; border-radius: var(--radius-sm); }
  .nav-link.active { background: var(--bg-soft); }
  .nav-link.active::after { display: none; }

  .nav-toggle { display: flex; }

  .page-banner { padding: 72px 0 90px; }
  .page-banner p { font-size: 15px; }
  .banner-actions .btn { width: 100%; }

  .hot-grid { grid-template-columns: 1fr; }
  .hot-card { flex-direction: column; }
  .hot-img { width: 100%; height: 180px; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .nav-container { padding: 0 16px; gap: 16px; }
  .logo { font-size: 17px; }
  .logo-dot { width: 8px; height: 8px; }
  .nav-link { padding: 11px 14px; font-size: 15px; }

  .page-banner { padding: 56px 0 84px; }
  .banner-tags span { font-size: 12px; padding: 4px 12px; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stats-card { padding: 20px 14px; }
  .stats-num { font-size: 28px; }
  .stats-icon { width: 42px; height: 42px; font-size: 16px; margin-bottom: 10px; }

  .section { padding: 56px 0; }
  .section-head { margin-bottom: 32px; }

  .benefit-type-grid { grid-template-columns: 1fr; gap: 16px; }
  .type-card { padding: 24px 20px; }

  .steps-grid { grid-template-columns: 1fr; gap: 14px; }
  .step-card { padding: 24px 18px; }

  .rules-img img { min-height: 220px; }
  .rule-item { padding: 14px 14px; }
  .rule-item p { font-size: 13px; }

  .faq-item summary { padding: 16px 18px; font-size: 15px; }
  .faq-item .faq-body { padding: 0 18px 18px; font-size: 14px; }

  .cta-section { padding: 64px 0; background-attachment: scroll; }
  .cta-actions .btn { width: 100%; }
}

/* roulang page: category3 */
:root {
  --primary: #6C5CE7;
  --primary-dark: #5543D1;
  --primary-soft: #F0EEFE;
  --accent: #FF9A5C;
  --accent-soft: #FFF3EB;
  --dark: #12162B;
  --dark-2: #1B2040;
  --bg: #F6F7FC;
  --bg-white: #FFFFFF;
  --text: #2A2E45;
  --muted: #6B7089;
  --border: #E7E9F2;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 26px;
  --shadow: 0 20px 55px rgba(18, 22, 43, 0.09);
  --shadow-sm: 0 8px 25px rgba(18, 22, 43, 0.06);
  --transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  --container: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
  outline: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
}

.section-head {
  margin-bottom: 48px;
  max-width: 700px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 7px 16px;
  border-radius: 40px;
  margin-bottom: 18px;
}

.section-tag i {
  font-size: 12px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: -0.02em;
}

.section-desc {
  margin-top: 14px;
  font-size: 16px;
  color: var(--muted);
  line-height: 1.8;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 40px;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 25px rgba(108, 92, 231, 0.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(108, 92, 231, 0.34);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 14px rgba(108, 92, 231, 0.26);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--dark);
  box-shadow: 0 10px 30px rgba(18, 22, 43, 0.12);
}

.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(18, 22, 43, 0.16);
}

.btn:focus-visible {
  outline: 3px solid rgba(108, 92, 231, 0.5);
  outline-offset: 3px;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1;
  letter-spacing: -0.02em;
}

.logo-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.12);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  border-radius: 4px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s ease;
}

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

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--dark);
  font-size: 17px;
  transition: var(--transition);
}

.nav-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

@media (max-width: 992px) {
  .main-nav {
    position: fixed;
    top: 72px;
    right: 16px;
    width: 270px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px;
    transform: translateX(120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
  }

  .main-nav.open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    justify-content: space-between;
    padding: 13px 16px;
    border-radius: 12px;
    font-size: 15px;
  }

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

  .nav-link.active {
    background: var(--primary-soft);
  }

  .nav-toggle {
    display: inline-flex;
  }
}

/* Hero Banner */
.hero {
  position: relative;
  background: linear-gradient(110deg, rgba(18, 22, 43, 0.94), rgba(18, 22, 43, 0.72)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  padding: 120px 0 100px;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  right: -120px;
  top: -120px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.4), transparent 70%);
  pointer-events: none;
}

.hero::before {
  content: '';
  position: absolute;
  left: -80px;
  bottom: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 154, 92, 0.25), transparent 70%);
  pointer-events: none;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 22px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb i {
  font-size: 10px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 40px;
  letter-spacing: 0.04em;
  margin-bottom: 26px;
}

.hero-badge i {
  color: var(--accent);
}

.hero-title {
  font-size: clamp(34px, 6vw, 62px);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

.hero-title span {
  background: linear-gradient(90deg, #A79DFF, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.82);
  max-width: 640px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 38px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-tags .tag {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  padding: 6px 16px;
  border-radius: 30px;
  transition: var(--transition);
}

.hero-tags .tag:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  transform: translateY(-1px);
}

/* Hot Topics */
.hot-wrap {
  background: var(--bg-white);
}

.hot-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hot-card {
  display: flex;
  align-items: center;
  gap: 22px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  transition: var(--transition);
}

.hot-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: transparent;
}

.hot-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--border);
  letter-spacing: -0.05em;
  min-width: 44px;
  font-family: Georgia, serif;
  transition: var(--transition);
}

.hot-card:nth-child(1) .hot-num {
  color: #FF9A5C;
}

.hot-card:nth-child(2) .hot-num {
  color: #6C5CE7;
}

.hot-card:nth-child(3) .hot-num {
  color: #4BB3CF;
}

.hot-body {
  flex: 1;
  padding-right: 12px;
}

.hot-title {
  font-size: 17px;
  font-weight: 650;
  color: var(--dark);
  line-height: 1.5;
  margin-bottom: 5px;
}

.hot-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hot-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--muted);
}

.hot-meta i {
  color: var(--primary);
}

.heat-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-soft);
  color: #E26B2B;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 13px;
  border-radius: 30px;
}

.hot-cover {
  width: 92px;
  height: 72px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 640px) {
  .hot-card {
    flex-wrap: wrap;
  }

  .hot-cover {
    display: none;
  }

  .hot-meta {
    flex-wrap: wrap;
  }
}

/* Topic Grid */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.topic-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--dark);
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.topic-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.75;
  transition: transform 0.5s ease, opacity 0.3s ease;
}

.topic-card:hover img {
  transform: scale(1.06);
  opacity: 0.6;
}

.topic-info {
  position: relative;
  z-index: 2;
  padding: 24px;
  width: 100%;
  background: linear-gradient(to top, rgba(18, 22, 43, 0.9), transparent);
}

.topic-info .tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 30px;
  margin-bottom: 10px;
}

.topic-title {
  color: #fff;
  font-size: 18px;
  font-weight: 650;
  margin-bottom: 4px;
}

.topic-meta {
  color: rgba(255, 255, 255, 0.65);
  font-size: 13px;
}

@media (max-width: 992px) {
  .topic-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* Track List */
.track-wrap {
  background: var(--dark);
  background-image: radial-gradient(circle at 80% 10%, rgba(108, 92, 231, 0.18), transparent 40%);
  color: #fff;
}

.track-wrap .section-title {
  color: #fff;
}

.track-wrap .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

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

.track-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 20px;
  transition: var(--transition);
}

.track-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.18);
}

.track-cover {
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 18px;
  aspect-ratio: 16 / 9;
}

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

.track-card:hover .track-cover img {
  transform: scale(1.05);
}

.track-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.track-status {
  background: rgba(255, 154, 92, 0.15);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 30px;
}

.update-time {
  color: rgba(255, 255, 255, 0.45);
  font-size: 12px;
}

.track-title {
  font-size: 17px;
  font-weight: 650;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 18px;
}

.progress {
  height: 6px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-bar {
  height: 100%;
  border-radius: 20px;
  background: linear-gradient(90deg, var(--primary), #A79DFF);
  transition: width 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
}

@media (max-width: 992px) {
  .track-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
}

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

.creator-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  text-align: center;
  transition: var(--transition);
}

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

.creator-avatar {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary-soft);
  padding: 3px;
}

.creator-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
}

.creator-role {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
  margin-bottom: 14px;
}

.creator-creds {
  font-size: 13px;
  color: var(--muted);
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  margin-bottom: 18px;
}

.creator-follow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 26px;
  border-radius: 40px;
  transition: var(--transition);
}

.creator-follow:hover {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 24px rgba(108, 92, 231, 0.28);
  transform: translateY(-2px);
}

@media (max-width: 992px) {
  .creator-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}

/* Stats Band */
.stats-band {
  position: relative;
  background: linear-gradient(135deg, #1B2040, #12162B);
  border-radius: 30px;
  padding: 56px 48px;
  overflow: hidden;
}

.stats-band::before {
  content: '';
  position: absolute;
  right: -60px;
  top: -60px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, var(--primary), transparent 70%);
  opacity: 0.3;
}

.stats-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stats-item {
  text-align: center;
  padding: 16px 8px;
}

.stats-num {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.stats-num span {
  color: var(--accent);
}

.stats-label {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
}

.stats-note {
  margin-top: 40px;
  text-align: center;
  color: rgba(255, 255, 255, 0.4);
  font-size: 13px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
}

.stats-note i {
  color: var(--accent);
  margin-right: 6px;
}

@media (max-width: 768px) {
  .stats-band {
    padding: 40px 20px;
  }

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

/* FAQ */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(108, 92, 231, 0.3);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 14px;
  color: var(--primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.faq-answer a {
  color: var(--primary);
  font-weight: 500;
}

.faq-answer a:hover {
  text-decoration: underline;
}

/* CTA */
.cta-band {
  position: relative;
  background: linear-gradient(110deg, var(--primary), var(--primary-dark));
  border-radius: 30px;
  padding: 64px 56px;
  overflow: hidden;
  text-align: center;
}

.cta-band::before {
  content: '';
  position: absolute;
  left: -50px;
  bottom: -80px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2), transparent 70%);
}

.cta-band::after {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 154, 92, 0.35), transparent 70%);
}

.cta-inner {
  position: relative;
  z-index: 2;
}

.cta-inner h2 {
  font-size: clamp(24px, 3.6vw, 38px);
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 520px;
  margin: 0 auto 34px;
  line-height: 1.8;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .cta-band {
    padding: 44px 24px;
  }
}

/* Footer */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.55);
  padding: 72px 0 0;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 18px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  max-width: 300px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}

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

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-contact i {
  width: 18px;
  color: var(--accent);
  text-align: center;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

.brand-line {
  color: rgba(255, 255, 255, 0.28);
  font-size: 13px;
  letter-spacing: 0.02em;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* Focus visibility */
a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(108, 92, 231, 0.5);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Mobile menu overlay spacing */
@media (max-width: 992px) {
  .nav-container {
    padding: 0 16px;
  }

  .hero {
    padding: 92px 0 80px;
  }
}