/* roulang page: index */
:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --dark-bg: #0a0f1e;
  --dark-bg-2: #111827;
  --dark-card: rgba(255, 255, 255, 0.06);
  --light-bg: #f6f7fb;
  --light-card: #ffffff;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-light: rgba(255, 255, 255, 0.12);
  --border: #e2e8f0;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 28px;
  --shadow-sm: 0 2px 12px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 35px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 24px 80px rgba(15, 23, 42, 0.16);
  --transition: all 0.28s ease;
  --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  background: var(--light-bg);
  color: var(--text-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
a:hover {
  color: var(--primary);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button, input, select, textarea {
  font-family: inherit;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 28px;
  font-weight: 600;
  font-size: 15px;
  border-radius: 50px;
  border: none;
  transition: var(--transition);
  cursor: pointer;
}
.btn:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.4);
  outline-offset: 2px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
  transform: translateY(-2px);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-light);
  color: #fff;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
  transform: translateY(-2px);
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent), #d97706);
  color: #fff;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
}
.btn-accent:hover {
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
  transform: translateY(-2px);
  color: #fff;
}
.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-primary {
  background: rgba(99, 102, 241, 0.12);
  color: var(--primary);
}
.badge-accent {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
}
.badge-dark {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}
.container {
  max-width: 1200px;
  padding: 0 24px;
}
/* ===== Header / Dock Nav ===== */
.site-header {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
}
.dock-nav {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 20px 10px 24px;
  background: rgba(10, 15, 30, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 60px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.brand i {
  color: var(--accent);
  font-size: 22px;
}
.brand:hover {
  color: var(--accent-light);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 40px;
  white-space: nowrap;
}
.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.nav-links a.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-actions .btn {
  padding: 9px 22px;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
}
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}
/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--dark-bg);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.5;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 15, 30, 0.92) 0%, rgba(10, 15, 30, 0.72) 50%, rgba(10, 15, 30, 0.55) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 160px 0 100px;
  color: #fff;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}
.hero-badge i {
  color: var(--accent);
}
.hero h1 {
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero h1 .gradient-text {
  background: linear-gradient(120deg, var(--primary-light), var(--accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .lead {
  font-size: clamp(16px, 2vw, 20px);
  color: rgba(255, 255, 255, 0.8);
  max-width: 680px;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  flex-wrap: wrap;
}
.hero-stat {
  text-align: left;
}
.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
}
.hero-stat .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 2px;
}
/* ===== Section ===== */
.section {
  padding: 100px 0;
}
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}
.section-header .tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
  padding: 5px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.section-header h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.section-header p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
}
/* ===== Intro / Platform ===== */
.intro-section {
  background: var(--light-bg);
  position: relative;
  overflow: hidden;
}
.intro-section::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08), transparent 70%);
  border-radius: 50%;
}
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.intro-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.intro-visual img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.intro-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 15, 30, 0.6), transparent 50%);
}
.intro-float-card {
  position: absolute;
  z-index: 2;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-radius: 16px;
  padding: 18px 22px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 14px;
}
.intro-float-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.intro-float-card .text b {
  font-size: 14px;
  display: block;
}
.intro-float-card .text span {
  font-size: 12px;
  color: var(--text-muted);
}
.intro-float-card.card-1 {
  bottom: 120px;
  left: -20px;
}
.intro-float-card.card-2 {
  bottom: 40px;
  right: -15px;
}
.intro-float-card.card-1 .icon {
  background: rgba(99, 102, 241, 0.12);
  color: var(--primary);
}
.intro-float-card.card-2 .icon {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
}
.intro-text h3 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.4;
}
.intro-text p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.intro-points {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 14px;
}
.intro-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text-dark);
}
.intro-points li i {
  color: var(--primary);
  margin-top: 4px;
  flex-shrink: 0;
}
/* ===== Category ===== */
.category-section {
  background: var(--dark-bg);
  position: relative;
  overflow: hidden;
}
.category-section::before {
  content: '';
  position: absolute;
  bottom: -200px;
  left: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15), transparent 70%);
  border-radius: 50%;
}
.category-section .section-header h2 {
  color: #fff;
}
.category-section .section-header p {
  color: rgba(255, 255, 255, 0.6);
}
.category-section .section-header .tag {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-light);
}
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  position: relative;
  z-index: 1;
}
.category-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}
.category-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}
.category-card .card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.category-card .card-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}
.category-card .card-icon i {
  font-size: 24px;
}
.category-card .card-icon.accent {
  background: linear-gradient(135deg, var(--accent), #d97706);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
}
.category-card h3 {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}
.category-card p {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.category-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-light);
  font-size: 14px;
  font-weight: 600;
}
.category-card .card-link i {
  transition: transform 0.25s ease;
}
.category-card:hover .card-link i {
  transform: translateX(4px);
}
/* ===== News ===== */
.news-section {
  background: var(--light-bg);
}
.news-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.news-card {
  background: var(--light-card);
  border-radius: var(--radius);
  padding: 32px 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  display: flex;
  gap: 20px;
  transition: var(--transition);
}
.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.3);
}
.news-index {
  font-size: 28px;
  font-weight: 800;
  color: rgba(99, 102, 241, 0.25);
  line-height: 1;
  flex-shrink: 0;
  min-width: 40px;
}
.news-body {
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--text-muted);
}
.news-category {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  padding: 3px 12px;
  border-radius: 50px;
  font-weight: 600;
}
.news-date {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
}
.news-title a {
  color: var(--text-dark);
}
.news-title a:hover {
  color: var(--primary);
}
.news-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.news-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-more i {
  transition: transform 0.25s ease;
}
.news-more:hover i {
  transform: translateX(4px);
}
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state i {
  font-size: 40px;
  color: #cbd5e1;
  margin-bottom: 12px;
}
/* ===== Stats ===== */
.stats-section {
  background: linear-gradient(135deg, #1e1b4b, #0f172a);
  color: #fff;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2), transparent 70%);
  border-radius: 50%;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  z-index: 1;
}
.stat-item {
  text-align: center;
  padding: 30px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  transition: var(--transition);
}
.stat-item:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-4px);
}
.stat-item .icon {
  font-size: 30px;
  margin-bottom: 16px;
  color: var(--accent);
}
.stat-item .value {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.stat-item .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}
/* ===== Features ===== */
.features-section {
  background: var(--light-bg);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.feature-card {
  background: var(--light-card);
  border-radius: var(--radius);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
}
.feature-card:hover::after {
  opacity: 1;
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}
.feature-icon.indigo {
  background: rgba(99, 102, 241, 0.12);
  color: var(--primary);
}
.feature-icon.amber {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
}
.feature-icon.teal {
  background: rgba(20, 184, 166, 0.12);
  color: #0d9488;
}
.feature-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
/* ===== FAQ ===== */
.faq-section {
  background: #fff;
}
.faq-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
  align-items: start;
}
.faq-intro h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.faq-intro p {
  color: var(--text-muted);
  margin-bottom: 24px;
}
.faq-intro .btn {
  margin-top: 8px;
}
.faq-list {
  display: grid;
  gap: 14px;
}
.faq-item {
  background: var(--light-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  list-style: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary i {
  color: var(--primary);
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}
.faq-item[open] summary i {
  transform: rotate(45deg);
}
.faq-item .faq-answer {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #1e1b4b 0%, #0f172a 60%, #1e1b4b 100%);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
  color: #fff;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.2), transparent 70%);
  border-radius: 50%;
}
.cta-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.cta-content p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
/* ===== Footer ===== */
.site-footer {
  background: #0a0f1e;
  padding: 70px 0 0;
  color: rgba(255, 255, 255, 0.6);
}
.footer-brand {
  margin-bottom: 20px;
}
.footer-brand .brand {
  font-size: 22px;
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}
.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}
.footer-col h5 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.03em;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 10px;
}
.footer-col ul a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
}
.footer-col ul a:hover {
  color: var(--accent-light);
}
.footer-col .social-links {
  display: flex;
  gap: 12px;
}
.footer-col .social-links a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.6);
  font-size: 15px;
}
.footer-col .social-links a:hover {
  background: rgba(99, 102, 241, 0.3);
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
/* ===== Mobile Menu ===== */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: #0f172a;
  z-index: 2000;
  transition: right 0.35s ease;
  padding: 40px 30px;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
}
.mobile-menu.open {
  right: 0;
}
.mobile-menu .close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mobile-menu .close-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}
.mobile-menu a.menu-link {
  color: rgba(255, 255, 255, 0.8);
  font-size: 17px;
  font-weight: 600;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.mobile-menu a.menu-link.active {
  color: var(--accent-light);
}
.mobile-menu .menu-btn {
  margin-top: 30px;
}
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.overlay.open {
  opacity: 1;
  pointer-events: auto;
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-actions .btn {
    display: none;
  }
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .intro-visual img {
    height: 320px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}
@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .news-list {
    grid-template-columns: 1fr;
  }
  .footer-links {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .hero-content {
    padding: 120px 0 70px;
  }
  .hero-stats {
    gap: 20px;
  }
  .hero-stat .num {
    font-size: 26px;
  }
  .intro-float-card.card-1 {
    left: -10px;
  }
  .intro-float-card.card-2 {
    right: -10px;
  }
  .dock-nav {
    padding: 8px 14px 8px 18px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .brand {
    font-size: 17px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .news-card {
    flex-direction: column;
    gap: 10px;
    padding: 24px 20px;
  }
  .news-index {
    font-size: 20px;
  }
  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #6d5efc;
            --primary-dark: #5446e0;
            --primary-light: #ede9ff;
            --accent: #f5a623;
            --accent-light: #fff4e0;
            --bg: #f7f8fc;
            --bg-deep: #0f1023;
            --text: #1d1f2e;
            --text-muted: #67708d;
            --border: #e7e9f2;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 32px rgba(31, 35, 68, 0.08);
            --shadow-lg: 0 18px 50px rgba(31, 35, 68, 0.12);
            --space-section: 96px;
            --space-section-sm: 64px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

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

        button {
            border: none;
            background: none;
            cursor: pointer;
        }

        .container {
            max-width: 1240px;
            padding-left: 24px;
            padding-right: 24px;
        }

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

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

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

        .section-head .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            padding: 6px 18px;
            border-radius: 100px;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

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

        /* —— 浮动 Dock 导航 —— */
        .site-header {
            position: fixed;
            top: 20px;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 0 24px;
            pointer-events: none;
        }

        .dock-nav {
            pointer-events: auto;
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.9);
            border-radius: 60px;
            padding: 12px 20px 12px 26px;
            box-shadow: 0 8px 40px rgba(31, 35, 68, 0.12);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .dock-nav:hover {
            box-shadow: 0 12px 48px rgba(31, 35, 68, 0.16);
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.3px;
            color: var(--text);
            white-space: nowrap;
        }

        .brand i {
            font-size: 20px;
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            border-radius: 12px;
            box-shadow: 0 6px 18px rgba(109, 94, 252, 0.35);
        }

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

        .nav-links a {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            padding: 9px 18px;
            border-radius: 40px;
            transition: all 0.25s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 6px 20px rgba(109, 94, 252, 0.4);
        }

        .nav-actions .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border: none;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 6px 20px rgba(109, 94, 252, 0.35);
            transition: all 0.25s ease;
        }

        .nav-actions .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(109, 94, 252, 0.45);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--bg);
            color: var(--text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: background 0.2s;
        }

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

        /* —— 页面横幅 Banner —— */
        .page-banner {
            position: relative;
            padding: 200px 0 110px;
            overflow: hidden;
            background: var(--bg-deep);
        }

        .banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.5;
        }

        .banner-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15, 16, 35, 0.92) 0%, rgba(15, 16, 35, 0.62) 50%, rgba(109, 94, 252, 0.25) 100%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 22px;
        }

        .banner-breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }

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

        .banner-breadcrumb i {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }

        .banner-breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }

        .banner-content h1 {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }

        .banner-content h1 span {
            background: linear-gradient(135deg, #b3a7ff, #f5a623);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .banner-content p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
            margin-bottom: 34px;
        }

        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn-primary-lg {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 50px;
            box-shadow: 0 10px 30px rgba(109, 94, 252, 0.45);
            transition: all 0.25s ease;
        }

        .btn-primary-lg:hover {
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(109, 94, 252, 0.55);
        }

        .btn-outline-light-lg {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: 50px;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(6px);
            transition: all 0.25s ease;
        }

        .btn-outline-light-lg:hover {
            color: #fff;
            border-color: #fff;
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-3px);
        }

        .banner-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .banner-stats .stat-item h4 {
            color: #fff;
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 2px;
        }

        .banner-stats .stat-item span {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }

        /* —— 玩法概览 —— */
        .overview-section {
            position: relative;
        }

        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .overview-media {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .overview-media img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }

        .overview-media .media-float-card {
            position: absolute;
            bottom: 24px;
            left: 24px;
            right: 24px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-radius: 16px;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
        }

        .overview-media .media-float-card i {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 18px;
            border-radius: 12px;
        }

        .overview-media .media-float-card strong {
            font-size: 15px;
            display: block;
        }

        .overview-media .media-float-card span {
            font-size: 13px;
            color: var(--text-muted);
        }

        .overview-content .intro-label {
            display: inline-block;
            background: var(--accent-light);
            color: #b57510;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 14px;
        }

        .overview-content h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .overview-content p {
            color: var(--text-muted);
            font-size: 15.5px;
            margin-bottom: 28px;
        }

        .feature-mini-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .feature-mini {
            display: flex;
            align-items: center;
            gap: 12px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            transition: all 0.25s ease;
        }

        .feature-mini:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }

        .feature-mini i {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 15px;
            border-radius: 10px;
        }

        .feature-mini strong {
            font-size: 14.5px;
            font-weight: 600;
        }

        /* —— 玩法流程 —— */
        .flow-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

        .flow-card {
            position: relative;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px 28px;
            transition: all 0.3s ease;
            overflow: hidden;
        }

        .flow-card::before {
            counter-increment: flow-index;
            content: "0" counter(flow-index);
            position: absolute;
            top: 18px;
            right: 20px;
            font-size: 44px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            transition: color 0.3s ease;
        }

        .flow-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .flow-card:hover::before {
            color: var(--primary);
        }

        .flow-card .flow-icon {
            width: 52px;
            height: 52px;
            margin-bottom: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            font-size: 20px;
            background: var(--primary-light);
            color: var(--primary);
        }

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

        .flow-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* —— 核心玩法模块 —— */
        .module-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .module-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

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

        .module-card .module-img {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .module-card .module-img img {
            width: 100%;
            height: 100%;
            transition: transform 0.5s ease;
        }

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

        .module-card .module-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 16, 35, 0.25), transparent 50%);
        }

        .module-card .module-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            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: 100px;
        }

        .module-card .module-body {
            padding: 22px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .module-card .module-body h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        .module-card .module-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease;
        }

        .module-card .module-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* —— FAQ —— */
        .faq-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

        .accordion-item {
            border: 1px solid var(--border) !important;
            border-radius: 14px !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(31, 35, 68, 0.04);
        }

        .accordion-button {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text);
            padding: 20px 24px;
            background: #fafbff;
            border: none;
        }

        .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }

        .accordion-body {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.8;
            padding: 8px 24px 22px;
            background: #fff;
        }

        /* —— CTA —— */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: linear-gradient(135deg, var(--bg-deep) 0%, #202245 60%, #2a2166 100%);
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(109, 94, 252, 0.22);
            filter: blur(80px);
            top: -120px;
            right: -60px;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.12);
            filter: blur(70px);
            bottom: -100px;
            left: -60px;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

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

        /* —— 页脚 —— */
        .site-footer {
            background: var(--bg-deep);
            padding: 72px 0 32px;
        }

        .site-footer .container {
            max-width: 1240px;
        }

        .footer-links {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand {
            color: #fff;
            font-size: 24px;
        }

        .footer-brand .brand i {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            line-height: 1.8;
            margin-top: 18px;
            max-width: 320px;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-col ul a:hover {
            color: #fff;
            padding-left: 6px;
        }

        .social-links {
            display: flex;
            gap: 12px;
        }

        .social-links a {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            transition: all 0.25s ease;
        }

        .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            padding-top: 28px;
            color: rgba(255, 255, 255, 0.35);
            font-size: 13px;
        }

        /* —— 响应式 —— */
        @media (max-width: 992px) {
            .dock-nav {
                flex-wrap: wrap;
            }

            .nav-links {
                order: 3;
                width: 100%;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: 14px;
                margin-top: 10px;
                border-top: 1px solid var(--border);
            }

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

            .nav-links a {
                padding: 12px 16px;
                border-radius: 12px;
            }

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

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

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

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

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

        @media (max-width: 768px) {
            .site-header {
                top: 12px;
                padding: 0 14px;
            }

            .dock-nav {
                padding: 10px 14px 10px 18px;
                border-radius: 20px;
            }

            .brand {
                font-size: 19px;
            }

            .brand i {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .nav-actions .btn-primary {
                display: none;
            }

            .page-banner {
                padding: 150px 0 70px;
            }

            .banner-content h1 {
                font-size: 30px;
            }

            .banner-content p {
                font-size: 15px;
            }

            .banner-stats {
                gap: 24px;
                flex-wrap: wrap;
            }

            .section {
                padding: 64px 0;
            }

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

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

            .feature-mini-list {
                grid-template-columns: 1fr;
            }

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

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

        @media (max-width: 520px) {
            .banner-actions {
                flex-direction: column;
                width: 100%;
            }

            .banner-actions .btn-primary-lg,
            .banner-actions .btn-outline-light-lg {
                width: 100%;
                justify-content: center;
            }

            .overview-media img {
                height: 300px;
            }

            .media-float-card {
                position: static;
                margin: 14px;
            }

            .overview-media {
                padding-bottom: 0;
            }

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

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

            .cta-btn-group .btn-primary-lg,
            .cta-btn-group .btn-outline-light-lg {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #7c3aed;
            --primary-dark: #6d28d9;
            --primary-light: #c4b5fd;
            --secondary: #10b981;
            --secondary-dark: #059669;
            --accent: #f59e0b;
            --bg-body: #f8f7fc;
            --bg-white: #ffffff;
            --bg-light: #f1eef9;
            --bg-dark: #1e1b4b;
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --border: #e5e7eb;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(30, 27, 75, 0.06);
            --shadow-md: 0 8px 30px rgba(30, 27, 75, 0.1);
            --shadow-lg: 0 16px 48px rgba(30, 27, 75, 0.16);
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        img {
            max-width: 100%;
            height: auto;
        }

        button,
        input {
            font-family: inherit;
        }

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

        /* ======== 浮动 Dock 导航 ======== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            padding-top: 16px;
            pointer-events: none;
        }

        .site-header.header-hidden {
            padding-top: 0;
        }

        .dock-nav {
            pointer-events: auto;
            max-width: 1160px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(124, 58, 237, 0.08);
            border-radius: 60px;
            padding: 10px 12px 10px 24px;
            box-shadow: 0 8px 32px rgba(30, 27, 75, 0.1);
            transition: box-shadow 0.3s ease;
        }

        .dock-nav:hover {
            box-shadow: 0 12px 40px rgba(30, 27, 75, 0.14);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-main);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .brand i {
            color: var(--primary);
            font-size: 1.4rem;
            transition: transform 0.3s ease;
        }

        .brand:hover i {
            transform: rotate(-10deg) scale(1.1);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.925rem;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
            transition: background 0.25s ease, color 0.25s ease;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(124, 58, 237, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(124, 58, 237, 0.1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn {
            border-radius: 50px;
            font-weight: 600;
            padding: 10px 22px;
            transition: all 0.25s ease;
        }

        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 58, 237, 0.4);
        }

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

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.875rem;
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

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

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--text-main);
            cursor: pointer;
            padding: 8px;
            border-radius: 50%;
            transition: background 0.2s ease;
        }

        .nav-toggle:hover {
            background: rgba(124, 58, 237, 0.1);
        }

        @media (max-width: 991.98px) {
            .site-header {
                padding-top: 12px;
                padding-left: 12px;
                padding-right: 12px;
            }

            .dock-nav {
                border-radius: 24px;
                padding: 10px 12px 10px 18px;
                flex-wrap: wrap;
            }

            .nav-links {
                order: 3;
                flex-basis: 100%;
                justify-content: flex-start;
                gap: 4px;
                padding: 6px 0 2px;
            }

            .nav-links a {
                padding: 6px 14px;
                font-size: 0.85rem;
            }

            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 575.98px) {
            .brand span {
                font-size: 1.05rem;
            }

            .nav-actions .btn {
                padding: 7px 14px;
                font-size: 0.8rem;
            }

            .nav-links a {
                padding: 5px 11px;
                font-size: 0.78rem;
            }
        }

        /* ======== Hero 区块 ======== */
        .category-hero {
            position: relative;
            padding: 120px 0 90px;
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%);
            overflow: hidden;
            margin-bottom: 60px;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.4) 0%, transparent 65%);
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.25) 0%, transparent 60%);
            pointer-events: none;
        }

        .category-hero .backdrop-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.15;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero h1 {
            color: #fff;
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .category-hero h1 .highlight {
            background: linear-gradient(135deg, #a78bfa, #34d399);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 640px;
            margin-bottom: 28px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 8px;
        }

        .hero-badges .badge {
            background: rgba(255, 255, 255, 0.12);
            border-radius: 40px;
            padding: 8px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #e0e7ff;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 48px;
            padding: 28px 32px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 24px;
            backdrop-filter: blur(8px);
        }

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

        .hero-stats .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.3;
        }

        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
        }

        @media (max-width: 767.98px) {
            .category-hero {
                padding: 80px 0 60px;
            }

            .category-hero h1 {
                font-size: 1.8rem;
            }

            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                padding: 20px;
                gap: 14px;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero h1 {
                font-size: 1.55rem;
            }

            .category-hero p {
                font-size: 0.95rem;
            }
        }

        /* ======== 板块标题 ======== */
        .section {
            padding: 40px 0 80px;
        }

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

        .section-heading .eyebrow {
            display: inline-block;
            background: rgba(124, 58, 237, 0.08);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            border-radius: 40px;
            padding: 6px 16px;
            margin-bottom: 16px;
        }

        .section-heading h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-heading p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
        }

        @media (max-width: 575.98px) {
            .section-heading h2 {
                font-size: 1.6rem;
            }
        }

        /* ======== 活动类型卡片 ======== */
        .activity-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .activity-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .activity-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(124, 58, 237, 0.25);
        }

        .activity-card .icon-wrap {
            width: 68px;
            height: 68px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 18px;
            color: #fff;
        }

        .activity-card .icon-wrap.bg-purple {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
        }

        .activity-card .icon-wrap.bg-green {
            background: linear-gradient(135deg, #34d399, #10b981);
        }

        .activity-card .icon-wrap.bg-amber {
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
        }

        .activity-card .icon-wrap.bg-blue {
            background: linear-gradient(135deg, #60a5fa, #3b82f6);
        }

        .activity-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .activity-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        @media (max-width: 991.98px) {
            .activity-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 575.98px) {
            .activity-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ======== 热门福利列表 ======== */
        .welfare-list-wrap {
            background: var(--bg-white);
            border-radius: 24px;
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .welfare-item {
            display: flex;
            gap: 20px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border);
            align-items: center;
        }

        .welfare-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .welfare-item:first-child {
            padding-top: 0;
        }

        .welfare-item .cover {
            flex: 0 0 200px;
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
        }

        .welfare-item .cover img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .welfare-item .cover:hover img {
            transform: scale(1.05);
        }

        .welfare-item .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(124, 58, 237, 0.92);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 30px;
            z-index: 2;
        }

        .welfare-item .tag.tag-hot {
            background: rgba(245, 158, 11, 0.92);
        }

        .welfare-item .tag.tag-new {
            background: rgba(16, 185, 129, 0.92);
        }

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

        .welfare-item .info h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .welfare-item .info h3 a {
            color: var(--text-main);
        }

        .welfare-item .info h3 a:hover {
            color: var(--primary);
        }

        .welfare-item .info .desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 10px;
        }

        .welfare-item .meta {
            display: flex;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .welfare-item .meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

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

        .welfare-item .action {
            flex-shrink: 0;
        }

        @media (max-width: 767.98px) {
            .welfare-list-wrap {
                padding: 24px 20px;
            }

            .welfare-item {
                flex-direction: column;
                gap: 14px;
                text-align: left;
            }

            .welfare-item .cover {
                flex-basis: auto;
                width: 100%;
            }

            .welfare-item .cover img {
                height: 180px;
                width: 100%;
            }
        }

        /* ======== 数据统计模块 ======== */
        .stats-band {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 60%, #4c1d95 100%);
            border-radius: 28px;
            padding: 50px 40px;
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(167, 139, 250, 0.3) 0%, transparent 70%);
        }

        .stats-band .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .stats-band .stat-grid .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .stats-band .stat-grid .stat-label {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            margin-top: 6px;
        }

        @media (max-width: 767.98px) {
            .stats-band {
                padding: 36px 24px;
                border-radius: 20px;
            }

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

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

        .step-card {
            position: relative;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 36px 24px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

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

        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -16px;
            left: 24px;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
        }

        .step-card .step-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 14px;
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        @media (max-width: 991.98px) {
            .steps-wrapper {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 575.98px) {
            .steps-wrapper {
                grid-template-columns: 1fr;
            }
        }

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

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 28px 24px;
            margin-bottom: 16px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(124, 58, 237, 0.2);
        }

        .faq-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .faq-item h3 .icon {
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .faq-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            padding-left: 30px;
        }

        @media (max-width: 575.98px) {
            .faq-item {
                padding: 20px 16px;
            }

            .faq-item p {
                padding-left: 0;
            }
        }

        /* ======== CTA 区块 ======== */
        .cta-band {
            background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 50%, #4c1d95 100%);
            border-radius: 28px;
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
        }

        .cta-band h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            position: relative;
            z-index: 2;
        }

        .cta-band p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 540px;
            margin: 0 auto 28px;
            font-size: 1rem;
            position: relative;
            z-index: 2;
        }

        .cta-band .btn {
            padding: 14px 36px;
            font-size: 1rem;
            border-radius: 50px;
            position: relative;
            z-index: 2;
        }

        .cta-band .btn-light {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
        }

        .cta-band .btn-light:hover {
            background: #f0edff;
            border-color: #f0edff;
            transform: translateY(-2px);
        }

        @media (max-width: 575.98px) {
            .cta-band {
                padding: 40px 20px;
                border-radius: 20px;
            }

            .cta-band h2 {
                font-size: 1.4rem;
            }
        }

        /* ======== 页脚 ======== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 70px 0 0;
            margin-top: 60px;
        }

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

        .site-footer .brand i {
            color: #a78bfa;
        }

        .footer-desc {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-links {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.03em;
        }

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

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            transition: color 0.2s ease;
        }

        .footer-col ul a:hover {
            color: #a78bfa;
        }

        .social-links {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: background 0.25s ease, transform 0.25s ease, color 0.25s ease;
        }

        .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 22px 0 28px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
            flex-wrap: wrap;
            gap: 10px;
        }

        @media (max-width: 767.98px) {
            .footer-links {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

        /* focus 可访问性 */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(124, 58, 237, 0.5);
            outline-offset: 2px;
        }

/* roulang page: article */
:root {
  --primary: #6366F1;
  --primary-dark: #4F46E5;
  --primary-light: #A5B4FC;
  --accent: #F59E0B;
  --accent-light: #FCD34D;
  --dark: #0F172A;
  --dark-2: #1E293B;
  --bg: #F1F5F9;
  --card-bg: #FFFFFF;
  --text: #1E293B;
  --text-light: #64748B;
  --muted: #94A3B8;
  --border: #E2E8F0;
  --radius-lg: 20px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
  --transition: 0.25s ease;
  --nav-height: 72px;
}

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

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

body {
  margin: 0;
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  line-height: 1.3;
  color: var(--dark);
  font-weight: 700;
}

p { margin: 0 0 1rem; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }

.container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 12px;
  padding: 10px 22px;
  font-size: 0.95rem;
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  color: var(--dark);
  border-color: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-light:hover {
  background: #f8fafc;
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-sm { padding: 8px 16px; font-size: 0.875rem; border-radius: 10px; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; border-radius: 14px; }

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 24px 0;
  pointer-events: none;
}
.dock-nav {
  max-width: 1180px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 28px;
  padding: 10px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 10px 40px rgba(15, 23, 42, 0.10);
  pointer-events: auto;
  position: relative;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--dark);
}
.brand i {
  color: var(--primary);
  font-size: 1.4rem;
}
.brand:hover { color: var(--primary); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 12px;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text);
  transition: all var(--transition);
}
.nav-links a:hover {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}
.nav-links a.active {
  color: #fff;
  background: var(--primary);
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: var(--bg);
  border-radius: 12px;
  color: var(--dark);
  font-size: 1.2rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.nav-toggle:hover { background: var(--primary); color: #fff; }

/* ===== Banner ===== */
.article-banner {
  position: relative;
  padding: 160px 0 70px;
  background-color: var(--dark);
  overflow: hidden;
}
.banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.45;
}
.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.55) 0%, rgba(15, 23, 42, 0.85) 100%);
}
.article-banner .container { position: relative; z-index: 2; }
.breadcrumb-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 0.925rem;
}
.breadcrumb-nav a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition);
}
.breadcrumb-nav a:hover { color: var(--accent-light); }
.breadcrumb-nav .separator { color: rgba(255, 255, 255, 0.35); }
.breadcrumb-nav .current { color: var(--accent-light); font-weight: 500; }
.article-banner h1 {
  font-size: 2.4rem;
  color: #fff;
  max-width: 860px;
  margin-bottom: 18px;
  font-weight: 800;
  line-height: 1.25;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.925rem;
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta i { color: var(--accent); }
.article-meta .category-badge {
  background: rgba(99, 102, 241, 0.25);
  border: 1px solid rgba(99, 102, 241, 0.4);
  color: #C7D2FE;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
}

/* ===== 文章主体 ===== */
.article-main {
  padding: 60px 0 40px;
}
.article-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(226, 232, 240, 0.6);
}
.article-body {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: #334155;
}
.article-body h2 {
  font-size: 1.5rem;
  margin: 2.2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
  color: var(--dark);
}
.article-body h3 {
  font-size: 1.25rem;
  margin: 1.6rem 0 0.8rem;
  color: var(--dark);
}
.article-body p {
  margin-bottom: 1.3rem;
}
.article-body ul,
.article-body ol {
  margin: 0 0 1.3rem 1.4rem;
}
.article-body li {
  margin-bottom: 0.5rem;
}
.article-body img {
  border-radius: var(--radius);
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: #F8FAFC;
  padding: 1rem 1.4rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
  color: var(--text);
  font-style: normal;
}
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body a:hover { color: var(--primary-dark); }
.article-body pre {
  background: var(--dark);
  color: #E2E8F0;
  padding: 1.2rem 1.4rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.925rem;
  margin: 1.5rem 0;
}
.article-body code {
  background: rgba(99, 102, 241, 0.08);
  color: var(--primary-dark);
  padding: 2px 8px;
  border-radius: 6px;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.9em;
}
.article-body pre code { background: transparent; padding: 0; color: inherit; }

.not-found-wrap {
  text-align: center;
  padding: 60px 20px;
}
.not-found-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 20px;
}
.not-found-wrap h2 {
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.not-found-wrap p {
  color: var(--text-light);
  margin-bottom: 30px;
}

/* ===== 侧边栏 ===== */
.article-sidebar {
  position: sticky;
  top: 110px;
}
.sidebar-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, 0.6);
  margin-bottom: 24px;
}
.sidebar-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--bg);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h4 i { color: var(--primary); }
.sidebar-category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-category-list li { margin-bottom: 6px; }
.sidebar-category-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.925rem;
  color: var(--text);
  transition: all var(--transition);
}
.sidebar-category-list a:hover {
  background: rgba(99, 102, 241, 0.06);
  color: var(--primary);
  padding-left: 18px;
}
.sidebar-category-list a.active {
  background: var(--primary);
  color: #fff;
  font-weight: 500;
}
.sidebar-post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-post-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--bg);
}
.sidebar-post-list li:last-child { border-bottom: none; }
.sidebar-post-list a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--text);
  transition: all var(--transition);
}
.sidebar-post-list a:hover { color: var(--primary); }
.post-title { font-size: 0.925rem; font-weight: 500; line-height: 1.4; }
.post-date { font-size: 0.8rem; color: var(--muted); }
.empty-text { color: var(--muted); font-size: 0.9rem; text-align: center; padding: 12px 0; }

/* ===== 相关推荐 ===== */
.related-section {
  padding: 60px 0 50px;
  background: var(--card-bg);
}
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-header .section-tag {
  display: inline-block;
  background: rgba(99, 102, 241, 0.08);
  color: var(--primary);
  padding: 5px 18px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.section-header h2 {
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 6px;
}
.section-header p {
  color: var(--text-light);
}
.related-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, 0.6);
  height: 100%;
  transition: all var(--transition);
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(99, 102, 241, 0.2);
}
.related-card-img {
  display: block;
  height: 180px;
  overflow: hidden;
}
.related-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.related-card:hover .related-card-img img {
  transform: scale(1.06);
}
.related-card-body {
  padding: 20px 20px 24px;
}
.related-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}
.related-card-body h3 a { color: var(--dark); }
.related-card-body h3 a:hover { color: var(--primary); }
.related-card-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--muted);
}
.related-card-meta span { display: inline-flex; align-items: center; gap: 4px; }
.related-card-meta i { color: var(--primary); }

/* ===== FAQ ===== */
.faq-section {
  padding: 70px 0;
  background: var(--bg);
}
.faq-section .section-header {
  margin-bottom: 36px;
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px 30px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, 0.6);
  transition: all var(--transition);
}
.faq-item:hover {
  box-shadow: var(--shadow);
  border-color: rgba(99, 102, 241, 0.15);
}
.faq-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.faq-item h4 i {
  color: var(--primary);
  font-size: 0.9rem;
}
.faq-item p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section {
  padding: 70px 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.3) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -80%;
  left: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-box {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}
.cta-box h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-box p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.05rem;
  margin-bottom: 28px;
}
.cta-box .btn { font-size: 1rem; }

/* ===== 页脚 ===== */
.site-footer {
  background: #0B1222;
  color: #94A3B8;
  padding: 60px 0 24px;
}
.footer-links {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .brand {
  color: #fff;
  font-size: 1.2rem;
}
.footer-brand .brand i { color: var(--primary-light); }
.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 14px;
  max-width: 320px;
}
.footer-col h5 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a {
  color: #94A3B8;
  font-size: 0.9rem;
  transition: all var(--transition);
}
.footer-col ul a:hover { color: var(--accent-light); padding-left: 4px; }
.social-links {
  display: flex;
  gap: 10px;
}
.social-links a {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  color: #94A3B8;
  font-size: 1rem;
  transition: all var(--transition);
}
.social-links a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 22px;
  font-size: 0.85rem;
  color: #64748B;
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .dock-nav {
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 16px;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    justify-content: center;
    padding: 10px 16px;
  }
  .article-banner { padding: 140px 0 56px; }
  .article-banner h1 { font-size: 1.9rem; }
  .article-main { padding: 40px 0 30px; }
  .article-card { padding: 32px; }
  .article-sidebar { position: static; margin-top: 24px; }
  .footer-links { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767.98px) {
  .site-header { padding: 12px 14px 0; }
  .dock-nav { border-radius: 20px; padding: 10px 14px; }
  .brand { font-size: 1rem; }
  .brand i { font-size: 1.2rem; }
  .nav-actions .btn { padding: 7px 14px; font-size: 0.85rem; }
  .article-banner { padding: 120px 0 44px; }
  .article-banner h1 { font-size: 1.5rem; }
  .article-meta { gap: 10px; font-size: 0.85rem; }
  .article-card { padding: 24px 18px; }
  .article-body { font-size: 0.975rem; line-height: 1.8; }
  .article-body h2 { font-size: 1.25rem; }
  .article-body h3 { font-size: 1.1rem; }
  .section-header h2 { font-size: 1.5rem; }
  .cta-box h2 { font-size: 1.5rem; }
  .cta-box p { font-size: 0.95rem; }
  .footer-links { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
  .related-card-img { height: 160px; }
}

@media (max-width: 520px) {
  .dock-nav .nav-actions .btn { display: none; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
  .breadcrumb-nav { flex-wrap: wrap; font-size: 0.85rem; }
  .article-card { padding: 18px 14px; }
  .faq-item { padding: 18px 18px; }
}