/* roulang page: index */
:root {
  --primary: #00d4ff;
  --primary-dark: #00a8cc;
  --primary-glow: rgba(0, 212, 255, 0.35);
  --accent: #7c3aed;
  --accent-glow: rgba(124, 58, 237, 0.3);
  --hot: #ff4d6d;
  --hot-glow: rgba(255, 77, 109, 0.25);
  --bg-dark: #0b0e14;
  --bg-deeper: #070a10;
  --bg-card: #121826;
  --bg-card-hover: #182032;
  --border-dark: rgba(255, 255, 255, 0.08);
  --border-light: rgba(0, 212, 255, 0.25);
  --text-main: #e2e8f0;
  --text-weak: #8b98ab;
  --text-faint: #5a6678;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 999px;
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 28px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px var(--primary-glow);
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 28px;
  --space-lg: 44px;
  --space-xl: 64px;
  --space-2xl: 88px;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-md: 18px;
  --font-size-lg: 22px;
  --font-size-xl: 28px;
  --font-size-2xl: 36px;
  --font-size-3xl: 44px;
  --container-max: 1200px;
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.35s ease;
}

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

html { scroll-behavior: smooth; }

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

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

a { color: var(--primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: #fff; }

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

input, textarea { font-family: inherit; }

ul, ol { list-style: none; }

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

/* 实时状态条 */
.top-status-bar {
  background: linear-gradient(90deg, var(--accent), var(--primary) 50%, var(--hot));
  padding: 6px 0;
  overflow: hidden;
  white-space: nowrap;
  position: relative;
  z-index: 100;
}
.top-status-bar .status-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  font-size: var(--font-size-xs);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.5px;
  animation: statusSlide 28s linear infinite;
}
.top-status-bar .pulse-dot {
  width: 7px;
  height: 7px;
  background: #fff;
  border-radius: 50%;
  display: inline-block;
  margin-right: 4px;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.8);
  animation: pulse 1.5s infinite;
}
.top-status-bar .separator { opacity: 0.6; }
@keyframes statusSlide {
  0% { transform: translateX(20%); }
  50% { transform: translateX(-20%); }
  100% { transform: translateX(20%); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

/* Header / Nav */
.site-header {
  background: rgba(7, 10, 16, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-dark);
  position: sticky;
  top: 0;
  z-index: 999;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
  white-space: nowrap;
}
.logo .logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 0 18px var(--primary-glow);
  flex-shrink: 0;
}
.logo .logo-text { background: linear-gradient(90deg, var(--primary), #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav .nav-link {
  position: relative;
  padding: 8px 16px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-weak);
  border-radius: var(--radius-full);
  transition: all var(--transition-smooth);
  letter-spacing: 0.3px;
}
.main-nav .nav-link:hover { color: #fff; background: rgba(255, 255, 255, 0.06); }
.main-nav .nav-link.active {
  color: var(--primary);
  background: rgba(0, 212, 255, 0.08);
  box-shadow: inset 0 0 0 1px var(--border-light), 0 0 20px rgba(0, 212, 255, 0.1);
}
.main-nav .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
}
.header-cta {
  padding: 9px 22px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  white-space: nowrap;
  transition: all var(--transition-smooth);
  box-shadow: 0 4px 18px rgba(0, 212, 255, 0.2);
}
.header-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 30px var(--primary-glow); color: #fff; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; border-radius: 6px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text-main); border-radius: 2px; transition: all var(--transition-fast); }
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Hero */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 100px 0 80px;
  isolation: isolate;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(7, 10, 16, 0.94) 0%, rgba(7, 10, 16, 0.82) 45%, rgba(18, 24, 38, 0.6) 100%);
  z-index: -1;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.12), transparent 50%);
  z-index: -1;
}
.hero-content { max-width: 680px; }
.hero .hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero h1 {
  font-size: var(--font-size-3xl);
  line-height: 1.25;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero h1 .gradient-text {
  background: linear-gradient(90deg, var(--primary), #a78bfa, var(--hot));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero .hero-sub {
  font-size: var(--font-size-md);
  color: var(--text-weak);
  margin-bottom: 32px;
  max-width: 540px;
  line-height: 1.8;
}
.hero-buttons { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  transition: all var(--transition-smooth);
  letter-spacing: 0.5px;
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 24px rgba(0, 212, 255, 0.25);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 36px var(--primary-glow); color: #fff; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-light);
  color: var(--primary);
}
.btn-outline:hover { background: rgba(0, 212, 255, 0.06); border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
.hero-stats { display: flex; gap: 32px; margin-top: 44px; flex-wrap: wrap; }
.hero-stats .hs-item { display: flex; flex-direction: column; gap: 2px; }
.hero-stats .hs-num {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: #fff;
  background: linear-gradient(90deg, var(--primary), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stats .hs-label { font-size: var(--font-size-xs); color: var(--text-faint); letter-spacing: 1px; }

/* Section 通用 */
.section { padding: var(--space-2xl) 0; }
.section-deep { background: var(--bg-deeper); }
.section-head { text-align: center; margin-bottom: var(--space-xl); }
.section-head .section-tag {
  display: inline-block;
  padding: 5px 16px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 2px;
}
.section-head h2 {
  font-size: var(--font-size-2xl);
  color: #fff;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-head p { color: var(--text-weak); font-size: var(--font-size-base); max-width: 560px; margin: 0 auto; }

/* 特色板块 */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition-smooth);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--border-light); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(124, 58, 237, 0.12));
  border: 1px solid var(--border-light);
}
.feature-card h3 { font-size: var(--font-size-md); color: #fff; margin-bottom: 10px; font-weight: 700; }
.feature-card p { font-size: var(--font-size-sm); color: var(--text-weak); line-height: 1.8; }

/* 分类入口板块 */
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-dark);
  transition: all var(--transition-smooth);
}
.category-card:hover { transform: translateY(-8px); box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 212, 255, 0.08); border-color: var(--border-light); }
.category-cover { position: relative; height: 200px; overflow: hidden; }
.category-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .category-cover img { transform: scale(1.05); }
.category-cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(18, 24, 38, 0.9) 100%); }
.category-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 4px 14px;
  background: rgba(0, 212, 255, 0.9);
  color: #071018;
  font-size: var(--font-size-xs);
  font-weight: 700;
  border-radius: var(--radius-full);
  letter-spacing: 1px;
}
.category-body { padding: 24px; }
.category-body h3 { font-size: var(--font-size-md); color: #fff; margin-bottom: 8px; font-weight: 700; }
.category-body p { font-size: var(--font-size-sm); color: var(--text-weak); margin-bottom: 16px; line-height: 1.7; }
.category-link { display: inline-flex; align-items: center; gap: 6px; font-size: var(--font-size-sm); color: var(--primary); font-weight: 600; transition: gap var(--transition-fast); }
.category-link:hover { gap: 12px; color: #fff; }

/* 数据统计 */
.stats-section { background: linear-gradient(135deg, rgba(7, 10, 16, 0.95), rgba(18, 24, 38, 0.9)), url('/assets/images/backpic/back-2.png') center/cover; position: relative; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.stat-item {
  text-align: center;
  padding: 40px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  transition: all var(--transition-smooth);
}
.stat-item:hover { border-color: var(--border-light); box-shadow: var(--shadow-glow); }
.stat-icon { font-size: 30px; margin-bottom: 14px; }
.stat-num { font-size: 40px; font-weight: 800; color: #fff; margin-bottom: 4px; background: linear-gradient(90deg, var(--primary), #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: var(--font-size-sm); color: var(--text-weak); }

/* 资讯列表 */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.news-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-dark);
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-4px); border-color: var(--border-light); box-shadow: var(--shadow-md); }
.news-cover { position: relative; height: 190px; overflow: hidden; flex-shrink: 0; }
.news-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .news-cover img { transform: scale(1.04); }
.news-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  background: rgba(124, 58, 237, 0.9);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
}
.news-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.news-title { font-size: var(--font-size-md); color: #fff; font-weight: 700; margin-bottom: 10px; line-height: 1.5; }
.news-title a { color: #fff; transition: color var(--transition-fast); }
.news-title a:hover { color: var(--primary); }
.news-desc { font-size: var(--font-size-sm); color: var(--text-weak); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.news-meta { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--border-dark); padding-top: 14px; }
.news-time { font-size: var(--font-size-xs); color: var(--text-faint); }
.news-link { font-size: var(--font-size-sm); color: var(--primary); font-weight: 600; transition: all var(--transition-fast); }
.news-link:hover { color: #fff; letter-spacing: 1px; }
.empty-tip {
  text-align: center;
  padding: 40px;
  color: var(--text-weak);
  font-size: var(--font-size-base);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-light);
  grid-column: 1 / -1;
}

/* 流程板块 */
.process-section { position: relative; overflow: hidden; }
.process-section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; }
.process-step { text-align: center; padding: 30px 16px; position: relative; }
.process-step .step-num {
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 0 24px var(--primary-glow);
}
.process-step h3 { font-size: var(--font-size-base); color: #fff; margin-bottom: 8px; font-weight: 700; }
.process-step p { font-size: var(--font-size-sm); color: var(--text-weak); line-height: 1.7; }
.process-step::after {
  content: '→';
  position: absolute;
  top: 50%;
  right: -22px;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 22px;
  opacity: 0.7;
}
.process-step:last-child::after { display: none; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  transition: all var(--transition-smooth);
  cursor: pointer;
}
.faq-item:hover { border-color: var(--border-light); }
.faq-q { display: flex; justify-content: space-between; align-items: center; font-size: var(--font-size-base); color: #fff; font-weight: 600; gap: 16px; }
.faq-q .faq-icon { font-size: 20px; color: var(--primary); flex-shrink: 0; transition: transform var(--transition-smooth); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding-top 0.3s ease; font-size: var(--font-size-sm); color: var(--text-weak); line-height: 1.8; }
.faq-item.open .faq-a { max-height: 400px; padding-top: 14px; }

/* CTA */
.cta-section {
  position: relative;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding: 90px 0;
  isolation: isolate;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background: rgba(7, 10, 16, 0.85); z-index: -1; }
.cta-inner { text-align: center; max-width: 640px; margin: 0 auto; }
.cta-inner h2 { font-size: var(--font-size-2xl); color: #fff; font-weight: 800; margin-bottom: 16px; }
.cta-inner p { color: var(--text-weak); margin-bottom: 32px; font-size: var(--font-size-md); line-height: 1.8; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Footer */
.site-footer { background: var(--bg-deeper); border-top: 1px solid var(--border-dark); padding: 64px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .footer-logo { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.footer-brand .footer-logo .logo-icon { width: 32px; height: 32px; font-size: 15px; }
.footer-brand p { font-size: var(--font-size-sm); color: var(--text-faint); line-height: 1.8; max-width: 320px; }
.footer-col h4 { font-size: var(--font-size-base); color: #fff; font-weight: 700; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: var(--font-size-sm); color: var(--text-weak); transition: all var(--transition-fast); }
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom { border-top: 1px solid var(--border-dark); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: var(--font-size-xs); color: var(--text-faint); }

/* 响应式 */
@media (max-width: 1024px) {
  .features-grid, .category-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .process-step::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero { min-height: 480px; }
  .hero h1 { font-size: 32px; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(7, 10, 16, 0.98);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border-dark);
    display: none;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  }
  .main-nav.open { display: flex; }
  .main-nav .nav-link { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
  .header-cta { display: none; }
  .section { padding: 48px 0; }
  .section-head { margin-bottom: 32px; }
  .hero { padding: 64px 0; }
  .hero h1 { font-size: 28px; }
  .hero-stats { gap: 20px; }
  .features-grid, .category-grid, .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .top-status-bar .status-inner { font-size: 10px; gap: 8px; }
  .stats-grid { gap: 14px; }
  .stat-item { padding: 24px 12px; }
  .stat-num { font-size: 30px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero-buttons .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 14px; }
  .section { padding: 36px 0; }
  .section-head h2 { font-size: 24px; }
  .process-steps { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-buttons .btn { width: 100%; }
  .news-cover { height: 160px; }
}

/* roulang page: category1 */
:root {
  --primary: #00e5a0;
  --primary-dark: #00b87a;
  --primary-glow: rgba(0, 229, 160, 0.35);
  --accent: #ff3d81;
  --accent-glow: rgba(255, 61, 129, 0.3);
  --bg-dark: #070b14;
  --bg-deep: #0a0e1a;
  --bg-card: #111827;
  --bg-card-hover: #0d1526;
  --bg-elevated: #1a2332;
  --text-main: #e8ecf4;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-subtle: #1e293b;
  --border-active: rgba(0, 229, 160, 0.35);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.45);
  --shadow-primary: 0 0 30px rgba(0, 229, 160, 0.15);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --container-w: 1200px;
  --space-section: 100px;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

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

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

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

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 160, 0.1);
  border: 1px solid var(--border-active);
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary-glow);
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(30, 41, 59, 0.6);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  opacity: 0.5;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), #00b3ff);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 0 20px rgba(0, 229, 160, 0.3);
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(90deg, #fff, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.5px;
}

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

.nav-link {
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  position: relative;
  transition: all var(--transition-base);
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(0, 229, 160, 0.08);
  border-color: rgba(0, 229, 160, 0.2);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(0, 229, 160, 0.1);
  border-color: var(--border-active);
  box-shadow: 0 0 20px rgba(0, 229, 160, 0.08);
}

.nav-link.active::before {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px 3px 0 0;
  box-shadow: 0 0 12px var(--primary-glow);
}

.header-cta {
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition-base);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #00b3a0);
  color: #08120d;
  box-shadow: 0 0 25px rgba(0, 229, 160, 0.2);
  border-color: rgba(0, 229, 160, 0.5);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(0, 229, 160, 0.3);
  color: #08120d;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 15px rgba(0, 229, 160, 0.2);
}

.btn-outline {
  background: transparent;
  border-color: var(--border-subtle);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 229, 160, 0.05);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), #ff6b6b);
  color: #fff;
  box-shadow: 0 0 25px rgba(255, 61, 129, 0.2);
  border-color: rgba(255, 61, 129, 0.4);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(255, 61, 129, 0.3);
  color: #fff;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

/* ========== NAV TOGGLE ========== */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 102;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition-base);
}

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

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

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

/* ========== HERO ========== */
.page-hero {
  position: relative;
  padding: 90px 0 140px;
  background: linear-gradient(135deg, rgba(7, 11, 20, 0.85), rgba(7, 11, 20, 0.6)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 229, 160, 0.1), transparent 70%);
  pointer-events: none;
}

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

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 229, 160, 0.12);
  border: 1px solid var(--border-active);
  padding: 8px 22px;
  border-radius: var(--radius-full);
  font-size: 14px;
  color: var(--primary);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge i {
  font-size: 15px;
}

.hero-title {
  font-size: clamp(32px, 5vw, 50px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 22px;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #fff, rgba(255, 255, 255, 0.85));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title .highlight {
  background: linear-gradient(90deg, var(--primary), #00b3ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 36px;
}

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

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 50px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
  justify-content: center;
}

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

.hero-stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ========== LIVE STATUS BAR ========== */
.live-bar {
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: -70px;
  position: relative;
  z-index: 10;
  box-shadow: var(--shadow-lg);
}

.live-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.live-dot {
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
  position: relative;
  animation: pulse 2s infinite;
}

.live-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  animation: ripples 1.5s infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(0, 229, 160, 0.5);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(0, 229, 160, 0);
  }
}

@keyframes ripples {
  0% {
    transform: scale(0.8);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}

.live-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.live-tag {
  background: rgba(0, 229, 160, 0.15);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border-active);
}

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

.live-actions {
  display: flex;
  gap: 12px;
}

/* ========== STEPS SECTION ========== */
.steps-section {
  background: var(--bg-dark);
}

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

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  position: relative;
  transition: all var(--transition-base);
  text-align: center;
}

.step-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 160, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(0, 229, 160, 0.05);
}

.step-num {
  position: absolute;
  top: 18px;
  left: 18px;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), #00b3a0);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #08120d;
  box-shadow: 0 0 20px rgba(0, 229, 160, 0.3);
}

.step-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: rgba(0, 229, 160, 0.1);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  border: 1px solid rgba(0, 229, 160, 0.2);
  transition: all var(--transition-base);
}

.step-card:hover .step-icon {
  background: var(--primary);
  color: #08120d;
  box-shadow: 0 0 30px rgba(0, 229, 160, 0.4);
}

.step-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

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

/* ========== METHODS SECTION ========== */
.methods-section {
  background: var(--bg-deep);
  position: relative;
  overflow: hidden;
}

.methods-section::before {
  content: "";
  position: absolute;
  top: 50%;
  left: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 61, 129, 0.05), transparent 70%);
  pointer-events: none;
}

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

.method-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.method-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 229, 160, 0.3);
}

.method-card-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.method-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.method-card:hover .method-card-image img {
  transform: scale(1.05);
}

.method-card-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 11, 20, 0.9), transparent 60%);
}

.method-card-body {
  padding: 28px;
  position: relative;
  margin-top: -30px;
  z-index: 2;
}

.method-card-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), #00b3ff);
  color: #08120d;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 14px;
  box-shadow: 0 4px 15px rgba(0, 229, 160, 0.3);
}

.method-card-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.method-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
}

.method-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.method-tag {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-muted);
}

.method-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: all var(--transition-base);
}

.method-link:hover {
  color: var(--primary);
  gap: 12px;
}

/* ========== TIPS SECTION ========== */
.tips-section {
  background: var(--bg-dark);
}

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

.tip-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  gap: 20px;
  transition: all var(--transition-base);
}

.tip-card:hover {
  border-color: rgba(0, 229, 160, 0.25);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  transform: translateY(-3px);
}

.tip-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  background: rgba(0, 229, 160, 0.12);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  border: 1px solid rgba(0, 229, 160, 0.2);
}

.tip-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* ========== FAQ SECTION ========== */
.faq-section {
  background: var(--bg-deep);
  position: relative;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: rgba(0, 229, 160, 0.25);
}

.faq-question {
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 16px;
  user-select: none;
}

.faq-question h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.faq-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--primary);
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  border-color: var(--primary);
  background: rgba(0, 229, 160, 0.15);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 28px;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 28px 24px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-top: 16px;
  border-top: 1px solid rgba(30, 41, 59, 0.5);
}

/* ========== CTA SECTION ========== */
.cta-section {
  padding: 90px 0;
  background: linear-gradient(135deg, rgba(0, 229, 160, 0.08), rgba(255, 61, 129, 0.05)), var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0, 229, 160, 0.08), transparent 60%);
  pointer-events: none;
}

.cta-box {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.cta-box::after {
  content: "";
  position: absolute;
  bottom: -60px;
  right: -60px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(0, 229, 160, 0.15), transparent 70%);
  pointer-events: none;
}

.cta-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  background: linear-gradient(135deg, var(--primary), #00b3ff);
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  box-shadow: 0 0 40px rgba(0, 229, 160, 0.3);
}

.cta-box h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-box p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ========== FOOTER ========== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-subtle);
  padding: 70px 0 0;
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.3;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 50px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(30, 41, 59, 0.5);
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.9;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-main);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.footer-col ul li a::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0;
  transition: all var(--transition-base);
}

.footer-col ul li a:hover::before {
  opacity: 1;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  gap: 16px;
  flex-wrap: wrap;
}

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

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  :root {
    --space-section: 70px;
  }

  .container {
    padding: 0 20px;
  }

  .hero-stats {
    gap: 28px;
  }

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

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

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

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(7, 11, 20, 0.98);
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.4s ease;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
  }

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

  .main-nav .nav-link {
    width: 100%;
    text-align: center;
  }

  .nav-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .page-hero {
    padding: 60px 0 100px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
  }

  .hero-stats {
    gap: 20px;
  }

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

  .live-bar {
    padding: 18px;
    flex-direction: column;
    align-items: flex-start;
  }

  .live-actions {
    width: 100%;
    flex-wrap: wrap;
  }

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

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

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

  .cta-box {
    padding: 40px 24px;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    padding: 20px 0;
  }
}

@media (max-width: 520px) {
  .logo-text {
    font-size: 16px;
  }

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

  .section-desc {
    font-size: 15px;
  }

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

  .hero-desc {
    font-size: 15px;
  }

  .step-card {
    padding: 24px 18px;
  }

  .tip-card {
    flex-direction: column;
    padding: 24px;
    gap: 12px;
  }

  .faq-question {
    padding: 18px 20px;
  }

  .faq-answer p {
    font-size: 13px;
  }

  .cta-box h2 {
    font-size: 22px;
  }

  .cta-box p {
    font-size: 14px;
  }
}

/* ========== ACCESSIBILITY ========== */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 4px;
}

/* ========== FLOATING DECORATIONS ========== */
.float-shape {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #00e5ff;
  --primary-dark: #00b8d9;
  --primary-glow: rgba(0, 229, 255, 0.35);
  --secondary: #7b2ff7;
  --secondary-glow: rgba(123, 47, 247, 0.35);
  --bg-deep: #080c16;
  --bg-body: #0b0f1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2134;
  --bg-surface: #0f1524;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --text-weak: #64748b;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(0, 229, 255, 0.3);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 28px rgba(0, 229, 255, 0.18);
  --space-section: 88px;
  --space-inner: 24px;
  --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== Reset / Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg-body);
  /* 渐变星空底 */
  background-image: radial-gradient(ellipse at 20% 20%, rgba(123, 47, 247, 0.12) 0%, transparent 50%),
                    radial-gradient(ellipse at 80% 0%, rgba(0, 229, 255, 0.08) 0%, transparent 50%),
                    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-body) 40%, var(--bg-deep) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color 0.25s ease; }
a:hover { color: #66f0ff; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

/* ===== 容器 ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(8, 12, 22, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 0 16px var(--primary-glow);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.3s ease;
}
.nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: all 0.3s ease;
  white-space: nowrap;
  cursor: pointer;
  line-height: 1.4;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0, 229, 255, 0.4);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--primary);
}
.btn-outline:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.header-cta {
  padding: 8px 22px;
  font-size: 14px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 992px) {
  .main-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(10, 15, 26, 0.97);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    display: none;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(20px);
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 14px 16px; }
  .nav-link.active::after { display: none; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
}

/* ===== 页面 Hero ===== */
.page-hero {
  position: relative;
  padding: 72px 0 56px;
  background-image: linear-gradient(rgba(8, 12, 22, 0.82), rgba(8, 12, 22, 0.9)),
                    url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.15), transparent 70%);
  pointer-events: none;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.3s;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-weak); }
.breadcrumb .current { color: var(--primary); }
.page-hero h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-main);
  max-width: 860px;
  letter-spacing: 0.5px;
}
.page-hero .hero-subtitle {
  margin-top: 12px;
  font-size: 15px;
  color: var(--text-muted);
  max-width: 700px;
  line-height: 1.6;
}
.hero-tags {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}
@media (max-width: 768px) {
  .page-hero { padding: 48px 0 38px; }
  .page-hero h1 { font-size: 24px; }
}

/* ===== 文章主体 ===== */
.article-section {
  padding: var(--space-section) 0;
}
.article-layout {
  max-width: 880px;
  margin: 0 auto;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 42px 48px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), transparent);
  opacity: 0.8;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.badge {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid var(--border-strong);
  color: var(--primary);
}
.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
}
.meta-item i {
  font-style: normal;
  opacity: 0.7;
}
.article-cover {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 30px;
  border: 1px solid var(--border);
}
.article-cover img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.article-cover:hover img { transform: scale(1.02); }

.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-main);
}
.article-body p {
  margin-bottom: 20px;
}
.article-body h2,
.article-body h3 {
  margin-top: 32px;
  margin-bottom: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
}
.article-body h2 {
  font-size: 24px;
  padding-left: 14px;
  border-left: 3px solid var(--primary);
}
.article-body h3 { font-size: 19px; }
.article-body ul, .article-body ol {
  margin: 0 0 20px 24px;
}
.article-body li {
  margin-bottom: 8px;
}
.article-body img {
  border-radius: var(--radius-md);
  margin: 20px 0;
  border: 1px solid var(--border);
}
.article-body blockquote {
  margin: 24px 0;
  padding: 16px 24px;
  border-left: 3px solid var(--primary);
  background: rgba(0, 229, 255, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-body a {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
.article-body th, .article-body td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
}
.article-body th {
  background: rgba(255, 255, 255, 0.04);
  font-weight: 600;
}

/* 文章未找到 */
.article-notfound {
  text-align: center;
  padding: 60px 20px;
}
.notfound-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  font-size: 32px;
  font-weight: 800;
  background: rgba(255, 60, 60, 0.1);
  border: 2px solid rgba(255, 60, 60, 0.4);
  color: #ff5a5a;
}
.article-notfound h2 {
  font-size: 26px;
  margin-bottom: 12px;
  color: var(--text-main);
}
.article-notfound p {
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* 分享条 */
.article-share {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-label {
  font-size: 14px;
  color: var(--text-muted);
}
.share-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all 0.3s ease;
}
.share-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 229, 255, 0.06);
}

@media (max-width: 768px) {
  .article-card { padding: 24px 20px; }
  .article-cover img { height: 200px; }
  .article-meta { gap: 10px; }
}

/* ===== 访问提示条 ===== */
.tips-strip {
  padding: 32px 0 0;
}
.tips-inner {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), rgba(123, 47, 247, 0.06));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 36px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.tips-icon {
  font-size: 36px;
  flex-shrink: 0;
  color: var(--primary);
}
.tips-content {
  flex: 1;
  min-width: 240px;
}
.tips-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
}
.tips-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}
@media (max-width: 768px) {
  .tips-inner { padding: 20px; }
}

/* ===== CTA 区块 ===== */
.cta-section {
  padding: var(--space-section) 0 0;
}
.cta-card {
  position: relative;
  background: linear-gradient(135deg, #0d1428 0%, #131c36 50%, #1a1035 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.2), transparent 70%);
  pointer-events: none;
}
.cta-card h2 {
  position: relative;
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}
.cta-card p {
  position: relative;
  font-size: 15px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 30px;
  line-height: 1.7;
}
.cta-actions {
  position: relative;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
@media (max-width: 768px) {
  .cta-card { padding: 40px 22px; }
  .cta-card h2 { font-size: 22px; }
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
}
.section-header {
  text-align: center;
  margin-bottom: 44px;
}
.section-header .section-tag {
  display: inline-block;
  padding: 4px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid var(--border-strong);
  margin-bottom: 14px;
}
.section-header h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
}
.section-header .section-desc {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 15px;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 28px;
  transition: all 0.3s ease;
  cursor: pointer;
}
.faq-item:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-glow);
}
.faq-item.open {
  border-color: var(--border-strong);
  background: rgba(0, 229, 255, 0.03);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
}
.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid var(--border-strong);
  color: var(--primary);
  transition: all 0.3s ease;
}
.faq-item.open .faq-icon {
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-answer-inner {
  padding-top: 14px;
}
@media (max-width: 768px) {
  .section-header h2 { font-size: 24px; }
  .faq-item { padding: 18px; }
}

/* ===== 最终 CTA ===== */
.final-cta {
  padding: 48px 0 80px;
  text-align: center;
}
.final-cta p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 15px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--primary-glow);
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: var(--text-muted);
  font-size: 14px;
  transition: all 0.3s ease;
}
.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-weak);
}
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 576px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 焦点可见性 ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* roulang page: category2 */
/* ===================== 设计变量 ===================== */
:root {
  --primary: #ff4d6b;
  --primary-light: #ff7a92;
  --primary-dark: #d92c4f;
  --accent: #7c4dff;
  --accent-light: #a68bff;
  --accent-dark: #5b2fd9;
  --bg-dark: #0d0f1c;
  --bg-dark-2: #151830;
  --bg-dark-3: #1e2140;
  --bg-light: #f5f6fc;
  --bg-light-2: #eef0fb;
  --text-light: #ffffff;
  --text-light-dim: #b8bcd8;
  --text-dark: #1c1e33;
  --text-dark-dim: #5a5d78;
  --border-dark: rgba(255, 255, 255, 0.08);
  --border-light: rgba(28, 30, 51, 0.08);
  --glow-primary: 0 0 24px rgba(255, 77, 107, 0.35);
  --glow-accent: 0 0 24px rgba(124, 77, 255, 0.3);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25);
  --shadow-lift: 0 18px 44px rgba(0, 0, 0, 0.35);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --space-section: 80px;
  --space-section-lg: 100px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

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

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

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-light);
  overflow-x: hidden;
}

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================== 导航 ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-2) 100%);
  border-bottom: 1px solid var(--border-dark);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 24px;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 9px;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glow-primary);
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

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

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-light-dim);
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transition: width var(--transition-base);
}

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

.nav-link:hover::after {
  width: 60%;
}

.nav-link.active {
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.nav-link.active::after {
  width: 60%;
  box-shadow: var(--glow-primary);
}

.header-cta {
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 77, 107, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 77, 107, 0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--text-light);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
  border-color: var(--primary);
  background: rgba(255, 77, 107, 0.08);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ===================== Hero ===================== */
.page-banner {
  position: relative;
  padding: 90px 0 80px;
  background: linear-gradient(135deg, rgba(13, 15, 28, 0.92) 0%, rgba(21, 24, 48, 0.88) 60%, rgba(30, 33, 64, 0.9) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: var(--text-light);
  overflow: hidden;
  border-bottom: 1px solid var(--border-dark);
}

.page-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124, 77, 255, 0.25), transparent 70%);
  filter: blur(60px);
}

.page-banner-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
}

.page-banner-content {
  max-width: 640px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 18px;
  backdrop-filter: blur(8px);
}

.badge .dot {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.page-banner h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: 1px;
}

.page-banner h1 span {
  background: linear-gradient(135deg, var(--primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-banner p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
}

.banner-stats {
  display: flex;
  gap: 28px;
  margin-top: 34px;
}

.stat-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  backdrop-filter: blur(10px);
  text-align: center;
}

.stat-item .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-light);
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-item .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 4px;
}

.banner-visual {
  flex-shrink: 0;
  width: 360px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow-lift);
  transform: rotate(2deg);
}

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

.banner-visual .visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 15, 28, 0.8), transparent);
  display: flex;
  align-items: flex-end;
  padding: 22px;
  color: var(--text-light);
  font-size: 14px;
  font-weight: 500;
}

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

.section-alt {
  background: var(--bg-light-2);
}

.section-dark {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-2) 100%);
  color: var(--text-light);
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 50px;
}

.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-dark-dim);
  line-height: 1.7;
}

.section-dark .section-header p {
  color: rgba(255, 255, 255, 0.6);
}

.section-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 100px;
  background: rgba(255, 77, 107, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  border: 1px solid rgba(255, 77, 107, 0.2);
}

.section-dark .section-tag {
  background: rgba(255, 77, 107, 0.15);
  border-color: rgba(255, 77, 107, 0.3);
}

/* ===================== 安全卡片 ===================== */
.security-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.security-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.security-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.security-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

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

.security-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #fff;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 6px 16px rgba(255, 77, 107, 0.25);
}

.security-card:nth-child(2) .security-icon {
  background: linear-gradient(135deg, var(--accent), #4dc9f6);
  box-shadow: 0 6px 16px rgba(124, 77, 255, 0.25);
}

.security-card:nth-child(3) .security-icon {
  background: linear-gradient(135deg, #f6b93d, #f85b1a);
  box-shadow: 0 6px 16px rgba(246, 185, 61, 0.25);
}

.security-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
}

.security-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dark-dim);
  margin: 0;
}

.security-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}

.security-card .card-link i {
  font-size: 12px;
  transition: transform var(--transition-fast);
}

.security-card .card-link:hover i {
  transform: translateX(4px);
}

/* ===================== 安全流程 ===================== */
.process-section {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-2) 50%, var(--bg-dark-3) 100%);
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}

.process-section::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: 20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124, 77, 255, 0.2), transparent 70%);
  filter: blur(50px);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 2;
}

.process-step {
  position: relative;
  padding: 30px 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.process-step:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.step-num {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 16px;
}

.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.process-step p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
  margin: 0;
}

.step-arrow {
  position: absolute;
  top: 50%;
  right: -20px;
  transform: translateY(-50%);
  color: var(--primary-light);
  font-size: 18px;
  z-index: 3;
}

/* ===================== 数据块 ===================== */
.data-band {
  padding: 50px 0;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1530 100%);
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}

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

.data-item .data-num {
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.data-item .data-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
}

/* ===================== 内容列表 ===================== */
.content-section {
  background: var(--bg-light);
}

.content-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.content-visual {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}

.content-visual img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.content-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 15, 28, 0.3), transparent 60%);
  pointer-events: none;
}

.content-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.content-list-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px 20px;
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  cursor: pointer;
}

.content-list-item:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.07);
  transform: translateX(6px);
}

.list-icon {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: rgba(255, 77, 107, 0.08);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
}

.content-list-item:nth-child(2) .list-icon {
  background: rgba(124, 77, 255, 0.08);
  color: var(--accent);
}

.content-list-item:nth-child(3) .list-icon {
  background: rgba(246, 185, 61, 0.12);
  color: #d49a13;
}

.list-text {
  flex: 1;
}

.list-text h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 5px;
}

.list-text p {
  font-size: 14px;
  color: var(--text-dark-dim);
  margin: 0;
}

/* ===================== FAQ ===================== */
.faq-section {
  background: var(--bg-light-2);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  box-shadow: var(--shadow-card);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.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: 13px;
  color: var(--primary);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

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

.faq-item .faq-body {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-dark-dim);
  line-height: 1.8;
}

/* ===================== CTA ===================== */
.cta-banner {
  background: linear-gradient(135deg, #1e1040, #3a1a60);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 77, 107, 0.3), transparent 70%);
  filter: blur(60px);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124, 77, 255, 0.3), transparent 70%);
  filter: blur(60px);
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 0;
}

.cta-inner h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

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

/* ===================== 页脚 ===================== */
.site-footer {
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-dark-2));
  color: var(--text-light);
  border-top: 1px solid var(--border-dark);
  padding: 60px 0 30px;
}

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

.footer-brand {
  max-width: 360px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--text-light);
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

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

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

/* ===================== 响应式 ===================== */
@media (max-width: 1024px) {
  .page-banner h1 {
    font-size: 36px;
  }

  .banner-visual {
    width: 280px;
  }

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

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }

  .step-arrow {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 50px;
    --space-section-lg: 60px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background: var(--bg-dark-2);
    border-radius: var(--radius-md);
    padding: 12px;
    margin-top: 12px;
  }

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

  .nav-link {
    width: 100%;
    padding: 10px 14px;
  }

  .header-cta {
    display: none;
  }

  .page-banner {
    padding: 50px 0;
  }

  .page-banner-inner {
    flex-direction: column;
  }

  .page-banner h1 {
    font-size: 28px;
  }

  .banner-visual {
    width: 100%;
    max-width: 360px;
  }

  .banner-stats {
    flex-wrap: wrap;
    gap: 12px;
  }

  .stat-item {
    padding: 14px 18px;
  }

  .stat-item .num {
    font-size: 22px;
  }

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

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

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

  .content-wrapper {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .content-visual img {
    height: 300px;
  }

  .cta-inner h2 {
    font-size: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

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

  .page-banner h1 {
    font-size: 24px;
  }

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

  .banner-stats {
    flex-direction: column;
    gap: 8px;
  }

  .stat-item {
    width: 100%;
    text-align: center;
  }

  .section-header h2 {
    font-size: 24px;
  }

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

  .cta-buttons {
    flex-direction: column;
    gap: 10px;
  }

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

/* ===================== 焦点状态 ===================== */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
:root {
  --primary: #00e5ff;
  --primary-dark: #00b8d4;
  --primary-glow: rgba(0, 229, 255, 0.35);
  --accent: #9d7bff;
  --accent-glow: rgba(157, 123, 255, 0.3);
  --bg-deep: #070b14;
  --bg-body: #0a0e1a;
  --bg-card: #111a2e;
  --bg-card-hover: #16203a;
  --bg-soft: #0d1424;
  --text-primary: #e8ecf4;
  --text-secondary: #9aa4b8;
  --text-muted: #5c6a82;
  --border: rgba(255, 255, 255, 0.07);
  --border-neon: rgba(0, 229, 255, 0.25);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.12);
  --space-section: 100px;
  --container-w: 1240px;
  --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== Reset / Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-main);
  background: var(--bg-body);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.25s ease;
}
a:hover {
  color: var(--primary-dark);
}
img {
  max-width: 100%;
  display: block;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
ul, ol {
  list-style: none;
}

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

/* ===== Header 导航（暗色霓虹） ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: #051018;
  box-shadow: 0 0 20px var(--primary-glow);
}
.logo-text {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, #fff, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  position: relative;
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color 0.25s, background 0.25s;
}
.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(0, 229, 255, 0.08);
  text-shadow: 0 0 12px var(--primary-glow);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
}
.header-cta {
  margin-left: 12px;
  flex-shrink: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #00c4ff);
  color: #051018;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.45);
  transform: translateY(-2px);
  color: #051018;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.3);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(0, 229, 255, 0.5);
  outline-offset: 2px;
}
.btn-outline {
  border-color: var(--border-neon);
  color: var(--primary);
  background: transparent;
}
.btn-outline:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--primary-glow);
  color: var(--primary);
}
.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
  border-radius: 12px;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: translateY(-2px);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero / Banner ===== */
.page-hero {
  position: relative;
  padding: 110px 0 90px;
  background:
    linear-gradient(135deg, rgba(7, 11, 20, 0.92), rgba(10, 14, 26, 0.85)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(0, 229, 255, 0.1), transparent 60%);
  pointer-events: none;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid var(--border-neon);
  border-radius: 100px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 22px;
  letter-spacing: 0.04em;
}
.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.page-hero h1 {
  font-size: 48px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  background: linear-gradient(90deg, #fff, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-meta-row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 50px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}
.hero-meta-item i {
  color: var(--primary);
  font-size: 16px;
}

/* ===== 实时状态条 ===== */
.status-bar-section {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.status-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.status-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.status-label .live-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #00ffa3;
  box-shadow: 0 0 10px rgba(0, 255, 163, 0.6);
  animation: pulse 1.2s infinite;
}
.status-items {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  flex: 1;
}
.status-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}
.status-item .status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #00ffa3;
  box-shadow: 0 0 6px rgba(0, 255, 163, 0.5);
}
.status-item .status-dot.warn {
  background: #ffb300;
  box-shadow: 0 0 6px rgba(255, 179, 0, 0.5);
}
.status-time {
  font-size: 13px;
  color: var(--text-muted);
  margin-left: auto;
  font-variant-numeric: tabular-nums;
}

/* ===== 快捷访问方式卡片 ===== */
.section {
  padding: var(--space-section) 0;
}
.section-alt {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid var(--border-neon);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.section-head h2 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  color: #fff;
}
.section-head p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
}
.access-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.access-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 36px 28px 30px;
  position: relative;
  overflow: hidden;
  transition: all 0.35s ease;
}
.access-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.6;
  transition: opacity 0.3s;
}
.access-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-neon);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}
.access-card:hover::before {
  opacity: 1;
}
.access-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(157, 123, 255, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 22px;
  border: 1px solid var(--border-neon);
}
.access-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.access-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 18px;
}
.access-card .card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.access-card .card-meta .badge {
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
}
.badge-green {
  background: rgba(0, 255, 163, 0.12);
  color: #00ffa3;
  border: 1px solid rgba(0, 255, 163, 0.2);
}
.badge-blue {
  background: rgba(0, 229, 255, 0.12);
  color: var(--primary);
  border: 1px solid var(--border-neon);
}
.badge-purple {
  background: rgba(157, 123, 255, 0.12);
  color: var(--accent);
  border: 1px solid rgba(157, 123, 255, 0.3);
}

/* ===== 访问流程 ===== */
.steps-section {
  position: relative;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  counter-reset: step;
}
.step-item {
  position: relative;
  padding: 30px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.step-item:hover {
  border-color: var(--border-neon);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.step-num {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 14px;
  line-height: 1;
}
.step-item h3 {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.step-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}
.step-arrow {
  position: absolute;
  top: 50%;
  right: -28px;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 22px;
  opacity: 0.5;
  z-index: 2;
}
.step-item:last-child .step-arrow {
  display: none;
}

/* ===== 数据统计 ===== */
.stats-section {
  background:
    linear-gradient(135deg, rgba(7, 11, 20, 0.94), rgba(13, 20, 36, 0.92)),
    url('/assets/images/backpic/back-2.png') center/cover fixed no-repeat;
  padding: 80px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
  text-align: center;
}
.stat-item {
  padding: 10px;
}
.stat-number {
  font-size: 44px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}
.stat-number em {
  font-style: normal;
  color: var(--primary);
  font-size: 24px;
  margin-left: 2px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}
.stat-item + .stat-item {
  border-left: 1px solid var(--border);
}

/* ===== 热门入口推荐 ===== */
.recommend-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.recommend-card {
  display: flex;
  gap: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 18px;
  transition: all 0.3s ease;
  align-items: center;
}
.recommend-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--border-neon);
}
.recommend-card .cover-img {
  width: 140px;
  height: 100px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
}
.recommend-info {
  flex: 1;
  min-width: 0;
}
.recommend-info h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.recommend-info p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.recommend-tag-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item:hover {
  border-color: var(--border-neon);
}
.faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  list-style: none;
  transition: background 0.25s;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  font-size: 24px;
  font-weight: 300;
  color: var(--primary);
  transition: transform 0.3s;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item[open] summary {
  border-bottom: 1px solid var(--border);
}
.faq-answer {
  padding: 18px 24px 22px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  background: rgba(255, 255, 255, 0.02);
}

/* ===== CTA ===== */
.cta-section {
  background:
    linear-gradient(135deg, rgba(7, 11, 20, 0.9), rgba(13, 20, 36, 0.9)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding: 80px 0;
  position: relative;
  border-top: 1px solid var(--border);
  text-align: center;
}
.cta-inner {
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.cta-inner p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 30px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-note {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--border);
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 380px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
  border-radius: 2px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: all 0.25s;
}
.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root {
    --space-section: 70px;
  }
  .page-hero h1 {
    font-size: 38px;
  }
  .access-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .stat-item:nth-child(2) {
    border-left: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(7, 11, 20, 0.98);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    gap: 6px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }
  .nav-link.active::after {
    display: none;
  }
  .nav-link.active {
    background: rgba(0, 229, 255, 0.1);
  }
  .nav-toggle {
    display: flex;
  }
  .header-cta {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 55px;
  }
  .page-hero {
    padding: 70px 0 50px;
  }
  .page-hero h1 {
    font-size: 30px;
  }
  .page-hero p {
    font-size: 15px;
  }
  .access-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .step-arrow {
    display: none;
  }
  .recommend-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .stat-number {
    font-size: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .status-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .status-time {
    margin-left: 0;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .header-inner {
    height: 64px;
  }
  .page-hero h1 {
    font-size: 26px;
  }
  .page-hero p {
    font-size: 14px;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-item + .stat-item {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-top: 20px;
  }
  .recommend-card {
    flex-direction: column;
  }
  .recommend-card .cover-img {
    width: 100%;
    height: 150px;
  }
  .cta-inner h2 {
    font-size: 26px;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
}

/* ===== 动效 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.section {
  animation: fadeInUp 0.6s ease-out both;
}
.section:nth-of-type(2) {
  animation-delay: 0.1s;
}
.section:nth-of-type(3) {
  animation-delay: 0.2s;
}
.section:nth-of-type(4) {
  animation-delay: 0.3s;
}