/* roulang page: index */
:root {
  --bg-dark: #0B0F19;
  --bg-light: #F7F8FA;
  --bg-white: #FFFFFF;
  --primary: #27E0C8;
  --primary-dark: #1FC4AF;
  --accent: #F5A623;
  --accent-light: #FBBF24;
  --neon: #7C5CFF;
  --text-main: #1F2937;
  --text-sub: #6B7280;
  --text-light: #E5E7EB;
  --text-muted: #9CA3AF;
  --border-light: #E5E7EB;
  --border-dark: rgba(255,255,255,0.12);
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-dark: 0 8px 24px rgba(0,0,0,0.5);
  --font-cn: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Roboto Mono", monospace;
  --spacing-section: 96px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  background: var(--bg-light);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }
.main-wrap { margin-left: 264px; min-height: 100vh; }
.section-pad { padding: var(--spacing-section) 0; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: all .25s ease;
  border: 1px solid transparent;
  min-height: 44px;
}
.btn:focus-visible { outline: 3px solid rgba(39,224,200,0.4); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #0B0F19; }
.btn-primary:hover { background: #3ee8d2; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(39,224,200,0.25); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(39,224,200,0.1); transform: translateY(-2px); }
.btn-outline-dark { background: transparent; border-color: var(--text-sub); color: var(--text-main); }
.btn-outline-dark:hover { border-color: var(--text-main); background: #f3f4f6; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(245,166,35,0.3); }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-light { background: #fff; color: var(--text-main); }
.btn-light:hover { background: #f0f0f0; transform: translateY(-2px); }

/* ===== 区块头部 ===== */
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head.left { text-align: left; margin-left: 0; }
.section-tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(39,224,200,0.1);
  color: #0d9488;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-tag.light { background: rgba(39,224,200,0.15); color: var(--primary); }
.section-head h2 { font-size: 34px; font-weight: 700; line-height: 1.2; color: var(--text-main); margin-bottom: 16px; }
.section-head p { color: var(--text-sub); font-size: 16px; }

/* ===== 左侧导航 ===== */
.side-nav {
  position: fixed;
  left: 0; top: 0;
  width: 264px; height: 100vh;
  background: var(--bg-dark);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-dark);
  overflow-y: auto;
}
.side-nav::-webkit-scrollbar { width: 4px; }
.side-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
.side-brand {
  padding: 24px 24px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.side-logo {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  line-height: 1.2;
  display: flex;
  align-items: center;
}
.side-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--primary);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #0B0F19; font-size: 18px;
  margin-right: 10px;
}
.side-logo .logo-neon {
  color: var(--primary);
  text-shadow: 0 0 12px rgba(39,224,200,0.5);
}
.side-subdomain {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: var(--font-num);
  letter-spacing: 0.5px;
}
.side-nav-group { padding: 20px 16px; flex: 1; }
.side-group-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 0 12px;
  margin-bottom: 8px;
}
.side-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: all .2s ease;
  border-left: 3px solid transparent;
  margin-bottom: 2px;
}
.side-link i { width: 22px; text-align: center; font-size: 15px; }
.side-link:hover { color: #fff; background: rgba(255,255,255,0.04); }
.side-link.active {
  color: var(--primary);
  background: rgba(39,224,200,0.08);
  border-left-color: var(--primary);
}
.side-nav-group .divider {
  height: 1px;
  background: rgba(255,255,255,0.06);
  margin: 14px 12px;
}
.side-footer {
  padding: 20px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.side-copyright {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}
.side-mini-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #0B0F19;
  font-weight: 600;
  font-size: 14px;
  padding: 10px 16px;
  border-radius: 10px;
  transition: all .25s;
}
.side-mini-cta:hover { background: var(--primary-dark); }

/* ===== 移动端导航 ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1001;
  height: 60px;
  background: rgba(11,15,25,0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.mobile-logo {
  display: flex; align-items: center; gap: 8px;
  color: #fff; font-weight: 700; font-size: 18px;
}
.mobile-logo .logo-icon {
  width: 30px; height: 30px;
  background: var(--primary); color: #0B0F19;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
}
.mobile-logo .logo-neon { color: var(--primary); }
.burger {
  width: 40px; height: 40px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 5px;
  border-radius: 8px;
}
.burger span {
  display: block;
  width: 20px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all .3s;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-drawer {
  position: fixed;
  top: 0; right: -320px;
  width: 300px; height: 100vh;
  background: var(--bg-dark);
  z-index: 1002;
  padding: 24px;
  transition: right .3s ease;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.mobile-drawer.open { right: 0; }
.drawer-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100vh;
  background: rgba(0,0,0,0.6);
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: all .3s;
}
.drawer-overlay.show { opacity: 1; visibility: visible; }
.mobile-drawer .drawer-logo {
  display: flex; align-items: center; gap: 10px;
  color: #fff; font-size: 20px; font-weight: 700;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.mobile-drawer .drawer-logo .logo-icon {
  width: 34px; height: 34px;
  background: var(--primary); color: #0B0F19;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
}
.mobile-drawer .drawer-logo .logo-neon { color: var(--primary); }
.mobile-drawer .drawer-subdomain {
  font-size: 11px; color: var(--text-muted);
}
.drawer-nav { margin-top: 20px; flex: 1; }
.drawer-link {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 12px;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  border-left: 3px solid transparent;
  transition: all .2s;
}
.drawer-link i { width: 20px; text-align: center; }
.drawer-link:hover { color: #fff; background: rgba(255,255,255,0.04); }
.drawer-link.active { color: var(--primary); border-left-color: var(--primary); background: rgba(39,224,200,0.08); }
.drawer-divider { height: 1px; background: rgba(255,255,255,0.06); margin: 14px 0; }
.drawer-footer { padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.06); }
.drawer-footer .btn { width: 100%; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: var(--bg-dark);
  padding: 100px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}
.hero-glow-1 {
  position: absolute;
  top: -120px; right: -80px;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(39,224,200,0.35), transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}
.hero-glow-2 {
  position: absolute;
  bottom: -100px; left: 40%;
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(124,92,255,0.3), transparent 70%);
  filter: blur(70px);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(39,224,200,0.12);
  border: 1px solid rgba(39,224,200,0.3);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero h1 .hl { color: var(--primary); }
.hero-sub {
  font-size: 17px;
  color: var(--text-light);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 32px;
  opacity: 0.9;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-stats-mini {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.hero-stats-mini span {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-stats-mini i { color: var(--primary); }
.hero-visual {
  position: relative;
}
.hero-visual .main-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(39,224,200,0.3);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 40px rgba(39,224,200,0.1);
}
.hero-visual .main-card img { width: 100%; height: auto; object-fit: cover; }
.hero-visual .float-badge {
  position: absolute;
  top: 20px; right: -12px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #0B0F19;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(245,166,35,0.4);
}
.hero-scroll {
  position: absolute;
  bottom: 16px; left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 18px;
  animation: bounce 2s infinite;
  padding: 8px;
}
@keyframes bounce { 0%,100%{ transform: translateX(-50%) translateY(0); } 50%{ transform: translateX(-50%) translateY(-8px); } }

/* ===== 卖点区 ===== */
.features { background: var(--bg-light); padding: var(--spacing-section) 0; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  border: 1px solid transparent;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(39,224,200,0.25);
}
.feature-icon {
  width: 56px; height: 56px;
  background: rgba(39,224,200,0.1);
  border: 1px solid var(--primary);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  color: #0d9488;
  font-size: 22px;
  margin-bottom: 20px;
  transition: all .3s;
}
.feature-card:hover .feature-icon { background: var(--primary); color: #0B0F19; }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: var(--text-main); }
.feature-card p { font-size: 14px; color: var(--text-sub); line-height: 1.7; margin-bottom: 16px; }
.more-link {
  font-size: 14px;
  font-weight: 600;
  color: #0d9488;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s;
}
.more-link:hover { gap: 10px; }

/* ===== 演示区 ===== */
.demo {
  position: relative;
  background: var(--bg-dark);
  padding: var(--spacing-section) 0;
  overflow: hidden;
}
.demo::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(39,224,200,0.4), transparent);
}
.demo-inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.demo-text h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 16px;
}
.demo-text > p { color: var(--text-light); font-size: 15px; opacity: 0.85; margin-bottom: 28px; }
.demo-list { margin-bottom: 32px; }
.demo-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-light);
  font-size: 15px;
  margin-bottom: 12px;
  line-height: 1.6;
}
.demo-list li i { color: var(--primary); margin-top: 4px; font-size: 13px; }
.browser-frame {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.browser-bar .dot { width: 10px; height: 10px; border-radius: 50%; }
.browser-bar .dot.red { background: #FF5F57; }
.browser-bar .dot.yellow { background: #FEBC2E; }
.browser-bar .dot.green { background: #28C840; }
.browser-url {
  margin-left: 12px;
  background: rgba(255,255,255,0.08);
  border-radius: 6px;
  padding: 3px 14px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-num);
  flex: 1;
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.browser-body { position: relative; }
.browser-body img { width: 100%; height: auto; object-fit: cover; display: block; }
.floating-tag {
  position: absolute;
  bottom: 20px; right: 20px;
  background: rgba(11,15,25,0.8);
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
  display: flex; align-items: center; gap: 6px;
  backdrop-filter: blur(8px);
}
.floating-tag i { font-size: 12px; }

/* ===== 证据区 ===== */
.proof {
  background: var(--bg-light);
  padding: var(--spacing-section) 0;
}
.proof-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}
.stat-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-card);
  border-bottom: 3px solid var(--primary);
}
.stat-num {
  display: block;
  font-family: var(--font-num);
  font-size: 42px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.1;
}
.stat-num .accent { color: #0d9488; }
.stat-label {
  display: block;
  font-size: 14px;
  color: var(--text-sub);
  margin-top: 8px;
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all .3s;
}
.review-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.stars { color: var(--accent); font-size: 13px; margin-bottom: 14px; letter-spacing: 2px; }
.review-card p {
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.7;
  margin-bottom: 18px;
  min-height: 70px;
}
.reviewer { display: flex; align-items: center; gap: 12px; }
.reviewer .avatar {
  width: 38px; height: 38px;
  background: rgba(39,224,200,0.15);
  border: 1px solid var(--primary);
  color: #0d9488;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  font-weight: 700;
}
.reviewer strong { display: block; font-size: 14px; color: var(--text-main); line-height: 1.2; }
.reviewer small { font-size: 12px; color: var(--text-muted); }

/* ===== 价格区 ===== */
.pricing {
  background: var(--bg-light);
  padding: var(--spacing-section) 0;
  border-top: 1px solid var(--border-light);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.price-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all .3s;
}
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.price-card.featured {
  border: 2px solid var(--primary);
  box-shadow: 0 12px 40px rgba(39,224,200,0.15);
  transform: scale(1.02);
}
.price-card.featured:hover { transform: scale(1.02) translateY(-4px); }
.price-badge {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #0B0F19;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(245,166,35,0.35);
}
.price-card h3 { font-size: 20px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.price {
  font-family: var(--font-num);
  font-size: 20px;
  color: var(--text-sub);
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.price span { font-size: 40px; font-weight: 700; color: var(--text-main); }
.price-card ul { margin-bottom: 28px; flex: 1; }
.price-card ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.5;
}
.price-card ul li i { color: var(--primary); font-size: 12px; margin-top: 5px; }
.price-card .btn { width: 100%; }
.pricing-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 32px;
}

/* ===== 资讯区 ===== */
.news {
  background: var(--bg-light);
  padding: var(--spacing-section) 0;
  border-top: 1px solid var(--border-light);
}
.news-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
}
.news-header h2 { font-size: 30px; font-weight: 700; color: var(--text-main); }
.more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #0d9488;
  background: rgba(39,224,200,0.1);
  padding: 9px 20px;
  border-radius: 999px;
  transition: all .25s;
}
.more-btn:hover { background: var(--primary); color: #0B0F19; }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-card);
  transition: all .3s;
  border: 1px solid transparent;
}
.news-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: rgba(39,224,200,0.3);
}
.news-thumb {
  width: 140px; height: 88px;
  border-radius: 10px;
  overflow: hidden;
  background: #e5e7eb;
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-body { display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.news-body h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-body h4:hover { color: #0d9488; }
.news-body p {
  font-size: 14px;
  color: var(--text-sub);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 8px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.news-meta .news-date { display: inline-flex; align-items: center; gap: 5px; }
.news-meta .news-cat {
  display: inline-block;
  background: #f3f4f6;
  padding: 2px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: #374151;
}
.news-meta .news-link {
  color: #0d9488;
  font-weight: 600;
  font-size: 13px;
}
.news-empty {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-lg);
  padding: 64px 24px;
  text-align: center;
  background: var(--bg-white);
}
.news-empty .empty-icon {
  width: 64px; height: 64px;
  background: #f3f4f6;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  color: var(--text-muted);
  margin: 0 auto 16px;
}
.news-empty h4 { font-size: 18px; color: var(--text-main); margin-bottom: 12px; }

/* ===== FAQ ===== */
.faq {
  background: var(--bg-light);
  padding: var(--spacing-section) 0;
  border-top: 1px solid var(--border-light);
}
.faq-inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
}
.faq-head h2 { font-size: 30px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.faq-head p { color: var(--text-sub); font-size: 15px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  padding: 0 20px;
  transition: all .3s;
}
.faq-item.open { border-color: rgba(39,224,200,0.4); box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color .2s;
}
.faq-q:hover { color: #0d9488; }
.faq-q i {
  font-size: 14px;
  color: var(--text-muted);
  transition: transform .3s;
  flex-shrink: 0;
  margin-left: 12px;
}
.faq-item.open .faq-q i { transform: rotate(180deg); color: var(--primary); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-a p {
  padding: 0 0 18px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
}

/* ===== CTA ===== */
.cta {
  background: var(--bg-light);
  padding: var(--spacing-section) 0;
}
.cta-box {
  background: var(--bg-dark);
  padding: 72px 48px;
  border-radius: 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -100px; right: -80px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(39,224,200,0.3), transparent 70%);
  filter: blur(50px);
}
.cta-box::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -60px;
  width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(124,92,255,0.25), transparent 70%);
  filter: blur(50px);
}
.cta-box h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 14px; position: relative; z-index: 1; }
.cta-box p { font-size: 16px; color: var(--text-light); margin-bottom: 32px; opacity: 0.85; position: relative; z-index: 1; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-dark);
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-logo .logo-icon {
  width: 32px; height: 32px;
  background: var(--primary); color: #0B0F19;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
}
.footer-logo .logo-neon { color: var(--primary); }
.footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.75; margin-bottom: 8px; }
.footer-brand .domain-info { font-family: var(--font-num); font-size: 13px; color: var(--text-muted); }
.footer h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color .2s, padding-left .2s;
}
.footer-nav a:hover { color: var(--primary); padding-left: 6px; }
.footer-contact p {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.footer-contact p i { color: var(--primary); width: 16px; text-align: center; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p { font-size: 13px; color: var(--text-muted); }

/* ===== 浮动CTA ===== */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 56px;
  height: 56px;
  background: var(--primary);
  color: #0B0F19;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-dark), 0 0 20px rgba(39,224,200,0.3);
  z-index: 999;
  transition: all .3s;
  cursor: pointer;
}
.float-cta:hover { transform: translateY(-4px); background: var(--primary-dark); }
.float-cta:focus-visible { outline: 3px solid rgba(39,224,200,0.4); outline-offset: 2px; }

/* ===== 响应式 ===== */
@media (max-width: 1279px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 92px 0 72px; }
  .hero h1 { font-size: 38px; }
  .hero-inner { gap: 40px; }
  .cta-box { padding: 56px 32px; }
}
@media (min-width: 768px) and (max-width: 1023px) {
  .side-nav { width: 72px; }
  .side-nav .side-logo span:not(.logo-icon),
  .side-nav .side-subdomain,
  .side-nav .side-link span,
  .side-nav .side-group-label,
  .side-nav .side-copyright,
  .side-nav .side-mini-cta,
  .side-nav .side-footer .btn span { display: none; }
  .side-logo { justify-content: center; }
  .side-link { justify-content: center; padding: 12px 0; }
  .main-wrap { margin-left: 72px; }
  .side-brand { padding: 18px 12px; }
  .side-nav-group { padding: 16px 8px; }
  .side-footer { padding: 14px 8px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .side-nav { display: none; }
  .main-wrap { margin-left: 0; }
  .mobile-header { display: flex; }
  .container { padding: 0 20px; }
  .section-pad { padding: 64px 0; }
  .hero { padding: 64px 0 56px; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-visual .float-badge { right: 8px; }
  .feature-grid { grid-template-columns: 1fr; }
  .demo-inner { grid-template-columns: 1fr; gap: 32px; }
  .demo-list { margin-bottom: 20px; }
  .proof-stats { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .price-card.featured:hover { transform: translateY(-4px); }
  .news-header { flex-direction: column; align-items: flex-start; gap: 14px; }
  .news-item { grid-template-columns: 1fr; }
  .news-thumb { width: 100%; height: 160px; }
  .news-body h4 { white-space: normal; }
  .news-body p { white-space: normal; }
  .faq-inner { grid-template-columns: 1fr; gap: 32px; }
  .cta-box { padding: 48px 24px; }
  .cta-box h2 { font-size: 26px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .float-cta { width: 48px; height: 48px; right: 16px; bottom: 16px; font-size: 18px; }
  .section-head h2 { font-size: 24px; }
  .demo-text h2 { font-size: 26px; }
  .news-header h2 { font-size: 26px; }
  .faq-head h2 { font-size: 26px; }
}

/* roulang page: category1 */
:root {
      --bg-dark: #0B0F19;
      --bg-light: #F7F8FA;
      --bg-card: #FFFFFF;
      --primary: #27E0C8;
      --accent-orange: #F5A623;
      --accent-purple: #7C5CFF;
      --text-dark: #1F2937;
      --text-gray: #6B7280;
      --text-light: #E5E7EB;
      --border-light: #E5E7EB;
      --border-dark: rgba(255,255,255,0.12);
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-display: "Alibaba PuHuiTi", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
      --font-mono: "DIN Alternate", "Bahnschrift", "Roboto Mono", monospace;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-dark);
      color: var(--text-dark);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

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

    /* ===== 侧边导航 ===== */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: 264px;
      height: 100vh;
      background: var(--bg-dark);
      border-right: 1px solid rgba(255,255,255,0.08);
      display: flex;
      flex-direction: column;
      z-index: 50;
    }

    .sidebar-brand {
      padding: 24px 24px 16px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 22px;
      font-weight: 700;
      color: #fff;
      font-family: var(--font-display);
    }

    .logo-icon {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background: rgba(39, 224, 200, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 18px;
      border: 1px solid rgba(39, 224, 200, 0.3);
    }

    .logo-neon {
      color: var(--primary);
      text-shadow: 0 0 18px rgba(39, 224, 200, 0.4);
    }

    .brand-domain {
      font-size: 13px;
      color: rgba(255,255,255,0.5);
      margin-top: 6px;
      font-family: var(--font-mono);
      letter-spacing: 0.5px;
    }

    .drawer-nav {
      flex: 1;
      padding: 16px 12px;
      overflow-y: auto;
    }

    .drawer-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      border-radius: 10px;
      color: rgba(255,255,255,0.7);
      font-size: 15px;
      font-weight: 500;
      position: relative;
      transition: all 0.2s ease;
      margin-bottom: 2px;
    }

    .drawer-link i {
      width: 20px;
      text-align: center;
      font-size: 15px;
      color: rgba(255,255,255,0.4);
      transition: color 0.2s ease;
    }

    .drawer-link:hover {
      background: rgba(255,255,255,0.06);
      color: #fff;
    }

    .drawer-link:hover i {
      color: var(--primary);
    }

    .drawer-link.active {
      background: rgba(39, 224, 200, 0.1);
      color: var(--primary);
      font-weight: 600;
    }

    .drawer-link.active::before {
      content: "";
      position: absolute;
      left: -12px;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 24px;
      background: var(--primary);
      border-radius: 0 3px 3px 0;
      box-shadow: 0 0 12px rgba(39, 224, 200, 0.6);
    }

    .drawer-link.active i {
      color: var(--primary);
    }

    .drawer-divider {
      height: 1px;
      background: rgba(255,255,255,0.08);
      margin: 16px 8px;
    }

    .sidebar-footer {
      padding: 16px 20px 24px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

    .sidebar-footer p {
      font-size: 13px;
      color: rgba(255,255,255,0.4);
      margin-bottom: 12px;
    }

    /* ===== 移动端顶栏 ===== */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 60px;
      background: rgba(11, 15, 25, 0.95);
      backdrop-filter: blur(8px);
      z-index: 60;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-size: 18px;
      font-weight: 700;
    }

    .mobile-brand .logo-icon {
      width: 34px;
      height: 34px;
      font-size: 15px;
    }

    .menu-toggle {
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      border-radius: 10px;
      transition: background 0.2s;
    }

    .menu-toggle:hover {
      background: rgba(255,255,255,0.08);
    }

    /* ===== 移动端抽屉 ===== */
    .drawer-mask {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.6);
      z-index: 70;
    }

    .drawer-mask.open {
      display: block;
    }

    .drawer-panel {
      display: none;
      position: fixed;
      top: 60px;
      left: 0;
      right: 0;
      background: var(--bg-dark);
      z-index: 70;
      padding: 16px;
      max-height: calc(100vh - 60px);
      overflow-y: auto;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .drawer-panel.open {
      display: block;
    }

    .drawer-panel .drawer-link.active::before {
      left: -8px;
    }

    /* ===== 主内容区 ===== */
    .main-wrapper {
      margin-left: 264px;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 600;
      transition: all 0.2s ease;
      cursor: pointer;
      min-height: 44px;
      line-height: 1.2;
    }

    .btn:focus-visible {
      outline: 3px solid rgba(39,224,200,0.4);
      outline-offset: 2px;
    }

    .btn-primary {
      background: var(--primary);
      color: #0B0F19;
    }

    .btn-primary:hover {
      background: #3af0d8;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(39,224,200,0.25);
    }

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

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
    }

    .btn-outline:hover {
      background: rgba(39,224,200,0.1);
      transform: translateY(-2px);
    }

    .btn-orange {
      background: var(--accent-orange);
      color: #0B0F19;
    }

    .btn-orange:hover {
      background: #fbbf24;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(245,166,35,0.3);
    }

    .btn-outline-light {
      background: transparent;
      border: 2px solid rgba(255,255,255,0.4);
      color: #fff;
    }

    .btn-outline-light:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(39,224,200,0.08);
    }

    .btn-sm {
      padding: 8px 20px;
      font-size: 14px;
      min-height: 38px;
    }

    /* ===== Hero ===== */
    .hero {
      position: relative;
      padding: 80px 24px 80px;
      background: var(--bg-dark);
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      top: -120px;
      right: -80px;
      width: 480px;
      height: 480px;
      background: radial-gradient(circle, rgba(39,224,200,0.25) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero::after {
      content: "";
      position: absolute;
      bottom: -120px;
      left: -80px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(124,92,255,0.2) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(39,224,200,0.12);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 24px;
      border: 1px solid rgba(39,224,200,0.3);
    }

    .hero h1 {
      font-family: var(--font-display);
      font-size: 44px;
      font-weight: 700;
      color: #fff;
      line-height: 1.2;
      margin-bottom: 20px;
    }

    .hero h1 .accent {
      color: var(--primary);
      text-shadow: 0 0 20px rgba(39,224,200,0.3);
    }

    .hero-sub {
      font-size: 17px;
      color: rgba(255,255,255,0.7);
      max-width: 640px;
      margin: 0 auto 32px;
      line-height: 1.8;
    }

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

    .hero-breadcrumb {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: rgba(255,255,255,0.4);
      margin-bottom: 20px;
    }

    .hero-breadcrumb a {
      color: rgba(255,255,255,0.6);
    }

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

    /* ===== 区块通用 ===== */
    .section {
      padding: 80px 0;
    }

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

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

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

    .section-head h2 {
      font-family: var(--font-display);
      font-size: 32px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-head p {
      color: var(--text-gray);
      font-size: 16px;
      max-width: 560px;
      margin: 0 auto;
      line-height: 1.7;
    }

    .section-dark .section-head h2 {
      color: #fff;
    }

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

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

    .feature-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      border: 1px solid transparent;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(39,224,200,0.3);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(39,224,200,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 20px;
      margin-bottom: 16px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 10px;
      line-height: 1.4;
    }

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

    /* ===== 内容预览卡片 ===== */
    .preview-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .preview-card {
      background: #fff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      border: 1px solid #f0f0f0;
    }

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

    .preview-media {
      height: 180px;
      background: var(--bg-dark);
      position: relative;
      overflow: hidden;
    }

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

    .preview-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      background: var(--accent-orange);
      color: #0B0F19;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 999px;
    }

    .preview-body {
      padding: 20px 20px 24px;
    }

    .preview-body h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 8px;
      line-height: 1.4;
      transition: color 0.2s;
    }

    .preview-card:hover .preview-body h3 {
      color: var(--primary);
    }

    .preview-body p {
      font-size: 14px;
      color: var(--text-gray);
      line-height: 1.6;
      margin-bottom: 12px;
    }

    .preview-meta {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: #9ca3af;
    }

    .preview-meta .tag {
      background: #F3F4F6;
      color: #374151;
      padding: 2px 10px;
      border-radius: 999px;
      font-size: 12px;
      transition: background 0.2s, color 0.2s;
    }

    .preview-meta .tag:hover {
      background: var(--primary);
      color: #0B0F19;
    }

    /* ===== 流程区 ===== */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }

    .process-step {
      text-align: center;
      padding: 36px 20px;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-lg);
      position: relative;
      transition: all 0.3s ease;
    }

    .process-step:hover {
      border-color: rgba(39,224,200,0.4);
      background: rgba(39,224,200,0.06);
      transform: translateY(-4px);
    }

    .process-step .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(39,224,200,0.15);
      border: 1px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-mono);
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin: 0 auto 16px;
    }

    .process-step h3 {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

    .process-step p {
      font-size: 14px;
      color: rgba(255,255,255,0.5);
      line-height: 1.6;
    }

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

    .stat-item {
      text-align: center;
      padding: 32px 20px;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-lg);
      transition: all 0.3s ease;
    }

    .stat-item:hover {
      border-color: rgba(39,224,200,0.4);
      background: rgba(39,224,200,0.05);
    }

    .stat-num {
      font-family: var(--font-mono);
      font-size: 42px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
      display: block;
      margin-bottom: 8px;
    }

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

    /* ===== FAQ ===== */
    .faq-wrap {
      max-width: 860px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 240px 1fr;
      gap: 40px;
    }

    .faq-title-block h2 {
      font-family: var(--font-display);
      font-size: 28px;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .faq-title-block p {
      font-size: 15px;
      color: var(--text-gray);
      line-height: 1.6;
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #fff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      border: 1px solid #f0f0f0;
      overflow: hidden;
      transition: box-shadow 0.2s ease;
    }

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

    .faq-item.open {
      border-color: rgba(39,224,200,0.4);
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-dark);
      text-align: left;
      transition: color 0.2s;
    }

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

    .faq-question .faq-icon {
      font-size: 14px;
      color: var(--text-gray);
      transition: transform 0.3s ease, color 0.2s;
    }

    .faq-item.open .faq-icon {
      transform: rotate(180deg);
      color: var(--primary);
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      font-size: 14px;
      color: var(--text-gray);
      line-height: 1.7;
      border-top: 1px solid transparent;
    }

    .faq-item.open .faq-answer {
      padding: 0 24px 18px;
      max-height: 300px;
      border-top-color: rgba(39,224,200,0.3);
    }

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

    .cta-section::before {
      content: "";
      position: absolute;
      top: -100px;
      left: 50%;
      transform: translateX(-50%);
      width: 600px;
      height: 300px;
      background: radial-gradient(ellipse, rgba(39,224,200,0.15) 0%, transparent 70%);
      pointer-events: none;
    }

    .cta-section h2 {
      font-family: var(--font-display);
      font-size: 34px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
      position: relative;
    }

    .cta-section p {
      font-size: 16px;
      color: rgba(255,255,255,0.6);
      max-width: 480px;
      margin: 0 auto 32px;
      position: relative;
    }

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

    /* ===== 页脚 ===== */
    .footer {
      background: var(--bg-dark);
      border-top: 1px solid rgba(255,255,255,0.08);
      padding: 56px 0 0;
    }

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

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
      font-family: var(--font-display);
    }

    .footer-brand p {
      font-size: 14px;
      color: rgba(255,255,255,0.5);
      line-height: 1.6;
      margin-bottom: 10px;
      max-width: 340px;
    }

    .domain-info {
      font-family: var(--font-mono);
      font-size: 13px;
      color: rgba(255,255,255,0.3);
    }

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

    .footer-nav a {
      display: block;
      font-size: 14px;
      color: rgba(255,255,255,0.5);
      padding: 6px 0;
      transition: color 0.2s, padding-left 0.2s;
    }

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

    .footer-contact p {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: rgba(255,255,255,0.5);
      padding: 6px 0;
    }

    .footer-contact i {
      color: var(--primary);
      width: 16px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding: 20px 0;
      text-align: center;
    }

    .footer-bottom p {
      font-size: 13px;
      color: rgba(255,255,255,0.3);
    }

    /* ===== 浮动 CTA ===== */
    .floating-cta {
      position: fixed;
      right: 24px;
      bottom: 24px;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: var(--primary);
      color: #0B0F19;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.5);
      z-index: 40;
      transition: all 0.3s ease;
    }

    .floating-cta:hover {
      transform: scale(1.1);
      box-shadow: 0 8px 32px rgba(39,224,200,0.4);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .sidebar {
        width: 72px;
      }

      .sidebar-brand {
        padding: 20px 12px;
        text-align: center;
      }

      .brand-logo {
        justify-content: center;
        font-size: 0;
      }

      .brand-logo .logo-icon {
        font-size: 20px;
      }

      .brand-domain {
        display: none;
      }

      .drawer-link {
        justify-content: center;
        padding: 14px 8px;
        font-size: 0;
      }

      .drawer-link i {
        font-size: 18px;
        width: auto;
      }

      .drawer-link.active::before {
        left: -8px;
      }

      .drawer-divider {
        margin: 12px 6px;
      }

      .sidebar-footer {
        padding: 12px 8px;
        text-align: center;
      }

      .sidebar-footer p {
        display: none;
      }

      .main-wrapper {
        margin-left: 72px;
      }

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

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

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

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

    @media (max-width: 768px) {
      .sidebar {
        display: none;
      }

      .main-wrapper {
        margin-left: 0;
      }

      .mobile-header {
        display: flex;
      }

      .drawer-panel {
        display: none;
      }

      .drawer-panel.open {
        display: block;
      }

      .hero {
        padding: 100px 20px 56px;
      }

      .hero h1 {
        font-size: 30px;
      }

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

      .section {
        padding: 56px 20px;
      }

      .section-head {
        margin-bottom: 36px;
      }

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

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

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

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

      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
      }

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

      .faq-wrap {
        grid-template-columns: 1fr;
        gap: 24px;
      }

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

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .floating-cta {
        width: 48px;
        height: 48px;
        right: 16px;
        bottom: 16px;
        font-size: 16px;
      }
    }

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

      .hero-actions .btn {
        width: 100%;
        max-width: 280px;
      }

      .cta-actions .btn {
        width: 100%;
        max-width: 280px;
      }

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

      .preview-media {
        height: 160px;
      }
    }

/* roulang page: article */
:root {
    --bg-dark: #0B0F19;
    --bg-light: #F7F8FA;
    --bg-white: #FFFFFF;
    --primary: #27E0C8;
    --primary-dark: #0B0F19;
    --accent: #F5A623;
    --neon-purple: #7C5CFF;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    --border-dark: rgba(255, 255, 255, 0.08);
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
    --font-num: "DIN Alternate", "Bahnschrift", "Roboto Mono", monospace;
    --font-body: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

  @layer base {
    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      margin: 0;
      font-family: var(--font-body);
      background: var(--bg-light);
      color: var(--text-main);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    button {
      font-family: inherit;
    }
    h1, h2, h3, h4, p {
      margin-top: 0;
    }
  }

  @layer components {
    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .layout {
      min-height: 100vh;
    }

    .main-wrap {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      margin-left: 264px;
    }

    .main-content {
      flex: 1;
    }

    /* ===== 侧边栏 ===== */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: 264px;
      height: 100vh;
      background: var(--bg-dark);
      border-right: 1px solid var(--border-dark);
      z-index: 100;
      display: flex;
      flex-direction: column;
    }
    .sidebar-brand {
      padding: 24px 20px 20px;
      border-bottom: 1px solid var(--border-dark);
    }
    .brand-link {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-size: 20px;
      font-weight: 700;
      line-height: 1.2;
    }
    .logo-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: rgba(39, 224, 200, 0.12);
      border: 1px solid rgba(39, 224, 200, 0.3);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }
    .logo-neon {
      color: var(--primary);
    }
    .domain-info {
      color: rgba(255, 255, 255, 0.35);
      font-size: 12px;
      margin: 8px 0 0;
      letter-spacing: 0.02em;
    }

    .drawer-nav {
      flex: 1;
      overflow-y: auto;
      padding: 14px 12px;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .drawer-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 14px;
      border-radius: 10px;
      color: rgba(255, 255, 255, 0.65);
      font-size: 14px;
      font-weight: 500;
      transition: all 0.2s ease;
      border-left: 3px solid transparent;
    }
    .drawer-link i {
      width: 18px;
      text-align: center;
      font-size: 15px;
    }
    .drawer-link:hover {
      background: rgba(255, 255, 255, 0.06);
      color: #fff;
    }
    .drawer-link.active {
      background: rgba(39, 224, 200, 0.1);
      color: var(--primary);
      border-left-color: var(--primary);
    }
    .drawer-divider {
      height: 1px;
      background: var(--border-dark);
      margin: 10px 0;
    }
    .sidebar-footer {
      padding: 16px 20px 20px;
      border-top: 1px solid var(--border-dark);
    }
    .sidebar-footer p {
      color: rgba(255, 255, 255, 0.35);
      font-size: 12px;
      margin: 0 0 10px;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      line-height: 1.4;
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.25s ease;
      text-align: center;
    }
    .btn:focus-visible,
    .float-cta:focus-visible,
    .hamburger:focus-visible {
      outline: 3px solid rgba(39, 224, 200, 0.4);
      outline-offset: 2px;
    }
    .btn-primary {
      background: var(--primary);
      color: var(--primary-dark);
      border-color: var(--primary);
    }
    .btn-primary:hover {
      background: #3BE8D2;
      border-color: #3BE8D2;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(39, 224, 200, 0.35);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(39, 224, 200, 0.1);
      transform: translateY(-1px);
    }
    .btn-accent {
      background: var(--accent);
      color: var(--primary-dark);
      border-color: var(--accent);
    }
    .btn-accent:hover {
      background: #FBBF24;
      border-color: #FBBF24;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(245, 166, 35, 0.3);
    }
    .btn-ghost {
      background: transparent;
      color: rgba(255, 255, 255, 0.85);
      border-color: rgba(255, 255, 255, 0.25);
    }
    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-sm {
      padding: 8px 16px;
      font-size: 13px;
    }
    .btn:active {
      transform: translateY(0px);
    }

    /* ===== 移动端顶部 ===== */
    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 95;
      height: 60px;
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
      background: var(--bg-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      color: #fff;
      font-size: 17px;
      font-weight: 700;
    }
    .mobile-brand .logo-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      font-size: 13px;
    }
    .hamburger {
      width: 40px;
      height: 40px;
      border-radius: 8px;
      background: rgba(255, 255, 255, 0.08);
      border: none;
      color: #fff;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s;
    }
    .hamburger:hover {
      background: rgba(255, 255, 255, 0.16);
    }

    /* ===== 抽屉 ===== */
    .drawer-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.55);
      z-index: 120;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }
    .drawer-overlay.open {
      opacity: 1;
      pointer-events: auto;
    }
    .mobile-drawer {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: 280px;
      background: var(--bg-dark);
      z-index: 130;
      transform: translateX(-100%);
      transition: transform 0.3s ease;
      padding-bottom: 20px;
      overflow-y: auto;
    }
    .mobile-drawer.open {
      transform: translateX(0);
    }
    body.lock {
      overflow: hidden;
    }

    /* ===== 文章 Hero ===== */
    .article-hero {
      background: var(--bg-dark);
      position: relative;
      padding: 72px 0 60px;
      overflow: hidden;
    }
    .article-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
    }
    .article-hero::after {
      content: '';
      position: absolute;
      right: -8%;
      top: -40%;
      width: 460px;
      height: 460px;
      background: radial-gradient(circle, rgba(39, 224, 200, 0.2), transparent 70%);
      pointer-events: none;
    }
    .article-hero .container {
      position: relative;
      z-index: 2;
    }
    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.55);
      margin-bottom: 24px;
    }
    .breadcrumb a {
      color: rgba(255, 255, 255, 0.55);
      transition: color 0.2s;
    }
    .breadcrumb a:hover {
      color: var(--primary);
    }
    .breadcrumb .sep {
      color: rgba(255, 255, 255, 0.25);
    }
    .breadcrumb .current {
      max-width: 300px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      color: rgba(255, 255, 255, 0.8);
    }
    .article-hero h1 {
      color: #fff;
      font-size: 42px;
      line-height: 1.2;
      font-weight: 700;
      margin: 0 0 22px;
      max-width: 880px;
      letter-spacing: 0.01em;
    }
    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      color: rgba(255, 255, 255, 0.5);
      font-size: 14px;
    }
    .article-meta .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .article-meta .meta-item i {
      color: var(--primary);
      font-size: 13px;
    }
    .article-meta .meta-cat {
      color: var(--primary);
    }

    /* ===== 文章主体 ===== */
    .article-main {
      background: var(--bg-light);
      padding: 56px 0 80px;
    }
    .article-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      padding: 48px 48px 40px;
      max-width: 860px;
      margin: 0 auto;
    }
    .article-body {
      max-width: 760px;
      margin: 0 auto;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-main);
    }
    .article-body p {
      margin: 0 0 1.5em;
    }
    .article-body h2 {
      font-size: 26px;
      font-weight: 700;
      margin: 2em 0 0.8em;
      padding-bottom: 0.45em;
      border-bottom: 1px solid var(--border);
    }
    .article-body h3 {
      font-size: 20px;
      font-weight: 600;
      margin: 1.8em 0 0.6em;
    }
    .article-body img {
      border-radius: 14px;
      margin: 1.5em 0;
    }
    .article-body a {
      color: var(--primary);
      text-decoration: underline;
      text-underline-offset: 3px;
    }
    .article-body a:hover {
      color: #0FAF9B;
    }
    .article-body blockquote {
      border-left: 4px solid var(--primary);
      background: #F0FDFB;
      padding: 16px 20px;
      border-radius: 0 12px 12px 0;
      margin: 1.5em 0;
      color: #374151;
    }
    .article-body ul,
    .article-body ol {
      margin: 0 0 1.5em;
      padding-left: 1.5em;
    }
    .article-body li {
      margin-bottom: 0.4em;
    }
    .article-body code {
      background: #F3F4F6;
      border-radius: 6px;
      padding: 2px 8px;
      font-size: 0.9em;
      font-family: var(--font-num);
    }
    .article-body pre {
      background: var(--bg-dark);
      color: #E5E7EB;
      padding: 20px;
      border-radius: 14px;
      overflow-x: auto;
      margin: 1.5em 0;
    }
    .article-body pre code {
      background: transparent;
      color: inherit;
      padding: 0;
    }
    .article-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 1.5em 0;
    }
    .article-body th,
    .article-body td {
      border: 1px solid var(--border);
      padding: 10px 14px;
      text-align: left;
    }
    .article-body th {
      background: #F9FAFB;
      font-weight: 600;
    }
    .article-body hr {
      border: none;
      border-top: 1px solid var(--border);
      margin: 2em 0;
    }

    /* ===== 空态 ===== */
    .article-not-found {
      max-width: 560px;
      margin: 0 auto;
      text-align: center;
      padding: 40px 20px 20px;
    }
    .article-not-found i {
      font-size: 52px;
      color: #D1D5DB;
      margin-bottom: 16px;
    }
    .article-not-found h2 {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-main);
      margin: 0 0 8px;
    }
    .article-not-found p {
      color: var(--text-muted);
      margin: 0 0 24px;
    }

    /* ===== 标签 ===== */
    .article-tags {
      max-width: 760px;
      margin: 32px auto 0;
      padding-top: 24px;
      border-top: 1px solid var(--border);
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #F3F4F6;
      color: #374151;
      font-size: 13px;
      padding: 6px 14px;
      border-radius: 999px;
      transition: all 0.2s ease;
    }
    .tag:hover {
      background: var(--primary);
      color: var(--primary-dark);
    }

    /* ===== 相关推荐 ===== */
    .related-section {
      max-width: 1240px;
      margin: 64px auto 0;
    }
    .related-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }
    .related-head h2 {
      font-size: 28px;
      font-weight: 700;
      margin: 0;
    }
    .related-back {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--text-muted);
      font-size: 14px;
      font-weight: 600;
      transition: color 0.2s;
    }
    .related-back:hover {
      color: var(--primary);
    }
    .recommend-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .recommend-card {
      display: flex;
      flex-direction: column;
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border);
      transition: all 0.25s ease;
      color: var(--text-main);
    }
    .recommend-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(39, 224, 200, 0.5);
    }
    .recommend-card .thumb {
      height: 160px;
      overflow: hidden;
      background: #E5E7EB;
    }
    .recommend-card .thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .recommend-card:hover .thumb img {
      transform: scale(1.04);
    }
    .recommend-info {
      padding: 20px 20px 18px;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .recommend-info h3 {
      font-size: 17px;
      font-weight: 600;
      line-height: 1.5;
      margin: 0;
    }
    .recommend-info span {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
    }

    /* ===== 文章 CTA ===== */
    .article-cta {
      margin-top: 40px;
    }
    .cta-box {
      background: var(--bg-dark);
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 48px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-box::before {
      content: '';
      position: absolute;
      left: 50%;
      top: -80px;
      transform: translateX(-50%);
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(39, 224, 200, 0.18), transparent 70%);
      pointer-events: none;
    }
    .cta-box h3 {
      color: #fff;
      font-size: 26px;
      font-weight: 700;
      margin: 0 0 10px;
      position: relative;
    }
    .cta-box p {
      color: rgba(255, 255, 255, 0.6);
      font-size: 15px;
      margin: 0 0 28px;
      position: relative;
    }
    .cta-box .btn-group {
      display: flex;
      gap: 14px;
      justify-content: center;
      flex-wrap: wrap;
      position: relative;
    }

    /* ===== 页脚 ===== */
    .footer {
      background: var(--bg-dark);
      border-top: 1px solid var(--border-dark);
      padding: 64px 0 0;
      margin-top: 80px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 48px;
    }
    .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .footer-brand p {
      color: rgba(255, 255, 255, 0.5);
      font-size: 14px;
      line-height: 1.7;
      margin: 0 0 8px;
    }
    .domain-info {
      color: rgba(255, 255, 255, 0.3);
      font-size: 13px;
    }
    .footer-nav,
    .footer-contact {
      display: flex;
      flex-direction: column;
    }
    .footer-nav h4,
    .footer-contact h4 {
      color: #fff;
      font-size: 16px;
      font-weight: 600;
      margin: 0 0 16px;
    }
    .footer-nav a {
      color: rgba(255, 255, 255, 0.5);
      font-size: 14px;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .footer-nav a:hover {
      color: var(--primary);
    }
    .footer-contact p {
      color: rgba(255, 255, 255, 0.5);
      font-size: 14px;
      margin: 0 0 8px;
    }
    .footer-contact i {
      color: var(--primary);
      margin-right: 8px;
      width: 16px;
      text-align: center;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding: 20px 0;
      text-align: center;
      color: rgba(255, 255, 255, 0.35);
      font-size: 13px;
    }

    /* ===== 浮动 CTA ===== */
    .float-cta {
      position: fixed;
      right: 24px;
      bottom: 24px;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
      z-index: 110;
      transition: all 0.25s ease;
      opacity: 0;
      transform: translateY(16px);
      pointer-events: none;
    }
    .float-cta.show {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }
    .float-cta:hover {
      background: #3BE8D2;
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.55);
    }
  }

  /* ===== 响应式 ===== */
  @media (max-width: 1023px) {
    .sidebar {
      display: none;
    }
    .main-wrap {
      margin-left: 0;
    }
    .mobile-header {
      display: flex;
    }
    .article-hero {
      padding: 48px 0 40px;
    }
    .article-hero h1 {
      font-size: 32px;
    }
    .recommend-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
  }

  @media (max-width: 767px) {
    .container {
      padding: 0 16px;
    }
    .article-hero {
      padding: 36px 0 28px;
    }
    .article-hero h1 {
      font-size: 28px;
      line-height: 1.25;
    }
    .article-main {
      padding: 32px 0 56px;
    }
    .article-card {
      padding: 24px 16px;
      border-radius: 14px;
    }
    .article-body h2 {
      font-size: 22px;
    }
    .article-tags {
      padding-top: 18px;
      margin-top: 24px;
    }
    .related-section {
      margin-top: 40px;
    }
    .related-head h2 {
      font-size: 24px;
    }
    .recommend-grid {
      grid-template-columns: 1fr;
      gap: 16px;
    }
    .cta-box {
      padding: 32px 20px;
    }
    .cta-box h3 {
      font-size: 22px;
    }
    .article-meta {
      gap: 10px;
      font-size: 13px;
      flex-direction: column;
      align-items: flex-start;
    }
    .footer {
      margin-top: 56px;
      padding-top: 40px;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
      padding-bottom: 32px;
    }
    .float-cta {
      width: 48px;
      height: 48px;
      right: 16px;
      bottom: 16px;
      font-size: 16px;
    }
  }

  @media (max-width: 520px) {
    .breadcrumb {
      font-size: 12px;
    }
    .breadcrumb .current {
      max-width: 180px;
    }
    .article-body {
      font-size: 15px;
    }
  }