/* roulang page: index */
:root {
  --bg-primary: #050B18;
  --bg-panel: #0B1526;
  --bg-surface: #101D30;
  --glass-bg: rgba(255,255,255,0.04);
  --glass-bg-hover: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.10);
  --glass-border-hover: rgba(255,255,255,0.16);
  --accent: #2DD4BF;
  --accent-hover: #5EEAD4;
  --accent-deep: #14B8A6;
  --accent-dark: #0891B2;
  --amber: #F59E0B;
  --text-primary: #E5EAF2;
  --text-secondary: #94A3B8;
  --text-weak: #64748B;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.35), 0 0 24px rgba(45,212,191,0.08);
  --shadow-btn: 0 8px 24px rgba(45,212,191,0.25);
  --font-cn: "PingFang SC","Microsoft YaHei","HarmonyOS Sans SC","Noto Sans CJK SC",sans-serif;
  --font-mono: "JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --sidebar-w: 264px;
  --spacing: 88px;
  --spacing-mobile: 56px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  background-color: var(--bg-primary);
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 120px;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: color .25s; }
a:hover { color: var(--accent-hover); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
.grid-container { max-width: 1200px; }
section { position: relative; }
h1, h2, h3, h4 { font-weight: 600; line-height: 1.3; text-wrap: balance; }
h2 { font-size: clamp(24px, 2.6vw, 32px); margin-top: 56px; margin-bottom: 28px; }
p { text-align: justify; margin-bottom: 20px; color: var(--text-secondary); }
.text-center { text-align: center; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

/* Sidebar */
.sidebar {
  position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-w);
  background: var(--bg-panel); border-right: 1px solid rgba(255,255,255,0.08);
  z-index: 300; display: flex; flex-direction: column; padding: 28px 0 20px;
}
.sidebar-logo { padding: 0 28px; margin-bottom: 38px; }
.sidebar-logo a { display: flex; align-items: center; gap: 10px; }
.sidebar-logo .logo-mark {
  width: 38px; height: 38px; border-radius: 10px; flex: 0 0 38px;
  background: linear-gradient(135deg, var(--accent-deep), var(--accent-dark));
  display: flex; align-items: center; justify-content: center; font-size: 17px; color: #fff;
  box-shadow: 0 4px 18px rgba(45,212,191,0.35);
}
.sidebar-logo .logo-text { font-size: 16px; font-weight: 600; color: var(--text-primary); line-height: 1.3; }
.sidebar-logo .logo-text small { display: block; font-size: 12px; color: var(--accent); font-weight: 400; letter-spacing: 2px; }
.sidebar-nav { flex: 1; padding: 0 12px; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px; padding: 12px 16px; margin-bottom: 4px;
  border-radius: var(--radius-md); color: var(--text-secondary); font-size: 15px;
  border-left: 2px solid transparent; transition: all .25s;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 15px; }
.sidebar-nav a:hover { background: rgba(45,212,191,0.08); color: #fff; }
.sidebar-nav a.active {
  background: rgba(255,255,255,0.06); border-left-color: var(--accent); color: #fff; font-weight: 500;
}
.sidebar-status { padding: 14px 28px; display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-weak); border-top: 1px solid rgba(255,255,255,0.06); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px rgba(45,212,191,0.7); }
.status-dot.warn { background: var(--amber); box-shadow: 0 0 8px rgba(245,158,11,0.7); }

/* Main layout */
.main-content { margin-left: var(--sidebar-w); padding: 0; }
.page-wrap { max-width: 1200px; margin: 0 auto; padding: 0 40px; }

/* Mobile topbar */
.mobile-topbar {
  display: none; position: fixed; top: 0; left: 0; right: 0; height: 56px;
  background: rgba(5,11,24,0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  z-index: 400; align-items: center; padding: 0 16px; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.mobile-topbar .offcanvas-toggle { background: none; border: none; color: var(--text-primary); font-size: 20px; width: 44px; height: 44px; cursor: pointer; }
.mobile-topbar .mobile-logo { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-left: 8px; flex: 1; }
.mobile-topbar .mobile-logo small { color: var(--accent); font-size: 11px; }
.mobile-topbar .mobile-cta {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent-dark)); color: #fff;
  border-radius: 8px; padding: 8px 16px; font-size: 13px; font-weight: 500; box-shadow: var(--shadow-btn);
}
.off-canvas { background: var(--bg-panel); }
.off-canvas .mobile-nav-wrap { padding: 24px 16px; }
.off-canvas .mobile-nav-wrap a {
  display: block; padding: 14px 16px; margin-bottom: 8px; border-radius: var(--radius-md);
  color: var(--text-secondary); font-size: 15px;
}
.off-canvas .mobile-nav-wrap a.active { background: rgba(45,212,191,0.08); color: #fff; border-left: 2px solid var(--accent); }
.off-canvas .sidebar-status { display: flex; padding: 16px; }

/* Buttons */
.btn-primary, .btn-ghost, .btn-back {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px; font-size: 15px; font-weight: 600;
  transition: all .3s; cursor: pointer; border: none; line-height: 1.4;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent-dark));
  color: #fff; box-shadow: var(--shadow-btn);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(45,212,191,0.4); }
.btn-ghost {
  background: transparent; color: var(--text-primary); border: 1px solid rgba(255,255,255,0.25);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-back { background: transparent; color: var(--accent); border: 1px solid rgba(45,212,191,0.4); }
.btn-back:hover { background: rgba(45,212,191,0.08); color: var(--accent-hover); }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }

/* Hero */
.hero {
  min-height: 70vh; padding: 80px 0 60px; position: relative;
  background-image: linear-gradient(to right, rgba(5,11,24,0.92), rgba(5,11,24,0.72)), url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center;
  display: flex; align-items: center;
}
.hero .hero-inner { padding: 0 40px; max-width: 1200px; width: 100%; margin: 0 auto; }
.hero .hero-glass { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.10); border-radius: var(--radius-lg); padding: 40px; max-width: 720px; backdrop-filter: blur(8px); }
.hero h1 { font-size: clamp(32px, 4vw, 46px); font-weight: 700; margin-bottom: 18px; color: #fff; }
.hero .hero-sub { font-size: 17px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 30px; text-align: left; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-badges { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-badges .badge {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.10);
  border-radius: 999px; padding: 8px 18px; font-size: 13px; color: var(--text-secondary);
}
.hero-badges .badge i { color: var(--accent); margin-right: 6px; }
.hero-scroll { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); width: 2px; height: 48px; background: linear-gradient(to bottom, transparent, var(--accent)); border-radius: 2px; }

/* Trust bar */
.trust-bar { padding: 32px 0; border-bottom: 1px solid rgba(255,255,255,0.06); background: rgba(11,21,38,0.5); }
.trust-bar .trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.trust-bar .trust-item { text-align: center; padding: 12px; }
.trust-bar .trust-num { font-family: var(--font-mono); font-size: 30px; font-weight: 700; color: var(--accent); display: block; line-height: 1.2; }
.trust-bar .trust-unit { font-size: 13px; color: var(--text-weak); }
.trust-bar .trust-label { font-size: 14px; color: var(--text-secondary); display: block; margin-top: 6px; }

/* Feature section */
.section { padding: var(--spacing) 0; }
.section-title { font-size: clamp(24px, 2.6vw, 32px); font-weight: 600; margin-bottom: 12px; color: var(--text-primary); }
.section-subtitle { color: var(--text-secondary); font-size: 16px; max-width: 640px; margin-bottom: 36px; }
.section-label { display: inline-block; font-size: 13px; color: var(--accent); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 8px; }
.feature-card, .feature-card--primary, .feature-sub-card, .glass-card {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 24px; transition: all .3s;
}
.feature-card:hover, .feature-sub-card:hover { background: var(--glass-bg-hover); border-color: var(--glass-border-hover); transform: translateY(-4px); box-shadow: var(--shadow-card); }
.feature-card--primary {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.10); border-radius: var(--radius-lg);
  overflow: hidden; padding: 0; height: 100%; box-shadow: var(--shadow-card);
}
.feature-card--primary .feature-img { width: 100%; height: 200px; object-fit: cover; }
.feature-card--primary .feature-body { padding: 24px; }
.feature-card--primary h3 { font-size: 19px; margin-bottom: 12px; color: var(--text-primary); }
.feature-card--primary p { font-size: 14px; line-height: 1.7; color: var(--text-secondary); margin-bottom: 18px; }
.feature-link { color: var(--accent); font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; transition: gap .3s; }
.feature-link:hover { gap: 10px; }
.feature-sub-card { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 16px; padding: 20px 22px; }
.feature-sub-card .sub-icon { flex: 0 0 44px; width: 44px; height: 44px; border-radius: 12px; background: rgba(45,212,191,0.12); display: flex; align-items: center; justify-content: center; font-size: 18px; color: var(--accent); }
.feature-sub-card h4 { font-size: 17px; margin-bottom: 6px; color: var(--text-primary); }
.feature-sub-card p { font-size: 14px; line-height: 1.65; color: var(--text-secondary); margin-bottom: 0; text-align: left; }

/* Steps */
.steps-section { padding: var(--spacing) 0; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 60px; position: relative; }
.step-item { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 28px 20px; text-align: center; position: relative; transition: border-color .3s; }
.step-item:hover { border-color: var(--accent); }
.step-num { font-family: var(--font-mono); font-size: 22px; font-weight: 700; color: var(--accent); display: block; margin-bottom: 8px; }
.step-item h4 { font-size: 16px; color: var(--text-primary); margin-bottom: 8px; }
.step-item p { font-size: 13px; color: var(--text-secondary); margin-bottom: 0; text-align: center; }
.step-line { position: absolute; top: 45%; right: -10px; width: 20px; height: 2px; background: rgba(255,255,255,0.2); transition: background .3s; }
.step-item:hover ~ .step-item .step-line { background: var(--accent); }
.scene-split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.scene-split .scene-img-wrap { position: relative; }
.scene-split .scene-img { border-radius: var(--radius-lg); width: 100%; height: 300px; object-fit: cover; }
.watermark { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) rotate(-45deg); font-size: 32px; color: rgba(255,255,255,0.08); font-weight: 700; white-space: nowrap; pointer-events: none; font-family: var(--font-cn); }
.scene-split .scene-content h3 { font-size: 20px; margin-bottom: 14px; color: var(--text-primary); }
.scene-split .scene-content p { font-size: 15px; line-height: 1.75; color: var(--text-secondary); margin-bottom: 14px; }
.scene-hint { font-size: 13px; color: var(--text-weak); }

/* Testimonials */
.testimonials-section { padding: var(--spacing) 0; background: rgba(11,21,38,0.4); }
.testi-data { display: flex; gap: 40px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.testi-data .data-item { text-align: center; }
.testi-data .data-num { font-family: var(--font-mono); font-size: 36px; font-weight: 700; color: var(--accent); display: block; }
.testi-data .data-label { font-size: 14px; color: var(--text-weak); margin-top: 4px; }
.testi-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.testi-card { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 24px; }
.testi-card .testi-stars { color: var(--amber); font-size: 14px; margin-bottom: 10px; }
.testi-card blockquote { font-size: 14px; line-height: 1.75; color: var(--text-secondary); margin-bottom: 16px; border: none; }
.testi-card .testi-author { font-size: 14px; color: var(--text-primary); font-weight: 500; }
.testi-card .testi-role { font-size: 12px; color: var(--text-weak); }
.testi-quote { background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.12); border-radius: var(--radius-lg); padding: 40px; grid-row: span 2; }
.testi-quote i { font-size: 28px; color: var(--accent); opacity: .6; margin-bottom: 14px; }
.testi-quote blockquote { font-size: 18px; line-height: 1.8; color: var(--text-primary); }

/* News */
.news-section { padding: var(--spacing) 0; }
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.news-card { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 22px 24px; transition: all .3s; }
.news-card:hover { background: var(--glass-bg-hover); border-color: var(--glass-border-hover); transform: translateY(-3px); box-shadow: var(--shadow-card); }
.news-card .news-cat { display: inline-block; background: transparent; border: 1px solid var(--accent); color: var(--accent); border-radius: 999px; padding: 3px 12px; font-size: 12px; margin-bottom: 12px; transition: all .25s; }
.news-card .news-cat:hover { background: var(--accent); color: var(--bg-primary); }
.news-card h3 { font-size: 17px; margin-bottom: 10px; }
.news-card h3 a { color: var(--text-primary); }
.news-card h3 a:hover { color: var(--accent); }
.news-card .news-summary { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; gap: 12px; align-items: center; }
.news-meta time { font-family: var(--font-mono); font-size: 13px; color: var(--amber); }
.news-meta .news-link { margin-left: auto; font-size: 13px; color: var(--accent); display: inline-flex; align-items: center; gap: 4px; }
.empty-state { text-align: center; padding: 60px 20px; background: var(--glass-bg); border: 1px dashed var(--glass-border); border-radius: var(--radius-md); color: var(--text-secondary); }
.empty-state i { font-size: 30px; color: var(--text-weak); display: block; margin-bottom: 12px; }

/* FAQ */
.faq-section { padding: var(--spacing) 0; background: rgba(11,21,38,0.4); }
.accordion-item {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md);
  margin-bottom: 12px; overflow: hidden; transition: border-color .3s;
}
.accordion-item.is-active { border-color: var(--accent); }
.accordion-item .accordion-title { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; cursor: pointer; font-size: 16px; color: var(--text-primary); font-weight: 500; margin: 0; }
.accordion-item .accordion-title .fa { font-size: 14px; transition: transform .3s; color: var(--accent); }
.accordion-item.is-active .accordion-title .fa { transform: rotate(45deg); }
.accordion-item .accordion-content { padding: 0 22px 18px; font-size: 14px; color: var(--text-secondary); line-height: 1.75; }

/* CTA */
.cta-section { padding: var(--spacing) 0; text-align: center; }
.cta-section .cta-inner { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.10); border-radius: var(--radius-lg); padding: 60px 40px; max-width: 800px; margin: 0 auto; }
.cta-section h2 { margin-top: 0; margin-bottom: 16px; }
.cta-section p { font-size: 15px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 28px; }
.cta-section .cta-btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Footer */
.footer { padding: 48px 0 20px; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
.footer-brand h4 { font-size: 18px; color: var(--text-primary); margin-bottom: 12px; }
.footer-brand p { font-size: 14px; color: var(--text-weak); }
.footer-col h5 { font-size: 15px; color: var(--text-primary); margin-bottom: 14px; }
.footer-col a { display: block; padding: 5px 0; font-size: 14px; color: var(--text-secondary); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 16px; text-align: center; font-size: 13px; color: var(--text-weak); }

/* Convert bar */
.convert-bar {
  position: fixed; bottom: 0; left: var(--sidebar-w); right: 0; height: 72px;
  background: rgba(5,11,24,0.85); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255,255,255,0.08); z-index: 500;
  display: flex; align-items: center; justify-content: center; gap: 20px; padding: 0 24px;
}
.convert-bar .convert-text { font-size: 14px; color: var(--text-primary); white-space: nowrap; }
.convert-bar form { display: flex; gap: 8px; max-width: 400px; flex: 1; }
.convert-bar input {
  flex: 1; background: transparent; border: none; border-bottom: 1px solid rgba(255,255,255,0.2);
  padding: 10px 12px; color: var(--text-primary); font-size: 14px; transition: border-color .3s, box-shadow .3s;
}
.convert-bar input:focus { border-bottom-color: var(--accent); box-shadow: 0 4px 12px rgba(45,212,191,0.15); outline: none; }
.convert-bar input::placeholder { color: var(--text-weak); }
.convert-bar .btn-primary { padding: 10px 20px; font-size: 14px; }
.convert-close { background: none; border: none; color: var(--text-weak); font-size: 20px; cursor: pointer; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 50%; transition: color .3s; }
.convert-close:hover { color: #fff; }

/* Responsive */
@media (max-width: 63.9375em) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; }
  .mobile-topbar { display: flex; }
  .convert-bar { left: 0; }
  .page-wrap { padding: 0 20px; }
  .hero .hero-inner { padding: 0 20px; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .scene-split { grid-template-columns: 1fr; }
  .testi-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 520px) {
  :root { --spacing: var(--spacing-mobile); }
  .hero { padding: 60px 0 50px; }
  .hero .hero-glass { padding: 24px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary, .hero-actions .btn-ghost { width: 100%; }
  .trust-bar .trust-grid { grid-template-columns: 1fr; gap: 16px; }
  .steps-grid { grid-template-columns: 1fr; }
  .convert-bar { height: auto; padding: 8px 12px; flex-wrap: wrap; gap: 8px; }
  .convert-bar .convert-text { display: none; }
  .convert-bar form { width: 100%; max-width: none; }
  .feature-sub-card { flex-direction: column; gap: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* roulang page: article */
:root {
  --bg-primary: #050B18;
  --bg-panel: #0B1526;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.08);
  --border-card: rgba(255,255,255,0.10);
  --border-card-hover: rgba(255,255,255,0.16);
  --primary: #2DD4BF;
  --primary-light: #5EEAD4;
  --primary-dark: #14B8A6;
  --accent: #F59E0B;
  --text-primary: #E5EAF2;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.35), 0 0 24px rgba(45,212,191,0.08);
  --shadow-card-hover: 0 16px 40px rgba(0,0,0,0.40), 0 0 32px rgba(45,212,191,0.12);
  --gap-section: 88px;
  --gap-mobile: 56px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background-color: var(--bg-primary);
  background-image:
    linear-gradient(rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--text-primary);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  padding-bottom: 96px;
}
a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary-light); }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
button, input { font-family: inherit; font-size: inherit; }
i { pointer-events: none; }

.app-shell { min-height: 100vh; }
.main-content { margin-left: 264px; padding-bottom: 40px; }
.container { max-width: 1200px; padding: 0 40px; margin: 0 auto; }

/* ===== 侧边导航 ===== */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: 264px;
  background: var(--bg-panel);
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex; flex-direction: column;
  z-index: 50;
  transition: transform 0.3s ease;
}
.sidebar-logo {
  padding: 32px 28px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; gap: 12px;
}
.logo-mark {
  width: 36px; height: 36px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 15px;
  box-shadow: 0 4px 16px rgba(45,212,191,0.3);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text .logo-main { font-size: 15px; font-weight: 700; color: var(--text-primary); letter-spacing: 0.02em; }
.logo-text .logo-sub { font-family: var(--font-mono); font-size: 10px; color: var(--primary); text-transform: uppercase; letter-spacing: 0.12em; }
.sidebar-nav { flex: 1; padding: 24px 16px; display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  transition: all 0.2s ease; position: relative;
  min-height: 44px;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 15px; }
.sidebar-nav a:hover { background: rgba(45,212,191,0.08); color: #fff; }
.sidebar-nav a.active {
  background: rgba(255,255,255,0.06);
  color: #fff; font-weight: 600;
  border-left: 2px solid var(--primary);
  box-shadow: inset 0 0 0 1px rgba(45,212,191,0.12);
}
.sidebar-status {
  padding: 20px 28px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; gap: 10px;
  font-size: 12px; color: var(--text-muted);
}
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 8px var(--primary); }
.status-text { font-family: var(--font-mono); letter-spacing: 0.04em; }

/* ===== 移动端顶栏 ===== */
.mobile-topbar {
  display: none;
  position: fixed; top: 0; left: 0; right: 0; height: 56px;
  background: rgba(5,11,24,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-card);
  z-index: 60;
  padding: 0 16px;
  align-items: center; justify-content: space-between;
}
.menu-toggle {
  width: 44px; height: 44px;
  background: transparent; border: none; border-radius: var(--radius-sm);
  color: var(--text-primary); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.menu-toggle:hover { background: rgba(255,255,255,0.08); }
.menu-toggle:focus-visible { outline: 2px solid var(--primary); }
.mobile-logo { display: flex; align-items: center; gap: 8px; color: var(--text-primary); font-weight: 700; font-size: 14px; }
.mobile-logo i { color: var(--primary); }
.mobile-cta { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; }
.drawer-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  z-index: 55; opacity: 0; transition: opacity 0.3s ease;
}
.drawer-overlay.active { display: block; opacity: 1; }

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: linear-gradient(135deg, #14B8A6, #0891B2);
  color: #fff !important; font-size: 15px; font-weight: 600;
  padding: 12px 22px; border-radius: 10px; border: none; cursor: pointer;
  box-shadow: 0 8px 24px rgba(45,212,191,0.25);
  transition: all 0.25s ease; text-decoration: none; min-height: 44px;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(45,212,191,0.40); color: #fff !important; }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 16px rgba(45,212,191,0.25); }
.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: rgba(255,255,255,0.04); color: var(--text-primary) !important;
  font-size: 14px; font-weight: 500;
  padding: 11px 20px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.25);
  cursor: pointer; transition: all 0.25s ease; min-height: 44px; text-decoration: none;
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary-light) !important; background: rgba(45,212,191,0.06); }
.btn-ghost:active { transform: translateY(0); }

/* ===== 面包屑 ===== */
.breadcrumb { padding: 32px 0 12px; font-size: 13px; color: var(--text-muted); }
.breadcrumb a { color: var(--text-secondary); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .divider { margin: 0 8px; color: var(--text-muted); opacity: 0.6; }
.breadcrumb .current { color: var(--text-secondary); }

/* ===== 文章头部 ===== */
.article-header { padding: 24px 0 8px; }
.article-title {
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 700; line-height: 1.35; color: var(--text-primary);
  letter-spacing: -0.01em; text-wrap: balance;
  margin-bottom: 16px;
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 20px; align-items: center;
  color: var(--text-muted); font-size: 13px;
  padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-item i { color: var(--primary); font-size: 13px; }
.meta-item .date { font-family: var(--font-mono); color: var(--accent); }
.meta-item .category { color: var(--text-secondary); }
.meta-item .views { font-family: var(--font-mono); }

/* ===== 文章正文 ===== */
.article-content {
  max-width: 780px; margin: 0 auto; padding: 32px 0 20px;
  font-size: 16px; line-height: 1.8; color: var(--text-primary);
}
.article-content p { margin-bottom: 20px; text-align: justify; }
.article-content h2 { font-size: 24px; font-weight: 600; margin: 44px 0 16px; color: var(--text-primary); line-height: 1.4; }
.article-content h3 { font-size: 19px; font-weight: 600; margin: 32px 0 14px; color: var(--text-primary); }
.article-content a { color: var(--primary); border-bottom: 1px solid rgba(45,212,191,0.3); }
.article-content a:hover { color: var(--primary-light); border-bottom-color: var(--primary-light); }
.article-content ul, .article-content ol { margin: 16px 0 20px; padding-left: 24px; }
.article-content li { margin-bottom: 8px; }
.article-content blockquote {
  border-left: 3px solid var(--primary);
  background: var(--bg-panel);
  padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0; color: var(--text-secondary); font-size: 15px;
}
.article-content img { border-radius: 8px; margin: 20px 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 20px 0; background: var(--bg-panel); border-radius: var(--radius-sm); overflow: hidden; }
.article-content table th {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary); font-weight: 600; text-align: left;
  padding: 12px 16px; font-size: 14px;
  border-bottom: 1px solid var(--border-card);
}
.article-content table td { padding: 12px 16px; font-size: 14px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.article-content table tr:nth-child(even) td { background: rgba(255,255,255,0.03); }
.article-content table tr:hover td { background: rgba(45,212,191,0.04); }
.article-content code {
  background: rgba(255,255,255,0.08); padding: 2px 8px; border-radius: 4px;
  font-family: var(--font-mono); font-size: 14px; color: var(--primary-light);
}
.article-content pre { background: var(--bg-panel); border-radius: var(--radius-sm); padding: 20px; overflow-x: auto; margin: 20px 0; }
.article-content pre code { background: none; padding: 0; font-size: 14px; }

/* ===== 标签 ===== */
.article-tags { max-width: 780px; margin: 10px auto 0; display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 0; }
.tag-badge {
  display: inline-block; padding: 5px 14px; border-radius: 999px;
  background: rgba(45,212,191,0.08); border: 1px solid rgba(45,212,191,0.3);
  color: var(--primary); font-size: 12px; font-weight: 500;
  transition: all 0.2s ease; cursor: default;
}
.tag-badge:hover { background: var(--primary); color: #050B18; border-color: var(--primary); }

/* ===== 相关推荐 ===== */
.related-section { margin-top: 60px; }
.related-title { font-size: 22px; font-weight: 600; color: var(--text-primary); margin-bottom: 24px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.related-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-md); overflow: hidden;
  transition: all 0.25s ease;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); border-color: var(--border-card-hover); }
.related-card .card-img { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
.related-card .card-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(5,11,24,0.55), transparent 60%);
}
.related-card .card-body { padding: 16px 18px 20px; }
.related-card .card-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.related-card .card-meta .cat { color: var(--primary); font-size: 11px; }
.related-card .card-meta .time { font-family: var(--font-mono); color: var(--accent); }
.related-card h3 { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; text-wrap: balance; }
.related-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }
.related-card .card-link { display: inline-block; margin-top: 12px; font-size: 13px; color: var(--primary); font-weight: 500; }
.related-card .card-link i { transition: transform 0.2s; }
.related-card .card-link:hover i { transform: translateX(4px); }

/* ===== 空态 ===== */
.empty-card {
  max-width: 480px; margin: 0 auto; padding: 48px 32px;
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); text-align: center;
  color: var(--text-secondary);
}
.empty-card i { font-size: 32px; color: var(--text-muted); margin-bottom: 12px; display: block; }
.empty-card p { font-size: 14px; margin-bottom: 16px; }
.empty-card .btn { margin-top: 8px; }

/* ===== 返回分类 ===== */
.back-bar { max-width: 780px; margin: 40px auto 0; text-align: center; }

/* ===== 固定转化条 ===== */
.sticky-cta {
  position: fixed; bottom: 0; left: 264px; right: 0; z-index: 40;
  background: rgba(5,11,24,0.85); border-top: 1px solid var(--border-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 12px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  min-height: 64px;
}
.cta-text { font-size: 14px; color: var(--text-secondary); white-space: nowrap; }
.cta-text strong { color: var(--primary); font-weight: 600; }
.cta-form { display: flex; align-items: center; gap: 8px; max-width: 400px; flex: 1; }
.cta-form input {
  flex: 1; background: rgba(255,255,255,0.06); border: none;
  border-bottom: 1px solid rgba(255,255,255,0.3);
  color: var(--text-primary); padding: 9px 12px; font-size: 13px;
  border-radius: 4px; transition: all 0.2s; min-width: 0;
}
.cta-form input:focus { outline: none; border-bottom-color: var(--primary); box-shadow: 0 2px 12px rgba(45,212,191,0.15); }
.cta-form input::placeholder { color: var(--text-muted); }
.cta-form .btn-primary { padding: 9px 18px; font-size: 13px; min-height: 38px; flex-shrink: 0; }
.cta-close {
  width: 36px; height: 36px; flex-shrink: 0;
  background: transparent; border: none; color: var(--text-muted);
  font-size: 16px; cursor: pointer; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.cta-close:hover { color: var(--text-primary); background: rgba(255,255,255,0.08); }
.cta-close:focus-visible { outline: 2px solid var(--primary); }

/* ===== 页脚 ===== */
.footer {
  background: #0A1424;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-left: 264px; margin-top: 60px;
}
.footer .container { padding: 48px 40px 20px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 0.8fr; gap: 40px; margin-bottom: 28px; }
.footer-brand h4 { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-brand h4 i { color: var(--primary); }
.footer-brand p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; max-width: 340px; }
.footer-col h5 { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 16px; }
.footer-col a { display: block; padding: 5px 0; font-size: 13px; color: var(--text-secondary); transition: color 0.2s, padding-left 0.2s; }
.footer-col a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px; font-size: 12px; color: var(--text-muted);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ===== 响应式 ===== */
@media (max-width: 63.99em) {
  .mobile-topbar { display: flex; }
  .sidebar { transform: translateX(-100%); width: 264px; }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 40px rgba(0,0,0,0.5); }
  .main-content { margin-left: 0; padding-top: 56px; }
  .footer { margin-left: 0; }
  .sticky-cta { left: 0; }
  .container { padding: 0 24px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 39.9375em) {
  .container { padding: 0 20px; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-text { display: none; }
  .sticky-cta { padding: 12px 16px; }
  .cta-form { max-width: none; }
  .article-title { font-size: 24px; }
  .article-meta { gap: 12px; flex-wrap: wrap; }
  .breadcrumb { padding-top: 20px; font-size: 12px; }
  .footer .container { padding: 32px 20px 16px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category1 */
:root {
  --color-bg: #050B18;
  --color-panel: #0B1526;
  --color-glass: rgba(255,255,255,0.04);
  --color-glass-strong: rgba(255,255,255,0.08);
  --color-border: rgba(255,255,255,0.10);
  --color-border-bright: rgba(255,255,255,0.16);
  --color-accent: #2DD4BF;
  --color-accent-hover: #5EEAD4;
  --color-accent-deep: #14B8A6;
  --color-accent-cyan: #0891B2;
  --color-amber: #F59E0B;
  --color-text: #E5EAF2;
  --color-text-secondary: #94A3B8;
  --color-text-weak: #64748B;

  --sp-section: 88px;
  --sp-section-mobile: 56px;
  --sp-content: 40px;
  --sp-content-mobile: 20px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-btn: 10px;

  --shadow-card: 0 12px 32px rgba(0,0,0,0.35), 0 0 24px rgba(45,212,191,0.08);
  --shadow-btn: 0 8px 24px rgba(45,212,191,0.25);
  --shadow-btn-hover: 0 10px 28px rgba(45,212,191,0.40);

  --font-sans: "PingFang SC","Microsoft YaHei","HarmonyOS Sans SC","Noto Sans CJK SC",sans-serif;
  --font-mono: "JetBrains Mono","SFMono-Regular",Consolas,monospace;

  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  z-index: 0;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-accent-hover); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

p { text-align: justify; }
h1, h2, h3, h4, h5 {
  font-family: var(--font-sans);
  text-wrap: balance;
}

.grid-container {
  max-width: 1200px;
  padding-left: var(--sp-content);
  padding-right: var(--sp-content);
}

.off-canvas-content {
  margin-left: 264px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
  background: transparent;
}

/* ---------- 桌面端侧边栏 ---------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 264px;
  background: var(--color-panel);
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  padding: 28px 16px 20px;
  z-index: 40;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 20px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45,212,191,0.12);
  border: 1px solid rgba(45,212,191,0.35);
  border-radius: 10px;
  color: var(--color-accent);
  font-size: 18px;
}

.logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.3px;
}

.logo-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(45,212,191,0.12);
  border: 1px solid rgba(45,212,191,0.30);
  border-radius: 20px;
  padding: 2px 8px;
  font-family: var(--font-mono);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-left: 2px solid transparent;
  min-height: 44px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.sidebar-nav a i {
  width: 20px;
  text-align: center;
  font-size: 15px;
  color: inherit;
}

.sidebar-nav a:hover {
  background: rgba(45,212,191,0.08);
  color: #fff;
}

.sidebar-nav a.active {
  background: rgba(255,255,255,0.06);
  color: var(--color-text);
  border-left-color: var(--color-accent);
  font-weight: 600;
}

.sidebar-nav a.active i {
  color: var(--color-accent);
}

.sidebar-status {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 12px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 12px;
  color: var(--color-text-weak);
  font-size: 13px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: 0 0 8px;
  position: relative;
}

.status-dot.online {
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(45,212,191,0.6);
}

.status-dot.maintenance {
  background: var(--color-amber);
  box-shadow: 0 0 8px rgba(245,158,11,0.6);
}

/* ---------- 移动端顶栏 ---------- */
.mobile-topbar {
  display: none;
  position: sticky;
  top: 0;
  height: 56px;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(5,11,24,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  z-index: 30;
}

.mobile-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.mobile-toggle:hover { background: rgba(255,255,255,0.06); }

.mobile-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.3px;
}

.mobile-topbar .btn-sm {
  height: 36px;
  padding: 0 16px;
  font-size: 13px;
}

/* ---------- Off-canvas 抽屉 ---------- */
.off-canvas {
  background: var(--color-panel) !important;
  border-right: 1px solid rgba(255,255,255,0.08) !important;
  width: 280px;
}

.off-canvas .sidebar-logo {
  padding: 20px 12px;
  margin-bottom: 16px;
}

.off-canvas .sidebar-nav a {
  min-height: 48px;
}

.js-off-canvas-overlay.is-overlay-fixed {
  background: rgba(0,0,0,0.6) !important;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  border: none;
  cursor: pointer;
  text-decoration: none;
  font-family: var(--font-sans);
  transition: all var(--transition);
  min-height: 44px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-deep), var(--color-accent-cyan));
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn-hover);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 16px rgba(45,212,191,0.2);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(45,212,191,0.06);
}

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
  min-height: 40px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--color-text-weak);
}

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

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

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

.breadcrumb-current {
  color: var(--color-accent);
  font-weight: 500;
}

/* ---------- 页面 Hero ---------- */
.page-hero {
  position: relative;
  padding: 56px 0 64px;
  background:
    linear-gradient(to bottom, rgba(5,11,24,0.72), rgba(5,11,24,0.92)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.page-hero-title {
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  max-width: 780px;
  margin-bottom: 16px;
  letter-spacing: 0.4px;
}

.page-hero-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-bottom: 28px;
  line-height: 1.8;
}

.page-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

/* ---------- 分区头部 ---------- */
.section {
  padding: var(--sp-section) 0;
}

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 500;
}

.section-head h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
  margin: 0;
}

/* ---------- 图文区 ---------- */
.section-visual-guide {
  background: transparent;
}

.guide-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  position: relative;
}

.guide-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5,11,24,0.05) 0%, rgba(5,11,24,0.35) 100%);
  pointer-events: none;
}

.guide-image img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.guide-copy {
  padding-left: 16px;
}

.guide-copy h2 {
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.4;
}

.guide-copy p {
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.6;
}

.check-list li::before {
  content: "";
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  margin-top: 2px;
  border-radius: 50%;
  background: rgba(45,212,191,0.14);
  border: 1px solid rgba(45,212,191,0.5);
  position: relative;
}

.check-list li::after {
  content: "✓";
  position: absolute;
  font-size: 11px;
  color: var(--color-accent);
  font-weight: 700;
}

/* 简化 check-list 处理 */
.check-list li {
  position: relative;
  padding-left: 34px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 4px;
  margin: 0;
}

.check-list li::after {
  position: absolute;
  left: 5px;
  top: 2px;
}

.check-list li::after {
  content: "✓";
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 700;
}

/* ---------- 竖线步骤 ---------- */
.section-steps {
  background: rgba(11,21,38,0.5);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.steps-vertical {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
  padding-left: 0;
}

.steps-vertical::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), rgba(45,212,191,0.15));
  border-radius: 2px;
}

.step-item {
  position: relative;
  display: flex;
  gap: 24px;
  padding: 20px 0 36px;
}

.step-item:last-child {
  padding-bottom: 0;
}

.step-index {
  width: 54px;
  height: 54px;
  flex: 0 0 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-panel);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 24px rgba(45,212,191,0.2);
  position: relative;
  z-index: 1;
}

.step-body {
  padding-top: 2px;
  flex: 1;
  max-width: 560px;
}

.step-body h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.step-body p {
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.8;
  text-align: justify;
}

/* ---------- FAQ 手风琴 ---------- */
.section-faq .grid-container {
  max-width: 960px;
}

.accordion {
  list-style: none;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}

.accordion-item:hover {
  border-color: rgba(255,255,255,0.16);
}

.accordion-item.is-active {
  border-color: rgba(45,212,191,0.4);
  background: rgba(255,255,255,0.05);
}

.accordion-title {
  display: block;
  background: transparent !important;
  border: none !important;
  padding: 20px 56px 20px 22px !important;
  color: var(--color-text) !important;
  font-size: 17px !important;
  font-weight: 600 !important;
  line-height: 1.5 !important;
  position: relative;
  cursor: pointer;
  border-radius: var(--radius-md) !important;
  min-height: 44px;
}

.accordion-title:hover {
  background: rgba(45,212,191,0.05) !important;
  color: var(--color-accent) !important;
}

.accordion-title::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--color-accent);
  font-weight: 400;
  transition: transform var(--transition);
}

.accordion-item.is-active .accordion-title::after {
  content: "−";
  font-size: 24px;
}

.accordion-content {
  padding: 0 22px 20px !important;
  background: transparent !important;
  border: none !important;
  color: var(--color-text-secondary) !important;
  font-size: 15px;
  line-height: 1.8;
}

.accordion-content p {
  text-align: justify;
  margin-bottom: 10px;
}

.accordion-content p:last-child {
  margin-bottom: 0;
}

/* ---------- CTA 块 ---------- */
.section-cta-block {
  padding-top: 0;
}

.cta-block {
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background-image: radial-gradient(circle at 20% 20%, rgba(45,212,191,0.10), transparent 50%);
}

.cta-block h2 {
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
}

.cta-block p {
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 24px;
  text-align: center;
  line-height: 1.8;
}

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

/* ---------- 页脚 ---------- */
.footer {
  background: #080F1E;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 56px 0 40px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 14px;
}

.footer-brand h4 i {
  color: var(--color-accent);
}

.footer-brand p {
  color: var(--color-text-weak);
  font-size: 14px;
  line-height: 1.7;
  text-align: justify;
  max-width: 380px;
}

.footer-col h5 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
}

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

.footer-col a {
  color: var(--color-text-weak);
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  text-align: center;
  color: var(--color-text-weak);
  font-size: 13px;
}

.footer-bottom a {
  color: var(--color-text-weak);
}

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

/* ---------- 固定转化条 ---------- */
.convert-bar {
  position: fixed;
  left: 264px;
  right: 0;
  bottom: 0;
  min-height: 72px;
  background: rgba(5,11,24,0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255,255,255,0.08);
  z-index: 50;
  display: flex;
  align-items: center;
}

.convert-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  width: 100%;
}

.convert-text {
  font-size: 15px;
  color: var(--color-text);
  font-weight: 500;
  text-align: left;
  white-space: nowrap;
}

.convert-form {
  display: flex;
  gap: 10px;
  max-width: 440px;
  width: 100%;
  margin: 0;
}

.convert-form input {
  flex: 1;
  height: 42px;
  padding: 0 16px;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.30);
  background: rgba(255,255,255,0.04);
  color: var(--color-text);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 14px;
  font-family: var(--font-sans);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.convert-form input::placeholder {
  color: var(--color-text-weak);
}

.convert-form input:focus {
  outline: none;
  border-bottom-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(45,212,191,0.15);
}

.convert-form .btn {
  height: 42px;
  min-height: 42px;
  padding: 0 20px;
  font-size: 14px;
  flex-shrink: 0;
}

.convert-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-weak);
  font-size: 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.convert-close:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.05);
}

/* ---------- Toast ---------- */
.page-toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-panel);
  border: 1px solid rgba(45,212,191,0.35);
  color: var(--color-text);
  padding: 14px 24px;
  border-radius: var(--radius-md);
  z-index: 99;
  box-shadow: var(--shadow-card);
  font-size: 14px;
  animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ---------- 响应式 ---------- */
@media (max-width: 63.9375em) {
  .sidebar {
    display: none;
  }

  .mobile-topbar {
    display: flex;
  }

  .off-canvas-content {
    margin-left: 0;
  }

  .convert-bar {
    left: 0;
    min-height: 64px;
  }

  .convert-inner {
    grid-template-columns: 1fr auto;
    gap: 12px;
    padding: 10px var(--sp-content-mobile);
  }

  .convert-text {
    display: none;
  }

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

  .grid-container {
    padding-left: var(--sp-content-mobile);
    padding-right: var(--sp-content-mobile);
  }

  .guide-copy {
    padding-left: 0;
    margin-top: 24px;
  }

  .page-hero {
    padding: 40px 0 48px;
  }

  .cta-block {
    padding: 36px 24px;
  }
}

@media (max-width: 39.9375em) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-col {
    gap: 8px;
  }

  .convert-inner {
    grid-template-columns: 1fr;
  }

  .convert-form {
    max-width: 100%;
  }

  .convert-close {
    position: absolute;
    top: -38px;
    right: 4px;
  }

  .convert-bar {
    padding-bottom: calc(env(safe-area-inset-bottom, 0px));
  }

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

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

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

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

  .steps-vertical::before {
    left: 20px;
  }

  .step-index {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    font-size: 14px;
  }

  .step-item {
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }

  .btn:hover {
    transform: none;
  }
}

/* roulang page: category2 */
:root {
  --bg-primary: #050B18;
  --bg-panel: #0B1526;
  --bg-panel-light: #0E1A2B;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.08);
  --bg-input: rgba(255,255,255,0.03);
  --border-white: rgba(255,255,255,0.10);
  --border-white-light: rgba(255,255,255,0.16);
  --accent: #2DD4BF;
  --accent-hover: #5EEAD4;
  --accent-deep: #14B8A6;
  --accent-deep-2: #0891B2;
  --accent-gradient: linear-gradient(135deg, #14B8A6, #0891B2);
  --text-primary: #E5EAF2;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --warning: #F59E0B;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-btn: 10px;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.35), 0 0 24px rgba(45,212,191,0.08);
  --shadow-btn: 0 8px 24px rgba(45,212,191,0.25);
  --shadow-btn-hover: 0 10px 32px rgba(45,212,191,0.40);
  --transition: 0.25s ease;
  --sidebar-width: 264px;
  --font-sans: "PingFang SC","Microsoft YaHei","HarmonyOS Sans SC","Noto Sans CJK SC",sans-serif;
  --font-mono: "JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --section-space: 88px;
  --section-space-mobile: 56px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  background-image: radial-gradient(circle at 80% 20%, rgba(45,212,191,0.06), transparent 40%), url("data:image/svg+xml,%3Csvg width='56' height='56' viewBox='0 0 56 56' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M56 0H0v56' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='1'/%3E%3C/svg%3E");
  background-attachment: fixed;
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
a:focus, button:focus, input:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
img { max-width: 100%; display: block; height: auto; }
input, button, textarea { font-family: inherit; }

.mono { font-family: var(--font-mono); }

/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
@media (max-width: 1023px) { .container { padding: 0 24px; } }
@media (max-width: 639px) { .container { padding: 0 20px; } }

/* 左右整体布局 */
.main-content { margin-left: var(--sidebar-width); min-height: 100vh; display: flex; flex-direction: column; }
@media (max-width: 1023px) {
  .main-content { margin-left: 0; }
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
  background: var(--bg-panel); border-right: 1px solid var(--border-white);
  display: flex; flex-direction: column; z-index: 100; padding: 0;
}
.sidebar-logo {
  padding: 32px 24px 28px; display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sidebar-logo .logo-icon {
  width: 38px; height: 38px; border-radius: var(--radius-md);
  background: var(--accent-gradient); display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 17px; box-shadow: var(--shadow-btn);
}
.sidebar-logo .logo-text { font-size: 19px; font-weight: 700; color: var(--text-primary); letter-spacing: 0.5px; line-height: 1.3; }
.sidebar-logo .logo-text small { display: block; font-size: 11px; font-weight: 400; color: var(--text-muted); letter-spacing: 2px; margin-top: 1px; }
.sidebar-nav { flex: 1; padding: 20px 12px; display: flex; flex-direction: column; gap: 4px; overflow-y: auto; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px; padding: 12px 16px;
  color: var(--text-secondary); font-size: 15px; border-radius: var(--radius-md);
  position: relative; transition: all var(--transition); line-height: 1.4;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 15px; }
.sidebar-nav a:hover { background: rgba(45,212,191,0.08); color: #fff; }
.sidebar-nav a.active {
  background: var(--bg-card-hover); color: var(--accent); font-weight: 600;
}
.sidebar-nav a.active::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 22px; background: var(--accent); border-radius: 0 3px 3px 0;
  box-shadow: 0 0 10px rgba(45,212,191,0.6);
}
.sidebar-status {
  padding: 20px 24px; border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted);
}
.sidebar-status .status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 6px rgba(45,212,191,0.6); animation: pulse 2s infinite; }
.sidebar-status .status-dot.warning { background: var(--warning); box-shadow: 0 0 6px rgba(245,158,11,0.6); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

/* ===== 移动端顶栏 ===== */
.mobile-topbar {
  display: none; position: fixed; top: 0; left: 0; right: 0; height: 56px; z-index: 90;
  background: rgba(5,11,24,0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-white);
  align-items: center; padding: 0 16px; gap: 12px;
}
@media (max-width: 1023px) {
  .mobile-topbar { display: flex; }
  .sidebar { display: none; }
}
.mobile-topbar .menu-toggle {
  width: 44px; height: 44px; background: transparent; border: none; color: var(--text-primary);
  font-size: 20px; cursor: pointer; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md);
  transition: background var(--transition);
}
.mobile-topbar .menu-toggle:hover { background: rgba(255,255,255,0.06); }
.mobile-logo { flex: 1; display: flex; align-items: center; gap: 8px; color: var(--text-primary); font-weight: 600; font-size: 17px; }
.mobile-logo i { color: var(--accent); font-size: 16px; }

/* 移动端抽屉 */
.drawer-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 200; opacity: 0; transition: opacity 0.3s; }
.drawer-overlay.show { opacity: 1; pointer-events: auto; }
.mobile-drawer {
  position: fixed; top: 0; left: 0; bottom: 0; width: 280px; max-width: 85%;
  background: var(--bg-panel); z-index: 210; overflow-y: auto;
  transform: translateX(-100%); transition: transform 0.3s cubic-bezier(0.77,0,0.18,1);
  display: flex; flex-direction: column; border-right: 1px solid var(--border-white);
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 20px 16px; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.drawer-header .logo-text { color: #fff; font-weight: 700; font-size: 17px; }
.drawer-header .logo-text i { color: var(--accent); margin-right: 8px; }
.drawer-close {
  width: 44px; height: 44px; background: transparent; border: none; color: var(--text-secondary);
  font-size: 18px; cursor: pointer; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center;
}
.drawer-close:hover { background: rgba(255,255,255,0.06); color: #fff; }
.drawer-nav { flex: 1; padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; }
.drawer-nav a {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  color: var(--text-secondary); font-size: 15px; border-radius: var(--radius-md);
  min-height: 48px; transition: all var(--transition);
}
.drawer-nav a i { width: 20px; text-align: center; }
.drawer-nav a:hover { background: rgba(45,212,191,0.08); color: #fff; }
.drawer-nav a.active { background: rgba(45,212,191,0.12); color: var(--accent); font-weight: 600; }
.drawer-status { padding: 20px; border-top: 1px solid rgba(255,255,255,0.06); display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); }
.drawer-status .status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 6px rgba(45,212,191,0.6); }

/* ===== 页面头部 ===== */
.page-header {
  padding: 56px 40px 24px; max-width: 1200px; margin: 0 auto; width: 100%;
}
@media (max-width: 1023px) { .page-header { padding: 76px 24px 20px; } }
@media (max-width: 639px) { .page-header { padding: 72px 20px 16px; } }
.breadcrumb {
  font-size: 13px; color: var(--text-muted); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-secondary); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .current { color: var(--text-muted); }
.breadcrumb .separator { color: rgba(255,255,255,0.2); }
.page-header h1 {
  font-size: clamp(32px, 4vw, 46px); font-weight: 700; line-height: 1.2;
  color: var(--text-primary); text-wrap: balance; letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.page-lead {
  font-size: 16px; color: var(--text-secondary); max-width: 720px; line-height: 1.8; text-align: justify;
}

/* ===== 区块通用 ===== */
.section { padding: var(--section-space) 40px; max-width: 1200px; margin: 0 auto; width: 100%; }
@media (max-width: 1023px) { .section { padding: var(--section-space-mobile) 24px; } }
@media (max-width: 639px) { .section { padding: var(--section-space-mobile) 20px; } }
.section-head { margin-bottom: 36px; }
.section-head .section-tag { display: inline-block; font-size: 12px; color: var(--accent); font-family: var(--font-mono); letter-spacing: 2px; margin-bottom: 8px; text-transform: uppercase; }
.section-head h2 {
  font-size: clamp(24px, 2.6vw, 32px); font-weight: 600; color: var(--text-primary);
  margin-bottom: 12px; line-height: 1.3; text-wrap: balance;
}
.section-head p { color: var(--text-secondary); max-width: 680px; line-height: 1.75; font-size: 15px; }

/* 分隔线 */
.section-divider { border: 0; border-top: 1px solid rgba(255,255,255,0.06); margin: 0; }

/* ===== 两列信息卡 ===== */
.info-cards-section { padding-top: 24px; }
.info-cards-section .grid-x { margin: 0 -12px; }
.info-cards-section .cell { padding: 0 12px; margin-bottom: 24px; }
.glass-card {
  background: var(--bg-card); border: 1px solid var(--border-white);
  border-radius: var(--radius-lg); padding: 28px; transition: all var(--transition);
  height: 100%;
}
.glass-card:hover {
  transform: translateY(-4px); border-color: var(--border-white-light);
  box-shadow: var(--shadow-card); background: var(--bg-card-hover);
}
.info-card { display: flex; flex-direction: column; gap: 16px; position: relative; overflow: hidden; }
.info-card::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(45,212,191,0.6), transparent);
}
.info-card-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--accent-gradient);
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: 20px;
  box-shadow: var(--shadow-btn); margin-bottom: 4px;
}
.info-card h3 { font-size: 20px; font-weight: 600; color: var(--text-primary); }
.info-card p { color: var(--text-secondary); font-size: 15px; line-height: 1.75; text-align: justify; }
.info-card .card-link { margin-top: auto; color: var(--accent); font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }
.info-card .card-link i { transition: transform var(--transition); }
.info-card .card-link:hover i { transform: translateX(4px); }

/* ===== 对比表 ===== */
.compare-section { padding-top: 24px; }
.compare-section .table-wrap {
  background: var(--bg-panel); border: 1px solid var(--border-white);
  border-radius: var(--radius-lg); overflow-x: auto; box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.compare-section table {
  width: 100%; border-collapse: collapse; font-size: 15px;
}
.compare-section table thead th {
  background: #0D1A2D; color: var(--accent); font-weight: 600; padding: 16px 20px;
  text-align: left; border-bottom: 1px solid var(--border-white); white-space: nowrap;
  font-family: var(--font-sans); font-size: 14px; letter-spacing: 0.5px;
}
.compare-section table tbody td {
  padding: 14px 20px; color: var(--text-secondary); border-bottom: 1px solid rgba(255,255,255,0.04);
  line-height: 1.6;
}
.compare-section table tbody tr:nth-child(even) { background: rgba(255,255,255,0.02); }
.compare-section table tbody tr:nth-child(odd) { background: transparent; }
.compare-section table tbody tr:hover { background: rgba(45,212,191,0.06); }
.compare-section table tbody tr:last-child td { border-bottom: none; }
.compare-section table tbody td:first-child { color: var(--text-primary); font-weight: 500; }
.compare-section table .level-high { color: var(--accent); font-weight: 600; }
.compare-section table .level-mid { color: var(--warning); font-weight: 600; }
.compare-section table .level-base { color: var(--text-secondary); font-weight: 500; }
.table-note { margin-top: 14px; font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ===== 推荐卡 ===== */
.recommend-section { padding-top: 24px; }
.recommend-section .grid-x { margin: 0 -12px; }
.recommend-section .cell { padding: 0 12px; margin-bottom: 24px; }
.recommend-card {
  background: var(--bg-card); border: 1px solid var(--border-white); border-radius: var(--radius-lg);
  overflow: hidden; transition: all var(--transition); height: 100%; display: flex; flex-direction: column;
}
.recommend-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: var(--border-white-light); }
.recommend-card .card-img { position: relative; overflow: hidden; aspect-ratio: 16/9; background: var(--bg-panel); }
.recommend-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.recommend-card:hover .card-img img { transform: scale(1.04); }
.recommend-card .card-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(5,11,24,0.6) 0%, transparent 60%); }
.recommend-card .card-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.recommend-card .card-tag {
  display: inline-block; font-size: 12px; color: var(--accent); border: 1px solid rgba(45,212,191,0.35);
  padding: 2px 10px; border-radius: 999px; margin-bottom: 12px; width: fit-content;
  font-family: var(--font-mono); letter-spacing: 0.5px;
}
.recommend-card h3 { font-size: 18px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.recommend-card p { color: var(--text-secondary); font-size: 14px; line-height: 1.7; margin-bottom: 16px; flex: 1; }
.recommend-card .card-link { color: var(--accent); font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }
.recommend-card .card-link i { transition: transform var(--transition); }
.recommend-card .card-link:hover i { transform: translateX(4px); }

/* ===== CTA区 ===== */
.cta-section { padding-bottom: 100px; }
.cta-card {
  background: linear-gradient(135deg, rgba(45,212,191,0.12), rgba(8,145,178,0.08)), var(--bg-panel);
  border: 1px solid rgba(45,212,191,0.25); border-radius: var(--radius-xl);
  padding: 40px; text-align: center; position: relative; overflow: hidden;
}
.cta-card::before {
  content: ""; position: absolute; top: -50%; left: -20%; width: 300px; height: 300px;
  border-radius: 50%; background: radial-gradient(circle, rgba(45,212,191,0.15), transparent 70%); pointer-events: none;
}
.cta-card h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 600; color: var(--text-primary); margin-bottom: 10px; }
.cta-card p { color: var(--text-secondary); font-size: 15px; margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }
.cta-card .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn-primary, .btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; font-size: 15px; font-weight: 600; border-radius: var(--radius-btn);
  cursor: pointer; transition: all var(--transition); text-decoration: none; line-height: 1.4; min-height: 44px; border: none;
}
.btn-primary { background: var(--accent-gradient); color: #fff; box-shadow: var(--shadow-btn); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-btn-hover); color: #fff; }
.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-btn); }
.btn-ghost {
  background: transparent; border: 1px solid rgba(255,255,255,0.25); color: var(--text-primary);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: rgba(45,212,191,0.05); }
.btn-ghost:active { transform: translateY(0); }
.btn-sm { padding: 9px 18px; font-size: 14px; min-height: 40px; }

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-panel-light); border-top: 1px solid var(--border-white);
  padding: 56px 40px 24px; margin-left: var(--sidebar-width);
}
@media (max-width: 1023px) { .footer { margin-left: 0; padding: 48px 24px 24px; } }
@media (max-width: 639px) { .footer { padding: 40px 20px 20px; } }
.footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
@media (max-width: 639px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
.footer-brand h4 { font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-brand h4 i { color: var(--accent); }
.footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.65; max-width: 360px; }
.footer-col h5 { font-size: 14px; font-weight: 600; color: var(--text-secondary); margin-bottom: 14px; letter-spacing: 1px; text-transform: uppercase; }
.footer-col a { display: block; color: var(--text-muted); font-size: 14px; padding: 4px 0; transition: color var(--transition), padding-left var(--transition); }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  max-width: 1200px; margin: 0 auto; border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 20px; color: var(--text-muted); font-size: 13px; text-align: left; line-height: 1.6;
}

/* ===== 固定转化条 ===== */
.fixed-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 150;
  background: rgba(5,11,24,0.85); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border-white); padding: 10px 24px;
  min-height: 64px; display: none;
}
@media (min-width: 1024px) { .fixed-bar { left: var(--sidebar-width); } }
.fixed-bar .bar-inner {
  max-width: 1200px; margin: 0 auto; display: flex; align-items: center; gap: 16px; justify-content: space-between; flex-wrap: wrap;
}
.fixed-bar .bar-text { color: var(--text-secondary); font-size: 14px; white-space: nowrap; }
.fixed-bar .bar-form { display: flex; gap: 10px; align-items: center; flex: 1; max-width: 440px; }
.fixed-bar .bar-form input[type="text"] {
  flex: 1; padding: 10px 14px; background: var(--bg-input); border: none; border-bottom: 1px solid rgba(255,255,255,0.25);
  color: var(--text-primary); font-size: 14px; border-radius: 0; transition: all var(--transition);
  min-height: 40px;
}
.fixed-bar .bar-form input[type="text"]:focus { border-bottom-color: var(--accent); box-shadow: 0 2px 8px rgba(45,212,191,0.2); outline: none; }
.fixed-bar .bar-close {
  width: 44px; height: 44px; background: transparent; border: none; color: var(--text-muted);
  font-size: 18px; cursor: pointer; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.fixed-bar .bar-close:hover { color: #fff; background: rgba(255,255,255,0.06); }
body { padding-bottom: 0; }
body.has-fixed-bar { padding-bottom: 96px; }
@media (max-width: 639px) {
  .fixed-bar .bar-text { display: none; }
  .fixed-bar .bar-form { max-width: 100%; flex: 1; }
  .fixed-bar .btn-primary { padding: 10px 16px; font-size: 14px; min-height: 40px; }
  .fixed-bar .bar-close { width: 40px; height: 40px; }
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .mobile-topbar { display: flex; }
  .sidebar { display: none; }
  .drawer-overlay { display: block; visibility: hidden; }
  .drawer-overlay.show { visibility: visible; pointer-events: auto; }
}
@media (min-width: 1024px) {
  .mobile-drawer, .drawer-overlay { display: none !important; }
  .fixed-bar { display: block; }
}
@media (min-width: 1024px) and (max-width: 1100px) {
  .fixed-bar { padding: 10px 20px; }
  .fixed-bar .bar-text { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .recommend-card:hover { transform: none; }
  .glass-card:hover { transform: none; }
}

/* Foundation 覆盖 */
.grid-container { max-width: 1200px; padding: 0; }
.grid-x { display: flex; flex-wrap: wrap; }
.cell { min-width: 0; }
a:not(.btn-primary):not(.btn-ghost) { color: var(--accent); }
a:not(.btn-primary):not(.btn-ghost):visited { color: var(--accent-deep); }
table:not(.no-default) { background: transparent; border: none; }
table:not(.no-default) thead th { background: transparent; }
table:not(.no-default) tbody tr { background: transparent; }

/* roulang page: category3 */
:root {
  --bg-primary: #050B18;
  --bg-panel: #0B1526;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.08);
  --border-card: rgba(255,255,255,0.10);
  --border-card-hover: rgba(255,255,255,0.16);
  --accent: #2DD4BF;
  --accent-hover: #5EEAD4;
  --accent-deep: #14B8A6;
  --accent-cyan: #0891B2;
  --warning: #F59E0B;
  --text-primary: #E5EAF2;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-btn: 10px;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.35), 0 0 24px rgba(45,212,191,0.08);
  --shadow-cta: 0 16px 48px rgba(0,0,0,0.42), 0 0 40px rgba(45,212,191,0.12);
  --sidebar-w: 264px;
  --spacer: 88px;
  --spacer-mobile: 56px;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 96px;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  z-index: 0;
}
a {
  color: var(--accent);
  text-decoration: none;
  transition: color .2s ease;
}
a:hover {
  color: var(--accent-hover);
}
img {
  max-width: 100%;
  display: block;
}
button, input, select, textarea {
  font-family: inherit;
}
p {
  margin: 0 0 20px;
  text-align: justify;
}
h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  text-wrap: balance;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
@media (min-width: 64em) {
  .container {
    padding: 0 40px;
  }
}

/* 按钮 */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  min-height: 44px;
  transition: all .25s ease;
  cursor: pointer;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-deep), var(--accent-cyan));
  box-shadow: 0 8px 24px rgba(45,212,191,0.25);
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(45,212,191,0.40);
}
.btn-primary:focus-visible,
.btn-ghost:focus-visible {
  outline: 2px solid var(--accent-hover);
  outline-offset: 2px;
}
.btn-ghost {
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.02);
}
.btn-ghost:hover {
  color: var(--accent-hover);
  border-color: var(--accent);
  background: rgba(45,212,191,0.06);
}

/* 桌面侧边栏 */
.app-sidebar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-panel);
  border-right: 1px solid rgba(255,255,255,0.08);
  padding: 28px 0 24px;
  flex-direction: column;
  justify-content: space-between;
  z-index: 60;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 20px;
  text-decoration: none;
}
.sidebar-brand .brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(45,212,191,0.18), rgba(8,145,178,0.18));
  border: 1px solid rgba(45,212,191,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  color: var(--accent);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.brand-text strong {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: .2px;
}
.brand-text span {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
}
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: all .22s ease;
  text-decoration: none;
}
.sidebar-nav a i {
  width: 20px;
  text-align: center;
  font-size: 16px;
  color: var(--text-muted);
  transition: color .22s ease;
}
.sidebar-nav a:hover {
  color: #fff;
  background: rgba(45,212,191,0.08);
}
.sidebar-nav a:hover i {
  color: var(--accent);
}
.sidebar-nav a.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}
.sidebar-nav a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  border-radius: 3px;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(45,212,191,0.5);
}
.sidebar-nav a.active i {
  color: var(--accent);
}
.sidebar-status {
  margin: 20px 24px 0;
  padding: 14px 16px;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.02);
  display: flex;
  align-items: center;
  gap: 10px;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(45,212,191,0.7);
  flex-shrink: 0;
}
.sidebar-status span {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}
.sidebar-status span strong {
  display: block;
  color: var(--text-primary);
  font-weight: 600;
}

/* 移动端顶栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 55;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 16px;
  background: rgba(5,11,24,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.topbar .menu-toggle {
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.topbar .menu-toggle:hover {
  background: rgba(255,255,255,0.06);
}
.topbar-brand {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}
.topbar-brand:hover {
  color: var(--accent-hover);
}
.topbar-cta {
  font-size: 13px;
  padding: 8px 16px;
}

/* Off-canvas 移动端抽屉 */
.off-canvas {
  background: var(--bg-panel);
}
.off-canvas .close-button {
  color: var(--text-primary);
}
.mobile-nav {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 16px;
}
.mobile-nav a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all .22s ease;
}
.mobile-nav a i {
  width: 20px;
  text-align: center;
  color: var(--text-muted);
}
.mobile-nav a:hover,
.mobile-nav a.active {
  background: rgba(45,212,191,0.06);
  border-color: rgba(45,212,191,0.15);
  color: var(--text-primary);
}
.mobile-nav a.active i {
  color: var(--accent);
}

/* 主内容区 */
.main-content {
  position: relative;
  z-index: 1;
  margin-left: 0;
  min-height: 100vh;
}

@media (min-width: 64em) {
  .app-sidebar {
    display: flex;
  }
  .topbar {
    display: none;
  }
  .main-content {
    margin-left: var(--sidebar-w);
  }
}

/* 内页 hero */
.inner-hero {
  position: relative;
  padding: 72px 0 56px;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.inner-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5,11,24,0.92) 0%, rgba(5,11,24,0.72) 45%, rgba(5,11,24,0.45) 100%);
}
.inner-hero::after {
  content: '';
  position: absolute;
  width: 620px;
  height: 620px;
  right: -140px;
  top: -200px;
  background: radial-gradient(circle, rgba(45,212,191,0.14), transparent 65%);
  pointer-events: none;
}
.inner-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 18px;
}
.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .current {
  color: var(--text-muted);
}
.breadcrumb .sep {
  color: var(--text-muted);
  margin: 0 4px;
}
.inner-hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  max-width: 640px;
}
.inner-hero .lead {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 0;
}

/* 引导区 */
.intro-section {
  padding: var(--spacer-mobile) 0 40px;
}
@media (min-width: 64em) {
  .intro-section {
    padding: var(--spacer) 0 56px;
  }
}
.intro-card {
  background: linear-gradient(145deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  height: 100%;
}
.intro-card .pic-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}
.intro-card .pic-wrap img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}
.intro-card .pic-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5,11,24,0.5), transparent 40%);
}
.intro-card .pic-badge {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  font-size: 13px;
  color: var(--accent);
  background: rgba(5,11,24,0.6);
  border: 1px solid rgba(45,212,191,0.25);
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: .5px;
}
.intro-card h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 22px 0 12px;
}
.intro-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 22px;
}
.intro-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid rgba(45,212,191,0.22);
  background: rgba(45,212,191,0.05);
  padding: 6px 14px;
  border-radius: 999px;
  transition: all .22s ease;
}
.chip i {
  color: var(--accent);
  font-size: 13px;
}
.chip:hover {
  border-color: rgba(45,212,191,0.45);
  color: var(--text-primary);
}

/* FAQ 版块 */
.faq-section {
  padding: 40px 0 var(--spacer-mobile);
}
@media (min-width: 64em) {
  .faq-section {
    padding: 56px 0 var(--spacer);
  }
}
.faq-group {
  margin-bottom: 48px;
}
.faq-group:last-child {
  margin-bottom: 0;
}
.faq-group h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.faq-group h2 i {
  color: var(--accent);
  font-size: 20px;
}
.faq-group > p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
  max-width: 720px;
}
.accordion {
  background: transparent;
}
.accordion-item {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.accordion-item.is-active {
  border-color: rgba(45,212,191,0.35);
  box-shadow: 0 0 0 1px rgba(45,212,191,0.08), 0 8px 24px rgba(0,0,0,0.25);
}
.accordion-title {
  display: block;
  position: relative;
  padding: 20px 56px 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: none;
  transition: background .22s ease, color .22s ease;
}
.accordion-title:hover,
.accordion-title:focus {
  background: rgba(45,212,191,0.04);
  color: var(--accent-hover);
}
.accordion-item .accordion-title::before {
  content: '+';
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border: 1px solid rgba(45,212,191,0.4);
  border-radius: 50%;
  font-size: 16px;
  font-weight: 400;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45,212,191,0.07);
  transition: transform .25s ease, background .25s ease;
  line-height: 1;
}
.accordion-item.is-active .accordion-title::before {
  content: '−';
  transform: translateY(-50%) rotate(180deg);
  background: rgba(45,212,191,0.18);
}
.accordion-content {
  padding: 0 24px 20px;
  background: rgba(255,255,255,0.015);
  border-top: 1px solid rgba(255,255,255,0.04);
}
.accordion-content p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 0;
  text-align: justify;
}

/* 提示标签 */
.tip-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 36px 0;
}
@media (min-width: 64em) {
  .tip-row {
    grid-template-columns: repeat(3, 1fr);
  }
}
.tip-tag {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  background: rgba(255,255,255,0.03);
  transition: all .25s ease;
}
.tip-tag:hover {
  transform: translateY(-3px);
  border-color: rgba(45,212,191,0.3);
  box-shadow: 0 12px 28px rgba(0,0,0,0.3);
}
.tip-tag .tip-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}
.tip-tag.warning .tip-icon {
  color: var(--warning);
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.35);
}
.tip-tag.info .tip-icon {
  color: var(--accent);
  background: rgba(45,212,191,0.1);
  border: 1px solid rgba(45,212,191,0.3);
}
.tip-tag .tip-text strong {
  display: block;
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 4px;
}
.tip-tag .tip-text span {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* CTA 玻璃条 */
.cta-section {
  padding: 40px 0 var(--spacer-mobile);
}
@media (min-width: 64em) {
  .cta-section {
    padding: 56px 0 var(--spacer);
  }
}
.cta-glass {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 42px 32px;
  background: linear-gradient(145deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)),
              radial-gradient(circle at 80% 20%, rgba(45,212,191,0.12), transparent 55%);
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-cta);
  text-align: center;
}
.cta-glass h3 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.cta-glass p {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 28px;
  text-align: center;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* 页脚 */
.footer {
  position: relative;
  z-index: 1;
  background: var(--bg-panel);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 56px 0 28px;
  margin-top: 20px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 36px;
}
@media (min-width: 64em) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
  }
}
.footer-brand h4 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand h4 i {
  color: var(--accent);
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 340px;
}
.footer-col h5 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  transition: color .2s ease;
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

/* 固定转化条 */
.convert-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  background: rgba(5,11,24,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 12px 20px;
  min-height: 64px;
  transition: transform .3s ease, opacity .3s ease;
}
.convert-bar.hide-bar {
  transform: translateY(110%);
  opacity: 0;
  pointer-events: none;
}
.convert-text {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  display: none;
}
@media (min-width: 40em) {
  .convert-text {
    display: block;
  }
}
.convert-form {
  display: flex;
  gap: 8px;
  max-width: 440px;
  width: 100%;
}
.convert-form input {
  flex: 1;
  min-width: 0;
  height: 42px;
  padding: 0 16px;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-size: 14px;
  border-radius: 6px 6px 0 0;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.convert-form input:focus {
  border-bottom-color: var(--accent);
  box-shadow: 0 6px 16px rgba(45,212,191,0.1);
}
.convert-form input::placeholder {
  color: var(--text-muted);
}
.convert-form .btn-primary {
  height: 42px;
  min-height: 42px;
  padding: 0 18px;
  font-size: 14px;
}
.convert-close {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 18px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s ease;
}
.convert-close:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

/* 响应式微调 */
@media (max-width: 39.9375em) {
  .inner-hero {
    padding: 48px 0 40px;
  }
  .cta-glass {
    padding: 32px 20px;
  }
  .convert-bar {
    gap: 10px;
    padding: 10px 14px;
  }
  .convert-form input {
    height: 40px;
  }
  .convert-form .btn-primary {
    height: 40px;
    min-height: 40px;
    padding: 0 14px;
    font-size: 13px;
  }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}