/* roulang page: index */
:root {
  --primary: #1455e0;
  --primary-dark: #0e3fa8;
  --primary-light: #eaf0ff;
  --secondary: #05a6c6;
  --secondary-light: #e2f8fb;
  --accent: #f59e0b;
  --accent-light: #fff4e0;
  --text: #0d1b34;
  --text-weak: #5b6b85;
  --text-muted: #8a97ad;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --border: #e5eaf2;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(16, 28, 58, .06);
  --shadow-md: 0 6px 28px rgba(16, 28, 58, .08);
  --shadow-lg: 0 14px 48px rgba(16, 28, 58, .12);
  --space-section: 96px;
  --container-width: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .2s; }
ul, ol { list-style: none; }
button, input, select { font: inherit; }
button { cursor: pointer; border: none; background: none; }
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
}
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--surface); }
.section-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.02em;
  margin-bottom: 14px;
}
.section-sub {
  color: var(--text-weak);
  font-size: 17px;
  line-height: 1.7;
}
/* Header */
.lex-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.lex-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 72px;
  gap: 20px;
}
.lex-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -.4px;
  color: var(--text);
  flex-shrink: 0;
}
.lex-logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 19px;
  box-shadow: 0 6px 16px rgba(20, 85, 224, .35);
}
.lex-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.lex-nav-link {
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  transition: all .2s;
  white-space: nowrap;
}
.lex-nav-link:hover { color: var(--primary); background: var(--primary-light); }
.lex-nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.lex-header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.lex-search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #f1f4f9;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 8px 18px;
  min-width: 220px;
  transition: all .2s;
}
.lex-search i { color: var(--text-muted); font-size: 14px; }
.lex-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  width: 100%;
  color: var(--text);
}
.lex-search input::placeholder { color: var(--text-muted); }
.lex-search:focus-within {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(20, 85, 224, .12);
}
.lex-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 11px 24px;
  border-radius: 999px;
  transition: all .2s;
  border: 1px solid transparent;
  white-space: nowrap;
  line-height: 1;
}
.lex-btn i { font-size: 14px; }
.lex-btn-primary {
  background: linear-gradient(135deg, var(--primary), #1a6bff);
  color: #fff;
  box-shadow: 0 6px 18px rgba(20, 85, 224, .35);
}
.lex-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(20, 85, 224, .42); color: #fff; }
.lex-btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(20, 85, 224, .3); }
.lex-btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: #fff;
}
.lex-btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.lex-btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, .18);
}
.lex-btn-white:hover { transform: translateY(-2px); color: var(--primary-dark); box-shadow: 0 10px 30px rgba(0, 0, 0, .22); }
.lex-btn-block { width: 100%; }
.lex-nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #f1f4f9;
  color: var(--text);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: all .2s;
}
.lex-nav-toggle:hover { background: var(--primary-light); color: var(--primary); }
.lex-mobile-nav {
  display: none;
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 16px 24px 22px;
  flex-direction: column;
  gap: 2px;
}
.lex-mobile-link {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.lex-mobile-link:hover,
.lex-mobile-link.active { background: var(--primary-light); color: var(--primary); }
.lex-mobile-search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #f1f4f9;
  border-radius: 12px;
  padding: 11px 16px;
  margin: 12px 0;
}
.lex-mobile-search i { color: var(--text-muted); }
.lex-mobile-search input { border: none; background: transparent; outline: none; width: 100%; font-size: 15px; }
/* Hero */
.lex-hero {
  position: relative;
  background: linear-gradient(135deg, #0b1a38 0%, #102b5e 55%, #0b3f66 100%);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  padding: 120px 0 110px;
  overflow: hidden;
}
.lex-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(9, 22, 50, .82) 0%, rgba(9, 22, 50, .62) 48%, rgba(9, 22, 50, .35) 100%);
}
.lex-hero::after {
  content: "";
  position: absolute;
  width: 640px;
  height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20, 85, 224, .45), transparent 60%);
  top: -180px;
  right: -140px;
  pointer-events: none;
}
.lex-hero-inner { position: relative; z-index: 2; }
.lex-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 18px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.lex-hero-badge i { color: #ffd166; }
.lex-hero h1 {
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.03em;
  margin-bottom: 20px;
  max-width: 720px;
}
.lex-hero h1 .highlight {
  background: linear-gradient(135deg, #ffe29a, #ffd166);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.lex-hero p.lex-hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .88);
  max-width: 620px;
  margin-bottom: 34px;
}
.lex-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.lex-hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  color: rgba(255, 255, 255, .82);
  font-size: 14px;
}
.lex-hero-trust span { display: inline-flex; align-items: center; gap: 8px; }
.lex-hero-trust i { color: #ffd166; }
.lex-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 30px;
  max-width: 460px;
}
.lex-hero-stat {
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 14px;
  padding: 14px 16px;
  text-align: center;
  backdrop-filter: blur(6px);
}
.lex-hero-stat strong {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
}
.lex-hero-stat span { font-size: 12px; color: rgba(255, 255, 255, .72); }
/* Cards & Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
}
.badge-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-weak);
}
/* Feature cards */
.lex-features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.lex-feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: var(--shadow-sm);
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.lex-feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s;
}
.lex-feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.lex-feature-card:hover::before { transform: scaleX(1); }
.lex-feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
  transition: all .25s;
}
.lex-feature-card:hover .lex-feature-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(-6deg) scale(1.08);
}
.lex-feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.lex-feature-card p { font-size: 14px; color: var(--text-weak); line-height: 1.7; }
/* Guide / 分类入口 */
.lex-guide-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 28px;
}
.lex-guide-main {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-md);
  background: url('/assets/images/coverpic/cover-1.png') center/cover no-repeat;
}
.lex-guide-main::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(12deg, rgba(6, 16, 36, .85) 10%, rgba(6, 16, 36, .2) 60%, transparent 100%);
}
.lex-guide-main-content {
  position: relative;
  z-index: 2;
  padding: 36px;
  color: #fff;
  width: 100%;
}
.lex-guide-main-content h3 { font-size: 26px; font-weight: 800; margin-bottom: 8px; }
.lex-guide-main-content p { font-size: 15px; color: rgba(255, 255, 255, .85); margin-bottom: 16px; max-width: 80%; }
.lex-guide-main-content .lex-btn {
  background: #fff;
  color: var(--primary);
}
.lex-guide-main-content .lex-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, .25); }
.lex-guide-sub {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.lex-guide-sub-card {
  display: flex;
  gap: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: all .25s;
  align-items: center;
}
.lex-guide-sub-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
  border-color: var(--primary);
}
.lex-guide-sub-img {
  width: 74px;
  height: 74px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
}
.lex-guide-sub-text h4 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.lex-guide-sub-text p { font-size: 13.5px; color: var(--text-weak); line-height: 1.6; }
.lex-guide-sub-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
/* News */
.lex-news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.lex-news-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all .25s;
}
.lex-news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.lex-news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.lex-news-date { font-size: 13px; color: var(--text-muted); }
.lex-news-title { font-size: 18px; font-weight: 700; line-height: 1.5; margin-bottom: 8px; }
.lex-news-desc { font-size: 14px; color: var(--text-weak); line-height: 1.7; flex: 1; }
.lex-news-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.lex-news-more i { transition: transform .2s; }
.lex-news-card:hover .lex-news-more i { transform: translateX(4px); }
.lex-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  color: var(--text-weak);
  font-size: 16px;
  border: 1px dashed var(--border);
}
/* Steps */
.lex-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.lex-step {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 34px 24px 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all .25s;
}
.lex-step:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.lex-step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 6px 16px rgba(20, 85, 224, .3);
}
.lex-step h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.lex-step p { font-size: 13.5px; color: var(--text-weak); line-height: 1.65; }
/* Stats band */
.lex-stats-band {
  background: linear-gradient(135deg, #0b1a38, #0d2a5c, #094b6b);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 70px 0;
  position: relative;
  color: #fff;
}
.lex-stats-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(8, 20, 44, .78);
}
.lex-stats-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.lex-stat-item { text-align: center; }
.lex-stat-item strong {
  display: block;
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(135deg, #ffe29a, #ffd166);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}
.lex-stat-item span { font-size: 14px; color: rgba(255,255,255,.8); }
/* FAQ */
.lex-faq-accordion {}
.lex-faq-accordion .accordion-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all .2s;
}
.lex-faq-accordion .accordion-item:hover { border-color: var(--primary); }
.lex-faq-accordion .accordion-title {
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  padding: 22px 50px 22px 24px;
  line-height: 1.5;
  position: relative;
  transition: all .2s;
}
.lex-faq-accordion .accordion-title::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
  transition: transform .3s;
}
.lex-faq-accordion .accordion-item.is-active .accordion-title::after {
  transform: translateY(-50%) rotate(180deg);
  color: var(--primary);
}
.lex-faq-accordion .accordion-title:hover,
.lex-faq-accordion .accordion-item.is-active .accordion-title {
  background: var(--primary-light);
}
.lex-faq-accordion .accordion-content {
  border-bottom: none;
  background: var(--surface);
  padding: 4px 24px 22px;
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.75;
}
/* CTA */
.lex-cta {
  position: relative;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border-radius: var(--radius-lg);
  padding: 70px 60px;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.lex-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(9, 22, 50, .92), rgba(15, 48, 100, .72), rgba(6, 88, 110, .6));
}
.lex-cta-inner { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.lex-cta h2 { font-size: 30px; font-weight: 800; margin-bottom: 10px; }
.lex-cta p { font-size: 16px; color: rgba(255,255,255,.85); max-width: 480px; }
.lex-cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }
/* Footer */
.lex-footer {
  background: #0b1526;
  color: rgba(255,255,255,.72);
  padding: 72px 0 32px;
}
.lex-footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.lex-footer h4 { color: #fff; font-size: 17px; font-weight: 700; margin-bottom: 18px; }
.lex-footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.6); margin-top: 14px; }
.lex-footer-links a {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  color: rgba(255,255,255,.65);
  transition: all .2s;
}
.lex-footer-links a:hover { color: #fff; padding-left: 6px; }
.lex-footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.45);
}
.lex-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.lex-footer-brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  color: #fff;
}
/* Responsive */
@media (max-width: 1024px) {
  :root { --space-section: 76px; }
  .lex-features-grid { grid-template-columns: repeat(2, 1fr); }
  .lex-steps { grid-template-columns: repeat(2, 1fr); }
  .lex-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .lex-guide-grid { grid-template-columns: 1fr; }
  .lex-search { display: none; }
}
@media (max-width: 768px) {
  .lex-header-inner { height: 64px; padding: 0 18px; }
  .lex-logo-text { display: block; }
  .lex-nav { display: none; }
  .lex-nav-toggle { display: inline-flex; }
  .lex-header-actions .lex-btn-primary { display: none; }
  .lex-mobile-nav.open { display: flex; }
  .lex-hero { padding: 84px 0 76px; }
  .lex-hero h1 { font-size: 38px; }
  .lex-hero p.lex-hero-desc { font-size: 16px; }
  .lex-features-grid { grid-template-columns: 1fr; }
  .lex-news-grid { grid-template-columns: 1fr; }
  .lex-steps { grid-template-columns: 1fr; }
  .lex-stat-item strong { font-size: 32px; }
  .lex-cta { padding: 48px 28px; }
  .lex-cta-inner { flex-direction: column; text-align: center; }
  .lex-cta p { margin: 0 auto; }
  .lex-footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .lex-guide-main { min-height: 320px; }
  .lex-guide-main-content { padding: 24px; }
  .lex-guide-main-content p { max-width: 100%; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .lex-hero { padding: 72px 0 64px; }
  .lex-hero-stats { grid-template-columns: 1fr; }
  .lex-hero-actions .lex-btn { width: 100%; }
  .lex-section-title { font-size: 26px; }
  .lex-guide-sub-card { flex-direction: column; align-items: flex-start; }
  .lex-guide-sub-img { width: 100%; height: 160px; }
  .lex-footer-grid { grid-template-columns: 1fr; }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
    :root {
      --primary: #2563eb;
      --primary-dark: #1e4fd6;
      --primary-light: #60a5fa;
      --primary-50: #eff6ff;
      --accent: #10b981;
      --accent-dark: #059669;
      --accent-50: #d1fae5;
      --warning: #f59e0b;
      --warning-50: #fef3c7;
      --dark: #0f172a;
      --dark-800: #1e293b;
      --bg: #f8fafc;
      --card-bg: #ffffff;
      --text: #1e293b;
      --text-weak: #64748b;
      --text-light: #94a3b8;
      --border: #e2e8f0;
      --radius-lg: 22px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 10px 32px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
      --transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
      --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

    /* ========== 基础重置 ========== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-main);
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    img { max-width: 100%; display: block; object-fit: cover; }
    button, input { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; }
    button { cursor: pointer; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5 { line-height: 1.3; font-weight: 700; color: var(--dark); }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    @media screen and (max-width: 768px) {
      .container { padding: 0 18px; }
    }

    /* ========== Header / 导航 ========== */
    .lex-header {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 1000;
      transition: var(--transition);
    }
    .lex-header.scrolled {
      box-shadow: var(--shadow-sm);
    }
    .lex-header-inner {
      display: flex;
      align-items: center;
      gap: 24px;
      min-height: 72px;
    }
    .lex-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .lex-logo-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #4f68f8);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3);
    }
    .lex-logo-text {
      font-weight: 800;
      font-size: 20px;
      color: var(--dark);
      letter-spacing: 0.5px;
    }
    .lex-logo-text span { color: var(--primary); }
    .lex-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      margin-left: 12px;
    }
    .lex-nav-link {
      padding: 10px 20px;
      border-radius: 999px;
      color: var(--text-weak);
      font-weight: 600;
      font-size: 15px;
      position: relative;
      transition: var(--transition);
    }
    .lex-nav-link:hover {
      color: var(--primary);
      background: var(--primary-50);
    }
    .lex-nav-link.active {
      color: var(--primary);
      background: var(--primary-50);
    }
    .lex-header-actions {
      margin-left: auto;
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .lex-search {
      display: flex;
      align-items: center;
      gap: 10px;
      background: #f1f5f9;
      border: 1px solid transparent;
      border-radius: 999px;
      padding: 9px 18px;
      width: 230px;
      transition: var(--transition);
    }
    .lex-search:focus-within {
      background: #fff;
      border-color: var(--primary-light);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
    }
    .lex-search i { color: var(--text-light); font-size: 14px; }
    .lex-search input {
      width: 100%;
      border: none;
      background: transparent;
      font-size: 14px;
      color: var(--text);
    }
    .lex-search input::placeholder { color: var(--text-light); }
    .lex-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 26px;
      border-radius: 999px;
      font-weight: 700;
      font-size: 14px;
      transition: var(--transition);
      line-height: 1;
      white-space: nowrap;
    }
    .lex-btn-primary {
      background: linear-gradient(135deg, var(--primary), #4f68f8);
      color: #fff;
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
    }
    .lex-btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
    }
    .lex-btn-light {
      background: #fff;
      color: var(--dark);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    }
    .lex-btn-light:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
    }
    .lex-btn-outline-light {
      border: 2px solid rgba(255, 255, 255, 0.7);
      color: #fff;
    }
    .lex-btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
    }
    .lex-btn-ghost {
      background: #fff;
      border: 1px solid var(--border);
      color: var(--text);
    }
    .lex-btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .lex-menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: #f1f5f9;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
      margin-left: auto;
    }
    .lex-menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      background: var(--dark);
      border-radius: 2px;
      transition: var(--transition);
    }
    .lex-menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .lex-menu-toggle.active span:nth-child(2) { opacity: 0; }
    .lex-menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    /* ========== Banner ========== */
    .cat-banner {
      position: relative;
      background-size: cover;
      background-position: center;
      padding: 110px 0 90px;
      overflow: hidden;
    }
    .cat-banner-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 0%, rgba(37, 99, 235, 0.55) 55%, rgba(37, 99, 235, 0.3) 100%);
    }
    .cat-banner-content {
      position: relative;
      z-index: 2;
      max-width: 720px;
    }
    .cat-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.16);
      border: 1px solid rgba(255, 255, 255, 0.24);
      backdrop-filter: blur(8px);
      color: #fff;
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.5px;
      margin-bottom: 22px;
    }
    .cat-banner h1 {
      color: #fff;
      font-size: 52px;
      font-weight: 800;
      margin-bottom: 18px;
      letter-spacing: 1px;
      line-height: 1.2;
    }
    .cat-banner p {
      color: rgba(255, 255, 255, 0.9);
      font-size: 17px;
      line-height: 1.8;
      margin-bottom: 34px;
      max-width: 600px;
    }
    .cat-banner-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      padding-bottom: 12px;
    }

    /* ========== Section 通用 ========== */
    .section {
      padding: 90px 0;
    }
    .section-label {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--primary);
      background: var(--primary-50);
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 54px;
    }
    .section-header h2 {
      font-size: 36px;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--dark);
    }
    .section-header p {
      color: var(--text-weak);
      font-size: 16px;
    }

    /* ========== 分类概览 ========== */
    .section-overview {
      background: var(--card-bg);
      border-bottom: 1px solid var(--border);
    }
    .overview-left h2 {
      font-size: 30px;
      margin-bottom: 16px;
    }
    .overview-left p {
      color: var(--text-weak);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .overview-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 8px 0;
      color: var(--dark-800);
      font-weight: 500;
    }
    .overview-list li i {
      color: var(--accent);
      font-size: 18px;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding: 10px;
    }
    .tag {
      display: inline-block;
      padding: 10px 20px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      color: var(--dark-800);
      transition: var(--transition);
      cursor: default;
    }
    .tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-50);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    /* ========== 步骤 ========== */
    .section-steps {
      background: var(--bg);
    }
    .step-grid { margin-top: 10px; }
    .step-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px 26px;
      position: relative;
      height: 100%;
      transition: var(--transition);
      overflow: hidden;
    }
    .step-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      opacity: 0;
      transition: var(--transition);
    }
    .step-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: transparent;
    }
    .step-card:hover::before { opacity: 1; }
    .step-num {
      font-size: 44px;
      font-weight: 800;
      color: var(--primary-50);
      line-height: 1;
      margin-bottom: 16px;
      font-family: 'SF Mono', 'Consolas', monospace;
    }
    .step-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--primary-50);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 18px;
    }
    .step-card h3 {
      font-size: 18px;
      margin-bottom: 10px;
    }
    .step-card p {
      color: var(--text-weak);
      font-size: 14px;
      line-height: 1.7;
    }

    /* ========== 安全中心 ========== */
    .section-security {
      padding: 0;
    }
    .security-inner {
      position: relative;
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-lg);
      overflow: hidden;
      padding: 80px 0;
      margin: 90px 0 70px;
    }
    .security-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(37, 99, 235, 0.7) 100%);
    }
    .security-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 1000px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .security-content .section-label {
      background: rgba(255, 255, 255, 0.15);
      color: #fff;
    }
    .security-content h2 {
      color: #fff;
      font-size: 32px;
      margin-bottom: 10px;
    }
    .security-content > p {
      color: rgba(255, 255, 255, 0.8);
      margin-bottom: 40px;
    }
    .security-grid { margin-top: 0; }
    .security-card {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.14);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      height: 100%;
      transition: var(--transition);
    }
    .security-card:hover {
      background: rgba(255, 255, 255, 0.18);
      transform: translateY(-4px);
    }
    .security-card i {
      font-size: 26px;
      color: #fff;
      margin-bottom: 14px;
      display: block;
    }
    .security-card h3 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 8px;
    }
    .security-card p {
      color: rgba(255, 255, 255, 0.75);
      font-size: 13px;
      line-height: 1.6;
    }

    /* ========== FAQ ========== */
    .section-faq {
      background: var(--bg);
    }
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: var(--primary-light);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      width: 100%;
      padding: 24px 28px;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--dark);
      transition: var(--transition);
    }
    .faq-question i {
      color: var(--text-light);
      transition: var(--transition);
      flex-shrink: 0;
    }
    .faq-item.open .faq-question i {
      transform: rotate(180deg);
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }
    .faq-answer p {
      padding: 0 28px 24px;
      color: var(--text-weak);
      font-size: 15px;
      line-height: 1.75;
    }

    /* ========== 推荐内容 ========== */
    .section-cards {
      background: var(--card-bg);
      border-top: 1px solid var(--border);
    }
    .article-card {
      display: block;
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 100%;
      transition: var(--transition);
    }
    .article-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: transparent;
    }
    .article-cover {
      position: relative;
      height: 200px;
      overflow: hidden;
    }
    .article-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .article-card:hover .article-cover img {
      transform: scale(1.05);
    }
    .article-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(6px);
      color: var(--dark);
      font-size: 12px;
      font-weight: 700;
      padding: 5px 14px;
      border-radius: 999px;
    }
    .article-body {
      padding: 24px;
    }
    .article-body h3 {
      font-size: 17px;
      margin-bottom: 10px;
      line-height: 1.5;
    }
    .article-body p {
      color: var(--text-weak);
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .article-meta {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-light);
      font-size: 13px;
    }
    .article-meta i { font-size: 12px; }

    /* ========== CTA ========== */
    .section-cta {
      background: var(--bg);
      padding: 70px 0 90px;
    }
    .cta-inner {
      background: linear-gradient(135deg, #1e293b, #0f172a);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-inner::before {
      content: '';
      position: absolute;
      top: -60%;
      right: -20%;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(37, 99, 235, 0.35), transparent 70%);
    }
    .cta-inner h2 {
      color: #fff;
      font-size: 30px;
      margin-bottom: 14px;
      position: relative;
      z-index: 2;
    }
    .cta-inner p {
      color: rgba(255, 255, 255, 0.75);
      margin-bottom: 30px;
      position: relative;
      z-index: 2;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      position: relative;
      z-index: 2;
    }

    /* ========== Footer ========== */
    .lex-footer {
      background: #0b1120;
      color: #94a3b8;
      padding: 70px 0 36px;
    }
    .lex-footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 44px;
    }
    .lex-footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }
    .lex-footer-brand-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), #4f68f8);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 15px;
    }
    .lex-footer-desc {
      font-size: 14px;
      line-height: 1.7;
      max-width: 340px;
    }
    .lex-footer h4 {
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .lex-footer-links {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .lex-footer-links a {
      color: #94a3b8;
      font-size: 14px;
      transition: var(--transition);
    }
    .lex-footer-links a:hover {
      color: #fff;
      padding-left: 4px;
    }
    .lex-footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 30px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* ========== 响应式 ========== */
    @media screen and (max-width: 1024px) {
      .lex-search { display: none; }
      .cat-banner h1 { font-size: 42px; }
    }
    @media screen and (max-width: 768px) {
      .lex-header-inner { min-height: 64px; flex-wrap: wrap; gap: 0; }
      .lex-menu-toggle { display: flex; }
      .lex-header-actions { display: none; }
      .lex-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 18px;
        gap: 6px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        margin-left: 0;
      }
      .lex-nav.open { display: flex; }
      .lex-nav-link { width: 100%; text-align: center; }
      .cat-banner { padding: 80px 0 60px; }
      .cat-banner h1 { font-size: 32px; }
      .cat-banner p { font-size: 15px; }
      .section { padding: 60px 0; }
      .section-header h2 { font-size: 26px; }
      .overview-left h2 { font-size: 24px; }
      .security-inner { margin: 60px 0 40px; padding: 60px 0; }
      .security-content h2 { font-size: 26px; }
      .cta-inner { padding: 40px 24px; }
      .cta-inner h2 { font-size: 24px; }
      .lex-footer-grid { grid-template-columns: 1fr; gap: 32px; }
    }
    @media screen and (max-width: 520px) {
      .cat-banner h1 { font-size: 26px; }
      .cat-banner-actions .lex-btn { width: 100%; }
      .step-card { padding: 22px 18px; }
      .faq-question { padding: 18px 16px; font-size: 15px; }
      .faq-answer p { padding: 0 16px 18px; }
      .article-body { padding: 18px; }
      .lex-footer { padding: 50px 0 24px; }
      .lex-logo-text { font-size: 17px; }
      .lex-logo-icon { width: 34px; height: 34px; font-size: 15px; }
    }

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #0ea5e9;
            --accent-light: #e0f2fe;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #0f172a;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
            --space-section: 96px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        /* ========== 容器 ========== */
        .lex-container,
        .grid-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 头部导航 ========== */
        .lex-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(15, 23, 42, 0.03);
        }
        .lex-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 16px 24px;
            max-width: 1260px;
            margin: 0 auto;
        }
        .lex-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .lex-logo:hover {
            color: var(--text);
        }
        .lex-logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }
        .lex-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .lex-nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: all 0.2s ease;
        }
        .lex-nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .lex-nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .lex-header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .lex-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 16px;
            color: var(--text-weak);
            transition: all 0.25s ease;
        }
        .lex-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            background: #fff;
        }
        .lex-search input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 0.9rem;
            color: var(--text);
            width: 150px;
        }
        .lex-search input::placeholder {
            color: var(--text-weak);
        }
        .lex-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 600;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all 0.25s ease;
            line-height: 1.2;
        }
        .lex-btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
        }
        .lex-btn-primary:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
        }
        .lex-btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }
        .lex-btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .lex-btn-light {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            backdrop-filter: blur(6px);
        }
        .lex-btn-light:hover {
            background: rgba(255, 255, 255, 0.28);
            color: #fff;
        }
        .lex-menu-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            font-size: 18px;
            color: var(--text);
            cursor: pointer;
            transition: background 0.2s;
        }
        .lex-menu-toggle:hover {
            background: var(--bg);
        }

        /* ========== 文章 Banner ========== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(37, 99, 235, 0.72)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
        }
        .article-hero::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to bottom, transparent, var(--bg));
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 18px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            opacity: 0.6;
        }
        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            max-width: 820px;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.85);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .article-meta i {
            opacity: 0.8;
        }
        .article-meta .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(6px);
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* ========== 正文板块 ========== */
        .article-section {
            padding: 60px 0 20px;
            position: relative;
            z-index: 1;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
            align-items: start;
        }
        .article-main {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin: 28px 0 16px;
            font-weight: 700;
            line-height: 1.4;
        }
        .article-content h2 {
            font-size: 1.5rem;
            border-left: 4px solid var(--primary);
            padding-left: 14px;
        }
        .article-content h3 {
            font-size: 1.2rem;
        }
        .article-content p {
            margin-bottom: 16px;
        }
        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
            font-style: normal;
            color: #075985;
        }
        .article-content img {
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
            margin: 20px 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        .article-content th,
        .article-content td {
            padding: 12px 14px;
            border: 1px solid var(--border);
            text-align: left;
        }
        .article-content th {
            background: var(--bg);
            font-weight: 600;
        }

        /* 未找到 */
        .not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found i {
            font-size: 3.2rem;
            color: var(--border);
            margin-bottom: 16px;
        }
        .not-found h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .not-found p {
            color: var(--text-weak);
            margin-bottom: 24px;
        }

        /* ========== 侧边栏 ========== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 100px;
        }
        .sidebar-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            border: 1px solid rgba(226, 232, 240, 0.7);
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i {
            color: var(--primary);
        }
        .sidebar-info-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.92rem;
            color: var(--text);
        }
        .sidebar-info-list li:last-child {
            border-bottom: none;
        }
        .sidebar-info-list i {
            color: var(--primary);
            margin-top: 4px;
            width: 16px;
            text-align: center;
        }
        .sidebar-safe {
            background: linear-gradient(135deg, #ecfdf5, #f0fdf4);
            border-color: #bbf7d0;
        }
        .sidebar-safe h3 {
            color: #15803d;
        }
        .sidebar-safe h3 i {
            color: #16a34a;
        }
        .sidebar-safe p {
            font-size: 0.92rem;
            color: #166534;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .sidebar-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text);
            transition: all 0.2s ease;
        }
        .sidebar-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
            transform: translateX(4px);
        }
        .sidebar-links a i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            padding: 70px 0;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
        }
        .section-head p {
            color: var(--text-weak);
            max-width: 560px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card-img {
            position: relative;
            height: 180px;
            overflow: hidden;
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-card-img img {
            transform: scale(1.05);
        }
        .related-card-img::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 50px;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.25), transparent);
        }
        .related-card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .related-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 999px;
            align-self: flex-start;
        }
        .related-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            margin: 0;
        }
        .related-card-body h3 a {
            color: var(--text);
        }
        .related-card-body h3 a:hover {
            color: var(--primary);
        }
        .related-card-body p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.6;
            margin: 0;
            flex: 1;
        }
        .related-card-body a.more {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ========== 操作指南 ========== */
        .guide-section {
            padding: 80px 0;
            background: linear-gradient(180deg, var(--bg), #f1f5f9);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 48px;
        }
        .guide-step {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 32px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            position: relative;
            transition: all 0.3s ease;
        }
        .guide-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--primary);
        }
        .guide-step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
        }
        .guide-step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .guide-step p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.65;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 80px 0;
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 22px 28px;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-q {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            user-select: none;
        }
        .faq-q i {
            color: var(--primary);
            width: 20px;
            text-align: center;
        }
        .faq-a {
            display: none;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px dashed var(--border);
            font-size: 0.93rem;
            color: var(--text-weak);
            line-height: 1.75;
        }
        .faq-item.active .faq-a {
            display: block;
        }
        .faq-item .faq-toggle {
            margin-left: auto;
            color: var(--text-weak);
            font-size: 14px;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 90px 0;
            background: linear-gradient(135deg, #0f172a, #1e3a8a, #0ea5e9);
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.15;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
        }
        .cta-inner h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .cta-inner p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== 页脚 ========== */
        .lex-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.8);
            padding: 70px 0 30px;
        }
        .lex-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .lex-footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .lex-footer-brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 18px;
        }
        .lex-footer-desc {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 360px;
            margin-bottom: 0;
        }
        .lex-footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .lex-footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .lex-footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            transition: all 0.2s ease;
        }
        .lex-footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .lex-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .lex-footer-bottom p {
            margin: 0;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card {
                flex: 1 1 220px;
            }
            .article-hero h1 {
                font-size: 2rem;
            }
            .lex-header-actions .lex-search {
                display: none;
            }
        }
        @media (max-width: 768px) {
            :root {
                --space-section: 64px;
            }
            .lex-header-inner {
                padding: 12px 20px;
            }
            .lex-nav {
                display: none;
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
                border-bottom: 1px solid var(--border);
                border-radius: 0 0 20px 20px;
                z-index: 99;
            }
            .lex-nav.open {
                display: flex;
            }
            .lex-nav-link {
                padding: 14px 16px;
                font-size: 1rem;
                border-radius: 12px;
            }
            .lex-menu-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .lex-header-actions .lex-btn {
                display: none;
            }
            .article-hero {
                padding: 50px 0 40px;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-main {
                padding: 28px 22px;
            }
            .article-layout {
                gap: 24px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .lex-footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                margin-bottom: 24px;
            }
            .cta-inner h2 {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 520px) {
            .lex-container,
            .grid-container {
                padding: 0 16px;
            }
            .lex-logo {
                font-size: 1.1rem;
            }
            .lex-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-meta {
                gap: 10px;
                font-size: 0.85rem;
            }
            .cta-btns {
                flex-direction: column;
                align-items: center;
            }
            .cta-btns .lex-btn {
                width: 100%;
                max-width: 280px;
            }
        }