/* roulang page: index */
:root {
  --color-primary: #1E6FD9;
  --color-primary-light: #EFF6FF;
  --color-accent: #D9A23A;
  --color-bg: #F4F8FC;
  --color-surface: #FFFFFF;
  --color-border: #E2E8F0;
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --shadow-card: 0 8px 24px rgba(30,111,217,0.06);
  --shadow-card-hover: 0 12px 32px rgba(30,111,217,0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  background: var(--color-bg);
  color: var(--color-text);
  margin: 0;
  padding: 0;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* 左侧导航 */
.app-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 240px;
  height: 100vh;
  background: #fff;
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: 50;
  transition: transform .3s ease;
}
.sidebar-logo {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
  border-bottom: 1px solid var(--color-border);
}
.logo-dot {
  width: 10px; height: 10px;
  background: var(--color-primary);
  border-radius: 9999px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}
.sidebar-nav {
  flex: 1;
  padding: 24px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 0.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  transition: all .2s ease;
  position: relative;
}
.nav-item i {
  width: 18px;
  font-size: 1rem;
  text-align: center;
}
.nav-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}
.nav-item.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 22px;
  background: var(--color-primary);
  border-radius: 0 4px 4px 0;
}
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: #94A3B8;
}

/* 移动端顶部栏 */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 60;
}
.mobile-topbar .logo-text { font-size: 1rem; }
.mobile-burger {
  width: 40px; height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  cursor: pointer;
  transition: all .2s ease;
}
.mobile-burger:hover { background: var(--color-primary-light); color: var(--color-primary); }

/* 抽屉 */
.drawer {
  position: fixed;
  top: 0; left: 0;
  width: 280px;
  height: 100vh;
  background: #fff;
  z-index: 70;
  transform: translateX(-100%);
  transition: transform .3s ease;
  display: flex;
  flex-direction: column;
}
.drawer.open { transform: translateX(0); }
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.4);
  z-index: 65;
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
}
.drawer-overlay.open { opacity: 1; visibility: visible; }

/* 主内容 */
.main-content {
  margin-left: 240px;
  min-height: 100vh;
}
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Hero */
.hero {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg) 100%);
  padding: 72px 0 72px;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 6px 16px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}
.hero-tag::before {
  content: '';
  width: 14px; height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}
.hero h1 {
  font-size: 2.75rem;
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}
.hero .hero-sub {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 0.5rem;
  padding: 12px 24px;
  cursor: pointer;
  transition: all .2s ease;
  border: none;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(30,111,217,0.18);
}
.btn-primary:hover { background: #155BB8; transform: translateY(-1px); }
.btn-primary:focus, .btn-outline:focus { outline: none; box-shadow: 0 0 0 3px rgba(30,111,217,0.3); }
.btn-outline {
  background: #fff;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary-light); }
.hero-image {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  min-height: 320px;
  position: relative;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
}

/* 板块通用 */
.section { padding: 96px 0; }
.section-head { margin-bottom: 48px; max-width: 640px; }
.section-head .eyebrow {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 9999px;
  padding: 4px 14px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: 1.875rem;
  line-height: 1.3;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}
.section-head p {
  color: var(--color-text-secondary);
  margin-top: 16px;
  font-size: 1rem;
}

/* 卖点区 */
.features { background: #fff; }
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 32px;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.feature-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.feature-num {
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--color-primary-light);
  line-height: 1;
  margin-bottom: 20px;
  display: block;
}
.feature-icon {
  width: 48px; height: 48px;
  background: var(--color-primary-light);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 10px;
}
.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin: 0;
}

/* 演示区 */
.demo { background: var(--color-bg); }
.demo-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.demo-text h2 {
  font-size: 1.875rem;
  line-height: 1.3;
  font-weight: 600;
  margin: 0 0 20px;
}
.demo-text p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  font-size: 1rem;
}
.demo-tagline {
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 16px 20px;
  font-size: 0.875rem;
  color: var(--color-text);
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.demo-tagline i { color: var(--color-primary); font-size: 1.125rem; }
.demo-image {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}
.demo-image img { width: 100%; height: 100%; object-fit: cover; min-height: 300px; }
.demo-inline {
  position: absolute;
  bottom: 16px; left: 16px; right: 16px;
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--color-text);
}

/* 证据区 */
.evidence { background: #fff; }
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 48px;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 6px;
}
.testimonials-wrap {
  position: relative;
}
.testimonials-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding-bottom: 16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.testimonials-track::-webkit-scrollbar { height: 6px; }
.testimonials-track::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 3px; }
.testi-card {
  min-width: 320px;
  max-width: 380px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 28px;
  scroll-snap-align: start;
  flex-shrink: 0;
  transition: all .25s ease;
}
.testi-card:hover { border-color: var(--color-primary); }
.testi-card .quote {
  font-size: 2rem;
  color: var(--color-primary);
  opacity: .25;
  line-height: 1;
}
.testi-card .content { font-size: 0.9375rem; color: var(--color-text-secondary); margin: 12px 0 20px; line-height: 1.75; }
.testi-card .author { font-size: 0.875rem; font-weight: 600; color: var(--color-text); }
.testi-card .author-role { font-size: 0.8125rem; color: #94A3B8; }

/* 价格区 */
.pricing { background: var(--color-bg); }
.price-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
}
.price-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 36px;
  transition: all .3s ease;
  position: relative;
}
.price-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.price-card.recommended {
  border: 2px solid var(--color-primary);
}
.price-badge {
  position: absolute;
  top: -14px;
  left: 32px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  padding: 4px 16px;
}
.price-card .plan-name { font-size: 1.125rem; font-weight: 600; margin-bottom: 8px; }
.price-card .price-text {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 24px;
}
.price-card .price-desc { font-size: 0.875rem; color: var(--color-text-secondary); margin-bottom: 24px; }
.price-list { margin-bottom: 32px; }
.price-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--color-text);
  border-bottom: 1px dashed var(--color-border);
}
.price-list li:last-child { border-bottom: none; }
.price-list i { color: var(--color-primary); font-size: 0.875rem; }

/* 资讯区 */
.news { background: #fff; }
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 24px 28px;
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.news-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
  border-color: #CBD5E1;
}
.news-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.news-badge {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 9999px;
  padding: 4px 12px;
}
.news-time { font-size: 0.8125rem; color: #94A3B8; }
.news-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}
.news-title a:hover { color: var(--color-primary); }
.news-summary {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-link {
  font-size: 0.875rem;
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-link:hover { gap: 10px; }
.empty-state {
  border: 2px dashed var(--color-border);
  border-radius: 1rem;
  padding: 48px;
  text-align: center;
  color: #94A3B8;
  font-size: 0.9375rem;
  background: #F8FAFC;
}

/* FAQ */
.faq { background: var(--color-bg); }
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: all .25s ease;
}
.faq-item.open { border-color: var(--color-primary); box-shadow: var(--shadow-card); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: background .2s ease;
}
.faq-question:hover { background: var(--color-primary-light); }
.faq-icon {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 9999px;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-primary);
  transition: all .25s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); color: var(--color-primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  border-left: 2px solid var(--color-primary);
  margin-left: 24px;
  margin-right: 16px;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* CTA */
.cta-section {
  background: var(--color-primary);
  padding: 72px 0;
  text-align: center;
}
.cta-section h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-section p {
  color: rgba(255,255,255,0.85);
  font-size: 1.0625rem;
  margin-bottom: 32px;
}
.cta-section .btn {
  background: #fff;
  color: var(--color-primary);
  font-size: 1rem;
  padding: 14px 36px;
}
.cta-section .btn:hover { background: #EFF6FF; transform: translateY(-2px); }
.cta-section .btn:focus { box-shadow: 0 0 0 3px rgba(255,255,255,0.4); }

/* 页脚 */
.site-footer {
  background: #0F172A;
  padding: 48px 0 32px;
}
.site-footer .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand .dot {
  width: 8px; height: 8px;
  background: var(--color-primary);
  border-radius: 9999px;
  display: inline-block;
  margin-right: 8px;
}
.footer-desc {
  color: #94A3B8;
  font-size: 0.875rem;
  max-width: 360px;
  line-height: 1.7;
}
.footer-links h4 {
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.footer-links ul { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: #94A3B8; font-size: 0.875rem; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  color: #64748B;
  font-size: 0.8125rem;
}

/* 浮动CTA */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 0.75rem;
  padding: 14px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(30,111,217,0.35);
  z-index: 40;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
  border: none;
}
.float-cta.visible { opacity: 1; visibility: visible; }
.float-cta:hover { background: #155BB8; transform: translateY(-2px); }

/* 响应式 */
@media (max-width: 1023px) {
  .app-sidebar { width: 200px; }
  .main-content { margin-left: 200px; }
  .container { padding: 0 24px; }
  .hero { padding: 56px 0; }
  .hero h1 { font-size: 2.25rem; }
  .section { padding: 72px 0; }
  .demo-block { gap: 32px; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
}
@media (max-width: 767px) {
  .app-sidebar { transform: translateX(-100%); width: 260px; box-shadow: 4px 0 20px rgba(15,23,42,0.08); }
  .app-sidebar.open { transform: translateX(0); }
  .mobile-topbar { display: flex; }
  .main-content { margin-left: 0; padding-top: 56px; }
  .container { padding: 0 20px; }
  .hero { padding: 40px 0 56px; }
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 2rem; }
  .hero-sub { font-size: 1rem; }
  .section { padding: 64px 0; }
  .features-grid { grid-template-columns: 1fr; }
  .demo-block { grid-template-columns: 1fr; }
  .demo-text { margin-bottom: 24px; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .price-grid { grid-template-columns: 1fr; }
  .testi-card { min-width: 260px; }
  .site-footer .container { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
  .float-cta {
    left: 16px;
    right: 16px;
    bottom: 16px;
    justify-content: center;
    border-radius: 0.75rem;
    padding: 14px 16px;
  }
}

/* 细节 */
.fade-in { animation: fadeIn .5s ease both; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* roulang page: article */
:root {
            --color-primary: #1E6FD9;
            --color-primary-light: #EFF6FF;
            --color-accent: #D9A23A;
            --color-bg: #F4F8FC;
            --color-surface: #FFFFFF;
            --color-border: #E2E8F0;
            --color-text: #1E293B;
            --color-text-secondary: #64748B;
            --shadow-card: 0 8px 24px rgba(30,111,217,0.06);
            --shadow-card-hover: 0 12px 32px rgba(30,111,217,0.12);
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        button {
            font-family: inherit;
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: 240px;
            background: var(--color-surface);
            border-right: 1px solid var(--color-border);
            z-index: 50;
            display: flex;
            flex-direction: column;
            padding: 0 16px;
        }

        .sidebar-logo {
            height: 64px;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 8px;
            border-bottom: 1px solid var(--color-border);
            font-weight: 700;
            font-size: 1.0625rem;
            color: var(--color-text);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .sidebar-logo .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-primary);
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            border-radius: 0.5rem;
            color: var(--color-text-secondary);
            font-size: 0.9375rem;
            font-weight: 500;
            transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
            border-left: 2px solid transparent;
        }

        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            flex-shrink: 0;
        }

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

        .nav-item:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 0.5rem;
        }

        .nav-item.active {
            background: var(--color-primary-light);
            color: var(--color-primary);
            border-left-color: var(--color-primary);
            font-weight: 600;
        }

        .sidebar-footer {
            padding: 16px 8px;
            border-top: 1px solid var(--color-border);
            font-size: 0.75rem;
            color: #94A3B8;
            flex-shrink: 0;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
        }

        .mobile-drawer,
        .drawer-overlay {
            display: none;
        }

        /* ===== 主内容 ===== */
        .main-content {
            margin-left: 240px;
            padding: 32px;
            max-width: 1120px;
            min-height: calc(100vh - 200px);
        }

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-primary);
            transition: color 0.2s;
        }

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

        .breadcrumb .sep {
            color: var(--color-border);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--color-text);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 300px;
        }

        /* 文章卡片 */
        .article-card {
            background: var(--color-surface);
            border-radius: 1rem;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 48px 56px;
            margin-bottom: 32px;
            transition: box-shadow 0.25s ease;
        }

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

        .article-title {
            font-size: 2.25rem;
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 32px;
            font-size: 0.875rem;
            color: var(--color-text-secondary);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--color-primary);
            font-size: 0.8125rem;
        }

        /* 正文排版 */
        .article-content {
            max-width: 720px;
            margin: 0 auto;
            font-size: 1rem;
            line-height: 1.75;
            color: var(--color-text);
        }

        .article-content p {
            margin-bottom: 16px;
        }

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

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 16px;
            line-height: 1.4;
            color: var(--color-text);
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 12px;
            line-height: 1.5;
            color: var(--color-text);
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 16px;
            padding-left: 24px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
        }

        .article-content ul li::marker {
            color: var(--color-primary);
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-primary-light);
            padding: 16px 20px;
            border-radius: 0 0.5rem 0.5rem 0;
            margin: 24px 0;
            color: var(--color-text-secondary);
            font-style: italic;
        }

        .article-content img {
            border-radius: 0.75rem;
            margin: 24px 0;
            max-width: 100%;
            height: auto;
            object-fit: cover;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 0.9375rem;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--color-border);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content table th {
            background: var(--color-primary-light);
            font-weight: 600;
            color: var(--color-text);
        }

        .article-content a {
            color: var(--color-primary);
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s;
        }

        .article-content a:hover {
            border-bottom-color: var(--color-primary);
        }

        .article-content code {
            background: var(--color-bg);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.875em;
        }

        .article-content pre {
            background: #0F172A;
            color: #E2E8F0;
            padding: 20px 24px;
            border-radius: 0.75rem;
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.875rem;
            line-height: 1.6;
        }

        /* 相关推荐 */
        .related-section {
            margin-bottom: 32px;
        }

        .related-section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .related-section-header h2 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--color-text);
        }

        .related-section-header .line {
            flex: 1;
            height: 1px;
            background: var(--color-border);
            margin-left: 24px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            grid-template-rows: auto auto;
            gap: 24px;
        }

        .related-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
            display: block;
        }

        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-primary);
        }

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--color-bg);
        }

        .related-card.related-large {
            grid-row: 1 / 3;
        }

        .related-card.related-large img {
            height: 100%;
            min-height: 280px;
        }

        .related-info {
            padding: 20px 24px;
        }

        .related-info .badge {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 9999px;
            margin-bottom: 12px;
        }

        .related-info h3 {
            font-size: 1.125rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            color: var(--color-text);
            transition: color 0.2s;
        }

        .related-card:hover .related-info h3 {
            color: var(--color-primary);
        }

        .related-info p {
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .related-date {
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .related-date i {
            color: var(--color-primary);
            font-size: 0.75rem;
        }

        .empty-text {
            background: var(--color-surface);
            border: 1px dashed var(--color-border);
            border-radius: 1rem;
            padding: 48px 24px;
            text-align: center;
            color: var(--color-text-secondary);
            font-size: 0.9375rem;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 0.5rem;
            font-size: 0.9375rem;
            font-weight: 500;
            transition: all 0.2s ease;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(30,111,217,0.15);
        }

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

        .btn-primary:hover {
            background: #1557B0;
        }

        .btn-outline {
            background: var(--color-surface);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn-outline:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary);
        }

        /* 文章操作 */
        .article-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            padding: 24px 0;
            border-top: 1px solid var(--color-border);
            margin-top: 8px;
        }

        /* 未找到 */
        .not-found-card {
            background: var(--color-surface);
            border: 1px dashed var(--color-border);
            border-radius: 1rem;
            padding: 64px 32px;
            text-align: center;
            color: var(--color-text-secondary);
        }

        .not-found-card i {
            font-size: 3rem;
            color: #CBD5E1;
            margin-bottom: 16px;
        }

        .not-found-card h2 {
            font-size: 1.5rem;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .not-found-card p {
            margin-bottom: 24px;
            font-size: 0.9375rem;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 48px 0 24px;
            margin-left: 240px;
        }

        .site-footer .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .footer-brand {
            font-size: 1.125rem;
            font-weight: 600;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
        }

        .footer-brand .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-primary);
            flex-shrink: 0;
        }

        .footer-desc {
            font-size: 0.875rem;
            max-width: 360px;
            line-height: 1.6;
            margin: 0;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 0.875rem;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links ul li {
            margin-bottom: 8px;
        }

        .footer-links ul li a {
            color: #94A3B8;
            font-size: 0.875rem;
            transition: color 0.2s;
        }

        .footer-links ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            max-width: 1120px;
            margin: 32px auto 0;
            padding: 24px 32px 0;
            border-top: 1px solid rgba(255,255,255,0.08);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.8125rem;
            color: #64748B;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .sidebar {
                width: 200px;
            }
            .main-content {
                margin-left: 200px;
                padding: 24px;
            }
            .site-footer {
                margin-left: 200px;
            }
            .article-card {
                padding: 32px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                display: none;
            }
            .main-content {
                margin-left: 0;
                padding: 20px;
            }
            .site-footer {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                height: 56px;
                background: var(--color-surface);
                border-bottom: 1px solid var(--color-border);
                padding: 0 20px;
                position: sticky;
                top: 0;
                z-index: 40;
            }

            .mobile-logo {
                font-weight: 700;
                font-size: 1rem;
                display: flex;
                align-items: center;
                gap: 8px;
                color: var(--color-text);
            }

            .mobile-logo .dot {
                width: 8px;
                height: 8px;
                border-radius: 50%;
                background: var(--color-primary);
            }

            .mobile-toggle {
                background: none;
                border: none;
                font-size: 1.25rem;
                color: var(--color-text);
                cursor: pointer;
                padding: 8px;
                border-radius: 0.375rem;
                transition: background 0.2s;
            }

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

            .mobile-drawer {
                position: fixed;
                left: 0;
                top: 0;
                bottom: 0;
                width: 260px;
                background: var(--color-surface);
                border-right: 1px solid var(--color-border);
                z-index: 60;
                transform: translateX(-100%);
                transition: transform 0.3s ease;
                display: flex;
                flex-direction: column;
                padding: 16px;
            }

            .mobile-drawer.open {
                transform: translateX(0);
            }

            .mobile-drawer .drawer-logo {
                height: 56px;
                display: flex;
                align-items: center;
                gap: 10px;
                font-weight: 700;
                font-size: 1rem;
                color: var(--color-text);
                border-bottom: 1px solid var(--color-border);
                margin-bottom: 16px;
            }

            .mobile-drawer .drawer-logo .dot {
                width: 8px;
                height: 8px;
                border-radius: 50%;
                background: var(--color-primary);
            }

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

            .drawer-footer {
                padding-top: 16px;
                border-top: 1px solid var(--color-border);
                font-size: 0.75rem;
                color: #94A3B8;
            }

            .drawer-overlay {
                position: fixed;
                inset: 0;
                background: rgba(15,23,42,0.4);
                z-index: 55;
                transition: opacity 0.3s ease;
            }

            .drawer-overlay.show {
                display: block;
            }

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

            .related-card.related-large {
                grid-row: auto;
            }

            .related-card.related-large img {
                min-height: 0;
                height: 180px;
            }

            .article-card {
                padding: 24px;
            }

            .article-title {
                font-size: 2rem;
            }

            .article-meta {
                gap: 12px;
                flex-direction: column;
                align-items: flex-start;
            }

            .breadcrumb .current {
                max-width: 160px;
            }

            .article-content {
                font-size: 0.9375rem;
            }

            .related-section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .related-section-header .line {
                display: none;
            }

            .site-footer .container {
                flex-direction: column;
                padding: 0 20px;
            }

            .footer-bottom {
                padding: 16px 20px 0;
                flex-direction: column;
                align-items: flex-start;
            }
        }

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

            .article-card {
                padding: 16px;
                border-radius: 0.75rem;
            }

            .article-title {
                font-size: 1.5rem;
                line-height: 1.35;
            }

            .article-meta {
                font-size: 0.8125rem;
                gap: 10px;
            }

            .article-actions {
                flex-direction: column;
                width: 100%;
            }

            .article-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .related-info {
                padding: 16px;
            }

            .related-info h3 {
                font-size: 1rem;
            }

            .breadcrumb {
                font-size: 0.8125rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1E6FD9;
            --color-primary-light: #EFF6FF;
            --color-accent: #D9A23A;
            --color-bg: #F4F8FC;
            --color-surface: #FFFFFF;
            --color-border: #E2E8F0;
            --color-text: #1E293B;
            --color-text-secondary: #64748B;
            --shadow-card: 0 8px 24px rgba(30, 111, 217, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(30, 111, 217, 0.12);
            --radius-card: 1rem;
            --radius-btn: 0.5rem;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--color-primary);
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 500;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius-btn);
            border: 2px solid var(--color-primary);
            transition: all 0.25s ease;
            letter-spacing: 0.02em;
        }
        .btn-primary:hover {
            background: #1557b0;
            border-color: #1557b0;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 111, 217, 0.25);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(30, 111, 217, 0.2);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--color-surface);
            color: var(--color-primary);
            font-size: 0.9375rem;
            font-weight: 500;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius-btn);
            border: 2px solid var(--color-primary);
            transition: all 0.25s ease;
            letter-spacing: 0.02em;
        }
        .btn-outline:hover {
            background: var(--color-primary-light);
            border-color: #1557b0;
            color: #1557b0;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(30, 111, 217, 0.12);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(30, 111, 217, 0.2);
        }

        /* ===== 桌面侧边导航 ===== */
        .app-sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: 240px;
            height: 100vh;
            background: #fff;
            border-right: 1px solid var(--color-border);
            z-index: 50;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
        }
        .sidebar-logo {
            height: 64px;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 20px;
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--color-text);
            border-bottom: 1px solid var(--color-border);
            flex-shrink: 0;
            letter-spacing: 0.01em;
        }
        .sidebar-logo .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-primary);
            display: inline-block;
            flex-shrink: 0;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0.65rem 1rem;
            border-radius: 0.5rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all 0.2s ease;
            position: relative;
            border-left: 3px solid transparent;
        }
        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 0.9375rem;
            color: var(--color-text-secondary);
            transition: color 0.2s ease;
        }
        .nav-item:hover {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .nav-item:hover i {
            color: var(--color-primary);
        }
        .nav-item.active {
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-weight: 600;
            border-left: 3px solid var(--color-primary);
        }
        .nav-item.active i {
            color: var(--color-primary);
        }
        .sidebar-copyright {
            padding: 16px 20px;
            border-top: 1px solid var(--color-border);
            font-size: 0.75rem;
            color: var(--color-text-secondary);
            text-align: center;
            flex-shrink: 0;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: 240px;
            min-height: 100vh;
        }

        /* ===== 移动端顶栏 ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 60;
            height: 56px;
            background: #fff;
            border-bottom: 1px solid var(--color-border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
        }
        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text);
        }
        .mobile-logo .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-primary);
        }
        .mobile-menu-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.5rem;
            color: var(--color-text);
            font-size: 1.125rem;
            transition: background 0.2s ease;
        }
        .mobile-menu-btn:hover {
            background: var(--color-bg);
        }

        /* ===== 移动端抽屉 ===== */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 70;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }
        .mobile-drawer {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: 280px;
            background: #fff;
            z-index: 80;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }
        .drawer-header {
            height: 56px;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 16px;
            border-bottom: 1px solid var(--color-border);
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text);
        }
        .drawer-header .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-primary);
        }
        .drawer-close {
            margin-left: auto;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.375rem;
            color: var(--color-text-secondary);
            font-size: 0.9375rem;
            transition: background 0.2s ease;
        }
        .drawer-close:hover {
            background: var(--color-bg);
        }
        .drawer-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .drawer-nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0.75rem 1rem;
            border-radius: 0.5rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all 0.2s ease;
            border-left: 3px solid transparent;
        }
        .drawer-nav-item i {
            width: 20px;
            text-align: center;
        }
        .drawer-nav-item:hover {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .drawer-nav-item.active {
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-weight: 600;
            border-left: 3px solid var(--color-primary);
        }
        .drawer-nav-item.active i {
            color: var(--color-primary);
        }

        /* ===== 分类页首屏 ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, #ffffff 0%, var(--color-bg) 100%);
            padding: 64px 0 72px;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }
        .category-hero .hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: 10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(30, 111, 217, 0.04);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .separator {
            color: #CBD5E1;
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 500;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.375rem 0.875rem;
            border-radius: 9999px;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-primary);
            display: inline-block;
        }
        .category-hero h1 {
            font-size: 2.75rem;
            line-height: 1.25;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 20px;
            letter-spacing: -0.01em;
            max-width: 720px;
        }
        .category-hero .hero-desc {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--color-text-secondary);
            max-width: 660px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--color-border);
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
        }

        /* ===== 通用 Section ===== */
        .section {
            padding: 88px 0;
            background: var(--color-surface);
        }
        .section-alt {
            background: var(--color-bg);
        }
        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 0.3125rem 0.875rem;
            border-radius: 9999px;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }
        .section-header h2 {
            font-size: 1.875rem;
            line-height: 1.3;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-header p {
            font-size: 0.9375rem;
            line-height: 1.75;
            color: var(--color-text-secondary);
            margin-top: 12px;
        }

        /* ===== 内容卡片网格（Bento） ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .guide-card.wide {
            grid-column: span 2;
        }
        .guide-card .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .guide-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .guide-card:hover .card-image img {
            transform: scale(1.04);
        }
        .guide-card .card-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.25), transparent 50%);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .guide-card:hover .card-image::after {
            opacity: 1;
        }
        .guide-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-tag {
            display: inline-flex;
            align-items: center;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            margin-bottom: 14px;
            align-self: flex-start;
        }
        .guide-card .card-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .guide-card .card-desc {
            font-size: 0.875rem;
            line-height: 1.7;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
            flex: 1;
        }
        .guide-card .card-link {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease;
        }
        .guide-card .card-link span {
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s ease;
        }
        .guide-card .card-link:hover span {
            border-bottom-color: var(--color-primary);
        }
        .guide-card .card-link:hover {
            gap: 10px;
        }

        /* ===== 核心特点 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .feature-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .feature-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: rgba(30, 111, 217, 0.2);
        }
        .feature-item .feature-num {
            font-size: 1.75rem;
            font-weight: 700;
            color: rgba(30, 111, 217, 0.12);
            line-height: 1;
            min-width: 42px;
        }
        .feature-item .feature-icon {
            width: 42px;
            height: 42px;
            border-radius: 0.75rem;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1.125rem;
            flex-shrink: 0;
        }
        .feature-item .feature-info {
            flex: 1;
        }
        .feature-item .feature-title {
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .feature-item .feature-desc {
            font-size: 0.875rem;
            line-height: 1.7;
            color: var(--color-text-secondary);
        }

        /* ===== 适用场景 ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .scenario-card .scenario-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1.375rem;
            flex-shrink: 0;
        }
        .scenario-card .scenario-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .scenario-card .scenario-desc {
            font-size: 0.875rem;
            line-height: 1.7;
            color: var(--color-text-secondary);
        }

        /* ===== 服务流程 ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 12.5%;
            right: 12.5%;
            height: 2px;
            background: var(--color-border);
            z-index: 0;
        }
        .process-step {
            position: relative;
            z-index: 1;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }
        .process-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .process-step .step-num {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 1.375rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 3px solid #fff;
            box-shadow: 0 0 0 1px rgba(30, 111, 217, 0.2);
        }
        .process-step .step-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .process-step .step-desc {
            font-size: 0.8125rem;
            line-height: 1.7;
            color: var(--color-text-secondary);
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-section .container {
            max-width: 840px;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all 0.25s ease;
            box-shadow: var(--shadow-card);
        }
        .faq-item:hover {
            border-color: rgba(30, 111, 217, 0.25);
        }
        .faq-item.open {
            border-color: rgba(30, 111, 217, 0.3);
            box-shadow: var(--shadow-card-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            text-align: left;
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--color-text);
            gap: 16px;
            transition: background 0.2s ease;
        }
        .faq-question:hover {
            background: var(--color-bg);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-secondary);
            font-size: 0.8125rem;
            transition: all 0.25s ease;
            background: var(--color-surface);
        }
        .faq-item.open .faq-icon {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            border-left: 2px solid var(--color-primary);
            margin-left: 24px;
            padding-left: 20px;
            margin-right: 24px;
            font-size: 0.875rem;
            line-height: 1.75;
            color: var(--color-text-secondary);
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: var(--color-primary);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
        }
        .cta-section h2 {
            font-size: 2rem;
            line-height: 1.3;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            font-size: 1rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            background: #fff;
            border-color: #fff;
            color: var(--color-primary);
        }
        .cta-section .btn-primary:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary-light);
            color: #1557b0;
        }
        .cta-section .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 56px 0 0;
            font-size: 0.875rem;
            line-height: 1.75;
        }
        .site-footer .container {
            display: flex;
            justify-content: space-between;
            gap: 48px;
            flex-wrap: wrap;
            padding-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.125rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--color-primary);
        }
        .footer-desc {
            font-size: 0.875rem;
            line-height: 1.75;
            max-width: 340px;
            color: #94A3B8;
        }
        .footer-links h4 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 0.875rem;
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.8125rem;
            color: #64748B;
        }

        /* ===== 浮动 CTA ===== */
        .float-cta {
            position: fixed;
            bottom: 28px;
            right: 28px;
            z-index: 45;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: all 0.35s ease;
        }
        .float-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .float-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--color-primary);
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 600;
            padding: 0.875rem 1.625rem;
            border-radius: 9999px;
            box-shadow: 0 8px 24px rgba(30, 111, 217, 0.35);
            transition: all 0.25s ease;
        }
        .float-cta-btn:hover {
            background: #1557b0;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(30, 111, 217, 0.4);
        }
        .float-cta-btn i {
            font-size: 0.875rem;
        }

        /* ===== 图片占位 ===== */
        .img-placeholder {
            background: linear-gradient(135deg, #E2E8F0, #F1F5F9);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-secondary);
            min-height: 160px;
            font-size: 0.8125rem;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .app-sidebar {
                width: 200px;
            }
            .main-content {
                margin-left: 200px;
            }
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-card.wide {
                grid-column: span 1;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-steps::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .app-sidebar {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .category-hero {
                padding: 40px 0 48px;
            }
            .category-hero h1 {
                font-size: 2rem;
                line-height: 1.3;
            }
            .category-hero .hero-desc {
                font-size: 0.9375rem;
            }
            .category-hero .hero-bg {
                width: 100%;
                opacity: 0.06;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .section {
                padding: 64px 0;
            }
            .section-header {
                margin-bottom: 40px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .guide-card.wide {
                grid-column: span 1;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.875rem;
            }
            .faq-answer-inner {
                margin-left: 18px;
                margin-right: 18px;
                padding-left: 14px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.625rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .float-cta {
                left: 0;
                right: 0;
                bottom: 0;
                transform: translateY(100%);
                background: var(--color-surface);
                padding: 12px 16px;
                box-shadow: 0 -4px 20px rgba(15, 23, 42, 0.1);
                border-radius: 0;
                border-top: 1px solid var(--color-border);
            }
            .float-cta.visible {
                transform: translateY(0);
            }
            .float-cta-btn {
                width: 100%;
                justify-content: center;
                border-radius: 0.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-stats {
                gap: 32px;
            }
            .hero-stat .num {
                font-size: 1.625rem;
            }
            .feature-item {
                padding: 24px;
                flex-direction: column;
            }
            .feature-item .feature-num {
                font-size: 1.375rem;
            }
            .scenario-card {
                padding: 24px;
                flex-direction: column;
            }
            .scenario-card .scenario-icon {
                width: 44px;
                height: 44px;
                font-size: 1.125rem;
            }
            .faq-question {
                padding: 14px 16px;
            }
        }