/* roulang page: index */
:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --secondary: #0EA5E9;
    --bg: #ffffff;
    --bg-soft: #F8FAFC;
    --text: #1E293B;
    --text-sub: #64748B;
    --border: #E2E8F0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 12px 24px rgba(0,0,0,0.08);
    --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { text-decoration: none; color: inherit; transition: color .2s ease, box-shadow .2s ease, border-color .2s ease; }
  button { font-family: inherit; cursor: pointer; }
  input { font-family: inherit; }

  .site-wrap { min-height: 100vh; }

  /* ===== 左侧导航 ===== */
  .side-nav {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 240px;
    background: #fff;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 32px 20px 24px;
    z-index: 40;
  }
  .logo-box {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 32px;
  }
  .logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: #fff;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
  }
  .logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: .5px;
  }
  .side-nav__menu {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  .side-nav__link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    transition: background .2s, color .2s;
  }
  .side-nav__link i {
    width: 20px;
    text-align: center;
    color: var(--text-sub);
    transition: color .2s;
  }
  .side-nav__link:hover {
    background: #F1F5F9;
  }
  .side-nav__link.active {
    background: rgba(59,130,246,.08);
    color: var(--primary-dark);
  }
  .side-nav__link.active i {
    color: var(--primary);
  }
  .side-nav__footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.8;
  }

  /* ===== 主内容区 ===== */
  .main-content {
    margin-left: 240px;
  }
  .container-th {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }
  .section {
    padding: 96px 0;
  }
  .section--alt {
    background: var(--bg-soft);
  }
  .section__head {
    max-width: 640px;
    margin: 0 auto 48px;
    text-align: center;
  }
  .section__head--row {
    max-width: 1200px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin: 0 auto 48px;
    text-align: left;
    gap: 24px;
  }
  .section__eyebrow {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 8px;
  }
  .section__head h2 {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text);
    margin: 0 0 12px;
  }
  .section__head p {
    font-size: 16px;
    color: var(--text-sub);
    line-height: 1.8;
    margin: 0;
  }

  /* ===== 按钮 ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    padding: 12px 24px;
    border: 1px solid transparent;
    transition: background .2s, box-shadow .2s, transform .2s, border-color .2s;
  }
  .btn--primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59,130,246,.25);
  }
  .btn--primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  .btn--primary:active {
    transform: translateY(0);
    filter: brightness(.96);
  }
  .btn--primary:focus-visible,
  .btn--text:focus-visible,
  .btn--dark:focus-visible {
    outline: 2px solid rgba(59,130,246,.3);
    outline-offset: 2px;
  }
  .btn--text {
    color: var(--primary);
    padding: 12px 4px;
    font-weight: 500;
    background: transparent;
  }
  .btn--text:hover {
    color: var(--primary-dark);
    text-decoration: underline;
  }
  .btn--dark {
    background: #0F172A;
    color: #fff;
  }
  .btn--dark:hover {
    background: #1E293B;
  }
  .link-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
  }
  .link-more:hover {
    color: var(--primary-dark);
  }

  /* ===== Hero ===== */
  .hero {
    padding: 96px 24px;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    align-items: center;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
  }
  .hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59,130,246,.08);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 20px;
  }
  .hero h1 {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text);
    margin: 0 0 20px;
  }
  .hero__subtitle {
    font-size: 18px;
    font-weight: 600;
    color: #475569;
    line-height: 1.8;
    margin: 0 0 32px;
    max-width: 520px;
  }
  .hero__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    margin-bottom: 28px;
  }
  .hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: var(--text-sub);
  }
  .hero__meta i {
    margin-right: 6px;
    color: var(--primary);
  }
  .hero__visual img {
    width: 100%;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
  }

  /* ===== 数据统计 ===== */
  .stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
  }
  .stat-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
  }
  .stat-item strong {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    display: block;
    line-height: 1.3;
  }
  .stat-item span {
    font-size: 15px;
    color: var(--text-sub);
  }

  /* ===== 内容卡片 ===== */
  .card-post {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform .25s ease, box-shadow .25s ease;
    display: flex;
    flex-direction: column;
  }
  .card-post:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  .card-post__cover {
    display: block;
    overflow: hidden;
    aspect-ratio: 16 / 10;
  }
  .card-post__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .3s ease;
  }
  .card-post:hover .card-post__cover img {
    transform: scale(1.03);
  }
  .card-post__body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex: 1;
  }
  .badge {
    display: inline-block;
    background: rgba(59,130,246,.08);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
  }
  .card-post h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 14px 0 10px;
    line-height: 1.5;
  }
  .card-post h3 a:hover {
    color: var(--primary);
  }
  .card-post p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-sub);
    margin: 0 0 16px;
    flex: 1;
  }
  .card-post__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
  }
  .card-post__link:hover {
    color: var(--primary-dark);
  }

  /* ===== 信任区 ===== */
  .trust {
    background: var(--bg-soft);
  }
  .trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto 40px;
  }
  .trust-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .2s;
  }
  .trust-item:hover {
    box-shadow: var(--shadow-md);
  }
  .trust-item__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(59,130,246,.08);
    color: var(--primary);
    border-radius: 10px;
    font-size: 18px;
    margin-bottom: 16px;
  }
  .trust-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 8px;
  }
  .trust-item p {
    font-size: 14px;
    color: var(--text-sub);
    margin: 0;
    line-height: 1.7;
  }
  .trust-quote {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: 12px;
    padding: 28px 32px;
    box-shadow: var(--shadow-sm);
  }
  .trust-quote blockquote {
    margin: 0 0 8px;
    font-size: 16px;
    color: var(--text);
    line-height: 1.8;
  }
  .trust-quote__author {
    font-size: 13px;
    color: var(--text-sub);
  }

  /* ===== 最新资讯列表 ===== */
  .news-list {
    max-width: 900px;
    margin: 0 auto;
  }
  .news-item {
    display: grid;
    grid-template-columns: 96px 1fr 140px;
    align-items: center;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
    transition: background .15s;
  }
  .news-item:first-child {
    border-top: 1px solid var(--border);
  }
  .news-item:hover {
    background: var(--bg-soft);
  }
  .news-item__badge .badge {
    white-space: nowrap;
  }
  .news-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .news-item h3 a:hover {
    color: var(--primary);
  }
  .news-item p {
    font-size: 14px;
    color: var(--text-sub);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .news-item__time {
    font-size: 13px;
    color: var(--text-sub);
    text-align: right;
  }
  .empty-state {
    max-width: 900px;
    margin: 0 auto;
    padding: 48px 24px;
    text-align: center;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-sub);
    background: var(--bg-soft);
  }

  /* ===== 订阅 CTA ===== */
  .subscribe-cta {
    padding: 80px 24px;
  }
  .subscribe-cta__inner {
    max-width: 1100px;
    margin: 0 auto;
    background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
    border-radius: 24px;
    padding: 56px;
    color: #fff;
    box-shadow: var(--shadow-md);
  }
  .subscribe-cta__text h2 {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 10px;
  }
  .subscribe-cta__text p {
    font-size: 16px;
    color: rgba(255,255,255,.85);
    margin: 0 0 32px;
  }
  .subscribe-cta__form {
    display: flex;
    gap: 12px;
    max-width: 520px;
  }
  .subscribe-cta__form input {
    flex: 1;
    height: 48px;
    border-radius: 8px;
    border: none;
    padding: 0 16px;
    font-size: 15px;
    color: var(--text);
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
  }
  .subscribe-cta__form input:focus {
    outline: 2px solid rgba(255,255,255,.5);
  }
  .subscribe-cta__form .btn {
    height: 48px;
    white-space: nowrap;
  }
  .subscribe-cta__note {
    font-size: 12px;
    color: rgba(255,255,255,.75);
    margin-top: 16px;
  }

  /* ===== FAQ ===== */
  .faq-list {
    max-width: 780px;
    margin: 0 auto;
  }
  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 14px;
    padding: 0 20px;
    transition: box-shadow .2s;
  }
  .faq-item[open] {
    box-shadow: var(--shadow-sm);
  }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 18px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }
  .faq-item summary::-webkit-details-marker {
    display: none;
  }
  .faq-item summary::after {
    content: "\f078";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 13px;
    color: var(--text-sub);
    transition: transform .2s;
  }
  .faq-item[open] summary::after {
    transform: rotate(180deg);
  }
  .faq-item p {
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.7;
    padding: 0 0 18px;
    margin: 0;
  }

  /* ===== 页脚 ===== */
  .site-footer {
    margin-left: 240px;
    background: #0F172A;
    color: #CBD5E1;
    padding: 64px 0 28px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .footer-logo {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
  }
  .footer-col p {
    font-size: 14px;
    line-height: 1.8;
    margin: 0 0 12px;
  }
  .footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 16px;
  }
  .footer-col a {
    display: block;
    font-size: 14px;
    color: #CBD5E1;
    margin-bottom: 10px;
  }
  .footer-col a:hover {
    color: #fff;
  }
  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding-top: 24px;
    font-size: 13px;
    color: #94A3B8;
  }
  .footer-domain {
    letter-spacing: .3px;
  }

  /* ===== 移动导航 ===== */
  .mobile-nav {
    display: none;
    position: sticky;
    top: 0;
    z-index: 50;
    height: 56px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
  }
  .mobile-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
  }
  .mobile-nav__toggle {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text);
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
  }
  .mobile-nav__toggle:hover {
    background: var(--bg-soft);
  }
  .mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    z-index: 60;
    padding: 24px;
    display: flex;
    flex-direction: column;
    transform: translateX(-100%);
    transition: transform .3s ease;
  }
  .mobile-menu.open {
    transform: translateX(0);
  }
  .mobile-menu__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 32px;
  }
  .mobile-menu__head button {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text);
  }
  .mobile-menu__link {
    font-size: 20px;
    font-weight: 500;
    padding: 16px 0;
    color: var(--text);
    border-bottom: 1px solid var(--border);
  }
  .mobile-menu__link.active {
    color: var(--primary);
  }

  /* ===== 响应式 ===== */
  @media (max-width: 1023px) {
    .side-nav {
      display: none;
    }
    .main-content {
      margin-left: 0;
    }
    .site-footer {
      margin-left: 0;
    }
    .mobile-nav {
      display: flex;
    }
    .section {
      padding: 64px 0;
    }
    .hero {
      padding: 56px 16px;
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .hero h1 {
      font-size: 30px;
    }
    .hero__subtitle {
      font-size: 16px;
    }
  }

  @media (max-width: 767px) {
    .stats-row {
      grid-template-columns: 1fr;
    }
    .trust-grid {
      grid-template-columns: 1fr;
    }
    .news-item {
      grid-template-columns: 1fr;
      gap: 10px;
    }
    .news-item__time {
      text-align: left;
    }
    .section__head--row {
      flex-direction: column;
      align-items: flex-start;
      gap: 12px;
    }
    .subscribe-cta__inner {
      padding: 32px 24px;
    }
    .subscribe-cta__form {
      flex-direction: column;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 24px;
    }
    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }
    .hero__actions {
      flex-direction: column;
      align-items: stretch;
    }
    .btn {
      width: 100%;
    }
  }

/* roulang page: category1 */
:root {
      --primary: #3B82F6;
      --primary-dark: #2563EB;
      --secondary: #0EA5E9;
      --bg-white: #FFFFFF;
      --bg-soft: #F8FAFC;
      --text-main: #1E293B;
      --text-soft: #64748B;
      --border: #E2E8F0;
      --success: #10B981;
      --warning: #F59E0B;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.05);
      --shadow-hover: 0 4px 12px rgba(0,0,0,0.08), 0 12px 24px rgba(0,0,0,0.08);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-main);
      background: var(--bg-white);
      -webkit-font-smoothing: antialiased;
    }

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

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

    button,
    input {
      font-family: inherit;
    }

    .container-th {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

    /* ===== 侧边导航 ===== */
    .side-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 240px;
      height: 100vh;
      background: var(--bg-white);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      padding: 32px 20px 24px;
      z-index: 50;
    }

    .side-nav__brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-left: 4px;
      margin-bottom: 32px;
    }

    .side-nav__logo {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      font-weight: 700;
      flex-shrink: 0;
    }

    .side-nav__brand-name {
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .side-nav__menu {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .side-nav__link {
      position: relative;
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 14px;
      border-radius: 10px;
      font-size: 16px;
      font-weight: 500;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

    .side-nav__link i {
      width: 20px;
      font-size: 16px;
      color: var(--text-soft);
      transition: color 0.2s ease;
      text-align: center;
    }

    .side-nav__link:hover {
      background: var(--bg-soft);
      color: var(--primary);
    }

    .side-nav__link:hover i {
      color: var(--primary);
    }

    .side-nav__link.active {
      background: rgba(59, 130, 246, 0.08);
      color: var(--primary-dark);
      font-weight: 600;
    }

    .side-nav__link.active i {
      color: var(--primary);
    }

    .side-nav__link.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 20px;
      background: var(--primary);
      border-radius: 0 4px 4px 0;
    }

    .side-nav__contact {
      margin-top: auto;
      padding: 20px 4px 0;
      border-top: 1px solid var(--border);
      font-size: 13px;
      color: var(--text-soft);
    }

    .side-nav__contact p {
      margin: 6px 0;
    }

    /* ===== 移动导航 ===== */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 56px;
      background: var(--bg-white);
      border-bottom: 1px solid var(--border);
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
      z-index: 60;
    }

    .mobile-header__brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
    }

    .mobile-header__logo {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 14px;
      font-weight: 700;
    }

    .mobile-toggle {
      width: 40px;
      height: 40px;
      border: none;
      background: transparent;
      font-size: 20px;
      color: var(--text-main);
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.2s ease;
    }

    .mobile-toggle:hover {
      background: var(--bg-soft);
    }

    .mobile-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: var(--bg-white);
      z-index: 80;
      padding: 24px;
      flex-direction: column;
    }

    .mobile-overlay.open {
      display: flex;
    }

    .mobile-overlay__header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 32px;
    }

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

    .mobile-overlay__brand .mobile-header__logo {
      width: 36px;
      height: 36px;
    }

    .mobile-overlay__close {
      width: 40px;
      height: 40px;
      border: none;
      background: var(--bg-soft);
      border-radius: 8px;
      font-size: 18px;
      cursor: pointer;
      color: var(--text-main);
      transition: background 0.2s ease;
    }

    .mobile-overlay__close:hover {
      background: #E2E8F0;
    }

    .mobile-overlay .side-nav__menu {
      gap: 0;
    }

    .mobile-overlay .side-nav__link {
      font-size: 20px;
      padding: 18px 12px;
      border-radius: 0;
      border-bottom: 1px solid var(--border);
    }

    .mobile-overlay .side-nav__link i {
      font-size: 18px;
    }

    .mobile-overlay .side-nav__contact {
      margin-top: 40px;
      border-top: 1px solid var(--border);
    }

    /* ===== 右侧主体 ===== */
    .site-shell {
      margin-left: 240px;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    .site-main {
      flex: 1;
    }

    @media (max-width: 1023px) {
      .side-nav {
        display: none;
      }
      .mobile-header {
        display: flex;
      }
      .site-shell {
        margin-left: 0;
        padding-top: 56px;
      }
    }

    /* ===== 通用板块 ===== */
    .section {
      padding: 96px 0;
    }

    @media (max-width: 768px) {
      .section {
        padding: 64px 0;
      }
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.12em;
      color: var(--primary);
      background: rgba(59, 130, 246, 0.08);
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 16px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.01em;
      color: var(--text-main);
      margin: 0 0 16px;
    }

    @media (max-width: 768px) {
      .section-title {
        font-size: 24px;
      }
    }

    .section-sub {
      font-size: 16px;
      color: var(--text-soft);
      max-width: 640px;
      line-height: 1.8;
      margin: 0 0 40px;
    }

    /* ===== Hero ===== */
    .page-hero {
      position: relative;
      background: linear-gradient(135deg, rgba(240, 249, 255, 0.94), rgba(255, 255, 255, 0.92)), url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      padding: 96px 0;
    }

    @media (max-width: 768px) {
      .page-hero {
        padding: 56px 0;
      }
    }

    .page-hero__badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-dark);
      background: rgba(59, 130, 246, 0.08);
      border: 1px solid rgba(59, 130, 246, 0.1);
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
    }

    .page-hero h1 {
      font-size: 40px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin: 0 0 20px;
    }

    @media (max-width: 768px) {
      .page-hero h1 {
        font-size: 30px;
      }
    }

    .page-hero__lead {
      font-size: 18px;
      font-weight: 500;
      line-height: 1.8;
      color: #475569;
      max-width: 560px;
      margin: 0 0 32px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .hero-image {
      border-radius: 16px;
      box-shadow: var(--shadow-hover);
      aspect-ratio: 4 / 3;
      object-fit: cover;
      width: 100%;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 2px 6px rgba(59, 130, 246, 0.2);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 8px 20px rgba(59, 130, 246, 0.25);
    }

    .btn-primary:active {
      transform: translateY(0);
      background: #1D4ED8;
    }

    .btn-primary:focus-visible {
      outline: 2px solid rgba(59, 130, 246, 0.3);
      outline-offset: 2px;
    }

    .btn-secondary {
      background: #fff;
      color: var(--primary-dark);
      border: 1px solid #CBD5E1;
    }

    .btn-secondary:hover {
      border-color: var(--primary);
      background: rgba(59, 130, 246, 0.04);
      color: var(--primary-dark);
    }

    .btn-secondary:focus-visible {
      outline: 2px solid rgba(59, 130, 246, 0.3);
      outline-offset: 2px;
    }

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

    .btn-light:hover {
      background: #F1F5F9;
      transform: translateY(-1px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-weight: 600;
      transition: gap 0.2s ease;
    }

    .text-link:hover {
      text-decoration: underline;
      gap: 10px;
    }

    /* ===== 统计区 ===== */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 40px;
    }

    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
    }

    .stat-item {
      background: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: box-shadow 0.2s ease, transform 0.2s ease;
    }

    .stat-item:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }

    .stat-number {
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-soft);
    }

    /* ===== 卡片 ===== */
    .card-base {
      background: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .card-base:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }

    .icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(59, 130, 246, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }

    .cover-img {
      border-radius: 12px;
      object-fit: cover;
      width: 100%;
    }

    /* 核心内容区 */
    .core-grid {
      display: grid;
      grid-template-columns: 1.15fr 1fr;
      gap: 24px;
    }

    .core-stack {
      display: grid;
      gap: 24px;
    }

    @media (max-width: 768px) {
      .core-grid {
        grid-template-columns: 1fr;
      }
    }

    .core-feature-card {
      overflow: hidden;
    }

    .core-feature-card .cover-img {
      height: 220px;
      object-fit: cover;
      width: 100%;
    }

    .core-feature-body {
      padding: 24px;
    }

    .core-sm-card {
      padding: 24px;
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    /* ===== 场景区 ===== */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    @media (max-width: 768px) {
      .scenario-grid {
        grid-template-columns: 1fr;
      }
    }

    .scenario-card {
      padding: 28px;
      display: flex;
      flex-direction: column;
      gap: 14px;
      background: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: box-shadow 0.2s ease, transform 0.2s ease;
    }

    .scenario-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }

    .scenario-card h3 {
      font-size: 17px;
      font-weight: 600;
      margin: 0;
    }

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

    .scenario-card--highlight {
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.04), rgba(14, 165, 233, 0.04));
      border-color: rgba(59, 130, 246, 0.2);
    }

    /* ===== 流程区 ===== */
    .flow-section {
      background: var(--bg-soft);
    }

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

    @media (max-width: 768px) {
      .flow-grid {
        grid-template-columns: 1fr;
      }
    }

    .flow-step {
      text-align: center;
      padding: 32px 20px;
      background: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      position: relative;
    }

    .flow-number {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: rgba(59, 130, 246, 0.1);
      color: var(--primary-dark);
      font-size: 22px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .flow-step h3 {
      font-size: 17px;
      font-weight: 600;
      margin: 0 0 8px;
    }

    .flow-step p {
      font-size: 14px;
      color: var(--text-soft);
      margin: 0;
      line-height: 1.7;
    }

    /* ===== FAQ ===== */
    .faq-wrap {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      padding: 0 20px;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .faq-item[open] {
      border-color: rgba(59, 130, 246, 0.3);
      box-shadow: var(--shadow-card);
    }

    .faq-item summary {
      cursor: pointer;
      padding: 20px 0;
      font-size: 16px;
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      list-style: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      color: var(--text-soft);
      transition: transform 0.2s ease, color 0.2s ease;
      font-size: 14px;
      flex-shrink: 0;
    }

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

    .faq-answer {
      padding: 0 0 20px;
      color: var(--text-soft);
      font-size: 15px;
      line-height: 1.8;
    }

    /* ===== CTA ===== */
    .cta-panel {
      position: relative;
      background: linear-gradient(135deg, #3B82F6, #0EA5E9);
      border-radius: 24px;
      color: #fff;
      padding: 56px;
      overflow: hidden;
      box-shadow: var(--shadow-hover);
    }

    .cta-panel::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.1;
    }

    .cta-panel > * {
      position: relative;
      z-index: 1;
    }

    .cta-panel h2 {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      margin: 0 0 12px;
    }

    @media (max-width: 768px) {
      .cta-panel h2 {
        font-size: 26px;
      }
    }

    .cta-panel p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.82);
      max-width: 520px;
      margin: 0 0 24px;
    }

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

    @media (max-width: 520px) {
      .cta-panel {
        padding: 40px 24px;
      }
      .cta-actions .btn {
        width: 100%;
      }
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: #0F172A;
      color: #fff;
      padding: 56px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }

    .footer-logo {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .footer-col p {
      color: #94A3B8;
      font-size: 14px;
      line-height: 1.7;
      margin: 0 0 8px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      margin: 0 0 16px;
      color: #fff;
    }

    .footer-col a {
      color: #94A3B8;
      display: block;
      margin-bottom: 10px;
      font-size: 14px;
      transition: color 0.2s ease;
    }

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

    .footer-bottom {
      max-width: 1200px;
      margin: 48px auto 0;
      padding: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      color: #64748B;
      font-size: 12px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
    }

    @media (max-width: 768px) {
      .footer-bottom {
        padding: 20px 16px;
      }
    }

/* roulang page: article */
:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --secondary: #0EA5E9;
    --bg-soft: #F8FAFC;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --border-subtle: #E2E8F0;
    --radius-card: 12px;
    --radius-btn: 8px;
    --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.05);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.08), 0 12px 24px rgba(0,0,0,0.08);
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    background: #fff;
    color: #1E293B;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
  }
  a { text-decoration: none; color: inherit; }
  img { display: block; max-width: 100%; }
  button { font-family: inherit; cursor: pointer; }
  input, textarea { font-family: inherit; }

  .container-th {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* 品牌标 */
  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, #3B82F6, #2563EB);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 10px rgba(37,99,235,0.25);
  }
  .brand-mark--sm { width: 28px; height: 28px; min-width: 28px; font-size: 12px; border-radius: 8px; box-shadow: none; }

  /* 侧边导航 */
  .side-nav__link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 500;
    color: #475569;
    transition: all 0.2s ease;
  }
  .side-nav__link i {
    width: 20px;
    text-align: center;
    font-size: 15px;
  }
  .side-nav__link:hover {
    background: #F1F5F9;
    color: #2563EB;
  }
  .side-nav__link.active {
    background: #EFF6FF;
    color: #2563EB;
    font-weight: 600;
  }

  /* 移动端菜单 */
  #mobileNavOverlay {
    position: fixed;
    inset: 0;
    z-index: 70;
    background: #fff;
    display: flex;
    flex-direction: column;
    padding: 24px;
    transform: translateY(-100%);
    visibility: hidden;
    transition: transform 0.35s ease, visibility 0.35s ease;
  }
  #mobileNavOverlay.open {
    transform: translateY(0);
    visibility: visible;
  }
  @media (min-width: 1024px) {
    #mobileNavOverlay { display: none; }
  }
  .mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 10px;
    font-size: 18px;
    font-weight: 500;
    color: #1E293B;
    border-bottom: 1px solid #E2E8F0;
    transition: all 0.2s ease;
  }
  .mobile-nav-link i { width: 22px; text-align: center; font-size: 16px; }
  .mobile-nav-link:hover { background: #F8FAFC; color: #2563EB; }
  .mobile-nav-link.active { color: #2563EB; font-weight: 600; }

  /* 面包屑 */
  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #64748B;
  }
  .breadcrumb a { color: #3B82F6; transition: color 0.2s; }
  .breadcrumb a:hover { color: #2563EB; text-decoration: underline; }
  .breadcrumb__sep { color: #CBD5E1; }
  .breadcrumb__current { color: #64748B; font-weight: 500; }

  /* 徽章 */
  .badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.4;
    background: rgba(59,130,246,0.1);
    color: #2563EB;
  }

  /* 按钮 */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
  }
  .btn-primary {
    background: #3B82F6;
    color: #fff;
  }
  .btn-primary:hover {
    background: #2563EB;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(37,99,235,0.25);
  }
  .btn-primary:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(59,130,246,0.3);
  }
  .btn-light {
    background: #fff;
    color: #2563EB;
  }
  .btn-light:hover {
    background: #EFF6FF;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(2,6,23,0.15);
  }
  .btn-light:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(255,255,255,0.3);
  }

  /* 文章正文 */
  .article-body {
    font-size: 17px;
    line-height: 1.9;
    color: #334155;
    word-break: break-word;
  }
  .article-body h2 {
    font-size: 22px;
    font-weight: 600;
    color: #1E293B;
    margin: 32px 0 16px;
    line-height: 1.4;
  }
  .article-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: #1E293B;
    margin: 24px 0 12px;
    line-height: 1.4;
  }
  .article-body p { margin-bottom: 16px; }
  .article-body img {
    border-radius: 12px;
    margin: 24px 0;
    box-shadow: var(--shadow-card);
  }
  .article-body ul,
  .article-body ol {
    margin: 12px 0 16px;
    padding-left: 22px;
  }
  .article-body ul { list-style: disc; }
  .article-body ol { list-style: decimal; }
  .article-body li { margin-bottom: 8px; }
  .article-body blockquote {
    border-left: 4px solid #3B82F6;
    background: #F8FAFC;
    padding: 14px 18px;
    margin: 20px 0;
    border-radius: 0 10px 10px 0;
    color: #475569;
  }
  .article-body a {
    color: #3B82F6;
    text-decoration: underline;
    transition: color 0.2s;
  }
  .article-body a:hover { color: #2563EB; }
  .article-body code {
    background: #1E293B;
    color: #F1F5F9;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 14px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  }
  .article-body pre {
    background: #1E293B;
    color: #E2E8F0;
    padding: 20px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 20px 0;
  }
  .article-body pre code {
    background: none;
    padding: 0;
  }
  .article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 15px;
  }
  .article-body th,
  .article-body td {
    border: 1px solid #E2E8F0;
    padding: 10px 12px;
    text-align: left;
  }
  .article-body th {
    background: #F8FAFC;
    font-weight: 600;
  }

  /* 空状态 */
  .article-empty {
    text-align: center;
    padding: 60px 24px;
    background: #F8FAFC;
    border-radius: 16px;
    margin: 24px 0;
  }

  /* 多行截断 */
  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* 页脚 */
  .site-footer {
    background: #0F172A;
    color: #CBD5E1;
    padding: 56px 0 24px;
    font-size: 14px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 32px;
  }
  .footer-logo {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
  }
  .footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 16px;
    font-weight: 600;
  }
  .footer-col a {
    display: block;
    color: #94A3B8;
    margin-bottom: 10px;
    transition: color 0.2s;
  }
  .footer-col a:hover { color: #fff; }
  .footer-bottom {
    border-top: 1px solid #1E293B;
    margin-top: 40px;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    color: #94A3B8;
    font-size: 12px;
  }
  .footer-domain {
    letter-spacing: 0.5px;
    opacity: 0.8;
  }

  /* 响应式页脚 */
  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
  }