/* roulang page: index */
:root {
    --bg: #EFF6FA;
    --card: #FFFFFF;
    --brand: #0E6D98;
    --brand-dark: #0A4C6E;
    --accent: #00B8C9;
    --neon: #54F0E0;
    --ink: #081A29;
    --text: #11283A;
    --muted: #4E6C7E;
    --line: #D9E8F0;
    --green: #1E946F;
    --amber: #D08A2A;
    --radius: 18px;
    --shadow-card: 0 10px 30px rgba(14, 109, 152, 0.10);
    --shadow-card-hover: 0 18px 44px rgba(14, 109, 152, 0.18);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    padding-top: 68px;
  }

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

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

  button,
  input,
  textarea,
  select {
    font-family: inherit;
    font-size: inherit;
  }

  :focus-visible {
    outline: 3px solid rgba(0, 184, 201, 0.5);
    outline-offset: 3px;
    border-radius: 6px;
  }

  .site-container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  @media (min-width: 1024px) {
    .site-container {
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    height: 68px;
    background: #081A29;
    display: flex;
    align-items: center;
  }

  @media (min-width: 1024px) {
    .site-header {
      height: 72px;
    }
  }

  .nav-glow::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: linear-gradient(90deg, #54F0E0 0%, #58A6FF 50%, transparent 100%);
  }

  .nav-logo {
    display: inline-flex;
    align-items: center;
    font-size: 19px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.01em;
    white-space: nowrap;
  }

  .nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    font-weight: 500;
    padding: 0.5rem 0.25rem;
    transition: color 0.2s ease;
  }

  .nav-link:hover {
    color: #fff;
  }

  .nav-link:hover::after {
    content: "";
    display: block;
    height: 2px;
    margin-top: 2px;
    border-radius: 2px;
    background: #54F0E0;
    box-shadow: 0 0 8px rgba(84, 240, 224, 0.65);
  }

  .nav-link.active {
    color: #54F0E0;
    text-shadow: 0 0 8px rgba(84, 240, 224, 0.4);
  }

  .nav-link.active::after {
    content: "";
    display: block;
    height: 2px;
    margin-top: 2px;
    background: #54F0E0;
    box-shadow: 0 0 8px rgba(84, 240, 224, 0.8);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.2;
    padding: 0.85rem 1.6rem;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    cursor: pointer;
    min-height: 44px;
  }

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

  .btn-primary:hover {
    background: var(--brand-dark);
    border-color: var(--brand-dark);
    transform: translateY(-1px);
    box-shadow: 0 14px 26px rgba(10, 76, 110, 0.18);
  }

  .btn-primary:active {
    transform: scale(0.98);
  }

  .btn-outline {
    background: #fff;
    border-color: #B9D4E4;
    color: var(--brand);
  }

  .btn-outline:hover {
    border-color: var(--brand);
    background: rgba(14, 109, 152, 0.06);
    color: var(--brand-dark);
  }

  .btn-outline:active {
    transform: scale(0.98);
  }

  .btn-neon {
    background: var(--neon);
    border-color: var(--neon);
    color: #07151F;
    box-shadow: 0 8px 20px rgba(84, 240, 224, 0.22);
  }

  .btn-neon:hover {
    background: #fff;
    border-color: #fff;
    box-shadow: 0 12px 26px rgba(84, 240, 224, 0.4);
  }

  .btn-neon:active {
    transform: scale(0.98);
  }

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

  .btn-white:hover {
    background: rgba(255, 255, 255, 0.88);
    transform: translateY(-1px);
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: #00A6B8;
    background: rgba(0, 184, 201, 0.1);
    border-radius: 999px;
    padding: 0.3rem 0.8rem;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
  }

  .section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  @media (min-width: 1024px) {
    .section {
      padding-top: 6rem;
      padding-bottom: 6rem;
    }
  }

  .card {
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(217, 232, 240, 0.7);
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  }

  .card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: #B7D4E5;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: #E8F2F8;
    color: var(--brand);
    border-radius: 999px;
    padding: 0.2rem 0.7rem;
    font-size: 13px;
    font-weight: 600;
  }

  .icon-badge {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(145deg, #0E6D98, #0A4C6E);
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(239, 246, 250, 0.96), rgba(239, 246, 250, 0.84)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  }

  .hero-visual-shadow {
    box-shadow: 0 24px 70px rgba(14, 109, 152, 0.18);
  }

  .case-card {
    border-radius: 22px;
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(217, 232, 240, 0.7);
    transition: transform 0.22s ease, box-shadow 0.22s ease;
  }

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

  .price-card {
    background: #fff;
    border-radius: 22px;
    padding: 2rem 1.75rem;
    border: 1px solid rgba(217, 232, 240, 0.8);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    transition: transform 0.22s ease, box-shadow 0.22s ease;
  }

  .price-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card-hover);
  }

  .price-card-featured {
    background: #081A29;
    color: #fff;
    border-radius: 22px;
    padding: 2.4rem 1.8rem;
    border: 1px solid rgba(84, 240, 224, 0.4);
    box-shadow: 0 22px 50px rgba(8, 26, 41, 0.25);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
  }

  .price-card-featured::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #54F0E0, #58A6FF);
  }

  .faq-item {
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    padding: 1rem 0;
  }

  .faq-item summary {
    list-style: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    padding: 0.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
  }

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

  .faq-item summary::after {
    content: "+";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #E8F2F8;
    color: var(--brand);
    font-size: 20px;
    font-weight: 500;
    flex: none;
    transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
    background: var(--brand);
    color: #fff;
  }

  .faq-answer {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
    padding: 0 0.5rem 1rem 0;
    max-width: 720px;
  }

  .cta-panel {
    background: #081A29;
    border-radius: 28px;
    overflow: hidden;
    position: relative;
    color: #fff;
  }

  .cta-panel::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #54F0E0, #58A6FF, transparent);
  }

  .scene-list-item {
    border-bottom: 1px solid var(--line);
    transition: background 0.2s ease;
  }

  .scene-list-item:hover {
    background: rgba(239, 246, 250, 0.6);
  }

  .stat-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 18px;
    border: 1px solid rgba(217, 232, 240, 0.7);
  }

  .news-row {
    display: block;
    border-bottom: 1px solid var(--line);
    padding: 1rem 0.25rem;
    transition: background 0.2s ease, padding-left 0.2s ease;
  }

  .news-row:hover {
    background: rgba(239, 246, 250, 0.5);
    padding-left: 0.6rem;
  }

  @media (max-width: 767px) {
    .footer-grid {
      grid-template-columns: 1fr;
    }
  }

  .footer-link {
    color: rgba(255, 255, 255, 0.72);
    font-size: 15px;
    line-height: 2;
    transition: color 0.2s ease;
  }

  .footer-link:hover {
    color: #54F0E0;
  }

  .mobile-menu-panel {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #081A29;
    border-bottom: 2px solid rgba(84, 240, 224, 0.6);
    z-index: 49;
    display: none;
    padding: 0.75rem 1rem 1.25rem;
  }

  @media (min-width: 1024px) {
    .mobile-menu-panel {
      display: none !important;
    }
  }

  .mobile-menu-panel.open {
    display: block;
  }

  .mobile-menu-link {
    display: block;
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    padding: 0.9rem 0.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .mobile-menu-link:hover {
    color: #54F0E0;
  }

  .mobile-menu-link.active {
    color: #54F0E0;
    text-shadow: 0 0 8px rgba(84, 240, 224, 0.3);
  }

/* roulang page: category1 */
:root {
    --primary: #0E6D98;
    --primary-dark: #0A4C6E;
    --accent: #00B8C9;
    --neon: #54F0E0;
    --panel: #081A29;
    --ink: #11283A;
    --subtle: #4E6C7E;
    --line: #D9E8F0;
    --page-bg: #EFF6FA;
    --card-bg: #FFFFFF;
    --radius-card: 18px;
    --radius-btn: 12px;
    --shadow-card: 0 12px 34px rgba(14, 109, 152, 0.12);
    --shadow-hover: 0 18px 44px rgba(14, 109, 152, 0.18);
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--page-bg);
    color: var(--ink);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  * {
    box-sizing: border-box;
  }

  img,
  svg,
  button,
  input {
    max-width: 100%;
    outline: none;
  }

  a {
    text-decoration: none;
    color: inherit;
    transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
  }

  .site-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 16px;
    padding-right: 16px;
  }

  @media (min-width: 768px) {
    .site-container {
      padding-left: 24px;
      padding-right: 24px;
    }
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    height: 72px;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.82);
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 0 4px;
    white-space: nowrap;
  }

  .nav-link:hover {
    color: #ffffff;
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--neon);
    box-shadow: 0 0 8px rgba(84, 240, 224, 0.9);
  }

  .nav-link.active {
    color: var(--neon);
    text-shadow: 0 0 12px rgba(84, 240, 224, 0.45);
  }

  .footer-link {
    display: inline-block;
    padding: 6px 0;
    font-size: 14px;
    color: #BFD9EA;
    transition: color .2s ease, padding-left .2s ease;
  }

  .footer-link:hover {
    color: var(--neon);
    padding-left: 4px;
  }

  .site-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 999px;
    background: var(--neon);
    color: #07151F;
    font-weight: 600;
    font-size: 15px;
    border: 1px solid transparent;
    transition: background .2s, box-shadow .2s, transform .15s;
    white-space: nowrap;
  }

  .site-cta:hover {
    background: #ffffff;
    box-shadow: 0 0 18px rgba(84, 240, 224, 0.4);
    color: #07151F;
  }

  .site-cta:active {
    transform: scale(0.98);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 28px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: 15px;
    transition: background .2s ease, transform .15s, box-shadow .2s ease;
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 10px 26px rgba(14, 109, 152, 0.24);
    color: #fff;
  }

  .btn-primary:active {
    transform: scale(.98);
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 26px;
    background: #fff;
    color: var(--primary);
    border: 1px solid rgba(14, 109, 152, .35);
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: 15px;
  }

  .btn-ghost:hover {
    border-color: var(--primary);
    background: rgba(14, 109, 152, 0.06);
    color: var(--primary-dark);
  }

  .btn-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 34px;
    background: var(--neon);
    color: #07151F;
    border-radius: 12px;
    font-weight: 700;
    font-size: 16px;
    transition: all .2s ease;
  }

  .btn-light:hover {
    background: #fff;
    box-shadow: 0 0 22px rgba(84, 240, 224, .45);
    transform: translateY(-2px);
  }

  .hero-bg {
    background-image: linear-gradient(110deg, rgba(239, 246, 250, .98) 28%, rgba(239, 246, 250, .88) 56%, rgba(239, 246, 250, .82)),
      url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
  }

  .section-padding {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  @media (min-width: 992px) {
    .section-padding {
      padding-top: 96px;
      padding-bottom: 96px;
    }
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .04em;
    color: var(--accent);
    text-transform: none;
    background: rgba(0, 184, 201, .1);
    padding: 6px 14px;
    border-radius: 999px;
  }

  .category-card {
    background: #fff;
    border: 1px solid rgba(217, 232, 240, 0.9);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    height: 100%;
  }

  .category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(14, 109, 152, .3);
  }

  .info-card {
    background: #fff;
    border-radius: 16px;
    border: 1px solid var(--line);
    padding: 24px;
    transition: box-shadow .25s, transform .25s;
  }

  .info-card:hover {
    box-shadow: 0 14px 32px rgba(14, 109, 152, 0.12);
    transform: translateY(-2px);
  }

  .info-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    border-radius: 14px;
    background: rgba(14, 109, 152, .09);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--subtle);
  }

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

  .breadcrumb-list a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
  }

  .divider-line {
    height: 1px;
    background: var(--line);
  }

  .anchor-nav-item {
    display: block;
    background: #fff;
    padding: 24px 22px;
    border-radius: 16px;
    border: 1px solid var(--line);
    transition: all .25s ease;
    position: relative;
  }

  .anchor-nav-item:hover {
    border-color: rgba(14, 109, 152, .35);
    box-shadow: 0 12px 28px rgba(14, 109, 152, .12);
    transform: translateY(-3px);
  }

  .anchor-nav-item .anchor-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(0, 184, 201, .12);
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  details.faq-item {
    border-bottom: 1px solid var(--line);
    padding: 20px 0;
  }

  details.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    list-style: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.6;
  }

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

  details.faq-item summary::after {
    content: "+";
    font-size: 24px;
    font-weight: 300;
    color: var(--primary);
    width: 28px;
    text-align: right;
    flex-shrink: 0;
    transition: transform .25s ease;
  }

  details.faq-item[open] summary::after {
    content: "−";
    transform: rotate(180deg);
  }

  details.faq-item .faq-answer {
    margin-top: 10px;
    font-size: 15px;
    color: var(--subtle);
    max-width: 680px;
    padding-right: 12px;
  }

  .category-img-wrap {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 16px 40px rgba(14, 109, 152, .14);
  }

  .category-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .step-index {
    font-size: 40px;
    line-height: 1;
    font-weight: 800;
    color: rgba(14, 109, 152, .2);
    font-family: inherit;
  }

  .soft-blue-block {
    background: rgba(14, 109, 152, .05);
    border-radius: 20px;
  }

  .dot-badge {
    font-size: 13px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(0, 184, 201, .1);
    color: #028394;
    font-weight: 600;
  }

  .media-tag {
    font-size: 13px;
    padding: 4px 12px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    background: rgba(14, 109, 152, .09);
    font-weight: 500;
  }

  .corner-card {
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
  }

  .dark-cta-card {
    background: var(--panel);
    border-radius: 26px;
    position: relative;
    overflow: hidden;
  }

  .dark-cta-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 360px;
    height: 2px;
    background: linear-gradient(90deg, var(--neon), #58A6FF, transparent);
    border-radius: 2px;
  }

  .dark-cta-card::after {
    content: "";
    position: absolute;
    right: -120px;
    bottom: -120px;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(84, 240, 224, .14), transparent 68%);
    pointer-events: none;
  }

  .topic-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    transition: border-color .2s, box-shadow .2s;
  }

  .topic-chip:hover {
    border-color: rgba(14, 109, 152, .4);
    box-shadow: 0 8px 20px rgba(14, 109, 152, .1);
  }

  .pill-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
  }

  .pill-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
  }

  @media (max-width: 768px) {
    .section-padding {
      padding-top: 56px;
      padding-bottom: 56px;
    }

    .nav-link {
      height: auto;
      min-height: 48px;
    }

    .step-index {
      font-size: 32px;
    }
  }

/* roulang page: article */
:root {
    --color-bg: #EFF6FA;
    --color-surface: #FFFFFF;
    --color-primary: #0E6D98;
    --color-primary-dark: #0A4C6E;
    --color-cyan: #00B8C9;
    --color-neon: #54F0E0;
    --color-panel: #081A29;
    --color-text: #11283A;
    --color-muted: #4E6C7E;
    --color-line: #D9E8F0;
    --color-success: #1E946F;
    --shadow-card: 0 10px 30px rgba(14, 109, 152, 0.10);
    --shadow-hover: 0 20px 40px rgba(14, 109, 152, 0.16);
    --radius-card: 18px;
    --radius-btn: 12px;
    --radius-tag: 999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.75;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

button,
input,
textarea {
    font-family: inherit;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-neon);
    outline-offset: 3px;
    border-radius: 6px;
}

.site-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 16px;
    padding-right: 16px;
}

@media (min-width: 768px) {
    .site-container {
        padding-left: 24px;
        padding-right: 24px;
    }
}

.neon-line {
    height: 2px;
    background: linear-gradient(90deg, #54F0E0 0%, #58A6FF 52%, rgba(88, 166, 255, 0) 100%);
    width: 100%;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.82);
    font-size: 15px;
    padding: 8px 2px 14px;
    transition: color .2s ease;
    white-space: nowrap;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    height: 2px;
    width: 0;
    background: var(--color-neon);
    border-radius: 999px;
    box-shadow: 0 0 8px rgba(84, 240, 224, 0.6);
    transition: width .22s ease;
}

.nav-link:hover {
    color: #ffffff;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active {
    color: var(--color-neon);
    text-shadow: 0 0 10px rgba(84, 240, 224, 0.4);
}

.nav-link.active::after {
    width: 100%;
    background: var(--color-neon);
    box-shadow: 0 0 10px rgba(84, 240, 224, 0.8);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 10px;
    background: var(--color-neon);
    color: #07151F;
    font-size: 15px;
    font-weight: 600;
    transition: background .2s ease, transform .15s ease;
}

.nav-cta:hover {
    background: #ffffff;
}

.nav-cta:active {
    transform: scale(0.98);
}

.mobile-nav .nav-link {
    display: flex;
    align-items: center;
    min-height: 48px;
    width: 100%;
    padding: 0 12px;
    border-radius: 12px;
    font-size: 15px;
}

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

.footer-link {
    color: #BFD9EA;
    line-height: 2.2;
    transition: color .2s ease;
    font-size: 14px;
}

.footer-link:hover {
    color: var(--color-neon);
}

.breadcrumb-wrap {
    font-size: 14px;
    color: var(--color-muted);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.breadcrumb-wrap a {
    color: var(--color-primary);
    transition: color .2s ease;
}

.breadcrumb-wrap a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.breadcrumb-sep {
    width: 16px;
    height: 1px;
    background: #B9CFDD;
    display: inline-block;
}

.page-main {
    padding-top: 108px;
    padding-bottom: 80px;
    min-height: 75vh;
}

@media (min-width: 1024px) {
    .page-main {
        padding-top: 132px;
    }
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 24px;
    color: var(--color-muted);
    font-size: 14px;
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.meta-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: #93AEBF;
    display: inline-block;
}

.format-article {
    font-size: 16px;
    line-height: 1.9;
    color: var(--color-text);
    word-wrap: break-word;
}

.format-article p {
    margin: 1.7em 0;
}

.format-article h1,
.format-article h2,
.format-article h3,
.format-article h4 {
    color: #0E2740;
}

.format-article h2 {
    font-size: 26px;
    font-weight: 700;
    margin: 40px 0 16px;
    line-height: 1.4;
}

.format-article h3 {
    font-size: 21px;
    font-weight: 600;
    margin: 28px 0 12px;
    line-height: 1.5;
}

.format-article h4 {
    font-size: 18px;
    font-weight: 600;
    margin: 22px 0 10px;
}

.format-article img {
    border-radius: 16px;
    margin: 28px auto;
    box-shadow: 0 8px 24px rgba(14, 109, 152, 0.12);
}

.format-article a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color .2s ease;
}

.format-article a:hover {
    color: var(--color-primary-dark);
}

.format-article blockquote {
    margin: 24px 0;
    padding: 4px 0 4px 22px;
    border-left: 4px solid var(--color-primary);
    color: var(--color-muted);
    background: rgba(14, 109, 152, 0.04);
    border-radius: 0 12px 12px 0;
}

.format-article ul,
.format-article ol {
    margin: 16px 0 20px;
    padding-left: 24px;
}

.format-article ul {
    list-style: disc;
}

.format-article ol {
    list-style: decimal;
}

.format-article li {
    margin: 8px 0;
}

.format-article pre {
    background: #081A29;
    color: #D7F5F1;
    padding: 20px;
    border-radius: 14px;
    overflow-x: auto;
    margin: 24px 0;
    font-size: 14px;
    line-height: 1.7;
}

.format-article code {
    background: #E4EFF5;
    padding: 3px 7px;
    border-radius: 6px;
    font-size: 0.9em;
    color: #0E6D98;
}

.format-article pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.format-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.format-article th,
.format-article td {
    border: 1px solid var(--color-line);
    padding: 10px 14px;
    text-align: left;
}

.format-article th {
    background: #EFF6FA;
    color: #0A4C6E;
}

.reco-card {
    display: block;
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: 0 6px 18px rgba(14, 109, 152, 0.08);
    transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.reco-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(14, 109, 152, 0.35);
}

.reco-card img {
    width: 100%;
    height: 168px;
    object-fit: cover;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-cyan);
    letter-spacing: 0.1em;
}

.article-empty {
    background: #fff;
    border: 2px dashed rgba(14, 109, 152, 0.35);
    border-radius: 20px;
    box-shadow: var(--shadow-card);
    text-align: center;
    padding: 60px 20px;
}

.cta-panel {
    border-radius: 26px;
    border: 1px solid rgba(84, 240, 224, 0.28);
}

.cta-panel .neon-tag {
    color: var(--color-neon);
}

.btn-neon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 26px;
    border-radius: var(--radius-btn);
    background: var(--color-neon);
    color: #07151F;
    font-size: 15px;
    font-weight: 600;
    transition: background .2s ease, transform .15s ease;
}

.btn-neon:hover {
    background: #ffffff;
}

.btn-neon:active {
    transform: scale(0.98);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: var(--radius-btn);
    border: 1px solid rgba(14, 109, 152, 0.55);
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
    background: transparent;
    transition: background .2s ease, border-color .2s ease, color .2s ease;
}

.btn-outline:hover {
    border-color: var(--color-primary-dark);
    background: rgba(14, 109, 152, 0.07);
    color: var(--color-primary-dark);
}

@media (max-width: 520px) {
    .format-article {
        font-size: 15px;
        line-height: 1.85;
    }

    .article-meta {
        gap: 12px;
        font-size: 13px;
    }

    .meta-dot {
        display: none;
    }
}

/* roulang page: category2 */
:root {
    --page-bg: #EFF6FA;
    --card-bg: #FFFFFF;
    --brand: #0E6D98;
    --brand-deep: #0A4C6E;
    --cyan: #00B8C9;
    --neon: #54F0E0;
    --dark: #081A29;
    --text: #11283A;
    --muted: #4E6C7E;
    --border: #D9E8F0;
    --radius-lg: 18px;
    --radius-sm: 10px;
    --shadow: 0 14px 34px rgba(14, 109, 152, 0.08);
    --shadow-hover: 0 22px 46px rgba(14, 109, 152, 0.14);
    --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--page-bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  body.nav-lock {
    overflow: hidden;
  }

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

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

  button,
  input,
  textarea,
  select {
    font-family: inherit;
    font-size: inherit;
  }

  section[id],
  div[id] {
    scroll-margin-top: 88px;
  }

  .site-container {
    width: min(1200px, 100% - 32px);
    margin-left: auto;
    margin-right: auto;
  }

  /* 顶部导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--dark);
    box-shadow: 0 10px 30px rgba(8, 26, 41, 0.18);
  }

  .header-topline {
    height: 2px;
    background: linear-gradient(90deg, var(--neon) 0%, #58A6FF 48%, transparent 100%);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 72px;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #FFFFFF;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
  }

  .logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 9px;
    background: rgba(84, 240, 224, 0.12);
  }

  .logo-mark svg {
    display: block;
  }

  .nav-list {
    display: flex;
    align-items: center;
    gap: 28px;
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: color 0.2s ease;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 100%;
    height: 2px;
    background: var(--neon);
    border-radius: 999px;
    opacity: 0;
    transform: scaleX(0.3);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .nav-link:hover {
    color: #FFFFFF;
  }

  .nav-link:hover::after {
    opacity: 1;
    transform: scaleX(1);
    box-shadow: 0 0 9px rgba(84, 240, 224, 0.7);
  }

  .nav-link.active {
    color: var(--neon);
    text-shadow: 0 0 10px rgba(84, 240, 224, 0.45);
  }

  .nav-link.active::after {
    opacity: 1;
    transform: scaleX(1);
    box-shadow: 0 0 8px rgba(84, 240, 224, 0.75);
  }

  .nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    background: transparent;
    color: #FFFFFF;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
  }

  .nav-toggle:hover,
  .nav-toggle:focus-visible {
    border-color: var(--neon);
    background: rgba(84, 240, 224, 0.08);
  }

  .nav-toggle:focus-visible,
  .btn:focus-visible,
  .nav-link:focus-visible,
  .footer-link:focus-visible,
  .summary:focus-visible,
  .anchor-card:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
  }

  .mobile-menu {
    display: none;
    width: 100%;
    padding: 8px 16px 22px;
    background: #071521;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
  }

  .mobile-menu.is-open {
    display: block;
  }

  .mobile-link {
    display: flex;
    align-items: center;
    min-height: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.85);
    font-size: 16px;
  }

  .mobile-link:hover,
  .mobile-link.active {
    color: var(--neon);
  }

  .mobile-link.active {
    font-weight: 600;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 26px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  }

  .btn-block {
    width: 100%;
    margin-top: 14px;
  }

  .btn-neon {
    background: var(--neon);
    color: #07151F;
    border-color: var(--neon);
  }

  .btn-neon:hover {
    background: #FFFFFF;
    border-color: #FFFFFF;
    color: #07151F;
    box-shadow: 0 10px 24px rgba(84, 240, 224, 0.22);
  }

  .btn-neon:active {
    transform: scale(0.98);
  }

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

  .btn-primary:hover {
    background: var(--brand-deep);
    box-shadow: 0 10px 24px rgba(14, 109, 152, 0.25);
  }

  .btn-primary:active {
    transform: translateY(2px);
  }

  .btn-outline {
    background: transparent;
    border-color: var(--brand);
    color: var(--brand);
  }

  .btn-outline:hover {
    background: rgba(14, 109, 152, 0.06);
    border-color: var(--brand-deep);
    color: var(--brand-deep);
  }

  .btn-outline:active {
    transform: translateY(1px);
  }

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

  /* 页面通用部分 */
  .section {
    padding: 96px 0;
  }

  .section-soft {
    background: #F4F9FC;
  }

  .sec-head {
    max-width: 780px;
    margin-bottom: 42px;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 14px 4px 6px;
    border: 1px solid rgba(0, 184, 201, 0.25);
    background: rgba(0, 184, 201, 0.08);
    color: var(--cyan);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
  }

  .eyebrow::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 99px;
    background: var(--cyan);
    box-shadow: 0 0 0 5px rgba(0, 184, 201, 0.14);
  }

  .section-title {
    margin: 12px 0 0;
    color: var(--text);
    font-size: 34px;
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: -0.01em;
  }

  .section-sub {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 16px;
    max-width: 720px;
  }

  /* 分类页顶部 */
  .page-hero {
    position: relative;
    padding: 78px 0 110px;
    background:
      linear-gradient(180deg, rgba(239, 246, 250, 0.92) 0%, rgba(244, 249, 252, 0.96) 100%),
      url('/assets/images/backpic/back-1.png') center 20% / cover no-repeat;
    border-bottom: 1px solid rgba(14, 109, 152, 0.08);
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-bottom: 20px;
    color: var(--muted);
    font-size: 14px;
  }

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

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

  .breadcrumb span {
    color: #A5BACC;
  }

  .page-hero h1 {
    margin: 0;
    color: var(--text);
    font-size: 48px;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
  }

  .page-hero-lead {
    max-width: 720px;
    margin: 18px 0 0;
    color: var(--muted);
    font-size: 17px;
  }

  .page-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
  }

  .page-hero-note {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
  }

  .soft-badge {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 12px;
    border: 1px solid rgba(14, 109, 152, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.7);
    color: var(--brand);
    font-size: 13px;
    font-weight: 500;
  }

  /* 站内目录卡 */
  .anchor-wrap {
    margin-top: -58px;
    position: relative;
    z-index: 5;
  }

  .anchor-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .anchor-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid rgba(217, 232, 240, 0.9);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  }

  .anchor-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 184, 201, 0.35);
    box-shadow: var(--shadow-hover);
  }

  .anchor-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: #E6F4FA;
    color: var(--brand);
    font-size: 14px;
    font-weight: 700;
  }

  .anchor-name {
    display: block;
    color: var(--text);
    font-size: 16px;
    font-weight: 600;
  }

  .anchor-desc {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.6;
  }

  /* 流程模块 */
  .flow-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .flow-step {
    position: relative;
    overflow: hidden;
    padding: 28px 24px 24px;
    background: var(--card-bg);
    border: 1px solid rgba(217, 232, 240, 0.75);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  }

  .flow-step:hover {
    transform: translateY(-4px);
    border-color: rgba(14, 109, 152, 0.2);
    box-shadow: var(--shadow-hover);
  }

  .flow-step::before {
    content: "";
    position: absolute;
    left: 24px;
    top: 0;
    width: 46px;
    height: 3px;
    border-radius: 0 0 8px 8px;
    background: linear-gradient(90deg, var(--brand), var(--cyan));
  }

  .step-index {
    display: inline-flex;
    color: var(--cyan);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.04em;
  }

  .flow-step h3 {
    margin: 14px 0 0;
    color: var(--text);
    font-size: 19px;
    font-weight: 700;
    line-height: 1.4;
  }

  .flow-step p {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
  }

  /* 左右分栏内容 */
  .split-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }

  .split-media {
    overflow: hidden;
    border-radius: 20px;
    background: #FFFFFF;
    box-shadow: var(--shadow);
    border: 1px solid rgba(217, 232, 240, 0.8);
  }

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

  .split-copy h2 {
    margin: 0;
    color: var(--text);
    font-size: 32px;
    line-height: 1.35;
    font-weight: 700;
    letter-spacing: -0.01em;
  }

  .split-copy > p {
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 16px;
  }

  .help-list {
    list-style: none;
    margin: 18px 0 0;
    padding: 0;
  }

  .help-list li {
    position: relative;
    margin-bottom: 13px;
    padding-left: 26px;
    color: var(--text);
    font-size: 15px;
  }

  .help-list li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 0.62em;
    width: 8px;
    height: 8px;
    border-radius: 99px;
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(0, 184, 201, 0.14);
  }

  .copy-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 26px;
  }

  .chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
  }

  .chip {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 13px;
    border: 1px solid rgba(14, 109, 152, 0.12);
    border-radius: 999px;
    background: rgba(14, 109, 152, 0.06);
    color: var(--brand);
    font-size: 13px;
    font-weight: 500;
  }

  /* 支持入口卡 */
  .support-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .support-card {
    background: var(--card-bg);
    border: 1px solid rgba(217, 232, 240, 0.9);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 26px 24px;
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  }

  .support-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 184, 201, 0.3);
    box-shadow: var(--shadow-hover);
  }

  .support-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 13px;
    background: #E6F4FA;
    color: var(--brand);
  }

  .support-card h3 {
    margin: 20px 0 0;
    color: var(--text);
    font-size: 18px;
    font-weight: 700;
  }

  .support-card p {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
  }

  .support-card small {
    display: block;
    margin-top: 14px;
    color: #8AA8B8;
    font-size: 13px;
  }

  /* FAQ */
  .faq-layout {
    display: grid;
    grid-template-columns: 1fr 1.7fr;
    gap: 64px;
  }

  .faq-aside h2 {
    margin: 12px 0 0;
    color: var(--text);
    font-size: 34px;
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: -0.01em;
  }

  .faq-aside p {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 16px;
  }

  .faq-aside .link-line {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 22px;
    color: var(--brand);
    font-weight: 600;
    transition: color 0.2s ease;
  }

  .faq-aside .link-line:hover {
    color: var(--brand-deep);
  }

  .faq-list {
    border-top: 1px solid var(--border);
  }

  .faq-item {
    border-bottom: 1px solid var(--border);
  }

  .faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    cursor: pointer;
    color: var(--text);
    font-size: 16px;
    font-weight: 600;
    padding: 24px 2px;
    transition: color 0.2s ease;
  }

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

  .faq-item summary:hover {
    color: var(--brand);
  }

  .faq-item summary::after {
    content: "+";
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(14, 109, 152, 0.08);
    color: var(--brand);
    font-size: 20px;
    font-weight: 500;
    transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
  }

  .faq-item[open] summary {
    color: var(--brand);
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
    background: var(--brand);
    color: #FFFFFF;
  }

  .faq-answer {
    padding: 0 34px 26px 2px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.8;
  }

  .faq-answer p {
    margin: 0;
  }

  /* CTA */
  .cta-panel {
    position: relative;
    overflow: hidden;
    padding: 60px 48px;
    border-radius: 26px;
    background: var(--dark);
    color: #FFFFFF;
  }

  .cta-panel::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--neon), #58A6FF, transparent);
  }

  .cta-panel::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -90px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(84, 240, 224, 0.2) 0%, transparent 68%);
  }

  .cta-title {
    margin: 0;
    max-width: 660px;
    font-size: 34px;
    line-height: 1.4;
    font-weight: 700;
    letter-spacing: -0.01em;
  }

  .cta-text {
    margin: 16px 0 0;
    max-width: 680px;
    color: #BFD9EA;
    font-size: 16px;
  }

  .cta-actions {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 14px;
    margin-top: 30px;
  }

  /* 页脚 */
  .site-footer {
    position: relative;
    background: var(--dark);
    color: #FFFFFF;
    padding: 64px 0 28px;
  }

  .footer-topline {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--neon), #58A6FF, transparent);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
    gap: 40px;
  }

  .footer-logo-line {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #FFFFFF;
    font-size: 19px;
    font-weight: 700;
  }

  .footer-logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 9px;
    background: rgba(84, 240, 224, 0.12);
  }

  .footer-note {
    max-width: 360px;
    margin: 16px 0 0;
    color: #BFD9EA;
    font-size: 14px;
    line-height: 1.8;
  }

  .footer-caption {
    margin: 0 0 18px;
    color: rgba(255, 255, 255, 0.48);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
  }

  .footer-links {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .footer-links li {
    margin-bottom: 4px;
  }

  .footer-link {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    color: #BFD9EA;
    font-size: 14px;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .footer-link:hover {
    color: var(--neon);
    padding-left: 4px;
  }

  .footer-contact {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .footer-contact li {
    margin-bottom: 10px;
    color: #BFD9EA;
    font-size: 14px;
    line-height: 1.6;
  }

  .footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    margin-top: 48px;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.09);
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
  }

  @media (max-width: 1200px) {
    .anchor-grid {
      grid-template-columns: repeat(2, 1fr);
    }

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

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

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

  @media (max-width: 1023px) {
    .nav-list {
      display: none;
    }

    .nav-call {
      display: none;
    }

    .nav-toggle {
      display: inline-flex;
    }

    .header-inner {
      min-height: 64px;
    }
  }

  @media (max-width: 991px) {
    .section {
      padding: 68px 0;
    }

    .page-hero {
      padding: 56px 0 118px;
    }

    .page-hero h1 {
      font-size: 40px;
    }

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

    .split-grid {
      grid-template-columns: 1fr;
      gap: 36px;
    }

    .split-flip .split-media {
      order: 2;
    }

    .split-copy h2 {
      font-size: 28px;
    }

    .cta-panel {
      padding: 44px 28px;
    }
  }

  @media (max-width: 640px) {
    .site-container {
      width: min(100% - 28px, 1200px);
    }

    body {
      font-size: 15px;
    }

    .section {
      padding: 56px 0;
    }

    .page-hero {
      padding: 44px 0 104px;
    }

    .page-hero h1 {
      font-size: 31px;
    }

    .page-hero-lead {
      font-size: 15px;
    }

    .section-title,
    .faq-aside h2 {
      font-size: 26px;
    }

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

    .anchor-grid,
    .flow-grid,
    .support-grid {
      grid-template-columns: 1fr;
      gap: 14px;
    }

    .logo {
      font-size: 18px;
    }

    .cta-title {
      font-size: 26px;
    }

    .cta-text {
      font-size: 15px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .footer-bottom {
      flex-direction: column;
    }

    .faq-item summary {
      font-size: 15px;
      padding: 18px 2px;
    }

    .faq-answer {
      padding-right: 10px;
    }
  }

  @media (max-width: 360px) {
    .logo {
      font-size: 16px;
    }

    .nav-toggle {
      width: 40px;
      height: 40px;
    }
  }

/* roulang page: category3 */
:root {
            --brand: #0E6D98;
            --brand-dark: #0A4C6E;
            --accent: #00B8C9;
            --neon: #54F0E0;
            --navy: #081A29;
            --page: #F4F9FC;
            --ink: #11283A;
            --muted: #4E6C7E;
            --line: #D9E8F0;
            --card-shadow: 0 18px 40px rgba(14, 109, 152, 0.08);
            --card-shadow-hover: 0 22px 48px rgba(14, 109, 152, 0.16);
            --radius-card: 18px;
            --radius-btn: 12px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--page);
            color: var(--ink);
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            padding-top: 68px;
            -webkit-font-smoothing: antialiased;
        }

        @media (min-width: 1024px) {
            body {
                padding-top: 72px;
            }
        }

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

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

        button,
        input {
            font: inherit;
        }

        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }

        @media (min-width: 1024px) {
            .site-container {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        .site-header {
            background: var(--navy);
            box-shadow: 0 8px 30px rgba(8, 26, 41, 0.28);
        }

        .nav-glow-line {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--neon), #58A6FF, transparent);
            pointer-events: none;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 44px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.02em;
            transition: color 0.2s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 5px;
            height: 2px;
            border-radius: 999px;
            background: var(--neon);
            box-shadow: 0 0 8px rgba(84, 240, 224, 0.7);
            opacity: 0;
            transform: scaleX(0.5);
            transition: opacity 0.2s ease, transform 0.2s ease;
        }

        .nav-link:hover {
            color: #fff;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .nav-link.active {
            color: var(--neon);
            text-shadow: 0 0 10px rgba(84, 240, 224, 0.45);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 42px;
            padding: 0 22px;
            border-radius: var(--radius-btn);
            background: var(--neon);
            color: #07151F;
            font-size: 15px;
            font-weight: 700;
            transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
            box-shadow: 0 0 24px rgba(84, 240, 224, 0.18);
        }

        .header-cta:hover {
            background: #fff;
            box-shadow: 0 0 18px rgba(84, 240, 224, 0.36);
        }

        .header-cta:active {
            transform: scale(0.98);
        }

        .mobile-nav-link {
            display: flex;
            align-items: center;
            min-height: 48px;
            padding: 0 6px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 16px;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color 0.2s ease;
        }

        .mobile-nav-link.active,
        .mobile-nav-link:hover {
            color: var(--neon);
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
        }

        .breadcrumb a {
            transition: color 0.2s ease;
        }

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

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(0, 184, 201, 0.1);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            background: var(--brand);
            color: #fff;
            font-weight: 600;
            transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
        }

        .btn-primary:hover {
            background: var(--brand-dark);
            box-shadow: 0 10px 24px rgba(14, 109, 152, 0.22);
        }

        .btn-primary:active {
            transform: translateY(2px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(14, 109, 152, 0.45);
            color: var(--brand-dark);
            font-weight: 600;
            background: rgba(255, 255, 255, 0.6);
            transition: border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
        }

        .btn-outline:hover {
            border-color: var(--brand);
            background: #fff;
            color: var(--brand-dark);
        }

        .btn-outline:active {
            transform: translateY(2px);
        }

        .scenario-direct-card {
            display: flex;
            flex-direction: column;
            min-height: 168px;
            padding: 22px;
            border-radius: var(--radius-card);
            background: #fff;
            border: 1px solid rgba(217, 232, 240, 0.7);
            box-shadow: 0 8px 24px rgba(14, 109, 152, 0.06);
            transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
        }

        .scenario-direct-card:hover {
            transform: translateY(-4px);
            border-color: rgba(14, 109, 152, 0.32);
            box-shadow: var(--card-shadow-hover);
        }

        .scenario-direct-card:focus-visible {
            outline: 3px solid rgba(0, 184, 201, 0.35);
            outline-offset: 2px;
        }

        .scenario-num {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.1em;
            color: var(--accent);
        }

        .scenario-visual {
            position: relative;
            border-radius: 22px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(217, 232, 240, 0.7);
        }

        .scenario-visual img {
            width: 100%;
            height: 100%;
            min-height: 260px;
            object-fit: cover;
        }

        .scenario-visual .visual-caption {
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 14px;
            border-radius: 14px;
            padding: 12px 16px;
            background: rgba(8, 26, 41, 0.7);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 13px;
            line-height: 1.5;
        }

        .check-list {
            display: grid;
            gap: 10px;
            padding: 0;
            margin: 0;
            list-style: none;
        }

        .check-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--ink);
            font-size: 15px;
            line-height: 1.7;
        }

        .check-icon {
            flex: 0 0 auto;
            width: 20px;
            height: 20px;
            margin-top: 4px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 184, 201, 0.14);
            color: var(--accent);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.06em;
        }

        .section-tag::before {
            content: "";
            width: 18px;
            height: 2px;
            border-radius: 999px;
            background: var(--accent);
        }

        .faq-item {
            border-bottom: 1px solid rgba(14, 109, 152, 0.14);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 20px 2px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            list-style: none;
            color: var(--ink);
            transition: color 0.2s ease;
        }

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

        .faq-item summary:hover {
            color: var(--brand);
        }

        .faq-icon {
            flex: 0 0 auto;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(14, 109, 152, 0.25);
            color: var(--brand);
            transition: transform 0.25s ease, background 0.2s ease, border-color 0.2s ease;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        .faq-item .answer {
            padding: 0 2px 22px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
        }

        .footer-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 32px;
            color: rgba(255, 255, 255, 0.62);
            font-size: 14px;
            font-weight: 400;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-link:hover {
            color: var(--neon);
            padding-left: 4px;
        }

        .cta-panel {
            position: relative;
            background: var(--navy);
            border-radius: 28px;
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(84, 240, 224, 0.2), transparent 68%);
            pointer-events: none;
        }

        .cta-panel::after {
            content: "";
            position: absolute;
            bottom: -120px;
            left: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 184, 201, 0.16), transparent 66%);
            pointer-events: none;
        }

        .scroll-mt {
            scroll-margin-top: 96px;
        }

        @media (min-width: 768px) {
            .scenario-visual img {
                min-height: 320px;
            }
        }

/* roulang page: category4 */
:root{
    --bg:#F4F9FC;
    --surface:#FFFFFF;
    --primary:#0E6D98;
    --primary-dark:#0A4C6E;
    --accent:#00B8C9;
    --neon:#54F0E0;
    --panel:#081A29;
    --text:#11283A;
    --muted:#4E6C7E;
    --line:#D9E8F0;
    --shadow-card:0 12px 30px rgba(14,109,152,.1);
    --radius-card:18px;
    --radius-btn:12px;
  }

  *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  a{text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease}
  img{max-width:100%;height:auto;display:block}
  button{font-family:inherit;cursor:pointer}
  input,select,textarea{font-family:inherit}
  h1,h2,h3{line-height:1.2;color:var(--text)}
  h1{font-size:clamp(30px,5vw,48px);font-weight:700;letter-spacing:-0.02em}
  h2{font-size:clamp(24px,3.4vw,34px);font-weight:700;letter-spacing:-0.01em}
  h3{font-size:20px;font-weight:600}

  .site-container{
    width:100%;
    max-width:1200px;
    margin-inline:auto;
    padding-inline:16px;
  }
  @media(min-width:768px){
    .site-container{padding-inline:24px}
  }

  .nav-link{
    position:relative;
    display:inline-flex;
    align-items:center;
    min-height:44px;
    padding:0 2px;
    color:rgba(255,255,255,.8);
    font-size:15px;
    font-weight:500;
    white-space:nowrap;
    transition:color .2s ease;
  }
  .nav-link:hover{color:#fff}
  .nav-link:hover::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-3px;
    width:100%;
    height:2px;
    background:var(--neon);
    box-shadow:0 0 8px rgba(84,240,224,.8);
    border-radius:999px;
  }
  .nav-link.active{
    color:var(--neon);
    text-shadow:0 0 12px rgba(84,240,224,.4);
  }
  .nav-link.active::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-3px;
    width:100%;
    height:2px;
    background:var(--neon);
    box-shadow:0 0 10px rgba(84,240,224,.6);
    border-radius:999px;
  }

  @media(min-width:1024px){
    .nav-link{padding:0 6px}
    .nav-link:hover::after,.nav-link.active::after{bottom:-6px}
  }

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    border-radius:var(--radius-btn);
    font-weight:600;
    font-size:15px;
    min-height:48px;
    padding:0 22px;
    transition:all .2s ease;
    border:1px solid transparent;
    line-height:1;
  }
  .btn-primary{background:var(--primary);color:#fff}
  .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 20px rgba(14,109,152,.18)}
  .btn-primary:active{transform:translateY(0) scale(.99)}
  .btn-outline{border:1.5px solid var(--primary);color:var(--primary);background:transparent}
  .btn-outline:hover{border-color:var(--primary-dark);background:var(--primary);color:#fff;transform:translateY(-2px)}
  .btn-outline:active{transform:translateY(0) scale(.99)}
  .btn-neon{background:var(--neon);color:#07151F;border-radius:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;transition:all .2s ease;border:1px solid transparent}
  .btn-neon:hover{background:#fff;box-shadow:0 0 16px rgba(84,240,224,.35);transform:translateY(-1px)}
  .btn-neon:active{transform:scale(.98)}

  .anchor-card{
    display:block;
    background:#fff;
    border:1px solid #E2EDF4;
    border-radius:var(--radius-card);
    box-shadow:0 8px 24px rgba(14,109,152,.08);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    position:relative;
    overflow:hidden;
  }
  .anchor-card::before{
    content:"";
    position:absolute;
    top:0;left:0;right:0;
    height:3px;
    background:linear-gradient(90deg,var(--neon),#58A6FF,transparent);
    opacity:0;
    transition:opacity .22s ease;
  }
  .anchor-card:hover::before{opacity:1}
  .anchor-card:hover{
    transform:translateY(-4px);
    border-color:#BBD7E8;
    box-shadow:0 16px 34px rgba(14,109,152,.14);
  }
  .anchor-card:focus-visible{
    outline:3px solid rgba(0,184,201,.4);
    outline-offset:2px;
  }

  .tool-item{
    background:#fff;
    border:1px solid #E2EDF4;
    border-radius:var(--radius-card);
    padding:24px;
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .tool-item:hover{
    transform:translateY(-4px);
    border-color:#BBD7E8;
    box-shadow:0 14px 30px rgba(14,109,152,.12);
  }

  .support-card{
    background:#fff;
    border:1px solid #E2EDF4;
    border-radius:var(--radius-card);
    padding:30px 26px;
    position:relative;
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .support-card:hover{
    transform:translateY(-4px);
    border-color:#BBD7E8;
    box-shadow:0 16px 30px rgba(14,109,152,.12);
  }

  details.faq-item{
    border-bottom:1px solid var(--line);
    padding:22px 2px;
  }
  details.faq-item summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    cursor:pointer;
    font-size:16px;
    font-weight:600;
    color:var(--text);
    list-style:none;
    min-height:44px;
    transition:color .2s ease;
  }
  details.faq-item summary::-webkit-details-marker{display:none}
  details.faq-item summary:hover{color:var(--primary)}
  details.faq-item[open] summary{color:var(--primary)}
  details.faq-item .faq-icon{
    flex:none;
    width:28px;
    height:28px;
    border-radius:50%;
    border:1.5px solid var(--primary);
    color:var(--primary);
    display:inline-flex;
    align-items:center;
    justify-content:center;
    font-size:18px;
    line-height:1;
    font-weight:400;
    transition:all .2s ease;
  }
  details.faq-item[open] .faq-icon{
    background:var(--primary);
    color:#fff;
    transform:rotate(45deg);
  }
  details.faq-item .answer{
    padding:12px 0 4px;
    font-size:15px;
    color:var(--muted);
    max-width:720px;
    line-height:1.8;
  }

  .footer-link{
    display:inline-flex;
    align-items:center;
    min-height:36px;
    padding:4px 0;
    color:#BFD9EA;
    font-size:14px;
    transition:color .2s ease,padding-left .2s ease;
  }
  .footer-link:hover{
    color:var(--neon);
    padding-left:6px;
  }

  @media(max-width:760px){
    .support-card{padding:24px 18px}
    .tool-item{padding:20px 16px}
  }