/* roulang page: index */
:root {
    --bg-body: #f6f9fd;
    --bg-soft: #eef4fb;
    --bg-card: #ffffff;
    --brand: #1a66d6;
    --brand-deep: #0f4a99;
    --accent: #f26b21;
    --ink: #16283c;
    --text-main: #3a4d62;
    --text-muted: #7c8fa3;
    --line: #dbe5f0;
    --outline-focus: #ffb454;
    --shadow-card: 0 8px 24px rgba(27, 72, 134, .07);
    --shadow-lift: 0 16px 36px rgba(27, 72, 134, .12);
    --radius-card: 18px;
    --radius-item: 12px;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

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

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

  button {
    font-family: inherit;
    cursor: pointer;
    border: 0;
    background: none;
  }

  ::selection {
    background: rgba(26, 102, 214, .16);
  }

  .container-site {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  @media (min-width: 768px) {
    .container-site {
      padding-left: 2rem;
      padding-right: 2rem;
    }
  }

  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  @media (min-width: 768px) {
    .section {
      padding-top: 92px;
      padding-bottom: 92px;
    }
  }

  .section-title {
    color: var(--ink);
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 680;
    line-height: 1.3;
    letter-spacing: .01em;
    margin: 0;
  }

  .section-desc {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.8;
  }

  .section-kicker {
    display: inline-flex;
    align-items: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--brand);
    letter-spacing: .12em;
  }

  .section-kicker::before {
    content: "";
    width: 22px;
    height: 2px;
    border-radius: 20px;
    background: var(--brand);
    margin-right: 10px;
  }

  .card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  }

  .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lift);
    border-color: rgba(26, 102, 214, .22);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding-left: 24px;
    padding-right: 24px;
    border-radius: var(--radius-item);
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    transition: background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .1s ease;
  }

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

  .btn:focus-visible {
    outline: 3px solid var(--outline-focus);
    outline-offset: 2px;
  }

  .btn-primary {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 8px 18px rgba(26, 102, 214, .22);
  }

  .btn-primary:hover {
    background: #1558bd;
  }

  .btn-secondary {
    background: #fff;
    color: var(--brand);
    border: 1px solid rgba(26, 102, 214, .55);
  }

  .btn-secondary:hover {
    background: var(--bg-soft);
    border-color: var(--brand);
  }

  .btn-ghost {
    background: transparent;
    color: var(--brand);
    min-height: 40px;
    padding-left: 12px;
    padding-right: 12px;
  }

  .btn-ghost:hover {
    background: var(--bg-soft);
  }

  .btn-inline{
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--brand);
    font-weight: 600;
    font-size: 15px;
    min-height: 40px;
    padding-left: 12px;
    padding-right: 12px;
  }

  .btn-inline:hover {
    color: var(--brand-deep);
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 26px;
    padding: 0 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    background: var(--bg-soft);
    color: var(--brand);
    border: 1px solid rgba(26, 102, 214, .08);
    white-space: nowrap;
  }

  .badge-orange {
    background: #fff3ec;
    color: var(--accent);
    border-color: rgba(242, 107, 33, .10);
  }

  .site-header {
    background: rgba(255, 255, 255, .86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 50;
  }

  .site-header.is-sticky {
    box-shadow: 0 2px 14px rgba(27, 72, 134, .08);
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    height: 40px;
    padding-left: 14px;
    padding-right: 14px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 540;
    color: var(--ink);
    transition: background .18s ease, color .18s ease;
  }

  .nav-link:hover {
    background: var(--bg-soft);
    color: var(--brand);
  }

  .nav-link.active {
    color: var(--brand);
    font-weight: 650;
    background: rgba(26, 102, 214, .06);
  }

  .status-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #22a06b;
    box-shadow: 0 0 0 4px rgba(34, 160, 107, .14);
  }

  .fake-logo-mark {
    width: 40px;
    height: 40px;
    border-radius: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--brand), var(--brand-deep));
    color: #fff;
    box-shadow: 0 8px 18px rgba(26, 102, 214, .24);
  }

  .hero-section {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-soft);
    background-image: linear-gradient(100deg, rgba(238, 244, 251, .98) 38%, rgba(238, 244, 251, .78) 72%, rgba(238, 244, 251, .55)),
      url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
  }

  .hero-card-info {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 24px;
    box-shadow: var(--shadow-lift);
  }

  .hero-quick-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 14px;
    border-radius: 16px;
    transition: background .18s ease, transform .18s ease;
  }

  .hero-quick-link:hover {
    background: var(--bg-soft);
    transform: translateX(4px);
  }

  .quick-icon {
    flex: 0 0 42px;
    height: 42px;
    border-radius: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
    background: rgba(26, 102, 214, .10);
  }

  .catalog-card {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 24px 22px;
    box-shadow: var(--shadow-card);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }

  .catalog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lift);
    border-color: rgba(26, 102, 214, .22);
  }

  .catalog-no {
    font-size: 15px;
    font-weight: 700;
    color: var(--brand);
    letter-spacing: .08em;
    line-height: 1;
    padding-top: 4px;
    min-width: 28px;
  }

  .catalog-title {
    color: var(--ink);
    font-size: 18px;
    font-weight: 680;
    letter-spacing: .02em;
  }

  .catalog-desc {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    margin-top: 6px;
  }

  .catalog-arrow {
    margin-left: auto;
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
    background: rgba(26, 102, 214, .08);
    transition: background .2s ease, color .2s ease, transform .2s ease;
  }

  .catalog-card:hover .catalog-arrow {
    background: var(--brand);
    color: #fff;
    transform: translateX(4px);
  }

  .post-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 16px;
    box-shadow: var(--shadow-card);
    transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  }

  .post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lift);
    border-color: rgba(26, 102, 214, .24);
  }

  .post-thumb {
    aspect-ratio: 4 / 3;
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-soft);
    border: 1px solid var(--line);
  }

  .post-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
  }

  .post-card:hover .post-thumb img {
    transform: scale(1.03);
  }

  .thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
    font-size: 15px;
    letter-spacing: .06em;
    background: linear-gradient(145deg, #eaf1fa, #e3ecf6);
  }

  .post-cat {
    display: inline-flex;
    height: 24px;
    align-items: center;
    padding: 0 9px;
    border-radius: 999px;
    font-size: 12px;
    background: rgba(26, 102, 214, .09);
    color: var(--brand);
    font-weight: 600;
  }

  .post-title {
    margin: 12px 0 0;
    font-size: 17px;
    font-weight: 640;
    line-height: 1.5;
    color: var(--ink);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

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

  .post-summary {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    margin: 8px 0 0;
    flex: 1;
  }

  .post-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
    color: var(--text-muted);
    font-size: 13px;
  }

  .read-more {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--brand);
    font-size: 14px;
    font-weight: 600;
    transition: gap .18s ease;
  }

  .read-more:hover {
    gap: 9px;
  }

  .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 52px 24px;
    background: #fff;
    border: 1px dashed var(--line);
    border-radius: 18px;
    color: var(--text-muted);
  }

  .recommend-row {
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: 68px;
    padding: 10px 16px;
    border-radius: 14px;
    transition: background .18s ease, transform .18s ease;
  }

  .recommend-row:hover {
    background: var(--bg-soft);
    transform: translateX(3px);
  }

  .feature-split-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform .24s ease, box-shadow .24s ease;
  }

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

  .feature-split-card img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
  }

  .step-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 26px 24px;
    box-shadow: var(--shadow-card);
    height: 100%;
  }

  .step-num {
    font-size: 24px;
    font-weight: 760;
    color: rgba(26, 102, 214, .18);
    line-height: 1;
    letter-spacing: -.02em;
  }

  .faq-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 0 0;
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: border-color .2s ease, box-shadow .2s ease;
  }

  .faq-card[open] {
    border-color: rgba(26, 102, 214, .32);
    box-shadow: var(--shadow-lift);
  }

  .faq-card summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
    font-size: 16px;
    font-weight: 620;
    color: var(--ink);
  }

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

  .faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: rgba(26, 102, 214, .10);
    color: var(--brand);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    transition: transform .2s ease, background .2s ease, color .2s ease;
  }

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

  .faq-body {
    padding: 0 20px 20px 54px;
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.8;
  }

  .cta-panel {
    background: linear-gradient(135deg, var(--brand-deep), #0d3f7d);
    border-radius: 28px;
    color: #fff;
    padding: 52px 28px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 24px 52px rgba(15, 74, 153, .22);
  }

  @media (min-width: 768px) {
    .cta-panel {
      padding: 64px 56px;
    }
  }

  .cta-panel::after {
    content: "";
    position: absolute;
    right: -70px;
    top: -70px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .05);
  }

  .site-footer {
    background: #0b1f33;
    color: #b9c5d6;
  }

  .footer-title {
    color: #fff;
    font-size: 16px;
    font-weight: 640;
    margin-bottom: 14px;
  }

  .footer-link {
    display: inline-flex;
    align-items: center;
    color: #b9c5d6;
    font-size: 14px;
    padding: 5px 0;
    transition: color .16s ease;
  }

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

  .focus\:ring-visible:focus-visible {
    outline: 3px solid var(--outline-focus);
    outline-offset: 3px;
  }

  @media (max-width: 767px) {
    .container-site {
      padding-left: 18px;
      padding-right: 18px;
    }
  }

/* roulang page: article */
:root {
            --bg-body: #f6f9fd;
            --bg-soft: #eef4fb;
            --bg-card: #ffffff;
            --brand: #1a66d6;
            --brand-deep: #0f4a99;
            --accent: #f26b21;
            --ink: #16283c;
            --text-main: #3a4d62;
            --text-muted: #7c8fa3;
            --line: #dbe5f0;
            --outline-focus: #ffb454;
            --shadow-card: 0 8px 24px rgba(27, 72, 134, .07);
            --shadow-lift: 0 16px 36px rgba(27, 72, 134, .12);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: PingFang SC, Hiragino Sans GB, Microsoft YaHei, Noto Sans CJK SC, sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }
        img {
            display: block;
            max-width: 100%;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        ul,
        ol {
            padding-left: 0;
        }
        h1,
        h2,
        h3 {
            color: var(--ink);
            margin: 0;
        }
        p {
            margin: 0;
        }
        :focus-visible {
            outline: 3px solid var(--outline-focus);
            outline-offset: 2px;
            border-radius: 8px;
        }
        .container-site {
            width: min(1240px, calc(100% - 40px));
            margin-inline: auto;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .2s ease;
        }
        .site-header.is-shadow {
            box-shadow: 0 6px 18px rgba(27, 72, 134, .06);
        }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: #eaf1fb;
            color: var(--brand);
            border: 1px solid #d7e5f7;
        }
        .fake-logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: #eaf1fb;
            color: var(--brand);
            border: 1px solid #d7e5f7;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 15px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 540;
            color: var(--text-main);
            transition: background .18s ease, color .18s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            background: var(--bg-soft);
            color: var(--brand);
        }
        .nav-link.active {
            color: var(--brand);
            background: rgba(26, 102, 214, .08);
            font-weight: 600;
        }
        .status-dot {
            width: 7px;
            height: 7px;
            border-radius: 999px;
            background: #31b77e;
            display: inline-block;
            box-shadow: 0 0 0 4px rgba(49, 183, 126, .12);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            font-weight: 600;
            border: 1px solid transparent;
            transition: transform .15s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
            line-height: 1;
        }
        .btn:active {
            transform: scale(.98);
        }
        .btn-primary {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 6px 18px rgba(26, 102, 214, .18);
        }
        .btn-primary:hover {
            background: var(--brand-deep);
        }
        .btn-secondary {
            background: #fff;
            color: var(--brand);
            border-color: rgba(26, 102, 214, .35);
        }
        .btn-secondary:hover {
            background: var(--bg-soft);
            border-color: var(--brand);
        }
        .btn-none {
            background: transparent;
            color: var(--brand);
            border-color: transparent;
        }
        .article-hero {
            background: linear-gradient(90deg, rgba(238, 244, 251, .96) 0%, rgba(244, 248, 253, .88) 55%, rgba(248, 251, 255, .76) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid var(--line);
        }
        .meta-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(26, 102, 214, .09);
            color: var(--brand);
            font-size: 13px;
            font-weight: 600;
            padding: 7px 13px;
            border-radius: 999px;
            border: 1px solid rgba(26, 102, 214, .12);
        }
        .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 99px;
            display: inline-block;
            background: #b1c1d4;
            margin: 0 12px;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-main);
        }
        .breadcrumb a:hover {
            color: var(--brand);
        }
        .breadcrumb-sep {
            color: #b7c5d7;
        }
        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: 18px;
            box-shadow: var(--shadow-card);
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lift);
        }
        .rich-text {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-main);
            overflow-wrap: break-word;
            word-break: break-word;
        }
        .rich-text blockquote,
        .rich-text p,
        .rich-text ul,
        .rich-text ol,
        .rich-text figure,
        .rich-text pre,
        .rich-text table {
            margin-bottom: 24px;
        }
        .rich-text h2 {
            font-size: 23px;
            font-weight: 700;
            color: var(--ink);
            margin-top: 38px;
            margin-bottom: 16px;
            letter-spacing: -.02em;
        }
        .rich-text h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-top: 28px;
            margin-bottom: 12px;
        }
        .rich-text a {
            color: var(--brand);
            font-weight: 500;
            border-bottom: 1px solid rgba(26, 102, 214, .25);
        }
        .rich-text a:hover {
            border-bottom-color: var(--brand);
        }
        .rich-text blockquote {
            background: var(--bg-soft);
            border-left: 4px solid var(--brand);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            color: var(--ink);
        }
        .rich-text img {
            border-radius: 12px;
            margin: 22px 0;
            width: 100%;
            height: auto;
            object-fit: cover;
            border: 1px solid var(--line);
        }
        .rich-text ul {
            padding-left: 24px;
            list-style: disc;
        }
        .rich-text ol {
            padding-left: 24px;
            list-style: decimal;
        }
        .rich-text li {
            padding-left: 8px;
            margin-bottom: 8px;
        }
        .rich-text table {
            width: 100%;
            border-collapse: collapse;
            overflow-x: auto;
            display: block;
            max-width: 100%;
        }
        .rich-text th,
        .rich-text td {
            border: 1px solid var(--line);
            padding: 10px 14px;
            text-align: left;
        }
        .rich-text code {
            background: var(--bg-soft);
            color: var(--brand-deep);
            font-size: 15px;
            border-radius: 6px;
            padding: 2px 7px;
        }
        .empty-block {
            background: #fff;
            border: 1px dashed #c7d6e8;
            border-radius: 18px;
            padding: 70px 24px;
            text-align: center;
        }
        .site-footer {
            background: #0b1f33;
            color: #c6d4e4;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }
        .footer-link {
            display: inline-block;
            padding: 7px 0;
            font-size: 14px;
            color: #aec0d4;
            transition: color .18s ease;
        }
        .footer-link:hover {
            color: #fff;
        }
        .mobile-nav {
            position: fixed;
            inset: 0;
            z-index: 80;
            background: rgba(246, 249, 253, .98);
            backdrop-filter: blur(10px);
            display: none;
            opacity: 0;
            transition: opacity .18s ease;
        }
        body.menu-open {
            overflow: hidden;
        }
        body.menu-open .mobile-nav {
            display: flex;
            opacity: 1;
        }
        @media (max-width: 1023px) {
            .mobile-nav-inner {
                display: flex;
                flex-direction: column;
                height: 100%;
                width: min(480px, calc(100% - 40px));
                margin-left: auto;
                background: #fff;
                border-left: 1px solid var(--line);
                padding: 18px;
                box-shadow: -10px 0 40px rgba(27, 72, 134, .08);
                overflow-y: auto;
            }
        }
        @media (max-width: 640px) {
            .container-site {
                width: min(100% - 28px, 1240px);
            }
            .header-meta-panel {
                display: none;
            }
            .article-empty {
                padding: 46px 18px;
            }
        }

/* roulang page: category1 */
:root {
    --bg-body: #f6f9fd;
    --bg-soft: #eef4fb;
    --bg-card: #ffffff;
    --brand: #1a66d6;
    --brand-deep: #0f4a99;
    --accent: #f26b21;
    --ink: #16283c;
    --text-main: #3a4d62;
    --text-muted: #7c8fa3;
    --line: #dbe5f0;
    --outline-focus: #ffb454;
    --shadow-card: 0 8px 24px rgba(27, 72, 134, .07);
    --shadow-lift: 0 16px 36px rgba(27, 72, 134, .12);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--bg-body);
    color: var(--text-main);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    font-size: 15px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button,
  input {
    font-family: inherit;
  }

  .container-site {
    width: min(100% - 2rem, 1200px);
    margin-inline: auto;
  }

  .logo-mark {
    display: inline-flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    color: #fff;
    background: var(--brand);
    box-shadow: 0 6px 16px rgba(26, 102, 214, .22);
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 1px 8px rgba(27, 72, 134, .04);
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    height: 40px;
    padding: 0 16px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 540;
    color: var(--text-main);
    transition: all .2s ease;
  }

  .nav-link:hover {
    background: var(--bg-soft);
    color: var(--brand);
  }

  .nav-link:focus-visible,
  .btn:focus-visible,
  .footer-link:focus-visible,
  .mobile-link:focus-visible {
    outline: 3px solid var(--outline-focus);
    outline-offset: 2px;
  }

  .nav-link.active {
    background: var(--bg-soft);
    color: var(--brand);
    font-weight: 600;
  }

  .status-dot {
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: #22b573;
    box-shadow: 0 0 0 4px rgba(34, 181, 115, .14);
    position: relative;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-weight: 600;
    line-height: 1;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .2s ease;
    white-space: nowrap;
  }

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

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

  .btn-primary {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 6px 14px rgba(26, 102, 214, .18);
  }

  .btn-primary:hover {
    background: #1558bb;
    box-shadow: 0 10px 20px rgba(26, 102, 214, .26);
  }

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

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

  .btn-light {
    background: #fff;
    color: var(--brand-deep);
  }

  .btn-light:hover {
    background: #f4f8fe;
  }

  .tag-soft {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 999px;
    background: var(--bg-soft);
    color: var(--brand);
    font-size: 13px;
  }

  .tag-hot {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 999px;
    background: #fff2e8;
    color: var(--accent);
    font-size: 13px;
  }

  .card-lift {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow-card);
    transition: transform .2s ease, box-shadow .2s ease;
  }

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

  .hero-space {
    position: relative;
    background:
      linear-gradient(100deg, rgba(246, 249, 253, .94) 0%, rgba(246, 249, 253, .86) 38%, rgba(238, 244, 251, .44) 100%),
      url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  }

  .hero-space:after {
    content: "";
    pointer-events: none;
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, rgba(246, 249, 253, .9) 0%, rgba(238, 244, 251, .28) 82%, rgba(238, 244, 251, .1) 100%);
  }

  .hero-space>* {
    position: relative;
    z-index: 2;
  }

  .index-num {
    font-size: 22px;
    font-weight: 800;
    line-height: 1;
    color: var(--brand);
    opacity: .75;
    letter-spacing: .03em;
  }

  .catalog-row {
    display: grid;
    grid-template-columns: 46px 1fr auto;
    gap: 20px;
    align-items: center;
    padding: 22px 24px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow-card);
    transition: all .2s ease;
  }

  .catalog-row:hover {
    box-shadow: var(--shadow-lift);
    transform: translateY(-2px);
    border-color: #bcd2ec;
  }

  .step-icon {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--bg-soft);
    color: var(--brand);
    font-size: 18px;
    font-weight: 700;
  }

  .cover-wrap {
    overflow: hidden;
    border-radius: 18px 18px 0 0;
  }

  .cover-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
  }

  .article-card:hover .cover-wrap img {
    transform: scale(1.02);
  }

  .article-card .go-text {
    color: var(--text-muted);
    transition: color .2s ease;
  }

  .article-card:hover .go-text {
    color: var(--brand);
  }

  .reco-row {
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 68px;
    padding: 0 20px;
    border-radius: 14px;
    border: 1px solid transparent;
    transition: all .2s ease;
  }

  .reco-row:hover {
    background: var(--bg-soft);
    border-color: var(--line);
  }

  .reco-row:hover .arrow-mark {
    color: var(--brand);
  }

  .arrow-mark {
    margin-left: auto;
    color: #b6c5d6;
    transition: color .2s ease;
  }

  .section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 36px;
  }

  .section-kicker {
    display: block;
    font-size: 13px;
    letter-spacing: .18em;
    color: var(--brand);
    font-weight: 600;
    margin-bottom: 8px;
  }

  .site-footer {
    background: #0b1f33;
    color: #c5d4e4;
  }

  .footer-title {
    color: #fff;
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 14px;
  }

  .footer-link {
    color: #9db0c6;
    font-size: 14px;
    transition: color .2s ease;
  }

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

  .fake-logo-mark {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    border-radius: 13px;
    background: #fff;
    color: var(--brand);
  }

  .footer .fake-logo-mark {
    background: rgba(255, 255, 255, .09);
  }

  .faq-box {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 0;
  }

  .faq-box details {
    padding: 18px 24px;
    border-bottom: 1px solid var(--line);
  }

  .faq-box details:last-child {
    border-bottom: 0;
  }

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

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

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

  .faq-box summary:focus-visible {
    outline: 3px solid var(--outline-focus);
    outline-offset: 4px;
    border-radius: 8px;
  }

  .faq-box summary:after {
    content: "+";
    font-size: 24px;
    line-height: 1;
    color: var(--brand);
    transition: transform .2s ease;
  }

  .faq-box details[open] summary:after {
    transform: rotate(45deg);
  }

  .faq-box .faq-answer {
    color: var(--text-main);
    font-size: 14px;
    line-height: 1.8;
    padding-top: 12px;
  }

  @media (max-width: 1023px) {
    .catalog-row {
      grid-template-columns: 40px 1fr;
      padding: 18px 18px;
    }

    .catalog-row .catalog-arrow {
      display: none;
    }
  }

  @media (max-width: 640px) {
    .container-site {
      width: min(100% - 1.25rem, 1200px);
    }

    .section-head {
      margin-bottom: 24px;
    }

    .catalog-row {
      grid-template-columns: 1fr;
      gap: 8px;
      padding: 18px;
    }

    .index-num {
      font-size: 18px;
    }

    .faq-box details {
      padding: 16px 18px;
    }
  }

/* roulang page: category2 */
:root{
  --bg-body:#f6f9fd;
  --bg-soft:#eef4fb;
  --bg-card:#ffffff;
  --brand:#1a66d6;
  --brand-deep:#0f4a99;
  --accent:#f26b21;
  --ink:#16283c;
  --text-main:#3a4d62;
  --text-muted:#7c8fa3;
  --line:#dbe5f0;
  --outline-focus:#ffb454;
  --shadow-card:0 8px 24px rgba(27,72,134,.07);
  --shadow-lift:0 16px 36px rgba(27,72,134,.12);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-body);
  color:var(--text-main);
  font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans CJK SC,sans-serif;
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
button{font:inherit;}
ul,ol{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,p,figure{margin:0;}
.container-site{max-width:1200px;margin-inline:auto;padding-inline:20px;}
@media(min-width:768px){.container-site{padding-inline:32px;}}
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header.is-sticky{box-shadow:0 2px 16px rgba(27,72,134,.05);}
.fake-logo-mark{width:38px;height:38px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;color:#fff;background:linear-gradient(145deg,var(--brand),var(--brand-deep));box-shadow:0 6px 14px rgba(26,102,214,.24);}
.nav-link{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  border-radius:10px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:var(--text-main);
  transition:background .2s,color .2s;
}
.nav-link:hover{background:var(--bg-soft);color:var(--brand);}
.nav-link.active{color:var(--brand);background:var(--bg-soft);font-weight:650;}
.status-dot{display:inline-block;width:8px;height:8px;border-radius:999px;background:#25b46b;box-shadow:0 0 0 4px rgba(37,180,107,.14);}
.status-dot.is-pulse{animation:pulseDot 2s infinite;transform-origin:center;}
@keyframes pulseDot{0%{box-shadow:0 0 0 0 rgba(37,180,107,.32);}70%{box-shadow:0 0 0 6px rgba(37,180,107,0);}100%{box-shadow:0 0 0 0 rgba(37,180,107,0);}}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:12px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .2s,border-color .2s,color .2s,transform .1s,box-shadow .2s;
}
.btn:active{transform:scale(.98);}
.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,button:focus-visible{
  outline:3px solid var(--outline-focus);
  outline-offset:2px;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(26,102,214,.24);}
.btn-primary:hover{background:#1759bd;box-shadow:0 10px 22px rgba(26,102,214,.28);}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand);}
.btn-outline:hover{background:var(--bg-soft);}
.btn-dark{background:var(--brand-deep);color:#fff;}
.btn-dark:hover{background:#0d3d7c;}
.btn-light{background:#fff;color:var(--brand-deep);border-color:rgba(255,255,255,.5);}
.btn-light:hover{background:#f0f6ff;}
.mobile-menu{
  position:fixed;
  inset:0;
  z-index:80;
  background:rgba(246,249,253,.96);
  backdrop-filter:blur(10px);
  overflow-y:auto;
}
.mobile-menu.hidden{display:none;}
.mobile-panel{min-height:100vh;padding-bottom:48px;}
.section-space{padding-block:72px;}
@media(min-width:768px){.section-space{padding-block:96px;}}
.hero-bgimg{position:absolute;inset:0;background-size:cover;background-position:center;}
.hero-mask{position:absolute;inset:0;background:linear-gradient(105deg,rgba(246,249,253,.98) 2%,rgba(246,249,253,.9) 38%,rgba(230,240,252,.35) 100%);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.12em;
  font-weight:650;
  color:var(--brand);
  background:#fff;
  border:1px solid var(--line);
  border-radius:999px;
  padding:6px 14px;
}
.hero-title{font-size:clamp(30px,5vw,46px);font-weight:720;line-height:1.18;color:var(--ink);letter-spacing:.01em;}
.hero-lead{font-size:clamp(15px,1.8vw,18px);line-height:1.9;color:var(--text-main);max-width:640px;}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--brand);
  background:rgba(26,102,214,.08);
  border-radius:999px;
  padding:6px 13px;
}
.hero-card{
  border-radius:22px;
  background:#fff;
  border:1px solid var(--line);
  box-shadow:var(--shadow-lift);
}
.hero-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.entry-item{display:block;border:1px solid var(--line);border-radius:14px;padding:14px 16px;transition:border-color .2s,transform .2s,box-shadow .2s,background .2s;}
.entry-item:hover{border-color:var(--brand);background:var(--bg-soft);transform:translateY(-2px);}
.entry-icon{
  width:38px;height:38px;border-radius:12px;
  background:var(--bg-soft);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}
.crumb-wrap{background:#fff;border-bottom:1px solid var(--line);}
.crumb{font-size:13px;color:var(--text-muted);}
.crumb a{transition:color .2s;}
.crumb a:hover{color:var(--brand);}
.crumb .sep{margin:0 8px;color:#c7d3e1;}
.section-head{max-width:760px;}
.section-head .overline{
  display:inline-block;
  font-size:13px;
  font-weight:650;
  letter-spacing:.1em;
  color:var(--brand);
  background:var(--bg-soft);
  padding:5px 14px;
  border-radius:999px;
}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:680;color:var(--ink);line-height:1.28;}
.section-head .desc{font-size:15px;color:var(--text-main);line-height:1.8;margin-top:10px;}
.step-card{
  position:relative;
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:18px;
  padding:24px 22px;
  box-shadow:var(--shadow-card);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:#c8dbef;}
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;height:42px;
  border-radius:14px;
  background:var(--brand);
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:16px;
  box-shadow:0 8px 16px rgba(26,102,214,.20);
}
.step-card h3{font-size:17px;font-weight:650;color:var(--ink);}
.step-card p{font-size:14px;line-height:1.85;margin-top:8px;}
.step-more{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:600;color:var(--brand);margin-top:14px;}
.step-more:hover{color:var(--brand-deep);}
.tag{display:inline-flex;align-items:center;gap:5px;font-size:13px;border-radius:999px;padding:5px 12px;line-height:1.6;}
.tag-blue{background:rgba(26,102,214,.09);color:var(--brand);}
.tag-orange{background:rgba(242,107,33,.12);color:#d45613;}
.tag-gray{background:#eef1f6;color:var(--text-muted);}
.scene-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--shadow-card);
}
.scene-row{display:flex;align-items:flex-start;gap:16px;padding:18px 22px;}
.scene-row+.scene-row{border-top:1px dashed var(--line);}
.scene-row:hover{background:var(--bg-soft);}
.scene-index{font-size:14px;font-weight:700;color:var(--brand);min-width:30px;}
.scene-copy h3{font-size:16px;font-weight:650;color:var(--ink);}
.scene-copy p{font-size:14px;color:var(--text-main);margin-top:4px;line-height:1.8;}
.media-card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-card);overflow:hidden;transition:transform .2s,box-shadow .2s;}
.media-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);}
.photo-ratio{aspect-ratio:4/3;overflow:hidden;background:var(--bg-soft);}
.photo-ratio img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.media-card:hover .photo-ratio img{transform:scale(1.02);}
.media-body{padding:22px;}
.media-body h3{font-size:18px;font-weight:650;color:var(--ink);line-height:1.5;}
.media-body p{font-size:14px;color:var(--text-main);margin-top:8px;line-height:1.85;}
.check-list{margin-top:14px;display:grid;gap:9px;}
.check-list li{display:flex;gap:9px;font-size:14px;line-height:1.7;color:var(--text-main);}
.check-list li::before{content:"";display:inline-block;width:7px;height:7px;border-radius:99px;background:var(--brand);flex:0 0 auto;margin-top:9px;}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  padding:0 22px;
  margin-bottom:14px;
  transition:box-shadow .2s,border-color .2s;
}
.faq-item[open]{box-shadow:var(--shadow-card);border-color:#c9dced;}
.faq-question{
  list-style:none;
  display:flex;
  align-items:center;
  gap:12px;
  cursor:pointer;
  font-size:16px;
  font-weight:650;
  color:var(--ink);
  padding:18px 0;
  transition:color .2s;
}
.faq-question::-webkit-details-marker{display:none;}
.faq-question:hover{color:var(--brand);}
.faq-question .faq-mark{width:28px;height:28px;border-radius:10px;background:var(--bg-soft);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;font-weight:700;transition:background .2s,color .2s;}
.faq-item[open] .faq-mark{background:var(--brand);color:#fff;}
.faq-answer{padding:0 0 20px 40px;font-size:14px;color:var(--text-main);line-height:1.9;}
.cta-panel{
  background:linear-gradient(135deg,var(--brand-deep),#0c3d79);
  border-radius:26px;
  padding:34px;
  color:#fff;
}
@media(min-width:768px){.cta-panel{padding:44px;}}
.cta-panel h2{font-size:clamp(23px,2.6vw,30px);font-weight:680;color:#fff;}
.cta-panel p{color:#c8d9ef;font-size:14px;line-height:1.9;}
.sub-input{
  width:100%;
  height:48px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.35);
  background:rgba(255,255,255,.16);
  color:#fff;
  padding:0 16px;
  font-size:14px;
  outline:none;
  transition:background .2s,border-color .2s;
}
.sub-input::placeholder{color:#bfd3ea;}
.sub-input:focus{background:#fff;color:var(--ink);border-color:#fff;}
.site-footer{
  background:#0b1f33;
  color:#9db0c6;
  font-size:14px;
}
.footer-title{color:#fff;font-size:15px;font-weight:650;margin-bottom:14px;}
.footer-link{display:inline-block;padding:5px 0;font-size:14px;color:#9db0c6;transition:color .2s,transform .2s;}
.footer-link:hover{color:#fff;transform:translateX(3px);}
.focus-visible\:outline-2:focus-visible{outline:2px solid var(--outline-focus);outline-offset:2px;}
@media(max-width:767px){
  .hero-mask{background:linear-gradient(180deg,rgba(246,249,253,.98),rgba(246,249,253,.88) 60%,rgba(246,249,253,.55));}
  .scene-row{padding:16px 14px;}
}