/* roulang page: index */
:root {
      --bg: #0d1117;
      --bg-soft: #111827;
      --surface: #151c28;
      --surface-2: #1b2433;
      --line: rgba(255, 255, 255, 0.08);
      --text: #f4f7fb;
      --muted: #a7b3c7;
      --muted-2: #7f8ca4;
      --brand: #ff6b35;
      --brand-2: #ffb347;
      --accent: #2dd4bf;
      --good: #4ade80;
      --shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
      --radius: 16px;
      --radius-sm: 12px;
      --radius-xs: 10px;
      --container: 1180px;
      --gap: 24px;
      --gap-sm: 14px;
      --transition: 180ms ease;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(255, 107, 53, 0.14), transparent 28%),
        radial-gradient(circle at top right, rgba(45, 212, 191, 0.12), transparent 24%),
        linear-gradient(180deg, #0b0f16 0%, #101624 46%, #0d1117 100%);
    }
    img { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    button, input, textarea, select { font: inherit; }
    button { cursor: pointer; border: 0; }
    ::selection { background: rgba(255, 107, 53, 0.28); color: #fff; }

    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }

    .skip-link {
      position: absolute;
      left: 12px;
      top: -40px;
      padding: 10px 14px;
      background: var(--brand);
      color: #fff;
      border-radius: 10px;
      z-index: 1000;
      transition: top var(--transition);
    }
    .skip-link:focus { top: 12px; }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 80;
      backdrop-filter: blur(16px);
      background: rgba(10, 14, 22, 0.76);
      border-bottom: 1px solid var(--line);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 74px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: 0;
      white-space: nowrap;
    }
    .brand-mark {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--brand), var(--brand-2));
      color: #141414;
      font-weight: 900;
      box-shadow: 0 10px 24px rgba(255, 107, 53, 0.28);
    }
    .brand-text { font-size: 1rem; }

    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text);
      border: 1px solid var(--line);
    }
    .nav-toggle:focus-visible,
    .nav a:focus-visible,
    .btn:focus-visible,
    .search-input:focus-visible,
    .faq-btn:focus-visible {
      outline: 2px solid rgba(255, 179, 71, 0.72);
      outline-offset: 2px;
    }

    .nav {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    .nav a {
      padding: 10px 14px;
      border-radius: 999px;
      color: var(--muted);
      transition: background var(--transition), color var(--transition), transform var(--transition);
    }
    .nav a:hover,
    .nav a.active {
      color: #fff;
      background: rgba(255, 255, 255, 0.06);
    }

    .hero {
      position: relative;
      overflow: hidden;
      padding: 34px 0 18px;
    }
    .hero-panel {
      position: relative;
      min-height: 560px;
      border: 1px solid var(--line);
      border-radius: 24px;
      overflow: hidden;
      background:
        linear-gradient(90deg, rgba(8, 12, 20, 0.92) 0%, rgba(8, 12, 20, 0.58) 55%, rgba(8, 12, 20, 0.26) 100%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      box-shadow: var(--shadow);
    }
    .hero-content {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
      gap: 28px;
      align-items: end;
      min-height: 560px;
      padding: 42px;
    }
    .hero-copy {
      max-width: 680px;
      padding-bottom: 16px;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.1);
      font-size: 0.92rem;
      margin-bottom: 16px;
    }
    .hero h1 {
      margin: 0;
      font-size: clamp(2rem, 3.4vw, 4rem);
      line-height: 1.12;
      letter-spacing: 0;
      max-width: 12ch;
    }
    .hero p {
      margin: 18px 0 0;
      font-size: 1.05rem;
      color: rgba(244, 247, 251, 0.88);
      max-width: 62ch;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 26px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 0 18px;
      border-radius: 12px;
      transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
      border: 1px solid transparent;
      font-weight: 700;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary {
      background: linear-gradient(135deg, var(--brand), var(--brand-2));
      color: #121212;
      box-shadow: 0 14px 28px rgba(255, 107, 53, 0.28);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text);
      border-color: var(--line);
    }
    .btn-ghost {
      background: transparent;
      color: var(--muted);
      border-color: var(--line);
    }

    .hero-aside {
      display: grid;
      gap: 14px;
      align-self: stretch;
    }
    .stat-strip, .signal-card {
      border-radius: var(--radius);
      background: rgba(17, 23, 35, 0.84);
      border: 1px solid var(--line);
      backdrop-filter: blur(10px);
    }
    .stat-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      padding: 16px;
    }
    .stat {
      padding: 14px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }
    .stat strong {
      display: block;
      font-size: 1.4rem;
      line-height: 1.1;
      color: #fff;
    }
    .stat span {
      display: block;
      margin-top: 6px;
      color: var(--muted);
      font-size: 0.92rem;
    }
    .signal-card {
      padding: 16px;
      display: grid;
      gap: 12px;
      align-content: start;
    }
    .signal-card img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-radius: 14px;
    }
    .signal-card h2 {
      margin: 0;
      font-size: 1.2rem;
    }
    .signal-card p {
      margin: 0;
      color: var(--muted);
      font-size: 0.96rem;
    }
    .badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 30px;
      padding: 0 11px;
      border-radius: 999px;
      background: rgba(45, 212, 191, 0.12);
      color: #b7fff2;
      border: 1px solid rgba(45, 212, 191, 0.16);
      font-size: 0.88rem;
      white-space: nowrap;
    }

    .band {
      padding: 26px 0;
    }
    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 18px;
      margin-bottom: 18px;
    }
    .section-head h2 {
      margin: 0;
      font-size: 1.56rem;
      line-height: 1.2;
    }
    .section-head p {
      margin: 0;
      color: var(--muted);
      max-width: 60ch;
    }

    .quick-grid {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: var(--gap);
    }
    .tile, .panel, .article-card, .faq-item, .search-box, .cta-panel {
      border: 1px solid var(--line);
      background: rgba(17, 23, 35, 0.82);
      border-radius: var(--radius);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
    }
    .tile {
      padding: 18px;
      min-height: 160px;
    }
    .tile h3, .panel h3, .cta-panel h3 { margin: 0; }
    .tile p, .panel p, .cta-panel p { color: var(--muted); }
    .tile small { color: var(--muted-2); }
    .tile.media {
      grid-column: span 7;
      display: grid;
      gap: 16px;
      overflow: hidden;
      background:
        linear-gradient(135deg, rgba(17, 23, 35, 0.82), rgba(17, 23, 35, 0.68)),
        url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
    }
    .tile.media .tagline {
      display: inline-flex;
      width: fit-content;
      padding: 6px 10px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      color: #fff;
      font-size: 0.88rem;
    }
    .tile.media ul {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
      color: #e7edf8;
    }
    .tile.media li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }
    .dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--brand);
      margin-top: 0.58em;
      flex: 0 0 auto;
      box-shadow: 0 0 0 6px rgba(255, 107, 53, 0.12);
    }
    .tile.stack {
      grid-column: span 5;
      display: grid;
      gap: 12px;
    }
    .stack-list {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .stack-list li {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 14px;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text);
    }
    .stack-list span { color: var(--muted); }

    .search-box {
      padding: 18px;
      display: grid;
      gap: 14px;
    }
    .search-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 10px;
    }
    .search-input {
      width: 100%;
      min-height: 48px;
      border-radius: 12px;
      padding: 0 14px;
      background: #0f1622;
      color: var(--text);
      border: 1px solid var(--line);
      outline: none;
    }
    .search-input::placeholder { color: #7a879c; }
    .search-help {
      color: var(--muted);
      font-size: 0.94rem;
    }

    .list-shell {
      display: grid;
      gap: 16px;
    }
    .list-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
    }
    .article-card {
      overflow: hidden;
      display: grid;
      grid-template-columns: 180px minmax(0, 1fr);
      min-height: 194px;
      transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }
    .article-card:hover {
      transform: translateY(-2px);
      border-color: rgba(255, 179, 71, 0.34);
      box-shadow: 0 16px 34px rgba(0, 0, 0, 0.24);
    }
    .article-thumb {
      position: relative;
      overflow: hidden;
      min-height: 100%;
      background: #0f1622;
    }
    .article-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .article-body {
      padding: 18px;
      display: grid;
      gap: 12px;
      align-content: start;
    }
    .meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      color: var(--muted-2);
      font-size: 0.9rem;
    }
    .article-body h3 {
      margin: 0;
      font-size: 1.08rem;
      line-height: 1.38;
    }
    .article-body p {
      margin: 0;
      color: var(--muted);
      font-size: 0.96rem;
    }
    .more-link {
      justify-self: start;
      color: #ffd3bf;
      font-weight: 700;
    }

    .panel {
      padding: 20px;
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }
    .feature {
      padding: 18px;
      border-radius: var(--radius-sm);
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.05);
      min-height: 170px;
    }
    .feature img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      border-radius: 14px;
      margin-bottom: 14px;
    }
    .feature h3 { margin: 0 0 10px; font-size: 1.08rem; }
    .feature p { margin: 0; color: var(--muted); }

    .faq-list {
      display: grid;
      gap: 12px;
    }
    .faq-item {
      overflow: hidden;
    }
    .faq-btn {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 16px 18px;
      background: transparent;
      color: var(--text);
      text-align: left;
      font-weight: 700;
    }
    .faq-btn span { color: var(--muted); font-weight: 500; }
    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--muted);
    }
    .faq-item.open .faq-answer { display: block; }
    .faq-item.open .chev { transform: rotate(180deg); }
    .chev { transition: transform var(--transition); color: var(--brand-2); }

    .cta-panel {
      padding: 24px;
      background:
        linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(45, 212, 191, 0.08)),
        rgba(17, 23, 35, 0.82);
    }
    .cta-inner {
      display: grid;
      grid-template-columns: 1.3fr 0.7fr;
      gap: 18px;
      align-items: center;
    }
    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: flex-end;
    }

    .site-footer {
      padding: 28px 0 36px;
      border-top: 1px solid var(--line);
      margin-top: 10px;
      color: var(--muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 1fr;
      gap: 20px;
      align-items: start;
    }
    .footer-col h3 {
      margin: 0 0 12px;
      color: var(--text);
      font-size: 1.02rem;
    }
    .footer-links {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .footer-links a {
      color: var(--muted);
    }
    .footer-links a:hover { color: #fff; }
    .footer-note { margin-top: 18px; font-size: 0.92rem; color: var(--muted-2); }

    .section-spacer { height: 8px; }

    @media (max-width: 1080px) {
      .hero-content { grid-template-columns: 1fr; align-items: start; }
      .hero-panel { min-height: auto; }
      .hero-copy { max-width: none; }
      .hero-aside { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .tile.media, .tile.stack { grid-column: span 12; }
      .quick-grid { gap: 18px; }
      .list-grid { grid-template-columns: 1fr; }
      .feature-grid { grid-template-columns: 1fr; }
      .cta-inner, .footer-grid { grid-template-columns: 1fr; }
      .cta-actions { justify-content: flex-start; }
    }

    @media (max-width: 768px) {
      .header-inner { min-height: 64px; }
      .nav-toggle { display: inline-flex; }
      .nav {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 70px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 16px;
        background: rgba(10, 14, 22, 0.96);
        box-shadow: var(--shadow);
      }
      .nav.open { display: flex; }
      .nav a { width: 100%; }
      .hero { padding-top: 18px; }
      .hero-panel { border-radius: 20px; }
      .hero-content { padding: 22px; }
      .hero-aside { grid-template-columns: 1fr; }
      .stat-strip { grid-template-columns: 1fr; }
      .section-head { flex-direction: column; align-items: start; }
      .tile.media, .tile.stack { grid-column: span 12; }
      .article-card { grid-template-columns: 1fr; }
      .article-thumb { aspect-ratio: 16 / 9; }
      .search-row { grid-template-columns: 1fr; }
      .search-row .btn { width: 100%; }
      .feature-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 520px) {
      .container { width: min(100% - 20px, var(--container)); }
      .hero h1 { max-width: 100%; }
      .hero p { font-size: 0.98rem; }
      .btn { width: 100%; }
      .hero-actions { display: grid; }
      .badge-row { gap: 6px; }
      .badge { font-size: 0.84rem; }
      .tile, .panel, .search-box, .cta-panel, .article-body, .faq-btn, .faq-answer { padding-left: 14px; padding-right: 14px; }
    }

/* roulang page: article */
:root {
      --bg: #0d1117;
      --bg-soft: #111827;
      --surface: #151c28;
      --surface-2: #1b2433;
      --line: rgba(255, 255, 255, 0.08);
      --text: #f4f7fb;
      --muted: #a7b3c7;
      --muted-2: #7f8ca4;
      --brand: #ff6b35;
      --brand-2: #ffb347;
      --accent: #2dd4bf;
      --good: #4ade80;
      --shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
      --radius: 16px;
      --radius-sm: 12px;
      --radius-xs: 10px;
      --container: 1180px;
      --gap: 24px;
      --gap-sm: 14px;
      --transition: 180ms ease;
    }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(255, 107, 53, 0.12), transparent 28%),
        radial-gradient(circle at top right, rgba(45, 212, 191, 0.10), transparent 24%),
        linear-gradient(180deg, #0b0f16 0%, #101624 46%, #0d1117 100%);
    }
    *, *::before, *::after { box-sizing: border-box; }
    img { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    button, input, textarea, select { font: inherit; }
    button { cursor: pointer; border: 0; }
    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 80;
      backdrop-filter: blur(16px);
      background: rgba(10, 14, 22, 0.76);
      border-bottom: 1px solid var(--line);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 74px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: 0;
      white-space: nowrap;
    }
    .brand-mark {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--brand), var(--brand-2));
      color: #141414;
      font-weight: 900;
      box-shadow: 0 10px 24px rgba(255, 107, 53, 0.28);
    }
    .brand-text { font-size: 1rem; }
    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text);
      border: 1px solid var(--line);
    }
    .nav-toggle:focus-visible,
    .nav a:focus-visible,
    .btn:focus-visible,
    .search-input:focus-visible,
    .faq-btn:focus-visible {
      outline: 2px solid rgba(255, 179, 71, 0.72);
      outline-offset: 2px;
    }
    .nav {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    .nav a {
      padding: 10px 14px;
      border-radius: 999px;
      color: var(--muted);
      transition: background var(--transition), color var(--transition), transform var(--transition);
    }
    .nav a:hover,
    .nav a.active {
      color: #fff;
      background: rgba(255, 255, 255, 0.06);
    }
    .article-hero {
      padding: 28px 0 18px;
    }
    .article-banner {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: 24px;
      background:
        linear-gradient(90deg, rgba(8, 12, 20, 0.90) 0%, rgba(8, 12, 20, 0.68) 56%, rgba(8, 12, 20, 0.30) 100%),
        url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
      box-shadow: var(--shadow);
    }
    .article-banner-inner {
      display: grid;
      grid-template-columns: minmax(0, 1.25fr) minmax(290px, 0.75fr);
      gap: 28px;
      align-items: stretch;
      padding: 34px;
      min-height: 340px;
    }
    .article-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: #fff;
      font-size: 0.92rem;
      margin-bottom: 16px;
    }
    .article-banner h1 {
      margin: 0;
      font-size: clamp(1.9rem, 3vw, 3.4rem);
      line-height: 1.15;
      letter-spacing: 0;
      max-width: 14ch;
    }
    .article-banner p {
      margin: 16px 0 0;
      color: rgba(244, 247, 251, 0.88);
      max-width: 66ch;
      font-size: 1.03rem;
    }
    .meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 22px;
    }
    .pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 34px;
      padding: 0 12px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.04);
      color: #e9f0ff;
      font-size: 0.92rem;
    }
    .article-visual {
      display: grid;
      gap: 14px;
      align-content: start;
    }
    .visual-card {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--line);
      background: rgba(17, 23, 35, 0.84);
      box-shadow: 0 16px 30px rgba(0, 0, 0, 0.18);
    }
    .visual-card img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
    }
    .visual-card-body {
      padding: 16px;
    }
    .visual-card-body h2 {
      margin: 0 0 8px;
      font-size: 1.08rem;
    }
    .visual-card-body p {
      margin: 0;
      color: var(--muted);
      font-size: 0.96rem;
    }
    .content-wrap {
      padding: 12px 0 20px;
    }
    .article-shell {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 320px;
      gap: 24px;
      align-items: start;
    }
    .article-main,
    .article-side,
    .section-box {
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(17, 23, 35, 0.88);
      box-shadow: var(--shadow);
    }
    .article-main {
      padding: 28px;
    }
    .breadcrumbs {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      color: var(--muted);
      font-size: 0.95rem;
      margin-bottom: 18px;
    }
    .breadcrumbs a {
      color: #d8e3f6;
    }
    .article-meta-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin: 18px 0 24px;
      padding-bottom: 18px;
      border-bottom: 1px solid var(--line);
    }
    .meta-chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 34px;
      padding: 0 12px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      color: var(--muted);
      font-size: 0.92rem;
    }
    .article-body {
      color: #e7eefb;
      font-size: 1.02rem;
    }
    .article-body h2,
    .article-body h3 {
      margin: 28px 0 14px;
      line-height: 1.25;
      letter-spacing: 0;
    }
    .article-body h2 { font-size: 1.55rem; }
    .article-body h3 { font-size: 1.22rem; }
    .article-body p { margin: 0 0 16px; color: #dbe4f1; }
    .article-body ul,
    .article-body ol {
      margin: 0 0 18px;
      padding-left: 22px;
      color: #dbe4f1;
    }
    .article-body li { margin: 8px 0; }
    .article-body blockquote {
      margin: 20px 0;
      padding: 18px 20px;
      border-left: 4px solid var(--brand);
      background: rgba(255, 107, 53, 0.08);
      border-radius: 0 14px 14px 0;
      color: #f7f1ea;
    }
    .article-body .figure {
      margin: 24px 0;
      overflow: hidden;
      border-radius: 18px;
      border: 1px solid var(--line);
      background: var(--surface-2);
    }
    .article-body .figure img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
    }
    .article-body .figure figcaption {
      padding: 12px 16px;
      color: var(--muted);
      font-size: 0.92rem;
      border-top: 1px solid var(--line);
    }
    .article-body .note {
      margin: 20px 0;
      padding: 16px 18px;
      border-radius: 16px;
      background: rgba(45, 212, 191, 0.08);
      border: 1px solid rgba(45, 212, 191, 0.16);
      color: #dffcf7;
    }
    .article-body a {
      color: #9ad4ff;
      text-decoration: underline;
      text-underline-offset: 2px;
    }
    .article-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
      padding-top: 20px;
      border-top: 1px solid var(--line);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 0 18px;
      border-radius: 12px;
      transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
      border: 1px solid transparent;
      font-weight: 700;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary {
      background: linear-gradient(135deg, var(--brand), var(--brand-2));
      color: #121212;
      box-shadow: 0 14px 28px rgba(255, 107, 53, 0.28);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text);
      border-color: var(--line);
    }
    .btn-ghost {
      background: transparent;
      color: var(--muted);
      border-color: var(--line);
    }
    .article-side {
      padding: 18px;
      display: grid;
      gap: 16px;
    }
    .side-block {
      padding: 16px;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--line);
    }
    .side-block h2,
    .side-block h3 {
      margin: 0 0 12px;
      font-size: 1.06rem;
    }
    .side-list {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .side-list a {
      display: block;
      padding: 12px 12px;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid transparent;
      color: #eaf1fc;
      transition: border-color var(--transition), transform var(--transition), background var(--transition);
    }
    .side-list a:hover {
      transform: translateY(-1px);
      background: rgba(255, 255, 255, 0.05);
      border-color: var(--line);
    }
    .thumb-row {
      display: grid;
      grid-template-columns: 96px minmax(0, 1fr);
      gap: 12px;
      align-items: center;
    }
    .thumb-row img {
      width: 96px;
      height: 72px;
      border-radius: 12px;
      object-fit: cover;
    }
    .thumb-row strong {
      display: block;
      font-size: 0.98rem;
      margin-bottom: 4px;
    }
    .thumb-row span {
      color: var(--muted);
      font-size: 0.9rem;
    }
    .section-grid {
      display: grid;
      gap: 24px;
      margin-top: 24px;
    }
    .section-box {
      padding: 22px;
    }
    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 18px;
    }
    .section-head h2 {
      margin: 0;
      font-size: 1.25rem;
    }
    .section-head p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
    }
    .related-card {
      overflow: hidden;
      border-radius: 16px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }
    .related-card:hover {
      transform: translateY(-2px);
      border-color: rgba(255, 179, 71, 0.22);
      box-shadow: 0 14px 26px rgba(0, 0, 0, 0.16);
    }
    .related-card img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
    }
    .related-card .body {
      padding: 14px;
    }
    .related-card .body h3 {
      margin: 0 0 8px;
      font-size: 1rem;
      line-height: 1.35;
    }
    .related-card .body p {
      margin: 0;
      color: var(--muted);
      font-size: 0.92rem;
    }
    .faq-list {
      display: grid;
      gap: 12px;
    }
    .faq-item {
      border: 1px solid var(--line);
      border-radius: 16px;
      overflow: hidden;
      background: rgba(255, 255, 255, 0.03);
    }
    .faq-btn {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 16px 18px;
      background: transparent;
      color: var(--text);
      text-align: left;
      border: 0;
      font-weight: 700;
    }
    .faq-answer {
      padding: 0 18px 16px;
      color: var(--muted);
      display: none;
    }
    .faq-item[open] .faq-answer { display: block; }
    .site-footer {
      margin-top: 28px;
      border-top: 1px solid var(--line);
      background: rgba(8, 12, 20, 0.86);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 24px;
      padding: 34px 0 22px;
    }
    .footer-col h3 {
      margin: 0 0 12px;
      font-size: 1rem;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 10px;
    }
    .footer-links a,
    .footer-links span {
      color: var(--muted);
    }
    .footer-note {
      padding: 18px 0 30px;
      color: var(--muted-2);
      border-top: 1px solid var(--line);
      font-size: 0.92rem;
    }
    .empty-state {
      padding: 24px;
      border: 1px dashed rgba(255, 255, 255, 0.14);
      border-radius: 16px;
      color: var(--muted);
      background: rgba(255, 255, 255, 0.02);
    }
    @media (max-width: 1120px) {
      .article-banner-inner,
      .article-shell,
      .footer-grid { grid-template-columns: 1fr; }
      .article-visual { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .related-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    }
    @media (max-width: 768px) {
      .nav-toggle { display: inline-flex; }
      .nav {
        display: none;
        position: absolute;
        left: 16px;
        right: 16px;
        top: 76px;
        padding: 12px;
        border-radius: 18px;
        background: rgba(13, 17, 23, 0.98);
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }
      .nav.is-open { display: flex; }
      .nav a { width: 100%; }
      .article-hero { padding-top: 18px; }
      .article-banner-inner,
      .article-main,
      .article-side,
      .section-box { padding: 18px; }
      .article-visual,
      .related-grid { grid-template-columns: 1fr; }
      .section-head { flex-direction: column; align-items: start; }
    }
    @media (max-width: 520px) {
      .container { width: min(100% - 20px, var(--container)); }
      .header-inner { min-height: 68px; }
      .brand-text { font-size: 0.95rem; }
      .article-banner h1 { max-width: 100%; }
      .btn { width: 100%; }
      .article-actions { flex-direction: column; }
      .meta-row, .article-meta-grid { gap: 8px; }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}