/* roulang page: index */
:root {
      --bg: #f4f6f8;
      --surface: #ffffff;
      --surface-2: #eef2f5;
      --text: #16202d;
      --muted: #5d6977;
      --soft: #7f8a97;
      --line: #d7dde3;
      --line-strong: #b8c1cb;
      --primary: #14253b;
      --primary-2: #233a56;
      --accent: #d95f34;
      --accent-2: #f0a15b;
      --success: #1e7a4d;
      --warning: #a86a08;
      --radius: 8px;
      --radius-sm: 6px;
      --shadow: 0 10px 28px rgba(20, 37, 59, 0.08);
      --shadow-soft: 0 5px 16px rgba(20, 37, 59, 0.06);
      --container: 1240px;
      --space-1: 4px;
      --space-2: 8px;
      --space-3: 12px;
      --space-4: 16px;
      --space-5: 20px;
      --space-6: 24px;
      --space-7: 32px;
      --space-8: 40px;
      --space-9: 56px;
      --space-10: 72px;
      --focus: 0 0 0 3px rgba(217, 95, 52, 0.18);
    }
    * { 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;
      color: var(--text);
      background: var(--bg);
      line-height: 1.7;
      letter-spacing: 0;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button, input, select, textarea { font: inherit; color: inherit; }
    button { border: 0; background: none; padding: 0; cursor: pointer; }
    ::selection { background: rgba(217, 95, 52, 0.18); }
    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }
    .skip-link {
      position: absolute;
      left: -9999px;
      top: auto;
      width: 1px;
      height: 1px;
      overflow: hidden;
    }
    .skip-link:focus {
      left: 16px;
      top: 16px;
      width: auto;
      height: auto;
      z-index: 1000;
      background: #fff;
      padding: 10px 14px;
      border: 1px solid var(--line);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-soft);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: rgba(244, 246, 248, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(215, 221, 227, 0.9);
    }
    .header-inner {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-4);
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: var(--primary);
      font-weight: 700;
      letter-spacing: 0;
    }
    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      color: #fff;
      box-shadow: var(--shadow-soft);
      flex: 0 0 auto;
    }
    .brand-mark svg { width: 20px; height: 20px; }
    .brand-text { display: flex; flex-direction: column; line-height: 1.2; }
    .brand-text strong { font-size: 1rem; }
    .brand-text span { font-size: 0.82rem; color: var(--muted); font-weight: 500; }
    .nav {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }
    .nav a {
      padding: 10px 14px;
      border-radius: 999px;
      color: var(--muted);
      font-weight: 600;
      transition: background-color .18s ease, color .18s ease, transform .18s ease, border-color .18s ease;
      border: 1px solid transparent;
    }
    .nav a:hover, .nav a:focus-visible {
      background: rgba(20, 37, 59, 0.04);
      color: var(--primary);
      transform: translateY(-1px);
      outline: none;
      border-color: var(--line);
      box-shadow: var(--focus);
    }
    .nav a.active {
      color: var(--primary);
      background: #fff;
      border-color: var(--line);
      box-shadow: var(--shadow-soft);
    }
    .hero {
      position: relative;
      padding: 28px 0 24px;
    }
    .hero-panel {
      overflow: hidden;
      border: 1px solid rgba(215, 221, 227, 0.9);
      border-radius: 18px;
      box-shadow: var(--shadow);
      background:
        linear-gradient(90deg, rgba(12, 20, 31, 0.84), rgba(12, 20, 31, 0.50)),
        url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
      color: #f5f8fc;
    }
    .hero-inner {
      display: grid;
      grid-template-columns: 1.08fr 0.92fr;
      gap: 0;
      min-height: 620px;
    }
    .hero-copy {
      padding: clamp(28px, 5vw, 64px);
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      width: fit-content;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.16);
      color: #f0f4f8;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .hero h1 {
      margin: 0;
      font-size: clamp(2.1rem, 4vw, 4rem);
      line-height: 1.12;
      letter-spacing: 0;
      max-width: 11ch;
    }
    .hero .lead {
      margin: 18px 0 0;
      max-width: 40rem;
      font-size: 1.04rem;
      color: rgba(245, 248, 252, 0.88);
    }
    .hero-meta {
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 34px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.14);
      color: #f3f6fa;
      font-size: 0.92rem;
    }
    .hero-actions {
      margin-top: 28px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .btn {
      min-height: 46px;
      padding: 0 18px;
      border-radius: 10px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      font-weight: 700;
      transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease;
      border: 1px solid transparent;
    }
    .btn:hover, .btn:focus-visible {
      transform: translateY(-1px);
      outline: none;
      box-shadow: var(--focus);
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--accent), #e26f44);
      color: #fff;
      box-shadow: 0 10px 24px rgba(217, 95, 52, 0.24);
    }
    .btn-primary:hover, .btn-primary:focus-visible { background: linear-gradient(135deg, #e06639, #cf572f); }
    .btn-ghost {
      background: rgba(255, 255, 255, 0.04);
      border-color: rgba(255, 255, 255, 0.18);
      color: #fff;
    }
    .btn-ghost:hover, .btn-ghost:focus-visible { background: rgba(255, 255, 255, 0.09); }
    .trust-row {
      margin-top: 22px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      color: rgba(245, 248, 252, 0.8);
      font-size: 0.94rem;
    }
    .trust-row span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .hero-visual {
      position: relative;
      padding: clamp(20px, 3vw, 32px);
      display: flex;
      align-items: stretch;
      justify-content: stretch;
      min-height: 100%;
    }
    .hero-card {
      width: 100%;
      border-radius: 16px;
      overflow: hidden;
      background: rgba(255, 255, 255, 0.96);
      color: var(--text);
      box-shadow: 0 18px 36px rgba(11, 20, 33, 0.18);
      display: flex;
      flex-direction: column;
      border: 1px solid rgba(255, 255, 255, 0.65);
    }
    .hero-card figure {
      margin: 0;
      position: relative;
      aspect-ratio: 16 / 10;
      overflow: hidden;
    }
    .hero-card figure img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .hero-card figure::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(0, 0, 0, 0) 40%, rgba(0, 0, 0, 0.28) 100%);
    }
    .hero-card-body {
      padding: 20px;
      display: grid;
      gap: 14px;
      background: #fff;
    }
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }
    .metric {
      padding: 14px 12px;
      border-radius: 10px;
      background: var(--surface-2);
      border: 1px solid var(--line);
    }
    .metric strong {
      display: block;
      font-size: 1.35rem;
      line-height: 1.1;
      color: var(--primary);
    }
    .metric span {
      display: block;
      margin-top: 6px;
      color: var(--muted);
      font-size: 0.88rem;
    }
    .note-box {
      padding: 14px 15px;
      border-radius: 10px;
      border: 1px solid rgba(217, 95, 52, 0.22);
      background: rgba(217, 95, 52, 0.07);
      color: #56301f;
      font-size: 0.95rem;
    }
    main { padding: 6px 0 24px; }
    .section {
      padding: 26px 0;
    }
    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 18px;
    }
    .section-head h2 {
      margin: 0;
      font-size: clamp(1.35rem, 2vw, 2rem);
      line-height: 1.2;
      color: var(--primary);
    }
    .section-head p {
      margin: 0;
      color: var(--muted);
      max-width: 42rem;
    }
    .section-link {
      color: var(--accent);
      font-weight: 700;
      white-space: nowrap;
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: 18px;
    }
    .feature-main, .feature-side, .timeline-card, .article-panel, .faq-panel, .cta-panel, .contact-panel, .list-panel, .story-panel, .reading-panel {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: 14px;
      box-shadow: var(--shadow-soft);
    }
    .feature-main {
      grid-column: span 7;
      padding: 24px;
    }
    .feature-side {
      grid-column: span 5;
      padding: 22px;
      background: linear-gradient(180deg, #fff, #f8fafc);
    }
    .bullet-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 14px;
    }
    .bullet-list li {
      display: flex;
      gap: 12px;
      padding-bottom: 14px;
      border-bottom: 1px solid #edf1f4;
    }
    .bullet-list li:last-child { border-bottom: 0; padding-bottom: 0; }
    .bullet-icon {
      width: 28px;
      height: 28px;
      flex: 0 0 auto;
      border-radius: 8px;
      display: grid;
      place-items: center;
      background: rgba(20, 37, 59, 0.08);
      color: var(--primary);
      font-weight: 800;
    }
    .bullet-list h3 {
      margin: 0;
      font-size: 1.03rem;
      color: var(--primary);
    }
    .bullet-list p {
      margin: 5px 0 0;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .panel-media {
      margin-top: 18px;
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--line);
      aspect-ratio: 16 / 9;
      background: #dfe6ec;
    }
    .panel-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .side-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 16px;
    }
    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 32px;
      padding: 0 12px;
      border-radius: 999px;
      background: #eef3f7;
      border: 1px solid var(--line);
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 600;
    }
    .timeline-card {
      padding: 24px;
    }
    .timeline {
      display: grid;
      gap: 16px;
      margin-top: 10px;
    }
    .timeline-item {
      display: grid;
      grid-template-columns: 88px 1fr;
      gap: 16px;
      align-items: start;
      padding-bottom: 14px;
      border-bottom: 1px solid #edf1f4;
    }
    .timeline-item:last-child { padding-bottom: 0; border-bottom: 0; }
    .timeline-item time {
      color: var(--accent);
      font-weight: 700;
      font-size: 0.94rem;
    }
    .timeline-item h3 {
      margin: 0;
      font-size: 1rem;
      color: var(--primary);
    }
    .timeline-item p {
      margin: 5px 0 0;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .stats-band {
      margin-top: 18px;
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }
    .stat {
      padding: 18px 16px;
      border-radius: 12px;
      background: #fff;
      border: 1px solid var(--line);
    }
    .stat strong {
      display: block;
      font-size: 1.45rem;
      line-height: 1.05;
      color: var(--primary);
    }
    .stat span {
      display: block;
      margin-top: 6px;
      color: var(--muted);
      font-size: 0.9rem;
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }
    .article-card {
      display: flex;
      flex-direction: column;
      overflow: hidden;
      border-radius: 14px;
      background: var(--surface);
      border: 1px solid var(--line);
      box-shadow: var(--shadow-soft);
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
      min-height: 100%;
    }
    .article-card:hover, .article-card:focus-within {
      transform: translateY(-2px);
      border-color: rgba(217, 95, 52, 0.3);
      box-shadow: var(--shadow);
    }
    .article-thumb {
      aspect-ratio: 16 / 10;
      background: #dfe6ec;
      overflow: hidden;
      border-bottom: 1px solid var(--line);
    }
    .article-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .article-body {
      padding: 18px;
      display: grid;
      gap: 12px;
      flex: 1;
    }
    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      color: var(--soft);
      font-size: 0.88rem;
    }
    .article-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: #c2cad2; }
    .article-body h3 {
      margin: 0;
      font-size: 1.06rem;
      line-height: 1.4;
      color: var(--primary);
    }
    .article-body p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .article-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--accent);
      font-weight: 700;
      margin-top: auto;
    }
    .empty-state {
      padding: 22px;
      border-radius: 14px;
      border: 1px dashed var(--line-strong);
      background: #fff;
      color: var(--muted);
    }
    .faq-panel {
      padding: 24px;
    }
    .faq-list { display: grid; gap: 12px; }
    details {
      border: 1px solid var(--line);
      border-radius: 12px;
      background: #fff;
      overflow: hidden;
    }
    summary {
      list-style: none;
      cursor: pointer;
      padding: 16px 18px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    summary::-webkit-details-marker { display: none; }
    summary::after {
      content: '+';
      color: var(--accent);
      font-size: 1.3rem;
      line-height: 1;
      flex: 0 0 auto;
    }
    details[open] summary::after { content: '−'; }
    details p {
      margin: 0;
      padding: 0 18px 18px;
      color: var(--muted);
    }
    .cta-panel {
      padding: 26px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 20px;
      align-items: center;
      background: linear-gradient(180deg, #fff, #f7f9fb);
    }
    .cta-panel h2 {
      margin: 0;
      font-size: clamp(1.45rem, 2.2vw, 2.2rem);
      color: var(--primary);
    }
    .cta-panel p {
      margin: 12px 0 0;
      color: var(--muted);
    }
    .cta-box {
      padding: 18px;
      border-radius: 12px;
      background: rgba(20, 37, 59, 0.05);
      border: 1px solid var(--line);
      display: grid;
      gap: 10px;
    }
    .cta-box strong { color: var(--primary); }
    .cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .contact-panel {
      padding: 24px;
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: 14px;
      margin-top: 14px;
    }
    .field {
      grid-column: span 6;
      display: grid;
      gap: 8px;
    }
    .field.full { grid-column: 1 / -1; }
    label { font-weight: 700; color: var(--primary); font-size: 0.94rem; }
    input, select, textarea {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: #fff;
      padding: 12px 14px;
      color: var(--text);
      transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
    }
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: rgba(217, 95, 52, 0.6);
      box-shadow: var(--focus);
    }
    textarea { min-height: 120px; resize: vertical; }
    .form-note {
      color: var(--muted);
      font-size: 0.92rem;
    }
    .submit-row {
      display: flex;
      justify-content: space-between;
      gap: 14px;
      align-items: center;
      margin-top: 4px;
      flex-wrap: wrap;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 34px;
      padding: 0 12px;
      border-radius: 999px;
      background: rgba(30, 122, 77, 0.08);
      color: var(--success);
      border: 1px solid rgba(30, 122, 77, 0.18);
      font-size: 0.92rem;
      font-weight: 700;
    }
    .site-footer {
      margin-top: 22px;
      background: #101826;
      color: #d9e1ea;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-inner {
      padding: 34px 0 24px;
      display: grid;
      grid-template-columns: 1.3fr 0.9fr 0.8fr;
      gap: 24px;
    }
    .footer-brand {
      display: grid;
      gap: 12px;
    }
    .footer-brand p { margin: 0; color: #b9c3cf; }
    .footer-links, .footer-contacts {
      display: grid;
      gap: 10px;
      align-content: start;
    }
    .footer-links a, .footer-contacts a {
      color: #d8e2ec;
      transition: color .18s ease;
    }
    .footer-links a:hover, .footer-contacts a:hover, .footer-links a:focus-visible, .footer-contacts a:focus-visible {
      color: #fff;
      outline: none;
    }
    .footer-note {
      padding: 14px 0 26px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      color: #98a6b5;
      font-size: 0.92rem;
    }
    .reading-panel {
      padding: 24px;
      display: grid;
      gap: 18px;
    }
    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      color: var(--muted);
      font-size: 0.92rem;
    }
    .breadcrumb a { color: var(--accent); font-weight: 600; }
    .reading-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 300px;
      gap: 18px;
      align-items: start;
    }
    .article-content {
      padding-right: 6px;
    }
    .article-content h2, .article-content h3 {
      color: var(--primary);
      line-height: 1.3;
    }
    .article-content p, .article-content li {
      color: var(--text);
    }
    .article-content .lead-paragraph {
      font-size: 1.02rem;
      color: var(--muted);
    }
    .article-content .inline-image {
      margin: 18px 0;
      overflow: hidden;
      border-radius: 14px;
      border: 1px solid var(--line);
      background: #e6ebf0;
    }
    .article-content .inline-image img {
      width: 100%;
      height: auto;
      display: block;
    }
    .sidebar-box {
      padding: 18px;
      border-radius: 14px;
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: var(--shadow-soft);
      display: grid;
      gap: 12px;
      position: sticky;
      top: 94px;
    }
    .sidebar-box h3 { margin: 0; color: var(--primary); }
    .sidebar-box a {
      color: var(--accent);
      font-weight: 700;
    }
    .related-list { display: grid; gap: 10px; }
    .related-item {
      padding: 12px 0;
      border-bottom: 1px solid #edf1f4;
    }
    .related-item:last-child { border-bottom: 0; padding-bottom: 0; }
    .related-item a { color: var(--primary); font-weight: 700; }
    .related-item p { margin: 6px 0 0; color: var(--muted); font-size: 0.92rem; }
    .pager {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      padding-top: 12px;
      border-top: 1px solid #edf1f4;
    }
    .pager a {
      color: var(--accent);
      font-weight: 700;
    }
    @media (max-width: 1080px) {
      .hero-inner { grid-template-columns: 1fr; }
      .hero-visual { padding-top: 0; }
      .feature-main, .feature-side { grid-column: 1 / -1; }
      .articles-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .cta-panel, .reading-layout, .footer-inner { grid-template-columns: 1fr; }
      .sidebar-box { position: static; }
    }
    @media (max-width: 768px) {
      .header-inner { flex-direction: column; align-items: flex-start; padding: 12px 0; }
      .nav { justify-content: flex-start; }
      .hero { padding-top: 16px; }
      .hero-inner { min-height: auto; }
      .hero-copy { padding: 22px; }
      .hero h1 { max-width: none; }
      .stats-band, .metric-grid, .articles-grid { grid-template-columns: 1fr 1fr; }
      .section-head { flex-direction: column; align-items: flex-start; }
      .timeline-item { grid-template-columns: 1fr; gap: 6px; }
      .field { grid-column: 1 / -1; }
      .submit-row { align-items: flex-start; }
    }
    @media (max-width: 520px) {
      .container { width: min(100% - 24px, var(--container)); }
      .nav a { padding: 9px 12px; }
      .hero-copy, .hero-visual, .feature-main, .feature-side, .timeline-card, .faq-panel, .cta-panel, .contact-panel, .reading-panel { padding: 18px; }
      .hero-actions, .cta-actions { flex-direction: column; }
      .btn { width: 100%; }
      .metric-grid, .stats-band, .articles-grid { grid-template-columns: 1fr; }
      .article-body { padding: 16px; }
      .footer-inner { padding-top: 28px; }
    }

/* roulang page: article */
:root {
      --bg: #f4f6f8;
      --surface: #ffffff;
      --surface-2: #eef2f5;
      --text: #16202d;
      --muted: #5d6977;
      --soft: #7f8a97;
      --line: #d7dde3;
      --line-strong: #b8c1cb;
      --primary: #14253b;
      --primary-2: #233a56;
      --accent: #d95f34;
      --accent-2: #f0a15b;
      --success: #1e7a4d;
      --warning: #a86a08;
      --radius: 8px;
      --radius-sm: 6px;
      --shadow: 0 10px 28px rgba(20, 37, 59, 0.08);
      --shadow-soft: 0 5px 16px rgba(20, 37, 59, 0.06);
      --container: 1240px;
      --space-1: 4px;
      --space-2: 8px;
      --space-3: 12px;
      --space-4: 16px;
      --space-5: 20px;
      --space-6: 24px;
      --space-7: 32px;
      --space-8: 40px;
      --space-9: 56px;
      --space-10: 72px;
      --focus: 0 0 0 3px rgba(217, 95, 52, 0.18);
    }

    html { scroll-behavior: smooth; }

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

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button, input, select, textarea { font: inherit; color: inherit; }
    button { border: 0; background: none; padding: 0; cursor: pointer; }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: rgba(244, 246, 248, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(215, 221, 227, 0.9);
    }

    .header-inner {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-4);
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: var(--primary);
      font-weight: 700;
      letter-spacing: 0;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      color: #fff;
      box-shadow: var(--shadow-soft);
      flex: 0 0 auto;
    }

    .brand-mark svg { width: 20px; height: 20px; }
    .brand-text { display: flex; flex-direction: column; line-height: 1.2; }
    .brand-text strong { font-size: 1rem; }
    .brand-text span { font-size: 0.82rem; color: var(--muted); font-weight: 500; }

    .nav {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .nav a {
      padding: 10px 14px;
      border-radius: 999px;
      color: var(--muted);
      font-weight: 600;
      transition: background-color .18s ease, color .18s ease, transform .18s ease, border-color .18s ease, box-shadow .18s ease;
      border: 1px solid transparent;
    }

    .nav a:hover,
    .nav a:focus-visible {
      background: rgba(20, 37, 59, 0.04);
      color: var(--primary);
      transform: translateY(-1px);
      outline: none;
      border-color: var(--line);
      box-shadow: var(--focus);
    }

    .nav a.active {
      color: var(--primary);
      background: #fff;
      border-color: var(--line);
      box-shadow: var(--shadow-soft);
    }

    .btn {
      min-height: 46px;
      padding: 0 18px;
      border-radius: 10px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      font-weight: 700;
      transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease;
      border: 1px solid transparent;
    }

    .btn:hover,
    .btn:focus-visible {
      transform: translateY(-1px);
      outline: none;
      box-shadow: var(--focus);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), #e26f44);
      color: #fff;
      box-shadow: 0 10px 24px rgba(217, 95, 52, 0.24);
    }

    .btn-primary:hover,
    .btn-primary:focus-visible {
      background: linear-gradient(135deg, #e06639, #cf572f);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.04);
      border-color: var(--line);
      color: var(--primary);
    }

    .btn-ghost:hover,
    .btn-ghost:focus-visible {
      background: #fff;
      border-color: var(--line-strong);
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 34px;
      padding: 7px 12px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--line);
      color: var(--muted);
      font-size: 0.92rem;
    }

    .section {
      padding: var(--space-9) 0;
    }

    .article-hero {
      padding: 28px 0 18px;
    }

    .article-hero-panel {
      overflow: hidden;
      border: 1px solid rgba(215, 221, 227, 0.95);
      border-radius: 18px;
      box-shadow: var(--shadow);
      background:
        linear-gradient(90deg, rgba(13, 22, 33, 0.88), rgba(13, 22, 33, 0.52)),
        url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
      color: #f5f8fc;
      display: grid;
      grid-template-columns: 1.18fr 0.82fr;
      min-height: 460px;
    }

    .article-hero-copy {
      padding: clamp(28px, 5vw, 64px);
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      width: fit-content;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.16);
      color: #f0f4f8;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .article-hero h1 {
      margin: 0;
      font-size: clamp(2rem, 4vw, 3.6rem);
      line-height: 1.12;
      letter-spacing: 0;
      max-width: 12ch;
    }

    .article-hero .lead {
      margin: 18px 0 0;
      max-width: 52rem;
      font-size: 1.04rem;
      color: rgba(245, 248, 252, 0.88);
    }

    .hero-meta {
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .hero-actions {
      margin-top: 28px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .article-hero-visual {
      padding: clamp(18px, 3vw, 28px);
      display: flex;
      align-items: flex-end;
      justify-content: flex-end;
    }

    .visual-card {
      width: min(100%, 420px);
      background: rgba(255, 255, 255, 0.95);
      color: var(--text);
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 18px 44px rgba(0, 0, 0, 0.18);
      overflow: hidden;
    }

    .visual-card img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }

    .visual-card .visual-body {
      padding: 18px 18px 20px;
    }

    .visual-card h2 {
      margin: 0 0 8px;
      font-size: 1.08rem;
      line-height: 1.35;
    }

    .visual-card p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }

    .article-shell {
      padding: 14px 0 0;
    }

    .article-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 340px;
      gap: 24px;
      align-items: start;
    }

    .article-card,
    .side-card,
    .update-card,
    .faq-card,
    .cta-card {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow-soft);
    }

    .article-card {
      padding: 26px;
    }

    .breadcrumb-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      color: var(--muted);
      font-size: 0.94rem;
      margin-bottom: 18px;
    }

    .breadcrumb-wrap a {
      color: var(--muted);
      transition: color .18s ease;
    }

    .breadcrumb-wrap a:hover,
    .breadcrumb-wrap a:focus-visible {
      color: var(--primary);
      outline: none;
    }

    .article-meta-line {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 18px 0 0;
    }

    .meta-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 34px;
      padding: 7px 12px;
      border-radius: 999px;
      background: var(--surface-2);
      border: 1px solid var(--line);
      color: var(--muted);
      font-size: 0.92rem;
    }

    .article-divider {
      height: 1px;
      background: var(--line);
      margin: 22px 0;
    }

    .article-body {
      color: var(--text);
      font-size: 1rem;
    }

    .article-body > :first-child { margin-top: 0; }
    .article-body > :last-child { margin-bottom: 0; }

    .article-body h2,
    .article-body h3,
    .article-body h4 {
      color: var(--primary);
      line-height: 1.28;
      margin: 1.6em 0 0.72em;
    }

    .article-body h2 { font-size: 1.5rem; }
    .article-body h3 { font-size: 1.15rem; }
    .article-body p { margin: 0 0 1em; }
    .article-body ul,
    .article-body ol {
      padding-left: 1.25rem;
      margin: 0 0 1em;
    }
    .article-body li { margin-bottom: 0.55em; }
    .article-body a {
      color: var(--accent);
      text-decoration: underline;
      text-underline-offset: 0.18em;
    }
    .article-body img,
    .article-body video,
    .article-body iframe {
      max-width: 100%;
      border-radius: var(--radius);
      margin: 18px 0;
    }
    .article-body figure {
      margin: 18px 0;
    }
    .article-body figcaption {
      margin-top: 8px;
      font-size: 0.92rem;
      color: var(--muted);
    }
    .article-body blockquote {
      margin: 18px 0;
      padding: 16px 18px;
      border-left: 4px solid var(--accent);
      background: #fbf7f5;
      border-radius: 0 var(--radius) var(--radius) 0;
      color: var(--primary);
    }
    .article-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 18px 0;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
    }
    .article-body th,
    .article-body td {
      border-bottom: 1px solid var(--line);
      padding: 12px 14px;
      text-align: left;
      vertical-align: top;
    }
    .article-body th {
      background: var(--surface-2);
      color: var(--primary);
      font-weight: 700;
    }
    .article-body hr {
      border: 0;
      border-top: 1px solid var(--line);
      margin: 24px 0;
    }

    .article-footer-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
    }

    .empty-state {
      text-align: center;
      padding: 40px 18px;
    }

    .empty-state h2 {
      margin: 0 0 10px;
      color: var(--primary);
      font-size: 1.4rem;
    }

    .empty-state p {
      margin: 0 0 18px;
      color: var(--muted);
    }

    .article-aside {
      display: grid;
      gap: 16px;
      position: sticky;
      top: 92px;
    }

    .side-card {
      overflow: hidden;
    }

    .side-card .side-head {
      padding: 18px 18px 0;
    }

    .side-card .side-body {
      padding: 18px;
    }

    .side-image {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-bottom: 1px solid var(--line);
    }

    .side-title {
      margin: 0 0 8px;
      font-size: 1.08rem;
      line-height: 1.35;
      color: var(--primary);
    }

    .side-text {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }

    .side-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 12px;
    }

    .side-list li {
      padding: 12px 0 0;
      border-top: 1px solid var(--line);
    }

    .side-list li:first-child {
      border-top: 0;
      padding-top: 0;
    }

    .side-list strong {
      display: block;
      color: var(--primary);
      line-height: 1.35;
      margin-bottom: 4px;
    }

    .side-list span {
      color: var(--muted);
      font-size: 0.94rem;
    }

    .side-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 12px;
    }

    .updates-section {
      padding: var(--space-9) 0 0;
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 16px;
      margin-bottom: 18px;
    }

    .section-head h2 {
      margin: 0;
      color: var(--primary);
      font-size: 1.7rem;
      line-height: 1.2;
    }

    .section-head p {
      margin: 8px 0 0;
      color: var(--muted);
      max-width: 56rem;
    }

    .update-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .update-card {
      overflow: hidden;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }

    .update-card:hover,
    .update-card:focus-within {
      transform: translateY(-2px);
      box-shadow: var(--shadow);
      border-color: var(--line-strong);
    }

    .update-thumb {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-bottom: 1px solid var(--line);
    }

    .update-body {
      padding: 18px;
    }

    .update-topline {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 10px;
    }

    .tiny-badge {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 999px;
      background: var(--surface-2);
      color: var(--muted);
      border: 1px solid var(--line);
      font-size: 0.84rem;
    }

    .update-body h3 {
      margin: 0 0 10px;
      font-size: 1.08rem;
      line-height: 1.45;
      color: var(--primary);
    }

    .update-body p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }

    .update-foot {
      padding: 0 18px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      color: var(--soft);
      font-size: 0.9rem;
    }

    .faq-section {
      padding: var(--space-9) 0 0;
    }

    .faq-grid {
      display: grid;
      gap: 14px;
    }

    .faq-card {
      overflow: hidden;
    }

    .faq-card summary {
      list-style: none;
      cursor: pointer;
      padding: 18px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-weight: 700;
      color: var(--primary);
    }

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

    .faq-card summary::after {
      content: '+';
      width: 28px;
      height: 28px;
      border-radius: 999px;
      display: grid;
      place-items: center;
      border: 1px solid var(--line);
      color: var(--muted);
      flex: 0 0 auto;
    }

    .faq-card[open] summary::after {
      content: '−';
      background: var(--surface-2);
    }

    .faq-card .faq-body {
      padding: 0 20px 18px;
      color: var(--muted);
      border-top: 1px solid var(--line);
    }

    .cta-section {
      padding: var(--space-9) 0;
    }

    .cta-card {
      padding: 26px;
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 22px;
      align-items: center;
    }

    .cta-card h2 {
      margin: 0 0 12px;
      color: var(--primary);
      font-size: 1.7rem;
      line-height: 1.2;
    }

    .cta-card p {
      margin: 0;
      color: var(--muted);
    }

    .contact-panel {
      background: var(--surface-2);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 18px;
    }

    .contact-panel strong {
      display: block;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .contact-panel .contact-line {
      color: var(--muted);
      margin-bottom: 14px;
    }

    .contact-panel .contact-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .site-footer {
      background: #101b2a;
      color: #d9e2ec;
      margin-top: 8px;
      padding: 34px 0 20px;
    }

    .footer-inner {
      display: grid;
      grid-template-columns: 1.2fr .8fr .8fr;
      gap: 22px;
      align-items: start;
    }

    .footer-brand p {
      margin: 14px 0 0;
      color: #aab6c4;
      max-width: 34rem;
    }

    .footer-links,
    .footer-contacts {
      display: grid;
      gap: 10px;
    }

    .footer-links strong,
    .footer-contacts strong {
      color: #fff;
      margin-bottom: 6px;
    }

    .footer-links a,
    .footer-contacts a {
      color: #aab6c4;
      transition: color .18s ease;
    }

    .footer-links a:hover,
    .footer-links a:focus-visible,
    .footer-contacts a:hover,
    .footer-contacts a:focus-visible {
      color: #fff;
      outline: none;
    }

    .footer-note {
      margin-top: 24px;
      padding-top: 16px;
      border-top: 1px solid rgba(170, 182, 196, 0.18);
      color: #8f9dad;
      font-size: 0.92rem;
    }

    @media (max-width: 1080px) {
      .article-grid {
        grid-template-columns: 1fr;
      }

      .article-aside {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .cta-card,
      .article-hero-panel {
        grid-template-columns: 1fr;
      }

      .article-hero-visual {
        padding-top: 0;
        justify-content: flex-start;
      }

      .visual-card {
        width: 100%;
        max-width: 520px;
      }

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

      .footer-brand {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        padding: 12px 0;
        min-height: auto;
        flex-direction: column;
        align-items: flex-start;
      }

      .nav {
        width: 100%;
        justify-content: flex-start;
      }

      .article-hero h1,
      .cta-card h2,
      .section-head h2 {
        max-width: none;
      }

      .article-card {
        padding: 20px;
      }

      .article-aside,
      .update-grid,
      .footer-inner,
      .cta-card {
        grid-template-columns: 1fr;
      }

      .hero-actions,
      .article-footer-actions,
      .contact-panel .contact-links,
      .side-actions {
        flex-direction: column;
      }

      .hero-actions .btn,
      .article-footer-actions .btn,
      .contact-panel .btn,
      .side-actions .btn {
        width: 100%;
      }

      .section-head {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 520px) {
      .container {
        width: min(100% - 20px, var(--container));
      }

      .article-hero {
        padding-top: 16px;
      }

      .article-hero-panel {
        min-height: auto;
      }

      .article-hero-copy,
      .visual-card .visual-body,
      .update-body,
      .faq-card summary,
      .faq-card .faq-body,
      .contact-panel,
      .side-card .side-head,
      .side-card .side-body,
      .cta-card,
      .site-footer {
        padding-left: 16px;
        padding-right: 16px;
      }

      .article-card,
      .cta-card {
        padding: 16px;
      }

      .brand-text span {
        font-size: 0.78rem;
      }

      .article-hero h1 {
        font-size: 1.9rem;
      }

      .section {
        padding: 40px 0;
      }
    }

/* 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}