/* roulang page: index */
:root{
    --bg:#f5f8fc;
    --bg-soft:#edf3fb;
    --card:#ffffff;
    --card-2:#f9fbff;
    --text:#172033;
    --muted:#5f6f86;
    --soft:#7f90a8;
    --primary:#4a78d8;
    --primary-strong:#315db6;
    --primary-soft:#e8f0ff;
    --primary-deep:#25468f;
    --border:#d8e2f1;
    --shadow:0 18px 48px rgba(42, 73, 140, .12);
    --shadow-sm:0 8px 24px rgba(42, 73, 140, .08);
    --shadow-hover:0 24px 60px rgba(42, 73, 140, .16);
    --radius:24px;
    --radius-sm:16px;
    --radius-xs:12px;
    --container:1240px;
    --gap:24px;
    --gap-sm:16px;
    --line:1px solid var(--border);
    --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", "Noto Sans CJK SC", "Segoe UI", Arial, sans-serif;
    color:var(--text);
    background:
      radial-gradient(circle at top left, rgba(74,120,216,.10), transparent 32%),
      radial-gradient(circle at top right, rgba(113,158,214,.10), transparent 26%),
      linear-gradient(180deg, #fbfdff 0%, #f4f7fc 100%);
    line-height:1.7;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    min-height:100vh;
  }
  a{
    color:inherit;
    text-decoration:none;
    transition: color var(--transition), transform var(--transition), background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
  }
  img{ max-width:100%; display:block; }
  button, input, textarea, select{
    font:inherit;
    color:inherit;
  }
  button{
    cursor:pointer;
  }
  ::selection{
    background: rgba(74, 120, 216, .18);
    color: var(--text);
  }
  .container{
    width:min(var(--container), calc(100% - 40px));
    margin:0 auto;
  }
  .site-header{
    position:sticky;
    top:0;
    z-index:100;
    backdrop-filter: blur(12px);
    background: rgba(250, 252, 255, .88);
    border-bottom:1px solid rgba(216,226,241,.9);
  }
  .header-inner{
    min-height:76px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:14px;
    min-width:0;
  }
  .brand-mark{
    width:46px;
    height:46px;
    border-radius:16px;
    display:grid;
    place-items:center;
    background: linear-gradient(145deg, #4f7fe1, #7ea6ef);
    color:#fff;
    box-shadow: 0 10px 24px rgba(74,120,216,.28);
    font-weight:800;
    letter-spacing:.4px;
    flex:none;
  }
  .brand-text{
    display:flex;
    flex-direction:column;
    min-width:0;
  }
  .brand-name{
    font-size:1rem;
    line-height:1.2;
    font-weight:800;
    letter-spacing:.2px;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .brand-sub{
    font-size:.85rem;
    color:var(--muted);
    margin-top:4px;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .nav{
    display:flex;
    align-items:center;
    gap:8px;
  }
  .nav-links{
    display:flex;
    align-items:center;
    gap:6px;
    padding:8px;
    border:var(--line);
    background:rgba(255,255,255,.72);
    border-radius:999px;
    box-shadow: var(--shadow-sm);
  }
  .nav-links a{
    padding:10px 14px;
    border-radius:999px;
    font-size:.95rem;
    color:var(--muted);
    font-weight:600;
    position:relative;
  }
  .nav-links a:hover,
  .nav-links a:focus-visible{
    color:var(--primary-deep);
    background:var(--primary-soft);
    outline:none;
  }
  .nav-links a.active{
    background:var(--primary);
    color:#fff;
    box-shadow:0 10px 20px rgba(74,120,216,.22);
  }
  .lang-pill{
    display:inline-flex;
    align-items:center;
    gap:8px;
    height:44px;
    padding:0 14px;
    border-radius:999px;
    border:var(--line);
    background:#fff;
    box-shadow: var(--shadow-sm);
    color:var(--muted);
    font-weight:600;
    font-size:.92rem;
    flex:none;
    white-space:nowrap;
  }
  .lang-pill .dot{
    width:8px;
    height:8px;
    border-radius:50%;
    background:var(--primary);
    box-shadow:0 0 0 4px rgba(74,120,216,.12);
  }
  .header-cta{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    height:44px;
    padding:0 16px;
    border-radius:999px;
    border:1px solid transparent;
    background:var(--primary);
    color:#fff;
    font-weight:700;
    box-shadow:0 14px 26px rgba(74,120,216,.24);
    white-space:nowrap;
  }
  .header-cta:hover,
  .header-cta:focus-visible{
    background:var(--primary-strong);
    box-shadow:0 18px 34px rgba(74,120,216,.30);
    transform:translateY(-1px);
    outline:none;
  }
  .menu-toggle{
    display:none;
    width:46px;
    height:46px;
    border-radius:14px;
    border:var(--line);
    background:#fff;
    box-shadow: var(--shadow-sm);
    align-items:center;
    justify-content:center;
    gap:4px;
    flex-direction:column;
    padding:0;
  }
  .menu-toggle span{
    display:block;
    width:18px;
    height:2px;
    background:var(--primary-deep);
    border-radius:99px;
  }
  .mobile-drawer{
    position:fixed;
    inset:76px 0 auto 0;
    background:rgba(248,251,255,.98);
    border-bottom:1px solid var(--border);
    box-shadow:0 24px 42px rgba(25,35,54,.08);
    transform:translateY(-18px);
    opacity:0;
    pointer-events:none;
    transition: transform var(--transition), opacity var(--transition);
    z-index:99;
  }
  .mobile-drawer.open{
    transform:translateY(0);
    opacity:1;
    pointer-events:auto;
  }
  .drawer-inner{
    padding:18px 0 20px;
    display:grid;
    gap:14px;
  }
  .drawer-links{
    display:grid;
    gap:8px;
  }
  .drawer-links a{
    padding:14px 16px;
    border-radius:16px;
    background:#fff;
    border:1px solid var(--border);
    font-weight:600;
    color:var(--text);
    box-shadow: var(--shadow-sm);
  }
  .drawer-links a.active{
    background:var(--primary-soft);
    border-color:rgba(74,120,216,.22);
    color:var(--primary-deep);
  }
  .drawer-actions{
    display:flex;
    gap:10px;
    flex-wrap:wrap;
  }
  .drawer-actions .lang-pill,
  .drawer-actions .header-cta{
    flex:1 1 180px;
    justify-content:center;
  }
  .hero{
    padding:34px 0 16px;
  }
  .hero-shell{
    position:relative;
    overflow:hidden;
    border:1px solid rgba(216,226,241,.95);
    background:
      linear-gradient(180deg, rgba(255,255,255,.96), rgba(249,252,255,.96)),
      radial-gradient(circle at top right, rgba(74,120,216,.08), transparent 30%);
    border-radius:32px;
    box-shadow: var(--shadow);
  }
  .hero-shell::before{
    content:"";
    position:absolute;
    inset:-1px;
    background:
      linear-gradient(120deg, rgba(74,120,216,.04), transparent 32%, rgba(74,120,216,.05) 65%, transparent 100%);
    pointer-events:none;
  }
  .hero-inner{
    position:relative;
    padding:34px;
    display:grid;
    grid-template-columns: 1.08fr .92fr;
    gap:28px;
    align-items:stretch;
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:8px 14px;
    border-radius:999px;
    background:var(--primary-soft);
    color:var(--primary-deep);
    font-size:.88rem;
    font-weight:700;
    letter-spacing:.2px;
    width:fit-content;
  }
  .eyebrow .mini-dot{
    width:7px;
    height:7px;
    border-radius:50%;
    background:var(--primary);
  }
  .hero h1{
    margin:16px 0 14px;
    font-size:clamp(2rem, 4vw, 3.45rem);
    line-height:1.12;
    letter-spacing:-.02em;
  }
  .hero-lead{
    margin:0;
    font-size:1.05rem;
    color:var(--muted);
    max-width:44rem;
  }
  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:22px;
  }
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:48px;
    padding:0 20px;
    border-radius:999px;
    border:1px solid transparent;
    font-weight:700;
    letter-spacing:.1px;
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
    white-space:nowrap;
  }
  .btn-primary{
    background:var(--primary);
    color:#fff;
    box-shadow:0 16px 28px rgba(74,120,216,.26);
  }
  .btn-primary:hover,
  .btn-primary:focus-visible{
    background:var(--primary-strong);
    transform:translateY(-1px);
    box-shadow:0 20px 34px rgba(74,120,216,.32);
    outline:none;
  }
  .btn-secondary{
    background:#fff;
    color:var(--primary-deep);
    border-color:rgba(74,120,216,.20);
    box-shadow: var(--shadow-sm);
  }
  .btn-secondary:hover,
  .btn-secondary:focus-visible{
    background:var(--primary-soft);
    transform:translateY(-1px);
    border-color:rgba(74,120,216,.32);
    outline:none;
  }
  .hero-points{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:18px;
  }
  .chip{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:9px 12px;
    border-radius:999px;
    background:#fff;
    border:1px solid var(--border);
    color:var(--muted);
    font-size:.9rem;
    font-weight:600;
    box-shadow: var(--shadow-sm);
  }
  .chip i{
    width:8px;
    height:8px;
    border-radius:50%;
    background:var(--primary);
    display:inline-block;
  }
  .hero-visual{
    display:grid;
    gap:16px;
    align-content:start;
  }
  .stats-grid{
    display:grid;
    grid-template-columns:repeat(2, minmax(0, 1fr));
    gap:14px;
  }
  .stat-card,
  .preview-card,
  .feature-card,
  .compare-card,
  .topic-card,
  .faq-card,
  .form-card,
  .info-card{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow: var(--shadow-sm);
  }
  .stat-card{
    padding:18px;
    min-height:110px;
  }
  .stat-label{
    font-size:.88rem;
    color:var(--muted);
    margin-bottom:8px;
  }
  .stat-value{
    font-size:1.55rem;
    font-weight:800;
    letter-spacing:-.02em;
  }
  .stat-note{
    margin-top:8px;
    color:var(--soft);
    font-size:.92rem;
  }
  .preview-card{
    overflow:hidden;
  }
  .preview-media{
    height:198px;
    background:
      linear-gradient(135deg, rgba(74,120,216,.18), rgba(126,166,239,.10)),
      linear-gradient(180deg, #edf4ff, #fff);
    position:relative;
  }
  .preview-media::before{
    content:"";
    position:absolute;
    inset:20px 20px auto auto;
    width:96px;
    height:96px;
    border-radius:28px;
    background: linear-gradient(145deg, rgba(255,255,255,.75), rgba(255,255,255,.35));
    box-shadow: inset 0 1px 0 rgba(255,255,255,.65), 0 12px 24px rgba(58,93,156,.12);
    transform: rotate(8deg);
  }
  .preview-content{
    padding:18px 18px 20px;
  }
  .preview-badge{
    display:inline-flex;
    align-items:center;
    padding:7px 10px;
    border-radius:999px;
    background:var(--primary-soft);
    color:var(--primary-deep);
    font-size:.82rem;
    font-weight:700;
  }
  .preview-title{
    margin:12px 0 8px;
    font-size:1.1rem;
    line-height:1.35;
  }
  .preview-text{
    margin:0;
    color:var(--muted);
    font-size:.95rem;
  }
  .section{
    padding:20px 0;
  }
  .section-head{
    display:flex;
    align-items:end;
    justify-content:space-between;
    gap:18px;
    margin-bottom:18px;
  }
  .section-title{
    margin:0;
    font-size:1.65rem;
    line-height:1.22;
    letter-spacing:-.02em;
  }
  .section-desc{
    margin:0;
    color:var(--muted);
    max-width:48rem;
    font-size:.98rem;
  }
  .section-tagline{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--primary-deep);
    background:var(--primary-soft);
    border-radius:999px;
    padding:8px 12px;
    font-size:.86rem;
    font-weight:700;
    flex:none;
  }
  .feature-grid{
    display:grid;
    grid-template-columns:repeat(4, minmax(0,1fr));
    gap:16px;
  }
  .feature-card{
    padding:20px;
    position:relative;
    overflow:hidden;
  }
  .feature-card.large{
    grid-column:span 2;
    min-height:220px;
    background:
      linear-gradient(180deg, #ffffff, #fbfdff),
      radial-gradient(circle at top right, rgba(74,120,216,.08), transparent 34%);
  }
  .feature-icon{
    width:48px;
    height:48px;
    border-radius:16px;
    display:grid;
    place-items:center;
    background:var(--primary-soft);
    color:var(--primary-deep);
    font-weight:800;
    margin-bottom:16px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.75);
  }
  .feature-card h3{
    margin:0 0 10px;
    font-size:1.1rem;
  }
  .feature-card p{
    margin:0;
    color:var(--muted);
    font-size:.95rem;
  }
  .tag-row{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-top:16px;
  }
  .tag{
    display:inline-flex;
    align-items:center;
    padding:7px 10px;
    border-radius:999px;
    background:#f5f8fe;
    border:1px solid rgba(74,120,216,.12);
    color:#44618e;
    font-size:.82rem;
    font-weight:700;
  }
  .feature-card.small{
    min-height:220px;
    background: linear-gradient(180deg, #fff, #fbfcff);
  }
  .feature-card.highlight{
    background:
      linear-gradient(180deg, #f7fbff, #ffffff);
    border-color: rgba(74,120,216,.18);
  }
  .compare-grid{
    display:grid;
    grid-template-columns:repeat(2, minmax(0,1fr));
    gap:16px;
  }
  .compare-card{
    padding:22px;
  }
  .compare-card h3{
    margin:0 0 8px;
    font-size:1.15rem;
  }
  .compare-card p{
    margin:0 0 18px;
    color:var(--muted);
    font-size:.95rem;
  }
  .metric{
    margin-bottom:16px;
  }
  .metric-top{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    margin-bottom:8px;
    color:var(--text);
    font-size:.92rem;
    font-weight:600;
  }
  .bar{
    height:10px;
    border-radius:999px;
    background:#e9eef7;
    overflow:hidden;
  }
  .bar > span{
    display:block;
    height:100%;
    border-radius:inherit;
    background:linear-gradient(90deg, var(--primary), #7ea6ef);
    box-shadow:0 8px 18px rgba(74,120,216,.18);
  }
  .compare-badges{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-top:18px;
  }
  .compare-badges .badge{
    padding:8px 10px;
    border-radius:999px;
    background:#f6f9ff;
    border:1px solid rgba(74,120,216,.12);
    color:#486182;
    font-size:.82rem;
    font-weight:700;
  }
  .compare-card.featured{
    background:
      linear-gradient(180deg, rgba(74,120,216,.06), rgba(255,255,255,.98));
  }
  .compare-side{
    display:grid;
    gap:14px;
    margin-top:8px;
  }
  .side-panel{
    padding:16px;
    border-radius:18px;
    background:var(--card-2);
    border:1px solid rgba(216,226,241,.95);
  }
  .side-panel strong{
    display:block;
    margin-bottom:8px;
  }
  .side-list{
    margin:0;
    padding:0;
    list-style:none;
    display:grid;
    gap:10px;
  }
  .side-list li{
    display:flex;
    gap:10px;
    align-items:flex-start;
    color:var(--muted);
    font-size:.93rem;
  }
  .side-list li::before{
    content:"";
    width:8px;
    height:8px;
    margin-top:.55rem;
    border-radius:50%;
    background:var(--primary);
    flex:none;
  }
  .updates-grid{
    display:grid;
    grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);
    gap:16px;
    align-items:start;
  }
  .updates-list{
    display:grid;
    gap:12px;
  }
  .update-item{
    display:grid;
    gap:12px;
    padding:18px;
    border-radius:22px;
    background:var(--card);
    border:1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  }
  .update-item:hover,
  .update-item:focus-within{
    transform:translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color:rgba(74,120,216,.22);
  }
  .update-meta{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    align-items:center;
    color:var(--soft);
    font-size:.84rem;
  }
  .update-meta .pill{
    display:inline-flex;
    align-items:center;
    padding:6px 10px;
    border-radius:999px;
    background:#f6f9ff;
    border:1px solid rgba(74,120,216,.12);
    color:#4b6a95;
    font-weight:700;
  }
  .update-title{
    font-size:1.04rem;
    line-height:1.45;
    font-weight:800;
  }
  .update-summary{
    color:var(--muted);
    font-size:.94rem;
    margin:0;
  }
  .update-link{
    display:flex;
    gap:12px;
    align-items:flex-start;
    justify-content:space-between;
  }
  .update-link:hover .update-title{
    color:var(--primary-deep);
  }
  .update-arrow{
    width:38px;
    height:38px;
    border-radius:14px;
    display:grid;
    place-items:center;
    background:var(--primary-soft);
    color:var(--primary-deep);
    flex:none;
    margin-top:1px;
    font-weight:900;
  }
  .empty-state{
    min-height:252px;
    display:grid;
    place-items:center;
    text-align:center;
    padding:34px;
    border:1px dashed rgba(74,120,216,.22);
    border-radius:24px;
    background:linear-gradient(180deg, #fff, #f8fbff);
    color:var(--muted);
    font-weight:700;
  }
  .update-sidebar{
    display:grid;
    gap:16px;
  }
  .info-card{
    padding:20px;
  }
  .info-card h3{
    margin:0 0 10px;
    font-size:1.08rem;
  }
  .info-card p{
    margin:0;
    color:var(--muted);
    font-size:.94rem;
  }
  .info-list{
    margin:14px 0 0;
    padding:0;
    list-style:none;
    display:grid;
    gap:10px;
  }
  .info-list li{
    display:flex;
    align-items:flex-start;
    gap:10px;
    color:var(--text);
    font-size:.93rem;
  }
  .info-list li::before{
    content:"";
    width:9px;
    height:9px;
    margin-top:.5rem;
    border-radius:50%;
    background:linear-gradient(180deg, var(--primary), #7ea6ef);
    box-shadow:0 0 0 4px rgba(74,120,216,.10);
    flex:none;
  }
  .info-actions{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:16px;
  }
  .topic-grid{
    display:grid;
    grid-template-columns:repeat(4, minmax(0,1fr));
    gap:16px;
  }
  .topic-card{
    padding:18px;
  }
  .topic-kicker{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:7px 10px;
    border-radius:999px;
    background:#f7faff;
    border:1px solid rgba(74,120,216,.12);
    color:#456289;
    font-size:.8rem;
    font-weight:700;
  }
  .topic-card h3{
    margin:14px 0 8px;
    font-size:1.05rem;
  }
  .topic-card p{
    margin:0;
    color:var(--muted);
    font-size:.92rem;
  }
  .topic-foot{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    margin-top:14px;
    color:var(--primary-deep);
    font-weight:700;
    font-size:.88rem;
  }
  .faq-list{
    display:grid;
    gap:12px;
  }
  .faq-list details{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:20px;
    box-shadow: var(--shadow-sm);
    overflow:hidden;
  }
  .faq-list 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(--text);
    transition: background-color var(--transition), color var(--transition);
  }
  .faq-list summary::-webkit-details-marker{ display:none; }
  .faq-list summary:hover{
    background:#f7faff;
    color:var(--primary-deep);
  }
  .faq-list summary::after{
    content:"+";
    width:28px;
    height:28px;
    border-radius:10px;
    display:grid;
    place-items:center;
    background:var(--primary-soft);
    color:var(--primary-deep);
    flex:none;
    font-size:1rem;
    font-weight:800;
    transition: transform var(--transition), background-color var(--transition);
  }
  .faq-list details[open] summary::after{
    content:"–";
    transform:rotate(0deg);
  }
  .faq-content{
    padding:0 20px 18px;
    color:var(--muted);
    font-size:.95rem;
  }
  .cta-grid{
    display:grid;
    grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);
    gap:16px;
    align-items:stretch;
  }
  .form-card{
    padding:22px;
  }
  .form-head{
    margin-bottom:18px;
  }
  .form-head h2{
    margin:0 0 8px;
    font-size:1.45rem;
  }
  .form-head p{
    margin:0;
    color:var(--muted);
    font-size:.96rem;
  }
  .form{
    display:grid;
    gap:14px;
  }
  .field-grid{
    display:grid;
    grid-template-columns:repeat(2, minmax(0,1fr));
    gap:12px;
  }
  .field{
    display:grid;
    gap:8px;
  }
  .field.full{
    grid-column:1 / -1;
  }
  label{
    font-size:.9rem;
    color:var(--text);
    font-weight:700;
  }
  input, textarea{
    width:100%;
    border:1px solid var(--border);
    background:#fff;
    border-radius:16px;
    padding:14px 15px;
    outline:none;
    transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition), transform var(--transition);
  }
  input::placeholder,
  textarea::placeholder{
    color:#93a2b8;
  }
  input:focus,
  textarea:focus{
    border-color:rgba(74,120,216,.48);
    box-shadow:0 0 0 4px rgba(74,120,216,.12);
  }
  textarea{
    min-height:128px;
    resize:vertical;
  }
  .form-actions{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    align-items:center;
    margin-top:4px;
  }
  .submit-btn{
    border:none;
    background:var(--primary);
    color:#fff;
    box-shadow:0 16px 28px rgba(74,120,216,.24);
  }
  .submit-btn:hover,
  .submit-btn:focus-visible{
    background:var(--primary-strong);
    transform:translateY(-1px);
    outline:none;
  }
  .form-note{
    color:var(--soft);
    font-size:.88rem;
  }
  .support-card{
    padding:22px;
    display:flex;
    flex-direction:column;
    gap:16px;
    background:
      linear-gradient(180deg, #f8fbff, #ffffff);
  }
  .support-card h3{
    margin:0;
    font-size:1.15rem;
  }
  .support-card p{
    margin:0;
    color:var(--muted);
  }
  .support-list{
    display:grid;
    gap:10px;
    margin:0;
    padding:0;
    list-style:none;
  }
  .support-list li{
    display:flex;
    gap:10px;
    align-items:flex-start;
    color:var(--text);
    font-size:.95rem;
  }
  .support-list li::before{
    content:"";
    width:9px;
    height:9px;
    margin-top:.52rem;
    border-radius:50%;
    background:var(--primary);
    box-shadow:0 0 0 4px rgba(74,120,216,.10);
    flex:none;
  }
  .footer{
    margin-top:26px;
    padding:26px 0 36px;
    border-top:1px solid rgba(216,226,241,.95);
    background:linear-gradient(180deg, rgba(248,251,255,.55), rgba(244,247,252,.95));
  }
  .footer-inner{
    display:grid;
    grid-template-columns:1.25fr .9fr .9fr;
    gap:20px;
    align-items:start;
  }
  .footer-brand{
    display:grid;
    gap:14px;
  }
  .footer-title{
    font-size:1.12rem;
    font-weight:800;
  }
  .footer-text{
    color:var(--muted);
    margin:0;
    font-size:.94rem;
    max-width:34rem;
  }
  .footer-col h4{
    margin:0 0 12px;
    font-size:1rem;
  }
  .footer-links{
    display:grid;
    gap:10px;
  }
  .footer-links a{
    color:var(--muted);
    font-weight:600;
    width:fit-content;
  }
  .footer-links a:hover,
  .footer-links a:focus-visible{
    color:var(--primary-deep);
    outline:none;
  }
  .footer-bottom{
    margin-top:20px;
    padding-top:18px;
    border-top:1px solid rgba(216,226,241,.9);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    flex-wrap:wrap;
    color:var(--soft);
    font-size:.9rem;
  }
  .focus-ring:focus-visible{
    outline:3px solid rgba(74,120,216,.24);
    outline-offset:2px;
  }
  @media (max-width: 1280px){
    .hero-inner{ grid-template-columns:1fr .95fr; }
    .feature-grid{ grid-template-columns:repeat(2, minmax(0,1fr)); }
    .topic-grid{ grid-template-columns:repeat(2, minmax(0,1fr)); }
  }
  @media (max-width: 1024px){
    .nav-links{ display:none; }
    .menu-toggle{ display:inline-flex; }
    .hero-inner,
    .updates-grid,
    .cta-grid{
      grid-template-columns:1fr;
    }
    .compare-grid{
      grid-template-columns:1fr;
    }
    .footer-inner{
      grid-template-columns:1fr 1fr;
    }
  }
  @media (max-width: 768px){
    .container{ width:min(100% - 28px, var(--container)); }
    .header-inner{ min-height:70px; gap:12px; }
    .brand-sub{ display:none; }
    .header-cta{ display:none; }
    .lang-pill{ display:none; }
    .hero{ padding-top:22px; }
    .hero-inner{ padding:22px; }
    .hero h1{ font-size:clamp(1.8rem, 8vw, 2.55rem); }
    .stats-grid{
      grid-template-columns:repeat(2, minmax(0,1fr));
    }
    .feature-grid,
    .topic-grid,
    .footer-inner{
      grid-template-columns:1fr;
    }
    .feature-card.large{
      grid-column:span 1;
    }
    .field-grid{
      grid-template-columns:1fr;
    }
    .section-head{
      flex-direction:column;
      align-items:flex-start;
    }
  }
  @media (max-width: 520px){
    .stats-grid{
      grid-template-columns:1fr 1fr;
      gap:10px;
    }
    .stat-card{
      padding:14px;
      min-height:auto;
    }
    .stat-value{
      font-size:1.25rem;
    }
    .preview-media{
      height:170px;
    }
    .hero-actions .btn{
      width:100%;
    }
    .compare-card,
    .feature-card,
    .topic-card,
    .form-card,
    .support-card,
    .info-card{
      padding:18px;
    }
    .faq-list summary{
      padding:16px 16px;
    }
    .faq-content{
      padding:0 16px 16px;
    }
    .footer-bottom{
      flex-direction:column;
      align-items:flex-start;
    }
  }

/* roulang page: article */
:root{
      --bg:#f5f8fc;
      --bg-soft:#edf3fb;
      --card:#ffffff;
      --card-2:#f9fbff;
      --text:#172033;
      --muted:#5f6f86;
      --soft:#7f90a8;
      --primary:#4a78d8;
      --primary-strong:#315db6;
      --primary-soft:#e8f0ff;
      --primary-deep:#25468f;
      --border:#d8e2f1;
      --shadow:0 18px 48px rgba(42, 73, 140, .12);
      --shadow-sm:0 8px 24px rgba(42, 73, 140, .08);
      --shadow-hover:0 24px 60px rgba(42, 73, 140, .16);
      --radius:24px;
      --radius-sm:16px;
      --radius-xs:12px;
      --container:1240px;
      --gap:24px;
      --gap-sm:16px;
      --line:1px solid var(--border);
      --transition:180ms ease;
    }
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Segoe UI",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(74,120,216,.10), transparent 32%),
        radial-gradient(circle at top right, rgba(113,158,214,.10), transparent 26%),
        linear-gradient(180deg, #fbfdff 0%, #f4f7fc 100%);
      line-height:1.75;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
      min-height:100vh;
      overflow-x:hidden;
    }
    *{box-sizing:border-box}
    ::selection{background:rgba(74,120,216,.16);color:var(--text)}
    a{
      color:inherit;
      text-decoration:none;
      transition:color var(--transition),transform var(--transition),background-color var(--transition),border-color var(--transition),box-shadow var(--transition),opacity var(--transition);
    }
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit;color:inherit}
    button{cursor:pointer}
    .container{
      width:min(var(--container), calc(100% - 40px));
      margin:0 auto;
    }
    .focus-ring:focus-visible,
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    select:focus-visible{
      outline:none;
      box-shadow:0 0 0 4px rgba(74,120,216,.14);
      border-color:rgba(74,120,216,.28);
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:100;
      backdrop-filter:blur(12px);
      background:rgba(250,252,255,.88);
      border-bottom:1px solid rgba(216,226,241,.9);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:14px;
      min-width:0;
    }
    .brand-mark{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:linear-gradient(145deg, #4f7fe1, #7ea6ef);
      color:#fff;
      box-shadow:0 10px 24px rgba(74,120,216,.28);
      font-weight:800;
      letter-spacing:.4px;
      flex:none;
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      min-width:0;
    }
    .brand-name{
      font-size:1rem;
      line-height:1.2;
      font-weight:800;
      letter-spacing:.2px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-sub{
      font-size:.85rem;
      color:var(--muted);
      margin-top:4px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .nav{
      display:flex;
      align-items:center;
      gap:8px;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:6px;
      padding:8px;
      border:var(--line);
      background:rgba(255,255,255,.72);
      border-radius:999px;
      box-shadow:var(--shadow-sm);
    }
    .nav-links a{
      padding:10px 14px;
      border-radius:999px;
      font-size:.95rem;
      color:var(--muted);
      font-weight:600;
      position:relative;
      white-space:nowrap;
    }
    .nav-links a:hover,
    .nav-links a:focus-visible{
      color:var(--primary-deep);
      background:var(--primary-soft);
      outline:none;
    }
    .nav-links a.active{
      background:var(--primary);
      color:#fff;
      box-shadow:0 10px 20px rgba(74,120,216,.22);
    }
    .lang-pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      height:44px;
      padding:0 14px;
      border-radius:999px;
      border:var(--line);
      background:#fff;
      box-shadow:var(--shadow-sm);
      color:var(--muted);
      font-weight:600;
      font-size:.92rem;
      flex:none;
      white-space:nowrap;
    }
    .lang-pill .dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 0 4px rgba(74,120,216,.12);
    }
    .header-cta{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      height:44px;
      padding:0 16px;
      border-radius:999px;
      border:1px solid transparent;
      background:var(--primary);
      color:#fff;
      font-weight:700;
      box-shadow:0 14px 26px rgba(74,120,216,.24);
      white-space:nowrap;
    }
    .header-cta:hover,
    .header-cta:focus-visible{
      background:var(--primary-strong);
      box-shadow:0 18px 34px rgba(74,120,216,.30);
      transform:translateY(-1px);
      outline:none;
    }
    .menu-toggle{
      display:none;
      width:46px;
      height:46px;
      border-radius:14px;
      border:var(--line);
      background:#fff;
      box-shadow:var(--shadow-sm);
      align-items:center;
      justify-content:center;
      gap:4px;
      flex-direction:column;
      padding:0;
    }
    .menu-toggle span{
      display:block;
      width:18px;
      height:2px;
      background:var(--primary-deep);
      border-radius:99px;
    }
    .mobile-drawer{
      position:fixed;
      inset:76px 0 auto 0;
      background:rgba(248,251,255,.98);
      border-bottom:1px solid var(--border);
      box-shadow:0 24px 42px rgba(25,35,54,.08);
      transform:translateY(-18px);
      opacity:0;
      pointer-events:none;
      transition:transform var(--transition),opacity var(--transition);
      z-index:99;
    }
    .mobile-drawer.open{
      transform:translateY(0);
      opacity:1;
      pointer-events:auto;
    }
    .drawer-inner{
      padding:18px 0 20px;
      display:grid;
      gap:14px;
    }
    .drawer-links{
      display:grid;
      gap:8px;
    }
    .drawer-links a{
      padding:14px 16px;
      border-radius:16px;
      background:#fff;
      border:1px solid var(--border);
      font-weight:600;
      color:var(--text);
      box-shadow:var(--shadow-sm);
    }
    .drawer-links a.active{
      background:var(--primary-soft);
      border-color:rgba(74,120,216,.22);
      color:var(--primary-deep);
    }
    .drawer-actions{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
    }
    .drawer-actions .lang-pill,
    .drawer-actions .header-cta{
      flex:1 1 180px;
      justify-content:center;
    }

    .page-main{
      padding:28px 0 64px;
    }

    .article-hero{
      padding:6px 0 18px;
    }
    .article-hero-shell{
      display:grid;
      grid-template-columns:minmax(0,1.18fr) minmax(320px,.82fr);
      gap:24px;
      align-items:stretch;
    }
    .article-hero-card{
      background:
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(249,252,255,.98)),
        radial-gradient(circle at top right, rgba(74,120,216,.08), transparent 30%);
      border:1px solid rgba(216,226,241,.95);
      border-radius:32px;
      box-shadow:var(--shadow);
      padding:32px;
      position:relative;
      overflow:hidden;
    }
    .article-hero-card::after{
      content:"";
      position:absolute;
      inset:auto -40px -50px auto;
      width:180px;
      height:180px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(74,120,216,.12), transparent 68%);
      pointer-events:none;
    }
    .article-breadcrumb{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      color:var(--muted);
      font-size:.92rem;
      margin-bottom:18px;
    }
    .article-breadcrumb a{
      color:var(--muted);
      font-weight:600;
    }
    .article-breadcrumb a:hover,
    .article-breadcrumb a:focus-visible{
      color:var(--primary-deep);
      outline:none;
    }
    .article-badge-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-bottom:18px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 12px;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary-deep);
      font-size:.84rem;
      font-weight:700;
      border:1px solid rgba(74,120,216,.14);
    }
    .badge.soft{
      background:#fff;
      color:var(--muted);
      border-color:var(--border);
    }
    .article-hero h1{
      margin:0;
      font-size:clamp(2rem, 4vw, 3.35rem);
      line-height:1.14;
      letter-spacing:-.02em;
    }
    .article-lead{
      margin:18px 0 0;
      color:var(--muted);
      font-size:1.05rem;
      max-width:66ch;
    }
    .article-meta-list{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:22px;
    }
    .meta-chip{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:10px 14px;
      background:#fff;
      border:1px solid var(--border);
      border-radius:999px;
      color:var(--muted);
      font-weight:600;
      font-size:.92rem;
      box-shadow:var(--shadow-sm);
    }
    .article-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:28px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:46px;
      padding:0 18px;
      border-radius:14px;
      border:1px solid transparent;
      font-weight:700;
      transition:transform var(--transition),box-shadow var(--transition),background-color var(--transition),border-color var(--transition),color var(--transition),opacity var(--transition);
      box-shadow:none;
      white-space:nowrap;
    }
    .btn-primary{
      background:var(--primary);
      color:#fff;
      box-shadow:0 14px 28px rgba(74,120,216,.22);
    }
    .btn-primary:hover,
    .btn-primary:focus-visible{
      background:var(--primary-strong);
      transform:translateY(-1px);
      box-shadow:0 18px 36px rgba(74,120,216,.28);
      outline:none;
    }
    .btn-primary:active{
      transform:translateY(0);
      box-shadow:0 12px 22px rgba(74,120,216,.20);
    }
    .btn-secondary{
      background:#fff;
      border-color:var(--border);
      color:var(--primary-deep);
    }
    .btn-secondary:hover,
    .btn-secondary:focus-visible{
      border-color:rgba(74,120,216,.28);
      background:var(--primary-soft);
      transform:translateY(-1px);
      outline:none;
    }
    .btn-ghost{
      background:transparent;
      border-color:var(--border);
      color:var(--text);
    }
    .btn-ghost:hover,
    .btn-ghost:focus-visible{
      border-color:rgba(74,120,216,.28);
      background:rgba(74,120,216,.06);
      transform:translateY(-1px);
      outline:none;
    }

    .article-hero-aside{
      display:grid;
      gap:16px;
    }
    .preview-card,
    .side-card,
    .empty-card,
    .article-card{
      background:var(--card);
      border:1px solid var(--border);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .preview-card{
      padding:0;
    }
    .preview-visual{
      position:relative;
      aspect-ratio:16/10;
      background:
        linear-gradient(135deg, rgba(74,120,216,.18), rgba(194,210,243,.32)),
        linear-gradient(180deg, #fff, #edf3fb);
      border-bottom:1px solid var(--border);
      display:flex;
      align-items:center;
      justify-content:center;
      overflow:hidden;
    }
    .preview-visual::before{
      content:"";
      position:absolute;
      inset:16px auto auto 16px;
      width:42%;
      height:42%;
      border-radius:24px;
      background:linear-gradient(135deg, rgba(255,255,255,.78), rgba(255,255,255,.18));
      border:1px solid rgba(255,255,255,.5);
      transform:rotate(-6deg);
    }
    .preview-visual::after{
      content:"";
      position:absolute;
      inset:auto 22px 18px auto;
      width:130px;
      height:130px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(74,120,216,.18), transparent 68%);
    }
    .preview-mark{
      position:absolute;
      left:18px;
      top:18px;
      z-index:2;
      background:rgba(255,255,255,.88);
      border:1px solid rgba(255,255,255,.72);
      border-radius:999px;
      padding:8px 12px;
      font-size:.84rem;
      font-weight:700;
      color:var(--primary-deep);
      box-shadow:var(--shadow-sm);
    }
    .preview-circle{
      width:76px;
      height:76px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:#fff;
      color:var(--primary);
      font-size:1.4rem;
      font-weight:800;
      box-shadow:0 12px 24px rgba(42,73,140,.18);
      border:1px solid rgba(255,255,255,.78);
      position:relative;
      z-index:2;
    }
    .preview-copy{
      padding:18px;
    }
    .preview-title{
      font-size:.98rem;
      font-weight:800;
    }
    .preview-copy p{
      margin:8px 0 0;
      color:var(--muted);
      line-height:1.65;
    }
    .stat-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:14px;
    }
    .stat-card{
      background:var(--card);
      border:1px solid var(--border);
      border-radius:22px;
      padding:16px;
      box-shadow:var(--shadow-sm);
      transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
    }
    .stat-card:hover{
      transform:translateY(-2px);
      border-color:rgba(74,120,216,.22);
      box-shadow:var(--shadow-hover);
    }
    .stat-value{
      font-size:1.5rem;
      font-weight:800;
      line-height:1.1;
      color:var(--primary-deep);
    }
    .stat-label{
      color:var(--muted);
      font-size:.88rem;
      margin-top:6px;
    }

    .article-layout{
      padding:18px 0 10px;
    }
    .article-grid{
      display:grid;
      grid-template-columns:minmax(0,1.45fr) minmax(290px,.55fr);
      gap:24px;
      align-items:start;
    }
    .article-card{
      overflow:hidden;
    }
    .article-content{
      padding:32px 34px;
      font-size:1.02rem;
      line-height:1.95;
      word-break:break-word;
    }
    .article-content > *:first-child{margin-top:0}
    .article-content > *:last-child{margin-bottom:0}
    .article-content h2,
    .article-content h3{
      margin:1.5em 0 .7em;
      line-height:1.28;
      letter-spacing:-.01em;
    }
    .article-content h2{font-size:1.48rem}
    .article-content h3{font-size:1.18rem}
    .article-content p{margin:0 0 1em}
    .article-content a{
      color:var(--primary-deep);
      text-decoration:underline;
      text-underline-offset:3px;
      text-decoration-thickness:1.5px;
    }
    .article-content ul,
    .article-content ol{
      margin:0 0 1em 1.2em;
      padding:0;
    }
    .article-content li + li{margin-top:.45em}
    .article-content blockquote{
      margin:1.4em 0;
      padding:18px 20px;
      background:var(--bg-soft);
      border-left:4px solid var(--primary);
      border-radius:18px;
      color:var(--text);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.8);
    }
    .article-content blockquote p{margin:0}
    .article-content img{
      max-width:100%;
      height:auto;
      border-radius:20px;
      margin:1.2em 0;
      box-shadow:var(--shadow-sm);
    }
    .article-content figure{
      margin:1.4em 0;
      padding:14px;
      background:var(--card-2);
      border:1px solid var(--border);
      border-radius:20px;
    }
    .article-content figcaption{
      margin-top:10px;
      color:var(--muted);
      font-size:.9rem;
    }
    .article-content pre{
      margin:1.4em 0;
      padding:18px;
      border-radius:18px;
      background:#0f172a;
      color:#e2e8f0;
      overflow:auto;
      box-shadow:var(--shadow-sm);
    }
    .article-content code{
      background:rgba(74,120,216,.08);
      padding:.18em .42em;
      border-radius:8px;
      font-size:.92em;
    }
    .article-content pre code{
      background:none;
      padding:0;
      color:inherit;
    }
    .article-content hr{
      border:none;
      border-top:1px solid var(--border);
      margin:1.8em 0;
    }
    .article-content table{
      width:100%;
      border-collapse:separate;
      border-spacing:0;
      margin:1.2em 0;
      overflow:hidden;
      border:1px solid var(--border);
      border-radius:18px;
      background:#fff;
    }
    .article-content th,
    .article-content td{
      padding:12px 14px;
      border-bottom:1px solid var(--border);
      text-align:left;
      vertical-align:top;
    }
    .article-content th{
      background:var(--bg-soft);
      color:var(--text);
      font-weight:700;
    }
    .article-content tr:last-child td{border-bottom:none}
    .article-content strong{color:var(--text)}
    .article-footer-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      padding:0 34px 34px;
    }

    .article-aside{
      position:sticky;
      top:96px;
      display:grid;
      gap:16px;
    }
    .side-card{
      padding:22px;
    }
    .side-card h3{
      margin:0 0 12px;
      font-size:1.05rem;
      line-height:1.35;
    }
    .side-text{
      margin:0;
      color:var(--muted);
      font-size:.95rem;
      line-height:1.7;
    }
    .info-list{
      display:grid;
      gap:10px;
      margin-top:14px;
    }
    .info-row{
      display:flex;
      justify-content:space-between;
      gap:16px;
      padding:12px 14px;
      background:var(--card-2);
      border:1px solid var(--border);
      border-radius:16px;
      font-size:.92rem;
    }
    .info-row span:first-child{color:var(--muted)}
    .info-row span:last-child{color:var(--text);font-weight:700}
    .link-stack{
      display:grid;
      gap:10px;
    }
    .stack-item{
      display:block;
      padding:14px 16px;
      background:var(--card-2);
      border:1px solid var(--border);
      border-radius:18px;
      transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition),background-color var(--transition);
    }
    .stack-item:hover,
    .stack-item:focus-visible{
      transform:translateY(-1px);
      box-shadow:var(--shadow-sm);
      border-color:rgba(74,120,216,.22);
      background:#fff;
      outline:none;
    }
    .stack-item strong{
      display:block;
      font-size:.96rem;
      margin-bottom:6px;
    }
    .stack-item small{
      display:block;
      color:var(--muted);
      line-height:1.55;
    }
    .note-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .note-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--muted);
      line-height:1.6;
    }
    .note-dot{
      width:8px;
      height:8px;
      border-radius:999px;
      background:var(--primary);
      margin-top:.6em;
      flex:none;
      box-shadow:0 0 0 4px rgba(74,120,216,.12);
    }

    .empty-section{
      padding:36px 0 20px;
    }
    .empty-card{
      max-width:760px;
      margin:0 auto;
      padding:36px;
      text-align:center;
    }
    .empty-card .empty-tag{
      display:inline-flex;
      padding:8px 12px;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary-deep);
      font-weight:700;
      font-size:.86rem;
      margin-bottom:18px;
    }
    .empty-card h1{
      margin:0;
      font-size:clamp(1.7rem,3vw,2.4rem);
      line-height:1.2;
    }
    .empty-card p{
      margin:14px auto 0;
      max-width:56ch;
      color:var(--muted);
    }
    .empty-card .btn{
      margin-top:24px;
    }

    .footer{
      margin-top:54px;
      border-top:1px solid rgba(216,226,241,.95);
      background:linear-gradient(180deg, rgba(249,251,255,.8), rgba(243,247,252,.96));
    }
    .footer-inner{
      display:grid;
      grid-template-columns:1.45fr .8fr .8fr;
      gap:24px;
      padding:34px 0 20px;
    }
    .footer-brand .footer-title{
      font-size:1.1rem;
      font-weight:800;
      margin-bottom:12px;
    }
    .footer-text{
      margin:0;
      color:var(--muted);
      line-height:1.8;
    }
    .footer-col h4{
      margin:0 0 14px;
      font-size:1rem;
    }
    .footer-links{
      display:grid;
      gap:10px;
    }
    .footer-links a{
      color:var(--muted);
      width:fit-content;
    }
    .footer-links a:hover,
    .footer-links a:focus-visible{
      color:var(--primary-deep);
      outline:none;
    }
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
      padding:16px 0 24px;
      color:var(--soft);
      font-size:.9rem;
      border-top:1px solid rgba(216,226,241,.7);
    }

    @media (max-width: 1180px){
      .article-hero-shell,
      .article-grid{
        grid-template-columns:1fr;
      }
      .article-aside{
        position:static;
      }
    }

    @media (max-width: 1024px){
      .nav-links,
      .header-cta{
        display:none;
      }
      .menu-toggle{
        display:flex;
      }
      .article-hero-card,
      .article-content,
      .side-card,
      .empty-card{
        border-radius:24px;
      }
      .footer-inner{
        grid-template-columns:1fr 1fr;
      }
      .footer-brand{
        grid-column:1 / -1;
      }
    }

    @media (max-width: 768px){
      .container{
        width:min(var(--container), calc(100% - 28px));
      }
      .header-inner{
        min-height:70px;
      }
      .brand-mark{
        width:42px;
        height:42px;
        border-radius:14px;
      }
      .brand-sub{
        display:none;
      }
      .page-main{
        padding-top:20px;
      }
      .article-hero-card{
        padding:24px;
      }
      .article-hero h1{
        font-size:clamp(1.8rem, 6vw, 2.6rem);
      }
      .article-lead{
        font-size:1rem;
      }
      .article-actions,
      .article-footer-actions{
        gap:10px;
      }
      .btn{
        width:100%;
      }
      .stat-grid{
        grid-template-columns:1fr 1fr;
      }
      .article-content{
        padding:24px;
        font-size:1rem;
      }
      .article-footer-actions{
        padding:0 24px 24px;
      }
      .footer-inner{
        grid-template-columns:1fr;
      }
      .footer-brand{
        grid-column:auto;
      }
      .mobile-drawer{
        inset:70px 0 auto 0;
      }
    }

    @media (max-width: 520px){
      .container{
        width:min(var(--container), calc(100% - 24px));
      }
      .lang-pill{
        padding:0 12px;
        gap:6px;
        font-size:.86rem;
      }
      .article-hero-card{
        padding:20px;
      }
      .article-breadcrumb{
        gap:8px;
        font-size:.88rem;
      }
      .article-badge-row,
      .article-meta-list{
        gap:8px;
      }
      .meta-chip{
        width:100%;
        justify-content:center;
      }
      .stat-grid{
        grid-template-columns:1fr;
      }
      .preview-visual{
        aspect-ratio:4/3;
      }
      .preview-circle{
        width:68px;
        height:68px;
      }
      .article-content{
        padding:20px;
        line-height:1.9;
      }
      .article-content h2{
        font-size:1.28rem;
      }
      .article-content h3{
        font-size:1.08rem;
      }
      .side-card,
      .empty-card{
        padding:20px;
      }
      .footer-bottom{
        flex-direction:column;
        align-items:flex-start;
      }
    }

    @media (prefers-reduced-motion: reduce){
      html{scroll-behavior:auto}
      *,
      *::before,
      *::after{
        animation-duration:.01ms !important;
        animation-iteration-count:1 !important;
        transition-duration:.01ms !important;
        scroll-behavior:auto !important;
      }
    }