/* roulang page: index */
:root{
      --bg:#f4f8fc;
      --bg-soft:#eef5ff;
      --surface:#ffffff;
      --surface-2:#f8fbff;
      --text:#0f172a;
      --muted:#526076;
      --muted-2:#7a8798;
      --border:#d9e4f2;
      --border-strong:#bfd2ea;
      --primary:#1d4ed8;
      --primary-2:#2563eb;
      --primary-soft:#dbeafe;
      --accent:#38bdf8;
      --success:#0f9d58;
      --warning:#f59e0b;
      --danger:#ef4444;
      --shadow:0 18px 50px rgba(15, 23, 42, .08);
      --shadow-2:0 10px 24px rgba(15, 23, 42, .06);
      --radius:22px;
      --radius-sm:16px;
      --radius-lg:28px;
      --container:1200px;
    }

    * { box-sizing: border-box; }
    html {
      scroll-behavior: smooth;
      background: radial-gradient(circle at top left, rgba(37,99,235,.08), transparent 30%),
                  radial-gradient(circle at top right, rgba(56,189,248,.08), transparent 25%),
                  var(--bg);
    }
    body{
      margin:0;
      min-height:100vh;
      color:var(--text);
      font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height:1.7;
      background:
        radial-gradient(circle at 10% 0%, rgba(37,99,235,.06), transparent 24%),
        radial-gradient(circle at 90% 10%, rgba(56,189,248,.06), transparent 20%),
        linear-gradient(180deg, #f8fbff 0%, #f4f8fc 45%, #eef5fb 100%);
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }
    a{
      color:inherit;
      text-decoration:none;
      transition: color .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
    }
    img{ max-width:100%; display:block; }
    button, input, textarea, select{
      font:inherit;
    }
    ::selection{
      background: rgba(29,78,216,.18);
      color: var(--text);
    }

    .site-shell{
      width:min(var(--container), calc(100% - 32px));
      margin:0 auto;
    }
    .section-pad{
      padding: 88px 0;
    }
    .section-pad-tight{
      padding: 72px 0;
    }
    .surface{
      background: rgba(255,255,255,.88);
      border:1px solid rgba(217,228,242,.88);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
    }
    .card{
      background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.98));
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-2);
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background-color .22s ease;
    }
    .card:hover{
      transform: translateY(-3px);
      box-shadow: 0 20px 38px rgba(15,23,42,.09);
      border-color: var(--border-strong);
    }
    .soft-border{
      border:1px solid rgba(217,228,242,.78);
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      padding:.42rem .82rem;
      border-radius:999px;
      background: linear-gradient(180deg, rgba(219,234,254,.95), rgba(239,246,255,.95));
      color: var(--primary);
      border: 1px solid rgba(191,219,254,.7);
      font-size:.86rem;
      font-weight:700;
      letter-spacing:.02em;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.32rem .64rem;
      border-radius:999px;
      font-size:.78rem;
      line-height:1;
      background: rgba(219,234,254,.85);
      color: #1e40af;
      border:1px solid rgba(191,219,254,.7);
      white-space:nowrap;
    }
    .badge-soft{
      background: rgba(248,250,252,.95);
      color:#475569;
      border-color: rgba(203,213,225,.9);
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      min-height:48px;
      padding:.78rem 1.15rem;
      border-radius: 14px;
      font-weight:700;
      border:1px solid transparent;
      cursor:pointer;
      transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease, opacity .18s ease;
      user-select:none;
    }
    .btn:active{
      transform: translateY(1px);
    }
    .btn:focus-visible,
    .nav-link:focus-visible,
    .chip:focus-visible,
    .input:focus-visible,
    summary:focus-visible,
    .menu-toggle:focus-visible{
      outline: 3px solid rgba(59,130,246,.22);
      outline-offset: 2px;
    }
    .btn-primary{
      background: linear-gradient(180deg, var(--primary-2), var(--primary));
      color: white;
      box-shadow: 0 12px 26px rgba(37,99,235,.22);
    }
    .btn-primary:hover{
      box-shadow: 0 16px 30px rgba(37,99,235,.28);
      transform: translateY(-1px);
    }
    .btn-secondary{
      background: rgba(255,255,255,.96);
      color: var(--primary);
      border-color: rgba(191,219,254,.95);
    }
    .btn-secondary:hover{
      background: rgba(239,246,255,.98);
      border-color: rgba(147,197,253,1);
      transform: translateY(-1px);
    }
    .btn-ghost{
      background: transparent;
      color: var(--muted);
      border-color: rgba(203,213,225,.85);
    }
    .btn-ghost:hover{
      background: rgba(248,250,252,.96);
      color: var(--text);
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.45rem .78rem;
      border-radius:999px;
      background: rgba(255,255,255,.9);
      border:1px solid rgba(203,213,225,.9);
      color: var(--muted);
      font-size:.9rem;
      line-height:1;
      box-shadow: 0 8px 18px rgba(15,23,42,.04);
    }
    .chip:hover{
      border-color: rgba(191,219,254,1);
      color: var(--text);
      transform: translateY(-1px);
    }
    .nav-link{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.62rem .88rem;
      border-radius:999px;
      color:#334155;
      border:1px solid transparent;
      font-weight:700;
      font-size:.94rem;
    }
    .nav-link:hover{
      color: var(--primary);
      background: rgba(239,246,255,.9);
      border-color: rgba(191,219,254,.9);
    }
    .nav-link.active{
      color: #0f172a;
      background: linear-gradient(180deg, rgba(219,234,254,.95), rgba(239,246,255,.95));
      border-color: rgba(191,219,254,.96);
    }
    .input{
      width:100%;
      min-height:48px;
      padding:.8rem 1rem;
      background: rgba(255,255,255,.96);
      border:1px solid rgba(203,213,225,.95);
      border-radius: 14px;
      color: var(--text);
      transition: border-color .18s ease, box-shadow .18s ease, background-color .18s ease;
    }
    .input::placeholder{ color:#94a3b8; }
    .input:hover{ border-color:#b7c8dd; }
    .input:focus{
      border-color: rgba(59,130,246,.88);
      box-shadow: 0 0 0 4px rgba(59,130,246,.12);
      background:#fff;
      outline:none;
    }
    .label{
      display:block;
      margin-bottom:.45rem;
      font-size:.92rem;
      color:#334155;
      font-weight:700;
    }
    .section-title{
      font-size: clamp(1.5rem, 2vw, 2.15rem);
      line-height:1.18;
      letter-spacing:-.02em;
      font-weight:800;
      color: var(--text);
    }
    .section-desc{
      color: var(--muted);
      font-size: 1rem;
      max-width: 70ch;
    }
    .hero-title{
      font-size: clamp(2.2rem, 4vw, 4.4rem);
      line-height:1.03;
      font-weight:900;
      letter-spacing:-.03em;
    }
    .hero-lead{
      font-size: clamp(1rem, 1.2vw, 1.12rem);
      color: var(--muted);
      max-width: 60ch;
    }
    .hero-grid{
      display:grid;
      gap: 1.5rem;
      align-items: stretch;
    }
    .coupon-wall{
      display:grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1rem;
    }
    .coupon{
      position:relative;
      overflow:hidden;
      padding: 1.15rem;
      background:
        radial-gradient(circle at top right, rgba(59,130,246,.12), transparent 35%),
        linear-gradient(180deg, #ffffff, #f8fbff);
      border:1px solid rgba(191,219,254,.9);
      border-radius: 24px;
      box-shadow: 0 16px 36px rgba(15,23,42,.08);
    }
    .coupon::before,
    .coupon::after{
      content:"";
      position:absolute;
      inset:auto;
      pointer-events:none;
    }
    .coupon::before{
      top: 16px;
      right: 16px;
      width: 72px;
      height: 72px;
      border-radius: 999px;
      background: radial-gradient(circle, rgba(59,130,246,.16), rgba(59,130,246,0) 70%);
    }
    .coupon::after{
      left:0;
      top:0;
      width:100%;
      height:8px;
      background: linear-gradient(90deg, #60a5fa, #38bdf8);
      opacity:.55;
    }
    .coupon.big{
      min-height: 312px;
      grid-row: span 2;
      background:
        radial-gradient(circle at 20% 10%, rgba(37,99,235,.18), transparent 38%),
        linear-gradient(180deg, #ffffff 0%, #f6faff 100%);
    }
    .coupon h3{
      font-weight:800;
      letter-spacing:-.02em;
      margin:.5rem 0 .35rem;
      font-size: 1.1rem;
    }
    .coupon .num{
      font-size: clamp(2rem, 4vw, 3rem);
      line-height:1;
      font-weight:900;
      letter-spacing:-.04em;
      color: var(--primary);
    }
    .coupon .meta{
      color: var(--muted);
      font-size:.92rem;
    }
    .coupon-cta{
      display:flex;
      gap:.65rem;
      flex-wrap:wrap;
      margin-top:1rem;
    }
    .mini-stats{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap:.8rem;
    }
    .mini-stat{
      padding: .95rem 1rem;
      background: rgba(255,255,255,.8);
      border:1px solid rgba(217,228,242,.9);
      border-radius: 18px;
    }
    .mini-stat .k{
      font-size:1.15rem;
      font-weight:900;
      color: var(--text);
      letter-spacing:-.02em;
    }
    .mini-stat .v{
      color: var(--muted);
      font-size:.85rem;
      margin-top:.15rem;
    }
    .plan-grid{
      display:grid;
      gap: 1rem;
      grid-template-columns: repeat(3, minmax(0,1fr));
    }
    .plan{
      padding: 1.25rem;
      position:relative;
      overflow:hidden;
    }
    .plan.featured{
      border-color: rgba(59,130,246,.35);
      box-shadow: 0 22px 44px rgba(37,99,235,.11);
      background:
        linear-gradient(180deg, rgba(239,246,255,.98), rgba(255,255,255,.98));
    }
    .plan .price{
      font-size: 1.95rem;
      line-height:1;
      font-weight:900;
      color: var(--primary);
      letter-spacing:-.03em;
    }
    .plan ul{
      margin: 1rem 0 1.15rem;
      padding:0;
      list-style:none;
      display:grid;
      gap:.65rem;
      color: var(--muted);
    }
    .plan li{
      display:flex;
      gap:.55rem;
      align-items:flex-start;
    }
    .plan li span{
      color: var(--primary);
      font-weight:900;
      flex:0 0 auto;
    }
    .pillar-grid{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 1rem;
      align-items: stretch;
    }
    .trust-strip{
      display:grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap:.85rem;
    }
    .trust-item{
      padding: 1rem;
      background: rgba(255,255,255,.92);
      border:1px solid rgba(217,228,242,.95);
      border-radius: 18px;
      min-height: 100%;
    }
    .trust-item .ico{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:40px;
      height:40px;
      border-radius: 12px;
      background: linear-gradient(180deg, rgba(219,234,254,.96), rgba(239,246,255,.96));
      color: var(--primary);
      margin-bottom:.85rem;
      font-weight:900;
    }
    .trust-item h4{
      font-size:1rem;
      font-weight:800;
      margin-bottom:.25rem;
    }
    .trust-item p{
      margin:0;
      color: var(--muted);
      font-size:.92rem;
      line-height:1.65;
    }
    .timeline{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 1rem;
    }
    .step{
      position:relative;
      padding: 1.2rem;
    }
    .step .stepno{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:42px;
      height:42px;
      border-radius: 14px;
      background: linear-gradient(180deg, var(--primary-2), var(--primary));
      color:#fff;
      font-weight:900;
      box-shadow: 0 10px 20px rgba(37,99,235,.2);
      margin-bottom:.9rem;
    }
    .step h4{
      font-size:1.04rem;
      font-weight:800;
      margin-bottom:.35rem;
    }
    .step p{
      margin:0;
      color: var(--muted);
      font-size:.94rem;
      line-height:1.7;
    }
    .news-layout{
      display:grid;
      grid-template-columns: 1.25fr .75fr;
      gap: 1rem;
      align-items:start;
    }
    .news-grid{
      display:grid;
      gap: 1rem;
      grid-template-columns: repeat(2, minmax(0,1fr));
    }
    .news-card{
      padding: 1.1rem;
      min-height: 100%;
      display:flex;
      flex-direction:column;
      gap:.8rem;
    }
    .news-card h3{
      font-size: 1.04rem;
      line-height:1.45;
      font-weight:800;
      letter-spacing:-.01em;
    }
    .news-card p{
      margin:0;
      color: var(--muted);
      font-size:.94rem;
      line-height:1.7;
    }
    .news-meta{
      margin-top:auto;
      display:flex;
      flex-wrap:wrap;
      gap:.55rem;
      align-items:center;
      justify-content:space-between;
      color: var(--muted-2);
      font-size:.86rem;
    }
    .news-side{
      display:grid;
      gap: 1rem;
    }
    .aside-box{
      padding: 1.15rem;
      border-radius: var(--radius);
      background: linear-gradient(180deg, rgba(248,251,255,.98), rgba(255,255,255,.98));
      border:1px solid rgba(217,228,242,.96);
      box-shadow: var(--shadow-2);
    }
    .aside-list{
      display:grid;
      gap:.7rem;
      margin-top:.85rem;
    }
    .aside-list a{
      display:flex;
      justify-content:space-between;
      align-items:flex-start;
      gap:.8rem;
      padding:.78rem .85rem;
      border-radius: 14px;
      background: rgba(255,255,255,.92);
      border:1px solid rgba(219,228,241,.95);
      color:#334155;
    }
    .aside-list a:hover{
      border-color: rgba(191,219,254,1);
      background: rgba(239,246,255,.88);
      transform: translateY(-2px);
    }
    .countdown{
      display:flex;
      flex-wrap:wrap;
      gap:.75rem;
      margin: 1rem 0 1.2rem;
    }
    .count-chip{
      min-width: 92px;
      padding: .95rem 1rem;
      text-align:center;
      background: rgba(255,255,255,.94);
      border:1px solid rgba(191,219,254,.95);
      border-radius: 18px;
      box-shadow: var(--shadow-2);
    }
    .count-chip strong{
      display:block;
      font-size: 1.35rem;
      line-height:1;
      font-weight:900;
      color: var(--primary);
      letter-spacing:-.02em;
    }
    .count-chip span{
      display:block;
      margin-top:.35rem;
      color: var(--muted);
      font-size:.86rem;
    }
    .faq-list{
      display:grid;
      gap:.85rem;
    }
    details.faq{
      background: rgba(255,255,255,.95);
      border:1px solid rgba(217,228,242,.95);
      border-radius: 18px;
      box-shadow: var(--shadow-2);
      overflow:hidden;
    }
    details.faq[open]{
      border-color: rgba(191,219,254,1);
    }
    details.faq summary{
      list-style:none;
      cursor:pointer;
      padding: 1rem 1.1rem;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:1rem;
      font-weight:800;
      color: var(--text);
    }
    details.faq summary::-webkit-details-marker{ display:none; }
    details.faq summary .arrow{
      flex:0 0 auto;
      width: 28px;
      height: 28px;
      border-radius: 999px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background: rgba(239,246,255,.95);
      color: var(--primary);
      transition: transform .2s ease;
    }
    details.faq[open] summary .arrow{
      transform: rotate(180deg);
    }
    details.faq .answer{
      padding: 0 1.1rem 1.1rem;
      color: var(--muted);
      line-height:1.8;
      font-size:.96rem;
    }
    .contact-grid{
      display:grid;
      grid-template-columns: 1fr .78fr;
      gap: 1rem;
      align-items:start;
    }
    .form-grid{
      display:grid;
      gap: .9rem;
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .field-wide{
      grid-column: 1 / -1;
    }
    textarea.input{
      min-height: 132px;
      resize: vertical;
    }
    .footer{
      margin-top: 0;
      padding: 44px 0 28px;
      background:
        radial-gradient(circle at top left, rgba(37,99,235,.08), transparent 22%),
        linear-gradient(180deg, rgba(255,255,255,.9), rgba(240,246,252,.98));
      border-top:1px solid rgba(217,228,242,.92);
    }
    .footer a{
      color: var(--muted);
    }
    .footer a:hover{
      color: var(--primary);
    }
    .footer-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr .9fr 1fr;
      gap: 1rem;
      align-items:start;
    }
    .footer-title{
      font-weight:800;
      margin-bottom:.75rem;
      color: var(--text);
    }
    .footer-list{
      display:grid;
      gap:.55rem;
    }
    .brand-mark{
      width: 44px;
      height: 44px;
      border-radius: 16px;
      background: linear-gradient(180deg, var(--primary-2), var(--primary));
      box-shadow: 0 12px 22px rgba(37,99,235,.24);
      color:#fff;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      font-weight:900;
      letter-spacing:-.04em;
    }
    .menu-toggle{
      width:48px;
      height:48px;
      border-radius:14px;
      border:1px solid rgba(203,213,225,.95);
      background:#fff;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      color:#334155;
      box-shadow: 0 8px 18px rgba(15,23,42,.04);
    }
    .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;
      padding:.75rem 1rem;
      background:#fff;
      border:2px solid var(--primary);
      border-radius: 12px;
      z-index:1000;
    }
    .subtle-grid{
      background-image:
        linear-gradient(rgba(148,163,184,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,184,.08) 1px, transparent 1px);
      background-size: 28px 28px;
      background-position: -1px -1px;
    }
    .stat-band{
      display:grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: .85rem;
    }
    .stat{
      padding: 1rem;
      border-radius: 18px;
      background: rgba(255,255,255,.92);
      border:1px solid rgba(217,228,242,.95);
      box-shadow: var(--shadow-2);
    }
    .stat strong{
      display:block;
      font-size: 1.45rem;
      line-height:1;
      font-weight:900;
      color: var(--primary);
      letter-spacing:-.03em;
    }
    .stat span{
      display:block;
      margin-top:.4rem;
      color: var(--muted);
      font-size:.88rem;
    }
    .highlight-box{
      padding: 1.15rem;
      border-radius: var(--radius);
      background: linear-gradient(180deg, rgba(239,246,255,.98), rgba(255,255,255,.98));
      border:1px solid rgba(191,219,254,.95);
      box-shadow: var(--shadow-2);
    }
    .highlight-box ul{
      margin:.9rem 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:.65rem;
      color: var(--muted);
    }
    .highlight-box li{
      display:flex;
      gap:.55rem;
      align-items:flex-start;
    }
    .highlight-box li span{
      color: var(--primary);
      font-weight:900;
      flex:0 0 auto;
    }
    .reveal{
      animation: fadeUp .5s ease both;
    }
    @keyframes fadeUp{
      from{ opacity:0; transform: translateY(10px); }
      to{ opacity:1; transform: translateY(0); }
    }

    @media (max-width: 1280px){
      .footer-grid{ grid-template-columns: 1fr 1fr; }
      .contact-grid,
      .news-layout,
      .pillar-grid{ grid-template-columns: 1fr; }
    }
    @media (max-width: 1024px){
      .plan-grid,
      .timeline,
      .trust-strip,
      .stat-band,
      .mini-stats{ grid-template-columns: repeat(2, minmax(0,1fr)); }
      .hero-grid{ grid-template-columns: 1fr; }
      .coupon.big{ min-height: 280px; }
      .news-grid{ grid-template-columns: 1fr; }
    }
    @media (max-width: 768px){
      .section-pad{ padding: 64px 0; }
      .section-pad-tight{ padding: 56px 0; }
      .footer-grid,
      .plan-grid,
      .timeline,
      .trust-strip,
      .stat-band,
      .mini-stats,
      .form-grid{ grid-template-columns: 1fr; }
      .coupon-wall{ grid-template-columns: 1fr; }
      .coupon.big{ grid-row: auto; min-height: auto; }
      .hero-title{ font-size: clamp(2rem, 9vw, 3rem); }
      .site-shell{ width:min(var(--container), calc(100% - 20px)); }
    }
    @media (max-width: 640px){
      .top-search{ display:none; }
      .hero-cta{ display:grid; grid-template-columns: 1fr; }
      .countdown{ justify-content:flex-start; }
      .count-chip{ min-width: calc(50% - .4rem); flex:1 1 calc(50% - .4rem); }
    }

/* roulang page: article */
:root{
      --bg:#f4f8fc;
      --bg-soft:#eef5ff;
      --surface:#ffffff;
      --surface-2:#f8fbff;
      --text:#0f172a;
      --muted:#526076;
      --muted-2:#7a8798;
      --border:#d9e4f2;
      --border-strong:#bfd2ea;
      --primary:#1d4ed8;
      --primary-2:#2563eb;
      --primary-soft:#dbeafe;
      --accent:#38bdf8;
      --success:#0f9d58;
      --warning:#f59e0b;
      --danger:#ef4444;
      --shadow:0 18px 50px rgba(15, 23, 42, .08);
      --shadow-2:0 10px 24px rgba(15, 23, 42, .06);
      --radius:22px;
      --radius-sm:16px;
      --radius-lg:28px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{
      scroll-behavior:smooth;
      background:
        radial-gradient(circle at top left, rgba(37,99,235,.08), transparent 30%),
        radial-gradient(circle at top right, rgba(56,189,248,.08), transparent 25%),
        var(--bg);
    }
    body{
      margin:0;
      min-height:100vh;
      color:var(--text);
      font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height:1.7;
      background:
        radial-gradient(circle at 10% 0%, rgba(37,99,235,.06), transparent 24%),
        radial-gradient(circle at 90% 10%, rgba(56,189,248,.06), transparent 20%),
        linear-gradient(180deg, #f8fbff 0%, #f4f8fc 45%, #eef5fb 100%);
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{
      color:inherit;
      text-decoration:none;
      transition: color .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease, opacity .2s ease;
    }
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(37,99,235,.18);color:#0f172a}
    .site-shell{
      width:min(calc(100% - 32px), var(--container));
      margin-inline:auto;
    }
    .section-pad{padding:88px 0}
    .section-pad-tight{padding:72px 0}
    .card{
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.98));
      border:1px solid var(--border);
      border-radius:var(--radius);
      box-shadow:var(--shadow-2);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease, background-color .22s ease;
    }
    .card:hover{
      transform:translateY(-3px);
      box-shadow:0 20px 38px rgba(15,23,42,.09);
      border-color:var(--border-strong);
    }
    .soft-border{border:1px solid rgba(217,228,242,.78)}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      padding:.42rem .82rem;
      border-radius:999px;
      background:linear-gradient(180deg, rgba(219,234,254,.95), rgba(239,246,255,.95));
      color:var(--primary);
      border:1px solid rgba(191,219,254,.7);
      font-size:.86rem;
      font-weight:700;
      letter-spacing:.02em;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.32rem .64rem;
      border-radius:999px;
      font-size:.78rem;
      line-height:1;
      background:rgba(219,234,254,.85);
      color:#1e40af;
      border:1px solid rgba(191,219,254,.7);
      white-space:nowrap;
    }
    .badge-soft{
      background:rgba(248,250,252,.95);
      color:#475569;
      border-color:rgba(203,213,225,.9);
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.45rem .78rem;
      border-radius:999px;
      background:rgba(255,255,255,.9);
      border:1px solid rgba(203,213,225,.9);
      color:var(--muted);
      font-size:.9rem;
      line-height:1;
      box-shadow:0 8px 18px rgba(15,23,42,.04);
    }
    .chip:hover{
      border-color:rgba(191,219,254,1);
      color:var(--text);
      transform:translateY(-1px);
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      min-height:48px;
      padding:.78rem 1.15rem;
      border-radius:14px;
      font-weight:700;
      border:1px solid transparent;
      cursor:pointer;
      transition:transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease, opacity .18s ease;
      user-select:none;
    }
    .btn:active{transform:translateY(1px)}
    .btn:focus-visible,
    .nav-link:focus-visible,
    .chip:focus-visible,
    .input:focus-visible,
    summary:focus-visible,
    .menu-toggle:focus-visible{
      outline:3px solid rgba(59,130,246,.22);
      outline-offset:2px;
    }
    .btn-primary{
      background:linear-gradient(180deg, var(--primary-2), var(--primary));
      color:#fff;
      box-shadow:0 12px 26px rgba(37,99,235,.22);
    }
    .btn-primary:hover{
      box-shadow:0 16px 30px rgba(37,99,235,.28);
      transform:translateY(-1px);
    }
    .btn-secondary{
      background:rgba(255,255,255,.96);
      color:var(--primary);
      border-color:rgba(191,219,254,.95);
    }
    .btn-secondary:hover{
      background:rgba(239,246,255,.98);
      border-color:rgba(147,197,253,1);
      transform:translateY(-1px);
    }
    .btn-ghost{
      background:transparent;
      color:var(--muted);
      border-color:rgba(203,213,225,.85);
    }
    .btn-ghost:hover{
      background:rgba(248,250,252,.96);
      color:var(--text);
    }
    .nav-link{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.62rem .88rem;
      border-radius:999px;
      color:#334155;
      border:1px solid transparent;
      font-weight:700;
      font-size:.94rem;
      white-space:nowrap;
    }
    .nav-link:hover{
      color:var(--primary);
      background:rgba(239,246,255,.9);
      border-color:rgba(191,219,254,.9);
    }
    .nav-link.active{
      color:#0f172a;
      background:linear-gradient(180deg, rgba(219,234,254,.95), rgba(239,246,255,.95));
      border-color:rgba(191,219,254,.96);
    }
    .input{
      width:100%;
      min-height:48px;
      padding:.8rem 1rem;
      background:rgba(255,255,255,.96);
      border:1px solid rgba(203,213,225,.95);
      border-radius:14px;
      color:var(--text);
      transition:border-color .18s ease, box-shadow .18s ease, background-color .18s ease;
    }
    .input::placeholder{color:#94a3b8}
    .input:hover{border-color:#b7c8dd}
    .input:focus{
      border-color:rgba(59,130,246,.88);
      box-shadow:0 0 0 4px rgba(59,130,246,.12);
      background:#fff;
      outline:none;
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter:blur(16px);
      background:rgba(244,248,252,.84);
      border-bottom:1px solid rgba(217,228,242,.8);
      box-shadow:0 8px 24px rgba(15,23,42,.04);
    }
    .header-strip{
      border-bottom:1px solid rgba(217,228,242,.72);
      background:linear-gradient(180deg, rgba(255,255,255,.68), rgba(255,255,255,.42));
    }
    .header-main{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:14px 0;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:42px;
      height:42px;
      border-radius:15px;
      background:linear-gradient(180deg, #3b82f6, #1d4ed8);
      color:#fff;
      font-weight:900;
      font-size:1.08rem;
      box-shadow:0 12px 24px rgba(37,99,235,.22);
      flex:0 0 auto;
    }
    .brand strong{
      display:block;
      line-height:1.1;
      font-size:1.02rem;
      letter-spacing:-.02em;
      font-weight:900;
      color:#0f172a;
    }
    .brand span{
      display:block;
      margin-top:4px;
      font-size:.84rem;
      color:var(--muted);
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      max-width:36ch;
    }
    .header-tools{
      display:flex;
      align-items:center;
      gap:12px;
      flex:1 1 auto;
      justify-content:flex-end;
      min-width:0;
    }
    .search-bar{
      display:flex;
      align-items:center;
      gap:10px;
      width:min(350px, 42vw);
      margin-left:auto;
    }
    .search-bar .input{
      min-height:44px;
      padding-left:1rem;
    }
    .menu-toggle{
      display:none;
      align-items:center;
      justify-content:center;
      width:46px;
      height:46px;
      border-radius:14px;
      border:1px solid rgba(203,213,225,.92);
      background:rgba(255,255,255,.96);
      color:#334155;
      box-shadow:0 8px 18px rgba(15,23,42,.05);
    }
    .mobile-panel{
      display:none;
      padding:0 0 16px;
    }
    .mobile-panel-inner{
      display:grid;
      gap:10px;
      padding:16px;
      border-top:1px solid rgba(217,228,242,.72);
      background:rgba(248,251,255,.88);
      border-radius:0 0 22px 22px;
    }
    .hero-shell{
      padding-top:24px;
    }
    .article-hero{
      padding:28px 0 18px;
    }
    .article-hero-panel{
      overflow:hidden;
      position:relative;
      padding:28px;
      border-radius:var(--radius-lg);
      background:
        radial-gradient(circle at top right, rgba(56,189,248,.16), transparent 22%),
        radial-gradient(circle at left bottom, rgba(37,99,235,.12), transparent 26%),
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,250,255,.98));
      border:1px solid rgba(217,228,242,.92);
      box-shadow:var(--shadow);
    }
    .article-hero-panel::after{
      content:"";
      position:absolute;
      inset:auto -16% -40% auto;
      width:320px;
      height:320px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(37,99,235,.08), transparent 66%);
      pointer-events:none;
    }
    .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:.45rem;
      font-size:.92rem;
      color:var(--muted);
    }
    .breadcrumb a{
      color:#334155;
    }
    .breadcrumb a:hover{
      color:var(--primary);
    }
    .article-title{
      margin:14px 0 0;
      font-size:clamp(2rem, 4vw, 3.2rem);
      line-height:1.14;
      letter-spacing:-.04em;
      font-weight:900;
      color:#0f172a;
      max-width:14ch;
    }
    .article-summary{
      margin-top:16px;
      font-size:1.05rem;
      line-height:1.95;
      color:var(--muted);
      max-width:62ch;
    }
    .meta-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:22px;
    }
    .hero-side{
      display:grid;
      gap:14px;
      align-content:start;
    }
    .mini-panel{
      padding:18px;
      border-radius:20px;
      background:rgba(248,251,255,.95);
      border:1px solid rgba(217,228,242,.9);
      box-shadow:0 10px 22px rgba(15,23,42,.04);
    }
    .mini-title{
      font-size:.92rem;
      font-weight:800;
      color:#0f172a;
    }
    .mini-list{
      display:grid;
      gap:10px;
      margin-top:12px;
    }
    .mini-item{
      display:flex;
      align-items:flex-start;
      gap:10px;
      color:var(--muted);
      font-size:.94rem;
      line-height:1.7;
    }
    .mini-dot{
      width:8px;
      height:8px;
      border-radius:999px;
      margin-top:.6rem;
      background:linear-gradient(180deg, var(--accent), var(--primary));
      flex:0 0 auto;
    }
    .article-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      gap:24px;
      align-items:start;
    }
    .article-content{
      padding:28px;
      overflow:hidden;
    }
    .article-body{
      font-size:1.05rem;
      line-height:1.95;
      color:#1e293b;
    }
    .article-body > * + *{margin-top:1.1rem}
    .article-body h2,
    .article-body h3,
    .article-body h4{
      color:#0f172a;
      line-height:1.28;
      letter-spacing:-.02em;
      scroll-margin-top:110px;
    }
    .article-body h2{
      margin-top:2.2rem;
      margin-bottom:.9rem;
      padding-left:1rem;
      border-left:4px solid var(--primary);
      font-size:1.55rem;
      font-weight:900;
    }
    .article-body h3{
      margin-top:1.8rem;
      margin-bottom:.7rem;
      font-size:1.18rem;
      font-weight:800;
    }
    .article-body p{
      margin:0;
      color:#334155;
    }
    .article-body ul,
    .article-body ol{
      margin:0;
      padding-left:1.2rem;
      color:#334155;
    }
    .article-body li{margin:.45rem 0}
    .article-body strong{
      color:#0f172a;
      font-weight:800;
    }
    .article-body a{
      color:var(--primary);
      text-decoration:underline;
      text-underline-offset:3px;
    }
    .article-body a:hover{color:var(--primary-2)}
    .article-body blockquote{
      margin:1.4rem 0;
      padding:1rem 1.15rem;
      border-left:4px solid rgba(37,99,235,.45);
      background:rgba(219,234,254,.46);
      border-radius:16px;
      color:#334155;
    }
    .article-body hr{
      border:none;
      border-top:1px solid rgba(203,213,225,.95);
      margin:1.8rem 0;
    }
    .article-body img,
    .article-body figure img{
      border-radius:18px;
      box-shadow:var(--shadow-2);
      border:1px solid var(--border);
    }
    .article-body figure{
      margin:1.6rem 0;
    }
    .article-body figcaption{
      margin-top:.6rem;
      font-size:.9rem;
      color:var(--muted-2);
      text-align:center;
    }
    .article-body table{
      width:100%;
      border-collapse:separate;
      border-spacing:0;
      overflow:hidden;
      border:1px solid var(--border);
      border-radius:18px;
      box-shadow:var(--shadow-2);
      background:#fff;
      margin:1.4rem 0;
    }
    .article-body th,
    .article-body td{
      padding:.8rem .95rem;
      border-bottom:1px solid rgba(217,228,242,.9);
      border-right:1px solid rgba(217,228,242,.9);
      text-align:left;
      vertical-align:top;
    }
    .article-body th:last-child,
    .article-body td:last-child{border-right:none}
    .article-body tr:last-child td{border-bottom:none}
    .article-body thead th{
      background:linear-gradient(180deg, rgba(239,246,255,.95), rgba(248,251,255,.98));
      color:#0f172a;
      font-weight:800;
    }
    .article-body pre{
      overflow:auto;
      padding:1rem 1.1rem;
      border-radius:18px;
      background:#0f172a;
      color:#e2e8f0;
      box-shadow:var(--shadow-2);
    }
    .article-body code{
      padding:.12rem .38rem;
      border-radius:8px;
      background:rgba(219,234,254,.7);
      color:#1d4ed8;
      font-size:.95em;
    }
    .article-body pre code{
      padding:0;
      border-radius:0;
      background:transparent;
      color:inherit;
    }
    .article-sidebar{
      position:sticky;
      top:110px;
      display:grid;
      gap:18px;
    }
    .side-card{
      padding:22px;
    }
    .side-title{
      font-size:1.02rem;
      font-weight:900;
      color:#0f172a;
      letter-spacing:-.02em;
    }
    .info-list{
      display:grid;
      gap:12px;
      margin-top:14px;
    }
    .info-item{
      display:flex;
      justify-content:space-between;
      gap:14px;
      padding-bottom:12px;
      border-bottom:1px dashed rgba(203,213,225,.88);
      color:var(--muted);
      font-size:.94rem;
    }
    .info-item:last-child{padding-bottom:0;border-bottom:none}
    .info-item strong{
      color:#0f172a;
      font-weight:800;
      text-align:right;
    }
    .tag-cloud{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:14px;
    }
    .tag-cloud .chip{
      background:rgba(248,251,255,.98);
    }
    .support-section{
      padding:0 0 72px;
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:18px;
      margin-bottom:18px;
    }
    .section-title{
      font-size:clamp(1.4rem, 2vw, 2.05rem);
      line-height:1.2;
      letter-spacing:-.03em;
      color:#0f172a;
      font-weight:900;
      margin:10px 0 0;
    }
    .section-desc{
      color:var(--muted);
      margin-top:8px;
      max-width:60ch;
    }
    .grid-3{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
    }
    .mini-card{
      padding:22px;
      display:grid;
      gap:12px;
    }
    .mini-card .num{
      width:44px;
      height:44px;
      border-radius:16px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:linear-gradient(180deg, rgba(219,234,254,.95), rgba(239,246,255,.98));
      color:var(--primary);
      font-weight:900;
      box-shadow:0 10px 22px rgba(37,99,235,.12);
    }
    .mini-card h3{
      margin:0;
      color:#0f172a;
      font-size:1.04rem;
      font-weight:900;
      letter-spacing:-.02em;
    }
    .mini-card p{
      margin:0;
      color:var(--muted);
      line-height:1.8;
    }
    .faq-list{
      display:grid;
      gap:14px;
    }
    .faq-item{
      overflow:hidden;
      padding:0;
    }
    .faq-item summary{
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:20px 22px;
      cursor:pointer;
      font-weight:800;
      color:#0f172a;
      user-select:none;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary .arrow{
      transition:transform .22s ease;
      color:var(--primary);
      flex:0 0 auto;
    }
    .faq-item[open] summary .arrow{transform:rotate(180deg)}
    .faq-answer{
      padding:0 22px 20px;
      color:var(--muted);
      line-height:1.9;
      border-top:1px solid rgba(217,228,242,.72);
    }
    .cta-panel{
      padding:28px;
      display:grid;
      grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);
      gap:18px;
      align-items:stretch;
    }
    .cta-aside{
      display:grid;
      gap:14px;
      align-content:start;
    }
    .form-grid{
      display:grid;
      gap:14px;
    }
    .field-label{
      display:block;
      margin-bottom:8px;
      font-size:.92rem;
      font-weight:700;
      color:#334155;
    }
    textarea.input{
      min-height:124px;
      resize:vertical;
    }
    .footer{
      margin-top:18px;
      padding:46px 0 30px;
      border-top:1px solid rgba(217,228,242,.88);
      background:linear-gradient(180deg, rgba(248,251,255,.82), rgba(244,248,252,.96));
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.3fr .8fr .8fr .9fr;
      gap:22px;
    }
    .footer-title{
      font-size:.98rem;
      font-weight:900;
      color:#0f172a;
      margin-bottom:14px;
      letter-spacing:-.02em;
    }
    .footer-list{
      display:grid;
      gap:10px;
      color:var(--muted);
    }
    .footer-list a:hover{
      color:var(--primary);
      transform:translateX(2px);
    }
    .footer-list span{
      line-height:1.8;
    }
    .footer-bottom{
      margin-top:26px;
      padding-top:18px;
      border-top:1px solid rgba(217,228,242,.9);
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      color:var(--muted);
      font-size:.94rem;
    }
    .empty-state{
      min-height:320px;
      display:grid;
      place-items:center;
      text-align:center;
      padding:40px 20px;
    }
    .empty-state .inner{
      max-width:42ch;
      display:grid;
      gap:14px;
      justify-items:center;
    }
    .empty-state h2{
      margin:0;
      font-size:1.55rem;
      font-weight:900;
      color:#0f172a;
    }
    .empty-state p{
      margin:0;
      color:var(--muted);
      line-height:1.9;
    }
    .divider-soft{
      height:1px;
      background:linear-gradient(90deg, transparent, rgba(203,213,225,.95), transparent);
      margin:18px 0;
    }
    .sticky-top-space{padding-top:18px}
    .hidden-scrollbar::-webkit-scrollbar{height:0;width:0}
    .hidden-scrollbar{scrollbar-width:none}
    @media (max-width: 1280px){
      .site-shell{width:min(calc(100% - 28px), var(--container))}
      .article-hero-panel{padding:24px}
      .article-layout{grid-template-columns:minmax(0,1fr) 300px}
    }
    @media (max-width: 1024px){
      .header-tools{gap:10px}
      .search-bar{width:min(300px, 44vw)}
      .article-layout{grid-template-columns:1fr}
      .article-sidebar{position:static; top:auto}
      .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
      .cta-panel{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1.1fr 1fr 1fr}
    }
    @media (max-width: 768px){
      .header-main{
        flex-wrap:wrap;
        gap:12px;
      }
      .header-tools{
        width:100%;
        justify-content:space-between;
      }
      .search-bar{width:100%}
      .desktop-nav{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-panel.open{display:block}
      .article-title{max-width:none}
      .article-hero-panel{padding:20px}
      .hero-actions,.meta-row{gap:10px}
      .grid-3{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-bottom{flex-direction:column;align-items:flex-start}
    }
    @media (max-width: 640px){
      .section-pad{padding:72px 0}
      .section-pad-tight{padding:56px 0}
      .site-shell{width:min(calc(100% - 20px), var(--container))}
      .brand span{max-width:24ch}
      .article-hero{padding:18px 0 14px}
      .article-content,.side-card,.cta-panel{padding:20px}
      .article-body{font-size:1rem}
      .article-body h2{font-size:1.32rem}
      .faq-item summary{padding:18px 18px}
      .faq-answer{padding:0 18px 18px}
      .footer-grid{grid-template-columns:1fr}
      .hero-side{grid-template-columns:1fr}
    }