/* roulang page: index */
:root{
      --bg: #060b16;
      --bg2: #0b1220;
      --panel: rgba(15,23,42,.72);
      --panel-strong: #0f172a;
      --line: rgba(148,163,184,.18);
      --text: #e5eefb;
      --muted: #9fb0c7;
      --brand: #f59e0b;
      --brand2: #f97316;
      --ok: #22c55e;
      --danger: #fb7185;
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --shadow: 0 24px 80px rgba(2,6,23,.45);
      --shadow-soft: 0 12px 30px rgba(2,6,23,.24);
    }
    html { scroll-behavior: smooth; }
    body{
      margin:0;
      color:var(--text);
      background:
        radial-gradient(1000px 500px at 20% 0%, rgba(245,158,11,.14), transparent 60%),
        radial-gradient(900px 420px at 85% 12%, rgba(249,115,22,.10), transparent 55%),
        linear-gradient(180deg, #07101e 0%, #050a13 100%);
      font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      line-height:1.7;
      overflow-x:hidden;
    }
    *{ box-sizing:border-box; }
    a{ color:inherit; text-decoration:none; }
    img{ max-width:100%; display:block; }
    button, input, textarea{
      font:inherit;
    }
    ::selection{ background: rgba(245,158,11,.35); color:#fff; }
    .container-wide{ width:min(1240px, calc(100% - 32px)); margin:0 auto; }
    .glass{
      background: linear-gradient(180deg, rgba(15,23,42,.76), rgba(15,23,42,.54));
      border:1px solid var(--line);
      box-shadow: var(--shadow-soft);
      backdrop-filter: blur(16px);
    }
    .card{
      background: linear-gradient(180deg, rgba(15,23,42,.78), rgba(15,23,42,.58));
      border:1px solid rgba(148,163,184,.16);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-soft);
    }
    .card-strong{
      background: linear-gradient(180deg, rgba(30,41,59,.96), rgba(15,23,42,.96));
      border:1px solid rgba(245,158,11,.22);
      box-shadow: var(--shadow-glow);
    }
    .section{
      padding: 28px 0;
    }
    .section-gap{
      margin-top: 26px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:.55rem;
      padding:.42rem .8rem;
      border-radius:999px;
      background: rgba(245,158,11,.12);
      border:1px solid rgba(245,158,11,.22);
      color:#fde68a;
      font-size:.86rem;
      letter-spacing:.03em;
      white-space:nowrap;
    }
    .eyebrow-dot{
      width:.5rem; height:.5rem; border-radius:999px;
      background: linear-gradient(135deg, #fde68a, #f59e0b);
      box-shadow: 0 0 0 6px rgba(245,158,11,.08);
    }
    .section-title{
      font-size: clamp(1.4rem, 2.2vw, 2.1rem);
      line-height:1.2;
      font-weight: 800;
      letter-spacing: -.02em;
      color:#f8fafc;
    }
    .section-desc{
      color: var(--muted);
      max-width: 72ch;
      margin-top: .8rem;
      font-size: 1rem;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      border-radius: 999px;
      padding: .9rem 1.2rem;
      border:1px solid transparent;
      transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
      font-weight: 700;
      cursor:pointer;
      white-space:nowrap;
      user-select:none;
    }
    .btn:hover{ transform: translateY(-1px); }
    .btn:active{ transform: translateY(0); }
    .btn:focus-visible, a:focus-visible, input:focus-visible, summary:focus-visible, button:focus-visible{
      outline: 3px solid rgba(251,191,36,.45);
      outline-offset: 2px;
    }
    .btn-primary{
      background: linear-gradient(135deg, #f59e0b, #fb923c);
      color:#111827;
      box-shadow: 0 14px 28px rgba(245,158,11,.24);
    }
    .btn-primary:hover{ box-shadow: 0 16px 34px rgba(245,158,11,.32); }
    .btn-ghost{
      background: rgba(15,23,42,.45);
      border-color: rgba(148,163,184,.22);
      color:#e2e8f0;
    }
    .btn-ghost:hover{
      background: rgba(15,23,42,.68);
      border-color: rgba(245,158,11,.22);
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.42rem .72rem;
      border-radius:999px;
      background: rgba(255,255,255,.04);
      border:1px solid rgba(148,163,184,.16);
      color:#dbe7f5;
      font-size:.84rem;
      line-height:1;
    }
    .chip.ok{ background: rgba(34,197,94,.10); border-color: rgba(34,197,94,.18); color:#bbf7d0; }
    .chip.warn{ background: rgba(245,158,11,.12); border-color: rgba(245,158,11,.24); color:#fde68a; }
    .pill-nav{
      overflow-x:auto;
      scrollbar-width:none;
      -ms-overflow-style:none;
    }
    .pill-nav::-webkit-scrollbar{ display:none; }
    .pill{
      display:inline-flex;
      align-items:center;
      padding:.62rem .95rem;
      border-radius:999px;
      border:1px solid rgba(148,163,184,.18);
      color:#cbd5e1;
      background: rgba(15,23,42,.46);
      transition: all .18s ease;
      white-space:nowrap;
      flex:0 0 auto;
    }
    .pill:hover{
      border-color: rgba(245,158,11,.28);
      color:#fff;
      background: rgba(245,158,11,.08);
      transform: translateY(-1px);
    }
    .pill.active{
      background: linear-gradient(135deg, rgba(245,158,11,.18), rgba(251,146,60,.16));
      border-color: rgba(245,158,11,.42);
      color:#fff;
      box-shadow: 0 10px 24px rgba(245,158,11,.12);
    }
    .mini-link{
      color:#cbd5e1;
      transition: color .18s ease;
    }
    .mini-link:hover{ color:#fde68a; }
    .news-link{
      display:block;
      padding: .95rem 1rem;
      border-radius: 18px;
      border:1px solid rgba(148,163,184,.16);
      background: rgba(15,23,42,.42);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .news-link:hover{
      transform: translateY(-1px);
      border-color: rgba(245,158,11,.22);
      background: rgba(15,23,42,.68);
    }
    .news-link h3{
      font-size: 1rem;
      line-height: 1.45;
      color:#f8fafc;
      font-weight: 700;
      margin:0;
    }
    .news-link p{
      margin:.38rem 0 0;
      color:var(--muted);
      font-size:.92rem;
    }
    .metric{
      border-radius: 20px;
      padding: 1rem 1rem 1.05rem;
      border: 1px solid rgba(148,163,184,.16);
      background: rgba(15,23,42,.54);
    }
    .metric .num{
      font-size: 1.8rem;
      line-height: 1;
      font-weight: 800;
      letter-spacing: -.03em;
      color:#fff;
    }
    .metric .label{
      margin-top:.32rem;
      color:var(--muted);
      font-size:.92rem;
    }
    .feature-card{
      border-radius: 22px;
      border: 1px solid rgba(148,163,184,.16);
      background: linear-gradient(180deg, rgba(15,23,42,.76), rgba(15,23,42,.56));
      padding: 1.2rem;
      box-shadow: var(--shadow-soft);
      height:100%;
    }
    .feature-card strong{ color:#fff; }
    .icon-badge{
      width: 3rem;
      height: 3rem;
      border-radius: 18px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background: linear-gradient(135deg, rgba(245,158,11,.22), rgba(249,115,22,.16));
      border: 1px solid rgba(245,158,11,.24);
      color:#fde68a;
      box-shadow: 0 10px 28px rgba(245,158,11,.10);
      flex-shrink:0;
    }
    .checklist{
      display:grid;
      gap:.85rem;
    }
    .check-item{
      display:flex;
      align-items:flex-start;
      gap:.8rem;
      padding:.95rem 1rem;
      border-radius: 18px;
      border: 1px solid rgba(148,163,184,.15);
      background: rgba(15,23,42,.42);
    }
    .check-item .t{ font-weight:700; color:#f8fafc; }
    .check-item .d{ color:var(--muted); font-size:.93rem; margin-top:.2rem; }
    .faq details{
      border-radius: 18px;
      border:1px solid rgba(148,163,184,.16);
      background: rgba(15,23,42,.45);
      padding: 1rem 1rem;
      transition: background .18s ease, border-color .18s ease;
    }
    .faq details[open]{
      background: rgba(15,23,42,.7);
      border-color: rgba(245,158,11,.22);
    }
    .faq summary{
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      font-weight:700;
      color:#f8fafc;
    }
    .faq summary::-webkit-details-marker{ display:none; }
    .faq .answer{
      margin-top:.8rem;
      color:var(--muted);
      font-size:.95rem;
    }
    .timeline{
      position:relative;
    }
    .timeline::before{
      content:'';
      position:absolute;
      left: 13px;
      top: 12px;
      bottom: 12px;
      width: 2px;
      background: linear-gradient(180deg, rgba(245,158,11,.8), rgba(148,163,184,.08));
    }
    .timeline-item{
      position:relative;
      padding-left: 42px;
    }
    .timeline-dot{
      position:absolute;
      left: 0;
      top: 8px;
      width: 28px;
      height: 28px;
      border-radius: 999px;
      background: #0f172a;
      border: 1px solid rgba(245,158,11,.28);
      box-shadow: 0 0 0 6px rgba(245,158,11,.08);
      display:flex;
      align-items:center;
      justify-content:center;
      color:#fde68a;
      font-weight:700;
      font-size:.78rem;
    }
    .footer-link{
      color:#cbd5e1;
      transition: color .18s ease;
    }
    .footer-link:hover{ color:#fde68a; }
    .hero-grid{
      display:grid;
      gap: 1rem;
      grid-template-columns: 1.08fr .92fr;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      border-radius: 30px;
    }
    .hero-panel::before{
      content:'';
      position:absolute;
      inset:-2px;
      background:
        radial-gradient(500px 220px at 15% 10%, rgba(245,158,11,.20), transparent 55%),
        radial-gradient(420px 240px at 88% 15%, rgba(249,115,22,.14), transparent 48%);
      pointer-events:none;
    }
    .hero-copy{
      position:relative;
      z-index:1;
    }
    .hero-title{
      font-size: clamp(2.2rem, 5vw, 4.2rem);
      line-height: .98;
      letter-spacing: -.05em;
      font-weight: 900;
      color:#fff;
    }
    .hero-lead{
      font-size: 1.04rem;
      color:#c7d2e1;
      max-width: 62ch;
    }
    .divider{
      height:1px;
      background: linear-gradient(90deg, transparent, rgba(148,163,184,.2), transparent);
    }
    .tab-row{
      display:flex;
      gap:.65rem;
      overflow-x:auto;
      padding-bottom:.15rem;
      scrollbar-width:none;
    }
    .tab-row::-webkit-scrollbar{ display:none; }
    .tab-row a{
      flex:0 0 auto;
    }
    .searchbar{
      display:flex;
      gap:.6rem;
      align-items:center;
      border-radius: 999px;
      padding: .38rem .42rem .38rem 1rem;
      background: rgba(15,23,42,.68);
      border:1px solid rgba(148,163,184,.18);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
    }
    .searchbar input{
      width:100%;
      background: transparent;
      border:none;
      color:#fff;
      outline:none;
      min-width:0;
    }
    .searchbar input::placeholder{ color:#8fa2bd; }
    .surface-note{
      background: rgba(15,23,42,.5);
      border:1px solid rgba(148,163,184,.14);
      border-radius: 20px;
    }
    .list-disc-custom{
      display:grid;
      gap:.8rem;
    }
    .list-disc-custom li{
      display:flex;
      gap:.7rem;
      align-items:flex-start;
      color:#d7e3f2;
    }
    .list-disc-custom li i{
      margin-top:.35rem;
      width:.55rem;
      height:.55rem;
      border-radius:999px;
      background: linear-gradient(135deg, #fde68a, #f59e0b);
      flex:0 0 auto;
      box-shadow: 0 0 0 5px rgba(245,158,11,.08);
    }
    @media (max-width: 1024px){
      .hero-grid{ grid-template-columns: 1fr; }
    }
    @media (max-width: 768px){
      .container-wide{ width:min(100% - 20px, 1240px); }
      .section{ padding: 20px 0; }
      .hero-title{ line-height:1.02; }
      .searchbar{ padding-left:.8rem; }
    }
    @media (max-width: 520px){
      .hero-title{ font-size: clamp(2rem, 11vw, 3rem); }
      .btn{ width:100%; }
      .mobile-stack > *{ width:100%; }
      .mobile-stack{ display:grid; gap:.7rem; }
    }