/* roulang page: index */
:root{
      --bg:#070814;
      --bg-soft:#0c1020;
      --card:#11162a;
      --card-2:#141b33;
      --line:rgba(255,255,255,.08);
      --line-strong:rgba(255,255,255,.14);
      --text:#f4f7ff;
      --muted:#a7b0c7;
      --muted-2:#7f8aa9;
      --brand:#8b5cf6;
      --brand-2:#22d3ee;
      --brand-3:#f97316;
      --success:#34d399;
      --danger:#fb7185;
      --shadow:0 18px 60px rgba(0,0,0,.35);
      --shadow-soft:0 10px 30px rgba(0,0,0,.25);
      --radius:22px;
      --radius-sm:16px;
      --radius-xs:12px;
      --container:1180px;
      --gap:24px;
      --gap-sm:16px;
      --gap-xs:10px;
      --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",Segoe UI,Roboto,Helvetica,Arial,sans-serif;
      background:
        radial-gradient(1000px 500px at 20% -10%, rgba(139,92,246,.24), transparent 55%),
        radial-gradient(900px 500px at 85% 15%, rgba(34,211,238,.16), transparent 50%),
        linear-gradient(180deg, #060711 0%, #090c18 52%, #060711 100%);
      color:var(--text);
      line-height:1.65;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(139,92,246,.35);color:#fff}
    .container{
      width:min(calc(100% - 32px), var(--container));
      margin:0 auto;
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:40;
      backdrop-filter:saturate(180%) blur(18px);
      background:rgba(7,8,20,.72);
      border-bottom:1px solid rgba(255,255,255,.06);
    }
    .nav{
      min-height:76px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      width:44px;
      height:44px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:
        linear-gradient(135deg, rgba(139,92,246,.95), rgba(34,211,238,.82));
      box-shadow:0 14px 34px rgba(139,92,246,.28);
      flex:0 0 auto;
      position:relative;
      overflow:hidden;
    }
    .brand-mark::after{
      content:"18+";
      font-size:14px;
      font-weight:800;
      letter-spacing:.04em;
      color:#fff;
    }
    .brand-text{
      min-width:0;
    }
    .brand-text strong{
      display:block;
      font-size:1.02rem;
      line-height:1.15;
      letter-spacing:.02em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-text span{
      display:block;
      color:var(--muted);
      font-size:.82rem;
      margin-top:3px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
    }
    .nav-links a{
      position:relative;
      color:var(--muted);
      padding:10px 14px;
      border-radius:999px;
      transition:transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
      border:1px solid transparent;
    }
    .nav-links a:hover,
    .nav-links a:focus-visible{
      color:#fff;
      background:rgba(255,255,255,.05);
      border-color:rgba(255,255,255,.08);
      transform:translateY(-1px);
      outline:none;
    }
    .nav-links a.active{
      color:#fff;
      background:linear-gradient(135deg, rgba(139,92,246,.18), rgba(34,211,238,.12));
      border-color:rgba(139,92,246,.22);
      box-shadow:0 8px 24px rgba(139,92,246,.14);
    }
    .nav-cta{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:11px 16px;
      border-radius:999px;
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      color:#fff;
      border:0;
      cursor:pointer;
      box-shadow:0 16px 30px rgba(34,211,238,.16);
      transition:transform var(--transition), box-shadow var(--transition), filter var(--transition);
    }
    .nav-cta:hover,
    .nav-cta:focus-visible{
      transform:translateY(-1px);
      box-shadow:0 20px 38px rgba(139,92,246,.22);
      outline:none;
      filter:saturate(1.08);
    }

    .hero{
      position:relative;
      padding:28px 0 18px;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.08);
      border-radius:28px;
      background:
        linear-gradient(180deg, rgba(6,7,17,.18), rgba(6,7,17,.76)),
        url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
      box-shadow:var(--shadow);
      min-height:580px;
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(135deg, rgba(6,7,17,.18), rgba(6,7,17,.38) 52%, rgba(6,7,17,.68)),
        radial-gradient(800px 320px at 20% 18%, rgba(139,92,246,.24), transparent 50%),
        radial-gradient(520px 320px at 76% 30%, rgba(34,211,238,.18), transparent 52%);
      pointer-events:none;
    }
    .hero-inner{
      position:relative;
      z-index:1;
      display:grid;
      grid-template-columns:1.2fr .9fr;
      gap:28px;
      align-items:end;
      padding:44px;
      min-height:580px;
    }
    .hero-copy{
      max-width:720px;
      padding-bottom:8px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 14px;
      border-radius:999px;
      background:rgba(7,8,20,.44);
      border:1px solid rgba(255,255,255,.12);
      color:#e6eaff;
      font-size:.92rem;
      margin-bottom:18px;
      backdrop-filter:blur(10px);
    }
    .eyebrow i{
      width:8px;height:8px;border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 5px rgba(52,211,153,.14);
      display:inline-block;
    }
    h1{
      margin:0;
      font-size:clamp(2.25rem, 5vw, 4.6rem);
      line-height:1.02;
      letter-spacing:-.04em;
      text-wrap:balance;
    }
    .hero-copy p{
      margin:18px 0 0;
      max-width:62ch;
      color:#e9ecf8;
      font-size:1.05rem;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:28px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:48px;
      padding:0 18px;
      border-radius:999px;
      border:1px solid transparent;
      cursor:pointer;
      transition:transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
      user-select:none;
    }
    .btn-primary{
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      color:#fff;
      box-shadow:0 18px 34px rgba(139,92,246,.22);
    }
    .btn-primary:hover,
    .btn-primary:focus-visible{
      transform:translateY(-1px);
      box-shadow:0 20px 38px rgba(34,211,238,.18);
      outline:none;
    }
    .btn-ghost{
      background:rgba(255,255,255,.04);
      color:#fff;
      border-color:rgba(255,255,255,.10);
    }
    .btn-ghost:hover,
    .btn-ghost:focus-visible{
      transform:translateY(-1px);
      border-color:rgba(255,255,255,.18);
      background:rgba(255,255,255,.07);
      outline:none;
    }

    .hero-side{
      display:grid;
      gap:14px;
      align-self:stretch;
      justify-items:stretch;
    }
    .glass-card{
      background:linear-gradient(180deg, rgba(17,22,42,.88), rgba(12,16,32,.86));
      border:1px solid rgba(255,255,255,.08);
      border-radius:24px;
      box-shadow:var(--shadow-soft);
      backdrop-filter:blur(18px);
    }
    .age-card{
      padding:18px;
    }
    .age-badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:6px 12px;
      border-radius:999px;
      background:rgba(251,113,133,.12);
      color:#ffc8d2;
      font-weight:700;
      font-size:.9rem;
      border:1px solid rgba(251,113,133,.18);
    }
    .age-card h2{
      margin:14px 0 8px;
      font-size:1.18rem;
      line-height:1.35;
    }
    .age-card p{
      margin:0;
      color:var(--muted);
      font-size:.96rem;
    }
    .mini-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0, 1fr));
      gap:14px;
    }
    .mini{
      padding:18px;
      min-height:120px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      overflow:hidden;
      position:relative;
    }
    .mini::before{
      content:"";
      position:absolute;
      inset:auto -24px -24px auto;
      width:110px;height:110px;
      background:radial-gradient(circle at center, rgba(139,92,246,.20), transparent 70%);
      pointer-events:none;
    }
    .mini strong{
      font-size:1.5rem;
      letter-spacing:-.03em;
    }
    .mini span{
      color:var(--muted);
      font-size:.92rem;
    }

    .strip{
      margin-top:22px;
      display:grid;
      grid-template-columns:repeat(3, minmax(0, 1fr));
      gap:14px;
    }
    .strip-item{
      padding:18px;
      border-radius:22px;
      background:linear-gradient(180deg, rgba(20,27,51,.92), rgba(17,22,42,.92));
      border:1px solid rgba(255,255,255,.08);
      display:flex;
      gap:14px;
      align-items:flex-start;
    }
    .strip-icon{
      width:42px;height:42px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(139,92,246,.22), rgba(34,211,238,.16));
      color:#fff;
      border:1px solid rgba(255,255,255,.08);
      flex:0 0 auto;
    }
    .strip-item strong{
      display:block;
      font-size:1rem;
      margin-bottom:4px;
    }
    .strip-item p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
    }

    main{padding:14px 0 60px}
    .section{
      margin-top:28px;
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:end;
      gap:18px;
      margin-bottom:16px;
    }
    .section-head h2{
      margin:0;
      font-size:1.55rem;
      line-height:1.2;
      letter-spacing:-.02em;
    }
    .section-head p{
      margin:0;
      color:var(--muted);
      max-width:66ch;
      font-size:.98rem;
    }
    .section-chip{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      color:#d9def1;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(255,255,255,.08);
      font-size:.9rem;
      white-space:nowrap;
    }

    .cards-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:var(--gap);
    }
    .feature-card,
    .content-card,
    .info-card,
    .faq-item,
    .cta-card,
    .update-card{
      background:linear-gradient(180deg, rgba(17,22,42,.94), rgba(12,16,32,.94));
      border:1px solid rgba(255,255,255,.08);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .feature-card{
      padding:22px;
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }
    .feature-card:hover{
      transform:translateY(-3px);
      border-color:rgba(139,92,246,.2);
      box-shadow:0 18px 42px rgba(0,0,0,.34);
    }
    .feature-top{
      display:flex;
      justify-content:space-between;
      gap:12px;
      align-items:flex-start;
      margin-bottom:18px;
    }
    .feature-icon{
      width:48px;
      height:48px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(139,92,246,.22), rgba(34,211,238,.16));
      border:1px solid rgba(255,255,255,.08);
      box-shadow:0 10px 22px rgba(0,0,0,.18);
      font-size:1.2rem;
    }
    .feature-card h3{
      margin:0;
      font-size:1.08rem;
      line-height:1.35;
    }
    .feature-card p{
      margin:8px 0 0;
      color:var(--muted);
      font-size:.95rem;
    }

    .content-layout{
      display:grid;
      grid-template-columns:1.08fr .92fr;
      gap:var(--gap);
      align-items:start;
    }
    .content-card{
      overflow:hidden;
    }
    .content-media{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .content-media img{
      width:100%;
      height:100%;
      object-fit:cover;
      transform:scale(1.02);
      transition:transform 380ms ease, filter 380ms ease;
      filter:saturate(1.02) contrast(1.02);
    }
    .content-card:hover .content-media img{
      transform:scale(1.06);
      filter:saturate(1.1) contrast(1.05);
    }
    .content-overlay{
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(6,7,17,.02), rgba(6,7,17,.72));
      display:flex;
      align-items:end;
      padding:18px;
    }
    .tag-row{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 10px;
      border-radius:999px;
      background:rgba(7,8,20,.54);
      color:#eef1ff;
      border:1px solid rgba(255,255,255,.10);
      font-size:.85rem;
      backdrop-filter:blur(8px);
    }
    .content-body{
      padding:22px;
    }
    .content-body h3{
      margin:0 0 10px;
      font-size:1.22rem;
      line-height:1.35;
    }
    .content-body p{
      margin:0;
      color:var(--muted);
    }
    .bullet-list{
      margin:18px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:10px;
    }
    .bullet-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:#e7ebf8;
    }
    .bullet-list li::before{
      content:"";
      width:10px;
      height:10px;
      margin-top:.4em;
      border-radius:50%;
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      box-shadow:0 0 0 5px rgba(139,92,246,.12);
      flex:0 0 auto;
    }

    .side-stack{
      display:grid;
      gap:14px;
    }
    .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:.95rem;
    }
    .info-list{
      margin:16px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
    }
    .info-list li{
      display:flex;
      justify-content:space-between;
      gap:16px;
      align-items:flex-start;
      padding:12px 0;
      border-top:1px solid rgba(255,255,255,.06);
      color:#eef2ff;
    }
    .info-list li:first-child{border-top:0;padding-top:0}
    .info-list strong{display:block}
    .info-list span{color:var(--muted);font-size:.92rem}

    .updates-wrap{
      display:grid;
      gap:14px;
    }
    .update-card{
      padding:18px;
    }
    .update-list{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
    }
    .update-list li{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:14px;
      align-items:start;
      padding:14px 0;
      border-top:1px solid rgba(255,255,255,.07);
    }
    .update-list li:first-child{border-top:0;padding-top:0}
    .update-mark{
      width:12px;
      height:12px;
      margin-top:.42em;
      border-radius:50%;
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      box-shadow:0 0 0 5px rgba(139,92,246,.14);
    }
    .update-main h3{
      margin:0 0 6px;
      font-size:1rem;
      line-height:1.45;
    }
    .update-main h3 a:hover,
    .update-main h3 a:focus-visible{
      color:#fff;
      text-decoration:underline;
      outline:none;
    }
    .update-main p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
    }
    .update-meta{
      text-align:right;
      color:var(--muted-2);
      font-size:.86rem;
      white-space:nowrap;
    }
    .update-meta .cat{
      display:block;
      color:#cdd5f0;
      margin-bottom:4px;
    }

    .image-grid{
      display:grid;
      grid-template-columns:repeat(4, minmax(0,1fr));
      gap:14px;
    }
    .image-tile{
      overflow:hidden;
      border-radius:22px;
      border:1px solid rgba(255,255,255,.08);
      position:relative;
      background:var(--card);
      box-shadow:var(--shadow-soft);
      min-height:240px;
    }
    .image-tile img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform 360ms ease;
    }
    .image-tile:hover img{
      transform:scale(1.05);
    }
    .image-caption{
      position:absolute;
      inset:auto 12px 12px 12px;
      padding:12px 14px;
      border-radius:16px;
      background:rgba(7,8,20,.62);
      border:1px solid rgba(255,255,255,.10);
      color:#f5f7ff;
      backdrop-filter:blur(10px);
      font-size:.94rem;
    }

    .faq-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:14px;
    }
    .faq-item{
      overflow:hidden;
    }
    .faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:20px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      font-weight:700;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{
      content:"+";
      width:34px;height:34px;
      display:grid;place-items:center;
      border-radius:999px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      color:#fff;
      flex:0 0 auto;
      transition:transform var(--transition), background var(--transition);
    }
    .faq-item[open] summary::after{
      content:"–";
      background:rgba(139,92,246,.16);
      transform:rotate(0deg);
    }
    .faq-content{
      padding:0 20px 20px;
      color:var(--muted);
    }

    .cta-card{
      padding:24px;
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
      align-items:center;
      background:
        radial-gradient(700px 220px at 10% 20%, rgba(139,92,246,.18), transparent 55%),
        linear-gradient(180deg, rgba(17,22,42,.96), rgba(12,16,32,.96));
    }
    .cta-card h2{
      margin:0 0 10px;
      font-size:1.55rem;
      line-height:1.2;
    }
    .cta-card p{
      margin:0;
      color:var(--muted);
    }
    .cta-form{
      display:flex;
      gap:10px;
      align-items:center;
      justify-content:flex-end;
      flex-wrap:wrap;
    }
    .field{
      flex:1 1 240px;
      min-width:0;
      display:flex;
      flex-direction:column;
      gap:8px;
    }
    .field label{
      color:#dbe2f7;
      font-size:.92rem;
    }
    .field input{
      width:100%;
      border-radius:14px;
      border:1px solid rgba(255,255,255,.10);
      background:rgba(255,255,255,.04);
      color:#fff;
      padding:14px 14px;
      outline:none;
      transition:border-color var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .field input::placeholder{color:#8692b3}
    .field input:focus{
      border-color:rgba(139,92,246,.55);
      box-shadow:0 0 0 4px rgba(139,92,246,.14);
      background:rgba(255,255,255,.06);
    }
    .small-note{
      margin-top:10px;
      color:var(--muted-2);
      font-size:.88rem;
    }

    .site-footer{
      margin-top:34px;
      padding:28px 0 38px;
      border-top:1px solid rgba(255,255,255,.08);
      background:linear-gradient(180deg, rgba(6,7,17,.2), rgba(6,7,17,.8));
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:22px;
      align-items:start;
    }
    .footer-brand{
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .footer-brand strong{
      font-size:1.06rem;
    }
    .footer-brand p{
      margin:0;
      color:var(--muted);
      max-width:68ch;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      justify-content:flex-end;
    }
    .footer-links a{
      padding:10px 14px;
      border-radius:999px;
      color:#d6dcf1;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.03);
      transition:background var(--transition), transform var(--transition), border-color var(--transition);
    }
    .footer-links a:hover,
    .footer-links a:focus-visible{
      background:rgba(255,255,255,.06);
      border-color:rgba(255,255,255,.14);
      transform:translateY(-1px);
      outline:none;
    }
    .copyright{
      margin-top:18px;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.06);
      color:var(--muted-2);
      font-size:.92rem;
      display:flex;
      flex-wrap:wrap;
      gap:10px 18px;
      justify-content:space-between;
    }
    .copyright a{color:#d9def1}

    .section-divider{
      height:1px;
      background:linear-gradient(90deg, transparent, rgba(255,255,255,.12), transparent);
      margin:24px 0 0;
    }

    @media (max-width: 1024px){
      .hero-inner{
        grid-template-columns:1fr;
        align-items:start;
        min-height:auto;
      }
      .hero-panel{min-height:auto}
      .cards-grid,
      .image-grid{
        grid-template-columns:repeat(2, minmax(0, 1fr));
      }
      .content-layout,
      .cta-card,
      .footer-grid{
        grid-template-columns:1fr;
      }
      .cta-form{justify-content:flex-start}
    }
    @media (max-width: 768px){
      .nav{
        min-height:72px;
        flex-wrap:wrap;
        padding:12px 0;
      }
      .nav-links{
        width:100%;
        order:3;
        gap:8px;
      }
      .nav-links a{
        padding:9px 12px;
      }
      .nav-cta{
        margin-left:auto;
      }
      .hero-inner{
        padding:22px;
      }
      .strip{
        grid-template-columns:1fr;
      }
      .faq-grid{
        grid-template-columns:1fr;
      }
      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }
      .update-list li{
        grid-template-columns:auto 1fr;
      }
      .update-meta{
        grid-column:2 / -1;
        text-align:left;
        padding-top:2px;
      }
    }
    @media (max-width: 520px){
      .container{width:min(calc(100% - 20px), var(--container))}
      .brand-text span{
        display:none;
      }
      h1{
        font-size:2.05rem;
      }
      .hero-copy p{
        font-size:1rem;
      }
      .cards-grid,
      .image-grid{
        grid-template-columns:1fr;
      }
      .mini-grid{
        grid-template-columns:1fr;
      }
      .feature-card,
      .info-card,
      .update-card,
      .cta-card,
      .faq-item summary,
      .faq-content,
      .content-body{
        padding-left:16px;
        padding-right:16px;
      }
      .hero-panel{
        border-radius:22px;
      }
      .hero-inner{
        padding:18px;
        gap:18px;
      }
      .hero-actions{
        gap:10px;
      }
      .btn{
        width:100%;
      }
      .nav-cta{
        width:100%;
        justify-content:center;
        margin-left:0;
      }
      .footer-links{
        justify-content:flex-start;
      }
      .copyright{
        flex-direction:column;
        align-items:flex-start;
      }
    }
    :focus-visible{
      outline:2px solid rgba(34,211,238,.75);
      outline-offset:3px;
    }

/* roulang page: article */
:root{
      --bg:#070814;
      --bg-soft:#0c1020;
      --card:#11162a;
      --card-2:#141b33;
      --line:rgba(255,255,255,.08);
      --line-strong:rgba(255,255,255,.14);
      --text:#f4f7ff;
      --muted:#a7b0c7;
      --muted-2:#7f8aa9;
      --brand:#8b5cf6;
      --brand-2:#22d3ee;
      --brand-3:#f97316;
      --success:#34d399;
      --danger:#fb7185;
      --shadow:0 18px 60px rgba(0,0,0,.35);
      --shadow-soft:0 10px 30px rgba(0,0,0,.25);
      --radius:22px;
      --radius-sm:16px;
      --radius-xs:12px;
      --container:1180px;
      --gap:24px;
      --gap-sm:16px;
      --gap-xs:10px;
      --transition:180ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Segoe UI,Roboto,Helvetica,Arial,sans-serif;
      background:
        radial-gradient(1000px 500px at 20% -10%, rgba(139,92,246,.24), transparent 55%),
        radial-gradient(900px 500px at 85% 15%, rgba(34,211,238,.16), transparent 50%),
        linear-gradient(180deg, #060711 0%, #090c18 52%, #060711 100%);
      color:var(--text);
      line-height:1.65;
      overflow-x:hidden;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(139,92,246,.35);color:#fff}
    :focus-visible{outline:2px solid rgba(34,211,238,.75);outline-offset:3px}

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

    .site-header{
      position:sticky;
      top:0;
      z-index:40;
      backdrop-filter:saturate(180%) blur(18px);
      background:rgba(7,8,20,.72);
      border-bottom:1px solid rgba(255,255,255,.06);
    }
    .nav{
      min-height:76px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      width:44px;
      height:44px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(139,92,246,.95), rgba(34,211,238,.82));
      box-shadow:0 14px 34px rgba(139,92,246,.28);
      flex:0 0 auto;
      position:relative;
      overflow:hidden;
    }
    .brand-mark::after{
      content:"18+";
      font-size:14px;
      font-weight:800;
      letter-spacing:.04em;
      color:#fff;
    }
    .brand-text{min-width:0}
    .brand-text strong{
      display:block;
      font-size:1.02rem;
      line-height:1.15;
      letter-spacing:.02em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-text span{
      display:block;
      color:var(--muted);
      font-size:.82rem;
      margin-top:3px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      justify-content:center;
    }
    .nav-links a{
      position:relative;
      color:var(--muted);
      padding:10px 14px;
      border-radius:999px;
      transition:transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition), border-color var(--transition);
      border:1px solid transparent;
    }
    .nav-links a:hover,
    .nav-links a:focus-visible{
      color:#fff;
      background:rgba(255,255,255,.05);
      border-color:rgba(255,255,255,.08);
      transform:translateY(-1px);
      outline:none;
    }
    .nav-links a.active{
      color:#fff;
      background:linear-gradient(135deg, rgba(139,92,246,.18), rgba(34,211,238,.12));
      border-color:rgba(139,92,246,.22);
      box-shadow:0 8px 24px rgba(139,92,246,.14);
    }
    .nav-cta{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:11px 16px;
      border-radius:999px;
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      color:#fff;
      border:0;
      cursor:pointer;
      box-shadow:0 16px 30px rgba(34,211,238,.16);
      transition:transform var(--transition), box-shadow var(--transition), filter var(--transition);
      flex:0 0 auto;
      font-weight:700;
    }
    .nav-cta:hover,
    .nav-cta:focus-visible{
      transform:translateY(-1px);
      box-shadow:0 20px 38px rgba(139,92,246,.22);
      outline:none;
      filter:saturate(1.08);
    }

    .page-top{
      padding:24px 0 14px;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.08);
      border-radius:28px;
      background:
        linear-gradient(180deg, rgba(6,7,17,.08), rgba(6,7,17,.78)),
        url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
      box-shadow:var(--shadow);
      min-height:420px;
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(135deg, rgba(6,7,17,.12), rgba(6,7,17,.34) 50%, rgba(6,7,17,.76)),
        radial-gradient(820px 340px at 18% 18%, rgba(139,92,246,.24), transparent 50%),
        radial-gradient(580px 320px at 82% 22%, rgba(34,211,238,.18), transparent 54%);
      pointer-events:none;
    }
    .hero-inner{
      position:relative;
      z-index:1;
      padding:38px;
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:24px;
      align-items:end;
      min-height:420px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 14px;
      border-radius:999px;
      background:rgba(7,8,20,.46);
      border:1px solid rgba(255,255,255,.12);
      color:#e6eaff;
      font-size:.92rem;
      margin-bottom:16px;
      backdrop-filter:blur(10px);
    }
    .eyebrow i{
      width:8px;height:8px;border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 5px rgba(52,211,153,.14);
      display:inline-block;
      flex:0 0 auto;
    }
    .hero-copy h1{
      margin:0;
      font-size:clamp(2rem, 4vw, 3.5rem);
      line-height:1.08;
      letter-spacing:.01em;
      text-wrap:balance;
      max-width:13ch;
    }
    .hero-copy p{
      margin:18px 0 0;
      max-width:62ch;
      color:#e9ecf8;
      font-size:1.04rem;
    }
    .hero-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 13px;
      border-radius:999px;
      background:rgba(17,22,42,.68);
      border:1px solid rgba(255,255,255,.10);
      color:#f1f5ff;
      font-size:.92rem;
      box-shadow:var(--shadow-soft);
      backdrop-filter:blur(10px);
    }
    .pill svg{width:15px;height:15px;fill:currentColor;opacity:.92}
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:24px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:48px;
      padding:0 18px;
      border-radius:999px;
      border:1px solid transparent;
      cursor:pointer;
      transition:transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
      text-decoration:none;
      font-weight:700;
      white-space:nowrap;
    }
    .btn-primary{
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      color:#fff;
      box-shadow:0 16px 30px rgba(139,92,246,.18);
    }
    .btn-primary:hover,
    .btn-primary:focus-visible{
      transform:translateY(-1px);
      box-shadow:0 22px 38px rgba(34,211,238,.16);
      outline:none;
    }
    .btn-ghost{
      background:rgba(255,255,255,.03);
      color:var(--text);
      border-color:rgba(255,255,255,.10);
    }
    .btn-ghost:hover,
    .btn-ghost:focus-visible{
      transform:translateY(-1px);
      background:rgba(255,255,255,.06);
      border-color:rgba(255,255,255,.16);
      outline:none;
    }

    .hero-aside{
      display:grid;
      gap:14px;
    }
    .mini-card{
      position:relative;
      overflow:hidden;
      min-height:178px;
      border-radius:22px;
      border:1px solid rgba(255,255,255,.10);
      background:linear-gradient(180deg, rgba(17,22,42,.76), rgba(17,22,42,.92));
      box-shadow:var(--shadow-soft);
      isolation:isolate;
    }
    .mini-card::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(6,7,17,.02), rgba(6,7,17,.6));
      z-index:1;
    }
    .mini-card img{
      position:absolute;
      inset:0;
      width:100%;
      height:100%;
      object-fit:cover;
      filter:saturate(1.02) contrast(1.05);
      transform:scale(1.01);
    }
    .mini-card .mini-copy{
      position:absolute;
      left:0;
      right:0;
      bottom:0;
      z-index:2;
      padding:18px;
    }
    .mini-card .mini-copy strong{
      display:block;
      font-size:1.02rem;
      line-height:1.3;
      margin-bottom:6px;
    }
    .mini-card .mini-copy span{
      display:block;
      color:rgba(255,255,255,.86);
      font-size:.9rem;
    }

    .section{
      padding:22px 0 0;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:18px;
      margin-bottom:16px;
    }
    .section-head h2{
      margin:0;
      font-size:1.45rem;
      letter-spacing:.01em;
    }
    .section-head p{
      margin:0;
      color:var(--muted);
      max-width:58ch;
    }

    .content-grid{
      display:grid;
      grid-template-columns:minmax(0,1.2fr) minmax(320px,.8fr);
      gap:var(--gap);
      align-items:start;
    }
    .article-card,
    .side-card,
    .info-card,
    .cta-card,
    .list-card{
      background:linear-gradient(180deg, rgba(17,22,42,.92), rgba(12,16,32,.92));
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .article-card{
      overflow:hidden;
    }
    .article-top{
      padding:24px 24px 0;
    }
    .article-chip-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-bottom:14px;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.10);
      background:rgba(255,255,255,.03);
      color:var(--muted);
      font-size:.88rem;
    }
    .chip strong{color:#fff}
    .article-title{
      margin:0;
      font-size:clamp(1.7rem, 3vw, 2.4rem);
      line-height:1.16;
      text-wrap:balance;
    }
    .article-lead{
      margin:14px 0 0;
      color:var(--muted);
      font-size:1rem;
      max-width:70ch;
    }
    .article-body{
      padding:22px 24px 24px;
    }
    .article-content{
      color:#e7ebf9;
      font-size:1.03rem;
    }
    .article-content > :first-child{margin-top:0}
    .article-content > :last-child{margin-bottom:0}
    .article-content h2,
    .article-content h3,
    .article-content h4{
      color:#fff;
      margin:1.6em 0 .8em;
      line-height:1.3;
      text-wrap:balance;
    }
    .article-content p{
      margin:0 0 1em;
      color:#dce3f7;
    }
    .article-content ul,
    .article-content ol{
      padding-left:1.2em;
      margin:0 0 1em;
      color:#dbe2f4;
    }
    .article-content li{margin:.42em 0}
    .article-content a{
      color:#8ddcff;
      text-decoration:underline;
      text-decoration-color:rgba(141,220,255,.36);
      text-underline-offset:3px;
    }
    .article-content blockquote{
      margin:1.4em 0;
      padding:18px 18px 18px 20px;
      border-left:3px solid rgba(34,211,238,.75);
      background:rgba(255,255,255,.04);
      border-radius:16px;
      color:#eef3ff;
    }
    .article-content figure{
      margin:1.25em 0;
    }
    .article-content img{
      border-radius:18px;
      border:1px solid rgba(255,255,255,.10);
      box-shadow:var(--shadow-soft);
    }
    .article-content table{
      width:100%;
      border-collapse:collapse;
      margin:1.2em 0;
      overflow:hidden;
      border-radius:16px;
      display:block;
      background:rgba(255,255,255,.03);
    }
    .article-content table thead,
    .article-content table tbody{
      display:table;
      width:100%;
    }
    .article-content th,
    .article-content td{
      border-bottom:1px solid rgba(255,255,255,.08);
      padding:12px 14px;
      text-align:left;
      color:#e7ebf7;
    }
    .article-content th{color:#fff;background:rgba(255,255,255,.03)}
    .article-content hr{
      border:0;
      border-top:1px solid rgba(255,255,255,.10);
      margin:1.6em 0;
    }

    .side-sticky{
      position:sticky;
      top:96px;
      display:grid;
      gap:var(--gap);
    }
    .side-card{
      padding:20px;
    }
    .card-title{
      margin:0 0 12px;
      font-size:1.08rem;
      line-height:1.25;
    }
    .card-text{
      margin:0;
      color:var(--muted);
      font-size:.96rem;
    }
    .info-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:10px;
    }
    .info-list li{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:12px;
      padding:12px 0;
      border-bottom:1px solid rgba(255,255,255,.08);
      color:var(--muted);
    }
    .info-list li:last-child{border-bottom:0;padding-bottom:0}
    .info-list strong{
      color:#fff;
      flex:0 0 auto;
    }
    .gallery-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:12px;
    }
    .gallery-item{
      overflow:hidden;
      border-radius:18px;
      border:1px solid rgba(255,255,255,.10);
      background:rgba(255,255,255,.03);
      min-height:148px;
      position:relative;
      isolation:isolate;
    }
    .gallery-item::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(6,7,17,.0), rgba(6,7,17,.58));
      z-index:1;
    }
    .gallery-item img{
      width:100%;
      height:100%;
      object-fit:cover;
      min-height:148px;
    }
    .gallery-item span{
      position:absolute;
      left:12px;
      right:12px;
      bottom:12px;
      z-index:2;
      font-size:.88rem;
      color:#fff;
      text-shadow:0 2px 12px rgba(0,0,0,.46);
    }

    .feature-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:var(--gap);
    }
    .feature-card{
      position:relative;
      overflow:hidden;
      padding:20px;
      border-radius:var(--radius);
      background:linear-gradient(180deg, rgba(17,22,42,.9), rgba(20,27,51,.94));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }
    .feature-card:hover{
      transform:translateY(-2px);
      border-color:var(--line-strong);
      box-shadow:0 16px 38px rgba(0,0,0,.32);
    }
    .feature-icon{
      width:46px;height:46px;
      border-radius:15px;
      display:grid;
      place-items:center;
      margin-bottom:14px;
      background:linear-gradient(135deg, rgba(139,92,246,.24), rgba(34,211,238,.18));
      border:1px solid rgba(255,255,255,.10);
      color:#fff;
      font-weight:800;
      box-shadow:0 14px 28px rgba(139,92,246,.1);
    }
    .feature-card h3{
      margin:0 0 10px;
      font-size:1.06rem;
    }
    .feature-card p{
      margin:0;
      color:var(--muted);
    }

    .faq-wrap{
      margin-top:18px;
      display:grid;
      gap:12px;
    }
    details.faq-item{
      background:linear-gradient(180deg, rgba(17,22,42,.92), rgba(12,16,32,.92));
      border:1px solid var(--line);
      border-radius:18px;
      overflow:hidden;
      box-shadow:var(--shadow-soft);
    }
    details.faq-item[open]{
      border-color:rgba(139,92,246,.24);
    }
    .faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      font-weight:700;
      color:#fff;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary span{
      flex:1;
      text-align:left;
    }
    .faq-item summary em{
      font-style:normal;
      color:var(--muted);
      font-size:1.2rem;
      transition:transform var(--transition);
      flex:0 0 auto;
    }
    details[open] summary em{transform:rotate(45deg)}
    .faq-body{
      padding:0 20px 18px;
      color:var(--muted);
    }
    .faq-body p{margin:0}

    .cta-card{
      position:relative;
      overflow:hidden;
      padding:26px;
      background:
        linear-gradient(135deg, rgba(139,92,246,.16), rgba(34,211,238,.10)),
        linear-gradient(180deg, rgba(17,22,42,.92), rgba(12,16,32,.92));
    }
    .cta-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:20px;
      align-items:center;
    }
    .cta-card h2{
      margin:0 0 10px;
      font-size:1.5rem;
      line-height:1.24;
      text-wrap:balance;
    }
    .cta-card p{
      margin:0;
      color:var(--muted);
      max-width:64ch;
    }
    .cta-form{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .cta-form .field{
      flex:1 1 240px;
      min-width:220px;
    }
    .field input{
      width:100%;
      min-height:50px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(7,8,20,.45);
      color:#fff;
      padding:0 16px;
      box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
      transition:border-color var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .field input::placeholder{color:var(--muted-2)}
    .field input:focus{
      outline:none;
      border-color:rgba(34,211,238,.42);
      box-shadow:0 0 0 4px rgba(34,211,238,.10);
      background:rgba(7,8,20,.58);
    }

    .empty-state{
      padding:30px 24px;
      text-align:center;
    }
    .empty-state h2{
      margin:0 0 10px;
      font-size:1.5rem;
    }
    .empty-state p{
      margin:0 0 18px;
      color:var(--muted);
    }

    .site-footer{
      margin-top:28px;
      padding:28px 0 30px;
      border-top:1px solid rgba(255,255,255,.06);
      background:rgba(6,7,17,.56);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.3fr .7fr;
      gap:20px;
      align-items:start;
    }
    .footer-brand p{
      margin:14px 0 0;
      color:var(--muted);
      max-width:68ch;
      font-size:.95rem;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      justify-content:flex-end;
    }
    .footer-links a{
      color:var(--muted);
      padding:9px 13px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.03);
      transition:transform var(--transition), color var(--transition), border-color var(--transition), background var(--transition);
    }
    .footer-links a:hover,
    .footer-links a:focus-visible{
      color:#fff;
      border-color:rgba(255,255,255,.14);
      background:rgba(255,255,255,.06);
      transform:translateY(-1px);
      outline:none;
    }
    .copyright{
      display:flex;
      flex-wrap:wrap;
      justify-content:space-between;
      gap:10px;
      margin-top:18px;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.08);
      color:var(--muted-2);
      font-size:.9rem;
    }
    .copyright a{color:#cfe6ff}
    .copyright a:hover{text-decoration:underline}

    @media (max-width: 1024px){
      .hero-inner{grid-template-columns:1fr; min-height:auto}
      .content-grid{grid-template-columns:1fr}
      .side-sticky{position:static}
      .feature-grid{grid-template-columns:1fr 1fr}
      .cta-grid{grid-template-columns:1fr}
      .cta-form{justify-content:flex-start}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width: 768px){
      .nav{
        min-height:auto;
        padding:14px 0;
        flex-direction:column;
        align-items:flex-start;
      }
      .nav-links{
        width:100%;
        justify-content:flex-start;
      }
      .nav-cta{
        width:100%;
        justify-content:center;
      }
      .hero-panel{border-radius:24px}
      .hero-inner{padding:24px}
      .article-top,
      .article-body,
      .side-card,
      .cta-card{padding:18px}
      .gallery-grid{grid-template-columns:1fr}
      .feature-grid{grid-template-columns:1fr}
      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }
    }
    @media (max-width: 520px){
      .container{width:min(calc(100% - 20px), var(--container))}
      .hero-copy h1{max-width:unset}
      .hero-actions{flex-direction:column}
      .btn{width:100%}
      .pill{width:100%;justify-content:flex-start}
      .hero-meta{flex-direction:column}
      .nav-links a{padding:9px 12px}
      .copyright{flex-direction:column}
    }

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