/* roulang page: index */
:root{
      --bg:#070b0e;
      --bg-soft:#0c1217;
      --panel:#111820;
      --panel-2:#151f28;
      --panel-3:#18232d;
      --line:#24313d;
      --line-soft:rgba(255,255,255,.08);
      --text:#edf4f9;
      --muted:#93a1af;
      --muted-2:#768493;
      --accent:#4ef0b2;
      --accent-2:#17d8ff;
      --accent-3:#ff9b44;
      --danger:#ff5d6b;
      --shadow:0 18px 50px rgba(0,0,0,.28);
      --shadow-soft:0 10px 28px rgba(0,0,0,.18);
      --radius:16px;
      --radius-sm:12px;
      --radius-lg:22px;
      --container:1180px;
      --gap:24px;
      --ease:cubic-bezier(.2,.8,.2,1);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(23,216,255,.16), transparent 32%),
        radial-gradient(circle at 80% 8%, rgba(78,240,178,.12), transparent 28%),
        linear-gradient(180deg,#05080b 0%, #091018 42%, #071015 100%);
      line-height:1.7;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    ::selection{background:rgba(78,240,178,.28);color:#fff}
    :focus-visible{outline:2px solid var(--accent);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter:blur(16px);
      background:rgba(5,8,11,.78);
      border-bottom:1px solid rgba(255,255,255,.06);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:12px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,rgba(78,240,178,.18),rgba(23,216,255,.14));
      border:1px solid rgba(78,240,178,.24);
      color:var(--accent);
      box-shadow:0 0 0 1px rgba(255,255,255,.04) inset;
      flex:0 0 auto;
      font-weight:800;
      letter-spacing:.08em;
    }
    .brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
    .brand-text strong{
      font-size:1rem;
      line-height:1.15;
      letter-spacing:.02em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-text small{
      color:var(--muted);
      font-size:.82rem;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .main-nav{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .main-nav a{
      position:relative;
      padding:10px 14px;
      border-radius:999px;
      color:var(--muted);
      border:1px solid transparent;
      transition:transform .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease);
      white-space:nowrap;
      font-size:.95rem;
    }
    .main-nav a:hover{
      color:var(--text);
      background:rgba(255,255,255,.04);
      border-color:rgba(255,255,255,.08);
      transform:translateY(-1px);
    }
    .main-nav a.active{
      color:#06110d;
      background:linear-gradient(135deg,var(--accent),#8ff6d0);
      border-color:transparent;
      box-shadow:0 10px 24px rgba(78,240,178,.22);
      font-weight:700;
    }
    .hero{
      position:relative;
      overflow:hidden;
      padding:34px 0 26px;
    }
    .hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg,rgba(5,8,11,.74) 0%,rgba(5,8,11,.62) 42%,rgba(5,8,11,.84) 100%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      transform:scale(1.01);
      z-index:-2;
    }
    .hero::after{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 18% 24%, rgba(78,240,178,.28), transparent 20%),
        radial-gradient(circle at 74% 18%, rgba(23,216,255,.18), transparent 18%),
        linear-gradient(180deg, rgba(8,13,18,.12), rgba(8,13,18,.58));
      z-index:-1;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);
      gap:28px;
      align-items:stretch;
      min-height:660px;
      padding:28px 0 18px;
    }
    .hero-copy{
      display:flex;
      flex-direction:column;
      justify-content:center;
      gap:22px;
      padding:28px 0 20px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      width:max-content;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.06);
      color:#d8e4ec;
      border:1px solid rgba(255,255,255,.08);
      font-size:.88rem;
      letter-spacing:.02em;
    }
    .eyebrow::before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 6px rgba(78,240,178,.12);
    }
    h1{
      margin:0;
      font-size:clamp(2.4rem,4vw,4.6rem);
      line-height:1.06;
      letter-spacing:-.03em;
      max-width:11ch;
    }
    .hero-copy p{
      margin:0;
      color:#d9e3ea;
      font-size:1.04rem;
      max-width:60ch;
    }
    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.04);
      color:#d7e4ec;
      font-size:.9rem;
      transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
    }
    .tag:hover{transform:translateY(-1px);border-color:rgba(78,240,178,.26);background:rgba(78,240,178,.08)}
    .tag-dot{
      width:8px;height:8px;border-radius:50%;
      background:var(--accent-2);
      box-shadow:0 0 0 5px rgba(23,216,255,.12);
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:4px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:46px;
      padding:0 18px;
      border-radius:12px;
      border:1px solid transparent;
      cursor:pointer;
      transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
      font-weight:700;
      letter-spacing:.01em;
      user-select:none;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn.primary{
      background:linear-gradient(135deg,var(--accent),#88f4cf);
      color:#06110d;
      box-shadow:0 14px 28px rgba(78,240,178,.2);
    }
    .btn.primary:hover{box-shadow:0 16px 32px rgba(78,240,178,.28)}
    .btn.secondary{
      background:rgba(255,255,255,.03);
      color:var(--text);
      border-color:rgba(255,255,255,.11);
    }
    .btn.secondary:hover{
      border-color:rgba(23,216,255,.28);
      background:rgba(23,216,255,.08);
      box-shadow:0 12px 24px rgba(0,0,0,.18);
    }
    .hero-panel{
      display:grid;
      grid-template-rows:auto 1fr;
      gap:16px;
      align-self:stretch;
    }
    .hero-visual{
      position:relative;
      border-radius:var(--radius-lg);
      overflow:hidden;
      border:1px solid rgba(255,255,255,.09);
      background:var(--panel);
      box-shadow:var(--shadow);
      min-height:340px;
    }
    .hero-visual img{
      width:100%;
      height:100%;
      object-fit:cover;
      aspect-ratio:16/10;
      filter:saturate(1.06) contrast(1.04);
    }
    .hero-visual::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,rgba(8,12,16,.02),rgba(8,12,16,.78));
    }
    .hero-visual-copy{
      position:absolute;
      left:18px;
      right:18px;
      bottom:18px;
      z-index:1;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .hero-visual-copy strong{
      font-size:1.18rem;
      line-height:1.35;
      max-width:18ch;
    }
    .hero-visual-copy span{
      display:inline-flex;
      width:max-content;
      padding:6px 10px;
      border-radius:999px;
      background:rgba(6,17,13,.72);
      border:1px solid rgba(78,240,178,.22);
      color:#baf6dc;
      font-size:.82rem;
    }
    .mini-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
    }
    .mini-card{
      padding:16px 16px 15px;
      border-radius:var(--radius);
      border:1px solid rgba(255,255,255,.08);
      background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.03));
      box-shadow:var(--shadow-soft);
      transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
    }
    .mini-card:hover{
      transform:translateY(-2px);
      border-color:rgba(78,240,178,.22);
      background:linear-gradient(180deg,rgba(78,240,178,.07),rgba(255,255,255,.03));
    }
    .mini-card .label{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      color:var(--muted);
      font-size:.86rem;
      margin-bottom:10px;
    }
    .mini-card .value{
      display:block;
      font-size:1.42rem;
      font-weight:800;
      line-height:1.1;
      letter-spacing:-.02em;
      margin-bottom:8px;
    }
    .meter{
      height:7px;
      border-radius:999px;
      background:rgba(255,255,255,.07);
      overflow:hidden;
    }
    .meter i{
      display:block;
      height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg,var(--accent-2),var(--accent));
      box-shadow:0 0 16px rgba(23,216,255,.22);
    }
    .mini-card p{
      margin:10px 0 0;
      color:var(--muted);
      font-size:.88rem;
      line-height:1.55;
    }
    .section{
      padding:24px 0 12px;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:18px;
      margin-bottom:18px;
    }
    .section-head h2{
      margin:0;
      font-size:clamp(1.45rem,2.4vw,2.2rem);
      line-height:1.18;
      letter-spacing:-.02em;
    }
    .section-head p{
      margin:0;
      color:var(--muted);
      max-width:58ch;
      font-size:.98rem;
    }
    .stats-band{
      margin-top:-10px;
      padding:0 0 16px;
    }
    .stats-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
    }
    .stat-card{
      position:relative;
      padding:18px 18px 17px;
      border-radius:var(--radius);
      border:1px solid rgba(255,255,255,.09);
      background:
        linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.03)),
        linear-gradient(135deg,rgba(23,216,255,.04),rgba(78,240,178,.02));
      box-shadow:var(--shadow-soft);
      overflow:hidden;
      transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
    }
    .stat-card:hover{
      transform:translateY(-2px);
      border-color:rgba(78,240,178,.22);
      box-shadow:0 16px 34px rgba(0,0,0,.24);
    }
    .stat-card .kicker{
      color:var(--muted);
      font-size:.86rem;
      display:flex;
      align-items:center;
      gap:8px;
      margin-bottom:12px;
    }
    .stat-card .kicker::before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 5px rgba(78,240,178,.12);
    }
    .stat-card strong{
      display:block;
      font-size:1.9rem;
      line-height:1;
      letter-spacing:-.03em;
      margin-bottom:8px;
    }
    .stat-card span{
      color:#d5e0e8;
      font-size:.92rem;
      line-height:1.5;
    }
    .matrix{
      display:grid;
      grid-template-columns:1.18fr .82fr;
      gap:24px;
      align-items:stretch;
    }
    .feature-card{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:0;
      overflow:hidden;
      border-radius:var(--radius-lg);
      border:1px solid rgba(255,255,255,.09);
      background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
      box-shadow:var(--shadow);
      min-height:340px;
    }
    .feature-media{
      position:relative;
      min-height:100%;
    }
    .feature-media img{
      width:100%;
      height:100%;
      object-fit:cover;
      aspect-ratio:1/1;
    }
    .feature-media::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,rgba(8,12,16,.06),rgba(8,12,16,.52));
    }
    .feature-copy{
      padding:24px;
      display:flex;
      flex-direction:column;
      justify-content:center;
      gap:14px;
      background:
        linear-gradient(180deg,rgba(14,19,25,.98),rgba(14,19,25,.92));
    }
    .topic-badges{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:999px;
      font-size:.82rem;
      letter-spacing:.01em;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.04);
      color:#dce7ee;
    }
    .badge.hot{
      background:rgba(255,93,107,.1);
      border-color:rgba(255,93,107,.22);
      color:#ffb9c0;
    }
    .badge.live{
      background:rgba(78,240,178,.1);
      border-color:rgba(78,240,178,.22);
      color:#b9f6dd;
    }
    .badge.info{
      background:rgba(23,216,255,.1);
      border-color:rgba(23,216,255,.22);
      color:#b6efff;
    }
    .feature-copy h3{
      margin:0;
      font-size:1.55rem;
      line-height:1.28;
      letter-spacing:-.02em;
    }
    .feature-copy p{
      margin:0;
      color:var(--muted);
      line-height:1.75;
    }
    .feature-meta{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      color:#c9d6de;
      font-size:.9rem;
    }
    .feature-meta span{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 10px;
      border-radius:12px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(255,255,255,.08);
    }
    .feature-meta i{
      width:8px;height:8px;border-radius:50%;
      background:var(--accent-2);
      box-shadow:0 0 0 5px rgba(23,216,255,.1);
    }
    .feature-actions{margin-top:4px}
    .stack-cards{
      display:grid;
      gap:16px;
    }
    .stack-card{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius);
      border:1px solid rgba(255,255,255,.08);
      background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.03));
      box-shadow:var(--shadow-soft);
      min-height:100px;
      display:grid;
      grid-template-columns:116px 1fr;
      gap:0;
      transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
    }
    .stack-card:hover{
      transform:translateY(-2px);
      border-color:rgba(78,240,178,.18);
      box-shadow:0 16px 32px rgba(0,0,0,.24);
    }
    .stack-card img{
      width:100%;
      height:100%;
      object-fit:cover;
      aspect-ratio:1/1;
    }
    .stack-content{
      padding:16px 16px 16px 18px;
      display:flex;
      flex-direction:column;
      justify-content:center;
      gap:8px;
    }
    .stack-content h3{
      margin:0;
      font-size:1.02rem;
      line-height:1.35;
    }
    .stack-content p{
      margin:0;
      color:var(--muted);
      font-size:.9rem;
      line-height:1.6;
    }
    .stack-meta{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      color:var(--muted-2);
      font-size:.82rem;
    }
    .stack-meta span{
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .content-split{
      display:grid;
      grid-template-columns:1.18fr .82fr;
      gap:24px;
      align-items:start;
      padding-top:18px;
    }
    .panel{
      border-radius:var(--radius-lg);
      border:1px solid rgba(255,255,255,.09);
      background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.03));
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    .list-panel{
      padding:18px;
    }
    .list-panel .panel-head{
      display:flex;
      justify-content:space-between;
      align-items:end;
      gap:16px;
      margin-bottom:16px;
    }
    .panel-head h3{
      margin:0;
      font-size:1.2rem;
      line-height:1.3;
    }
    .panel-head span{
      color:var(--muted);
      font-size:.9rem;
    }
    .updates{
      display:grid;
      gap:12px;
    }
    .update-item{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:14px;
      align-items:start;
      padding:15px 14px;
      border-radius:14px;
      background:rgba(255,255,255,.03);
      border:1px solid rgba(255,255,255,.07);
      transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
    }
    .update-item:hover{
      transform:translateX(2px);
      border-color:rgba(23,216,255,.2);
      background:rgba(23,216,255,.05);
    }
    .update-index{
      width:34px;height:34px;border-radius:10px;
      display:grid;place-items:center;
      background:rgba(78,240,178,.1);
      color:#baf6dc;
      border:1px solid rgba(78,240,178,.18);
      font-weight:800;
      flex:0 0 auto;
    }
    .update-item h4{
      margin:0 0 6px;
      font-size:1rem;
      line-height:1.4;
    }
    .update-item p{
      margin:0;
      color:var(--muted);
      font-size:.9rem;
      line-height:1.6;
    }
    .update-side{
      padding:18px;
      display:grid;
      gap:16px;
    }
    .side-visual{
      position:relative;
      border-radius:18px;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.09);
      min-height:240px;
    }
    .side-visual img{
      width:100%;
      height:100%;
      object-fit:cover;
      aspect-ratio:4/3;
    }
    .side-visual::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,rgba(8,12,16,.08),rgba(8,12,16,.74));
    }
    .side-visual-copy{
      position:absolute;
      inset:auto 18px 18px 18px;
      z-index:1;
      display:flex;
      flex-direction:column;
      gap:8px;
    }
    .side-visual-copy strong{
      font-size:1.15rem;
      line-height:1.35;
    }
    .side-visual-copy span{
      color:#d7e4ec;
      font-size:.9rem;
    }
    .side-list{
      display:grid;
      gap:10px;
    }
    .side-list li{
      list-style:none;
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:10px 0;
      border-bottom:1px dashed rgba(255,255,255,.09);
      color:#dce7ee;
      font-size:.94rem;
    }
    .side-list li:last-child{border-bottom:0;padding-bottom:0}
    .side-list i{
      width:8px;height:8px;margin-top:8px;border-radius:50%;
      background:var(--accent-3);
      box-shadow:0 0 0 5px rgba(255,155,68,.1);
      flex:0 0 auto;
    }
    .chips-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:6px;
    }
    .chips-row a{
      padding:9px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      color:#dce6ed;
      border:1px solid rgba(255,255,255,.08);
      font-size:.9rem;
      transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
    }
    .chips-row a:hover{
      transform:translateY(-1px);
      border-color:rgba(78,240,178,.2);
      background:rgba(78,240,178,.08);
    }
    .trust-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:16px;
    }
    .trust-card{
      padding:18px;
      border-radius:var(--radius);
      border:1px solid rgba(255,255,255,.09);
      background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.03));
      box-shadow:var(--shadow-soft);
    }
    .trust-card .icon{
      width:42px;height:42px;border-radius:14px;
      display:grid;place-items:center;
      margin-bottom:14px;
      background:rgba(78,240,178,.1);
      border:1px solid rgba(78,240,178,.16);
      color:#baf6dc;
      font-weight:900;
    }
    .trust-card h3{
      margin:0 0 8px;
      font-size:1.05rem;
    }
    .trust-card p{
      margin:0;
      color:var(--muted);
      line-height:1.7;
      font-size:.94rem;
    }
    .faq-wrap{
      display:grid;
      grid-template-columns:1fr;
      gap:12px;
    }
    details.faq{
      border-radius:16px;
      border:1px solid rgba(255,255,255,.09);
      background:rgba(255,255,255,.04);
      box-shadow:var(--shadow-soft);
      overflow:hidden;
      transition:border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
    }
    details.faq[open]{border-color:rgba(78,240,178,.22);background:rgba(78,240,178,.05)}
    details.faq:hover{transform:translateY(-1px)}
    details.faq summary{
      list-style:none;
      cursor:pointer;
      padding:16px 18px;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:16px;
      font-weight:700;
      line-height:1.5;
    }
    details.faq summary::-webkit-details-marker{display:none}
    details.faq summary::after{
      content:"+";
      width:28px;height:28px;
      border-radius:50%;
      display:grid;place-items:center;
      background:rgba(255,255,255,.06);
      color:var(--text);
      flex:0 0 auto;
      transition:transform .22s var(--ease),background .22s var(--ease);
    }
    details.faq[open] summary::after{
      content:"−";
      background:rgba(78,240,178,.12);
      color:#baf6dc;
    }
    .faq-content{
      padding:0 18px 16px;
      color:var(--muted);
      line-height:1.75;
      font-size:.95rem;
    }
    .cta{
      position:relative;
      overflow:hidden;
      padding:26px 0 42px;
    }
    .cta-box{
      position:relative;
      border-radius:24px;
      border:1px solid rgba(255,255,255,.09);
      overflow:hidden;
      background:
        linear-gradient(90deg,rgba(6,10,13,.84),rgba(6,10,13,.62)),
        url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
      box-shadow:var(--shadow);
    }
    .cta-inner{
      display:grid;
      grid-template-columns:1fr auto;
      gap:20px;
      align-items:center;
      padding:30px;
    }
    .cta-copy{
      max-width:64ch;
    }
    .cta-copy h2{
      margin:0 0 10px;
      font-size:clamp(1.5rem,2.8vw,2.35rem);
      line-height:1.16;
      letter-spacing:-.02em;
    }
    .cta-copy p{
      margin:0;
      color:#d7e4ec;
      line-height:1.75;
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      justify-content:flex-end;
    }
    .footer{
      padding:26px 0 18px;
      border-top:1px solid rgba(255,255,255,.08);
      background:rgba(5,8,11,.58);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .9fr .9fr 1fr;
      gap:18px;
      padding:8px 0 18px;
    }
    .footer-brand{
      display:flex;
      flex-direction:column;
      gap:14px;
    }
    .footer-brand strong{
      font-size:1.05rem;
      letter-spacing:.02em;
    }
    .footer-brand p{
      margin:0;
      color:var(--muted);
      line-height:1.8;
      font-size:.94rem;
      max-width:34ch;
    }
    .footer-col h3{
      margin:0 0 12px;
      font-size:.98rem;
      color:#f5fbff;
    }
    .footer-links{
      display:grid;
      gap:10px;
    }
    .footer-links a{
      color:var(--muted);
      transition:color .2s var(--ease),transform .2s var(--ease);
    }
    .footer-links a:hover{
      color:#fff;
      transform:translateX(2px);
    }
    .footer-note{
      padding-top:14px;
      border-top:1px solid rgba(255,255,255,.08);
      display:flex;
      flex-wrap:wrap;
      gap:10px 18px;
      justify-content:space-between;
      color:var(--muted-2);
      font-size:.88rem;
    }
    .footer-note span{
      display:inline-flex;
      align-items:center;
      gap:8px;
    }
    .footer-note em{
      font-style:normal;
      color:#dce7ee;
    }
    .risk-line{
      color:#d7e4ec;
    }
    @media (max-width: 1200px){
      .hero-grid{grid-template-columns:1fr;min-height:auto}
      .hero-copy{padding-top:4px}
      .matrix,.content-split,.footer-grid{grid-template-columns:1fr}
      .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .feature-card{grid-template-columns:1fr}
      .feature-media img{aspect-ratio:16/9}
    }
    @media (max-width: 768px){
      .header-inner{flex-direction:column;align-items:flex-start}
      .main-nav{width:100%;justify-content:flex-start;overflow-x:auto;padding-bottom:2px}
      .hero{padding-top:18px}
      .hero-grid{gap:20px;padding-top:14px}
      h1{max-width:none}
      .mini-grid,.trust-grid{grid-template-columns:1fr}
      .cta-inner{grid-template-columns:1fr}
      .cta-actions{justify-content:flex-start}
      .section-head{flex-direction:column;align-items:flex-start}
      .update-item{grid-template-columns:auto 1fr}
      .update-item time{grid-column:2/3}
    }
    @media (max-width: 520px){
      .container{width:min(var(--container),calc(100% - 22px))}
      .header-inner{min-height:auto;padding:10px 0 12px}
      .brand-mark{width:38px;height:38px;border-radius:12px}
      .brand-text small{white-space:normal}
      .hero-copy{gap:16px}
      h1{font-size:clamp(2rem,10vw,2.9rem)}
      .hero-copy p{font-size:.98rem}
      .stats-grid{grid-template-columns:1fr}
      .feature-copy,.list-panel,.update-side,.cta-inner{padding:18px}
      .stack-card{grid-template-columns:92px 1fr}
      .stack-content{padding:14px}
      .btn{width:100%}
      .hero-actions,.cta-actions{width:100%}
      .hero-actions .btn,.cta-actions .btn{flex:1 1 100%}
      details.faq summary{padding:14px 14px}
      .faq-content{padding:0 14px 14px}
    }

/* roulang page: category1 */
:root{
      --bg:#090d0f;
      --bg-2:#101619;
      --panel:#141c20;
      --panel-2:#182226;
      --text:#edf7f3;
      --muted:#9fb0ad;
      --soft:#c8d8d4;
      --line:rgba(199,255,229,.14);
      --line-strong:rgba(51,255,178,.32);
      --accent:#29f29a;
      --accent-2:#21d4ff;
      --warn:#ff9d3d;
      --danger:#ff5b63;
      --shadow:0 18px 48px rgba(0,0,0,.34);
      --shadow-soft:0 12px 28px rgba(0,0,0,.24);
      --radius:18px;
      --radius-md:14px;
      --radius-sm:10px;
      --container:1180px;
      --ease:all .22s ease;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      min-height:100vh;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(33,212,255,.14), transparent 34%),
        radial-gradient(circle at 85% 16%, rgba(41,242,154,.12), transparent 30%),
        linear-gradient(180deg,#070a0c 0%,#0a0f12 48%,#081014 100%);
      line-height:1.65;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    button,input,select{font:inherit}
    button{cursor:pointer;border:0}
    ::selection{background:rgba(41,242,154,.32);color:#fff}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(9,13,15,.82);
      backdrop-filter:blur(16px);
      border-bottom:1px solid var(--line);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:13px;
      min-width:0;
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:13px;
      display:grid;
      place-items:center;
      color:#06100c;
      font-weight:900;
      font-size:24px;
      background:linear-gradient(135deg,var(--accent),var(--accent-2));
      box-shadow:0 0 0 1px rgba(255,255,255,.1),0 8px 24px rgba(41,242,154,.2);
      flex:0 0 auto;
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
    .brand-text strong{font-size:18px;letter-spacing:.2px;white-space:nowrap}
    .brand-text small{margin-top:5px;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:360px}
    .main-nav{
      display:flex;
      align-items:center;
      gap:8px;
      padding:6px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.035);
      border-radius:999px;
    }
    .main-nav a{
      color:var(--soft);
      padding:10px 16px;
      border-radius:999px;
      font-size:14px;
      transition:var(--ease);
      white-space:nowrap;
    }
    .main-nav a:hover{
      color:#fff;
      background:rgba(41,242,154,.1);
    }
    .main-nav a.active{
      color:#06100c;
      background:var(--accent);
      font-weight:700;
      box-shadow:0 8px 24px rgba(41,242,154,.18);
    }
    .page-hero{
      position:relative;
      padding:56px 0 44px;
      overflow:hidden;
      border-bottom:1px solid var(--line);
    }
    .page-hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg,rgba(7,10,12,.9),rgba(7,10,12,.74),rgba(7,10,12,.94)),
        url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
      opacity:.9;
    }
    .page-hero::after{
      content:"";
      position:absolute;
      inset:auto -8% -48px -8%;
      height:110px;
      background:linear-gradient(180deg,transparent,rgba(9,13,15,.98));
      pointer-events:none;
    }
    .hero-content{
      position:relative;
      z-index:1;
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:34px;
      align-items:end;
    }
    .crumbs{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      color:var(--muted);
      font-size:13px;
      margin-bottom:18px;
    }
    .crumbs a{transition:var(--ease)}
    .crumbs a:hover{color:var(--accent)}
    .crumbs span:last-child{color:var(--soft)}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 11px;
      border:1px solid var(--line-strong);
      border-radius:999px;
      color:var(--accent);
      background:rgba(41,242,154,.08);
      font-size:13px;
      font-weight:700;
      margin-bottom:18px;
    }
    .pulse{
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 6px rgba(41,242,154,.12);
    }
    h1{
      font-size:clamp(34px,5vw,62px);
      line-height:1.06;
      letter-spacing:-1.4px;
      max-width:850px;
      margin-bottom:18px;
    }
    .hero-lead{
      max-width:760px;
      color:var(--soft);
      font-size:17px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:13px;
      margin-top:28px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:0 18px;
      border-radius:13px;
      transition:var(--ease);
      font-weight:800;
      font-size:14px;
      outline:none;
    }
    .btn:focus-visible,.filter-control input:focus-visible,.filter-control select:focus-visible,.faq-question:focus-visible{
      outline:3px solid rgba(33,212,255,.36);
      outline-offset:3px;
    }
    .btn-primary{
      color:#06100c;
      background:linear-gradient(135deg,var(--accent),#7dffc4);
      box-shadow:0 12px 34px rgba(41,242,154,.18);
    }
    .btn-primary:hover{transform:translateY(-2px);filter:brightness(1.04);box-shadow:0 16px 42px rgba(41,242,154,.25)}
    .btn-secondary{
      color:var(--text);
      border:1px solid var(--line-strong);
      background:rgba(255,255,255,.04);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(33,212,255,.55);background:rgba(33,212,255,.08)}
    .hero-panel{
      border:1px solid var(--line);
      background:rgba(20,28,32,.78);
      border-radius:var(--radius);
      padding:18px;
      box-shadow:var(--shadow);
      backdrop-filter:blur(10px);
    }
    .hero-panel-title{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:12px;
      padding-bottom:14px;
      border-bottom:1px solid var(--line);
      margin-bottom:14px;
    }
    .hero-panel-title strong{font-size:16px}
    .status-dot{
      color:var(--warn);
      font-size:12px;
      padding:4px 9px;
      border-radius:999px;
      background:rgba(255,157,61,.1);
      border:1px solid rgba(255,157,61,.2);
      white-space:nowrap;
    }
    .quick-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:10px;
    }
    .quick-item{
      padding:15px;
      border:1px solid var(--line);
      border-radius:14px;
      background:rgba(255,255,255,.035);
    }
    .quick-item b{
      display:block;
      font-size:23px;
      line-height:1;
      margin-bottom:7px;
      color:#fff;
    }
    .quick-item span{font-size:12px;color:var(--muted)}
    main{position:relative;z-index:1}
    .section{padding:72px 0}
    .section-tight{padding:52px 0}
    .section-head{
      display:flex;
      justify-content:space-between;
      gap:26px;
      align-items:end;
      margin-bottom:26px;
    }
    .section-title{max-width:760px}
    .section-title h2{
      font-size:clamp(25px,3vw,38px);
      line-height:1.18;
      letter-spacing:-.5px;
      margin-bottom:10px;
    }
    .section-title p{color:var(--muted);font-size:15px}
    .badge-row{
      display:flex;
      flex-wrap:wrap;
      gap:9px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:var(--soft);
      border:1px solid var(--line);
      background:rgba(255,255,255,.035);
      border-radius:999px;
      padding:7px 10px;
      font-size:12px;
      white-space:nowrap;
    }
    .badge.hot{color:var(--warn);border-color:rgba(255,157,61,.28);background:rgba(255,157,61,.09)}
    .badge.good{color:var(--accent);border-color:rgba(41,242,154,.26);background:rgba(41,242,154,.08)}
    .filter-panel{
      display:grid;
      grid-template-columns:1.4fr repeat(3,.7fr);
      gap:12px;
      padding:16px;
      border:1px solid var(--line);
      background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.026));
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
      margin-bottom:26px;
    }
    .filter-control label{
      display:block;
      color:var(--muted);
      font-size:12px;
      margin-bottom:7px;
    }
    .filter-control input,.filter-control select{
      width:100%;
      height:44px;
      color:var(--text);
      border:1px solid var(--line);
      border-radius:12px;
      background:#0d1417;
      padding:0 12px;
      outline:none;
      transition:var(--ease);
    }
    .filter-control input:hover,.filter-control select:hover{border-color:rgba(41,242,154,.28)}
    .topic-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 330px;
      gap:24px;
      align-items:start;
    }
    .feature-card{
      display:grid;
      grid-template-columns:280px minmax(0,1fr);
      gap:20px;
      padding:16px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:rgba(20,28,32,.78);
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
      margin-bottom:16px;
      overflow:hidden;
    }
    .feature-card:hover{
      transform:translateY(-3px);
      border-color:rgba(41,242,154,.32);
      box-shadow:0 18px 42px rgba(0,0,0,.32);
    }
    .feature-media{
      position:relative;
      min-height:180px;
      border-radius:14px;
      overflow:hidden;
      background:#10181b;
    }
    .feature-media img{
      width:100%;
      height:100%;
      object-fit:cover;
      position:absolute;
      inset:0;
      transition:transform .32s ease;
    }
    .feature-card:hover .feature-media img{transform:scale(1.04)}
    .feature-media .corner{
      position:absolute;
      left:12px;
      top:12px;
      z-index:2;
      color:#06100c;
      background:var(--accent);
      border-radius:999px;
      padding:5px 9px;
      font-size:12px;
      font-weight:800;
    }
    .feature-body{display:flex;flex-direction:column;min-width:0}
    .feature-body h3{
      font-size:22px;
      line-height:1.28;
      margin:9px 0 10px;
    }
    .feature-body p{
      color:var(--muted);
      font-size:14px;
      display:-webkit-box;
      -webkit-line-clamp:3;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:auto;
      padding-top:18px;
      color:var(--muted);
      font-size:12px;
    }
    .meta span{
      padding:5px 8px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      border:1px solid var(--line);
    }
    .side-panel{
      position:sticky;
      top:96px;
      display:grid;
      gap:14px;
    }
    .side-card{
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:rgba(20,28,32,.78);
      padding:18px;
      box-shadow:var(--shadow-soft);
    }
    .side-card h3{
      font-size:17px;
      margin-bottom:12px;
    }
    .side-list{
      list-style:none;
      display:grid;
      gap:10px;
    }
    .side-list li{
      color:var(--soft);
      padding:11px 0;
      border-bottom:1px solid var(--line);
      font-size:14px;
    }
    .side-list li:last-child{border-bottom:0}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
    .tag-cloud a{
      color:var(--soft);
      font-size:12px;
      padding:7px 9px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      border:1px solid var(--line);
      transition:var(--ease);
    }
    .tag-cloud a:hover{color:var(--accent);border-color:rgba(41,242,154,.32);transform:translateY(-1px)}
    .timeline{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .step{
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:linear-gradient(180deg,rgba(24,34,38,.9),rgba(15,22,25,.9));
      padding:20px;
      min-height:180px;
      transition:var(--ease);
    }
    .step:hover{border-color:rgba(33,212,255,.32);transform:translateY(-3px)}
    .step-num{
      width:34px;
      height:34px;
      display:grid;
      place-items:center;
      border-radius:11px;
      color:#06100c;
      background:var(--accent-2);
      font-weight:900;
      margin-bottom:15px;
    }
    .step h3{font-size:18px;margin-bottom:8px}
    .step p{color:var(--muted);font-size:14px}
    .trust-box{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:18px;
      border:1px solid rgba(255,157,61,.2);
      background:linear-gradient(135deg,rgba(255,157,61,.08),rgba(41,242,154,.04));
      border-radius:var(--radius);
      padding:22px;
    }
    .trust-item{
      display:flex;
      gap:13px;
      align-items:flex-start;
    }
    .trust-icon{
      width:34px;
      height:34px;
      border-radius:11px;
      display:grid;
      place-items:center;
      color:var(--warn);
      background:rgba(255,157,61,.12);
      border:1px solid rgba(255,157,61,.22);
      flex:0 0 auto;
    }
    .trust-item h3{font-size:17px;margin-bottom:5px}
    .trust-item p{color:var(--muted);font-size:14px}
    .faq-wrap{
      display:grid;
      grid-template-columns:.8fr 1.2fr;
      gap:24px;
      align-items:start;
    }
    .faq-intro{
      border:1px solid var(--line);
      border-radius:var(--radius);
      padding:24px;
      background:rgba(20,28,32,.68);
    }
    .faq-intro h2{
      font-size:30px;
      line-height:1.2;
      margin-bottom:12px;
    }
    .faq-intro p{color:var(--muted)}
    .faq-list{display:grid;gap:12px}
    .faq-item{
      border:1px solid var(--line);
      border-radius:var(--radius-md);
      background:rgba(20,28,32,.76);
      overflow:hidden;
    }
    .faq-question{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:18px 20px;
      color:var(--text);
      background:transparent;
      text-align:left;
      font-weight:800;
    }
    .faq-question span:last-child{
      color:var(--accent);
      font-size:20px;
      line-height:1;
      transition:var(--ease);
    }
    .faq-answer{
      display:none;
      padding:0 20px 18px;
      color:var(--muted);
      font-size:14px;
    }
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
    .pagination{
      display:flex;
      justify-content:center;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      margin-top:26px;
    }
    .page-btn{
      min-width:42px;
      height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 13px;
      color:var(--soft);
      border:1px solid var(--line);
      border-radius:12px;
      background:rgba(255,255,255,.035);
      transition:var(--ease);
      font-size:14px;
    }
    .page-btn:hover{color:#fff;border-color:rgba(41,242,154,.32);transform:translateY(-1px)}
    .page-btn.current{color:#06100c;background:var(--accent);border-color:var(--accent);font-weight:900}
    .cta{
      padding:64px 0 78px;
    }
    .cta-card{
      position:relative;
      overflow:hidden;
      border:1px solid var(--line-strong);
      border-radius:26px;
      padding:34px;
      background:
        linear-gradient(90deg,rgba(7,10,12,.9),rgba(7,10,12,.72)),
        url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
      box-shadow:var(--shadow);
    }
    .cta-card h2{
      font-size:clamp(26px,3.5vw,42px);
      line-height:1.15;
      margin-bottom:12px;
      max-width:760px;
    }
    .cta-card p{color:var(--soft);max-width:800px;margin-bottom:24px}
    .footer{
      border-top:1px solid var(--line);
      background:#070b0d;
      padding:48px 0 24px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.35fr .65fr .65fr .65fr;
      gap:28px;
      margin-bottom:30px;
    }
    .footer-brand strong{font-size:20px}
    .footer-brand p{
      margin-top:12px;
      color:var(--muted);
      font-size:14px;
      max-width:460px;
    }
    .footer-col h3{
      font-size:15px;
      margin-bottom:12px;
      color:#fff;
    }
    .footer-links{
      display:grid;
      gap:9px;
    }
    .footer-links a{
      color:var(--muted);
      font-size:14px;
      transition:var(--ease);
    }
    .footer-links a:hover{color:var(--accent);transform:translateX(2px)}
    .footer-note{
      display:flex;
      flex-wrap:wrap;
      gap:12px 18px;
      align-items:center;
      padding-top:18px;
      border-top:1px solid var(--line);
      color:var(--muted);
      font-size:13px;
    }
    .footer-note em{font-style:normal;color:var(--soft)}
    .risk-line{color:#d5b18b}
    @media (max-width:1024px){
      .hero-content,.topic-layout,.faq-wrap{grid-template-columns:1fr}
      .side-panel{position:static;grid-template-columns:repeat(2,1fr)}
      .filter-panel{grid-template-columns:1fr 1fr}
      .timeline{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      .container{width:min(100% - 28px,var(--container))}
      .header-inner{min-height:auto;padding:14px 0;align-items:flex-start;flex-direction:column}
      .brand-text small{max-width:260px}
      .main-nav{width:100%;overflow-x:auto;justify-content:flex-start;border-radius:16px}
      .main-nav a{padding:9px 13px}
      .page-hero{padding:36px 0 32px}
      .hero-content{gap:22px}
      .quick-grid{grid-template-columns:1fr 1fr}
      .section{padding:54px 0}
      .section-head{align-items:flex-start;flex-direction:column}
      .feature-card{grid-template-columns:1fr}
      .feature-media{min-height:210px}
      .side-panel{grid-template-columns:1fr}
      .trust-box{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      h1{font-size:32px;letter-spacing:-.7px}
      .hero-lead{font-size:15px}
      .hero-actions .btn{width:100%}
      .filter-panel{grid-template-columns:1fr}
      .quick-grid,.timeline{grid-template-columns:1fr}
      .feature-media{min-height:180px}
      .cta-card{padding:24px}
      .footer-note{display:grid}
    }