/* roulang page: index */
:root{
      --bg:#0b0f17;
      --bg-2:#101722;
      --panel:#151d29;
      --panel-2:#1b2533;
      --card:#121a25;
      --text:#f4f7fb;
      --muted:#a7b2c4;
      --muted-2:#748196;
      --line:rgba(180,205,235,.14);
      --primary:#3ee8d0;
      --primary-2:#7c5cff;
      --accent:#ffb347;
      --danger:#ff5d73;
      --success:#7df39a;
      --shadow:0 18px 50px rgba(0,0,0,.35);
      --shadow-soft:0 10px 28px rgba(0,0,0,.22);
      --radius:18px;
      --radius-sm:12px;
      --radius-lg:28px;
      --container:1180px;
      --header-h:74px;
      --font:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
      --mono:"DIN Alternate","Roboto Mono","SFMono-Regular",Consolas,monospace;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      font-family:var(--font);
      line-height:1.7;
      color:var(--text);
      background:
        radial-gradient(circle at 14% 0%,rgba(62,232,208,.16),transparent 33%),
        radial-gradient(circle at 86% 18%,rgba(124,92,255,.18),transparent 34%),
        linear-gradient(180deg,#080b11 0%,var(--bg) 44%,#0d121b 100%);
      min-height:100vh;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    ::selection{background:rgba(62,232,208,.28);color:#fff}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .skip-link{
      position:absolute;left:-999px;top:10px;z-index:999;
      padding:10px 14px;border-radius:10px;background:var(--primary);color:#061014;
    }
    .skip-link:focus{left:14px}
    .site-header{
      position:sticky;top:0;z-index:80;
      height:var(--header-h);
      backdrop-filter:blur(18px);
      background:rgba(8,12,18,.78);
      border-bottom:1px solid var(--line);
      transition:box-shadow .25s ease,background .25s ease;
    }
    .site-header:hover{box-shadow:0 10px 26px rgba(0,0,0,.22)}
    .nav-wrap{
      height:var(--header-h);
      display:flex;align-items:center;justify-content:space-between;gap:22px;
    }
    .brand{
      display:flex;align-items:center;gap:12px;min-width:max-content;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--primary-2));
      color:#071014;font-weight:900;font-family:var(--mono);
      box-shadow:0 10px 28px rgba(62,232,208,.2);
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.15}
    .brand-title{font-weight:800;letter-spacing:.2px;font-size:15px}
    .brand-sub{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.9px;text-transform:uppercase}
    .main-nav{display:flex;align-items:center;gap:8px;justify-content:center;flex:1}
    .main-nav a{
      padding:10px 14px;border-radius:999px;color:var(--muted);
      font-size:14px;font-weight:650;
      transition:background .22s ease,color .22s ease,transform .22s ease;
    }
    .main-nav a:hover,.main-nav a:focus{
      color:var(--text);background:rgba(255,255,255,.07);outline:none;transform:translateY(-1px);
    }
    .main-nav a.active{
      color:#061014;background:linear-gradient(135deg,var(--primary),#c6fff6);
      box-shadow:0 10px 24px rgba(62,232,208,.18);
    }
    .nav-actions{display:flex;align-items:center;gap:10px}
    .search-box{
      width:210px;height:42px;border:1px solid var(--line);border-radius:999px;
      display:flex;align-items:center;gap:8px;padding:0 13px;
      background:rgba(255,255,255,.045);
      color:var(--muted);
      transition:border-color .22s ease,background .22s ease;
    }
    .search-box:focus-within{border-color:rgba(62,232,208,.62);background:rgba(62,232,208,.06)}
    .search-box input{
      min-width:0;width:100%;background:transparent;border:0;outline:0;color:var(--text);
      font-size:13px;
    }
    .search-box input::placeholder{color:var(--muted-2)}
    .menu-toggle{display:none}
    .hamburger{
      display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
      background:rgba(255,255,255,.05);align-items:center;justify-content:center;
    }
    .hamburger span,.hamburger span:before,.hamburger span:after{
      content:"";display:block;width:20px;height:2px;border-radius:2px;background:var(--text);position:relative;
      transition:.22s ease;
    }
    .hamburger span:before{position:absolute;top:-7px}
    .hamburger span:after{position:absolute;top:7px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:44px;padding:0 18px;border-radius:999px;
      font-weight:750;font-size:14px;letter-spacing:.1px;
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease,color .22s ease;
      white-space:nowrap;
    }
    .btn:focus{outline:2px solid rgba(62,232,208,.72);outline-offset:3px}
    .btn-primary{
      color:#071014;background:linear-gradient(135deg,var(--primary),#cafff7);
      box-shadow:0 14px 34px rgba(62,232,208,.18);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 46px rgba(62,232,208,.26)}
    .btn-secondary{
      color:var(--text);background:rgba(255,255,255,.07);border:1px solid var(--line);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(62,232,208,.42);background:rgba(62,232,208,.08)}
    .btn-ghost{
      color:var(--primary);background:transparent;border:1px solid rgba(62,232,208,.35);
    }
    .btn-ghost:hover{background:rgba(62,232,208,.08);transform:translateY(-2px)}
    .hero{
      position:relative;min-height:720px;display:flex;align-items:center;
      background-image:
        linear-gradient(90deg,rgba(8,11,17,.94) 0%,rgba(8,11,17,.76) 45%,rgba(8,11,17,.44) 100%),
        url('/assets/images/backpic/back-1.webp');
      background-size:cover;background-position:center;
      overflow:hidden;border-bottom:1px solid var(--line);
    }
    .hero:after{
      content:"";position:absolute;inset:auto -12% -120px -12%;height:260px;
      background:linear-gradient(180deg,transparent,rgba(11,15,23,.95) 52%,var(--bg));
      pointer-events:none;
    }
    .hero-lines{
      position:absolute;inset:0;opacity:.28;
      background:
        linear-gradient(115deg,transparent 0 48%,rgba(62,232,208,.2) 49%,transparent 50% 100%),
        repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 1px,transparent 1px 82px);
      mask-image:linear-gradient(90deg,#000,transparent 76%);
    }
    .hero-inner{position:relative;z-index:2;padding:86px 0 74px}
    .hero-grid{
      display:grid;grid-template-columns:minmax(0,1.04fr) minmax(360px,.72fr);
      gap:38px;align-items:end;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border:1px solid rgba(62,232,208,.25);border-radius:999px;
      color:#bdfcf4;background:rgba(62,232,208,.08);
      font-size:13px;font-weight:750;margin-bottom:18px;
    }
    .eyebrow i{
      width:8px;height:8px;border-radius:50%;background:var(--success);
      box-shadow:0 0 18px var(--success);
    }
    h1{
      max-width:860px;font-size:clamp(38px,6vw,76px);line-height:1.03;letter-spacing:-2.4px;
      font-weight:900;margin-bottom:22px;
    }
    .hero-lead{
      max-width:760px;color:#d4dceb;font-size:18px;line-height:1.9;margin-bottom:30px;
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
    .hero-chips{display:flex;flex-wrap:wrap;gap:12px}
    .data-chip{
      min-width:150px;border:1px solid var(--line);border-radius:16px;
      padding:12px 14px;background:rgba(18,26,37,.72);
      box-shadow:var(--shadow-soft);
    }
    .data-chip strong{display:block;font-family:var(--mono);font-size:24px;line-height:1.15;color:var(--primary)}
    .data-chip span{font-size:12px;color:var(--muted)}
    .match-panel{
      border:1px solid rgba(255,255,255,.16);border-radius:var(--radius-lg);
      background:linear-gradient(180deg,rgba(21,29,41,.84),rgba(13,18,27,.9));
      box-shadow:var(--shadow);padding:22px;position:relative;overflow:hidden;
    }
    .match-panel:before{
      content:"";position:absolute;inset:-1px auto auto -1px;width:54%;height:3px;
      background:linear-gradient(90deg,var(--primary),var(--primary-2),transparent);
    }
    .panel-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;margin-bottom:20px}
    .panel-head h2{font-size:18px;line-height:1.35}
    .status{
      color:#071014;background:var(--accent);border-radius:999px;padding:5px 9px;font-size:12px;font-weight:850;
    }
    .score-row{
      display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;
      padding:16px 0;border-top:1px solid var(--line);
    }
    .team{display:flex;flex-direction:column;gap:4px}
    .team.right{text-align:right}
    .team b{font-size:16px}
    .team span{font-size:12px;color:var(--muted)}
    .score{
      min-width:92px;text-align:center;font-family:var(--mono);font-size:30px;font-weight:900;
      color:#fff;padding:6px 10px;border-radius:14px;
      background:rgba(255,255,255,.06);border:1px solid var(--line);
    }
    .metric-list{display:grid;gap:10px;margin-top:18px}
    .metric{
      display:flex;justify-content:space-between;align-items:center;gap:12px;
      padding:11px 12px;border-radius:13px;background:rgba(255,255,255,.045);
      color:var(--muted);font-size:13px;
    }
    .metric strong{font-family:var(--mono);color:var(--text)}
    main{position:relative;z-index:3}
    .section{padding:82px 0}
    .section.alt{background:linear-gradient(180deg,rgba(255,255,255,.025),rgba(255,255,255,.01));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .section-head{
      display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px;
    }
    .section-title{max-width:760px}
    .section-title .kicker{
      display:inline-block;color:var(--primary);font-family:var(--mono);font-size:12px;font-weight:900;
      letter-spacing:1.5px;text-transform:uppercase;margin-bottom:8px;
    }
    .section-title h2{font-size:clamp(27px,3.4vw,44px);line-height:1.18;letter-spacing:-.8px;margin-bottom:10px}
    .section-title p{color:var(--muted);font-size:15.5px;max-width:780px}
    .focus-layout{
      display:grid;grid-template-columns:minmax(0,1.18fr) minmax(300px,.82fr);
      gap:22px;align-items:stretch;
    }
    .feature-card,.info-card,.compact-card,.team-card,.reference-card,.step-card,.faq-item{
      border:1px solid var(--line);background:linear-gradient(180deg,rgba(21,29,41,.92),rgba(15,22,32,.92));
      border-radius:var(--radius);box-shadow:var(--shadow-soft);
      transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
    }
    .feature-card:hover,.info-card:hover,.compact-card:hover,.team-card:hover,.reference-card:hover,.step-card:hover{
      transform:translateY(-4px);border-color:rgba(62,232,208,.36);box-shadow:0 20px 46px rgba(0,0,0,.32);
    }
    .feature-card{display:grid;grid-template-columns:.95fr 1fr;overflow:hidden;min-height:350px}
    .feature-media{position:relative;min-height:310px;overflow:hidden}
    .feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
    .feature-card:hover .feature-media img{transform:scale(1.04)}
    .feature-media:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(8,11,17,.74))}
    .badge,.tag{
      display:inline-flex;align-items:center;gap:6px;
      border-radius:999px;padding:5px 9px;font-size:12px;font-weight:800;
      border:1px solid rgba(255,255,255,.14);color:#d9fdf8;background:rgba(62,232,208,.09);
    }
    .badge.hot{color:#fff1d8;background:rgba(255,179,71,.12);border-color:rgba(255,179,71,.28)}
    .badge.purple{color:#e7e0ff;background:rgba(124,92,255,.14);border-color:rgba(124,92,255,.3)}
    .feature-body{padding:28px;display:flex;flex-direction:column;justify-content:space-between;gap:18px}
    .feature-body h3{font-size:27px;line-height:1.24;margin-top:12px}
    .feature-body p{color:var(--muted);font-size:15px}
    .card-meta{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:12px}
    .card-meta span{padding:5px 8px;border-radius:999px;background:rgba(255,255,255,.055);border:1px solid var(--line)}
    .side-stack{display:grid;gap:22px}
    .compact-card{padding:22px;display:grid;gap:12px}
    .compact-card h3{font-size:20px;line-height:1.35}
    .compact-card p{color:var(--muted);font-size:14px}
    .mini-score{display:flex;align-items:center;justify-content:space-between;gap:12px;font-family:var(--mono);font-weight:900;color:var(--primary)}
    .worlds-grid{
      display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:stretch;
    }
    .story-card{
      position:relative;overflow:hidden;border-radius:var(--radius-lg);min-height:420px;
      border:1px solid var(--line);background:#111926;box-shadow:var(--shadow);
    }
    .story-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.72}
    .story-card:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,11,17,.18),rgba(8,11,17,.88))}
    .story-content{position:absolute;inset:auto 0 0;padding:30px;z-index:2}
    .story-content h3{font-size:31px;line-height:1.2;margin:12px 0}
    .story-content p{color:#d6deea}
    .timeline{
      display:grid;gap:14px;
    }
    .time-item{
      display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:start;
      padding:18px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.035);
    }
    .time-item strong{font-family:var(--mono);color:var(--primary);font-size:20px}
    .time-item h3{font-size:18px;margin-bottom:4px}
    .time-item p{color:var(--muted);font-size:14px}
    .topic-band{
      border:1px solid rgba(62,232,208,.2);border-radius:var(--radius-lg);
      background:
        linear-gradient(135deg,rgba(62,232,208,.12),rgba(124,92,255,.09)),
        url('/assets/images/backpic/back-2.webp') center/cover;
      overflow:hidden;position:relative;
    }
    .topic-band:before{content:"";position:absolute;inset:0;background:rgba(8,11,17,.76)}
    .topic-inner{position:relative;z-index:1;padding:34px;display:grid;grid-template-columns:1fr .9fr;gap:26px;align-items:center}
    .topic-inner h2{font-size:clamp(28px,3.6vw,46px);line-height:1.15;margin-bottom:14px}
    .topic-inner p{color:#d8e1ee}
    .topic-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .stat-box{
      border:1px solid var(--line);border-radius:18px;padding:18px;background:rgba(15,22,32,.78);
    }
    .stat-box b{display:block;font-family:var(--mono);font-size:32px;color:var(--primary)}
    .stat-box span{font-size:13px;color:var(--muted)}
    .reference-grid{
      display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px;
    }
    .reference-card{padding:22px;position:relative;overflow:hidden}
    .reference-card:before{
      content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;border-radius:50%;
      background:radial-gradient(circle,rgba(62,232,208,.18),transparent 70%);
    }
    .reference-card h3{font-size:20px;margin:14px 0 8px}
    .reference-card p{color:var(--muted);font-size:14px}
    .reference-card a{margin-top:16px;color:var(--primary);font-weight:800;display:inline-flex;gap:6px;align-items:center}
    .teams-layout{
      display:grid;grid-template-columns:.75fr 1.25fr;gap:22px;align-items:start;
    }
    .rank-panel{
      border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;
      background:linear-gradient(180deg,rgba(21,29,41,.96),rgba(12,18,27,.96));
      position:sticky;top:94px;
    }
    .rank-panel h3{font-size:24px;margin-bottom:14px}
    .rank-list{display:grid;gap:10px}
    .rank-list li{
      list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;
      padding:12px;border-radius:14px;background:rgba(255,255,255,.045);border:1px solid var(--line);
    }
    .rank-list em{
      width:28px;height:28px;border-radius:9px;display:grid;place-items:center;font-style:normal;
      background:rgba(62,232,208,.12);color:var(--primary);font-family:var(--mono);font-weight:900;
    }
    .rank-list span{color:var(--muted);font-size:12px}
    .team-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .team-card{overflow:hidden}
    .team-card img{width:100%;height:175px;object-fit:cover;opacity:.88;transition:transform .32s ease}
    .team-card:hover img{transform:scale(1.035)}
    .team-card-body{padding:20px}
    .team-card h3{font-size:20px;margin:10px 0 8px}
    .team-card p{color:var(--muted);font-size:14px}
    .steps{
      display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:stretch;
    }
    .step-card{padding:22px}
    .step-list{display:grid;gap:14px}
    .step-item{
      display:grid;grid-template-columns:42px 1fr;gap:14px;align-items:start;
      padding:14px;border-radius:16px;background:rgba(255,255,255,.04);border:1px solid var(--line);
    }
    .step-num{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      font-family:var(--mono);font-weight:900;color:#061014;background:linear-gradient(135deg,var(--primary),#d6fff9);
    }
    .step-item h3{font-size:18px;margin-bottom:3px}
    .step-item p{font-size:14px;color:var(--muted)}
    .notice-card{
      border-radius:var(--radius-lg);padding:28px;border:1px solid rgba(255,179,71,.28);
      background:linear-gradient(135deg,rgba(255,179,71,.12),rgba(124,92,255,.08));
      min-height:100%;display:flex;flex-direction:column;justify-content:space-between;gap:22px;
    }
    .notice-card h3{font-size:26px;line-height:1.25}
    .notice-card p{color:#e2d7c4}
    .notice-list{display:grid;gap:10px}
    .notice-list li{list-style:none;color:#f5ead8;font-size:14px;display:flex;gap:9px}
    .notice-list li:before{content:"";width:7px;height:7px;margin-top:9px;border-radius:50%;background:var(--accent);flex:0 0 auto}
    .evidence-row{
      display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
    }
    .evidence{
      padding:20px;border-radius:18px;border:1px solid var(--line);
      background:rgba(255,255,255,.04);
    }
    .evidence b{display:block;font-family:var(--mono);font-size:28px;color:var(--primary)}
    .evidence span{color:var(--muted);font-size:13px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .faq-item{padding:22px}
    .faq-item h3{font-size:18px;margin-bottom:8px}
    .faq-item p{color:var(--muted);font-size:14.5px}
    .cta{
      padding:0 0 88px;
    }
    .cta-panel{
      position:relative;overflow:hidden;border-radius:32px;border:1px solid rgba(62,232,208,.25);
      background:
        linear-gradient(110deg,rgba(9,14,21,.94),rgba(16,23,34,.78)),
        url('/assets/images/backpic/back-3.webp') center/cover;
      padding:42px;
      box-shadow:var(--shadow);
    }
    .cta-panel:before{
      content:"";position:absolute;inset:0;
      background:radial-gradient(circle at 78% 20%,rgba(62,232,208,.2),transparent 32%);
      pointer-events:none;
    }
    .cta-content{position:relative;z-index:1;display:flex;justify-content:space-between;gap:24px;align-items:center}
    .cta h2{font-size:clamp(28px,3.5vw,44px);line-height:1.18;margin-bottom:10px}
    .cta p{max-width:720px;color:#d8e0ec}
    .site-footer{
      border-top:1px solid var(--line);background:#080c12;padding:46px 0 24px;
    }
    .footer-grid{
      display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:28px;margin-bottom:28px;
    }
    .footer-brand{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px}
    .footer-title{font-weight:900;font-size:18px;line-height:1.35}
    .footer p,.footer-note{color:var(--muted);font-size:13.5px}
    .footer-col h3{font-size:15px;margin-bottom:12px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{color:var(--muted);font-size:13.5px;transition:color .2s ease}
    .footer-links a:hover{color:var(--primary)}
    .footer-bottom{
      display:flex;justify-content:space-between;gap:16px;align-items:center;
      padding-top:22px;border-top:1px solid var(--line);color:var(--muted-2);font-size:12.5px;
    }
    @media (max-width: 1100px){
      .search-box{display:none}
      .hero-grid,.focus-layout,.worlds-grid,.teams-layout,.steps{grid-template-columns:1fr}
      .rank-panel{position:relative;top:auto}
      .reference-grid{grid-template-columns:repeat(2,1fr)}
      .feature-card{grid-template-columns:1fr}
      .feature-media{min-height:250px}
    }
    @media (max-width: 820px){
      :root{--header-h:66px}
      .container{width:min(100% - 28px,var(--container))}
      .hamburger{display:flex}
      .nav-actions .btn{display:none}
      .main-nav{
        position:absolute;left:14px;right:14px;top:72px;
        display:none;flex-direction:column;align-items:stretch;gap:8px;
        padding:14px;border:1px solid var(--line);border-radius:18px;
        background:rgba(10,15,22,.96);box-shadow:var(--shadow);
      }
      .main-nav a{border-radius:12px;padding:12px 14px}
      .menu-toggle:checked ~ .main-nav{display:flex}
      .menu-toggle:checked + .hamburger span{background:transparent}
      .menu-toggle:checked + .hamburger span:before{top:0;transform:rotate(45deg)}
      .menu-toggle:checked + .hamburger span:after{top:0;transform:rotate(-45deg)}
      .hero{min-height:auto}
      .hero-inner{padding:58px 0 56px}
      h1{letter-spacing:-1.3px}
      .hero-lead{font-size:16px}
      .section{padding:62px 0}
      .section-head{align-items:flex-start;flex-direction:column}
      .topic-inner{grid-template-columns:1fr;padding:26px}
      .team-grid,.faq-grid,.evidence-row{grid-template-columns:1fr}
      .cta-content{flex-direction:column;align-items:flex-start}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{flex-direction:column;align-items:flex-start}
    }
    @media (max-width: 560px){
      .brand-title{font-size:13px;max-width:190px}
      .brand-sub{font-size:10px}
      .hero-actions{display:grid;grid-template-columns:1fr}
      .btn{width:100%}
      .hero-chips{display:grid;grid-template-columns:1fr}
      .data-chip strong{font-size:22px}
      .panel-head{flex-direction:column}
      .score-row{grid-template-columns:1fr;gap:8px}
      .team.right{text-align:left}
      .score{width:100%}
      .reference-grid,.topic-stats{grid-template-columns:1fr}
      .time-item{grid-template-columns:1fr}
      .story-card{min-height:360px}
      .story-content{padding:22px}
      .feature-body{padding:22px}
      .cta-panel{padding:26px;border-radius:24px}
    }

/* roulang page: category1 */
:root{
      --bg:#070b10;
      --bg-2:#0e141c;
      --bg-3:#121b26;
      --panel:#111923;
      --panel-2:#172231;
      --text:#edf6ff;
      --muted:#9caec1;
      --weak:#718294;
      --line:rgba(177,205,235,.16);
      --line-strong:rgba(114,227,255,.36);
      --primary:#6ee7ff;
      --primary-2:#8b5cf6;
      --accent:#f5b451;
      --danger:#ff647c;
      --success:#4ade80;
      --shadow:0 22px 60px rgba(0,0,0,.34);
      --shadow-soft:0 14px 35px rgba(0,0,0,.22);
      --radius-lg:24px;
      --radius-md:18px;
      --radius-sm:12px;
      --container:1180px;
      --header-h:78px;
      --font:"Inter","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 12% 8%,rgba(110,231,255,.12),transparent 26%),
        radial-gradient(circle at 88% 18%,rgba(139,92,246,.13),transparent 30%),
        linear-gradient(180deg,#060910 0%,#0b1118 46%,#070b10 100%);
      line-height:1.7;
      min-height:100vh;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select{font:inherit}
    button{border:0;cursor:pointer}
    ::selection{background:rgba(110,231,255,.32);color:#fff}
    .container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .skip-link{
      position:absolute;left:-999px;top:12px;background:var(--primary);color:#051018;
      padding:10px 14px;border-radius:10px;z-index:999
    }
    .skip-link:focus{left:16px;outline:3px solid rgba(255,255,255,.45)}
    .site-header{
      position:sticky;top:0;z-index:80;
      backdrop-filter:blur(18px);
      background:rgba(7,11,16,.78);
      border-bottom:1px solid var(--line);
      transition:box-shadow .25s ease,background .25s ease
    }
    .site-header.is-scrolled{box-shadow:0 12px 35px rgba(0,0,0,.28);background:rgba(7,11,16,.92)}
    .header-inner{
      min-height:var(--header-h);
      display:flex;align-items:center;justify-content:space-between;gap:24px
    }
    .brand{
      display:flex;align-items:center;gap:12px;min-width:236px
    }
    .brand-mark{
      width:44px;height:44px;border-radius:14px;
      display:inline-flex;align-items:center;justify-content:center;
      color:#061017;font-weight:900;letter-spacing:.5px;
      background:linear-gradient(135deg,var(--primary),#d7fbff 50%,var(--accent));
      box-shadow:0 10px 24px rgba(110,231,255,.22)
    }
    .brand-copy{display:flex;flex-direction:column;line-height:1.18}
    .brand-name{font-weight:900;font-size:15px;letter-spacing:.2px}
    .brand-sub{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1.4px;margin-top:4px}
    .main-nav{
      display:flex;align-items:center;justify-content:center;gap:8px;
      padding:6px;border:1px solid rgba(255,255,255,.06);
      border-radius:999px;background:rgba(255,255,255,.035)
    }
    .main-nav a{
      padding:10px 16px;border-radius:999px;color:var(--muted);
      font-size:14px;font-weight:700;transition:all .22s ease;white-space:nowrap
    }
    .main-nav a:hover{color:var(--text);background:rgba(110,231,255,.08)}
    .main-nav a.active{
      color:#061017;background:linear-gradient(135deg,var(--primary),#b7f6ff);
      box-shadow:0 10px 24px rgba(110,231,255,.22)
    }
    .header-actions{display:flex;align-items:center;gap:12px}
    .mini-search{
      width:198px;height:42px;display:flex;align-items:center;gap:8px;
      border:1px solid var(--line);border-radius:999px;padding:0 14px;
      background:rgba(255,255,255,.045);color:var(--muted)
    }
    .mini-search input{
      width:100%;background:transparent;border:0;outline:0;color:var(--text);
      min-width:0;font-size:13px
    }
    .mini-search input::placeholder{color:#718294}
    .menu-toggle{
      display:none;width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.06);
      color:var(--text);border:1px solid var(--line)
    }
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:44px;padding:0 18px;border-radius:999px;font-weight:850;
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease;
      border:1px solid transparent;white-space:nowrap
    }
    .btn:focus-visible,.main-nav a:focus-visible,.tag:focus-visible,.footer-links a:focus-visible{
      outline:3px solid rgba(110,231,255,.36);outline-offset:3px
    }
    .btn-primary{
      color:#061017;background:linear-gradient(135deg,var(--primary),#e2fbff 56%,var(--accent));
      box-shadow:0 16px 34px rgba(110,231,255,.18)
    }
    .btn-secondary{color:var(--text);background:rgba(255,255,255,.06);border-color:var(--line)}
    .btn-ghost{color:var(--primary);background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.25)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(0,0,0,.25)}
    .btn-secondary:hover,.btn-ghost:hover{border-color:rgba(110,231,255,.48);background:rgba(110,231,255,.11)}
    .page-hero{
      position:relative;isolation:isolate;overflow:hidden;
      padding:76px 0 42px;
      background-image:
        linear-gradient(90deg,rgba(7,11,16,.92),rgba(7,11,16,.73) 46%,rgba(7,11,16,.88)),
        url('/assets/images/backpic/back-2.webp');
      background-size:cover;background-position:center;
      border-bottom:1px solid var(--line)
    }
    .page-hero:before{
      content:"";position:absolute;inset:0;z-index:-1;
      background:
        linear-gradient(110deg,transparent 0 58%,rgba(110,231,255,.08) 58.2%,transparent 62%),
        radial-gradient(circle at 80% 20%,rgba(245,180,81,.15),transparent 28%)
    }
    .breadcrumb{
      display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:24px;
      flex-wrap:wrap
    }
    .breadcrumb a:hover{color:var(--primary)}
    .crumb-dot{width:5px;height:5px;border-radius:50%;background:var(--primary);opacity:.75}
    .hero-panel{
      display:grid;grid-template-columns:1.08fr .92fr;gap:36px;align-items:end
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border:1px solid rgba(110,231,255,.28);
      border-radius:999px;background:rgba(110,231,255,.08);color:var(--primary);
      font-size:13px;font-weight:850;margin-bottom:18px
    }
    .eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 16px rgba(74,222,128,.65)}
    h1{
      font-size:clamp(34px,5.2vw,64px);line-height:1.08;letter-spacing:-1.6px;
      max-width:900px;margin-bottom:18px
    }
    .hero-desc{
      color:#c7d6e8;font-size:17px;max-width:780px;line-height:1.85
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
    .hero-status{
      display:grid;grid-template-columns:repeat(2,1fr);gap:14px;
      padding:18px;border:1px solid var(--line);border-radius:var(--radius-lg);
      background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.035));
      box-shadow:var(--shadow);backdrop-filter:blur(12px)
    }
    .status-card{
      padding:18px;border-radius:18px;background:rgba(7,11,16,.5);
      border:1px solid rgba(255,255,255,.08);position:relative;overflow:hidden
    }
    .status-card.featured{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .status-card:after{
      content:"";position:absolute;right:-30px;top:-30px;width:82px;height:82px;border-radius:50%;
      background:rgba(110,231,255,.08)
    }
    .status-label{font-size:12px;color:var(--muted);font-weight:800}
    .status-value{font-size:30px;line-height:1.15;font-weight:950;margin-top:8px;font-variant-numeric:tabular-nums}
    .status-note{font-size:13px;color:var(--weak);margin-top:5px}
    .status-card.featured .status-value{font-size:38px;color:var(--primary)}
    .section{padding:72px 0}
    .section.alt{background:linear-gradient(180deg,rgba(255,255,255,.025),rgba(255,255,255,.01));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .section-head{
      display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:28px
    }
    .section-kicker{color:var(--primary);font-size:13px;font-weight:900;letter-spacing:.08em;margin-bottom:8px}
    .section-title{font-size:clamp(26px,3.2vw,40px);line-height:1.18;letter-spacing:-.8px}
    .section-desc{color:var(--muted);max-width:680px;margin-top:10px}
    .filter-bar{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:14px;border-radius:20px;border:1px solid var(--line);
      background:rgba(255,255,255,.045);box-shadow:var(--shadow-soft);margin-top:28px
    }
    .tag-list{display:flex;gap:10px;overflow-x:auto;padding-bottom:1px;scrollbar-width:thin}
    .tag{
      flex:0 0 auto;border:1px solid var(--line);background:rgba(255,255,255,.04);
      color:var(--muted);border-radius:999px;padding:9px 14px;font-size:13px;font-weight:800;
      transition:all .22s ease
    }
    .tag:hover,.tag.active{color:#061017;background:var(--primary);border-color:var(--primary)}
    .sort-control{
      display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;white-space:nowrap
    }
    .sort-control select{
      appearance:none;color:var(--text);border:1px solid var(--line);border-radius:999px;
      background:#0d151e;padding:9px 32px 9px 12px;outline:0
    }
    .feature-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .feature-card,.info-card,.scenario-card,.step-card,.risk-card,.faq-item,.cta-box{
      border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.035));
      border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);overflow:hidden;
      transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease
    }
    .feature-card:hover,.info-card:hover,.scenario-card:hover,.step-card:hover,.risk-card:hover{
      transform:translateY(-4px);border-color:rgba(110,231,255,.36);box-shadow:0 24px 48px rgba(0,0,0,.28)
    }
    .feature-img{height:315px;position:relative;overflow:hidden}
    .feature-img img,.media-card img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
    .feature-card:hover .feature-img img,.media-card:hover img{transform:scale(1.045)}
    .img-shade{position:absolute;inset:0;background:linear-gradient(180deg,transparent 38%,rgba(7,11,16,.92))}
    .badge{
      display:inline-flex;align-items:center;gap:6px;border-radius:999px;
      background:rgba(110,231,255,.11);border:1px solid rgba(110,231,255,.28);
      color:var(--primary);padding:6px 10px;font-size:12px;font-weight:900
    }
    .badge.hot{background:rgba(245,180,81,.12);border-color:rgba(245,180,81,.32);color:var(--accent)}
    .feature-body{padding:24px}
    .feature-body h2,.info-card h3,.scenario-card h3,.step-card h3,.risk-card h3{line-height:1.3}
    .feature-body h2{font-size:28px;margin:14px 0 10px}
    .card-text{color:var(--muted);font-size:15px}
    .metric-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .metric{
      border:1px solid rgba(255,255,255,.08);background:rgba(7,11,16,.38);
      border-radius:999px;padding:8px 11px;color:#c8d7e8;font-size:13px;font-weight:750
    }
    .side-stack{display:grid;gap:18px}
    .info-card{padding:22px;display:flex;flex-direction:column;justify-content:space-between;min-height:192px}
    .info-card h3{font-size:21px;margin:12px 0 8px}
    .card-link{
      display:inline-flex;align-items:center;gap:6px;color:var(--primary);
      margin-top:18px;font-weight:900
    }
    .card-link:hover{color:#d9fbff}
    .scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .scenario-card{padding:24px;position:relative}
    .scenario-card:before{
      content:"";position:absolute;left:24px;right:24px;top:0;height:3px;
      background:linear-gradient(90deg,var(--primary),var(--primary-2),transparent)
    }
    .icon-box{
      width:48px;height:48px;border-radius:16px;display:flex;align-items:center;justify-content:center;
      background:rgba(110,231,255,.1);border:1px solid rgba(110,231,255,.22);
      color:var(--primary);font-weight:950;margin-bottom:16px
    }
    .scenario-card h3{font-size:20px;margin-bottom:9px}
    .process-wrap{display:grid;grid-template-columns:.88fr 1.12fr;gap:28px;align-items:center}
    .media-card{
      border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);background:var(--panel);
      box-shadow:var(--shadow);position:relative;min-height:430px
    }
    .media-card img{height:430px}
    .media-caption{
      position:absolute;left:18px;right:18px;bottom:18px;padding:18px;border-radius:18px;
      background:rgba(7,11,16,.74);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.12)
    }
    .media-caption strong{display:block;font-size:20px;margin-bottom:5px}
    .media-caption span{color:var(--muted);font-size:14px}
    .steps{display:grid;gap:14px}
    .step-card{padding:20px;display:grid;grid-template-columns:54px 1fr;gap:16px;align-items:start}
    .step-num{
      width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--primary-2),var(--primary));
      color:#071018;font-size:20px;font-weight:950;display:flex;align-items:center;justify-content:center;
      font-variant-numeric:tabular-nums
    }
    .step-card h3{font-size:19px;margin-bottom:5px}
    .data-strip{
      display:grid;grid-template-columns:1fr 1fr 1fr 1.25fr;gap:14px;margin-top:26px
    }
    .data-cell{
      padding:18px;border-radius:18px;border:1px solid var(--line);
      background:rgba(255,255,255,.045)
    }
    .data-cell span{display:block;color:var(--muted);font-size:12px;font-weight:850}
    .data-cell strong{display:block;font-size:24px;margin-top:8px;font-variant-numeric:tabular-nums}
    .risk-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .risk-card{padding:24px}
    .risk-card h3{font-size:22px;margin:12px 0 10px}
    .check-list{list-style:none;display:grid;gap:12px;margin-top:18px}
    .check-list li{
      display:flex;gap:10px;color:#cbd9ea;padding:12px;border-radius:14px;background:rgba(255,255,255,.035);
      border:1px solid rgba(255,255,255,.06)
    }
    .check-list li:before{content:"✓";color:var(--success);font-weight:950}
    .check-list.warn li:before{content:"!";color:var(--accent)}
    .faq-list{display:grid;gap:14px;max-width:930px;margin:0 auto}
    .faq-item{padding:0}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
      padding:22px 24px;background:transparent;color:var(--text);text-align:left;font-weight:900;font-size:17px
    }
    .faq-q span:last-child{
      width:30px;height:30px;border-radius:10px;background:rgba(110,231,255,.09);
      display:flex;align-items:center;justify-content:center;color:var(--primary);flex:0 0 auto
    }
    .faq-a{display:none;padding:0 24px 22px;color:var(--muted)}
    .faq-item.open{border-color:rgba(110,231,255,.32)}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q span:last-child{background:var(--primary);color:#071018}
    .cta-section{padding:76px 0 86px}
    .cta-box{
      position:relative;padding:42px;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
      background:
        linear-gradient(135deg,rgba(110,231,255,.14),rgba(139,92,246,.11)),
        linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.035));
      overflow:hidden
    }
    .cta-box:after{
      content:"";position:absolute;right:-90px;top:-120px;width:320px;height:320px;border-radius:50%;
      background:rgba(110,231,255,.12);filter:blur(2px)
    }
    .cta-box h2{font-size:clamp(26px,3.4vw,42px);line-height:1.18;margin-bottom:10px;position:relative;z-index:1}
    .cta-box p{color:#c7d6e8;max-width:760px;position:relative;z-index:1}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
    .site-footer{
      border-top:1px solid var(--line);background:#06090e;padding:56px 0 24px;color:var(--muted)
    }
    .footer-grid{display:grid;grid-template-columns:1.35fr .7fr .85fr;gap:36px}
    .footer-brand{display:flex;align-items:flex-start;gap:14px}
    .footer-title{color:var(--text);font-weight:950;font-size:18px;margin-bottom:8px}
    .footer-note{
      margin-top:18px;padding:14px;border:1px solid rgba(245,180,81,.22);
      background:rgba(245,180,81,.08);border-radius:14px;color:#d6c5a5;font-size:13px
    }
    .footer-col h3{color:var(--text);font-size:15px;margin-bottom:14px}
    .footer-links{display:grid;gap:10px}
    .footer-links a{color:var(--muted);transition:color .2s ease,transform .2s ease}
    .footer-links a:hover{color:var(--primary);transform:translateX(3px)}
    .footer-bottom{
      margin-top:34px;padding-top:18px;border-top:1px solid var(--line);
      display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--weak)
    }
    @media (max-width:1100px){
      .mini-search{display:none}
      .brand{min-width:auto}
      .feature-layout,.process-wrap{grid-template-columns:1fr}
      .data-strip{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:860px){
      :root{--header-h:66px}
      .container{width:min(100% - 28px,var(--container))}
      .header-inner{flex-wrap:wrap;gap:12px;padding:12px 0}
      .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
      .main-nav{
        order:3;width:100%;display:none;border-radius:18px;justify-content:flex-start;overflow-x:auto
      }
      .main-nav.open{display:flex}
      .main-nav a{padding:10px 14px}
      .header-actions .btn{display:none}
      .page-hero{padding:42px 0 34px}
      .hero-panel{grid-template-columns:1fr;align-items:start}
      .hero-status{grid-template-columns:1fr 1fr}
      .section{padding:54px 0}
      .section-head{display:block}
      .filter-bar{align-items:flex-start;flex-direction:column}
      .scenario-grid{grid-template-columns:1fr}
      .risk-layout{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .cta-box{grid-template-columns:1fr;padding:30px}
    }
    @media (max-width:560px){
      .brand-name{font-size:13px;max-width:180px}
      h1{letter-spacing:-.8px}
      .hero-actions,.cta-actions{flex-direction:column}
      .btn{width:100%}
      .hero-status{grid-template-columns:1fr}
      .status-card.featured{display:block}
      .feature-img{height:230px}
      .feature-body{padding:20px}
      .feature-body h2{font-size:23px}
      .data-strip{grid-template-columns:1fr}
      .step-card{grid-template-columns:1fr}
      .media-card,.media-card img{min-height:300px;height:300px}
      .footer-bottom{display:grid}
    }