/* roulang page: index */
:root{
      --bg:#111015;
      --bg-deep:#0b0a0e;
      --bg-soft:#18161e;
      --card:#1f1b26;
      --card-2:#241f2d;
      --text:#f7f1e8;
      --muted:#b9b1a7;
      --weak:#7f7780;
      --primary:#f2a65a;
      --primary-2:#ffd29a;
      --secondary:#c65dff;
      --accent:#ff6b8a;
      --line:rgba(255,255,255,.10);
      --line-strong:rgba(242,166,90,.32);
      --shadow:0 20px 60px rgba(0,0,0,.35);
      --shadow-soft:0 14px 40px rgba(0,0,0,.24);
      --radius:24px;
      --radius-sm:16px;
      --radius-pill:999px;
      --container:1200px;
      --nav-h:72px;
      --ease:all .25s ease;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-width:320px;
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 6%, rgba(242,166,90,.14), transparent 34%),
        radial-gradient(circle at 86% 20%, rgba(198,93,255,.11), transparent 32%),
        radial-gradient(circle at 74% 92%, rgba(255,107,138,.08), transparent 32%),
        var(--bg);
      line-height:1.75;
      overflow-x:hidden;
    }
    body.nav-open{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(242,166,90,.32);color:var(--text)}
    :focus-visible{outline:3px solid rgba(242,166,90,.42);outline-offset:3px;border-radius:10px}

    .container{
      width:min(calc(100% - 40px), var(--container));
      margin:0 auto;
    }
    .section{padding:84px 0}
    .section-tight{padding:64px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border:1px solid rgba(242,166,90,.22);
      border-radius:var(--radius-pill);
      color:var(--primary-2);
      background:rgba(242,166,90,.10);
      font-size:13px;
      font-weight:650;
      letter-spacing:.02em;
    }
    .eyebrow::before{
      content:"";
      width:7px;height:7px;border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 5px rgba(255,107,138,.10);
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      gap:28px;
      align-items:flex-end;
      margin-bottom:30px;
    }
    .section-head h2{
      margin:14px 0 0;
      font-size:clamp(26px,3vw,38px);
      line-height:1.22;
      letter-spacing:-.04em;
    }
    .section-head p{
      margin:0;
      max-width:560px;
      color:var(--muted);
      font-size:16px;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:100;
      height:var(--nav-h);
      background:rgba(17,16,21,.86);
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .nav-wrap{
      height:var(--nav-h);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:22px;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:11px;
      min-width:max-content;
      font-weight:800;
      letter-spacing:-.03em;
    }
    .brand-mark{
      width:40px;height:40px;
      display:grid;
      place-items:center;
      border-radius:14px;
      background:linear-gradient(145deg, var(--primary), var(--accent));
      box-shadow:0 12px 28px rgba(242,166,90,.18);
      color:#161114;
      position:relative;
      overflow:hidden;
    }
    .brand-mark::before{
      content:"";
      width:0;height:0;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid #20151a;
      margin-left:3px;
      z-index:2;
    }
    .brand-mark::after{
      content:"";
      position:absolute;
      inset:-12px;
      background:linear-gradient(90deg, transparent, rgba(255,255,255,.28), transparent);
      transform:rotate(25deg) translateX(-36px);
      transition:var(--ease);
    }
    .brand:hover .brand-mark::after{transform:rotate(25deg) translateX(36px)}
    .brand-text{font-size:18px}
    .nav-links{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:6px;
      padding:5px;
      border:1px solid rgba(255,255,255,.07);
      border-radius:var(--radius-pill);
      background:rgba(255,255,255,.035);
    }
    .nav-links a{
      min-height:42px;
      display:inline-flex;
      align-items:center;
      padding:0 15px;
      border-radius:var(--radius-pill);
      color:var(--muted);
      font-size:14px;
      transition:var(--ease);
      position:relative;
    }
    .nav-links a:hover,
    .nav-links a.active{
      color:var(--text);
      background:rgba(242,166,90,.10);
    }
    .nav-cta{display:flex;align-items:center;gap:10px}
    .menu-toggle{
      display:none;
      width:44px;height:44px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.04);
      color:var(--text);
      border-radius:14px;
    }
    .menu-toggle span{
      display:block;
      width:18px;height:2px;
      margin:4px auto;
      background:currentColor;
      border-radius:2px;
      transition:var(--ease);
    }
    .nav-open .menu-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .nav-open .menu-toggle span:nth-child(2){opacity:0}
    .nav-open .menu-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:0 20px;
      border:0;
      border-radius:var(--radius-pill);
      font-weight:750;
      transition:var(--ease);
      white-space:nowrap;
    }
    .btn-primary{
      color:#1b1115;
      background:linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow:0 16px 34px rgba(242,166,90,.20);
    }
    .btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 22px 46px rgba(255,107,138,.22)}
    .btn-ghost{
      color:var(--primary-2);
      background:rgba(255,255,255,.035);
      border:1px solid rgba(242,166,90,.24);
    }
    .btn-ghost:hover{transform:translateY(-2px);border-color:rgba(242,166,90,.55);background:rgba(242,166,90,.09)}
    .btn-small{
      min-height:38px;
      padding:0 14px;
      font-size:14px;
    }
    .link-arrow{
      display:inline-flex;
      align-items:center;
      gap:7px;
      color:var(--primary-2);
      font-weight:700;
      transition:var(--ease);
    }
    .link-arrow::after{content:"→";transition:var(--ease)}
    .link-arrow:hover{color:var(--accent)}
    .link-arrow:hover::after{transform:translateX(4px)}

    .hero{
      position:relative;
      min-height:calc(100vh - var(--nav-h));
      display:flex;
      align-items:center;
      padding:76px 0 70px;
      overflow:hidden;
      border-bottom:1px solid rgba(255,255,255,.07);
    }
    .hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg, rgba(17,16,21,.96) 0%, rgba(17,16,21,.76) 48%, rgba(17,16,21,.92) 100%),
        linear-gradient(180deg, rgba(17,16,21,.08), rgba(17,16,21,1)),
        url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
      z-index:-2;
    }
    .hero::after{
      content:"";
      position:absolute;
      inset:0;
      background-image:linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.7), transparent 78%);
      z-index:-1;
      opacity:.55;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.03fr) minmax(360px,.78fr);
      gap:42px;
      align-items:center;
    }
    .hero-copy{
      max-width:760px;
      padding-top:10px;
    }
    .hero h1{
      margin:18px 0 18px;
      font-size:clamp(36px,5.2vw,62px);
      line-height:1.12;
      letter-spacing:-.07em;
      font-weight:850;
    }
    .hero h1 span{
      color:transparent;
      background:linear-gradient(135deg, var(--primary-2), var(--accent) 65%, var(--secondary));
      -webkit-background-clip:text;
      background-clip:text;
    }
    .hero-sub{
      max-width:680px;
      margin:0 0 28px;
      color:var(--muted);
      font-size:18px;
      line-height:1.85;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-bottom:28px;
    }
    .feature-pills{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .feature-pills li{
      display:inline-flex;
      align-items:center;
      gap:8px;
      min-height:36px;
      padding:0 12px;
      border:1px solid rgba(255,255,255,.10);
      border-radius:var(--radius-pill);
      background:rgba(31,27,38,.74);
      color:var(--muted);
      font-size:13px;
    }
    .feature-pills li::before{
      content:"";
      width:6px;height:6px;border-radius:50%;
      background:var(--primary);
    }

    .hero-panel{
      position:relative;
      border:1px solid rgba(255,255,255,.12);
      border-radius:30px;
      background:linear-gradient(180deg, rgba(31,27,38,.84), rgba(15,14,18,.92));
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .hero-panel .screen{
      position:relative;
      aspect-ratio:4/3;
      overflow:hidden;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .hero-panel .screen img{
      width:100%;
      height:100%;
      object-fit:cover;
      transform:scale(1.02);
      filter:saturate(.92) contrast(1.06) brightness(.72);
    }
    .hero-panel .screen::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, transparent 20%, rgba(17,16,21,.86) 100%), radial-gradient(circle at 70% 35%, rgba(198,93,255,.20), transparent 34%);
    }
    .play-orb{
      position:absolute;
      left:50%;
      top:50%;
      transform:translate(-50%,-50%);
      width:74px;
      height:74px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:rgba(242,166,90,.92);
      box-shadow:0 0 0 12px rgba(242,166,90,.14), 0 20px 44px rgba(0,0,0,.36);
      z-index:2;
    }
    .play-orb::before{
      content:"";
      width:0;height:0;
      border-top:12px solid transparent;
      border-bottom:12px solid transparent;
      border-left:18px solid #211217;
      margin-left:5px;
    }
    .panel-meta{
      padding:22px;
    }
    .panel-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      margin-bottom:16px;
    }
    .panel-title strong{font-size:18px}
    .status{
      display:inline-flex;
      align-items:center;
      gap:7px;
      color:var(--primary-2);
      font-size:13px;
    }
    .status::before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:#6cffb1;
      box-shadow:0 0 0 5px rgba(108,255,177,.12);
    }
    .search-card{
      display:flex;
      gap:10px;
      padding:10px;
      border:1px solid rgba(255,255,255,.10);
      border-radius:18px;
      background:rgba(8,7,10,.44);
    }
    .search-card input{
      width:100%;
      min-height:42px;
      border:0;
      outline:none;
      color:var(--text);
      background:transparent;
      padding:0 8px;
    }
    .search-card input::placeholder{color:var(--weak)}
    .panel-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:16px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      min-height:28px;
      padding:0 10px;
      border-radius:var(--radius-pill);
      color:var(--primary-2);
      background:rgba(242,166,90,.11);
      border:1px solid rgba(242,166,90,.16);
      font-size:12px;
      font-weight:650;
    }
    .tag.purple{color:#e0bdff;background:rgba(198,93,255,.12);border-color:rgba(198,93,255,.18)}
    .tag.pink{color:#ffc1cd;background:rgba(255,107,138,.12);border-color:rgba(255,107,138,.18)}
    .update-ribbon{
      margin-top:34px;
      display:flex;
      align-items:center;
      gap:14px;
      padding:14px 16px;
      border:1px solid rgba(255,255,255,.10);
      border-radius:18px;
      background:rgba(31,27,38,.62);
      color:var(--muted);
      max-width:820px;
    }
    .ribbon-icon{
      width:36px;height:36px;border-radius:12px;
      display:grid;place-items:center;
      background:rgba(242,166,90,.12);
      color:var(--primary-2);
      flex:0 0 auto;
    }

    .trust-strip{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:1px;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.10);
      border-radius:var(--radius);
      background:rgba(255,255,255,.08);
      box-shadow:var(--shadow-soft);
    }
    .trust-item{
      display:flex;
      gap:14px;
      align-items:flex-start;
      padding:24px;
      background:rgba(24,22,30,.92);
    }
    .trust-icon{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;
      flex:0 0 auto;
      color:var(--primary-2);
      background:rgba(242,166,90,.10);
      border:1px solid rgba(242,166,90,.14);
      font-weight:800;
    }
    .trust-item h3{margin:0 0 4px;font-size:17px}
    .trust-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}

    .showcase-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:22px;
      align-items:stretch;
    }
    .feature-card,
    .small-card,
    .note-card,
    .article-card,
    .compare-card,
    .faq-item,
    .cta-box{
      border:1px solid rgba(255,255,255,.10);
      background:linear-gradient(180deg, rgba(31,27,38,.96), rgba(24,22,30,.96));
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
    }
    .feature-card:hover,
    .small-card:hover,
    .article-card:hover,
    .compare-card:hover{
      transform:translateY(-3px);
      border-color:rgba(242,166,90,.34);
      box-shadow:0 22px 56px rgba(0,0,0,.34);
    }
    .cover{
      position:relative;
      overflow:hidden;
      border-radius:calc(var(--radius) - 1px);
      background:#0e0c12;
    }
    .cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      filter:saturate(.9) brightness(.72);
      transition:transform .35s ease;
    }
    .feature-card:hover .cover img,
    .small-card:hover .cover img{transform:scale(1.035)}
    .cover::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(0,0,0,.04), rgba(17,16,21,.88));
    }
    .feature-card{
      overflow:hidden;
      min-height:100%;
    }
    .feature-card .cover{height:360px;border-bottom-left-radius:0;border-bottom-right-radius:0}
    .feature-card .card-body{padding:26px}
    .card-body h3{margin:12px 0 10px;font-size:25px;line-height:1.32;letter-spacing:-.03em}
    .card-body p{margin:0 0 18px;color:var(--muted)}
    .meta-row{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:10px;
      color:var(--weak);
      font-size:13px;
    }
    .side-stack{display:grid;grid-template-rows:auto auto 1fr;gap:22px}
    .small-card{
      display:grid;
      grid-template-columns:160px 1fr;
      overflow:hidden;
      min-height:172px;
    }
    .small-card .cover{border-radius:0;min-height:172px}
    .small-card .card-body{padding:20px}
    .small-card h3{margin:10px 0 8px;font-size:19px;line-height:1.35}
    .small-card p{margin:0 0 12px;color:var(--muted);font-size:14px;line-height:1.65}
    .note-card{
      padding:24px;
      background:
        radial-gradient(circle at 92% 8%, rgba(198,93,255,.14), transparent 42%),
        rgba(31,27,38,.9);
    }
    .note-card h3{margin:0 0 14px;font-size:20px}
    .note-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
    .note-list li{
      display:flex;
      gap:11px;
      color:var(--muted);
      font-size:14px;
    }
    .note-list li::before{
      content:"";
      width:9px;height:9px;border-radius:50%;
      margin-top:9px;
      background:var(--primary);
      box-shadow:0 0 0 5px rgba(242,166,90,.10);
      flex:0 0 auto;
    }

    .path-section{
      position:relative;
      background:linear-gradient(180deg, rgba(24,22,30,.18), rgba(24,22,30,.46));
      border-block:1px solid rgba(255,255,255,.06);
    }
    .path-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      counter-reset:path;
    }
    .path-card{
      position:relative;
      min-height:210px;
      padding:24px;
      border:1px solid rgba(255,255,255,.10);
      border-radius:22px;
      background:rgba(31,27,38,.72);
      overflow:hidden;
    }
    .path-card::before{
      counter-increment:path;
      content:"0" counter(path);
      display:inline-grid;
      place-items:center;
      width:42px;height:42px;
      margin-bottom:20px;
      border-radius:15px;
      color:#211217;
      background:linear-gradient(135deg, var(--primary), var(--accent));
      font-weight:850;
    }
    .path-card::after{
      content:"";
      position:absolute;
      right:-30px;bottom:-30px;
      width:130px;height:130px;border-radius:50%;
      background:rgba(198,93,255,.08);
    }
    .path-card h3{margin:0 0 10px;font-size:19px}
    .path-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}

    .updates-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 340px;
      gap:24px;
      align-items:start;
    }
    .article-list{display:grid;gap:16px}
    .article-card{
      position:relative;
      display:grid;
      grid-template-columns:1fr auto;
      gap:18px;
      padding:22px 22px 22px 26px;
      overflow:hidden;
    }
    .article-card::before{
      content:"";
      position:absolute;
      left:0;top:18px;bottom:18px;
      width:4px;
      border-radius:4px;
      background:linear-gradient(180deg, var(--primary), var(--secondary));
    }
    .article-card h3{
      margin:10px 0 8px;
      font-size:20px;
      line-height:1.38;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .article-card p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      line-height:1.72;
      display:-webkit-box;
      -webkit-line-clamp:3;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .article-action{
      align-self:center;
      padding-left:8px;
    }
    .empty-state{
      padding:36px;
      text-align:center;
      border:1px dashed rgba(242,166,90,.32);
      border-radius:var(--radius);
      background:rgba(31,27,38,.62);
    }
    .empty-icon{
      width:58px;height:58px;
      margin:0 auto 14px;
      display:grid;place-items:center;
      border-radius:20px;
      background:rgba(242,166,90,.10);
      color:var(--primary-2);
      font-size:24px;
    }
    .empty-state p{margin:0 0 18px;color:var(--muted)}
    .sidebar-card{
      position:sticky;
      top:calc(var(--nav-h) + 20px);
      padding:24px;
      border:1px solid rgba(255,255,255,.10);
      border-radius:var(--radius);
      background:
        linear-gradient(180deg, rgba(31,27,38,.96), rgba(15,14,18,.94)),
        url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    .sidebar-card::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(31,27,38,.88), rgba(15,14,18,.96));
      z-index:-1;
    }
    .sidebar-card h3{margin:0 0 12px;font-size:21px}
    .sidebar-card p{margin:0 0 18px;color:var(--muted);font-size:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
    .side-tips{margin:20px 0 0;padding:18px 0 0;border-top:1px solid rgba(255,255,255,.08);list-style:none;display:grid;gap:12px}
    .side-tips li{color:var(--muted);font-size:14px;display:flex;gap:9px}
    .side-tips li::before{content:"•";color:var(--primary);font-weight:900}

    .compare-grid{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:22px;
      align-items:stretch;
    }
    .compare-card{padding:28px}
    .compare-card.highlight{
      background:
        radial-gradient(circle at 90% 10%, rgba(242,166,90,.15), transparent 38%),
        linear-gradient(180deg, rgba(35,30,41,.96), rgba(24,22,30,.96));
    }
    .compare-number{
      font-size:46px;
      line-height:1;
      font-weight:850;
      color:transparent;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      -webkit-background-clip:text;
      background-clip:text;
      margin-bottom:12px;
    }
    .compare-card h3{margin:0 0 12px;font-size:22px}
    .compare-card p{margin:0;color:var(--muted)}
    .check-list{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:12px;
      margin:20px 0 0;
      padding:0;
      list-style:none;
    }
    .check-list li{
      padding:13px 14px;
      border:1px solid rgba(255,255,255,.09);
      border-radius:15px;
      background:rgba(255,255,255,.035);
      color:var(--muted);
      font-size:14px;
    }
    .check-list li::before{
      content:"✓";
      color:var(--primary);
      font-weight:900;
      margin-right:8px;
    }

    .gallery-band{
      display:grid;
      grid-template-columns:1fr 1fr 1fr;
      gap:18px;
    }
    .gallery-card{
      position:relative;
      min-height:250px;
      overflow:hidden;
      border-radius:var(--radius);
      border:1px solid rgba(255,255,255,.10);
      box-shadow:var(--shadow-soft);
    }
    .gallery-card img{
      width:100%;height:100%;object-fit:cover;
      filter:brightness(.64) saturate(.88);
      transition:transform .35s ease;
    }
    .gallery-card:hover img{transform:scale(1.035)}
    .gallery-card::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, transparent 22%, rgba(12,10,15,.92));
    }
    .gallery-text{
      position:absolute;
      left:22px;right:22px;bottom:20px;
      z-index:2;
    }
    .gallery-text h3{margin:10px 0 6px;font-size:20px}
    .gallery-text p{margin:0;color:var(--muted);font-size:14px}

    .faq-wrap{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:28px;
      align-items:start;
    }
    .faq-intro{
      padding:28px;
      border-radius:var(--radius);
      background:linear-gradient(180deg, rgba(31,27,38,.72), rgba(24,22,30,.62));
      border:1px solid rgba(255,255,255,.09);
    }
    .faq-intro h2{margin:14px 0 12px;font-size:clamp(26px,3vw,36px);line-height:1.25}
    .faq-intro p{margin:0;color:var(--muted)}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden;background:rgba(31,27,38,.84)}
    .faq-question{
      width:100%;
      min-height:64px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:18px 20px;
      border:0;
      color:var(--text);
      background:transparent;
      text-align:left;
      font-weight:750;
    }
    .faq-question .arrow{
      width:26px;height:26px;
      display:grid;place-items:center;
      flex:0 0 auto;
      border-radius:50%;
      color:var(--primary);
      background:rgba(242,166,90,.10);
      transition:var(--ease);
    }
    .faq-answer{
      max-height:0;
      overflow:hidden;
      transition:max-height .28s ease;
    }
    .faq-answer p{
      margin:0;
      padding:0 20px 20px;
      color:var(--muted);
    }
    .faq-item.open{
      border-color:rgba(242,166,90,.34);
      background:rgba(35,30,41,.92);
    }
    .faq-item.open .arrow{transform:rotate(45deg);background:rgba(255,107,138,.13);color:var(--accent)}
    .faq-item.open .faq-answer{max-height:180px}

    .cta-section{padding:80px 0 96px}
    .cta-box{
      position:relative;
      overflow:hidden;
      padding:36px;
      display:grid;
      grid-template-columns:.88fr 1.12fr;
      gap:30px;
      align-items:center;
      background:
        radial-gradient(circle at 12% 22%, rgba(242,166,90,.20), transparent 35%),
        radial-gradient(circle at 92% 4%, rgba(198,93,255,.18), transparent 38%),
        linear-gradient(135deg, rgba(31,27,38,.98), rgba(20,18,25,.98));
    }
    .cta-copy h2{margin:14px 0 12px;font-size:clamp(27px,3.4vw,42px);line-height:1.2;letter-spacing:-.04em}
    .cta-copy p{margin:0 0 20px;color:var(--muted)}
    .mini-note{
      padding:16px;
      border:1px solid rgba(255,255,255,.09);
      border-radius:18px;
      background:rgba(0,0,0,.16);
      color:var(--muted);
      font-size:14px;
    }
    .feedback-form{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:14px;
    }
    .field{display:grid;gap:7px}
    .field.full{grid-column:1/-1}
    .field label{color:var(--muted);font-size:13px}
    .field input,
    .field textarea{
      width:100%;
      border:1px solid rgba(255,255,255,.12);
      border-radius:15px;
      background:#141219;
      color:var(--text);
      padding:13px 14px;
      outline:none;
      transition:var(--ease);
    }
    .field textarea{min-height:110px;resize:vertical}
    .field input::placeholder,
    .field textarea::placeholder{color:var(--weak)}
    .field input:focus,
    .field textarea:focus{
      border-color:rgba(242,166,90,.72);
      box-shadow:0 0 0 4px rgba(242,166,90,.12);
    }
    .form-actions{
      grid-column:1/-1;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }
    .form-hint{color:var(--weak);font-size:13px}

    .site-footer{
      background:linear-gradient(180deg, rgba(11,10,14,.78), #08070a);
      border-top:1px solid rgba(255,255,255,.08);
      padding:46px 0 24px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .9fr;
      gap:34px;
      align-items:start;
    }
    .footer-title{
      display:flex;
      align-items:center;
      gap:11px;
      margin-bottom:14px;
      font-weight:850;
      font-size:18px;
    }
    .footer-desc{margin:0;color:var(--muted);max-width:520px}
    .footer-col h3{margin:0 0 14px;font-size:16px}
    .footer-links{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .footer-links a{
      color:var(--muted);
      transition:var(--ease);
    }
    .footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:5px}
    .footer-note{
      color:var(--muted);
      font-size:14px;
      margin:0;
    }
    .copyright{
      margin-top:34px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.08);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      color:var(--weak);
      font-size:13px;
    }

    @media (max-width: 1080px){
      .hero-grid,.showcase-grid,.updates-layout,.compare-grid,.faq-wrap,.cta-box{grid-template-columns:1fr}
      .hero-panel{max-width:720px}
      .trust-strip{grid-template-columns:repeat(2,1fr)}
      .path-grid{grid-template-columns:repeat(2,1fr)}
      .sidebar-card{position:relative;top:auto}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 820px){
      :root{--nav-h:64px}
      .container{width:min(calc(100% - 28px), var(--container))}
      .section{padding:58px 0}
      .section-tight{padding:48px 0}
      .nav-links{
        position:fixed;
        left:14px;right:14px;top:74px;
        display:none;
        padding:12px;
        border-radius:22px;
        background:rgba(17,16,21,.97);
        box-shadow:var(--shadow);
      }
      .nav-open .nav-links{display:grid}
      .nav-links a{justify-content:center;border-radius:14px}
      .nav-cta .btn{display:none}
      .menu-toggle{display:block}
      .hero{min-height:auto;padding:54px 0 50px}
      .hero-grid{gap:28px}
      .hero-sub{font-size:16px}
      .update-ribbon{align-items:flex-start}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .small-card{grid-template-columns:1fr}
      .small-card .cover{height:190px}
      .article-card{grid-template-columns:1fr}
      .article-action{padding-left:0}
      .gallery-band{grid-template-columns:1fr}
      .check-list{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width: 560px){
      .brand-text{font-size:16px}
      .brand-mark{width:36px;height:36px;border-radius:12px}
      .hero h1{font-size:34px}
      .hero-actions{display:grid;grid-template-columns:1fr}
      .btn{width:100%}
      .search-card{display:grid}
      .search-card .btn{width:100%}
      .trust-strip{grid-template-columns:1fr}
      .trust-item{padding:20px}
      .path-grid{grid-template-columns:1fr}
      .feature-card .cover{height:260px}
      .card-body h3{font-size:22px}
      .cta-box{padding:24px}
      .feedback-form{grid-template-columns:1fr}
      .form-actions{display:grid}
      .footer-title{align-items:flex-start}
    }

/* roulang page: article */
:root{
      --bg:#111015;
      --bg-deep:#0b0a0e;
      --bg-soft:#18161e;
      --card:#1f1b26;
      --card-2:#241f2d;
      --text:#f7f1e8;
      --muted:#b9b1a7;
      --weak:#7f7780;
      --primary:#f2a65a;
      --primary-2:#ffd29a;
      --secondary:#c65dff;
      --accent:#ff6b8a;
      --line:rgba(255,255,255,.10);
      --line-strong:rgba(242,166,90,.32);
      --shadow:0 20px 60px rgba(0,0,0,.35);
      --shadow-soft:0 14px 40px rgba(0,0,0,.24);
      --radius:24px;
      --radius-sm:16px;
      --radius-pill:999px;
      --container:1200px;
      --nav-h:72px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-width:320px;
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 6%, rgba(242,166,90,.14), transparent 34%),
        radial-gradient(circle at 86% 20%, rgba(198,93,255,.11), transparent 32%),
        radial-gradient(circle at 74% 92%, rgba(255,107,138,.08), transparent 32%),
        var(--bg);
      line-height:1.75;
      overflow-x:hidden;
    }
    body.nav-open{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(242,166,90,.35);color:var(--text)}
    :focus-visible{
      outline:3px solid rgba(242,166,90,.45);
      outline-offset:3px;
      border-radius:12px;
    }
    .container{
      width:min(calc(100% - 40px), var(--container));
      margin:0 auto;
    }
    .section{padding:84px 0}
    .section-tight{padding:64px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border:1px solid rgba(242,166,90,.22);
      border-radius:var(--radius-pill);
      color:var(--primary-2);
      background:rgba(242,166,90,.10);
      font-size:13px;
      font-weight:650;
      letter-spacing:.02em;
    }
    .eyebrow::before{
      content:"";
      width:7px;height:7px;border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 5px rgba(255,107,138,.10);
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:100;
      height:var(--nav-h);
      background:rgba(17,16,21,.86);
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .nav-wrap{
      height:var(--nav-h);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:22px;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:11px;
      min-width:max-content;
      font-weight:800;
      letter-spacing:-.03em;
    }
    .brand-mark{
      width:40px;height:40px;
      display:grid;
      place-items:center;
      border-radius:14px;
      background:linear-gradient(145deg, var(--primary), var(--accent));
      box-shadow:0 12px 28px rgba(242,166,90,.18);
      color:#161114;
      position:relative;
      overflow:hidden;
      flex:0 0 auto;
    }
    .brand-mark::before{
      content:"";
      width:0;height:0;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid #20151a;
      margin-left:3px;
      z-index:2;
    }
    .brand-mark::after{
      content:"";
      position:absolute;
      inset:-12px;
      background:linear-gradient(90deg, transparent, rgba(255,255,255,.28), transparent);
      transform:rotate(25deg) translateX(-36px);
      transition:var(--ease);
    }
    .brand:hover .brand-mark::after{transform:rotate(25deg) translateX(36px)}
    .brand-text{font-size:18px}
    .nav-links{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:6px;
      padding:5px;
      border:1px solid rgba(255,255,255,.07);
      border-radius:var(--radius-pill);
      background:rgba(255,255,255,.035);
    }
    .nav-links a{
      min-height:42px;
      display:inline-flex;
      align-items:center;
      padding:0 15px;
      border-radius:var(--radius-pill);
      color:var(--muted);
      font-size:14px;
      transition:var(--ease);
      position:relative;
    }
    .nav-links a:hover,
    .nav-links a.active{
      color:var(--text);
      background:rgba(242,166,90,.10);
    }
    .nav-cta{display:flex;align-items:center;gap:10px}
    .menu-toggle{
      display:none;
      width:44px;height:44px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.04);
      color:var(--text);
      border-radius:14px;
    }
    .menu-toggle span{
      display:block;
      width:18px;height:2px;
      margin:4px auto;
      background:currentColor;
      border-radius:2px;
      transition:var(--ease);
    }
    .nav-open .menu-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .nav-open .menu-toggle span:nth-child(2){opacity:0}
    .nav-open .menu-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:0 20px;
      border:0;
      border-radius:var(--radius-pill);
      font-weight:750;
      transition:var(--ease);
      white-space:nowrap;
      text-decoration:none;
    }
    .btn-primary{
      color:#1b1115;
      background:linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow:0 16px 34px rgba(242,166,90,.20);
    }
    .btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 22px 46px rgba(255,107,138,.22);color:#1b1115}
    .btn-ghost{
      color:var(--primary-2);
      background:rgba(255,255,255,.035);
      border:1px solid rgba(242,166,90,.24);
    }
    .btn-ghost:hover{transform:translateY(-2px);border-color:rgba(242,166,90,.55);background:rgba(242,166,90,.09);color:var(--primary-2)}
    .btn-small{
      min-height:38px;
      padding:0 14px;
      font-size:14px;
    }
    .link-arrow{
      display:inline-flex;
      align-items:center;
      gap:7px;
      color:var(--primary-2);
      font-weight:700;
      transition:var(--ease);
    }
    .link-arrow::after{content:"→";transition:var(--ease)}
    .link-arrow:hover{color:var(--accent)}
    .link-arrow:hover::after{transform:translateX(4px)}
    .badge-soft{
      display:inline-flex;
      align-items:center;
      gap:7px;
      min-height:28px;
      padding:4px 11px;
      border-radius:var(--radius-pill);
      border:1px solid rgba(255,255,255,.09);
      background:rgba(255,255,255,.045);
      color:var(--muted);
      font-size:13px;
      line-height:1.2;
    }
    .badge-warm{
      border-color:rgba(242,166,90,.24);
      background:rgba(242,166,90,.11);
      color:var(--primary-2);
    }
    .site-main{position:relative;z-index:1}
    .article-hero{
      position:relative;
      padding:64px 0 52px;
      overflow:hidden;
      background:
        linear-gradient(180deg, rgba(17,16,21,.50), var(--bg)),
        linear-gradient(90deg, rgba(17,16,21,.92), rgba(17,16,21,.60), rgba(17,16,21,.92)),
        url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .article-hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 22% 26%, rgba(242,166,90,.18), transparent 32%),
        radial-gradient(circle at 78% 22%, rgba(198,93,255,.14), transparent 28%);
      pointer-events:none;
    }
    .article-hero .container{position:relative;z-index:1}
    .breadcrumb{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      margin:0 0 24px;
      padding:0;
      color:var(--weak);
      font-size:14px;
    }
    .breadcrumb a{
      color:var(--muted);
      transition:var(--ease);
    }
    .breadcrumb a:hover{color:var(--primary-2)}
    .breadcrumb .sep{color:rgba(255,255,255,.28)}
    .article-title-wrap{
      max-width:900px;
    }
    .article-title-wrap h1{
      margin:16px 0 18px;
      font-size:clamp(32px,5vw,56px);
      line-height:1.14;
      font-weight:820;
      letter-spacing:-.055em;
      color:var(--text);
    }
    .article-summary{
      max-width:820px;
      margin:0;
      color:var(--muted);
      font-size:17px;
      line-height:1.85;
    }
    .article-meta{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:10px;
      margin-top:24px;
    }
    .reader-layout{
      display:grid;
      grid-template-columns:minmax(0, 1fr) 310px;
      gap:34px;
      align-items:start;
    }
    .article-card{
      background:rgba(24,22,30,.86);
      border:1px solid rgba(255,255,255,.09);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .article-cover{
      position:relative;
      min-height:280px;
      overflow:hidden;
      background:var(--card);
    }
    .article-cover img{
      width:100%;
      height:100%;
      min-height:280px;
      object-fit:cover;
      filter:saturate(.92) contrast(1.04);
      transform:scale(1.01);
    }
    .article-cover::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(17,16,21,.10), rgba(17,16,21,.78));
    }
    .cover-caption{
      position:absolute;
      left:24px;
      right:24px;
      bottom:22px;
      z-index:2;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }
    .cover-caption strong{
      font-size:18px;
      letter-spacing:-.02em;
    }
    .article-body{
      padding:38px 42px 44px;
      color:#eee5d9;
      font-size:17px;
      line-height:1.9;
      overflow-wrap:anywhere;
    }
    .article-body h2,
    .article-body h3,
    .article-body h4{
      color:var(--text);
      letter-spacing:-.035em;
      line-height:1.35;
      margin:2.1em 0 .75em;
      font-weight:780;
    }
    .article-body h2{
      font-size:clamp(24px,3vw,32px);
      padding-top:.2em;
    }
    .article-body h3{font-size:22px}
    .article-body h4{font-size:19px}
    .article-body p{margin:0 0 1.15em}
    .article-body a{
      color:var(--primary-2);
      border-bottom:1px solid rgba(242,166,90,.38);
      transition:var(--ease);
    }
    .article-body a:hover{
      color:var(--accent);
      border-bottom-color:rgba(255,107,138,.55);
    }
    .article-body ul,
    .article-body ol{
      margin:0 0 1.25em;
      padding-left:1.35em;
    }
    .article-body li{margin:.45em 0}
    .article-body ul li::marker{color:var(--primary)}
    .article-body ol li::marker{color:var(--primary-2);font-weight:800}
    .article-body blockquote{
      margin:1.6em 0;
      padding:18px 22px;
      border-left:4px solid var(--primary);
      border-radius:0 var(--radius-sm) var(--radius-sm) 0;
      background:rgba(242,166,90,.08);
      color:var(--primary-2);
    }
    .article-body img{
      width:100%;
      border-radius:18px;
      border:1px solid rgba(255,255,255,.10);
      margin:1.8em 0 .7em;
      box-shadow:var(--shadow-soft);
    }
    .article-body figure{margin:1.8em 0}
    .article-body figcaption{
      color:var(--weak);
      font-size:14px;
      text-align:center;
      margin-top:8px;
    }
    .article-body table{
      width:100%;
      border-collapse:collapse;
      margin:1.6em 0;
      min-width:640px;
    }
    .article-body table th,
    .article-body table td{
      border:1px solid rgba(255,255,255,.10);
      padding:12px 14px;
      text-align:left;
    }
    .article-body table th{
      background:rgba(242,166,90,.09);
      color:var(--primary-2);
    }
    .article-body table tr:nth-child(even) td{background:rgba(255,255,255,.025)}
    .article-body pre{
      max-width:100%;
      overflow:auto;
      padding:18px;
      border-radius:16px;
      background:#0f0d13;
      border:1px solid rgba(255,255,255,.09);
      color:#f2dfc9;
    }
    .empty-state{
      padding:34px;
      border:1px dashed rgba(242,166,90,.28);
      border-radius:22px;
      background:rgba(242,166,90,.07);
      text-align:center;
    }
    .empty-icon{
      width:58px;height:58px;
      margin:0 auto 16px;
      display:grid;
      place-items:center;
      border-radius:20px;
      background:linear-gradient(145deg, rgba(242,166,90,.20), rgba(198,93,255,.16));
      color:var(--primary-2);
      font-size:26px;
    }
    .empty-state h2{
      margin:0 0 10px;
      font-size:26px;
      letter-spacing:-.03em;
    }
    .empty-state p{
      margin:0 auto 20px;
      max-width:520px;
      color:var(--muted);
    }
    .sidebar{
      position:sticky;
      top:calc(var(--nav-h) + 22px);
      display:grid;
      gap:18px;
    }
    .side-card{
      background:rgba(31,27,38,.88);
      border:1px solid rgba(255,255,255,.09);
      border-radius:22px;
      padding:22px;
      box-shadow:var(--shadow-soft);
    }
    .side-card h2,
    .side-card h3{
      margin:0 0 14px;
      font-size:20px;
      line-height:1.35;
      letter-spacing:-.03em;
    }
    .side-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .toc-list,
    .quick-list,
    .footer-links{
      list-style:none;
      padding:0;
      margin:0;
    }
    .toc-list{display:grid;gap:8px}
    .toc-list a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      min-height:38px;
      padding:8px 11px;
      border-radius:13px;
      color:var(--muted);
      background:rgba(255,255,255,.03);
      transition:var(--ease);
    }
    .toc-list a:hover{
      color:var(--primary-2);
      background:rgba(242,166,90,.09);
      transform:translateX(2px);
    }
    .quick-list{display:grid;gap:12px;margin-top:12px}
    .quick-list li{
      display:flex;
      gap:10px;
      color:var(--muted);
      font-size:14px;
    }
    .quick-list li::before{
      content:"";
      width:8px;height:8px;
      border-radius:50%;
      background:var(--primary);
      margin-top:9px;
      box-shadow:0 0 0 5px rgba(242,166,90,.09);
      flex:0 0 auto;
    }
    .notice-card{
      background:
        linear-gradient(145deg, rgba(242,166,90,.12), rgba(198,93,255,.10)),
        rgba(31,27,38,.88);
    }
    .notice-card .btn{width:100%;margin-top:16px}
    .section-head{
      display:flex;
      justify-content:space-between;
      gap:28px;
      align-items:flex-end;
      margin-bottom:30px;
    }
    .section-head h2{
      margin:14px 0 0;
      font-size:clamp(26px,3vw,38px);
      line-height:1.22;
      letter-spacing:-.04em;
    }
    .section-head p{
      margin:0;
      max-width:560px;
      color:var(--muted);
      font-size:16px;
    }
    .related-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:22px;
    }
    .related-main,
    .related-stack .related-card{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius);
      border:1px solid rgba(255,255,255,.09);
      background:var(--card);
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
    }
    .related-main:hover,
    .related-stack .related-card:hover{
      transform:translateY(-3px);
      border-color:rgba(242,166,90,.32);
      box-shadow:var(--shadow);
    }
    .related-main img{
      width:100%;
      height:330px;
      object-fit:cover;
      transition:var(--ease);
    }
    .related-main:hover img{transform:scale(1.03)}
    .related-main::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(17,16,21,.08), rgba(17,16,21,.90));
    }
    .related-main-content{
      position:absolute;
      z-index:2;
      left:24px;
      right:24px;
      bottom:24px;
    }
    .related-main-content h3{
      margin:12px 0 8px;
      font-size:25px;
      line-height:1.32;
      letter-spacing:-.035em;
    }
    .related-main-content p{
      margin:0 0 16px;
      color:var(--muted);
    }
    .related-stack{
      display:grid;
      gap:18px;
    }
    .related-card{
      padding:22px;
    }
    .related-card h3{
      margin:12px 0 8px;
      font-size:21px;
      letter-spacing:-.025em;
    }
    .related-card p{
      margin:0 0 14px;
      color:var(--muted);
      font-size:15px;
    }
    .faq-wrap{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:32px;
      align-items:start;
    }
    .faq-intro{
      padding:28px;
      border:1px solid rgba(255,255,255,.09);
      border-radius:var(--radius);
      background:
        radial-gradient(circle at 10% 0%, rgba(242,166,90,.16), transparent 38%),
        rgba(31,27,38,.75);
      box-shadow:var(--shadow-soft);
    }
    .faq-intro h2{
      margin:14px 0 12px;
      font-size:clamp(26px,3vw,36px);
      letter-spacing:-.04em;
      line-height:1.22;
    }
    .faq-intro p{margin:0;color:var(--muted)}
    .accordion-list{display:grid;gap:14px}
    .faq-item{
      border:1px solid rgba(255,255,255,.09);
      border-radius:20px;
      background:rgba(31,27,38,.82);
      overflow:hidden;
      transition:var(--ease);
    }
    .faq-item.is-open{
      border-color:rgba(242,166,90,.30);
      background:rgba(36,31,45,.92);
    }
    .faq-question{
      width:100%;
      min-height:62px;
      padding:18px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      border:0;
      background:transparent;
      color:var(--text);
      text-align:left;
      font-weight:750;
    }
    .faq-question .arrow{
      width:28px;height:28px;
      display:grid;
      place-items:center;
      border-radius:50%;
      color:var(--primary-2);
      background:rgba(242,166,90,.09);
      transition:var(--ease);
      flex:0 0 auto;
    }
    .faq-item.is-open .faq-question .arrow{transform:rotate(45deg)}
    .faq-panel{
      max-height:0;
      overflow:hidden;
      transition:max-height .28s ease;
    }
    .faq-panel p{
      margin:0;
      padding:0 20px 20px;
      color:var(--muted);
      font-size:15px;
    }
    .cta-card{
      position:relative;
      overflow:hidden;
      display:grid;
      grid-template-columns:1fr 420px;
      gap:30px;
      align-items:center;
      padding:34px;
      border-radius:32px;
      border:1px solid rgba(255,255,255,.10);
      background:
        radial-gradient(circle at 16% 15%, rgba(242,166,90,.24), transparent 32%),
        radial-gradient(circle at 82% 75%, rgba(198,93,255,.18), transparent 34%),
        rgba(31,27,38,.92);
      box-shadow:var(--shadow);
    }
    .cta-card::before{
      content:"";
      position:absolute;
      inset:auto -80px -100px auto;
      width:260px;height:260px;
      border-radius:50%;
      background:rgba(255,107,138,.13);
      filter:blur(22px);
    }
    .cta-content{position:relative;z-index:1}
    .cta-content h2{
      margin:14px 0 12px;
      font-size:clamp(28px,4vw,42px);
      line-height:1.18;
      letter-spacing:-.045em;
    }
    .cta-content p{
      margin:0;
      color:var(--muted);
      max-width:650px;
    }
    .feedback-form{
      position:relative;
      z-index:1;
      display:grid;
      gap:12px;
      padding:20px;
      border-radius:24px;
      border:1px solid rgba(255,255,255,.09);
      background:rgba(11,10,14,.45);
    }
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .field{
      width:100%;
      min-height:46px;
      padding:12px 14px;
      border-radius:15px;
      border:1px solid rgba(255,255,255,.12);
      background:#141219;
      color:var(--text);
      transition:var(--ease);
    }
    textarea.field{min-height:96px;resize:vertical}
    .field::placeholder{color:var(--weak)}
    .field:focus{
      outline:none;
      border-color:rgba(242,166,90,.62);
      box-shadow:0 0 0 4px rgba(242,166,90,.12);
    }
    .form-tip{
      margin:0;
      color:var(--weak);
      font-size:13px;
    }
    .site-footer{
      padding:58px 0 26px;
      background:var(--bg-deep);
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .7fr 1fr;
      gap:34px;
      align-items:start;
    }
    .footer-title{
      display:flex;
      align-items:center;
      gap:12px;
      font-size:20px;
      font-weight:820;
      letter-spacing:-.035em;
      margin-bottom:14px;
    }
    .footer-desc,
    .footer-note{
      color:var(--muted);
      margin:0;
      max-width:460px;
      font-size:14px;
    }
    .footer-col h3{
      margin:0 0 14px;
      font-size:16px;
      color:var(--text);
    }
    .footer-links{display:grid;gap:9px}
    .footer-links a{
      color:var(--muted);
      font-size:14px;
      transition:var(--ease);
    }
    .footer-links a:hover{
      color:var(--primary-2);
      padding-left:4px;
    }
    .copyright{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      margin-top:38px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.08);
      color:var(--weak);
      font-size:13px;
    }
    @media (max-width:1199px){
      :root{--container:1040px}
      .reader-layout{grid-template-columns:minmax(0,1fr) 286px;gap:24px}
      .article-body{padding:34px}
      .cta-card{grid-template-columns:1fr 380px}
    }
    @media (max-width:991px){
      :root{--nav-h:64px}
      .nav-links{
        position:fixed;
        left:20px;
        right:20px;
        top:calc(var(--nav-h) + 12px);
        display:grid;
        justify-content:stretch;
        padding:12px;
        border-radius:22px;
        background:rgba(17,16,21,.96);
        box-shadow:var(--shadow);
        transform:translateY(-14px);
        opacity:0;
        pointer-events:none;
        transition:var(--ease);
      }
      .nav-open .nav-links{
        transform:translateY(0);
        opacity:1;
        pointer-events:auto;
      }
      .nav-links a{
        min-height:48px;
        justify-content:center;
      }
      .menu-toggle{display:block}
      .nav-cta .btn{display:none}
      .reader-layout{grid-template-columns:1fr}
      .sidebar{position:static;grid-template-columns:1fr 1fr}
      .related-grid,
      .faq-wrap,
      .cta-card{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-grid > div:first-child{grid-column:1/-1}
    }
    @media (max-width:767px){
      .container{width:min(calc(100% - 28px), var(--container))}
      .section{padding:58px 0}
      .section-tight{padding:46px 0}
      .brand-text{font-size:16px}
      .brand-mark{width:38px;height:38px;border-radius:13px}
      .article-hero{padding:42px 0 38px}
      .article-summary{font-size:16px}
      .article-cover,
      .article-cover img{min-height:210px}
      .cover-caption{
        left:18px;
        right:18px;
        bottom:18px;
      }
      .article-body{
        padding:26px 22px 30px;
        font-size:16px;
        line-height:1.85;
      }
      .sidebar{grid-template-columns:1fr}
      .section-head{
        display:block;
      }
      .section-head p{margin-top:12px}
      .related-main img{height:280px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{
        flex-direction:column;
        align-items:flex-start;
      }
      .cta-card{padding:24px}
      .form-row{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      .container{width:min(calc(100% - 24px), var(--container))}
      .breadcrumb{font-size:13px}
      .article-title-wrap h1{font-size:32px}
      .article-meta{gap:8px}
      .badge-soft{font-size:12px}
      .article-body{padding:22px 18px 26px}
      .cover-caption{display:block}
      .cover-caption .badge-soft{margin-top:10px}
      .related-main-content{
        left:18px;
        right:18px;
        bottom:18px;
      }
      .related-main-content h3{font-size:22px}
      .btn{width:100%}
      .nav-wrap{gap:12px}
    }

/* 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}