/* roulang page: index */
:root{
      --bg:#0b0912;
      --bg-2:#12101d;
      --bg-3:#191626;
      --panel:#171422;
      --panel-2:#201c2e;
      --card:#1c1828;
      --card-soft:#231f33;
      --text:#f5f2ec;
      --muted:#b7afc6;
      --muted-2:#887f9d;
      --line:rgba(255,255,255,.1);
      --line-strong:rgba(255,255,255,.18);
      --brand:#ffb15c;
      --brand-2:#2be7d0;
      --brand-3:#d6c3ff;
      --success:#65e6b3;
      --warning:#ffd37a;
      --shadow:0 24px 70px rgba(0,0,0,.35);
      --shadow-soft:0 14px 36px rgba(0,0,0,.22);
      --radius-xs:10px;
      --radius-sm:14px;
      --radius-md:18px;
      --radius-lg:26px;
      --radius-xl:34px;
      --sidebar:236px;
      --container:1180px;
      --ease:cubic-bezier(.2,.8,.2,1);
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 15% 8%, rgba(255,177,92,.18), transparent 28%),
        radial-gradient(circle at 85% 18%, rgba(43,231,208,.14), transparent 30%),
        linear-gradient(135deg,#08070d 0%,#111020 48%,#090811 100%);
      line-height:1.75;
      min-height:100vh;
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
      background-size:44px 44px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.55), transparent 72%);
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(255,177,92,.35);color:#fff}

    .skip-link{
      position:absolute;
      left:16px;
      top:-80px;
      z-index:1000;
      padding:10px 14px;
      border-radius:12px;
      background:var(--brand);
      color:#17100b;
      font-weight:700;
      transition:.2s var(--ease);
    }
    .skip-link:focus{top:14px;outline:3px solid rgba(255,255,255,.35)}

    .app-shell{min-height:100vh}
    .sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--sidebar);
      padding:22px 16px;
      background:rgba(14,12,22,.86);
      border-right:1px solid var(--line);
      backdrop-filter:blur(18px);
      z-index:80;
      display:flex;
      flex-direction:column;
      gap:22px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-height:54px;
      padding:8px 10px;
      border-radius:18px;
      background:linear-gradient(135deg,rgba(255,177,92,.12),rgba(43,231,208,.08));
      border:1px solid var(--line);
    }
    .brand-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#110b08;
      font-weight:900;
      letter-spacing:-1px;
      background:
        radial-gradient(circle at 30% 22%, #fff3cf 0 12%, transparent 13%),
        linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 10px 28px rgba(255,177,92,.18);
      flex:0 0 auto;
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.25}
    .brand-text strong{font-size:15px;letter-spacing:.02em}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-label{
      padding:0 12px;
      color:var(--muted-2);
      font-size:12px;
      letter-spacing:.12em;
      margin-top:4px;
    }
    .side-nav{
      display:flex;
      flex-direction:column;
      gap:8px;
    }
    .nav-item{
      display:flex;
      align-items:center;
      gap:12px;
      padding:12px 12px;
      border-radius:16px;
      color:var(--muted);
      border:1px solid transparent;
      transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
      position:relative;
    }
    .nav-icon{
      width:30px;height:30px;
      border-radius:12px;
      display:grid;
      place-items:center;
      background:rgba(255,255,255,.06);
      color:var(--brand-3);
      flex:0 0 auto;
    }
    .nav-item:hover{
      color:#fff;
      background:rgba(255,255,255,.06);
      border-color:var(--line);
      transform:translateX(2px);
    }
    .nav-item.active{
      color:#fff;
      background:linear-gradient(135deg,rgba(255,177,92,.18),rgba(43,231,208,.1));
      border-color:rgba(255,177,92,.28);
      box-shadow:inset 0 0 0 1px rgba(255,255,255,.04);
    }
    .nav-item.active .nav-icon{
      color:#110b08;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
    }
    .side-status{
      margin-top:auto;
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.045);
      border:1px solid var(--line);
    }
    .status-dot{
      display:inline-flex;
      align-items:center;
      gap:8px;
      font-size:13px;
      color:var(--muted);
    }
    .status-dot::before{
      content:"";
      width:9px;height:9px;border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 6px rgba(101,230,179,.12);
    }
    .side-status p{margin:10px 0 0;color:var(--muted-2);font-size:12px;line-height:1.6}

    .mobile-topbar{
      display:none;
      position:sticky;
      top:0;
      z-index:90;
      padding:12px 16px;
      background:rgba(12,10,18,.88);
      backdrop-filter:blur(16px);
      border-bottom:1px solid var(--line);
    }
    .mobile-topbar-inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
    }
    .menu-toggle{
      width:42px;height:42px;
      border:1px solid var(--line);
      border-radius:14px;
      background:rgba(255,255,255,.06);
      color:#fff;
      display:grid;
      place-items:center;
      transition:.2s var(--ease);
    }
    .menu-toggle:hover,.menu-toggle:focus{border-color:rgba(255,177,92,.55);box-shadow:0 0 0 4px rgba(255,177,92,.12);outline:none}
    .mobile-panel{
      display:none;
      margin-top:12px;
      padding:10px;
      border:1px solid var(--line);
      border-radius:18px;
      background:rgba(20,17,31,.96);
      box-shadow:var(--shadow-soft);
    }
    .mobile-panel.open{display:block}

    .main{
      margin-left:var(--sidebar);
      min-height:100vh;
    }
    .container{
      width:min(var(--container), calc(100% - 48px));
      margin:0 auto;
    }
    .section{
      padding:72px 0;
      position:relative;
    }
    .section.compact{padding:48px 0}
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:28px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border:1px solid var(--line);
      border-radius:999px;
      color:var(--brand);
      background:rgba(255,177,92,.08);
      font-size:13px;
      font-weight:700;
      letter-spacing:.02em;
    }
    .eyebrow::before{
      content:"";
      width:7px;height:7px;border-radius:50%;
      background:var(--brand-2);
      box-shadow:0 0 16px rgba(43,231,208,.75);
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      margin:18px 0 18px;
      max-width:820px;
      font-size:clamp(36px,5vw,70px);
      line-height:1.08;
      letter-spacing:-.045em;
    }
    h2{
      font-size:clamp(26px,3vw,42px);
      line-height:1.18;
      letter-spacing:-.03em;
      margin-bottom:10px;
    }
    h3{font-size:20px;line-height:1.35;margin-bottom:8px}
    .lead{
      max-width:760px;
      color:var(--muted);
      font-size:18px;
      line-height:1.9;
      margin-bottom:0;
    }
    .muted{color:var(--muted)}
    .text-small{font-size:14px;color:var(--muted-2)}

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:12px 18px;
      border-radius:15px;
      border:1px solid transparent;
      font-weight:800;
      letter-spacing:.01em;
      transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),opacity .2s var(--ease);
      user-select:none;
      white-space:nowrap;
    }
    .btn-primary{
      color:#130d08;
      background:linear-gradient(135deg,var(--brand),#ffd79a);
      box-shadow:0 16px 36px rgba(255,177,92,.2);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 44px rgba(255,177,92,.28)}
    .btn-primary:active{transform:translateY(0);box-shadow:0 10px 24px rgba(255,177,92,.18)}
    .btn-secondary{
      color:var(--text);
      background:rgba(255,255,255,.06);
      border-color:var(--line-strong);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(43,231,208,.45);box-shadow:0 14px 30px rgba(43,231,208,.09)}
    .btn:focus-visible{
      outline:none;
      box-shadow:0 0 0 4px rgba(43,231,208,.2),0 0 0 1px rgba(43,231,208,.55);
    }
    .btn[disabled],.btn.disabled{
      opacity:.48;
      pointer-events:none;
      filter:saturate(.55);
    }
    .link-arrow{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:var(--brand);
      font-weight:800;
      font-size:14px;
      transition:.2s var(--ease);
    }
    .link-arrow:hover{gap:10px;color:#ffd79a}

    .hero{
      padding:58px 0 38px;
      min-height:720px;
      display:flex;
      align-items:center;
    }
    .hero-wrap{
      display:grid;
      grid-template-columns:minmax(0,1.15fr) minmax(340px,.85fr);
      gap:34px;
      align-items:center;
    }
    .hero-copy{
      padding:38px;
      border-radius:var(--radius-xl);
      background:linear-gradient(145deg,rgba(255,255,255,.075),rgba(255,255,255,.025));
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .hero-copy::after{
      content:"";
      position:absolute;
      width:280px;height:280px;
      right:-110px;top:-120px;
      background:radial-gradient(circle,rgba(43,231,208,.25),transparent 64%);
      filter:blur(6px);
      pointer-events:none;
    }
    .hero-actions{
      display:flex;
      align-items:center;
      gap:14px;
      flex-wrap:wrap;
      margin-top:30px;
    }
    .hero-tags{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:28px;
    }
    .tag,.badge{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:7px 11px;
      border-radius:999px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.055);
      color:var(--muted);
      font-size:13px;
      font-weight:650;
    }
    .tag.hot{color:#16100a;background:rgba(255,177,92,.95);border-color:transparent}
    .tag.cyan{color:#dffdfa;background:rgba(43,231,208,.1);border-color:rgba(43,231,208,.28)}
    .badge.new{color:#0f1715;background:rgba(101,230,179,.95);border-color:transparent}
    .badge.recommend{color:#1a1208;background:rgba(255,211,122,.95);border-color:transparent}

    .hero-visual{
      border-radius:var(--radius-xl);
      min-height:560px;
      background:
        radial-gradient(circle at 28% 18%,rgba(255,177,92,.22),transparent 28%),
        radial-gradient(circle at 72% 28%,rgba(43,231,208,.18),transparent 26%),
        linear-gradient(160deg,rgba(35,31,51,.9),rgba(16,14,25,.9));
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      padding:24px;
      position:relative;
      overflow:hidden;
    }
    .hero-visual::before{
      content:"";
      position:absolute;
      inset:18px;
      border-radius:28px;
      border:1px solid rgba(255,255,255,.09);
      background:
        linear-gradient(90deg,transparent 0 48%,rgba(255,255,255,.08) 49% 50%,transparent 51%),
        linear-gradient(transparent 0 48%,rgba(255,255,255,.08) 49% 50%,transparent 51%);
      background-size:86px 86px;
      opacity:.42;
    }
    .visual-card{
      position:relative;
      z-index:1;
      border-radius:24px;
      background:rgba(10,9,16,.58);
      border:1px solid var(--line);
      padding:20px;
      backdrop-filter:blur(12px);
    }
    .visual-card + .visual-card{margin-top:16px}
    .mini-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-bottom:18px;
    }
    .mini-title{font-weight:900;font-size:17px}
    .pulse{
      width:12px;height:12px;border-radius:50%;
      background:var(--brand-2);
      box-shadow:0 0 0 8px rgba(43,231,208,.12),0 0 24px rgba(43,231,208,.5);
    }
    .progress{
      width:100%;
      height:10px;
      background:rgba(255,255,255,.08);
      border-radius:999px;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.08);
    }
    .progress span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--brand),var(--brand-2));
    }
    .metric-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-top:18px;
    }
    .metric{
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.055);
      border:1px solid var(--line);
    }
    .metric strong{display:block;font-size:24px;line-height:1.1}
    .metric span{font-size:12px;color:var(--muted)}
    .signal-list{
      display:grid;
      gap:10px;
    }
    .signal-item{
      display:flex;
      justify-content:space-between;
      gap:12px;
      padding:11px 12px;
      border-radius:15px;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(255,255,255,.07);
      color:var(--muted);
      font-size:14px;
    }
    .signal-item strong{color:var(--text)}

    .quick-strip{
      margin-top:-18px;
      padding-bottom:32px;
    }
    .strip-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:16px;
    }
    .strip-card{
      padding:18px;
      border-radius:20px;
      background:rgba(255,255,255,.055);
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      transition:.2s var(--ease);
    }
    .strip-card:hover{transform:translateY(-3px);border-color:rgba(255,177,92,.32);background:rgba(255,255,255,.075)}
    .strip-card b{display:block;font-size:18px;margin-bottom:4px}
    .strip-card span{color:var(--muted);font-size:14px}

    .route-section{
      background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012));
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
    }
    .timeline{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      position:relative;
    }
    .timeline::before{
      content:"";
      position:absolute;
      left:8%;
      right:8%;
      top:32px;
      height:2px;
      background:linear-gradient(90deg,rgba(255,177,92,.45),rgba(43,231,208,.35));
      opacity:.6;
    }
    .step-card{
      position:relative;
      z-index:1;
      padding:20px;
      border-radius:22px;
      background:rgba(24,21,34,.86);
      border:1px solid var(--line);
      transition:.2s var(--ease);
    }
    .step-card:hover{transform:translateY(-3px);border-color:rgba(43,231,208,.35);box-shadow:var(--shadow-soft)}
    .step-no{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      color:#120d08;
      font-weight:900;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      margin-bottom:20px;
      box-shadow:0 10px 28px rgba(43,231,208,.12);
    }
    .step-card p{color:var(--muted);font-size:14px;margin-bottom:12px}

    .preview-layout{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:18px;
      align-items:stretch;
    }
    .feature-card{
      position:relative;
      min-height:260px;
      padding:24px;
      border-radius:28px;
      border:1px solid var(--line);
      background:linear-gradient(145deg,rgba(255,255,255,.075),rgba(255,255,255,.025));
      overflow:hidden;
      transition:.24s var(--ease);
      box-shadow:var(--shadow-soft);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .feature-card:hover{
      transform:translateY(-4px);
      border-color:rgba(255,177,92,.42);
      box-shadow:0 26px 60px rgba(0,0,0,.28);
    }
    .feature-card::after{
      content:"";
      position:absolute;
      width:220px;height:220px;
      right:-80px;bottom:-90px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(255,177,92,.18),transparent 65%);
      transition:.24s var(--ease);
    }
    .feature-card:hover::after{transform:scale(1.12)}
    .feature-card.large{min-height:410px;background:
      radial-gradient(circle at 78% 20%,rgba(43,231,208,.18),transparent 28%),
      linear-gradient(145deg,rgba(255,177,92,.12),rgba(255,255,255,.035));
    }
    .feature-stack{display:grid;gap:18px}
    .cover-icon{
      width:64px;height:64px;
      border-radius:22px;
      display:grid;
      place-items:center;
      color:#130d08;
      font-weight:900;
      font-size:24px;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      margin-bottom:22px;
    }
    .feature-card p{color:var(--muted);max-width:620px}
    .card-footer{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-top:22px;
      position:relative;
      z-index:1;
    }

    .status-panel{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:18px;
      align-items:stretch;
    }
    .ring-card,.status-list-card{
      border-radius:28px;
      padding:24px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.05);
      box-shadow:var(--shadow-soft);
    }
    .ring{
      width:184px;
      height:184px;
      border-radius:50%;
      margin:10px auto 22px;
      display:grid;
      place-items:center;
      background:conic-gradient(var(--brand-2) 0 72%, rgba(255,255,255,.08) 72% 100%);
      position:relative;
    }
    .ring::after{
      content:"";
      position:absolute;
      inset:16px;
      border-radius:50%;
      background:var(--bg-2);
      border:1px solid var(--line);
    }
    .ring strong{
      position:relative;
      z-index:1;
      font-size:34px;
      line-height:1;
    }
    .status-row{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:12px;
      align-items:center;
      padding:15px 0;
      border-bottom:1px solid var(--line);
    }
    .status-row:last-child{border-bottom:none}
    .status-icon{
      width:38px;height:38px;border-radius:15px;
      display:grid;place-items:center;
      background:rgba(43,231,208,.1);
      color:var(--brand-2);
      border:1px solid rgba(43,231,208,.18);
    }
    .status-row p{margin:0;color:var(--muted);font-size:14px}
    .status-row b{display:block;color:var(--text)}

    .update-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:16px;
    }
    .update-card{
      border-radius:24px;
      padding:20px;
      background:rgba(255,255,255,.045);
      border:1px solid var(--line);
      transition:.22s var(--ease);
    }
    .update-card:hover{transform:translateY(-3px);background:rgba(255,255,255,.07);border-color:rgba(255,177,92,.32)}
    .update-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:14px;
    }
    .update-card p{color:var(--muted);font-size:14px;margin-bottom:16px}
    .search-box{
      display:flex;
      gap:10px;
      padding:8px;
      border-radius:18px;
      background:rgba(255,255,255,.055);
      border:1px solid var(--line);
      max-width:560px;
    }
    .search-box input{
      flex:1;
      min-width:0;
      color:var(--text);
      background:transparent;
      border:0;
      outline:none;
      padding:10px 12px;
    }
    .search-box input::placeholder{color:var(--muted-2)}
    .search-box:focus-within{
      border-color:rgba(43,231,208,.45);
      box-shadow:0 0 0 4px rgba(43,231,208,.12);
    }
    .search-box.is-error{
      border-color:rgba(255,211,122,.48);
      box-shadow:0 0 0 4px rgba(255,211,122,.1);
    }
    .proof-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .proof-card{
      padding:20px;
      border-radius:22px;
      background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.03));
      border:1px solid var(--line);
    }
    .proof-card strong{
      display:block;
      font-size:28px;
      color:var(--brand);
      line-height:1.15;
      margin-bottom:6px;
    }
    .proof-card span{color:var(--muted);font-size:14px}

    .faq-wrap{
      display:grid;
      grid-template-columns:.75fr 1.25fr;
      gap:28px;
      align-items:start;
    }
    .faq-list{display:grid;gap:12px}
    details.faq-item{
      border:1px solid var(--line);
      border-radius:18px;
      background:rgba(255,255,255,.045);
      overflow:hidden;
      transition:.2s var(--ease);
    }
    details.faq-item[open]{
      border-color:rgba(43,231,208,.28);
      background:rgba(255,255,255,.065);
      box-shadow:var(--shadow-soft);
    }
    .faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:17px 18px;
      font-weight:850;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{
      content:"+";
      width:28px;height:28px;
      border-radius:10px;
      display:grid;
      place-items:center;
      background:rgba(255,255,255,.06);
      color:var(--brand);
      flex:0 0 auto;
    }
    .faq-item[open] summary::after{content:"−";background:rgba(43,231,208,.12);color:var(--brand-2)}
    .faq-item p{
      margin:0;
      padding:0 18px 18px;
      color:var(--muted);
      font-size:15px;
    }

    .cta-band{
      border-radius:34px;
      padding:38px;
      background:
        radial-gradient(circle at 18% 20%,rgba(255,177,92,.2),transparent 28%),
        radial-gradient(circle at 82% 60%,rgba(43,231,208,.16),transparent 30%),
        linear-gradient(135deg,rgba(255,255,255,.08),rgba(255,255,255,.03));
      border:1px solid var(--line-strong);
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:1fr auto;
      align-items:center;
      gap:24px;
    }
    .cta-band p{color:var(--muted);margin:0;max-width:720px}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap}

    .footer{
      margin-left:var(--sidebar);
      background:rgba(7,6,11,.82);
      border-top:1px solid var(--line);
      padding:42px 0 26px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.3fr .8fr .9fr;
      gap:30px;
    }
    .footer h3{font-size:17px;margin-bottom:12px}
    .footer p,.footer li,.footer a{color:var(--muted);font-size:14px}
    .footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
    .footer a:hover{color:var(--brand)}
    .copyright{
      margin-top:28px;
      padding-top:18px;
      border-top:1px solid var(--line);
      color:var(--muted-2);
      font-size:13px;
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }

    @media (max-width:1280px){
      :root{--sidebar:210px;--container:1080px}
      .hero-wrap{grid-template-columns:1fr}
      .hero{min-height:auto;padding-top:42px}
      .hero-visual{min-height:430px}
      .timeline{grid-template-columns:repeat(2,1fr)}
      .timeline::before{display:none}
    }
    @media (max-width:1024px){
      :root{--sidebar:82px}
      .sidebar{width:var(--sidebar);padding:18px 12px}
      .brand{justify-content:center;padding:8px}
      .brand-text,.nav-label,.nav-item span:not(.nav-icon),.side-status p{display:none}
      .nav-item{justify-content:center;padding:12px 8px}
      .side-status{padding:12px;display:grid;place-items:center}
      .status-dot{font-size:0}
      .status-dot::before{margin:0}
      .preview-layout,.status-panel,.faq-wrap{grid-template-columns:1fr}
      .proof-grid,.update-grid{grid-template-columns:repeat(2,1fr)}
      .footer{margin-left:var(--sidebar)}
    }
    @media (max-width:768px){
      :root{--sidebar:0}
      .sidebar{display:none}
      .mobile-topbar{display:block}
      .main,.footer{margin-left:0}
      .container{width:min(100% - 32px, var(--container))}
      .section{padding:52px 0}
      .hero{padding:28px 0 28px}
      .hero-copy{padding:24px;border-radius:26px}
      .hero-visual{min-height:auto;padding:18px;border-radius:26px}
      .section-head{align-items:flex-start;flex-direction:column}
      .strip-grid,.timeline,.update-grid,.proof-grid{grid-template-columns:1fr}
      .metric-grid{grid-template-columns:1fr}
      .cta-band{grid-template-columns:1fr;padding:26px;border-radius:26px}
      .footer-grid{grid-template-columns:1fr}
      .search-box{flex-direction:column}
      .search-box .btn{width:100%}
      .hero-actions .btn,.cta-actions .btn{width:100%}
    }
    @media (max-width:520px){
      h1{font-size:34px}
      h2{font-size:26px}
      .lead{font-size:16px}
      .hero-tags{gap:8px}
      .tag,.badge{font-size:12px}
      .feature-card,.ring-card,.status-list-card{border-radius:22px;padding:20px}
      .card-footer{align-items:flex-start;flex-direction:column}
      .btn{width:100%}
      .mobile-topbar .brand-text strong{font-size:13px}
      .mobile-topbar .brand-text span{display:none}
    }

/* roulang page: category1 */
:root{
      --bg:#100d17;
      --bg-2:#15111f;
      --bg-3:#1d1729;
      --panel:#211a2f;
      --panel-soft:#2a2238;
      --surface:#f7f3ed;
      --surface-2:#fffaf2;
      --text:#f6f0e8;
      --text-dark:#211c29;
      --muted:#b9adca;
      --muted-dark:#6b6376;
      --line:rgba(255,255,255,.12);
      --line-dark:rgba(31,24,42,.12);
      --amber:#f0a94a;
      --amber-2:#ffd28a;
      --cyan:#5eead4;
      --cyan-soft:rgba(94,234,212,.12);
      --danger:#ffb4a6;
      --ok:#8ff0c8;
      --shadow:0 22px 60px rgba(0,0,0,.32);
      --shadow-soft:0 14px 36px rgba(20,14,31,.18);
      --radius-lg:24px;
      --radius:18px;
      --radius-sm:13px;
      --side:232px;
      --container:1180px;
      --ease:all .24s ease;
      --font:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
    }

    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      min-height:100vh;
      font-family:var(--font);
      color:var(--text);
      line-height:1.75;
      background:
        radial-gradient(circle at 16% 12%, rgba(94,234,212,.14), transparent 28%),
        radial-gradient(circle at 82% 18%, rgba(240,169,74,.18), transparent 30%),
        linear-gradient(135deg, #0d0a12 0%, #15111f 42%, #100d17 100%);
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.28;
      background-image:
        linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
      background-size:44px 44px;
      mask-image:linear-gradient(to bottom, #000, transparent 88%);
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    input{border:0;outline:0}
    ::selection{background:rgba(240,169,74,.32);color:#fff}

    .container{
      width:min(var(--container), calc(100vw - 64px));
      margin:0 auto;
    }
    .site-shell{display:flex;min-height:100vh}
    .sidebar{
      width:var(--side);
      position:fixed;
      inset:0 auto 0 0;
      padding:22px 18px;
      background:rgba(17,13,25,.78);
      border-right:1px solid var(--line);
      backdrop-filter:blur(18px);
      z-index:50;
      display:flex;
      flex-direction:column;
      gap:24px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-height:52px;
      padding:8px 10px;
      border-radius:18px;
      color:#fff;
    }
    .brand-mark{
      width:40px;height:40px;border-radius:15px;
      display:grid;place-items:center;
      color:#101018;
      font-weight:900;
      background:
        radial-gradient(circle at 30% 20%, #fff2c8 0 10%, transparent 12%),
        linear-gradient(135deg, var(--amber), var(--cyan));
      box-shadow:0 10px 24px rgba(240,169,74,.22);
      flex:0 0 auto;
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.25}
    .brand-title{font-weight:800;font-size:15px;letter-spacing:.02em}
    .brand-sub{font-size:12px;color:var(--muted)}
    .side-nav{
      display:flex;
      flex-direction:column;
      gap:10px;
      margin-top:4px;
    }
    .nav-item{
      display:flex;
      align-items:center;
      gap:12px;
      padding:13px 14px;
      border-radius:16px;
      color:var(--muted);
      border:1px solid transparent;
      transition:var(--ease);
      font-weight:650;
    }
    .nav-icon{
      width:28px;height:28px;border-radius:11px;
      display:grid;place-items:center;
      background:rgba(255,255,255,.06);
      color:var(--amber-2);
      flex:0 0 auto;
    }
    .nav-item:hover{
      color:#fff;
      background:rgba(255,255,255,.06);
      border-color:rgba(255,255,255,.1);
      transform:translateX(2px);
    }
    .nav-item.active{
      color:#15111f;
      background:linear-gradient(135deg, var(--amber), var(--amber-2));
      box-shadow:0 14px 26px rgba(240,169,74,.2);
    }
    .nav-item.active .nav-icon{
      background:rgba(21,17,31,.12);
      color:#15111f;
    }
    .sidebar-status{
      margin-top:auto;
      padding:14px;
      border:1px solid var(--line);
      border-radius:18px;
      background:rgba(255,255,255,.045);
      color:var(--muted);
      font-size:13px;
    }
    .status-dot{
      display:inline-block;
      width:8px;height:8px;border-radius:50%;
      background:var(--cyan);
      box-shadow:0 0 0 5px rgba(94,234,212,.12);
      margin-right:8px;
    }

    .mobile-header{
      display:none;
      position:sticky;
      top:0;
      z-index:60;
      padding:12px 16px;
      background:rgba(17,13,25,.86);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(16px);
    }
    .mobile-bar{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
    }
    .menu-toggle{
      width:42px;height:42px;border-radius:14px;
      background:rgba(255,255,255,.07);
      color:#fff;
      border:1px solid var(--line);
      transition:var(--ease);
    }
    .menu-toggle:hover,.menu-toggle:focus{background:rgba(240,169,74,.14);outline:2px solid rgba(240,169,74,.32);outline-offset:2px}
    .mobile-drawer{
      display:none;
      padding-top:12px;
    }
    .mobile-header.open .mobile-drawer{display:block}
    .mobile-header .side-nav{
      flex-direction:row;
      overflow-x:auto;
      padding-bottom:4px;
    }
    .mobile-header .nav-item{white-space:nowrap}

    .main{
      width:calc(100% - var(--side));
      margin-left:var(--side);
      min-height:100vh;
    }
    .section{padding:74px 0}
    .section.tight{padding:48px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border:1px solid rgba(240,169,74,.3);
      border-radius:999px;
      color:var(--amber-2);
      background:rgba(240,169,74,.08);
      font-size:13px;
      font-weight:700;
      letter-spacing:.03em;
    }
    .section-title{
      margin-top:14px;
      font-size:clamp(28px, 4vw, 46px);
      line-height:1.18;
      letter-spacing:-.04em;
      font-weight:850;
    }
    .section-desc{
      margin-top:16px;
      max-width:760px;
      color:var(--muted);
      font-size:16px;
    }

    .page-head{
      padding:42px 0 34px;
      border-bottom:1px solid var(--line);
      background:
        radial-gradient(circle at 74% 18%, rgba(94,234,212,.14), transparent 24%),
        linear-gradient(180deg, rgba(255,255,255,.04), transparent);
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      color:var(--muted);
      font-size:14px;
      margin-bottom:24px;
    }
    .breadcrumb a{transition:var(--ease)}
    .breadcrumb a:hover{color:var(--amber-2)}
    .head-grid{
      display:grid;
      grid-template-columns:1.25fr .75fr;
      gap:28px;
      align-items:end;
    }
    h1{
      margin-top:14px;
      font-size:clamp(34px, 5.2vw, 64px);
      line-height:1.08;
      letter-spacing:-.055em;
      font-weight:900;
    }
    .lead{
      margin-top:20px;
      color:#d8cfe4;
      font-size:18px;
      max-width:780px;
    }
    .head-actions{
      display:flex;
      justify-content:flex-end;
      gap:12px;
      flex-wrap:wrap;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:12px 18px;
      border-radius:15px;
      border:1px solid transparent;
      font-weight:800;
      transition:var(--ease);
      user-select:none;
      white-space:nowrap;
    }
    .btn-primary{
      color:#14101b;
      background:linear-gradient(135deg,var(--amber),var(--amber-2));
      box-shadow:0 16px 34px rgba(240,169,74,.22);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 42px rgba(240,169,74,.3)}
    .btn-primary:active{transform:translateY(0) scale(.98)}
    .btn-secondary{
      color:#fff;
      background:rgba(255,255,255,.065);
      border-color:var(--line);
    }
    .btn-secondary:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2);transform:translateY(-2px)}
    .btn:focus-visible{
      outline:3px solid rgba(94,234,212,.38);
      outline-offset:3px;
    }
    .btn[disabled],.btn.disabled{
      opacity:.48;
      pointer-events:none;
      box-shadow:none;
    }

    .filter-panel{
      margin-top:30px;
      display:grid;
      grid-template-columns:1fr auto;
      gap:18px;
      align-items:center;
      padding:16px;
      border:1px solid var(--line);
      border-radius:22px;
      background:rgba(255,255,255,.045);
      box-shadow:var(--shadow-soft);
    }
    .search-form{
      display:flex;
      gap:10px;
      align-items:center;
      min-width:0;
    }
    .search-input{
      width:100%;
      min-height:48px;
      border-radius:15px;
      padding:0 16px;
      color:#fff;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.1);
      transition:var(--ease);
    }
    .search-input::placeholder{color:#9d92ad}
    .search-input:focus{
      border-color:rgba(94,234,212,.62);
      box-shadow:0 0 0 4px rgba(94,234,212,.13);
    }
    .search-input.error{
      border-color:rgba(255,180,166,.72);
      box-shadow:0 0 0 4px rgba(255,180,166,.12);
    }
    .tag-row{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:8px 12px;
      border-radius:999px;
      font-size:13px;
      font-weight:750;
      color:#d9d0e4;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.1);
      transition:var(--ease);
    }
    .tag:hover{color:#fff;border-color:rgba(240,169,74,.38);background:rgba(240,169,74,.1)}
    .tag.active{color:#14101b;background:var(--cyan);border-color:transparent}
    .tag .mini-dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.7}

    .surface-section{
      color:var(--text-dark);
      background:
        radial-gradient(circle at 16% 12%, rgba(240,169,74,.18), transparent 28%),
        linear-gradient(180deg, var(--surface), #efe8dc);
    }
    .surface-section .section-desc{color:var(--muted-dark)}
    .overview-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      margin-top:28px;
    }
    .metric-card{
      padding:22px;
      border-radius:20px;
      background:rgba(255,255,255,.72);
      border:1px solid var(--line-dark);
      box-shadow:0 12px 26px rgba(40,31,51,.08);
      transition:var(--ease);
    }
    .metric-card:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(40,31,51,.12)}
    .metric-num{font-size:30px;font-weight:900;letter-spacing:-.04em;color:#21192d}
    .metric-label{margin-top:4px;color:#766d82;font-size:14px}

    .content-layout{
      display:grid;
      grid-template-columns:250px 1fr;
      gap:24px;
      align-items:start;
    }
    .assist-box{
      position:sticky;
      top:24px;
      padding:20px;
      border:1px solid var(--line);
      border-radius:22px;
      background:rgba(255,255,255,.055);
      box-shadow:var(--shadow-soft);
    }
    .assist-box h2{
      font-size:18px;
      margin-bottom:12px;
    }
    .assist-list{
      list-style:none;
      display:grid;
      gap:12px;
      color:var(--muted);
      font-size:14px;
    }
    .assist-list li{
      display:flex;
      gap:10px;
      padding:10px;
      border-radius:14px;
      background:rgba(255,255,255,.045);
      border:1px solid rgba(255,255,255,.07);
    }
    .assist-list b{color:var(--amber-2)}
    .content-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:18px;
    }
    .item-card{
      overflow:hidden;
      min-height:320px;
      display:flex;
      flex-direction:column;
      border-radius:24px;
      border:1px solid var(--line);
      background:linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.045));
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
    }
    .item-card:hover{
      transform:translateY(-4px);
      border-color:rgba(240,169,74,.38);
      box-shadow:0 22px 48px rgba(0,0,0,.28);
    }
    .cover{
      position:relative;
      height:126px;
      overflow:hidden;
      background:
        radial-gradient(circle at 24% 26%, rgba(255,210,138,.55), transparent 22%),
        radial-gradient(circle at 72% 38%, rgba(94,234,212,.34), transparent 26%),
        linear-gradient(135deg, #30233f, #16111f);
    }
    .cover::after{
      content:"";
      position:absolute;
      inset:0;
      background-image:linear-gradient(120deg, transparent 0 35%, rgba(255,255,255,.14) 50%, transparent 65%);
      transform:translateX(-90%);
      transition:transform .6s ease;
    }
    .item-card:hover .cover::after{transform:translateX(90%)}
    .cover-badge{
      position:absolute;
      left:16px;top:16px;
      z-index:2;
      padding:6px 10px;
      border-radius:999px;
      color:#17111f;
      background:var(--amber-2);
      font-size:12px;
      font-weight:850;
    }
    .cover-code{
      position:absolute;
      right:16px;bottom:12px;
      font-size:42px;
      font-weight:900;
      color:rgba(255,255,255,.24);
      letter-spacing:-.06em;
    }
    .item-body{
      padding:20px;
      display:flex;
      flex-direction:column;
      gap:12px;
      flex:1;
    }
    .item-body h3{
      font-size:21px;
      line-height:1.35;
      letter-spacing:-.02em;
    }
    .item-body p{
      color:var(--muted);
      font-size:15px;
    }
    .meta-row{
      margin-top:auto;
      display:flex;
      justify-content:space-between;
      gap:12px;
      align-items:center;
      color:#9f94b2;
      font-size:13px;
      flex-wrap:wrap;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      padding:5px 9px;
      border-radius:999px;
      color:var(--cyan);
      background:var(--cyan-soft);
      border:1px solid rgba(94,234,212,.2);
      font-size:12px;
      font-weight:750;
    }
    .card-actions{
      display:flex;
      gap:10px;
      align-items:center;
      margin-top:2px;
    }
    .link-btn{
      color:var(--amber-2);
      font-weight:850;
      transition:var(--ease);
    }
    .link-btn:hover{color:#fff;letter-spacing:.02em}

    .steps{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      margin-top:30px;
      counter-reset:step;
    }
    .step-card{
      position:relative;
      padding:22px;
      border-radius:22px;
      background:rgba(255,255,255,.74);
      border:1px solid var(--line-dark);
      box-shadow:0 12px 28px rgba(40,31,51,.08);
    }
    .step-card::before{
      counter-increment:step;
      content:"0" counter(step);
      display:grid;
      place-items:center;
      width:38px;height:38px;
      border-radius:14px;
      margin-bottom:18px;
      color:#14101b;
      background:linear-gradient(135deg,var(--amber),var(--cyan));
      font-weight:900;
    }
    .step-card h3{font-size:18px;margin-bottom:8px}
    .step-card p{color:var(--muted-dark);font-size:14px}

    .progress-panel{
      border-radius:28px;
      padding:28px;
      border:1px solid var(--line);
      background:
        radial-gradient(circle at 90% 10%, rgba(240,169,74,.16), transparent 26%),
        linear-gradient(135deg, rgba(255,255,255,.075), rgba(255,255,255,.035));
      box-shadow:var(--shadow);
    }
    .progress-grid{
      margin-top:24px;
      display:grid;
      grid-template-columns:1fr 1fr 1fr;
      gap:16px;
    }
    .progress-card{
      padding:18px;
      border-radius:18px;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(255,255,255,.08);
    }
    .progress-card h3{font-size:17px;margin-bottom:12px}
    .bar{
      height:9px;
      border-radius:999px;
      background:rgba(255,255,255,.08);
      overflow:hidden;
      margin:12px 0;
    }
    .bar span{
      display:block;
      height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg,var(--cyan),var(--amber));
    }
    .progress-card p{color:var(--muted);font-size:14px}

    .faq-wrap{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:32px;
      align-items:start;
    }
    .faq-list{display:grid;gap:12px}
    details{
      border-radius:18px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.055);
      overflow:hidden;
      transition:var(--ease);
    }
    details[open]{border-color:rgba(240,169,74,.3);background:rgba(255,255,255,.075)}
    summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      font-weight:800;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
    }
    summary::-webkit-details-marker{display:none}
    summary::after{
      content:"+";
      width:28px;height:28px;
      border-radius:10px;
      display:grid;place-items:center;
      color:#15111f;
      background:var(--amber-2);
      flex:0 0 auto;
      transition:var(--ease);
    }
    details[open] summary::after{content:"−";transform:rotate(180deg)}
    details p{
      padding:0 20px 20px;
      color:var(--muted);
      font-size:15px;
    }

    .cta{
      position:relative;
      overflow:hidden;
      border-radius:32px;
      padding:46px;
      border:1px solid rgba(255,255,255,.14);
      background:
        radial-gradient(circle at 20% 20%, rgba(94,234,212,.18), transparent 28%),
        radial-gradient(circle at 86% 36%, rgba(240,169,74,.24), transparent 32%),
        linear-gradient(135deg, #241a31, #14101d);
      box-shadow:var(--shadow);
    }
    .cta::before{
      content:"";
      position:absolute;
      right:-80px;top:-80px;
      width:220px;height:220px;
      border-radius:50%;
      border:38px solid rgba(255,255,255,.04);
    }
    .cta-content{position:relative;z-index:1;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
    .cta h2{font-size:clamp(26px,4vw,42px);line-height:1.18;letter-spacing:-.04em}
    .cta p{margin-top:12px;color:var(--muted);max-width:700px}

    .empty-state{
      margin-top:18px;
      padding:22px;
      display:flex;
      align-items:center;
      gap:16px;
      border-radius:20px;
      border:1px dashed rgba(255,255,255,.18);
      color:var(--muted);
      background:rgba(255,255,255,.035);
    }
    .empty-icon{
      width:46px;height:46px;border-radius:16px;
      display:grid;place-items:center;
      background:rgba(94,234,212,.1);
      color:var(--cyan);
      font-size:22px;
      flex:0 0 auto;
    }
    .error-tip{
      display:none;
      margin-top:8px;
      color:var(--danger);
      font-size:13px;
    }
    .search-input.error + .error-tip{display:block}

    .footer{
      padding:56px 0 30px;
      background:rgba(10,8,14,.74);
      border-top:1px solid var(--line);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr 1fr;
      gap:28px;
    }
    .footer h3{
      font-size:17px;
      margin-bottom:12px;
      color:#fff;
    }
    .footer p,.footer li{
      color:var(--muted);
      font-size:14px;
    }
    .footer ul{list-style:none;display:grid;gap:8px}
    .footer a{transition:var(--ease)}
    .footer a:hover{color:var(--amber-2)}
    .copyright{
      margin-top:30px;
      padding-top:18px;
      border-top:1px solid var(--line);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      color:#8e839d;
      font-size:13px;
    }

    @media (max-width:1280px){
      :root{--side:208px;--container:1040px}
      .overview-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:1024px){
      :root{--side:86px}
      .sidebar{align-items:center;padding:18px 12px}
      .brand{padding:8px}
      .brand-text,.nav-item span:not(.nav-icon),.sidebar-status{display:none}
      .nav-item{justify-content:center;padding:13px}
      .content-layout{grid-template-columns:1fr}
      .assist-box{position:relative;top:auto}
      .assist-list{grid-template-columns:repeat(3,1fr)}
      .head-grid,.faq-wrap,.cta-content{grid-template-columns:1fr}
      .head-actions{justify-content:flex-start}
      .steps{grid-template-columns:repeat(2,1fr)}
      .progress-grid{grid-template-columns:1fr}
    }
    @media (max-width:768px){
      :root{--side:0}
      .sidebar{display:none}
      .mobile-header{display:block}
      .main{width:100%;margin-left:0}
      .container{width:min(100% - 32px, var(--container))}
      .page-head{padding:28px 0}
      .section{padding:52px 0}
      .filter-panel{grid-template-columns:1fr}
      .search-form{flex-direction:column;align-items:stretch}
      .content-grid{grid-template-columns:1fr}
      .assist-list{grid-template-columns:1fr}
      .overview-grid{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr}
      .cta{padding:32px 22px}
      .btn{width:100%}
      .head-actions,.card-actions{width:100%}
      .card-actions .btn{width:auto}
    }
    @media (max-width:520px){
      h1{font-size:34px}
      .lead{font-size:16px}
      .section-title{font-size:28px}
      .overview-grid,.steps{grid-template-columns:1fr}
      .filter-panel{padding:12px}
      .item-card{min-height:auto}
      .copyright{flex-direction:column}
      .mobile-header .nav-item{padding:11px 12px}
      .empty-state{align-items:flex-start}
    }