/* roulang page: index */
:root{
      --bg:#f7f8fc;
      --surface:#ffffff;
      --surface-2:#f1f4fb;
      --ink:#121826;
      --muted:#647089;
      --muted-2:#8892a8;
      --line:#e5e9f2;
      --primary:#5b5cf6;
      --primary-2:#7c3aed;
      --primary-soft:#eef0ff;
      --accent:#10b981;
      --accent-soft:#e8fbf3;
      --warning:#f59e0b;
      --danger:#ef4444;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:30px;
      --shadow-sm:0 10px 24px rgba(18,24,38,.07);
      --shadow:0 20px 60px rgba(18,24,38,.11);
      --shadow-hover:0 26px 78px rgba(91,92,246,.18);
      --container:1180px;
      --nav-h:76px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 6% 2%, rgba(91,92,246,.14), transparent 30%),
        radial-gradient(circle at 92% 6%, rgba(16,185,129,.13), transparent 28%),
        linear-gradient(180deg,#fbfcff 0%,var(--bg) 38%,#ffffff 100%);
      line-height:1.75;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(91,92,246,.18);color:var(--ink)}
    .site-container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .skip-link{
      position:absolute;left:16px;top:-60px;z-index:80;
      padding:10px 14px;border-radius:12px;background:#111827;color:#fff;
      transition:top .2s ease;
    }
    .skip-link:focus{top:16px;outline:3px solid rgba(91,92,246,.35)}
    .site-header{
      position:sticky;top:0;z-index:60;
      backdrop-filter:saturate(160%) blur(18px);
      background:rgba(255,255,255,.82);
      border-bottom:1px solid rgba(229,233,242,.82);
    }
    .nav-shell{
      min-height:var(--nav-h);
      display:flex;align-items:center;justify-content:space-between;gap:18px;
    }
    .brand{
      display:flex;align-items:center;gap:12px;min-width:0;
      font-weight:900;letter-spacing:-.03em;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;color:#fff;font-weight:900;
      background:linear-gradient(135deg,var(--primary),var(--primary-2));
      box-shadow:0 14px 35px rgba(91,92,246,.25);
      flex:0 0 auto;
    }
    .brand-text{
      max-width:320px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
      font-size:17px;
    }
    .desktop-nav{display:flex;align-items:center;gap:8px}
    .nav-link{
      padding:10px 14px;border-radius:999px;font-weight:800;font-size:14px;
      color:var(--muted);transition:background .2s ease,color .2s ease,transform .2s ease;
    }
    .nav-link:hover,.nav-link.active{background:var(--primary-soft);color:var(--primary)}
    .nav-link:active{transform:translateY(1px)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .nav-search{
      width:230px;height:42px;border:1px solid var(--line);border-radius:999px;
      display:flex;align-items:center;gap:8px;padding:0 14px;background:rgba(255,255,255,.78);
      color:var(--muted);transition:border .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .nav-search input{
      width:100%;border:0;outline:0;background:transparent;color:var(--ink);font-size:14px;
    }
    .nav-search:focus-within{border-color:rgba(91,92,246,.55);box-shadow:0 0 0 4px rgba(91,92,246,.12);background:#fff}
    .mega-wrap{position:relative}
    .mega-trigger{
      height:42px;padding:0 14px;border:1px solid var(--line);border-radius:999px;background:#fff;
      color:var(--ink);font-weight:800;font-size:14px;display:flex;align-items:center;gap:8px;
      transition:transform .2s ease,box-shadow .2s ease,border .2s ease;
    }
    .mega-trigger:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm);border-color:rgba(91,92,246,.25)}
    .mega-panel{
      position:absolute;right:0;top:calc(100% + 12px);width:360px;padding:16px;border-radius:22px;
      background:rgba(255,255,255,.96);border:1px solid rgba(229,233,242,.9);
      box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(8px);
      transition:opacity .2s ease,visibility .2s ease,transform .2s ease;
    }
    .mega-wrap:hover .mega-panel,.mega-wrap.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
    .mega-card{
      border:1px solid var(--line);border-radius:16px;padding:12px;background:linear-gradient(180deg,#fff,#f8f9ff);
      transition:transform .2s ease,border .2s ease;
    }
    .mega-card:hover{transform:translateY(-2px);border-color:rgba(91,92,246,.35)}
    .mega-card strong{display:block;font-size:13px;margin-bottom:4px}
    .mega-card span{display:block;font-size:12px;color:var(--muted);line-height:1.55}
    .mobile-toggle{
      display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:14px;background:#fff;
      align-items:center;justify-content:center;color:var(--ink);
    }
    .mobile-panel{
      display:none;border-top:1px solid var(--line);padding:12px 0 18px;
    }
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:0 18px;border-radius:999px;border:1px solid transparent;
      font-weight:900;letter-spacing:-.01em;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border .2s ease,color .2s ease;
      white-space:nowrap;
    }
    .btn-primary{
      color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-2));
      box-shadow:0 15px 34px rgba(91,92,246,.28);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 45px rgba(91,92,246,.34)}
    .btn-soft{background:var(--primary-soft);color:var(--primary);border-color:rgba(91,92,246,.14)}
    .btn-soft:hover{background:#e4e7ff;transform:translateY(-2px)}
    .btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
    .btn-ghost:hover{border-color:rgba(91,92,246,.35);box-shadow:var(--shadow-sm);transform:translateY(-2px)}
    .btn:focus-visible,.nav-link:focus-visible,.mega-trigger:focus-visible,.mobile-toggle:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
      outline:4px solid rgba(91,92,246,.16);outline-offset:3px;
    }
    .section{padding:74px 0}
    .section-tight{padding:48px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:6px 11px;border-radius:999px;
      background:rgba(91,92,246,.1);color:var(--primary);font-weight:900;font-size:13px;
      border:1px solid rgba(91,92,246,.13);
    }
    .section-head{max-width:820px;margin-bottom:28px}
    .section-title{
      margin:12px 0 10px;font-size:clamp(28px,3.5vw,44px);line-height:1.15;letter-spacing:-.05em;font-weight:950;
    }
    .section-desc{color:var(--muted);font-size:17px;max-width:780px}
    .card{
      background:rgba(255,255,255,.88);border:1px solid rgba(229,233,242,.86);border-radius:var(--radius);
      box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border .22s ease;background .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(91,92,246,.26)}
    .badge{
      display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;font-size:12px;font-weight:900;
      background:var(--surface-2);color:var(--muted);
    }
    .badge.green{background:var(--accent-soft);color:#047857}
    .badge.warn{background:#fff7e8;color:#b45309}
    .hero{
      padding:58px 0 38px;
    }
    .hero-board{
      border:1px solid rgba(229,233,242,.9);border-radius:34px;overflow:hidden;
      background:
        linear-gradient(135deg,rgba(255,255,255,.94),rgba(247,248,252,.9)),
        radial-gradient(circle at 16% 20%,rgba(91,92,246,.18),transparent 26%),
        radial-gradient(circle at 82% 0%,rgba(16,185,129,.15),transparent 32%);
      box-shadow:var(--shadow);
    }
    .hero-topline{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:16px 18px;border-bottom:1px solid rgba(229,233,242,.9);background:rgba(255,255,255,.62);
    }
    .status-pills{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
    .status-dot{width:8px;height:8px;border-radius:999px;background:var(--accent);box-shadow:0 0 0 5px rgba(16,185,129,.12)}
    .hero-content{padding:38px;display:grid;grid-template-columns:1.06fr .94fr;gap:30px;align-items:center}
    .hero h1{
      margin:14px 0 16px;font-size:clamp(34px,5vw,64px);line-height:1.04;letter-spacing:-.06em;font-weight:1000;
    }
    .hero-lead{font-size:18px;color:var(--muted);max-width:680px;line-height:1.85}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .metric{
      padding:14px;border-radius:18px;border:1px solid rgba(229,233,242,.88);background:rgba(255,255,255,.72)
    }
    .metric strong{display:block;font-size:24px;line-height:1;font-weight:1000;color:var(--ink)}
    .metric span{display:block;margin-top:7px;font-size:13px;color:var(--muted)}
    .icon-matrix{
      display:grid;grid-template-columns:repeat(4,1fr);gap:12px;
    }
    .icon-tile{
      min-height:106px;padding:14px;border-radius:22px;border:1px solid rgba(229,233,242,.9);
      background:rgba(255,255,255,.72);display:flex;flex-direction:column;justify-content:space-between;
      position:relative;overflow:hidden;
    }
    .icon-tile:after{
      content:"";position:absolute;inset:auto -24px -28px auto;width:76px;height:76px;border-radius:50%;
      background:rgba(91,92,246,.08);
    }
    .icon{width:38px;height:38px;border-radius:14px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-size:20px}
    .icon-tile strong{font-size:14px;line-height:1.35;z-index:1}
    .stage-bar{margin-top:14px;padding:14px;border-radius:20px;background:#111827;color:#fff}
    .stage-item{display:grid;grid-template-columns:96px 1fr 42px;gap:10px;align-items:center;margin:10px 0;font-size:13px}
    .track{height:8px;border-radius:999px;background:rgba(255,255,255,.16);overflow:hidden}
    .track i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),#a7f3d0)}
    .benefit-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:stretch}
    .benefit-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .benefit-card{padding:20px}
    .benefit-card .num{font-size:13px;font-weight:1000;color:var(--primary);margin-bottom:8px}
    .benefit-card h3{font-size:19px;font-weight:950;margin:0 0 8px}
    .benefit-card p{font-size:14px;color:var(--muted);line-height:1.75;margin:0}
    .invite-panel{padding:22px;background:linear-gradient(150deg,#111827,#25235e);color:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
    .invite-panel p{color:rgba(255,255,255,.72)}
    .progress{height:12px;border-radius:999px;background:rgba(255,255,255,.15);overflow:hidden}
    .progress span{display:block;height:100%;width:64%;border-radius:999px;background:linear-gradient(90deg,#34d399,#a7f3d0)}
    .rank-list{display:grid;gap:10px;margin-top:16px}
    .rank-item{
      display:flex;align-items:center;justify-content:space-between;gap:12px;
      padding:11px 12px;border-radius:15px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1)
    }
    .rank-item b{font-size:13px}
    .rank-item span{font-size:12px;color:rgba(255,255,255,.66)}
    .pricing-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:stretch}
    .price-card{padding:24px;position:relative;overflow:hidden}
    .price-card.featured{background:linear-gradient(180deg,#ffffff,#f2f0ff);border-color:rgba(91,92,246,.28);box-shadow:var(--shadow-hover)}
    .price{display:flex;align-items:flex-end;gap:6px;margin:18px 0}
    .price strong{font-size:42px;line-height:.95;font-weight:1000;letter-spacing:-.05em}
    .price span{color:var(--muted);font-size:14px;margin-bottom:5px}
    .check-list{display:grid;gap:10px;margin:18px 0 22px}
    .check-list li{list-style:none;display:flex;gap:9px;color:var(--muted);font-size:14px}
    .check-list li:before{content:"✓";color:var(--accent);font-weight:1000}
    .compare-note{
      margin-top:16px;padding:14px 16px;border-radius:16px;background:#fff7e8;color:#92400e;border:1px solid rgba(245,158,11,.22);
      font-size:14px;
    }
    .category-rail{
      display:flex;gap:12px;overflow-x:auto;padding:4px 2px 10px;scroll-snap-type:x mandatory;
    }
    .category-rail::-webkit-scrollbar{height:8px}
    .category-rail::-webkit-scrollbar-thumb{background:#d7dcef;border-radius:999px}
    .category-pill{
      flex:0 0 210px;scroll-snap-align:start;padding:16px;border-radius:20px;background:#fff;border:1px solid var(--line);
      transition:transform .2s ease,box-shadow .2s ease,border .2s ease;
    }
    .category-pill:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:rgba(91,92,246,.25)}
    .category-pill strong{display:block;font-size:16px;margin-bottom:6px}
    .category-pill span{font-size:13px;color:var(--muted);line-height:1.6}
    .news-layout{display:grid;grid-template-columns:minmax(0,1.35fr) .65fr;gap:18px}
    .news-list{padding:8px}
    .news-item{
      display:grid;grid-template-columns:110px 1fr auto;gap:16px;align-items:center;
      padding:18px;border-radius:18px;border-bottom:1px solid var(--line);
      transition:background .2s ease,transform .2s ease;
    }
    .news-item:last-child{border-bottom:0}
    .news-item:hover{background:#f8f9ff;transform:translateX(3px)}
    .news-item time{font-size:13px;color:var(--muted-2);font-weight:800}
    .news-item a{font-weight:950;font-size:17px;line-height:1.45}
    .news-item p{margin:5px 0 0;color:var(--muted);font-size:14px;line-height:1.65}
    .arrow{color:var(--primary);font-weight:1000}
    .recommend{padding:22px;background:linear-gradient(180deg,#111827,#1f2937);color:#fff}
    .recommend p{color:rgba(255,255,255,.72)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
    .tag-cloud a{
      padding:7px 10px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.12);
      color:rgba(255,255,255,.86);font-size:13px;transition:background .2s ease,transform .2s ease;
    }
    .tag-cloud a:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
    .review-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:18px}
    .score-card{padding:24px;background:linear-gradient(135deg,#ffffff,#eff2ff)}
    .score-num{font-size:58px;line-height:1;font-weight:1000;letter-spacing:-.07em}
    .stars{color:#f59e0b;letter-spacing:2px;margin:10px 0}
    .review-list{display:grid;gap:12px}
    .review-item{padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .review-item strong{display:block;margin-bottom:6px}
    .review-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}
    .open-panel{
      display:grid;grid-template-columns:.9fr 1.1fr;gap:20px;align-items:stretch;
      padding:24px;border-radius:30px;background:linear-gradient(135deg,#5b5cf6,#7c3aed);color:#fff;box-shadow:var(--shadow);
    }
    .open-panel .section-title{color:#fff}
    .open-panel p{color:rgba(255,255,255,.76)}
    .form-card{background:rgba(255,255,255,.96);color:var(--ink);border-radius:24px;padding:22px;border:1px solid rgba(255,255,255,.5)}
    .field-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .field{display:grid;gap:7px;margin-bottom:12px}
    .field label{font-size:13px;font-weight:900;color:var(--ink)}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:12px 13px;outline:0;color:var(--ink);
      transition:border .2s ease,box-shadow .2s ease;
    }
    .field textarea{min-height:92px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(91,92,246,.5);box-shadow:0 0 0 4px rgba(91,92,246,.1)}
    .form-tip{font-size:13px;color:var(--muted);margin-top:10px}
    .form-message{
      display:none;margin-top:12px;padding:12px;border-radius:14px;background:var(--accent-soft);color:#047857;font-weight:800;font-size:14px;
    }
    .security-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .security-card{padding:18px;text-align:left}
    .security-card .icon{margin-bottom:12px}
    .security-card h3{font-weight:950;margin:0 0 6px;font-size:17px}
    .security-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}
    .faq-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:20px;align-items:start}
    .faq-aside{position:sticky;top:96px;padding:22px;background:#fff;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
    .faq-list{display:grid;gap:12px}
    details.faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 8px 20px rgba(18,24,38,.04)}
    details.faq-item[open]{border-color:rgba(91,92,246,.28)}
    .faq-item summary{
      list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;
      padding:18px 20px;font-weight:950;cursor:pointer;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"＋";color:var(--primary);font-weight:1000}
    .faq-item[open] summary:after{content:"—"}
    .faq-item p{padding:0 20px 20px;margin:0;color:var(--muted);font-size:15px;line-height:1.85}
    .site-footer{
      padding:46px 0 26px;background:#0f172a;color:#dbe4ff;
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .8fr;gap:26px;align-items:start}
    .footer-brand{display:flex;align-items:center;gap:12px;font-weight:950;font-size:18px;margin-bottom:12px}
    .footer-mark{width:40px;height:40px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
    .footer-grid p,.footer-grid a,.copyright{color:rgba(219,228,255,.72);font-size:14px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{transition:color .2s ease,transform .2s ease}
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .footer-bottom{
      margin-top:30px;padding-top:20px;border-top:1px solid rgba(219,228,255,.12);
      display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    }
    .floating-cta{
      position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:55;
      display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:999px;background:rgba(17,24,39,.9);
      color:#fff;box-shadow:0 18px 48px rgba(0,0,0,.25);backdrop-filter:blur(14px);
    }
    .floating-cta span{font-size:13px;color:rgba(255,255,255,.8)}
    .floating-cta .btn{min-height:38px;padding:0 14px}
    @media (max-width:1024px){
      .nav-search{display:none}
      .hero-content,.benefit-grid,.news-layout,.review-grid,.open-panel,.faq-layout{grid-template-columns:1fr}
      .pricing-wrap{grid-template-columns:1fr 1fr}
      .security-grid{grid-template-columns:1fr 1fr}
      .faq-aside{position:static}
      .hero-content{padding:30px}
    }
    @media (max-width:768px){
      :root{--nav-h:68px}
      .site-container{width:min(100% - 28px,var(--container))}
      .desktop-nav,.nav-actions{display:none}
      .mobile-toggle{display:flex}
      .mobile-panel.open{display:block}
      .mobile-panel .nav-link{display:flex;margin:6px 0;justify-content:center}
      .mobile-panel .btn{width:100%;margin-top:8px}
      .section{padding:54px 0}
      .hero{padding:28px 0 28px}
      .hero-topline{align-items:flex-start;flex-direction:column}
      .hero-content{padding:24px;gap:24px}
      .icon-matrix{grid-template-columns:repeat(2,1fr)}
      .metric-row,.benefit-list,.pricing-wrap,.field-grid{grid-template-columns:1fr}
      .news-item{grid-template-columns:1fr;gap:8px}
      .footer-grid{grid-template-columns:1fr}
      .floating-cta{width:calc(100% - 24px);justify-content:space-between}
      .floating-cta span{display:none}
    }
    @media (max-width:520px){
      .brand-text{max-width:230px;font-size:15px}
      .brand-mark{width:38px;height:38px;border-radius:13px}
      .hero h1{font-size:34px}
      .hero-actions .btn{width:100%}
      .icon-tile{min-height:96px}
      .stage-item{grid-template-columns:76px 1fr 34px;font-size:12px}
      .security-grid{grid-template-columns:1fr}
      .open-panel{padding:16px;border-radius:24px}
      .form-card{padding:18px}
      .footer-bottom{display:block}
      .copyright{margin-top:10px}
    }