/* roulang page: index */
:root{
      --primary:#1f66d1;
      --primary-700:#164fa8;
      --primary-50:#edf5ff;
      --secondary:#11a7c7;
      --accent:#ffb020;
      --success:#1aa36f;
      --danger:#e45858;
      --bg:#f6f9fe;
      --surface:#ffffff;
      --surface-soft:#f9fbff;
      --text:#172033;
      --muted:#66758f;
      --light:#8a98ad;
      --border:#dfe8f5;
      --border-strong:#c7d7ec;
      --shadow-sm:0 8px 24px rgba(24,56,102,.08);
      --shadow-md:0 16px 44px rgba(31,102,209,.13);
      --shadow-lg:0 24px 70px rgba(18,58,117,.16);
      --radius-sm:12px;
      --radius-md:18px;
      --radius-lg:28px;
      --radius-xl:36px;
      --container:1180px;
      --nav-height:76px;
      --ease:all .22s ease;
    }

    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      background:
        radial-gradient(circle at top left, rgba(31,102,209,.12), transparent 32rem),
        linear-gradient(180deg,#fbfdff 0%,var(--bg) 44%,#ffffff 100%);
      color:var(--text);
      line-height:1.72;
      font-size:16px;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{border:0;background:none;cursor:pointer}
    ::selection{background:rgba(31,102,209,.16);color:var(--primary-700)}
    :focus-visible{outline:3px solid rgba(31,102,209,.32);outline-offset:3px;border-radius:10px}

    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .section{padding:86px 0}
    .section-tight{padding:58px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      background:var(--primary-50);color:var(--primary-700);
      font-weight:800;font-size:13px;letter-spacing:.02em;
      border:1px solid rgba(31,102,209,.12)
    }
    .eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--secondary);box-shadow:0 0 0 5px rgba(17,167,199,.12)}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:30px}
    .section-title{font-size:clamp(28px,3.1vw,44px);line-height:1.16;letter-spacing:-.04em;margin-top:14px}
    .section-desc{max-width:640px;color:var(--muted);font-size:17px}
    .muted{color:var(--muted)}
    .strong{font-weight:900;color:var(--text)}
    .highlight{color:var(--primary-700)}

    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.86);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(223,232,245,.86);
      box-shadow:0 10px 30px rgba(23,32,51,.04);
    }
    .nav{
      height:var(--nav-height);
      display:flex;align-items:center;justify-content:space-between;gap:22px;
    }
    .brand{
      display:flex;align-items:center;gap:12px;
      font-weight:950;letter-spacing:-.04em;font-size:19px;
      min-width:0;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;color:white;font-weight:950;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 12px 28px rgba(31,102,209,.24);
      flex:0 0 auto;
    }
    .brand-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-center{display:flex;align-items:center;gap:10px;margin-left:auto}
    .nav-link{
      padding:10px 16px;border-radius:999px;color:#344159;
      font-weight:800;font-size:15px;transition:var(--ease);
    }
    .nav-link:hover{background:var(--primary-50);color:var(--primary-700)}
    .nav-link.active{background:#e4efff;color:var(--primary-700)}
    .nav-actions{display:flex;align-items:center;gap:12px}
    .nav-cta{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:999px;
      color:white;background:linear-gradient(135deg,var(--primary),var(--primary-700));
      font-weight:900;box-shadow:0 12px 28px rgba(31,102,209,.22);
      transition:var(--ease);
      white-space:nowrap;
    }
    .nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(31,102,209,.28)}
    .menu-btn{
      display:none;width:44px;height:44px;border-radius:14px;
      background:var(--primary-50);color:var(--primary-700);
      align-items:center;justify-content:center;font-weight:950;
    }

    .hero{padding:42px 0 72px}
    .hero-shell{
      position:relative;overflow:hidden;border-radius:var(--radius-xl);
      background:
        linear-gradient(135deg,rgba(255,255,255,.96),rgba(238,246,255,.92)),
        radial-gradient(circle at 15% 10%,rgba(17,167,199,.18),transparent 30rem);
      border:1px solid rgba(199,215,236,.95);
      box-shadow:var(--shadow-lg);
      padding:48px;
    }
    .hero-shell:before{
      content:"";position:absolute;inset:auto -110px -140px auto;width:360px;height:360px;
      border-radius:50%;background:rgba(31,102,209,.12);filter:blur(8px);
    }
    .hero-topline{
      display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:24px;position:relative;z-index:1;
    }
    .brand-pill{
      display:inline-flex;align-items:center;gap:10px;
      padding:10px 14px;border:1px solid rgba(31,102,209,.16);
      background:rgba(255,255,255,.78);border-radius:999px;
      font-weight:900;color:var(--primary-700);
      box-shadow:var(--shadow-sm);
    }
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:34px;align-items:stretch;position:relative;z-index:1;
    }
    .hero h1{
      font-size:clamp(38px,5.2vw,68px);
      line-height:1.06;letter-spacing:-.06em;
      max-width:860px;
    }
    .hero-lead{
      margin-top:22px;
      color:#42516b;
      font-size:clamp(17px,1.7vw,21px);
      max-width:820px;
    }
    .hero-points{
      display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:26px;max-width:900px;
    }
    .point{
      display:flex;align-items:flex-start;gap:10px;
      padding:14px;border-radius:18px;background:rgba(255,255,255,.72);
      border:1px solid rgba(223,232,245,.88);
      color:#35445f;font-weight:800;
    }
    .check{
      width:22px;height:22px;border-radius:50%;flex:0 0 auto;
      background:rgba(26,163,111,.12);color:var(--success);
      display:grid;place-items:center;font-size:13px;font-weight:950;
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      min-height:48px;padding:13px 20px;border-radius:999px;
      font-weight:950;transition:var(--ease);
      border:1px solid transparent;
      white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-700));color:white;box-shadow:0 16px 34px rgba(31,102,209,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 42px rgba(31,102,209,.31)}
    .btn-secondary{background:white;color:var(--primary-700);border-color:rgba(31,102,209,.18);box-shadow:var(--shadow-sm)}
    .btn-secondary:hover{background:var(--primary-50);transform:translateY(-2px)}
    .btn-ghost{background:rgba(31,102,209,.08);color:var(--primary-700);border-color:rgba(31,102,209,.1)}
    .btn-ghost:hover{background:rgba(31,102,209,.13)}
    .trust-row{
      margin-top:28px;display:flex;flex-wrap:wrap;gap:10px;
      color:#53637e;font-size:14px;font-weight:800;
    }
    .trust-item{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 11px;border-radius:999px;background:rgba(255,255,255,.68);
      border:1px solid rgba(223,232,245,.78);
    }

    .hero-dashboard{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;
      align-content:start;
    }
    .metric-card{
      background:rgba(255,255,255,.86);border:1px solid rgba(223,232,245,.88);
      border-radius:24px;padding:20px;box-shadow:var(--shadow-sm);
      min-height:136px;transition:var(--ease);
    }
    .metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
    .metric-card.wide{grid-column:1/-1}
    .metric-number{font-size:34px;line-height:1;font-weight:950;color:var(--primary-700);letter-spacing:-.04em}
    .metric-label{font-weight:900;margin-top:9px}
    .metric-note{color:var(--muted);font-size:14px;margin-top:4px}
    .mini-progress{height:9px;background:#e8f0fb;border-radius:99px;overflow:hidden;margin-top:14px}
    .mini-progress span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--secondary),var(--primary));width:74%}

    .play-wrap{display:grid;grid-template-columns:.82fr 1.18fr;gap:26px;align-items:stretch}
    .play-panel{
      border-radius:var(--radius-lg);background:linear-gradient(160deg,#fff,#eef6ff);
      border:1px solid var(--border);padding:30px;box-shadow:var(--shadow-sm);
    }
    .play-panel h3{font-size:26px;line-height:1.2;letter-spacing:-.03em;margin-bottom:12px}
    .play-panel p{color:var(--muted)}
    .play-list{display:grid;gap:16px}
    .step-card{
      display:grid;grid-template-columns:auto 1fr;gap:16px;
      background:var(--surface);border:1px solid var(--border);
      border-radius:24px;padding:22px;box-shadow:var(--shadow-sm);
      transition:var(--ease);
    }
    .step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(31,102,209,.22)}
    .step-num{
      width:44px;height:44px;border-radius:16px;display:grid;place-items:center;
      background:var(--primary-50);color:var(--primary-700);font-weight:950;
    }
    .step-card h3{font-size:20px;margin-bottom:5px}
    .step-card p{color:var(--muted);font-size:15px}

    .groups{
      display:grid;grid-template-columns:1.1fr .9fr;gap:26px;
    }
    .group-cards{display:grid;gap:18px}
    .group-card{
      background:var(--surface);border:1px solid var(--border);
      border-radius:28px;padding:24px;box-shadow:var(--shadow-md);
    }
    .group-head{display:flex;justify-content:space-between;gap:14px;margin-bottom:16px}
    .tag{
      display:inline-flex;align-items:center;gap:6px;
      padding:6px 10px;border-radius:999px;
      background:#eef6ff;color:var(--primary-700);
      border:1px solid rgba(31,102,209,.12);
      font-size:13px;font-weight:900;
    }
    .tag.hot{background:#fff7e6;color:#9a6300;border-color:#ffe0a3}
    .group-card h3{font-size:23px;letter-spacing:-.03em;margin-bottom:8px}
    .group-card p{color:var(--muted);font-size:15px}
    .progress-line{height:12px;background:#edf3fb;border-radius:99px;overflow:hidden;margin:18px 0 10px}
    .progress-line span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--primary))}
    .group-meta{display:flex;flex-wrap:wrap;gap:10px;color:#5b6a82;font-weight:800;font-size:14px;margin-bottom:18px}
    .tier-box{
      background:#f8fbff;border:1px dashed var(--border-strong);
      border-radius:24px;padding:24px;
    }
    .tier-grid{display:grid;gap:14px;margin-top:18px}
    .tier{
      display:flex;align-items:center;justify-content:space-between;gap:14px;
      padding:16px;border-radius:18px;background:white;border:1px solid var(--border);
    }
    .tier strong{display:block}
    .tier small{color:var(--muted);font-weight:700}
    .supporters{
      margin-top:18px;display:flex;flex-wrap:wrap;gap:10px;
    }
    .avatar{
      width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
      background:linear-gradient(135deg,#e8f2ff,#fff);border:1px solid var(--border);
      color:var(--primary-700);font-weight:950;box-shadow:0 6px 14px rgba(31,102,209,.08)
    }

    .compare-shell{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;
    }
    .compare-card{
      border-radius:28px;padding:28px;border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-sm);
    }
    .compare-card.good{border-color:rgba(26,163,111,.26);background:linear-gradient(180deg,#ffffff,#f4fffb)}
    .compare-card.warn{border-color:rgba(228,88,88,.22);background:linear-gradient(180deg,#ffffff,#fff8f8)}
    .compare-card h3{font-size:24px;margin-bottom:16px}
    .compare-list{display:grid;gap:12px;list-style:none}
    .compare-list li{display:flex;gap:10px;color:#4a5871}
    .icon-ok,.icon-no{
      width:24px;height:24px;border-radius:50%;display:grid;place-items:center;flex:0 0 auto;font-size:13px;font-weight:950
    }
    .icon-ok{background:rgba(26,163,111,.13);color:var(--success)}
    .icon-no{background:rgba(228,88,88,.12);color:var(--danger)}

    .news-layout{display:grid;grid-template-columns:1fr 360px;gap:28px;align-items:start}
    .news-list{
      background:var(--surface);border:1px solid var(--border);
      border-radius:28px;box-shadow:var(--shadow-sm);overflow:hidden;
    }
    .news-item{
      display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;
      padding:20px 22px;border-bottom:1px solid var(--border);
      transition:var(--ease);
    }
    .news-item:last-child{border-bottom:0}
    .news-item:hover{background:var(--primary-50)}
    .news-date{
      min-width:72px;text-align:center;padding:8px 10px;border-radius:14px;
      background:#f4f8ff;color:var(--primary-700);font-weight:950;font-size:13px;
    }
    .news-item h3{font-size:18px;line-height:1.35}
    .news-item p{font-size:14px;color:var(--muted);margin-top:4px}
    .arrow{color:var(--primary-700);font-weight:950}
    .recommend-card{
      position:sticky;top:98px;background:linear-gradient(160deg,#ffffff,#edf6ff);
      border:1px solid var(--border);border-radius:28px;padding:26px;box-shadow:var(--shadow-md);
    }
    .recommend-card h3{font-size:24px;line-height:1.25;margin-bottom:10px}
    .recommend-card p{color:var(--muted);margin-bottom:18px}
    .mini-list{list-style:none;display:grid;gap:10px;margin:18px 0}
    .mini-list li{
      display:flex;gap:10px;align-items:flex-start;
      padding:12px;border-radius:16px;background:rgba(255,255,255,.78);border:1px solid rgba(223,232,245,.8)
    }

    .catalog-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
    .catalog-card{
      background:var(--surface);border:1px solid var(--border);border-radius:24px;
      padding:22px;box-shadow:var(--shadow-sm);transition:var(--ease);
    }
    .catalog-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(31,102,209,.2)}
    .catalog-icon{
      width:46px;height:46px;border-radius:16px;display:grid;place-items:center;
      background:var(--primary-50);color:var(--primary-700);font-size:22px;margin-bottom:15px;
    }
    .catalog-card h3{font-size:20px;margin-bottom:8px}
    .catalog-card p{color:var(--muted);font-size:15px;margin-bottom:16px}
    .catalog-meta{display:flex;justify-content:space-between;align-items:center;color:#5c6c85;font-size:14px;font-weight:850}

    .security-band{
      border-radius:var(--radius-xl);background:#10213f;color:white;overflow:hidden;
      box-shadow:var(--shadow-lg);position:relative;
    }
    .security-band:before{
      content:"";position:absolute;inset:-120px auto auto -120px;width:300px;height:300px;border-radius:50%;
      background:rgba(17,167,199,.18);
    }
    .security-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;padding:42px;position:relative;z-index:1}
    .security-band .section-title{color:white}
    .security-band .section-desc{color:#c6d4ec}
    .shield-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .shield{
      background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
      border-radius:22px;padding:20px;transition:var(--ease);
    }
    .shield:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}
    .shield strong{display:block;font-size:18px;margin-bottom:6px}
    .shield p{color:#c6d4ec;font-size:14px}

    .faq-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:28px;align-items:start}
    .quote-card{
      border-radius:28px;background:linear-gradient(160deg,#ffffff,#f0f7ff);
      border:1px solid var(--border);padding:28px;box-shadow:var(--shadow-sm);
    }
    .quote-card blockquote{
      font-size:24px;line-height:1.35;font-weight:950;letter-spacing:-.03em;
    }
    .quote-card p{color:var(--muted);margin-top:14px}
    .faq-list{display:grid;gap:14px}
    .faq-item{
      background:var(--surface);border:1px solid var(--border);border-radius:22px;
      padding:20px 22px;box-shadow:var(--shadow-sm);
    }
    .faq-item h3{font-size:19px;margin-bottom:8px}
    .faq-item p{color:var(--muted)}

    .start-section{padding:84px 0 96px}
    .start-card{
      display:grid;grid-template-columns:1fr .92fr;gap:34px;
      border-radius:var(--radius-xl);
      background:
        linear-gradient(135deg,rgba(31,102,209,.98),rgba(17,167,199,.92)),
        radial-gradient(circle at right top,rgba(255,255,255,.22),transparent 24rem);
      color:white;padding:44px;box-shadow:var(--shadow-lg);overflow:hidden;
    }
    .start-card h2{font-size:clamp(30px,3.4vw,48px);line-height:1.13;letter-spacing:-.05em;margin-top:14px}
    .start-card p{color:#e5f0ff;margin-top:16px;font-size:17px}
    .timeline{display:grid;gap:14px;margin-top:26px}
    .timeline-item{
      display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;
      padding:14px;border-radius:18px;background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.15)
    }
    .timeline-dot{width:28px;height:28px;border-radius:50%;background:white;color:var(--primary-700);display:grid;place-items:center;font-weight:950}
    .lead-form{
      background:white;color:var(--text);border-radius:28px;padding:26px;
      box-shadow:0 22px 48px rgba(4,24,52,.18);
    }
    .form-title{font-size:24px;font-weight:950;margin-bottom:6px}
    .form-note{color:var(--muted)!important;margin:0 0 18px!important;font-size:14px!important}
    .field{display:grid;gap:7px;margin-bottom:14px}
    .field label{font-weight:900;font-size:14px;color:#344159}
    .field input,.field textarea,.field select{
      width:100%;border:1px solid var(--border);border-radius:16px;
      padding:13px 14px;background:#fbfdff;color:var(--text);
      transition:var(--ease);
    }
    .field textarea{min-height:96px;resize:vertical}
    .field input:focus,.field textarea:focus,.field select:focus{
      border-color:rgba(31,102,209,.55);
      box-shadow:0 0 0 4px rgba(31,102,209,.1);
      outline:0;background:white;
    }
    .form-status{
      display:none;margin-top:12px;padding:12px 14px;border-radius:16px;
      background:#eefbf6;color:#0f7a52;border:1px solid rgba(26,163,111,.18);font-weight:850;
    }
    .form-status.show{display:block}

    .footer{
      background:#0d1930;color:#c7d4ea;padding:48px 0 28px;
    }
    .footer-grid{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:start;border-bottom:1px solid rgba(255,255,255,.1);padding-bottom:26px}
    .footer-brand{display:flex;align-items:center;gap:12px;color:white;font-weight:950;font-size:20px;margin-bottom:12px}
    .footer p{max-width:760px;color:#aebdd4}
    .footer-links{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .footer-links a{
      padding:9px 12px;border-radius:999px;background:rgba(255,255,255,.06);
      color:#d8e4f6;transition:var(--ease);font-weight:800;font-size:14px
    }
    .footer-links a:hover{background:rgba(255,255,255,.12);color:white}
    .copyright{
      display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
      padding-top:22px;color:#93a4bf;font-size:14px;
    }

    @media (max-width:1024px){
      .hero-grid,.play-wrap,.groups,.news-layout,.security-inner,.faq-grid,.start-card{grid-template-columns:1fr}
      .hero-dashboard{grid-template-columns:repeat(4,minmax(0,1fr))}
      .metric-card.wide{grid-column:auto}
      .catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .recommend-card{position:static}
      .section{padding:70px 0}
    }
    @media (max-width:768px){
      :root{--nav-height:68px}
      .container{width:min(100% - 28px,var(--container))}
      .menu-btn{display:flex}
      .nav-center{
        position:absolute;left:14px;right:14px;top:calc(var(--nav-height) + 8px);
        display:none;flex-direction:column;align-items:stretch;
        background:white;border:1px solid var(--border);border-radius:22px;
        padding:12px;box-shadow:var(--shadow-lg);
      }
      .nav-center.open{display:flex}
      .nav-link{text-align:center}
      .nav-actions .nav-cta{display:none}
      .brand-text{max-width:66vw}
      .hero-shell{padding:30px 20px;border-radius:28px}
      .hero-points{grid-template-columns:1fr}
      .hero-dashboard{grid-template-columns:repeat(2,minmax(0,1fr))}
      .section-head{display:block}
      .section-desc{margin-top:12px}
      .compare-shell,.shield-grid{grid-template-columns:1fr}
      .news-item{grid-template-columns:1fr;gap:8px}
      .news-date{width:max-content}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
      .start-card{padding:30px 20px;border-radius:28px}
    }
    @media (max-width:520px){
      body{font-size:15px}
      .section{padding:58px 0}
      .hero{padding:28px 0 48px}
      .hero h1{font-size:35px}
      .hero-actions .btn{width:100%}
      .hero-dashboard,.catalog-grid{grid-template-columns:1fr}
      .metric-card{min-height:auto}
      .group-head{display:grid}
      .tier{align-items:flex-start;flex-direction:column}
      .security-inner{padding:28px 18px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }