/* roulang page: index */
:root{
      --primary:#2563eb;
      --primary-strong:#1d4ed8;
      --primary-soft:#dbeafe;
      --secondary:#0f766e;
      --accent:#f59e0b;
      --bg:#f7fbff;
      --surface:#ffffff;
      --surface-2:#eef6ff;
      --text:#102033;
      --muted:#65758b;
      --weak:#91a1b5;
      --border:#dce8f6;
      --border-strong:#bdd3ee;
      --shadow-sm:0 8px 24px rgba(30,64,175,.08);
      --shadow-md:0 18px 45px rgba(30,64,175,.12);
      --shadow-lg:0 28px 70px rgba(15,35,80,.16);
      --radius-sm:14px;
      --radius-md:22px;
      --radius-lg:32px;
      --radius-xl:42px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;
      color:var(--text);
      line-height:1.75;
      background:
        radial-gradient(circle at 8% 8%, rgba(37,99,235,.12), transparent 28%),
        radial-gradient(circle at 92% 16%, rgba(14,165,233,.14), transparent 30%),
        linear-gradient(180deg,#ffffff 0%,var(--bg) 44%,#ffffff 100%);
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:var(--primary);color:white}
    .site-container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .skip-link{
      position:absolute;left:-999px;top:12px;background:var(--primary);color:#fff;
      padding:10px 14px;border-radius:10px;z-index:1000
    }
    .skip-link:focus{left:12px;outline:3px solid rgba(37,99,235,.25)}
    .glass{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(220,232,246,.92);
      box-shadow:var(--shadow-sm);
      backdrop-filter:blur(18px);
    }
    .site-header{
      position:sticky;top:0;z-index:50;
      border-bottom:1px solid rgba(220,232,246,.8);
      background:rgba(255,255,255,.84);
      backdrop-filter:blur(18px);
    }
    .nav-wrap{
      height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px
    }
    .logo{
      display:flex;align-items:center;gap:12px;min-width:0;font-weight:900;letter-spacing:-.03em;
      color:var(--primary-strong)
    }
    .logo-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;color:#fff;
      background:linear-gradient(135deg,#2563eb,#38bdf8);
      box-shadow:0 12px 28px rgba(37,99,235,.22);
      flex:0 0 auto;
    }
    .logo-text{font-size:18px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:360px}
    .nav-actions{display:flex;align-items:center;gap:12px}
    .nav-menu{display:flex;align-items:center;gap:8px}
    .nav-link{
      padding:10px 14px;border-radius:999px;color:#4b5f78;font-weight:700;font-size:14px;
      transition:.2s ease
    }
    .nav-link:hover,.nav-link:focus-visible{background:var(--primary-soft);color:var(--primary-strong);outline:none}
    .nav-link.active{background:#eef5ff;color:var(--primary-strong);box-shadow:inset 0 0 0 1px var(--border)}
    .nav-cta{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:11px 16px;border-radius:999px;color:white;font-weight:800;font-size:14px;
      background:linear-gradient(135deg,var(--primary),#0ea5e9);
      box-shadow:0 14px 30px rgba(37,99,235,.22);
      transition:.2s ease
    }
    .nav-cta:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(37,99,235,.30)}
    .menu-toggle{display:none;border:0;background:#eef5ff;color:var(--primary-strong);border-radius:14px;padding:10px}
    .section{padding:74px 0}
    .section-tight{padding:54px 0}
    .section-head{
      display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px
    }
    .section-kicker{
      display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border:1px solid var(--border);
      background:#fff;border-radius:999px;color:var(--primary-strong);font-weight:900;font-size:13px;
      box-shadow:var(--shadow-sm)
    }
    .section-title{font-size:clamp(26px,3vw,42px);line-height:1.18;font-weight:950;letter-spacing:-.045em;margin:10px 0 10px}
    .section-desc{color:var(--muted);max-width:720px;margin:0;font-size:16px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;
      border:1px solid transparent;border-radius:999px;padding:13px 20px;
      font-weight:900;line-height:1.2;transition:.22s ease;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#0ea5e9);color:#fff;box-shadow:0 18px 36px rgba(37,99,235,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 24px 48px rgba(37,99,235,.34)}
    .btn-secondary{background:#fff;color:var(--primary-strong);border-color:var(--border);box-shadow:var(--shadow-sm)}
    .btn-secondary:hover{border-color:var(--border-strong);transform:translateY(-2px);box-shadow:var(--shadow-md)}
    .btn-ghost{background:#eff6ff;color:var(--primary-strong);border-color:#cfe2ff}
    .btn:focus-visible,.card:focus-within{outline:4px solid rgba(37,99,235,.16);outline-offset:3px}
    .badge{
      display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border-radius:999px;
      color:#1e40af;background:#eff6ff;border:1px solid #dbeafe;font-weight:800;font-size:12px
    }
    .badge.green{color:#0f766e;background:#ecfdf5;border-color:#bbf7d0}
    .badge.orange{color:#9a5b00;background:#fff7ed;border-color:#fed7aa}
    .card{
      background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
      box-shadow:var(--shadow-sm);transition:.24s ease;overflow:hidden
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--border-strong)}
    .hero{padding:34px 0 76px}
    .hero-panel{
      position:relative;overflow:hidden;border-radius:var(--radius-xl);padding:34px;
      background:
        linear-gradient(110deg,rgba(255,255,255,.95),rgba(239,246,255,.94)),
        radial-gradient(circle at 85% 20%,rgba(56,189,248,.30),transparent 34%);
      border:1px solid var(--border);
      box-shadow:var(--shadow-lg)
    }
    .hero-panel:before{
      content:"";position:absolute;inset:auto -80px -120px auto;width:360px;height:360px;border-radius:50%;
      background:rgba(37,99,235,.12);filter:blur(8px)
    }
    .hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:28px;align-items:stretch}
    .hero-copy{padding:18px 0 10px}
    .hero h1{
      font-size:clamp(34px,5vw,64px);line-height:1.06;letter-spacing:-.06em;font-weight:1000;
      margin:16px 0 18px;color:#0e233d
    }
    .hero-intro{font-size:17px;color:#52677f;max-width:700px;margin:0 0 24px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;max-width:720px}
    .point{
      border:1px solid var(--border);background:rgba(255,255,255,.76);border-radius:18px;padding:14px;
      box-shadow:0 8px 20px rgba(30,64,175,.06)
    }
    .point strong{display:block;font-size:24px;line-height:1;color:var(--primary-strong);letter-spacing:-.04em}
    .point span{display:block;color:var(--muted);font-size:13px;margin-top:8px}
    .slot-board{
      display:grid;gap:14px;align-content:start;padding:18px;border-radius:30px;
      background:linear-gradient(180deg,#ffffff,#eef6ff);
      border:1px solid var(--border);box-shadow:inset 0 1px 0 rgba(255,255,255,.8),var(--shadow-sm)
    }
    .slot-top{display:flex;justify-content:space-between;gap:12px;align-items:center}
    .slot-top h2{font-size:20px;font-weight:950;letter-spacing:-.035em;margin:0}
    .slot-card{
      border-radius:22px;border:1px solid var(--border);background:#fff;padding:16px;
      display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;transition:.2s ease
    }
    .slot-card:hover{border-color:#93c5fd;transform:translateX(3px)}
    .slot-time{font-weight:950;color:#0f2440}
    .slot-note{font-size:13px;color:var(--muted);margin-top:4px}
    .slot-status{font-size:12px;font-weight:900;padding:7px 10px;border-radius:999px}
    .status-low{background:#ecfdf5;color:#047857}
    .status-mid{background:#eff6ff;color:#1d4ed8}
    .status-hot{background:#fff7ed;color:#b45309}
    .mini-form{
      border-radius:24px;background:#0f2a4d;color:white;padding:18px;
      display:grid;gap:12px;box-shadow:0 18px 40px rgba(15,42,77,.18)
    }
    .mini-form label{font-size:13px;color:#c9ddff;font-weight:800}
    .mini-form select{
      width:100%;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.08);
      color:white;border-radius:14px;padding:11px 12px;outline:none
    }
    .mini-form select option{color:#102033;background:#fff}
    .track-wrap{display:grid;grid-template-columns:.82fr 1.18fr;gap:24px;align-items:stretch}
    .metric-board{
      padding:22px;border-radius:var(--radius-lg);background:#102b52;color:#fff;
      box-shadow:var(--shadow-lg);position:relative;overflow:hidden
    }
    .metric-board:after{
      content:"";position:absolute;right:-80px;top:-80px;width:220px;height:220px;border-radius:50%;
      background:rgba(59,130,246,.26)
    }
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px;position:relative}
    .metric{
      border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.08);border-radius:20px;padding:18px
    }
    .metric b{font-size:30px;line-height:1;font-weight:1000;letter-spacing:-.05em}
    .metric span{display:block;color:#c7d9f6;font-size:13px;margin-top:8px}
    .rail-list{display:grid;gap:14px}
    .rail-item{
      display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:16px;
      border-radius:22px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm);
      transition:.2s ease
    }
    .rail-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
    .rail-index{
      width:42px;height:42px;border-radius:16px;display:grid;place-items:center;
      background:#eff6ff;color:var(--primary-strong);font-weight:1000
    }
    .rail-item h3{margin:0;font-size:17px;font-weight:950}
    .rail-item p{margin:4px 0 0;color:var(--muted);font-size:14px}
    .trend{font-size:13px;color:#0f766e;font-weight:900;background:#ecfdf5;border-radius:999px;padding:7px 10px}
    .recommend-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
    .feature-matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .feature-card{padding:20px}
    .feature-icon{
      width:44px;height:44px;border-radius:16px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg,#eff6ff,#dbeafe);color:var(--primary-strong);font-weight:1000
    }
    .feature-card h3{font-size:18px;font-weight:950;margin:0 0 8px}
    .feature-card p{margin:0;color:var(--muted);font-size:14px}
    .rank-card{padding:22px;background:linear-gradient(180deg,#fff,#f5f9ff)}
    .rank-list{display:grid;gap:10px;margin-top:18px}
    .rank-row{
      display:grid;grid-template-columns:30px 1fr auto;gap:12px;align-items:center;
      padding:12px;border-radius:16px;border:1px solid var(--border);background:#fff
    }
    .rank-no{font-weight:1000;color:var(--primary-strong)}
    .rank-title{font-weight:900;font-size:14px}
    .rank-score{font-size:12px;color:#0f766e;font-weight:900}
    .compare-wrap{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .compare-card{padding:22px}
    .compare-card.before{background:#fff7ed;border-color:#fed7aa}
    .compare-card.after{background:#f0fdf4;border-color:#bbf7d0}
    .compare-card h3{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:950;margin:0 0 16px}
    .check-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
    .check-list li{display:flex;gap:10px;color:#43566e;font-size:15px}
    .check-list li:before{
      content:"";width:9px;height:9px;border-radius:99px;margin-top:10px;flex:0 0 auto;background:var(--primary)
    }
    .before .check-list li:before{background:#f59e0b}
    .after .check-list li:before{background:#10b981}
    .category-strip{
      margin-top:18px;display:flex;flex-wrap:wrap;gap:10px
    }
    .category-pill{
      border:1px solid var(--border);background:#fff;border-radius:999px;padding:9px 12px;
      color:#36506c;font-weight:800;font-size:13px;transition:.2s ease
    }
    .category-pill:hover{background:#eff6ff;color:var(--primary-strong);border-color:#bfdbfe}
    .news-layout{display:grid;grid-template-columns:1.45fr .55fr;gap:24px;align-items:start}
    .news-list{display:grid;gap:12px}
    .news-link{
      display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;
      padding:16px;border-radius:20px;background:#fff;border:1px solid var(--border);
      transition:.2s ease;box-shadow:0 8px 22px rgba(30,64,175,.05)
    }
    .news-link:hover{transform:translateX(4px);border-color:#bfdbfe;box-shadow:var(--shadow-sm)}
    .news-date{font-size:12px;font-weight:950;color:var(--primary-strong);background:#eff6ff;border-radius:12px;padding:8px 10px;text-align:center}
    .news-link h3{margin:0;font-size:16px;font-weight:950}
    .news-link p{margin:4px 0 0;color:var(--muted);font-size:13px}
    .arrow{color:var(--weak);font-weight:950}
    .quote-card{padding:22px;background:#102b52;color:#fff;position:sticky;top:96px}
    .quote-card p{color:#d8e7ff;margin:12px 0}
    .quote-card strong{display:block;font-size:20px;line-height:1.35}
    .trust-bar{
      display:grid;grid-template-columns:repeat(4,1fr);gap:14px
    }
    .trust-item{
      padding:18px;border-radius:22px;background:#fff;border:1px solid var(--border);
      box-shadow:var(--shadow-sm);display:flex;gap:12px;align-items:flex-start
    }
    .trust-icon{
      width:40px;height:40px;border-radius:15px;background:#eff6ff;color:var(--primary-strong);
      display:grid;place-items:center;font-weight:1000;flex:0 0 auto
    }
    .trust-item b{display:block;font-weight:950}
    .trust-item span{display:block;color:var(--muted);font-size:13px;margin-top:3px}
    .faq-grid{display:grid;grid-template-columns:.88fr 1.12fr;gap:24px;align-items:start}
    .faq-aside{padding:24px;border-radius:var(--radius-lg);background:#eff6ff;border:1px solid #dbeafe}
    .faq-aside h2{font-size:28px;font-weight:1000;letter-spacing:-.04em;margin:0 0 10px}
    .faq-aside p{color:var(--muted);margin:0 0 18px}
    .faq-list{display:grid;gap:12px}
    details.faq-item{
      background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-sm);
      padding:0;overflow:hidden
    }
    .faq-item summary{
      list-style:none;padding:17px 18px;font-weight:950;display:flex;align-items:center;justify-content:space-between;gap:16px;
      cursor:pointer;color:#132943
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";font-size:24px;color:var(--primary);line-height:1}
    .faq-item[open] summary:after{content:"−"}
    .faq-item p{margin:0;padding:0 18px 18px;color:var(--muted);font-size:15px}
    .cta-panel{
      border-radius:var(--radius-xl);padding:30px;background:
        linear-gradient(135deg,#102b52 0%,#1d4ed8 58%,#38bdf8 100%);
      color:white;box-shadow:var(--shadow-lg);overflow:hidden;position:relative
    }
    .cta-panel:before{
      content:"";position:absolute;inset:-80px auto auto -80px;width:250px;height:250px;border-radius:50%;
      background:rgba(255,255,255,.12)
    }
    .cta-grid{position:relative;display:grid;grid-template-columns:.95fr 1.05fr;gap:26px;align-items:center}
    .cta-panel h2{font-size:clamp(28px,4vw,46px);line-height:1.15;font-weight:1000;letter-spacing:-.055em;margin:0 0 12px}
    .cta-panel p{color:#d8e7ff;margin:0 0 18px}
    .lead-form{
      background:rgba(255,255,255,.96);color:var(--text);border-radius:28px;padding:20px;
      display:grid;gap:14px;box-shadow:0 18px 46px rgba(5,18,45,.18)
    }
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .field label{display:block;font-size:13px;font-weight:900;color:#496078;margin-bottom:7px}
    .field input,.field select{
      width:100%;border:1px solid var(--border);border-radius:15px;padding:12px 13px;
      background:#fff;color:var(--text);outline:none;transition:.2s ease
    }
    .field input:focus,.field select:focus{border-color:#93c5fd;box-shadow:0 0 0 4px rgba(37,99,235,.10)}
    .form-hint{font-size:12px;color:var(--muted);margin:0}
    .site-footer{
      padding:40px 0 30px;background:#081c35;color:#d8e7ff;margin-top:34px
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:start}
    .footer-name{font-size:20px;font-weight:1000;color:#fff;letter-spacing:-.04em;margin:0 0 10px}
    .footer-desc{color:#adc2df;margin:0;max-width:720px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
    .footer-links a{
      padding:9px 12px;border:1px solid rgba(255,255,255,.12);border-radius:999px;color:#d8e7ff;
      transition:.2s ease
    }
    .footer-links a:hover{background:rgba(255,255,255,.08);color:#fff}
    .copyright{
      margin-top:24px;padding-top:22px;border-top:1px solid rgba(255,255,255,.10);
      display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:#94a9c6;font-size:13px
    }
    @media (max-width:1024px){
      .hero-grid,.track-wrap,.recommend-layout,.news-layout,.faq-grid,.cta-grid{grid-template-columns:1fr}
      .quote-card{position:relative;top:auto}
      .trust-bar{grid-template-columns:repeat(2,1fr)}
      .logo-text{max-width:280px}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px,var(--container))}
      .nav-wrap{height:68px}
      .menu-toggle{display:grid;place-items:center}
      .nav-actions{position:relative}
      .nav-menu{
        position:absolute;right:0;top:52px;display:none;min-width:190px;flex-direction:column;align-items:stretch;
        padding:10px;border:1px solid var(--border);background:#fff;border-radius:18px;box-shadow:var(--shadow-md)
      }
      .nav-menu.open{display:flex}
      .nav-link{border-radius:14px}
      .nav-cta{display:none}
      .hero{padding-top:22px}
      .hero-panel{padding:22px;border-radius:30px}
      .hero-points,.metric-grid,.feature-matrix,.compare-wrap,.form-row{grid-template-columns:1fr}
      .section{padding:56px 0}
      .section-head{display:block}
      .rail-item,.news-link{grid-template-columns:auto 1fr}
      .trend,.arrow{grid-column:2}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:520px){
      .logo-mark{width:38px;height:38px;border-radius:14px}
      .logo-text{font-size:15px;max-width:210px}
      .hero h1{font-size:34px}
      .hero-actions .btn{width:100%}
      .slot-top{align-items:flex-start;flex-direction:column}
      .slot-card{grid-template-columns:1fr}
      .trust-bar{grid-template-columns:1fr}
      .cta-panel{padding:22px;border-radius:30px}
      .section-title{font-size:27px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }