/* roulang page: index */
:root{
      --primary:#1d4ed8;
      --primary-600:#2563eb;
      --primary-700:#1e40af;
      --primary-soft:#eaf2ff;
      --secondary:#0f766e;
      --accent:#f59e0b;
      --ink:#102033;
      --muted:#667085;
      --light:#f6f9ff;
      --surface:#ffffff;
      --surface-2:#f8fbff;
      --border:#dce6f4;
      --border-strong:#b8c8df;
      --danger:#ef4444;
      --success:#16a34a;
      --shadow-sm:0 8px 22px rgba(16,32,51,.08);
      --shadow-md:0 18px 45px rgba(29,78,216,.14);
      --shadow-lg:0 28px 70px rgba(15,23,42,.16);
      --radius-sm:12px;
      --radius-md:18px;
      --radius-lg:28px;
      --radius-pill:999px;
      --container:1180px;
      --section:92px;
      --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font-sans);
      color:var(--ink);
      background:
        radial-gradient(circle at 8% 2%, rgba(37,99,235,.10), transparent 28%),
        linear-gradient(180deg,#ffffff 0%,#f7fbff 42%,#ffffff 100%);
      line-height:1.72;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease}
    a:hover{color:var(--primary)}
    img,svg{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{border:0}
    ::selection{background:rgba(37,99,235,.16);color:var(--primary-700)}
    .container-custom{width:min(var(--container), calc(100% - 40px));margin-inline:auto}
    .section-pad{padding:var(--section) 0}
    .section-pad-sm{padding:70px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:var(--radius-pill);
      background:var(--primary-soft);
      color:var(--primary-700);
      font-weight:700;
      font-size:13px;
      letter-spacing:.02em;
      border:1px solid rgba(29,78,216,.10);
    }
    .eyebrow::before{
      content:"";
      width:7px;height:7px;border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 0 5px rgba(37,99,235,.12);
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:28px;
      margin-bottom:30px;
    }
    .section-title{
      margin:14px 0 0;
      font-size:clamp(28px,3.2vw,42px);
      line-height:1.18;
      letter-spacing:-.04em;
      font-weight:850;
      color:#0b1728;
    }
    .section-desc{
      margin:0;
      max-width:560px;
      color:var(--muted);
      font-size:16px;
    }
    .text-muted-custom{color:var(--muted)}
    .soft-divider{height:1px;background:linear-gradient(90deg, transparent, var(--border), transparent)}
    .btn-brand,
    .btn-ghost,
    .btn-light-brand{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:48px;
      padding:12px 20px;
      border-radius:var(--radius-pill);
      font-weight:800;
      letter-spacing:.01em;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
      cursor:pointer;
      white-space:nowrap;
    }
    .btn-brand{
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--primary-600));
      box-shadow:0 14px 30px rgba(37,99,235,.25);
    }
    .btn-brand:hover{color:#fff;transform:translateY(-2px);box-shadow:0 18px 38px rgba(37,99,235,.32)}
    .btn-brand:active{transform:translateY(0);box-shadow:0 9px 20px rgba(37,99,235,.22)}
    .btn-ghost{
      color:var(--primary-700);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
    }
    .btn-ghost:hover{background:var(--primary-soft);border-color:#c7d9ff;transform:translateY(-2px)}
    .btn-light-brand{
      color:var(--primary-700);
      background:#eef5ff;
      border:1px solid #cfe0ff;
    }
    .btn-light-brand:hover{background:#fff;transform:translateY(-2px);box-shadow:var(--shadow-sm)}
    .focus-ring:focus,
    .btn-brand:focus,
    .btn-ghost:focus,
    .btn-light-brand:focus,
    input:focus,
    textarea:focus{
      outline:3px solid rgba(37,99,235,.20);
      outline-offset:2px;
      border-color:rgba(37,99,235,.55)!important;
      box-shadow:none;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      background:rgba(255,255,255,.88);
      backdrop-filter:saturate(180%) blur(16px);
      border-bottom:1px solid rgba(220,230,244,.9);
      box-shadow:0 8px 28px rgba(16,32,51,.04);
    }
    .notice-line{
      background:linear-gradient(90deg,#eff6ff,#ffffff,#f2f8ff);
      border-bottom:1px solid rgba(220,230,244,.76);
      font-size:13px;
      color:#36516f;
    }
    .notice-line .container-custom{
      display:flex;
      align-items:center;
      justify-content:space-between;
      min-height:36px;
      gap:16px;
    }
    .notice-chips{display:flex;align-items:center;gap:8px;overflow-x:auto;white-space:nowrap;padding:4px 0}
    .notice-chip{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:4px 10px;
      border-radius:var(--radius-pill);
      background:#fff;
      border:1px solid #dbe7f8;
      color:#24476d;
      font-weight:700;
    }
    .notice-chip strong{color:var(--primary-700)}
    .navbar-custom{padding:14px 0}
    .brand-logo{
      display:inline-flex;
      align-items:center;
      gap:12px;
      font-weight:900;
      color:#0b1728;
      letter-spacing:-.03em;
      min-width:0;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;
      color:#fff;
      background:
        linear-gradient(135deg,rgba(255,255,255,.18),transparent),
        linear-gradient(135deg,var(--primary),#0f766e);
      box-shadow:0 14px 28px rgba(29,78,216,.24);
      flex:0 0 auto;
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      line-height:1.1;
    }
    .brand-text span:first-child{font-size:18px}
    .brand-text span:last-child{font-size:12px;color:var(--muted);font-weight:700;letter-spacing:.06em;margin-top:4px}
    .navbar-toggler{
      border:1px solid var(--border);
      border-radius:12px;
      padding:8px 10px;
      background:#fff;
    }
    .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(37,99,235,.16)}
    .nav-main .nav-link{
      color:#334155;
      font-weight:800;
      padding:10px 16px!important;
      border-radius:var(--radius-pill);
    }
    .nav-main .nav-link:hover{background:var(--primary-soft);color:var(--primary-700)}
    .nav-main .nav-link.active{
      color:#fff!important;
      background:linear-gradient(135deg,var(--primary),var(--primary-600));
      box-shadow:0 10px 22px rgba(37,99,235,.22);
    }
    .header-search{
      display:flex;
      align-items:center;
      gap:8px;
      padding:6px;
      border:1px solid var(--border);
      border-radius:var(--radius-pill);
      background:#fff;
      box-shadow:0 8px 22px rgba(16,32,51,.05);
      min-width:280px;
    }
    .header-search input{
      border:0;
      outline:0;
      width:100%;
      min-width:0;
      color:var(--ink);
      padding:7px 8px 7px 12px;
      background:transparent;
      font-size:14px;
    }
    .header-search button{
      width:36px;height:36px;
      border-radius:50%;
      background:var(--primary);
      color:#fff;
      display:grid;place-items:center;
      transition:background .2s ease, transform .2s ease;
    }
    .header-search button:hover{background:var(--primary-700);transform:scale(1.04)}

    .hero{
      padding:58px 0 48px;
    }
    .hero-banner{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      min-height:560px;
      background:
        linear-gradient(115deg,rgba(7,19,40,.82),rgba(29,78,216,.72) 46%,rgba(15,118,110,.62)),
        radial-gradient(circle at 80% 18%, rgba(255,255,255,.38), transparent 20%),
        linear-gradient(135deg,#173a78,#0f766e);
      box-shadow:var(--shadow-lg);
      color:#fff;
      isolation:isolate;
    }
    .hero-banner::before{
      content:"";
      position:absolute;
      inset:0;
      background-image:
        linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
      background-size:46px 46px;
      mask-image:linear-gradient(90deg,rgba(0,0,0,.82),rgba(0,0,0,.32));
      z-index:-2;
    }
    .hero-banner::after{
      content:"";
      position:absolute;
      right:-90px;
      bottom:-160px;
      width:520px;height:520px;
      border-radius:50%;
      background:rgba(255,255,255,.16);
      filter:blur(2px);
      z-index:-1;
    }
    .hero-content{
      min-height:560px;
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:34px;
      align-items:stretch;
      padding:54px;
    }
    .hero-copy{
      display:flex;
      flex-direction:column;
      justify-content:center;
      max-width:690px;
    }
    .hero-kicker{
      display:inline-flex;
      width:max-content;
      align-items:center;
      gap:9px;
      padding:8px 13px;
      border-radius:var(--radius-pill);
      background:rgba(255,255,255,.14);
      border:1px solid rgba(255,255,255,.28);
      color:#eaf3ff;
      font-size:14px;
      font-weight:800;
      backdrop-filter:blur(10px);
    }
    .hero h1{
      margin:20px 0 18px;
      font-size:clamp(38px,5.7vw,72px);
      line-height:1.03;
      letter-spacing:-.065em;
      font-weight:950;
      max-width:820px;
    }
    .hero-lead{
      font-size:clamp(17px,1.7vw,20px);
      color:rgba(255,255,255,.88);
      max-width:740px;
      margin:0 0 28px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-bottom:30px;
    }
    .hero .btn-ghost{
      background:rgba(255,255,255,.94);
      color:#11305e;
      border-color:rgba(255,255,255,.6);
    }
    .hero-points{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
      max-width:680px;
    }
    .hero-point{
      padding:14px 15px;
      border-radius:18px;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.2);
      backdrop-filter:blur(12px);
    }
    .hero-point b{
      display:block;
      font-size:20px;
      line-height:1.2;
      margin-bottom:4px;
    }
    .hero-point span{font-size:13px;color:rgba(255,255,255,.78)}
    .hero-stage{
      display:grid;
      align-content:center;
      gap:16px;
      padding:18px;
    }
    .stage-panel{
      position:relative;
      overflow:hidden;
      padding:24px;
      border-radius:26px;
      background:rgba(255,255,255,.92);
      color:var(--ink);
      box-shadow:0 24px 55px rgba(7,19,40,.20);
      border:1px solid rgba(255,255,255,.7);
    }
    .stage-panel.large{
      min-height:236px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      background:
        radial-gradient(circle at 18% 20%, rgba(37,99,235,.18), transparent 28%),
        #ffffff;
    }
    .stage-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      color:#15315a;
      font-weight:900;
      margin-bottom:16px;
    }
    .stage-badge{
      padding:5px 10px;
      border-radius:var(--radius-pill);
      background:#ecfdf5;
      color:#047857;
      font-size:12px;
      font-weight:900;
    }
    .calm-meter{
      height:15px;
      border-radius:var(--radius-pill);
      background:#e6edf8;
      overflow:hidden;
      margin:16px 0;
    }
    .calm-meter span{
      display:block;
      height:100%;
      width:68%;
      border-radius:inherit;
      background:linear-gradient(90deg,var(--secondary),var(--primary-600));
    }
    .stage-note{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .stage-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:16px;
    }
    .mini-check{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:14px;
      border-radius:18px;
      background:#f6f9ff;
      border:1px solid var(--border);
    }
    .mini-check i{
      width:26px;height:26px;border-radius:10px;
      display:grid;place-items:center;
      background:var(--primary-soft);
      color:var(--primary);
      flex:0 0 auto;
      font-style:normal;
      font-weight:900;
    }
    .mini-check strong{display:block;font-size:14px;margin-bottom:2px}
    .mini-check span{display:block;font-size:12px;color:var(--muted);line-height:1.5}
    .ticker{
      margin-top:18px;
      overflow:hidden;
      border-radius:20px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
    }
    .ticker-inner{
      display:flex;
      gap:26px;
      width:max-content;
      padding:13px 18px;
      animation:ticker 24s linear infinite;
      color:#2a4260;
      font-weight:800;
      font-size:14px;
    }
    .ticker-inner span::before{content:"●";color:var(--primary);margin-right:8px}
    @keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}

    .about-grid{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:28px;
      align-items:stretch;
    }
    .about-card{
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
      padding:30px;
    }
    .about-card.emphasis{
      background:
        linear-gradient(180deg,rgba(234,242,255,.78),rgba(255,255,255,.96)),
        #fff;
    }
    .about-card h2,.about-card h3{margin:0 0 14px;font-weight:900;letter-spacing:-.03em}
    .about-card p{margin:0;color:var(--muted)}
    .kpi-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }
    .kpi-item{
      padding:24px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
      transition:transform .2s ease, box-shadow .2s ease;
    }
    .kpi-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
    .kpi-num{
      display:block;
      font-size:34px;
      line-height:1;
      font-weight:950;
      color:var(--primary-700);
      letter-spacing:-.04em;
      margin-bottom:10px;
    }
    .kpi-item span:last-child{color:var(--muted);font-size:14px}

    .news-section{background:linear-gradient(180deg,#f8fbff,#ffffff)}
    .news-layout{
      display:grid;
      grid-template-columns:1.5fr .72fr;
      gap:24px;
      align-items:start;
    }
    .news-list{
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
      overflow:hidden;
    }
    .news-item{
      display:grid;
      grid-template-columns:118px 1fr auto;
      gap:18px;
      align-items:center;
      padding:22px 24px;
      border-bottom:1px solid var(--border);
    }
    .news-item:last-child{border-bottom:0}
    .news-date{
      display:flex;
      flex-direction:column;
      gap:2px;
      color:var(--primary-700);
      font-weight:900;
      line-height:1.15;
    }
    .news-date small{color:var(--muted);font-weight:700}
    .news-title{
      display:inline-block;
      font-size:18px;
      font-weight:900;
      color:#102033;
      margin-bottom:6px;
    }
    .news-title:hover{color:var(--primary)}
    .news-summary{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.62;
    }
    .news-tag{
      padding:7px 11px;
      border-radius:var(--radius-pill);
      background:var(--primary-soft);
      color:var(--primary-700);
      font-weight:900;
      font-size:12px;
      white-space:nowrap;
    }
    .recommend-box{
      position:sticky;
      top:132px;
      border-radius:var(--radius-lg);
      padding:24px;
      background:#102033;
      color:#fff;
      box-shadow:var(--shadow-md);
      overflow:hidden;
    }
    .recommend-box::after{
      content:"";
      position:absolute;
      right:-70px;top:-80px;
      width:210px;height:210px;border-radius:50%;
      background:rgba(37,99,235,.36);
    }
    .recommend-box h3{position:relative;margin:0 0 12px;font-weight:900}
    .recommend-box p{position:relative;color:rgba(255,255,255,.74);font-size:14px;margin:0 0 18px}
    .rank-list{position:relative;display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .rank-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:12px;
      border-radius:16px;
      background:rgba(255,255,255,.09);
      border:1px solid rgba(255,255,255,.12);
    }
    .rank-list b{
      width:24px;height:24px;border-radius:8px;
      display:grid;place-items:center;
      background:#fff;color:var(--primary-700);
      flex:0 0 auto;
      font-size:12px;
    }
    .rank-list span{font-size:14px;line-height:1.55;color:rgba(255,255,255,.88)}

    .service-mosaic{
      display:grid;
      grid-template-columns:1fr 1fr 1fr;
      gap:22px;
    }
    .service-card{
      position:relative;
      min-height:260px;
      padding:26px;
      border-radius:var(--radius-lg);
      border:1px solid var(--border);
      background:#fff;
      box-shadow:var(--shadow-sm);
      overflow:hidden;
      transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .service-card:nth-child(2){margin-top:32px}
    .service-card:nth-child(3){margin-top:64px}
    .service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:#c7d9ff}
    .icon-box{
      width:52px;height:52px;border-radius:18px;
      display:grid;place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 14px 28px rgba(37,99,235,.20);
      margin-bottom:20px;
      font-weight:950;
      font-size:20px;
    }
    .service-card h3{font-size:22px;font-weight:900;margin:0 0 12px;letter-spacing:-.03em}
    .service-card p{color:var(--muted);margin:0 0 18px;font-size:15px}
    .service-list{list-style:none;padding:0;margin:0;display:grid;gap:9px}
    .service-list li{display:flex;gap:8px;color:#36516f;font-weight:700;font-size:14px}
    .service-list li::before{content:"✓";color:var(--secondary);font-weight:950}

    .topic-wrap{
      display:grid;
      grid-template-columns:.78fr 1.22fr;
      gap:28px;
      align-items:start;
    }
    .topic-intro{
      border-radius:var(--radius-lg);
      background:linear-gradient(180deg,#102033,#173a78);
      color:#fff;
      padding:32px;
      box-shadow:var(--shadow-md);
    }
    .topic-intro h2{font-size:34px;line-height:1.15;font-weight:950;letter-spacing:-.04em;margin:14px 0}
    .topic-intro p{color:rgba(255,255,255,.76);margin:0 0 22px}
    .topic-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }
    .topic-card{
      padding:22px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
      transition:transform .2s ease, box-shadow .2s ease;
    }
    .topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
    .topic-card strong{display:block;font-size:18px;margin-bottom:8px;color:#0b1728}
    .topic-card p{margin:0;color:var(--muted);font-size:14px}
    .topic-label{
      display:inline-flex;
      margin-bottom:12px;
      padding:4px 10px;
      border-radius:var(--radius-pill);
      background:#edf7ff;
      color:var(--primary-700);
      font-size:12px;
      font-weight:900;
    }

    .pricing{
      background:linear-gradient(180deg,#fff,#f6f9ff);
    }
    .pricing-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:22px;
      align-items:stretch;
    }
    .price-card{
      position:relative;
      padding:28px;
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
      display:flex;
      flex-direction:column;
      min-height:390px;
      transition:transform .2s ease, box-shadow .2s ease;
    }
    .price-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
    .price-card.recommended{
      border:2px solid rgba(37,99,235,.45);
      box-shadow:var(--shadow-md);
      transform:translateY(-12px);
    }
    .recommend-ribbon{
      position:absolute;
      right:22px;
      top:22px;
      padding:6px 11px;
      border-radius:var(--radius-pill);
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      color:#fff;
      font-size:12px;
      font-weight:900;
    }
    .price-card h3{font-weight:950;margin:0 0 10px}
    .price{
      display:flex;
      align-items:flex-end;
      gap:6px;
      margin:14px 0;
      color:#0b1728;
    }
    .price b{font-size:40px;line-height:1;font-weight:950;letter-spacing:-.05em}
    .price span{color:var(--muted);font-weight:700}
    .price-card p{color:var(--muted);font-size:14px;margin:0 0 18px}
    .price-features{list-style:none;padding:0;margin:0 0 24px;display:grid;gap:10px}
    .price-features li{display:flex;gap:9px;color:#334155;font-weight:700;font-size:14px}
    .price-features li::before{content:"•";color:var(--primary);font-size:22px;line-height:16px}
    .price-card .btn-brand,.price-card .btn-ghost{margin-top:auto;width:100%}

    .app-panel{
      display:grid;
      grid-template-columns:1fr .9fr;
      gap:28px;
      align-items:center;
      border-radius:34px;
      padding:42px;
      background:
        radial-gradient(circle at 90% 18%, rgba(245,158,11,.22), transparent 25%),
        linear-gradient(135deg,#eef6ff,#ffffff 48%,#f7fbff);
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
    }
    .app-panel h2{font-weight:950;font-size:clamp(30px,4vw,46px);letter-spacing:-.05em;line-height:1.12;margin:14px 0}
    .app-panel p{color:var(--muted);margin:0 0 22px}
    .app-actions{display:flex;flex-wrap:wrap;gap:12px}
    .device-card{
      padding:20px;
      border-radius:28px;
      background:#102033;
      color:#fff;
      box-shadow:var(--shadow-lg);
    }
    .device-screen{
      min-height:320px;
      border-radius:22px;
      padding:22px;
      background:
        linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.04)),
        #142a46;
      border:1px solid rgba(255,255,255,.12);
    }
    .device-screen h3{font-weight:900;margin:0 0 14px}
    .app-step{
      display:flex;
      gap:12px;
      padding:13px 0;
      border-bottom:1px solid rgba(255,255,255,.1);
    }
    .app-step:last-child{border-bottom:0}
    .app-step b{
      width:30px;height:30px;border-radius:10px;
      background:rgba(255,255,255,.14);
      display:grid;place-items:center;
      flex:0 0 auto;
    }
    .app-step span{color:rgba(255,255,255,.78);font-size:14px}

    .version-timeline{
      position:relative;
      display:grid;
      gap:18px;
      max-width:920px;
      margin-inline:auto;
    }
    .version-item{
      display:grid;
      grid-template-columns:140px 1fr;
      gap:22px;
      align-items:start;
      padding:24px;
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
    }
    .version-no{
      display:inline-flex;
      justify-content:center;
      padding:8px 12px;
      border-radius:var(--radius-pill);
      background:#eef5ff;
      color:var(--primary-700);
      font-weight:950;
    }
    .version-item h3{font-weight:900;margin:0 0 8px;font-size:20px}
    .version-item p{margin:0;color:var(--muted);font-size:15px}

    .proof{
      background:#f6f9ff;
    }
    .proof-grid{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:24px;
      align-items:stretch;
    }
    .proof-stats{
      display:grid;
      gap:16px;
    }
    .proof-stat{
      padding:24px;
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
    }
    .proof-stat b{display:block;color:var(--primary-700);font-size:34px;line-height:1;font-weight:950;margin-bottom:8px}
    .proof-stat span{color:var(--muted);font-weight:700}
    .bubble-wall{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }
    .bubble{
      padding:22px;
      border-radius:24px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
    }
    .bubble p{margin:0 0 16px;color:#334155;font-size:15px}
    .person{
      display:flex;
      align-items:center;
      gap:10px;
    }
    .avatar{
      width:38px;height:38px;border-radius:50%;
      display:grid;place-items:center;
      background:linear-gradient(135deg,#dbeafe,#ccfbf1);
      color:var(--primary-700);
      font-weight:950;
    }
    .person strong{display:block;font-size:14px}
    .person span{display:block;color:var(--muted);font-size:12px}

    .faq-wrap{
      display:grid;
      grid-template-columns:.75fr 1.25fr;
      gap:30px;
      align-items:start;
    }
    .faq-aside{
      padding:28px;
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow-sm);
      position:sticky;
      top:132px;
    }
    .faq-aside h2{font-weight:950;letter-spacing:-.04em;margin:14px 0}
    .faq-aside p{color:var(--muted);margin:0 0 20px}
    .accordion-custom .accordion-item{
      border:1px solid var(--border);
      border-radius:20px!important;
      overflow:hidden;
      margin-bottom:14px;
      box-shadow:var(--shadow-sm);
      background:#fff;
    }
    .accordion-custom .accordion-button{
      padding:20px 22px;
      font-weight:900;
      color:#102033;
      background:#fff;
      box-shadow:none;
      line-height:1.45;
    }
    .accordion-custom .accordion-button:not(.collapsed){
      background:var(--primary-soft);
      color:var(--primary-700);
    }
    .accordion-custom .accordion-button:focus{box-shadow:0 0 0 3px rgba(37,99,235,.14)}
    .accordion-custom .accordion-body{
      padding:0 22px 22px;
      color:var(--muted);
      font-size:15px;
      background:#fff;
    }

    .lead-section{padding:34px 0 86px}
    .lead-card{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:28px;
      padding:34px;
      border-radius:34px;
      background:
        radial-gradient(circle at 14% 18%, rgba(37,99,235,.16), transparent 24%),
        linear-gradient(135deg,#102033,#173a78);
      color:#fff;
      box-shadow:var(--shadow-lg);
      overflow:hidden;
    }
    .lead-card h2{font-size:clamp(30px,4vw,46px);font-weight:950;letter-spacing:-.05em;line-height:1.12;margin:14px 0}
    .lead-card p{color:rgba(255,255,255,.78);margin:0 0 20px}
    .privacy-note{
      display:flex;
      gap:10px;
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.16);
      color:rgba(255,255,255,.82);
      font-size:14px;
    }
    .lead-form{
      padding:24px;
      border-radius:28px;
      background:#fff;
      color:var(--ink);
      box-shadow:0 20px 50px rgba(0,0,0,.16);
    }
    .form-label{font-weight:850;color:#1f344d}
    .form-control,.form-select{
      border:1px solid var(--border);
      border-radius:16px;
      padding:12px 14px;
      background:#fbfdff;
      color:var(--ink);
    }
    textarea.form-control{min-height:116px;resize:vertical}
    .form-hint{font-size:13px;color:var(--muted);margin-top:10px}
    .form-message{
      display:none;
      margin-top:14px;
      padding:12px 14px;
      border-radius:16px;
      background:#ecfdf5;
      color:#047857;
      font-weight:800;
      border:1px solid #bbf7d0;
    }
    .form-message.show{display:block}

    .site-footer{
      background:#071328;
      color:#d8e6f7;
      padding:54px 0 24px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.1fr .8fr .8fr;
      gap:30px;
      padding-bottom:34px;
      border-bottom:1px solid rgba(255,255,255,.10);
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:12px;
      color:#fff;
      font-weight:950;
      font-size:20px;
      margin-bottom:14px;
    }
    .footer-brand .brand-mark{width:40px;height:40px;box-shadow:none}
    .footer-desc{color:rgba(216,230,247,.72);max-width:520px;margin:0}
    .footer-col h3{font-size:16px;font-weight:900;color:#fff;margin:0 0 14px}
    .footer-links{list-style:none;padding:0;margin:0;display:grid;gap:10px}
    .footer-links a{color:rgba(216,230,247,.74);font-weight:700}
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:16px;
      padding-top:22px;
      color:rgba(216,230,247,.58);
      font-size:13px;
    }
    .footer-bottom a{color:rgba(216,230,247,.75)}
    .footer-bottom a:hover{color:#fff}

    @media (max-width: 1024px){
      :root{--section:76px}
      .hero-content{grid-template-columns:1fr;padding:42px;min-height:auto}
      .hero-copy{max-width:none}
      .hero-stage{grid-template-columns:1fr 1fr;align-items:stretch}
      .stage-panel.large{min-height:auto}
      .about-grid,.news-layout,.topic-wrap,.app-panel,.proof-grid,.faq-wrap,.lead-card{grid-template-columns:1fr}
      .recommend-box,.faq-aside{position:relative;top:auto}
      .service-mosaic,.pricing-grid{grid-template-columns:1fr 1fr}
      .service-card:nth-child(2),.service-card:nth-child(3),.price-card.recommended{margin-top:0;transform:none}
      .header-search{min-width:220px}
    }
    @media (max-width: 768px){
      .container-custom{width:min(100% - 28px, var(--container))}
      .notice-line .container-custom{align-items:flex-start;flex-direction:column;padding:8px 0}
      .navbar-custom{padding:10px 0}
      .navbar-collapse{
        padding:16px 0 4px;
      }
      .nav-main{
        padding:10px;
        border-radius:20px;
        background:#f7fbff;
        border:1px solid var(--border);
        margin-bottom:12px;
      }
      .nav-main .nav-link{margin-bottom:6px}
      .header-search{width:100%;min-width:0}
      .hero{padding:28px 0 36px}
      .hero-banner{border-radius:24px;min-height:auto}
      .hero-content{padding:30px 22px}
      .hero-points{grid-template-columns:1fr}
      .hero-stage{grid-template-columns:1fr;padding:0}
      .stage-grid,.topic-grid,.bubble-wall,.kpi-grid{grid-template-columns:1fr}
      .section-head{display:block}
      .section-desc{margin-top:14px}
      .news-item{grid-template-columns:1fr;gap:10px}
      .news-tag{width:max-content}
      .service-mosaic,.pricing-grid{grid-template-columns:1fr}
      .app-panel,.lead-card{padding:26px}
      .version-item{grid-template-columns:1fr;gap:12px}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{flex-direction:column}
    }
    @media (max-width: 520px){
      :root{--section:62px}
      .brand-text span:first-child{font-size:16px;max-width:210px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
      .brand-text span:last-child{display:none}
      .hero h1{font-size:38px}
      .hero-lead{font-size:16px}
      .hero-actions .btn-brand,.hero-actions .btn-ghost,.app-actions .btn-brand,.app-actions .btn-ghost{width:100%}
      .hero-content{padding:24px 18px}
      .stage-panel{padding:18px}
      .about-card,.topic-intro,.price-card,.lead-form{padding:22px}
      .section-title{font-size:28px}
      .app-panel h2,.lead-card h2{font-size:30px}
      .device-screen{min-height:260px}
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}