:root{
      --bg:#eff6ff;
      --bg2:#f9fbff;
      --card:#ffffff;
      --ink:#112238;
      --muted:#5d6b84;
      --line:#d9e4f4;
      --brand:#2563eb;
      --brand2:#7c3aed;
      --accent:#00d4ff;
      --accent2:#22c55e;
      --shadow:0 20px 60px rgba(27, 56, 115, .12);
      --shadow2:0 10px 24px rgba(45, 93, 177, .10);
      --radius:22px;
      --radius2:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at 20% 0%, rgba(0,212,255,.12), transparent 26%),
      radial-gradient(circle at 80% 8%, rgba(124,58,237,.12), transparent 24%),
      linear-gradient(180deg, #f7fbff 0%, #edf5ff 48%, #f6f9ff 100%);
      color:var(--ink);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(calc(100% - 32px), var(--container));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:40;background:rgba(245,250,255,.82);backdrop-filter:blur(16px);border-bottom:1px solid rgba(217,228,244,.9)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain}
    .brand strong{display:block;font-size:1.02rem;line-height:1.15}
    .brand span{display:block;font-size:.86rem;color:var(--muted)}
    .menu{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{font-size:.95rem;color:#27405e;padding:8px 10px;border-radius:999px;transition:.25s ease}
    .menu a:hover,.menu a:focus-visible{background:rgba(37,99,235,.08);color:#163b78;outline:none}
    .nav-tools{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 18px;font-weight:700;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 10px 24px rgba(37,99,235,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(37,99,235,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
    .btn-ghost:hover{border-color:#b4c6e8;transform:translateY(-2px)}
    .mobile-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;width:46px;height:46px;align-items:center;justify-content:center}
    .mobile-toggle span{display:block;width:20px;height:2px;background:#2c4365;position:relative}
    .mobile-toggle span::before,.mobile-toggle span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:#2c4365}
    .mobile-toggle span::before{top:-6px}.mobile-toggle span::after{top:6px}
    .hero{padding:54px 0 30px}
    .hero-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:24px;align-items:stretch}
    .hero-main,.hero-side{border:1px solid rgba(217,228,244,.92);background:linear-gradient(180deg,rgba(255,255,255,.95),rgba(245,250,255,.88));border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px}
    .kicker{display:inline-flex;align-items:center;gap:8px;color:#0f4aa9;background:rgba(37,99,235,.08);border:1px solid rgba(37,99,235,.12);padding:7px 12px;border-radius:999px;font-size:.9rem;font-weight:700}
    h1{margin:14px 0 12px;font-size:clamp(2rem,4vw,3.6rem);line-height:1.08;letter-spacing:-.03em}
    .lead{font-size:1.05rem;color:var(--muted);max-width:58ch;margin:0 0 22px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .point{padding:14px;border-radius:18px;background:#f8fbff;border:1px solid var(--line)}
    .point b{display:block;font-size:1.02rem}.point span{display:block;color:var(--muted);font-size:.92rem}
    .hero-side{padding:20px;display:grid;gap:14px}
    .hero-stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#edf4ff);border:1px solid var(--line)}
    .hero-stat strong{font-size:1.5rem;display:block}.hero-stat p{margin:6px 0 0;color:var(--muted)}
    .hero-badge-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .badge-card{padding:15px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow2)}
    .badge-card h3{margin:0 0 6px;font-size:1rem}.badge-card p{margin:0;color:var(--muted);font-size:.92rem}
    main{padding:14px 0 28px}
    section{scroll-margin-top:96px}
    .section{padding:26px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:clamp(1.45rem,2.4vw,2.15rem)}
    .section-head p{margin:0;color:var(--muted);max-width:62ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:var(--radius2);box-shadow:var(--shadow2);padding:20px;transition:.25s ease}
    .card:hover{transform:translateY(-4px);box-shadow:0 16px 28px rgba(27,56,115,.14)}
    .card h3{margin:0 0 10px;font-size:1.12rem}
    .card p,.card li{color:var(--muted)}
    .icon-dot{width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(37,99,235,.14),rgba(124,58,237,.14));color:#163b78;font-weight:800;margin-bottom:12px}
    .pill-list{display:flex;flex-wrap:wrap;gap:10px}
    .pill{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.92rem;color:#24415f}
    .comparison{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #e8eef8;vertical-align:top}
    th{background:#f4f8ff;font-size:.96rem;color:#17345b}
    .rating{display:flex;gap:4px;color:#f59e0b;font-size:1.05rem}
    .timeline{display:grid;gap:12px}
    .step{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .step-num{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2))}
    .case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .case-item{overflow:hidden}
    .case-media{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}
    .case-media img{border-radius:16px;border:1px solid var(--line);background:#f7fbff}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;color:var(--muted);font-size:.92rem}
    .price-box{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price{padding:18px;border-radius:20px;background:linear-gradient(180deg,#ffffff,#f5f9ff);border:1px solid var(--line)}
    .price strong{font-size:1.55rem;display:block}
    .accordion{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow2);overflow:hidden}
    summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700;color:#17345b}
    summary::-webkit-details-marker{display:none}
    details .faq-body{padding:0 18px 16px;color:var(--muted)}
    .form-wrap{display:grid;grid-template-columns:1fr .85fr;gap:16px}
    form{display:grid;gap:12px}
    label{display:grid;gap:8px;font-weight:700;color:#203955}
    input,select,textarea{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--ink);font:inherit;outline:none;transition:.2s ease}
    input:focus,select:focus,textarea:focus{border-color:#7aa9ff;box-shadow:0 0 0 4px rgba(59,130,246,.12)}
    textarea{min-height:120px;resize:vertical}
    .footer{padding:18px 0 28px;border-top:1px solid rgba(217,228,244,.9);background:rgba(248,251,255,.82)}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:16px}
    .small{font-size:.92rem;color:var(--muted)}
    .link-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .link-cloud a{padding:9px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#284868}
    .floating{position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px}
    .floating a,.floating button{width:52px;height:52px;border-radius:16px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;box-shadow:var(--shadow2);cursor:pointer}
    .floating button{color:#17345b;font-size:1.1rem}
    .backtop{opacity:0;pointer-events:none;transform:translateY(8px);transition:.25s ease}
    .backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .mobile-panel{display:none}
    .fade-up{opacity:0;transform:translateY(16px);transition:opacity .6s ease, transform .6s ease}
    .fade-up.show{opacity:1;transform:translateY(0)}
    .sticky-cta{display:flex;gap:10px;flex-wrap:wrap}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.reviews,.case-grid,.grid-2,.form-wrap,.footer-grid,.price-box{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .menu,.nav-tools .btn-ghost{display:none}
      .mobile-toggle{display:inline-flex}
      .mobile-panel{display:none;padding:0 0 14px}
      .mobile-panel.show{display:block}
      .mobile-panel .menu{display:grid;justify-content:stretch;gap:8px;padding:10px 0 2px}
      .mobile-panel .menu a{background:#fff;border:1px solid var(--line);padding:11px 14px}
      .section-head{align-items:flex-start;flex-direction:column}
      table{min-width:760px}
    }