:root{
      --bg:#f6fbff;
      --panel:#ffffff;
      --panel2:#f1f8ff;
      --line:#d8e7f3;
      --text:#17324d;
      --muted:#5f748a;
      --brand:#1f7aec;
      --brand2:#14b8a6;
      --accent:#ffb347;
      --shadow:0 18px 50px rgba(25,68,120,.10);
      --radius:20px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:linear-gradient(180deg,#f8fcff 0%,#f3f9ff 42%,#ffffff 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:30;background:rgba(247,251,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(216,231,243,.9)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:5px}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end}
    .nav-links a{font-size:13px;color:var(--text);padding:9px 12px;border-radius:999px;transition:.2s;background:transparent}
    .nav-links a:hover,.nav-links a:focus{background:#e9f4ff;color:#0f5fb7}
    .nav-cta{display:flex;gap:10px;align-items:center}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:14px;padding:12px 16px;font-weight:700;cursor:pointer;transition:.22s ease;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#4ea0ff);color:#fff;box-shadow:0 12px 28px rgba(31,122,236,.23)}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .menu-toggle{display:none}
    .hero{padding:34px 0 18px;position:relative;overflow:hidden}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none}
    .hero::before{width:260px;height:260px;background:radial-gradient(circle,rgba(31,122,236,.16),transparent 68%);right:-60px;top:15px}
    .hero::after{width:220px;height:220px;background:radial-gradient(circle,rgba(20,184,166,.16),transparent 68%);left:-70px;bottom:5px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-side,.card,.panel,.faq-item,.review,.case,.compare,.form-wrap,.article,.step,.stat{background:rgba(255,255,255,.86);border:1px solid rgba(216,231,243,.9);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-copy{padding:32px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#e9f8f2;color:#0f7d66;border:1px solid #c9efe5;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{font-size:clamp(32px,4.7vw,58px);line-height:1.06;margin:16px 0 14px;letter-spacing:-.03em}
    .lead{font-size:17px;line-height:1.9;color:var(--muted);margin:0 0 20px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .hero-points .mini{padding:14px;border-radius:16px;background:linear-gradient(180deg,#f7fbff,#eef7ff);border:1px solid var(--line)}
    .mini strong{display:block;font-size:18px;margin-bottom:5px}
    .mini span{font-size:13px;color:var(--muted);line-height:1.6}
    .hero-side{padding:22px;display:grid;gap:14px}
    .hero-side .panel{padding:18px;background:linear-gradient(180deg,#f8fcff,#ffffff)}
    .panel h3,.section-title h2{margin:0 0 10px;font-size:24px}
    .panel p,.section-title p,.card p,.review p,.article p,.case p,.faq-item p,.form-wrap p{margin:0;color:var(--muted);line-height:1.8}
    .tag-cloud,.service-tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#f3f8ff;border:1px solid var(--line);font-size:13px;color:#26435d}
    section{padding:18px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .stat,.card,.review,.article,.case,.step{padding:20px}
    .stat strong{display:block;font-size:30px;margin-bottom:6px;color:#0d4f9c}
    .stat span{color:var(--muted);font-size:14px;line-height:1.6}
    .card h3,.step h3,.case h3,.review h3,.article h3{margin:0 0 10px;font-size:19px}
    .card ul,.case ul,.step ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.8}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eaf3ff;color:#0d5db1;font-size:12px;font-weight:700;margin-bottom:12px}
    .timeline{display:grid;gap:14px}
    .timeline-item{padding:18px 18px 18px 20px;border-left:4px solid #2f8cff;background:linear-gradient(180deg,#fff,#f8fcff);border-radius:0 16px 16px 0;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
    .compare{overflow:hidden}
    .table-wrap{overflow-x:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f4f9ff;font-size:14px}
    td{color:var(--muted);font-size:14px;line-height:1.7}
    .score{font-weight:800;color:#0b5fbf}
    details{border-top:1px solid var(--line);padding:15px 0}
    summary{cursor:pointer;list-style:none;font-weight:700;color:var(--text)}
    summary::-webkit-details-marker{display:none}
    .faq-item{padding:0 20px}
    .faq-item p{padding:10px 0 18px}
    .form-wrap{padding:24px}
    form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:grid;gap:8px;font-size:14px;font-weight:700;color:var(--text)}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 14px;font:inherit;color:var(--text);outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7db6ff;box-shadow:0 0 0 4px rgba(31,122,236,.10)}
    .footer-links,.footer-meta{display:flex;flex-wrap:wrap;gap:10px}
    footer{margin-top:18px;background:#10365f;color:#eff7ff}
    footer a{color:#fff}
    .footer-inner{padding:26px 0}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer-note{color:#d7e7fb;line-height:1.8}
    .floating{position:fixed;right:14px;bottom:14px;z-index:40;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#1f7aec,#16b8a5);color:#fff;box-shadow:0 14px 30px rgba(31,122,236,.25);font-weight:800}
    .backtop{position:fixed;right:14px;bottom:76px;z-index:40;display:none}
    .comment-bullets{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .quote{font-size:15px;line-height:1.8;color:var(--text)}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
    .image-strip{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .image-strip img,.square-image img{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .small{font-size:13px;color:var(--muted)}
    .anchor{scroll-margin-top:92px}
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.visible{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.split,.footer-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .section-title{align-items:start;flex-direction:column}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-only{display:block}
      .nav.open .nav-links{display:flex;position:absolute;left:0;right:0;top:100%;background:rgba(247,251,255,.98);padding:14px 16px;border-bottom:1px solid var(--line);box-shadow:0 18px 28px rgba(20,43,74,.08)}
      .nav{position:relative}
      .nav.open .nav-links a{background:#f4f9ff}
      .form-grid{grid-template-columns:1fr}
      .image-strip{grid-template-columns:1fr}
    }