:root{
      --bg:#f6f8fb;
      --panel:#ffffff;
      --panel2:#f2f7ff;
      --text:#163048;
      --muted:#5f7286;
      --line:#dbe6f2;
      --brand:#1f7ae0;
      --brand2:#3dd6c6;
      --accent:#ffb347;
      --shadow:0 14px 34px rgba(16,54,92,.08);
      --shadow2:0 10px 24px rgba(31,122,224,.14);
      --radius:18px;
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at top left, rgba(61,214,198,.14), transparent 28%),
      radial-gradient(circle at top right, rgba(31,122,224,.13), transparent 24%),
      linear-gradient(180deg,#fbfdff 0%, #f6f8fb 36%, #f6f8fb 100%);
      color:var(--text);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:40;background:rgba(251,253,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,230,242,.8)}
    .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:10px;background:#fff;padding:4px;box-shadow:0 8px 22px rgba(31,122,224,.12)}
    .brand strong{display:block;font-size:1rem;line-height:1.1}
    .brand span{display:block;font-size:.82rem;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
    .nav-links a{font-size:.94rem;color:var(--muted);padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover{color:var(--text);background:#edf5ff}
    .nav-cta{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;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#1558bc);color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 30px rgba(31,122,224,.2)}
    .btn-light{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-light:hover{border-color:#bfd3ea;transform:translateY(-1px)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:44px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.faq-item,.review,.article,.form-card,.compare,.price-card,.step,.service-card,.case-card,.info-card{background:var(--panel);border:1px solid rgba(219,230,242,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero-main:before{width:260px;height:260px;background:radial-gradient(circle, rgba(61,214,198,.18), transparent 68%);right:-70px;top:-70px}
    .hero-main:after{width:220px;height:220px;background:radial-gradient(circle, rgba(31,122,224,.18), transparent 70%);left:-70px;bottom:-90px}
    .badge{display:inline-flex;align-items:center;gap:8px;background:#edf7ff;color:#1557ae;border:1px solid #d6e9ff;border-radius:999px;padding:8px 14px;font-size:.92rem;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(2rem,4vw,3.6rem);line-height:1.1;letter-spacing:-.03em}
    .lead{font-size:1.06rem;color:var(--muted);max-width:60ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0 20px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini{padding:14px;border-radius:16px;background:linear-gradient(180deg,#f8fbff,#eef6ff);border:1px solid #dfeafa}
    .mini b{display:block;font-size:1.1rem}
    .mini span{display:block;color:var(--muted);font-size:.9rem}
    .hero-side{padding:22px}
    .side-top{display:grid;gap:14px}
    .side-box{padding:16px;border-radius:16px;background:linear-gradient(135deg,#f7fbff,#eef8ff);border:1px solid #dbeaf8}
    .side-box strong{display:block;font-size:1rem;margin-bottom:6px}
    .side-box p{margin:0;color:var(--muted);font-size:.94rem}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:1.55rem}
    .section-head p{margin:0;color:var(--muted)}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .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}
    .info-card,.service-card,.case-card,.review,.article,.step,.price-card,.compare,.form-card,.faq-item{padding:20px}
    .kpi{font-size:1.7rem;font-weight:800;color:#0d4ea5}
    .tag-cloud{display:flex;gap:10px;flex-wrap:wrap}
    .tag{padding:8px 12px;border-radius:999px;background:#fff7e9;border:1px solid #ffe1ab;color:#965b00;font-size:.92rem}
    .service-card h3,.case-card h3,.step h3,.price-card h3,.review h3,.article h3,.form-card h3{margin:0 0 10px;font-size:1.05rem}
    .service-card p,.case-card p,.step p,.price-card p,.review p,.article p,.form-card p{margin:0;color:var(--muted)}
    .service-card ul,.case-card ul,.compare ul{margin:12px 0 0;padding-left:18px;color:var(--text)}
    .service-card li,.case-card li{margin:7px 0}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{position:relative}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand2),var(--brand));color:#fff;font-weight:800;margin-bottom:12px}
    .compare-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{border-bottom:1px solid var(--line);padding:14px 12px;text-align:left;vertical-align:top}
    th{background:#f3f8ff;font-size:.95rem}
    .score{font-weight:800;color:#0d4ea5}
    .faq{display:grid;gap:12px}
    .faq-item summary{list-style:none;cursor:pointer;font-weight:700}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item p{margin:12px 0 0;color:var(--muted)}
    .review small{color:#7a8da0}
    .stars{color:#f3b62b;font-size:1.05rem;letter-spacing:2px}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .form-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    label{display:grid;gap:7px;font-size:.95rem;font-weight:700}
    input,select,textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px 14px;font:inherit;color:var(--text);outline:none}
    input:focus,select:focus,textarea:focus{border-color:#8ec0ff;box-shadow:0 0 0 4px rgba(31,122,224,.09)}
    textarea{min-height:120px;resize:vertical}
    .footer{margin-top:18px;background:#0f2340;color:#d8e6f5;padding:28px 0 18px}
    .footer a{color:#fff}
    .footer .muted{color:#b4c6d8}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.08)}
    .float-box{position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px}
    .float-btn{background:linear-gradient(135deg,#1f7ae0,#1558bc);color:#fff;border-radius:999px;padding:12px 14px;box-shadow:var(--shadow2);display:inline-flex;align-items:center;gap:8px;font-weight:700}
    .float-btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .mobile-only{display:none}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    .subtle{color:var(--muted)}
    .divider{height:1px;background:var(--line);margin:16px 0}
    .table-note{margin-top:10px;color:var(--muted);font-size:.92rem}
    @media (max-width: 1080px){
      .hero-grid,.form-grid,.footer-top,.grid-4,.grid-3,.articles,.grid-2,.timeline{grid-template-columns:1fr 1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .desktop-only{display:none}
      .mobile-only{display:block}
    }
    @media (max-width: 720px){
      .container{width:min(var(--max), calc(100% - 22px))}
      .hero-main{padding:22px}
      .hero-points,.grid-4,.grid-3,.articles,.grid-2,.timeline,.hero-grid,.form-grid,.footer-top{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:start}
      .nav{padding:12px 0}
      .brand span{display:none}
      .float-box{left:12px;right:12px;bottom:12px;grid-template-columns:1fr 1fr}
      .float-btn{justify-content:center}
      .mobile-nav{display:none;padding:0 0 14px}
      .mobile-nav.open{display:grid;gap:8px}
      .mobile-nav a{padding:10px 12px;border-radius:12px;background:#fff;border:1px solid var(--line);color:var(--text)}
    }