:root{
      --bg:#f5f8fb;
      --bg2:#eef6fb;
      --card:#ffffff;
      --text:#173042;
      --muted:#5f7485;
      --line:#d9e6ef;
      --brand:#0ea5b7;
      --brand2:#2563eb;
      --brand3:#14b8a6;
      --shadow:0 18px 40px rgba(15, 42, 58, .08);
      --radius:20px;
      --radius-sm:14px;
      --max: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",Arial,sans-serif;background:linear-gradient(180deg,#f8fcff 0%,#f3f8fb 36%,#f6f9fc 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}
    .topbar{position:sticky;top:0;z-index:40;background:rgba(247,250,252,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(217,230,239,.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;box-shadow:0 6px 18px rgba(16,84,102,.08)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#29485a;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover{background:#e8f5f8;color:#0e6e7d}
    .nav-actions{display:flex;gap:10px;align-items:center}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.22s;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand2) 100%);color:#fff;box-shadow:0 12px 24px rgba(14,165,183,.22)}
    .btn-ghost{background:#fff;color:#184256;border:1px solid var(--line)}
    .btn:hover{transform:translateY(-1px);box-shadow:0 14px 26px rgba(20,72,98,.12)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:36px 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(20,184,166,.18),transparent 66%);right:-70px;top:10px}
    .hero::after{width:300px;height:300px;background:radial-gradient(circle,rgba(37,99,235,.12),transparent 64%);left:-110px;bottom:-120px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.timeline li,.stat,.compare,.price,.network,.tagbox,.testbox,.formbox{background:var(--card);border:1px solid rgba(217,230,239,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:32px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#eaf8f7;color:#0b6f7b;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{font-size:clamp(32px,4vw,52px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.02em}
    .lead{font-size:16px;line-height:1.8;color:var(--muted);margin:0 0 22px}
    .hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
    .mini{padding:14px;border-radius:16px;background:linear-gradient(180deg,#f8fbfe,#eef8fb);border:1px solid #dfeef3}
    .mini strong{display:block;font-size:18px;margin-bottom:6px}
    .mini span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .home-link{display:inline-flex;align-items:center;justify-content:center;padding:12px 14px;border-radius:14px;background:linear-gradient(135deg,#dff7f3,#e7f0ff);font-weight:700;color:#0f5e70}
    .side-card{padding:18px;border-radius:18px;background:linear-gradient(180deg,#f8fcff,#eef8fb);border:1px solid #dcebf1}
    .side-card h3{margin:0 0 10px;font-size:18px}
    .side-card p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .stats{padding:18px 0 8px}
    .stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .stat{padding:18px}
    .stat b{font-size:28px;display:block}
    .stat span{font-size:13px;color:var(--muted)}
    section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:720px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .card ul{margin:0;padding-left:18px}
    .tagbox{padding:18px}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tags span{padding:10px 12px;border-radius:999px;background:#f0f8fb;border:1px solid #dbeaf1;color:#215467;font-size:13px}
    .steps{counter-reset:step}
    .step{position:relative;padding-left:54px}
    .step::before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:24px;height:24px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 16px;border-bottom:1px solid #e9f0f4;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f3f9fc;color:#224255}
    .score{font-size:18px;font-weight:800;color:#0c7786}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:14px;border:0;background:transparent;padding:18px 20px;font-size:16px;font-weight:700;color:var(--text);cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 20px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{padding-bottom:18px;max-height:180px}
    .faq-q span{color:#0f6d7c}
    .reviews .review{padding:20px}
    .review .role{color:#0d7280;font-weight:700;font-size:13px;margin-bottom:10px}
    .review p{margin:0;color:var(--muted);line-height:1.8}
    .article{padding:18px}
    .article time{font-size:12px;color:#0f7080;font-weight:700}
    .article h3{margin:10px 0 8px;font-size:17px}
    .article a{color:#195f77;font-weight:700}
    .network{padding:18px}
    .network-list{display:flex;flex-wrap:wrap;gap:10px}
    .network-list a{padding:10px 12px;border-radius:12px;background:#f4fafc;border:1px solid #d8ebf3;color:#205468;font-size:13px}
    .formbox{padding:20px}
    form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:block;font-size:13px;font-weight:700;color:#27495b;margin-bottom:8px}
    input,select,textarea{width:100%;border:1px solid #cfe0e9;background:#fbfdff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .submit-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
    .foot{margin-top:12px;padding:24px 0 28px;background:#f1f7fb;border-top:1px solid #d9e6ef;color:#2b4a5e}
    .foot a{color:#1a6175}
    .footgrid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}
    .foot small,.foot p{color:#5f7485;line-height:1.8}
    .float{position:fixed;right:18px;bottom:18px;z-index:50;display:flex;flex-direction:column;gap:10px}
    .float a,.float button{border:0;box-shadow:0 12px 28px rgba(13,91,108,.18)}
    .backtop{background:#fff;color:#184256;border:1px solid var(--line);border-radius:999px;padding:12px 14px}
    .kefu{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-radius:999px;padding:12px 16px;font-weight:700}
    .panel{padding:18px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .compare{padding:18px}
    .note{font-size:13px;color:var(--muted)}
    @media (max-width: 960px){
      .hero-grid,.stat-grid,.grid-3,.grid-2,.footgrid,.split{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .nav-links{display:flex;position:absolute;left:16px;right:16px;top:68px;background:#fff;padding:14px;border:1px solid var(--line);border-radius:18px;flex-direction:column;align-items:flex-start;box-shadow:var(--shadow)}
      form{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
    }