:root{--bg:#f5fbf8;--bg2:#ecf8f1;--card:#ffffff;--line:#d9ebe2;--text:#173025;--muted:#5c7468;--brand:#2ea36f;--brand2:#58c59a;--accent:#e7f8ef;--shadow:0 10px 30px rgba(23,48,37,.08);--shadow2:0 14px 36px rgba(46,163,111,.16);--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,var(--bg),#fff 22%,#f8fcfa 70%,#f5fbf8);color:var(--text);line-height:1.7}
    a{color:inherit;text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(100% - 32px,var(--max));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(245,251,248,.88);backdrop-filter:blur(12px);border-bottom:1px solid rgba(217,235,226,.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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 6px 20px rgba(0,0,0,.05)}
    .brand strong{display:block;font-size:1.02rem;line-height:1.2}
    .brand span{display:block;font-size:.82rem;color:var(--muted)}
    .menu{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{font-size:.92rem;color:#355247;padding:8px 10px;border-radius:10px;transition:.2s}
    .menu a:hover{background:var(--accent);color:#143425}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:999px;border:1px solid transparent;font-weight:700;transition:.22s ease;cursor:pointer;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#46be86);color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-1px);filter:saturate(1.05)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#b5d9c7;transform:translateY(-1px)}
    .nav-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;width:44px;height:44px;align-items:center;justify-content:center}
    .hero{padding:42px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-panel{background:linear-gradient(135deg,#fff 0%,#f4fbf7 100%);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:28px;position:relative;overflow:hidden}
    .hero-panel::before,.hero-panel::after{content:"";position:absolute;border-radius:999px;background:rgba(46,163,111,.12);pointer-events:none}
    .hero-panel::before{width:220px;height:220px;right:-80px;top:-70px}
    .hero-panel::after{width:160px;height:160px;right:80px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#eefbf4;color:#22724a;border:1px solid #d2ecdf;padding:8px 12px;border-radius:999px;font-size:.86rem;font-weight:700}
    h1{font-size:clamp(2rem,4vw,3.4rem);line-height:1.08;margin:16px 0 14px}
    .lead{font-size:1.04rem;color:#355247;max-width:62ch}
    .hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
    .point{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;min-height:92px}
    .point strong{display:block;font-size:1.08rem;margin-bottom:4px}
    .point span{color:var(--muted);font-size:.92rem}
    .hero-side{display:grid;gap:16px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow)}
    .metric b{display:block;font-size:1.55rem;color:#0e2d21}
    .metric span{color:var(--muted);font-size:.9rem}
    .glass{background:linear-gradient(135deg,rgba(255,255,255,.92),rgba(234,247,240,.9));border:1px solid #d9ece3;border-radius:24px;padding:20px;box-shadow:var(--shadow)}
    .glass h3{margin:0 0 10px;font-size:1.05rem}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{background:#fff;border:1px solid #dbeae2;color:#274236;padding:8px 12px;border-radius:999px;font-size:.88rem}
    section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:1.6rem}
    .section-head p{margin:0;color:var(--muted);max-width:70ch}
    .card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .card,.table-wrap,.form-wrap,.faq-wrap,.review,.article,.timeline,.network,.compare{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:1.06rem}
    .card p{margin:0;color:var(--muted)}
    .pill{display:inline-block;background:#edf9f2;color:#1f6d46;border:1px solid #d5ecdf;padding:6px 10px;border-radius:999px;font-size:.82rem;margin-bottom:12px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
    .table-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid #edf3ef;text-align:left;vertical-align:top}
    th{background:#f6fbf8;color:#214031;font-size:.92rem}
    td{color:#355247}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f7fcf9);border:1px solid var(--line)}
    .step b{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:#dff4e8;color:#1f6d46;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:1.02rem}
    .step p{margin:0;color:var(--muted);font-size:.94rem}
    .faq-wrap details{border-top:1px solid #edf3ef;padding:16px 18px}
    .faq-wrap details:first-child{border-top:none}
    .faq-wrap summary{cursor:pointer;font-weight:700;color:#234131}
    .faq-wrap p{color:var(--muted);margin:10px 0 0}
    .reviews,.articles,.network-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{padding:18px}
    .review .name{font-weight:800}
    .review .role{font-size:.88rem;color:var(--muted);margin-bottom:10px}
    .article{padding:18px}
    .article time{color:#688175;font-size:.86rem}
    .article h3{margin:10px 0 8px;font-size:1.03rem}
    .article p{margin:0;color:var(--muted)}
    .form-wrap{padding:20px}
    form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .full{grid-column:1/-1}
    label{display:block;font-size:.92rem;font-weight:700;margin-bottom:7px;color:#2b4638}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #cfe2d7;background:#fff;color:var(--text);font:inherit;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8ecfb0;box-shadow:0 0 0 4px rgba(46,163,111,.1)}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    footer{padding:22px 0 34px;border-top:1px solid var(--line);margin-top:8px}
    .foot{background:#f9fcfa;border:1px solid var(--line);border-radius:24px;padding:20px;color:#294234}
    .links{display:flex;flex-wrap:wrap;gap:10px}
    .links a{padding:8px 12px;border:1px solid #d8eadf;border-radius:999px;background:#fff;color:#234131}
    .small{font-size:.9rem;color:#5a7468}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .floating a,.floating button{width:50px;height:50px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow2);background:linear-gradient(135deg,var(--brand),#4bc38a);color:#fff;cursor:pointer}
    .to-top{background:#fff;color:#235240;border:1px solid var(--line)}
    .mobile-menu{display:none}
    .subtle{color:var(--muted)}
    .compare{padding:20px}
    .badge-score{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
    .badge-score span{background:#eef9f3;border:1px solid #d7ecdf;padding:8px 12px;border-radius:999px}
    .network-grid .card{min-height:100%}
    @media (max-width: 980px){
      .hero-grid,.split,.card-grid,.steps,.reviews,.articles,.network-grid,.footer-top{grid-template-columns:1fr}
      .hero-points,.metric-grid{grid-template-columns:repeat(2,1fr)}
      .menu{display:none}.nav-toggle{display:inline-flex}
      .mobile-menu{display:none;padding:0 0 14px}.mobile-menu.open{display:block}
      .mobile-menu .links-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
      .mobile-menu a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;text-align:center}
      form{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(100% - 22px,var(--max))}
      .hero{padding-top:22px}.hero-panel{padding:20px}.hero-points,.metric-grid{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .mobile-menu .links-list{grid-template-columns:1fr}
      .brand strong{font-size:.98rem}
    }
    .reveal{opacity:0;transform:translateY(16px);transition:.7s ease}
    .reveal.in{opacity:1;transform:none}