:root{--ink:#17211d;--muted:#5d6b64;--paper:#f7f4ed;--card:#fffdf8;--green:#0b6b4f;--lime:#d9f36a;--line:#d9ded8;--dark:#10231c;--shadow:0 16px 45px rgba(27,45,37,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.75 "Segoe UI","Microsoft YaHei",sans-serif}a{color:inherit}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.top{position:sticky;top:0;z-index:20;background:rgba(247,244,237,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{height:72px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;text-decoration:none}.brand img{width:38px;height:38px;border-radius:10px}.links{display:flex;gap:22px;margin-left:auto}.links a,.btn{text-decoration:none}.links a:hover{color:var(--green)}.nav-cta{padding:9px 16px;background:var(--dark);color:white;border-radius:10px}.menu{display:none;margin-left:auto;border:0;background:none;font-size:26px}.hero{padding:78px 0 56px}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:64px}.eyebrow{display:inline-block;padding:6px 11px;border:1px solid #a9bcaf;border-radius:99px;color:var(--green);font-size:14px;font-weight:700}.hero h1{font-size:clamp(42px,6vw,70px);line-height:1.05;letter-spacing:-2px;margin:22px 0}.lead{font-size:20px;color:var(--muted);max-width:680px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}.btn{display:inline-flex;padding:12px 20px;border-radius:10px;font-weight:750;border:1px solid var(--dark)}.btn.primary{background:var(--green);border-color:var(--green);color:white}.btn:hover{transform:translateY(-1px)}.facts{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:14px}.hero-art{position:relative}.hero-art img{display:block;width:100%;height:auto;border-radius:24px;box-shadow:var(--shadow)}.hero-art:after{content:"安全 · 清晰 · 可验证";position:absolute;right:-12px;bottom:-18px;background:var(--lime);padding:10px 16px;border-radius:9px;font-weight:800}.section{padding:72px 0}.section.alt{background:#eef1ea;border-block:1px solid var(--line)}.kicker{color:var(--green);text-transform:uppercase;letter-spacing:2px;font-size:13px;font-weight:800}.section h2,.article h2{font-size:clamp(29px,4vw,42px);line-height:1.2;margin:8px 0 18px}.section-head{max-width:720px;margin-bottom:32px}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:25px;box-shadow:0 5px 20px rgba(30,45,38,.04)}.card h3{margin:8px 0;font-size:21px}.card p{color:var(--muted);margin:0}.icon{width:42px;height:42px;display:grid;place-items:center;background:var(--lime);border-radius:12px;font-weight:900}.text-link{color:var(--green);font-weight:750}.toc{background:var(--dark);color:white;border-radius:16px;padding:24px 28px}.toc a{color:#d7e8df}.toc ol{columns:2;margin-bottom:0}.article-head{padding:64px 0 34px}.article-head h1{font-size:clamp(38px,5vw,58px);line-height:1.1;margin:14px 0}.article{width:min(850px,calc(100% - 40px));margin:auto;padding:10px 0 80px}.article h2{margin-top:54px}.article h3{font-size:23px;margin-top:34px}.article p,.article li{color:#435149}.note{border-left:5px solid var(--green);background:#e8f0e8;padding:16px 20px;border-radius:0 10px 10px 0}.steps{counter-reset:step;display:grid;gap:14px}.step{position:relative;padding:18px 20px 18px 70px;background:white;border:1px solid var(--line);border-radius:12px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:34px;height:34px;background:var(--lime);display:grid;place-items:center;border-radius:50%;font-weight:900}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;background:white}th,td{border:1px solid var(--line);padding:12px;text-align:left}th{background:#edf0e9}.faq details{background:white;border:1px solid var(--line);border-radius:12px;padding:16px 19px;margin:10px 0}.faq summary{cursor:pointer;font-weight:800}.cta{background:var(--green);color:white;border-radius:22px;padding:45px;text-align:center}.cta h2{margin-top:0}.footer{background:var(--dark);color:#cfdbd4;padding:55px 0 25px}.foot-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}.footer h3{color:white;font-size:16px}.footer a{display:block;text-decoration:none;margin:7px 0}.legal{border-top:1px solid #365047;margin-top:38px;padding-top:20px;font-size:13px;color:#9fb0a8}.platform{font-size:28px;font-weight:900}.badge{display:inline-block;background:#e7eadf;padding:4px 9px;border-radius:6px;font-size:13px}
@media(max-width:800px){.links{display:none;position:absolute;left:0;right:0;top:72px;background:var(--paper);padding:20px;flex-direction:column;border-bottom:1px solid var(--line)}.links.open{display:flex}.menu{display:block}.hero-grid{grid-template-columns:1fr}.grid-2,.grid-3,.grid-4,.foot-grid{grid-template-columns:1fr 1fr}.toc ol{columns:1}.hero{padding-top:50px}}
@media(max-width:520px){.wrap,.article{width:min(100% - 28px,1120px)}.grid-2,.grid-3,.grid-4,.foot-grid{grid-template-columns:1fr}.hero h1{font-size:42px}.section{padding:52px 0}.hero-art:after{right:4px}.cta{padding:30px 18px}}