*{margin:0;padding:0;box-sizing:border-box}
:root{--green:#22c55e;--green-d:#16a34a;--green-l:#86efac;--ink:#0f172a;--ink-2:#334155;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc;--card:#ffffff}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.sec{padding:80px 0}
.sec-alt{background:#fff}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--green-d);background:#dcfce7;padding:5px 14px;border-radius:20px;margin-bottom:16px}
h2.title{font-size:34px;font-weight:800;letter-spacing:-.5px;line-height:1.3;margin-bottom:14px}
.sub{color:var(--muted);font-size:16px;max-width:760px}
.center{text-align:center}
.center .sub{margin:0 auto}
/* nav */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo-wrap{display:flex;align-items:center;gap:10px}
.ai-page-logo{max-width:130px;height:38px;object-fit:contain}
.nav-links{display:flex;align-items:center;gap:0;list-style:none}
.nav-links a{padding:8px 12px;font-size:14.5px;font-weight:500;color:var(--ink-2);border-radius:8px;transition:.2s}
.nav-links a:hover{color:var(--green-d);background:#f0fdf4}
.nav-cta{display:flex;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:.22s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--green),var(--green-d));color:#fff;box-shadow:0 6px 18px rgba(34,197,94,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(34,197,94,.42)}
.btn-ghost{background:#fff;color:var(--green-d);border:1.5px solid var(--green-l)}
.btn-ghost:hover{background:#f0fdf4}
.menu-toggle{display:none;background:none;border:none;font-size:24px;color:var(--ink);cursor:pointer;padding:4px 8px}
/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 85% 15%,#dcfce7 0%,transparent 45%),radial-gradient(circle at 10% 80%,#d1fae5 0%,transparent 40%),linear-gradient(180deg,#f0fdf4,#f8fafc);padding:76px 0 84px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;position:relative;z-index:2}
.hero-deco{position:absolute;inset:0;z-index:1;pointer-events:none}
.hero-blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.45}
.hero-blob.b1{width:340px;height:340px;background:#86efac;top:-80px;right:6%}
.hero-blob.b2{width:260px;height:260px;background:#34d399;bottom:-60px;left:-40px;opacity:.28}
.hero-grid-line{position:absolute;inset:0;background-image:linear-gradient(#22c55e10 1px,transparent 1px),linear-gradient(90deg,#22c55e10 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%)}
.hero h1{font-size:46px;line-height:1.18;font-weight:900;letter-spacing:-1px;margin-bottom:20px}
.hero h1 .hl{color:var(--green-d);position:relative}
.hero h1 .hl::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:10px;background:#bbf7d0;z-index:-1;border-radius:4px}
.hero-lead{font-size:17.5px;color:var(--ink-2);max-width:580px;margin-bottom:28px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px}
.hero-tags span{font-size:13px;color:var(--green-d);background:#fff;border:1px solid var(--green-l);padding:5px 12px;border-radius:20px;font-weight:500}
.hero-panel{background:rgba(255,255,255,.72);border:1px solid #d1fae5;border-radius:22px;padding:22px;box-shadow:0 24px 60px rgba(16,185,129,.14);backdrop-filter:blur(8px)}
.hero-panel h3{font-size:15px;color:var(--ink-2);font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px #dcfce7}
.mini-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mini-stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.mini-stat b{display:block;font-size:24px;font-weight:800;color:var(--green-d);line-height:1.1}
.mini-stat small{font-size:12.5px;color:var(--muted)}
/* stats bar */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-46px;position:relative;z-index:5}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px 22px;text-align:center;box-shadow:0 12px 30px rgba(15,23,42,.06);transition:.25s}
.stat-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(34,197,94,.16);border-color:var(--green-l)}
.stat-card b{display:block;font-size:34px;font-weight:900;color:var(--green-d);letter-spacing:-1px}
.stat-card span{font-size:14px;color:var(--muted)}
/* grids */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(15,23,42,.09);border-color:var(--green-l)}
.card .ico{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,#dcfce7,#bbf7d0);color:var(--green-d);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--muted)}
/* flow */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.step{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 18px;position:relative;transition:.25s}
.step:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(34,197,94,.14)}
.step .num{width:34px;height:34px;border-radius:50%;background:var(--green);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;margin-bottom:14px}
.step h4{font-size:16px;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--muted)}
/* table */
.table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:#fff}
table{width:100%;border-collapse:collapse;min-width:720px}
th,td{padding:15px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
th{background:#f0fdf4;color:var(--green-d);font-weight:700;font-size:14px}
td.win{color:var(--green-d);font-weight:700}
tr:last-child td{border-bottom:none}
tr:hover td{background:#f8fafc}
/* rating */
.rating-card{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;align-items:center;background:linear-gradient(135deg,#0f172a,#1e293b);border-radius:22px;padding:36px;color:#fff;margin-bottom:28px}
.rating-score{text-align:center}
.rating-score .big{font-size:64px;font-weight:900;color:var(--green-l);line-height:1;letter-spacing:-2px}
.rating-score .stars{font-size:22px;color:#fbbf24;letter-spacing:3px;margin:10px 0}
.rating-score small{color:#94a3b8;font-size:14px}
.rating-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.rating-list div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:12px 14px;font-size:13.5px;color:#e2e8f0}
/* faq */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:.2s}
.faq-item.open{border-color:var(--green-l);box-shadow:0 10px 26px rgba(34,197,94,.1)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;cursor:pointer;font-weight:600;font-size:15.5px}
.faq-q .pm{font-size:22px;color:var(--green-d);transition:.25s;flex:none}
.faq-item.open .pm{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--muted);font-size:14.5px}
.faq-a p{padding:0 22px 20px}
/* reviews */
.review{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;transition:.25s}
.review:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(15,23,42,.09)}
.review .stars{color:#fbbf24;font-size:15px;margin-bottom:12px;letter-spacing:2px}
.review p{font-size:14.5px;color:var(--ink-2);margin-bottom:18px}
.review .who{display:flex;align-items:center;gap:12px}
.review .av{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#22c55e,#16a34a);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex:none}
.review .who b{display:block;font-size:14.5px}
.review .who small{color:var(--muted);font-size:12.5px}
/* cases */
.case-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:.25s}
.case-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(15,23,42,.1)}
.case-card .thumb{aspect-ratio:16/9;overflow:hidden;background:#f0fdf4}
.case-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.4s}
.case-card:hover .thumb img{transform:scale(1.04)}
.case-card .body{padding:20px}
.case-card h3{font-size:17px;margin-bottom:8px}
.case-card p{font-size:14px;color:var(--muted)}
.sq-img{aspect-ratio:1/1}
/* articles */
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.article-col{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}
.article-col h3{font-size:16px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.article-col h3::before{content:"";width:4px;height:16px;background:var(--green);border-radius:2px}
.article-col ul{list-style:none}
.article-col li{margin-bottom:10px}
.article-col a{font-size:14.5px;color:var(--ink-2);display:flex;align-items:center;gap:8px;transition:.2s}
.article-col a:hover{color:var(--green-d)}
.article-col a::before{content:"›";color:var(--green);font-weight:700}
/* tags */
.tagcloud{display:flex;flex-wrap:wrap;gap:10px}
.tagcloud a{font-size:13.5px;background:#f0fdf4;color:var(--green-d);border:1px solid #bbf7d0;padding:7px 14px;border-radius:20px;transition:.2s}
.tagcloud a:hover{background:var(--green);color:#fff;border-color:var(--green);transform:translateY(-2px)}
/* form */
.form-box{background:#fff;border:1px solid var(--line);border-radius:20px;padding:34px;box-shadow:0 16px 40px rgba(15,23,42,.06)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:600;color:var(--ink-2)}
.field input,.field select,.field textarea{padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;font-family:inherit;background:#f8fafc;transition:.2s;width:100%}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--green);background:#fff;box-shadow:0 0 0 3px #dcfce7}
.field textarea{resize:vertical;min-height:110px}
.form-msg{font-size:14px;margin-top:14px;color:var(--green-d);display:none}
/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.contact-info{display:grid;gap:14px}
.contact-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;display:flex;gap:14px;align-items:center}
.contact-item .ico{width:42px;height:42px;border-radius:10px;background:#f0fdf4;color:var(--green-d);display:flex;align-items:center;justify-content:center;font-size:20px;flex:none}
.contact-item b{font-size:14px;display:block}
.contact-item small{color:var(--muted);font-size:13px;word-break:break-all}
.qr-wrap{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;text-align:center}
.qr-wrap img{width:150px;margin:0 auto 12px;border-radius:8px}
.qr-wrap small{color:var(--muted);font-size:13px}
/* network / timeline */
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(#22c55e,#bbf7d0)}
.tl-item{position:relative;margin-bottom:24px}
.tl-item::before{content:"";position:absolute;left:-24px;top:5px;width:12px;height:12px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px #dcfce7}
.tl-item h4{font-size:16px;margin-bottom:4px}
.tl-item p{font-size:14px;color:var(--muted)}
/* price */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.price-card{background:#fff;border:1.5px solid var(--line);border-radius:18px;padding:30px 26px;transition:.25s;position:relative}
.price-card:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(34,197,94,.16);border-color:var(--green-l)}
.price-card.featured{border-color:var(--green);box-shadow:0 20px 44px rgba(34,197,94,.18)}
.price-card .badge{position:absolute;top:-13px;right:22px;background:var(--green);color:#fff;font-size:12px;padding:4px 12px;border-radius:12px;font-weight:600}
.price-card h3{font-size:18px;margin-bottom:12px}
.price-card .amt{font-size:38px;font-weight:900;color:var(--green-d);letter-spacing:-1px}
.price-card .amt small{font-size:14px;color:var(--muted);font-weight:500}
.price-card ul{list-style:none;margin:18px 0 22px}
.price-card li{font-size:14px;color:var(--ink-2);padding:6px 0;display:flex;gap:8px}
.price-card li::before{content:"✓";color:var(--green-d);font-weight:700}
/* footer */
footer{background:#0f172a;color:#cbd5e1;padding:60px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:40px}
.foot-brand p{font-size:14px;color:#94a3b8;margin:16px 0}
.foot-brand .ai-page-logo{filter:brightness(0) invert(1);height:36px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.foot-col ul{list-style:none}
.foot-col li{margin-bottom:10px}
.foot-col a{font-size:13.5px;color:#94a3b8;transition:.2s}
.foot-col a:hover{color:var(--green-l)}
.foot-bottom{border-top:1px solid #1e293b;padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#64748b}
/* float */
.float-btn{position:fixed;right:22px;bottom:28px;z-index:200;display:flex;flex-direction:column;gap:12px}
.float-btn a,.float-btn button{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--green),var(--green-d));color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;box-shadow:0 8px 22px rgba(34,197,94,.4);border:none;cursor:pointer;transition:.25s}
.float-btn a:hover,.float-btn button:hover{transform:translateY(-3px) scale(1.05)}
.float-btn .top{background:#0f172a;box-shadow:0 8px 22px rgba(15,23,42,.3);opacity:0;pointer-events:none}
.float-btn .top.show{opacity:1;pointer-events:auto}
/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
/* responsive */
@media(max-width:980px){
.hero-grid{grid-template-columns:1fr}
.hero h1{font-size:36px}
.stats{grid-template-columns:1fr 1fr;margin-top:36px}
.grid-3{grid-template-columns:1fr 1fr}
.flow{grid-template-columns:1fr 1fr}
.rating-card{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr 1fr}
.price-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.article-list{grid-template-columns:1fr}
}
@media(max-width:760px){
.nav-links{position:fixed;top:66px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 16px;border-bottom:1px solid var(--line);box-shadow:0 12px 30px rgba(15,23,42,.1);transform:translateY(-150%);transition:transform .3s ease;max-height:70vh;overflow-y:auto}
.nav-links.show{transform:translateY(0)}
.nav-links a{padding:12px 10px;border-bottom:1px solid #f1f5f9}
.menu-toggle{display:block}
.nav-cta .btn-ghost{display:none}
.hero h1{font-size:30px}
h2.title{font-size:26px}
.sec{padding:56px 0}
.grid-3,.grid-2,.flow{grid-template-columns:1fr}
.stats{grid-template-columns:1fr 1fr}
.rating-list{grid-template-columns:1fr}
.form-grid{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr}
.mini-stats{grid-template-columns:1fr 1fr}
}
@media(max-width:460px){
.hero-btns .btn{width:100%}
.stats{grid-template-columns:1fr}
.hero h1{font-size:26px}
}