*{margin:0;padding:0;box-sizing:border-box}
:root{
--mint:#3ec9a7;
--mint-deep:#22a381;
--mint-light:#e7faf4;
--mint-soft:#f2fdf9;
--ink:#16302b;
--ink-2:#3a554f;
--ink-3:#6b827c;
--line:#dcefe8;
--white:#ffffff;
--shadow-sm:0 2px 10px rgba(34,163,129,.08);
--shadow-md:0 8px 30px rgba(34,163,129,.12);
--shadow-lg:0 18px 50px rgba(22,48,43,.14);
--radius:16px;
}
html{scroll-behavior:smooth}
body{
font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
color:var(--ink);background:var(--white);line-height:1.7;font-size:16px;
-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:88px 0;scroll-margin-top:80px}
.sec-head{max-width:780px;margin:0 auto 52px;text-align:center}
.sec-tag{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--mint-deep);background:var(--mint-light);padding:6px 16px;border-radius:999px;font-weight:600;margin-bottom:16px}
.sec-title{font-size:34px;font-weight:800;letter-spacing:.5px;color:var(--ink);line-height:1.3;margin-bottom:14px}
.sec-desc{font-size:16px;color:var(--ink-3);line-height:1.8}

/* 导航 */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand .ai-page-logo{max-height:38px;width:auto}
.brand-name{font-weight:800;font-size:18px;color:var(--ink);letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap}
.nav-links a{font-size:14.5px;color:var(--ink-2);font-weight:500;padding:8px 11px;border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--mint-deep);background:var(--mint-soft)}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border:none;cursor:pointer;border-radius:10px;transition:all .25s;text-align:center;font-size:15px;padding:11px 22px}
.btn-primary{background:linear-gradient(135deg,var(--mint),var(--mint-deep));color:#fff;box-shadow:0 6px 18px rgba(34,163,129,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(34,163,129,.4)}
.btn-ghost{background:#fff;color:var(--mint-deep);border:1.5px solid var(--mint);}
.btn-ghost:hover{background:var(--mint-light);transform:translateY(-2px)}
.btn-lg{padding:15px 34px;font-size:16.5px;border-radius:12px}
.nav-toggle{display:none;width:44px;height:44px;border:none;background:var(--mint-light);border-radius:10px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--mint-deep);border-radius:2px;transition:.3s}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Hero 无图 */
.hero{position:relative;overflow:hidden;background:
radial-gradient(1000px 500px at 85% -10%,rgba(62,201,167,.18),transparent 60%),
radial-gradient(800px 500px at 5% 110%,rgba(34,163,129,.14),transparent 60%),
linear-gradient(180deg,#f6fdfa 0%,#eafaf3 100%);
padding:96px 0 100px}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(34,163,129,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(34,163,129,.05) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(circle at 50% 40%,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(circle at 50% 40%,#000 30%,transparent 75%);pointer-events:none}
.hero-inner{position:relative;z-index:2;text-align:center;max-width:900px;margin:0 auto}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);color:var(--mint-deep);font-size:13.5px;font-weight:600;padding:8px 18px;border-radius:999px;box-shadow:var(--shadow-sm);margin-bottom:26px}
.hero-badge .dot{width:8px;height:8px;background:var(--mint);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(62,201,167,.5)}50%{box-shadow:0 0 0 7px rgba(62,201,167,0)}}
.hero h1{font-size:50px;line-height:1.2;font-weight:800;letter-spacing:1px;color:var(--ink);margin-bottom:22px}
.hero h1 .grad{background:linear-gradient(120deg,var(--mint),var(--mint-deep));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:18px;color:var(--ink-2);line-height:1.85;max-width:720px;margin:0 auto 34px}
.hero-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-bottom:44px}
.hero-kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:860px;margin:0 auto}
.kpi{background:rgba(255,255,255,.85);border:1px solid var(--line);border-radius:14px;padding:20px 12px;box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s}
.kpi:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.kpi .num{font-size:28px;font-weight:800;color:var(--mint-deep);line-height:1.2;letter-spacing:.5px}
.kpi .num small{font-size:15px;font-weight:700}
.kpi .lbl{font-size:13px;color:var(--ink-3);margin-top:6px}
.hero-models{position:relative;z-index:2;margin-top:46px;display:flex;flex-wrap:wrap;justify-content:center;gap:9px;max-width:880px;margin-left:auto;margin-right:auto}
.hero-models span{font-size:12.5px;color:var(--mint-deep);background:#fff;border:1px solid var(--line);padding:6px 13px;border-radius:999px;font-weight:500}

/* 关于我们 */
.about{background:#fff}
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.about-text h2{font-size:32px;font-weight:800;margin-bottom:20px;line-height:1.3}
.about-text p{color:var(--ink-2);margin-bottom:16px;font-size:15.5px}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.point{display:flex;gap:12px;align-items:flex-start;background:var(--mint-soft);border:1px solid var(--line);padding:14px 16px;border-radius:12px;transition:transform .3s}
.point:hover{transform:translateY(-3px)}
.point .ico{width:34px;height:34px;flex-shrink:0;border-radius:9px;background:linear-gradient(135deg,var(--mint),var(--mint-deep));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px}
.point .t{font-size:14.5px;font-weight:700;color:var(--ink);margin-bottom:2px}
.point .d{font-size:12.5px;color:var(--ink-3)}
.about-visual{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:auto auto;gap:16px}
.about-visual img{border-radius:16px;width:100%;height:100%;object-fit:cover;box-shadow:var(--shadow-md);border:1px solid var(--line);transition:transform .4s}
.about-visual img:hover{transform:scale(1.02)}
.about-visual .span2{grid-column:span 2}

/* 数据条 */
.stats{background:linear-gradient(120deg,var(--mint-deep),var(--mint));color:#fff;padding:60px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .n{font-size:42px;font-weight:800;line-height:1.1}
.stat .n small{font-size:20px}
.stat .l{font-size:14px;opacity:.9;margin-top:8px}

/* 服务能力 */
.services{background:var(--mint-soft)}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s,border-color .3s;position:relative;overflow:hidden}
.svc-card::after{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--mint),var(--mint-deep));transform:scaleX(0);transform-origin:left;transition:transform .35s}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--mint)}
.svc-card:hover::after{transform:scaleX(1)}
.svc-ico{width:52px;height:52px;border-radius:14px;background:var(--mint-light);display:flex;align-items:center;justify-content:center;margin-bottom:18px;color:var(--mint-deep);font-size:22px;font-weight:800}
.svc-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.svc-card p{font-size:14px;color:var(--ink-3);line-height:1.8}
.svc-card .tags{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.svc-card .tags span{font-size:12px;color:var(--mint-deep);background:var(--mint-light);padding:4px 10px;border-radius:6px}

/* 一站式制作 场景 */
.scenes{background:#fff}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.scene{background:var(--mint-soft);border:1px solid var(--line);border-radius:14px;padding:20px;transition:transform .3s,box-shadow .3s;cursor:default}
.scene:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);background:#fff}
.scene h4{font-size:15.5px;font-weight:700;margin-bottom:8px;color:var(--ink);display:flex;align-items:center;gap:8px}
.scene h4::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint);flex-shrink:0}
.scene p{font-size:13px;color:var(--ink-3);line-height:1.75}

/* 行业方案 */
.solutions{background:linear-gradient(180deg,#f6fdfa,#fff)}
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sol-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:transform .3s,box-shadow .3s}
.sol-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.sol-media{height:180px;overflow:hidden;background:var(--mint-light)}
.sol-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.sol-card:hover .sol-media img{transform:scale(1.06)}
.sol-body{padding:22px}
.sol-body h3{font-size:18px;font-weight:700;margin-bottom:8px}
.sol-body p{font-size:13.5px;color:var(--ink-3);line-height:1.8}

/* 服务网络 */
.network{background:var(--ink);color:#fff;padding:88px 0;position:relative;overflow:hidden}
.network::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 400px at 80% 0%,rgba(62,201,167,.25),transparent 60%);pointer-events:none}
.network .sec-title,.network .sec-desc{color:#fff}
.network .sec-desc{color:rgba(255,255,255,.75)}
.net-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.net-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:24px;transition:transform .3s,background .3s}
.net-card:hover{transform:translateY(-4px);background:rgba(62,201,167,.14)}
.net-card h4{font-size:17px;font-weight:700;margin-bottom:10px;color:#fff}
.net-card p{font-size:13px;color:rgba(255,255,255,.7);line-height:1.8}
.net-card .city{font-size:12px;color:var(--mint);margin-top:12px;font-weight:600;letter-spacing:1px}

/* 流程步骤 */
.process{background:#fff}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative}
.step{background:var(--mint-soft);border:1px solid var(--line);border-radius:14px;padding:26px 18px;text-align:center;transition:transform .3s,box-shadow .3s;position:relative}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);background:#fff}
.step .no{width:44px;height:44px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,var(--mint),var(--mint-deep));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;box-shadow:0 6px 16px rgba(34,163,129,.3)}
.step h4{font-size:15.5px;font-weight:700;margin-bottom:8px}
.step p{font-size:12.5px;color:var(--ink-3);line-height:1.7}

/* 案例中心 */
.cases{background:var(--mint-soft)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .3s,box-shadow .3s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case-media{height:200px;overflow:hidden}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.case-card:hover .case-media img{transform:scale(1.06)}
.case-body{padding:22px}
.case-body .cat{font-size:12px;color:var(--mint-deep);font-weight:600;background:var(--mint-light);padding:3px 10px;border-radius:6px;display:inline-block;margin-bottom:10px}
.case-body h3{font-size:17px;font-weight:700;margin-bottom:8px}
.case-body p{font-size:13.5px;color:var(--ink-3);line-height:1.75}

/* 对比评测 */
.compare{background:#fff}
.compare-top{display:flex;align-items:center;justify-content:center;gap:40px;flex-wrap:wrap;margin-bottom:40px;background:linear-gradient(120deg,var(--mint-light),var(--mint-soft));border:1px solid var(--line);border-radius:var(--radius);padding:34px;max-width:720px;margin-left:auto;margin-right:auto}
.rating-score{text-align:center}
.rating-score .s{font-size:56px;font-weight:800;color:var(--mint-deep);line-height:1}
.rating-score .s small{font-size:22px;color:var(--ink-3)}
.rating-score .l{font-size:14px;color:var(--ink-3);margin-top:6px}
.rating-stars{text-align:center}
.rating-stars .stars{font-size:26px;color:#ffb400;letter-spacing:3px}
.rating-stars .l{font-size:14px;color:var(--ink-3);margin-top:6px}
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
table.compare-table{width:100%;border-collapse:collapse;min-width:760px;background:#fff}
.compare-table th,.compare-table td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
.compare-table thead th{background:var(--mint-light);color:var(--ink);font-weight:700;font-size:15px}
.compare-table thead th:nth-child(2){background:linear-gradient(135deg,var(--mint),var(--mint-deep));color:#fff}
.compare-table tbody tr:hover{background:var(--mint-soft)}
.compare-table td:first-child{font-weight:600;color:var(--ink)}
.compare-table td:nth-child(2){color:var(--mint-deep);font-weight:600}
.compare-table .yes{color:var(--mint-deep);font-weight:700}
.compare-table .no{color:#b0bfba}

/* Token 比价 */
.token{background:linear-gradient(180deg,#fff,var(--mint-soft))}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:30px}
.price-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s;position:relative}
.price-card.featured{border:2px solid var(--mint);box-shadow:var(--shadow-md);transform:scale(1.03)}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.price-card.featured:hover{transform:translateY(-6px) scale(1.03)}
.price-badge{position:absolute;top:-13px;right:24px;background:linear-gradient(135deg,var(--mint),var(--mint-deep));color:#fff;font-size:12px;font-weight:600;padding:4px 14px;border-radius:999px}
.price-card h3{font-size:19px;font-weight:700;margin-bottom:6px}
.price-card .pf{font-size:13px;color:var(--ink-3);margin-bottom:18px}
.price-card .amount{font-size:34px;font-weight:800;color:var(--mint-deep);line-height:1.1;margin-bottom:4px}
.price-card .amount small{font-size:14px;color:var(--ink-3);font-weight:500}
.price-list{margin-top:18px}
.price-list li{display:flex;gap:10px;font-size:13.5px;color:var(--ink-2);padding:6px 0}
.price-list li::before{content:"✓";color:var(--mint-deep);font-weight:800;flex-shrink:0}

/* 需求匹配 */
.match{background:var(--mint-soft)}
.match-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.match-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.match-tags span{background:#fff;border:1px solid var(--line);padding:10px 18px;border-radius:10px;font-size:14px;color:var(--ink-2);transition:all .25s;cursor:default}
.match-tags span:hover{background:var(--mint-light);border-color:var(--mint);color:var(--mint-deep);transform:translateY(-2px)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow-md)}
.form-card h3{font-size:22px;font-weight:700;margin-bottom:6px}
.form-card .fsub{font-size:13.5px;color:var(--ink-3);margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-2);margin-bottom:7px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:14.5px;font-family:inherit;color:var(--ink);background:var(--mint-soft);transition:border-color .2s,background .2s;outline:none}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--mint);background:#fff;box-shadow:0 0 0 3px rgba(62,201,167,.15)}
.form-group textarea{resize:vertical;min-height:96px}
.form-card .btn{width:100%;margin-top:6px}

/* 评论 */
.reviews{background:#fff}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{background:var(--mint-soft);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .3s,box-shadow .3s}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);background:#fff}
.review-stars{color:#ffb400;font-size:15px;letter-spacing:1px;margin-bottom:14px}
.review-text{font-size:14px;color:var(--ink-2);line-height:1.85;margin-bottom:20px}
.review-user{display:flex;align-items:center;gap:12px}
.review-avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--mint),var(--mint-deep));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex-shrink:0}
.review-user .u{font-size:14.5px;font-weight:700}
.review-user .r{font-size:12.5px;color:var(--ink-3)}

/* 帮助中心 & FAQ */
.faq{background:var(--mint-soft)}
.faq-list{max-width:860px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:box-shadow .3s,border-color .3s}
.faq-item.open{box-shadow:var(--shadow-md);border-color:var(--mint)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;cursor:pointer;font-weight:600;font-size:15.5px;color:var(--ink);user-select:none;transition:color .2s}
.faq-q:hover{color:var(--mint-deep)}
.faq-icon{width:26px;height:26px;flex-shrink:0;border-radius:50%;background:var(--mint-light);color:var(--mint-deep);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;transition:transform .3s,background .3s}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--mint);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-a p{padding-bottom:22px;font-size:14px;color:var(--ink-3);line-height:1.85}

/* AI百科 & 资讯 */
.knowledge{background:#fff}
.k-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.k-col h3{font-size:22px;font-weight:700;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.k-col h3::before{content:"";width:5px;height:22px;background:linear-gradient(180deg,var(--mint),var(--mint-deep));border-radius:3px}
.news-list li{border-bottom:1px dashed var(--line);padding:16px 0;transition:padding-left .25s}
.news-list li:hover{padding-left:8px}
.news-list a{font-size:14.5px;color:var(--ink-2);font-weight:500;display:flex;justify-content:space-between;gap:16px;align-items:center}
.news-list a:hover{color:var(--mint-deep)}
.news-list .date{font-size:12.5px;color:var(--ink-3);flex-shrink:0}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
.tag-cloud a{font-size:13.5px;color:var(--ink-2);background:var(--mint-soft);border:1px solid var(--line);padding:8px 16px;border-radius:999px;transition:all .25s}
.tag-cloud a:hover{background:var(--mint);color:#fff;border-color:var(--mint);transform:translateY(-2px)}

/* 联系我们 */
.contact{background:linear-gradient(180deg,var(--mint-soft),#fff)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch}
.contact-info{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow-sm)}
.contact-info h3{font-size:22px;font-weight:700;margin-bottom:20px}
.contact-item{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px dashed var(--line)}
.contact-item:last-child{border-bottom:none}
.contact-item .ci{width:40px;height:40px;border-radius:10px;background:var(--mint-light);color:var(--mint-deep);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-weight:700}
.contact-item .ct{font-size:12.5px;color:var(--ink-3);margin-bottom:2px}
.contact-item .cv{font-size:15px;font-weight:600;color:var(--ink);word-break:break-all}
.qr-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.qr-card img{width:200px;height:200px;object-fit:contain;border-radius:12px;border:1px solid var(--line);padding:10px;background:#fff}
.qr-card h3{font-size:19px;font-weight:700;margin-bottom:8px}
.qr-card p{font-size:13.5px;color:var(--ink-3);margin-bottom:18px}

/* 加盟代理 */
.join{background:linear-gradient(120deg,var(--mint-deep),var(--mint));color:#fff;padding:88px 0;position:relative;overflow:hidden}
.join::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 90% 10%,rgba(255,255,255,.2),transparent 60%);pointer-events:none}
.join .sec-title,.join .sec-desc{color:#fff}
.join .sec-desc{color:rgba(255,255,255,.85)}
.join-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:40px;position:relative}
.join-card{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:14px;padding:26px;transition:transform .3s,background .3s}
.join-card:hover{transform:translateY(-5px);background:rgba(255,255,255,.2)}
.join-card h4{font-size:17px;font-weight:700;margin-bottom:10px}
.join-card p{font-size:13px;color:rgba(255,255,255,.85);line-height:1.8}
.join-cta{text-align:center;position:relative}
.join-cta .btn-ghost{background:#fff;color:var(--mint-deep);border-color:#fff}
.join-cta .btn-ghost:hover{background:rgba(255,255,255,.9)}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .ai-page-logo{max-height:36px;width:auto;filter:brightness(0) invert(1)}
.footer-brand span{font-weight:800;color:#fff;font-size:17px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col p,.footer-col a{font-size:13.5px;color:rgba(255,255,255,.65);line-height:2}
.footer-col a{display:block;transition:color .2s}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom a{color:var(--mint)}

/* 浮动客服 */
.float-service{position:fixed;right:22px;bottom:90px;z-index:900;display:flex;flex-direction:column;gap:12px}
.float-btn{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--mint),var(--mint-deep));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);cursor:pointer;transition:transform .25s,box-shadow .25s;border:none;font-size:12px;font-weight:600;text-align:center;line-height:1.2;padding:0 4px}
.float-btn:hover{transform:translateY(-3px) scale(1.05);box-shadow:var(--shadow-lg)}
.float-btn svg{width:22px;height:22px}
.back-top{background:#fff;color:var(--mint-deep);border:1.5px solid var(--mint);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s,transform .25s}
.back-top.show{opacity:1;visibility:visible}
.qr-pop{position:absolute;right:64px;bottom:0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:.25s;width:180px}
.qr-pop.show{opacity:1;visibility:visible}
.qr-pop img{width:100%;border-radius:8px}
.qr-pop p{font-size:12px;color:var(--ink-3);text-align:center;margin-top:8px}

/* 滚动渐入 */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* 响应式 */
@media(max-width:1080px){
.nav-links a{padding:8px 8px;font-size:13.5px}
.hero h1{font-size:40px}
.svc-grid,.sol-grid,.case-grid,.review-grid,.price-grid{grid-template-columns:repeat(2,1fr)}
.scene-grid,.net-grid,.join-grid{grid-template-columns:repeat(2,1fr)}
.steps{grid-template-columns:repeat(3,1fr)}
.about-grid{grid-template-columns:1fr;gap:40px}
.match-grid,.contact-grid,.k-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
.nav-links{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;gap:2px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-md);transform:translateY(-120%);transition:transform .35s ease;max-height:calc(100vh - 68px);overflow-y:auto}
.nav-links.open{transform:translateY(0)}
.nav-links a{padding:13px 12px;font-size:15px;border-radius:10px}
.nav-toggle{display:flex}
.nav-cta .btn-ghost{display:none}
.hero{padding:70px 0 80px}
.hero h1{font-size:32px}
.hero-sub{font-size:16px}
.hero-kpis{grid-template-columns:repeat(2,1fr)}
.sec-title{font-size:28px}
section{padding:64px 0}
}
@media(max-width:640px){
.container{padding:0 16px}
.hero h1{font-size:27px}
.hero-kpis{grid-template-columns:repeat(2,1fr);gap:12px}
.kpi .num{font-size:23px}
.svc-grid,.sol-grid,.case-grid,.review-grid,.price-grid,.scene-grid,.net-grid,.join-grid,.steps{grid-template-columns:1fr}
.stats-grid{grid-template-columns:repeat(2,1fr);gap:30px}
.stat .n{font-size:34px}
.about-points{grid-template-columns:1fr}
.form-row{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr;gap:32px}
.compare-top{gap:20px;padding:24px}
.rating-score .s{font-size:44px}
.price-card.featured{transform:none}
.price-card.featured:hover{transform:translateY(-6px)}
.float-service{right:14px;bottom:78px}
.float-btn{width:46px;height:46px}
}