*{margin:0;padding:0;box-sizing:border-box}
:root{
--bg:#08030f;--bg2:#0f0518;--panel:#150a24;--panel2:#1b0d2e;
--pink:#ff2d9b;--purple:#a855f7;--violet:#7c3aed;--cyan:#22d3ee;
--text:#f4eefb;--muted:#b9a9d1;--line:rgba(168,85,247,.22);
--grad:linear-gradient(135deg,#ff2d9b 0%,#a855f7 55%,#7c3aed 100%);
--shadow:0 18px 50px -18px rgba(255,45,155,.45);
}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
section{position:relative;padding:84px 0}
.section-head{text-align:center;max-width:780px;margin:0 auto 52px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--pink);border:1px solid var(--line);padding:5px 16px;border-radius:99px;margin-bottom:16px;background:rgba(255,45,155,.06)}
h2.sec-title{font-size:clamp(24px,3.2vw,38px);font-weight:800;letter-spacing:.5px;line-height:1.3}
h2.sec-title span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-sub{color:var(--muted);margin-top:14px;font-size:15px}
.grid{display:grid;gap:22px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:99px;font-weight:700;font-size:15px;cursor:pointer;border:none;transition:transform .25s,box-shadow .25s,filter .25s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-3px);filter:brightness(1.1);box-shadow:0 24px 60px -16px rgba(255,45,155,.7)}
.btn-ghost{background:rgba(168,85,247,.1);color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{background:rgba(168,85,247,.22);transform:translateY(-3px)}
.btn:active{transform:scale(.97)}

/* 顶部导航 */
header.site-nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(8,3,15,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:1px}
.brand .ai-page-logo{height:36px;width:auto;max-width:150px;object-fit:contain}
.nav-links{display:flex;align-items:center;gap:0;list-style:none}
.nav-links a{display:block;padding:8px 12px;font-size:14px;color:var(--muted);border-radius:8px;transition:color .2s,background .2s}
.nav-links a:hover{color:#fff;background:rgba(168,85,247,.16)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-cta .btn{padding:9px 20px;font-size:13px}
.menu-toggle{display:none;width:42px;height:42px;border-radius:10px;background:rgba(168,85,247,.15);border:1px solid var(--line);cursor:pointer;position:relative}
.menu-toggle span{position:absolute;left:11px;right:11px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.menu-toggle span:nth-child(1){top:14px}
.menu-toggle span:nth-child(2){top:20px}
.menu-toggle span:nth-child(3){top:26px}
.menu-toggle.open span:nth-child(1){top:20px;transform:rotate(45deg)}
.menu-toggle.open span:nth-child(2){opacity:0}
.menu-toggle.open span:nth-child(3){top:20px;transform:rotate(-45deg)}

/* Hero */
.hero{padding-top:150px;padding-bottom:100px;overflow:hidden;background:radial-gradient(900px 480px at 15% -5%,rgba(255,45,155,.22),transparent 60%),radial-gradient(800px 500px at 88% 8%,rgba(124,58,237,.3),transparent 62%),var(--bg)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(168,85,247,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(168,85,247,.06) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(circle at 50% 30%,#000 20%,transparent 78%);pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(30px,4.4vw,54px);font-weight:900;line-height:1.18;letter-spacing:.5px}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--muted);font-size:16px;margin-top:22px;max-width:580px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.metric-card{background:linear-gradient(160deg,rgba(168,85,247,.16),rgba(255,45,155,.06));border:1px solid var(--line);border-radius:18px;padding:22px;position:relative;overflow:hidden;transition:transform .3s,box-shadow .3s}
.metric-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.metric-card b{display:block;font-size:30px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric-card small{color:var(--muted);font-size:13px}
.metric-card::after{content:"";position:absolute;right:-20px;top:-20px;width:70px;height:70px;border-radius:50%;background:radial-gradient(circle,rgba(255,45,155,.4),transparent 70%)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tags span{font-size:12.5px;color:#e9d8ff;background:rgba(168,85,247,.14);border:1px solid var(--line);padding:6px 14px;border-radius:99px}

/* 数据条 */
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--panel)}
.stats-bar div{padding:28px 20px;text-align:center;border-right:1px solid var(--line)}
.stats-bar div:last-child{border-right:none}
.stats-bar b{display:block;font-size:clamp(24px,3vw,34px);font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats-bar small{color:var(--muted);font-size:13px}

/* 卡片通用 */
.card{background:linear-gradient(170deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:18px;padding:26px;transition:transform .3s,box-shadow .3s,border-color .3s}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 50px -22px rgba(255,45,155,.5);border-color:rgba(255,45,155,.4)}
.card h3{font-size:18px;margin-bottom:10px;font-weight:700}
.card p{color:var(--muted);font-size:14px}
.icon-box{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:var(--grad);margin-bottom:16px;font-size:22px}
.services-grid{grid-template-columns:repeat(3,1fr)}

/* 流程 */
.steps-grid{grid-template-columns:repeat(4,1fr)}
.step{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:28px 22px;transition:transform .3s,box-shadow .3s}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.step .num{font-size:40px;font-weight:900;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.step h3{font-size:17px;margin:14px 0 8px}
.step p{color:var(--muted);font-size:13.5px}

/* 对比表 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:var(--panel)}
table.cmp{width:100%;border-collapse:collapse;min-width:720px}
table.cmp th,table.cmp td{padding:16px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
table.cmp th{background:rgba(168,85,247,.14);font-size:14px;color:#fff;font-weight:700;white-space:nowrap}
table.cmp td{color:var(--muted)}
table.cmp tr:last-child td{border-bottom:none}
table.cmp tr:hover td{background:rgba(255,45,155,.05)}
table.cmp .hl{color:var(--pink);font-weight:700}
.rate-box{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:38px;margin-bottom:40px;text-align:center}
.rate-score{font-size:clamp(40px,6vw,64px);font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.rate-stars{font-size:26px;color:#ffd24a;letter-spacing:4px}
.rate-item small{display:block;color:var(--muted);font-size:13px;margin-top:8px}
.rate-sep{width:1px;height:56px;background:var(--line)}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .3s}
.faq-item.open{border-color:rgba(255,45,155,.5)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;background:none;border:none;color:var(--text);font-size:15.5px;font-weight:600;text-align:left;cursor:pointer;font-family:inherit}
.faq-q .plus{font-size:22px;color:var(--pink);transition:transform .3s;flex-shrink:0;line-height:1}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--muted);font-size:14px}
.faq-a div{padding:0 22px 20px}

/* 评论 */
.reviews-grid{grid-template-columns:repeat(3,1fr)}
.review{background:linear-gradient(170deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:18px;padding:26px;transition:transform .3s,box-shadow .3s}
.review:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.review .stars{color:#ffd24a;font-size:15px;letter-spacing:2px;margin-bottom:12px}
.review p{color:#e8dcf7;font-size:14px;min-height:88px}
.reviewer{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;flex-shrink:0}
.reviewer b{display:block;font-size:14px}
.reviewer small{color:var(--muted);font-size:12px}

/* 案例 */
.cases-grid{grid-template-columns:repeat(3,1fr)}
.case-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .3s,box-shadow .3s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.case-card .img-wrap{aspect-ratio:16/10;overflow:hidden;background:#0b0417}
.case-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.case-card:hover .img-wrap img{transform:scale(1.06)}
.case-body{padding:20px}
.case-body h3{font-size:16.5px;margin-bottom:8px}
.case-body p{color:var(--muted);font-size:13.5px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag-row span{font-size:12px;padding:4px 11px;border-radius:99px;background:rgba(168,85,247,.16);color:#e2caff;border:1px solid var(--line)}

/* 标签云 */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:1000px;margin:0 auto}
.tag-cloud a{font-size:14px;padding:9px 20px;border-radius:99px;background:rgba(168,85,247,.1);border:1px solid var(--line);color:var(--muted);transition:.25s}
.tag-cloud a:hover{background:var(--grad);color:#fff;border-color:transparent;transform:translateY(-3px)}

/* 价格 */
.price-grid{grid-template-columns:repeat(3,1fr);align-items:stretch}
.price-card{background:linear-gradient(175deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:20px;padding:34px 28px;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s}
.price-card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.price-card.featured{border-color:rgba(255,45,155,.55);box-shadow:0 0 0 1px rgba(255,45,155,.3) inset}
.price-card .plan{font-size:14px;color:var(--pink);font-weight:700;letter-spacing:1px}
.price-card .amt{font-size:38px;font-weight:900;margin:12px 0 4px}
.price-card .amt small{font-size:14px;color:var(--muted);font-weight:500}
.price-card ul{list-style:none;margin:22px 0;display:grid;gap:11px;flex:1}
.price-card li{font-size:14px;color:var(--muted);padding-left:22px;position:relative}
.price-card li::before{content:"✦";position:absolute;left:0;color:var(--pink)}

/* 时间线 */
.timeline{position:relative;max-width:820px;margin:0 auto;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--pink),var(--violet))}
.tl-item{position:relative;margin-bottom:30px}
.tl-item::before{content:"";position:absolute;left:-32px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(255,45,155,.18)}
.tl-item h3{font-size:16.5px;margin-bottom:6px}
.tl-item p{color:var(--muted);font-size:14px}

/* 服务网络 */
.network-grid{grid-template-columns:repeat(4,1fr)}
.net-card{text-align:center;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:26px 18px;transition:transform .3s,box-shadow .3s}
.net-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.net-card .city{font-size:17px;font-weight:800;margin-bottom:6px}
.net-card p{font-size:13px;color:var(--muted)}

/* 文章 */
.articles-grid{grid-template-columns:repeat(3,1fr)}
.article-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;transition:transform .3s,box-shadow .3s}
.article-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.article-card time{font-size:12px;color:var(--pink)}
.article-card h3{font-size:16px;margin:10px 0 8px;line-height:1.5}
.article-card p{font-size:13.5px;color:var(--muted)}
.article-card a{display:inline-block;margin-top:14px;font-size:13px;color:var(--pink);font-weight:600}

/* 表单 */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start}
.contact-info{display:grid;gap:16px}
.info-item{display:flex;gap:14px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.info-item .ic{width:40px;height:40px;border-radius:11px;background:var(--grad);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:18px}
.info-item b{display:block;font-size:14.5px;margin-bottom:3px}
.info-item span{color:var(--muted);font-size:13.5px;word-break:break-all}
.qr-box{display:flex;align-items:center;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.qr-box img{width:92px;height:92px;object-fit:cover;border-radius:10px;flex-shrink:0;background:#fff}
.qr-box b{display:block;font-size:14.5px;margin-bottom:4px}
.qr-box small{color:var(--muted);font-size:13px}
form.req-form{background:linear-gradient(175deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:20px;padding:34px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;margin-bottom:8px;color:#e6d9f7;font-weight:600}
.field input,.field select,.field textarea{width:100%;background:rgba(8,3,15,.6);border:1px solid var(--line);border-radius:11px;padding:13px 15px;color:var(--text);font-size:14px;font-family:inherit;transition:border-color .25s,box-shadow .25s;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--pink);box-shadow:0 0 0 3px rgba(255,45,155,.15)}
.field textarea{resize:vertical;min-height:110px}
.field select option{background:#150a24;color:#fff}
.submit-btn{width:100%;padding:15px;font-size:16px;border-radius:12px;background:var(--grad);color:#fff;font-weight:800;border:none;cursor:pointer;transition:transform .25s,filter .25s}
.submit-btn:hover{transform:translateY(-2px);filter:brightness(1.1)}

/* 页脚 */
footer{background:linear-gradient(180deg,transparent,var(--panel));border-top:1px solid var(--line);padding:64px 0 30px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand .ai-page-logo{height:38px;width:auto;max-width:160px;object-fit:contain;margin-bottom:16px}
.footer-brand p{color:var(--muted);font-size:13.5px}
.footer-col h4{font-size:15px;margin-bottom:16px}
.footer-col ul{list-style:none;display:grid;gap:10px}
.footer-col a{color:var(--muted);font-size:13.5px;transition:color .2s}
.footer-col a:hover{color:var(--pink)}
.footer-bottom{margin-top:44px;padding-top:24px;border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:13px}

/* 浮动客服 */
.float-live{position:fixed;right:20px;bottom:90px;z-index:900;width:56px;height:56px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;box-shadow:0 12px 30px -8px rgba(255,45,155,.7);cursor:pointer;animation:floatY 3s ease-in-out infinite}
.float-live svg{width:26px;height:26px;fill:#fff}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.back-top{position:fixed;right:20px;bottom:22px;z-index:900;width:56px;height:56px;border-radius:50%;background:rgba(21,10,36,.9);border:1px solid var(--line);color:#fff;font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{transform:translateY(-4px);border-color:var(--pink)}
.kefu-pop{position:fixed;right:88px;bottom:90px;z-index:901;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px;width:230px;display:none;box-shadow:var(--shadow)}
.kefu-pop.show{display:block}
.kefu-pop img{width:100%;border-radius:10px;background:#fff}
.kefu-pop p{font-size:12.5px;color:var(--muted);text-align:center;margin-top:10px}

/* 渐入 */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media(max-width:1024px){
.hero-inner{grid-template-columns:1fr;gap:40px}
.hero-metrics{max-width:520px}
.services-grid,.cases-grid,.reviews-grid,.price-grid,.articles-grid{grid-template-columns:repeat(2,1fr)}
.steps-grid,.network-grid{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
.nav-links{position:fixed;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:rgba(12,5,22,.98);border-bottom:1px solid var(--line);padding:12px 16px;gap:2px;max-height:0;overflow:hidden;opacity:0;pointer-events:none;transition:max-height .35s ease,opacity .3s,padding .3s}
.nav-links.open{max-height:80vh;overflow-y:auto;opacity:1;pointer-events:auto}
.nav-links a{padding:12px 14px;font-size:15px}
.menu-toggle{display:block}
.nav-cta .btn-ghost{display:none}
.stats-bar{grid-template-columns:repeat(2,1fr)}
.stats-bar div:nth-child(2){border-right:none}
.stats-bar div:nth-child(1),.stats-bar div:nth-child(2){border-bottom:1px solid var(--line)}
.contact-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
section{padding:60px 0}
.hero{padding-top:120px;padding-bottom:70px}
.services-grid,.cases-grid,.reviews-grid,.price-grid,.articles-grid,.steps-grid,.network-grid{grid-template-columns:1fr}
.hero-metrics{grid-template-columns:repeat(2,1fr)}
.form-row{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.rate-box{gap:24px}
.rate-sep{display:none}
form.req-form{padding:24px 20px}
.float-live,.back-top{width:50px;height:50px}
.kefu-pop{right:80px;width:200px}
}