*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#1e293b;line-height:1.7;background:#f8fafc}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
section{padding:70px 0}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:30px;color:#0f172a;margin-bottom:10px}
.sec-head p{color:#64748b;font-size:15px}
.sec-head .bar{width:56px;height:4px;background:linear-gradient(90deg,#6d28d9,#2563eb);margin:12px auto 0;border-radius:2px}
.btn{display:inline-block;padding:13px 32px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;border:none;transition:.25s}
.btn-primary{background:linear-gradient(135deg,#7c3aed,#2563eb);color:#fff;box-shadow:0 6px 18px rgba(79,70,229,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(79,70,229,.45)}
.btn-outline{background:#fff;color:#2563eb;border:1.5px solid #2563eb}
.btn-outline:hover{background:#eff6ff}
/* nav */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 12px rgba(15,23,42,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.nav-links{display:flex;gap:0;list-style:none}
.nav-links a{display:block;padding:10px 13px;font-size:14px;color:#334155;border-radius:6px;transition:.2s}
.nav-links a:hover{color:#2563eb;background:#eff6ff}
.menu-btn{display:none;font-size:26px;background:none;border:none;color:#1e293b;cursor:pointer}
/* hero */
.hero{background:linear-gradient(135deg,#1e1b4b 0%,#312e81 40%,#1d4ed8 100%);color:#fff;padding:90px 0 80px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(139,92,246,.35),transparent 70%);top:-120px;right:-80px}
.hero::after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(56,189,248,.28),transparent 70%);bottom:-100px;left:-60px}
.hero .container{position:relative;z-index:2}
.hero h1{font-size:40px;line-height:1.35;margin-bottom:18px}
.hero h1 span{background:linear-gradient(90deg,#a78bfa,#38bdf8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:17px;color:#c7d2fe;max-width:720px;margin-bottom:30px}
.hero .btns{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:44px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:22px;text-align:center;backdrop-filter:blur(4px)}
.stat b{font-size:30px;display:block;background:linear-gradient(90deg,#c4b5fd,#7dd3fc);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13px;color:#cbd5e1}
/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:#fff;border-radius:14px;padding:26px;box-shadow:0 4px 16px rgba(15,23,42,.06);transition:.3s;border:1px solid #eef2f7}
.card:hover{transform:translateY(-5px);box-shadow:0 14px 30px rgba(37,99,235,.13)}
.card .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#ede9fe,#dbeafe);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:14px}
.card h3{font-size:17px;margin-bottom:8px;color:#0f172a}
.card p{font-size:14px;color:#64748b}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.tag{background:#fff;border:1px solid #e2e8f0;padding:7px 16px;border-radius:20px;font-size:13px;color:#475569;transition:.2s}
.tag:hover{background:#2563eb;color:#fff;border-color:#2563eb}
/* steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:s}
.step{text-align:center;background:#fff;border-radius:14px;padding:28px 14px;border:1px solid #eef2f7;transition:.3s}
.step:hover{transform:translateY(-4px);box-shadow:0 12px 26px rgba(37,99,235,.12)}
.step::before{counter-increment:s;content:"0" counter(s);display:inline-block;width:44px;height:44px;line-height:44px;border-radius:50%;background:linear-gradient(135deg,#7c3aed,#2563eb);color:#fff;font-weight:700;margin-bottom:12px}
.step h3{font-size:15px;margin-bottom:6px}
.step p{font-size:13px;color:#64748b}
/* table */
.table-wrap{overflow-x:auto;background:#fff;border-radius:14px;box-shadow:0 4px 16px rgba(15,23,42,.06)}
table{width:100%;border-collapse:collapse;min-width:640px}
th,td{padding:14px 18px;text-align:left;font-size:14px;border-bottom:1px solid #eef2f7}
th{background:#f1f5f9;color:#0f172a;font-weight:600}
tr:hover td{background:#f8faff}
.stars{color:#f59e0b;letter-spacing:2px}
.score-badge{display:inline-block;background:linear-gradient(135deg,#f59e0b,#ef4444);color:#fff;border-radius:8px;padding:4px 12px;font-weight:700}
/* faq */
.faq-item{background:#fff;border-radius:12px;margin-bottom:12px;border:1px solid #eef2f7;overflow:hidden}
.faq-q{width:100%;text-align:left;padding:17px 22px;font-size:15px;font-weight:600;color:#1e293b;background:none;border:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:"+";font-size:20px;color:#2563eb;transition:.3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 22px}
.faq-item.open .faq-a{max-height:200px;padding-bottom:16px}
.faq-a p{font-size:14px;color:#64748b}
/* reviews */
.review .head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#7c3aed,#2563eb);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review .role{font-size:12px;color:#94a3b8}
.review p{font-size:14px;color:#475569}
.review .stars{font-size:14px}
/* timeline */
.timeline{position:relative;max-width:720px;margin:0 auto;padding-left:28px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(#7c3aed,#2563eb)}
.tl-item{position:relative;margin-bottom:26px}
.tl-item::before{content:"";position:absolute;left:-26px;top:6px;width:12px;height:12px;border-radius:50%;background:#2563eb;border:3px solid #ede9fe}
.tl-item h3{font-size:16px}
.tl-item p{font-size:14px;color:#64748b}
/* case images */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-grid figure{border-radius:14px;overflow:hidden;box-shadow:0 6px 20px rgba(15,23,42,.1);transition:.3s;background:#fff}
.case-grid figure:hover{transform:translateY(-5px)}
.case-grid figcaption{padding:12px 16px;font-size:14px;color:#475569;font-weight:600}
/* form */
.form-sec{background:linear-gradient(135deg,#eef2ff,#eff6ff)}
.form-card{max-width:720px;margin:0 auto;background:#fff;border-radius:16px;padding:34px;box-shadow:0 10px 30px rgba(37,99,235,.1)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.form-card label{font-size:14px;font-weight:600;color:#334155;display:block;margin-bottom:6px}
.form-card input,.form-card select,.form-card textarea{width:100%;padding:12px 14px;border:1px solid #d7dee8;border-radius:8px;font-size:14px;font-family:inherit;transition:.2s}
.form-card input:focus,.form-card select:focus,.form-card textarea:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.form-card textarea{resize:vertical;min-height:110px}
/* footer */
footer{background:#0f172a;color:#94a3b8;padding:56px 0 0;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
footer h4{color:#fff;font-size:16px;margin-bottom:14px}
footer a:hover{color:#fff}
footer ul{list-style:none}
footer li{margin-bottom:8px}
.copyright{border-top:1px solid #1e293b;padding:18px 0;text-align:center;font-size:13px;color:#64748b}
/* float */
.float-bar{position:fixed;right:18px;bottom:90px;z-index:99;display:flex;flex-direction:column;gap:10px}
.float-bar a,.float-bar button{width:52px;height:52px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:22px;color:#fff;box-shadow:0 6px 16px rgba(15,23,42,.2);transition:.25s}
.float-bar a:hover,.float-bar button:hover{transform:translateY(-3px)}
.f-kefu{background:linear-gradient(135deg,#10b981,#059669)}
.f-top{background:linear-gradient(135deg,#6d28d9,#2563eb)}
.qr-pop{position:fixed;right:84px;bottom:90px;z-index:99;background:#fff;border-radius:12px;padding:12px;box-shadow:0 10px 30px rgba(15,23,42,.2);display:none;text-align:center;font-size:12px;color:#475569}
.qr-pop.show{display:block}
.qr-pop img{width:150px;border-radius:8px}
/* price */
.price-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{background:#fff;border-radius:14px;padding:26px;text-align:center;border:1px solid #eef2f7;transition:.3s}
.price-card:hover{transform:translateY(-5px);box-shadow:0 14px 30px rgba(37,99,235,.13)}
.price-card.hot{border:2px solid #2563eb;position:relative}
.price-card.hot::before{content:"推荐";position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:#2563eb;color:#fff;font-size:12px;padding:3px 14px;border-radius:12px}
.price-card .p{font-size:32px;color:#2563eb;font-weight:800;margin:10px 0}
.price-card ul{list-style:none;font-size:13px;color:#64748b;margin:14px 0 20px;text-align:left}
.price-card li::before{content:"✓ ";color:#10b981;font-weight:700}
/* articles */
.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article-item{background:#fff;border-radius:12px;padding:20px;border:1px solid #eef2f7;transition:.3s}
.article-item:hover{transform:translateY(-4px);box-shadow:0 12px 26px rgba(37,99,235,.1)}
.article-item h3{font-size:15px;margin-bottom:8px;color:#0f172a}
.article-item p{font-size:13px;color:#64748b}
/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}
@media(max-width:960px){
.nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;box-shadow:0 10px 20px rgba(15,23,42,.1);padding:10px 0}
.nav-links.open{display:flex}
.menu-btn{display:block}
.stats{grid-template-columns:repeat(2,1fr)}
.grid-3,.grid-4,.case-grid,.article-list,.price-cards{grid-template-columns:repeat(2,1fr)}
.steps{grid-template-columns:repeat(2,1fr)}
.foot-grid{grid-template-columns:1fr 1fr}
.hero h1{font-size:30px}
}
@media(max-width:600px){
.grid-3,.grid-4,.case-grid,.article-list,.price-cards,.steps,.form-grid,.foot-grid{grid-template-columns:1fr}
section{padding:50px 0}
.hero h1{font-size:25px}
.sec-head h2{font-size:24px}
}