*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#0E1320;--ink-mid:#3C4254;--ink-soft:#6B7280;--rule:#E7E9EE;
  --paper:#F7F8FA;--white:#fff;--accent:#1677FF;--accent-light:#EAF2FF;
  --accent-dark:#0958D9;--green:#10B981;--amber:#F59E0B;
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--ink);line-height:1.65;background:var(--white);font-size:15px}
a{text-decoration:none;color:inherit}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:62px;max-width:1140px;margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:16px}
.brand .logo{width:30px;height:30px;border-radius:7px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700}
.nav-links{display:flex;gap:30px}
.nav-links a{font-size:14px;color:var(--ink-mid);transition:color .2s}
.nav-links a:hover{color:var(--accent)}
.nav-cta{background:var(--accent);color:#fff!important;padding:8px 18px;border-radius:7px;font-size:13px;font-weight:600;transition:background .2s}
.nav-cta:hover{background:var(--accent-dark)}
.hero{padding:80px 0 64px;background:linear-gradient(180deg,#F7FAFF,#fff)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--accent);background:var(--accent-light);padding:5px 12px;border-radius:20px;margin-bottom:18px}
h1{font-size:clamp(28px,4vw,42px);font-weight:700;line-height:1.25;letter-spacing:-.02em;margin-bottom:18px}
h1 span{color:var(--accent)}
.lead{color:var(--ink-mid);font-size:16px;line-height:1.8;margin-bottom:28px;max-width:480px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:32px}
.btn{display:inline-block;padding:12px 26px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:.2s;text-align:center}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(22,119,255,.25)}
.btn-primary:hover{background:var(--accent-dark)}
.btn-ghost{background:#fff;border:1.5px solid var(--rule);color:var(--ink-mid)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.hero-stats{display:flex;gap:36px}
.hero-stats .n{font-size:26px;font-weight:700;color:var(--ink)}
.hero-stats .l{font-size:12.5px;color:var(--ink-soft)}
.hero-card{background:#fff;border:1px solid var(--rule);border-radius:16px;padding:26px;box-shadow:0 8px 30px rgba(14,19,32,.06)}
.hc-row{display:flex;align-items:center;gap:13px;padding:13px 0;border-bottom:1px solid var(--rule)}
.hc-row:last-child{border-bottom:none}
.hc-ic{width:38px;height:38px;border-radius:9px;background:var(--accent-light);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.hc-t{font-weight:600;font-size:14px}
.hc-d{font-size:12px;color:var(--ink-soft)}
section{padding:72px 0}
.sec-head{text-align:center;max-width:620px;margin:0 auto 48px}
.sec-label{font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px}
h2{font-size:clamp(23px,3vw,32px);font-weight:700;letter-spacing:-.01em;margin-bottom:12px}
.sec-head p{color:var(--ink-mid);font-size:15px}
.services{background:var(--paper)}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.prod{background:#fff;border:1px solid var(--rule);border-radius:14px;overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.prod:hover{border-color:var(--accent);box-shadow:0 8px 26px rgba(22,119,255,.12);transform:translateY(-3px)}
.prod .cover{height:120px;display:flex;align-items:center;justify-content:center;font-size:40px;color:#fff}
.prod .pbody{padding:22px;display:flex;flex-direction:column;flex:1}
.prod h3{font-size:17px;font-weight:700;margin-bottom:8px}
.prod .pdesc{font-size:13px;color:var(--ink-soft);line-height:1.65;margin-bottom:16px;flex:1}
.prod .pprice{font-size:22px;font-weight:800;color:var(--ink);margin-bottom:2px}
.prod .pprice small{font-size:13px;font-weight:500;color:var(--ink-soft)}
.prod .pcycle{font-size:12px;color:var(--ink-soft);margin-bottom:16px}
.prod .pbtns{display:flex;gap:8px}
.prod .pbtns .btn{flex:1;padding:9px;font-size:13px}
.process{background:var(--white)}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.step{text-align:center}
.step .num{width:46px;height:46px;border-radius:50%;background:#fff;border:2px solid var(--accent);color:var(--accent);font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:16px}
.step h4{font-size:14.5px;font-weight:700;margin-bottom:6px}
.step p{font-size:12.5px;color:var(--ink-soft);line-height:1.6}
.faq{background:var(--paper)}
.faq-list{max-width:760px;margin:0 auto}
.qa{background:#fff;border:1px solid var(--rule);border-radius:12px;margin-bottom:12px;overflow:hidden}
.qa summary{padding:18px 22px;font-weight:600;font-size:15px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:'+';font-size:22px;color:var(--accent);font-weight:400}
.qa[open] summary::after{content:'\2212'}
.qa .a{padding:0 22px 18px;color:var(--ink-mid);font-size:14px;line-height:1.75}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:start}
.contact-info .item{display:flex;gap:14px;padding:16px 18px;background:var(--paper);border:1px solid var(--rule);border-radius:11px;margin-bottom:14px}
.contact-info .ic{font-size:20px}
.contact-info .lbl{font-size:11.5px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.04em;margin-bottom:2px}
.contact-info .val{font-size:14.5px;font-weight:600}
.form{background:#fff;border:1px solid var(--rule);border-radius:16px;padding:30px;box-shadow:0 8px 30px rgba(14,19,32,.05)}
.form h3{font-size:19px;font-weight:700;margin-bottom:6px}
.form .sub{font-size:13px;color:var(--ink-soft);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border:1.5px solid var(--rule);border-radius:8px;font-size:14px;font-family:inherit;transition:border-color .2s;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.field textarea{resize:vertical;min-height:90px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .btn-primary{width:100%;font-size:15px;padding:13px}
.form-note{font-size:12px;color:var(--ink-soft);text-align:center;margin-top:12px}
#msg{display:none;padding:13px;border-radius:8px;font-size:14px;margin-top:14px;text-align:center}
#msg.ok{display:block;background:#ECFDF5;color:#047857;border:1px solid #A7F3D0}
footer{background:var(--ink);color:#fff;padding:48px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:32px}
.foot-brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;margin-bottom:12px}
.foot-brand .logo{width:30px;height:30px;border-radius:7px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:15px}
footer p{font-size:13px;color:#9AA3B2;line-height:1.8;max-width:300px}
.foot-col h5{font-size:13px;font-weight:700;margin-bottom:14px;color:#fff}
.foot-col a,.foot-col div{display:block;font-size:13px;color:#9AA3B2;margin-bottom:9px;transition:color .2s}
.foot-col a:hover{color:#fff}
.foot-bottom{border-top:1px solid #1E2533;padding-top:22px;text-align:center;font-size:12.5px;color:#6B7280}
/* detail page */
.crumb{padding:20px 0;font-size:13px;color:var(--ink-soft)}
.crumb a:hover{color:var(--accent)}
.detail-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:start;padding-bottom:40px}
.detail-main h1{font-size:28px;margin-bottom:14px}
.detail-cover{height:200px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:64px;color:#fff;margin-bottom:24px}
.detail-main h3{font-size:18px;font-weight:700;margin:28px 0 12px}
.detail-main p{color:var(--ink-mid);font-size:14.5px;line-height:1.8;margin-bottom:12px}
.detail-main ul{margin:0 0 12px 0;padding-left:0;list-style:none}
.detail-main ul li{font-size:14px;color:var(--ink-mid);padding:7px 0 7px 26px;position:relative;border-bottom:1px solid var(--paper)}
.detail-main ul li::before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:700}
.buy-card{position:sticky;top:84px;background:#fff;border:1px solid var(--rule);border-radius:16px;padding:26px;box-shadow:0 8px 30px rgba(14,19,32,.06)}
.buy-card .bp{font-size:30px;font-weight:800;margin-bottom:4px}
.buy-card .bp small{font-size:14px;font-weight:500;color:var(--ink-soft)}
.buy-card .bc{font-size:13px;color:var(--ink-soft);margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--rule)}
.buy-card .brow{display:flex;justify-content:space-between;font-size:13.5px;padding:8px 0;color:var(--ink-mid)}
.buy-card .brow b{color:var(--ink)}
.buy-card .btn{width:100%;margin-top:18px}
.buy-card .bnote{font-size:12px;color:var(--ink-soft);text-align:center;margin-top:12px;line-height:1.6}
@media(max-width:860px){
  .nav-links{display:none}
  .hero-grid,.contact-grid,.detail-grid{grid-template-columns:1fr;gap:36px}
  .prod-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr;gap:24px}
  .row2,.foot-grid{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .buy-card{position:static}
}

/* === Mockup covers === */
.prod .cover{height:auto;padding:0;background:none!important;overflow:hidden}
.prod .cover img,.prod .cover svg{display:block;width:100%;height:auto}
.detail-cover{height:auto;padding:0;overflow:hidden}
.detail-cover img,.detail-cover svg{display:block;width:100%;height:auto;border-radius:14px}

/* === Trust bar === */
.trustbar{background:#fff;border-bottom:1px solid var(--rule);padding:26px 0}
.trustbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.trustbar .ti{display:flex;align-items:center;gap:11px}
.trustbar .ti .ic{width:38px;height:38px;border-radius:9px;background:var(--accent-light);display:flex;align-items:center;justify-content:center;font-size:18px}
.trustbar .ti .tt{font-size:14px;font-weight:700}
.trustbar .ti .td{font-size:12px;color:var(--ink-soft)}

/* === Testimonials === */
.testi{background:#fff}
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tcard{border:1px solid var(--rule);border-radius:14px;padding:26px;background:var(--paper);position:relative}
.tcard .stars{color:#F59E0B;font-size:14px;letter-spacing:2px;margin-bottom:12px}
.tcard .quote{font-size:14px;color:var(--ink-mid);line-height:1.75;margin-bottom:18px}
.tcard .who{display:flex;align-items:center;gap:11px}
.tcard .ava{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:15px}
.tcard .wn{font-size:13.5px;font-weight:700}
.tcard .wr{font-size:12px;color:var(--ink-soft)}

/* === Tech / partner wall === */
.tech{background:var(--paper)}
.tech-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.tchip{background:#fff;border:1px solid var(--rule);border-radius:11px;padding:18px 10px;text-align:center;transition:.2s}
.tchip:hover{border-color:var(--accent);transform:translateY(-2px)}
.tchip .ti2{font-size:22px;margin-bottom:7px}
.tchip .tn{font-size:12px;font-weight:600;color:var(--ink-mid)}
@media(max-width:860px){
  .testi-grid{grid-template-columns:1fr}
  .tech-grid{grid-template-columns:repeat(3,1fr)}
  .trustbar .wrap{justify-content:flex-start}
}

/* WeChat QR */
.qr-card{background:var(--paper);border:1px solid var(--rule);border-radius:11px;padding:18px;text-align:center;margin-top:14px}
.qr-card img{width:140px;height:140px;border-radius:8px;background:#fff;padding:6px;border:1px solid var(--rule)}
.qr-card .qt{font-size:13px;font-weight:600;margin-top:10px}
.qr-card .qd{font-size:12px;color:var(--ink-soft);margin-top:3px}