:root{
  --bg:#f4f5f7;--bg2:#eceef1;--bg3:#fafbfc;
  --accent:#0a8ab0;--accent2:#0e7490;--accent3:#ff7a00;
  --text:#1f2329;--text2:#5c6470;--border:#e1e4e9;
  --card:#ffffff;--card-hover:#f5f7f9;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:#333;border-radius:3px}

/* Nav */
.nav{position:fixed;top:0;width:100%;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:background .3s}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;letter-spacing:2px;color:var(--text);white-space:nowrap;text-decoration:none}
.logo img{height:40px;width:auto;display:block}
.logo span{color:var(--text);letter-spacing:2px}
.nav-menu{display:flex;gap:26px;align-items:center}
.nav-menu a{font-size:14px;color:var(--text2);transition:color .2s;white-space:nowrap;padding:6px 0}
.nav-menu a:hover,.nav-menu a.active{color:var(--accent)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--text);transition:.3s;border-radius:1px}
.nav-menu .taobao-link,.footer-col .taobao-link{display:inline-flex;align-items:center;gap:6px;background:var(--accent3);color:#fff;padding:8px 18px;border-radius:20px;font-size:13px;font-weight:600;line-height:1.2;white-space:nowrap;transition:opacity .2s;vertical-align:middle}
.taobao-link:hover,.nav-menu .taobao-link:hover,.footer-col .taobao-link:hover{opacity:.9}

/* Hero (homepage) */
.hero{min-height:92vh;display:flex;align-items:center;justify-content:center;text-align:center;position:relative;overflow:hidden;padding:120px 24px 80px}
.hero::before{content:'';position:absolute;top:-20%;left:50%;transform:translateX(-50%);width:900px;height:900px;background:radial-gradient(circle,rgba(0,212,255,.08) 0%,transparent 60%);pointer-events:none}
.hero::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:1px;background:linear-gradient(90deg,transparent,var(--border),transparent)}
.hero-content{max-width:860px;position:relative;z-index:1}
.hero h1{font-size:48px;font-weight:700;letter-spacing:2px;margin-bottom:18px;line-height:1.25}
.hero h1 span{color:var(--accent)}
.hero-slogan{font-size:17px;color:var(--text);margin-bottom:10px;font-weight:600;line-height:1.7}
.hero-sub{font-size:16px;color:var(--text2);margin-bottom:26px;line-height:1.8}
.hero-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:24px 0}
.hero-tags .tag{padding:6px 16px;border:1px solid rgba(0,212,255,.35);border-radius:20px;font-size:13px;color:var(--accent);background:rgba(0,212,255,.05)}
.hero-cta{display:inline-flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 32px;border-radius:6px;font-size:15px;transition:all .25s;cursor:pointer;font-weight:600}
.btn-primary{background:var(--accent);color:#fff;border:none}
.btn-primary:hover{background:#33ddff;box-shadow:0 0 28px rgba(0,212,255,.35)}
.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.scroll-hint{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);font-size:13px;color:var(--text2);animation:bounce 2s infinite}
@keyframes bounce{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* Trust */
.trust{padding:28px 24px;border-bottom:1px solid var(--border);background:var(--bg2)}
.trust-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:center;flex-wrap:wrap;gap:28px 56px}
.trust-item{display:flex;align-items:center;gap:10px;color:var(--text2);font-size:14px}
.trust-item strong{color:var(--text);font-size:18px;font-weight:700}

/* Sub-page header (clears fixed nav) */
.page-hero{padding:120px 24px 56px;text-align:center;background:var(--bg2);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:36px;font-weight:700;letter-spacing:1.5px;margin-bottom:14px;color:var(--text)}
.page-hero p{font-size:16px;color:var(--text2);max-width:680px;margin:0 auto;line-height:1.8}

/* Breadcrumb */
.breadcrumb{max-width:1200px;margin:0 auto;padding:18px 24px 0;font-size:13px;color:var(--text2)}
.breadcrumb a{color:var(--text2)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{margin:0 8px;color:#555}

/* Section */
.section{max-width:1200px;margin:0 auto;padding:80px 24px}
.section-title{text-align:center;margin-bottom:56px}
.section-title h2{font-size:34px;font-weight:700;letter-spacing:1.5px;margin-bottom:14px}
.section-title .line{width:48px;height:3px;background:var(--accent);margin:0 auto 16px;border-radius:2px}
.section-title p{font-size:15px;color:var(--text2);max-width:680px;margin:0 auto}

/* Products */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.prod-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:28px;transition:all .25s;position:relative;scroll-margin-top:90px}
.prod-card:hover{background:var(--card-hover);border-color:var(--accent);transform:translateY(-4px)}
.prod-card .ic{display:none}
.prod-card h3{font-size:18px;margin-bottom:10px;color:var(--text)}
.prod-card .desc{font-size:14px;color:var(--text2);margin-bottom:14px;line-height:1.7}
.prod-card .spec{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.prod-card .spec span{font-size:12px;padding:4px 10px;background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.2);border-radius:4px;color:var(--accent)}
.prod-card .link{font-size:13px;color:var(--accent);font-weight:600}
.prod-card .pc-img{display:block;margin:0 0 18px}
.pc-img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:contain;border-radius:8px;background:#000;margin:0 0 18px}
.pc-portrait{aspect-ratio:4/3;object-fit:contain;background:#000}

/* Gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.gallery-card{background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:all .25s}
.gallery-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.gallery-img{width:100%;aspect-ratio:4/3;object-fit:cover;background:var(--bg2)}
.gallery-body{padding:18px}
.gallery-body h3{font-size:16px;margin-bottom:6px;color:var(--text)}
.gallery-body p{font-size:13px;color:var(--text2)}

/* App cases */
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
.case-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:28px;transition:all .25s}
.case-card:hover{border-color:var(--accent)}
.case-card h3{font-size:19px;color:var(--text);margin-bottom:10px}
.case-card p{font-size:14px;color:var(--text2);line-height:1.8}
.case-card .tag{display:inline-block;margin-top:12px;font-size:12px;color:var(--accent);border:1px solid rgba(0,212,255,.25);border-radius:14px;padding:3px 12px}
.case-img{display:block;width:100%;aspect-ratio:4/3;object-fit:contain;background:#000;border-radius:8px;margin:0 0 16px}
.testi{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;margin-top:32px}
.testi-card{background:var(--bg2);border-left:3px solid var(--accent);border-radius:0 10px 10px 0;padding:22px 24px}
.testi-card blockquote{font-size:15px;color:var(--text);line-height:1.8;margin-bottom:10px}
.testi-card cite{font-size:13px;color:var(--text2);font-style:normal}

/* Capability */
.cap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:24px}
.cap-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:30px;transition:all .25s}
.cap-card:hover{border-color:var(--accent)}
.cap-card .cap-no{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border-radius:50%;background:rgba(0,212,255,.1);color:var(--accent);font-weight:700;margin-bottom:16px}
.cap-card h3{font-size:19px;color:var(--text);margin-bottom:12px}
.cap-card p{font-size:14px;color:var(--text2);line-height:1.9}

/* Advantages */
.adv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;text-align:center}
.adv-item{padding:32px 20px;background:var(--card);border:1px solid var(--border);border-radius:12px;transition:all .25s}
.adv-item:hover{border-color:var(--accent)}
.adv-item .num{font-size:42px;font-weight:700;color:var(--accent);opacity:.25;margin-bottom:8px;line-height:1}
.adv-item h4{font-size:17px;margin-bottom:10px;color:var(--text)}
.adv-item p{font-size:14px;color:var(--text2);line-height:1.7}

/* About */
.about-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:start;max-width:860px;margin:0 auto}
.about-text h3{font-size:22px;margin-bottom:16px;color:var(--text)}
.about-text p{font-size:15px;color:var(--text2);margin-bottom:16px;line-height:1.9}
.about-text .vision{background:linear-gradient(135deg,rgba(0,212,255,.06),transparent);border:1px solid var(--border);border-radius:10px;padding:18px 20px;font-size:15px;color:var(--text);font-weight:600}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;text-align:center}
.contact-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:28px;transition:all .25s}
.contact-card:hover{border-color:var(--accent)}
.contact-card .ic{font-size:30px;margin-bottom:12px}
.contact-card h4{font-size:16px;color:var(--text);margin-bottom:8px}
.contact-card p{font-size:15px;color:var(--accent);font-weight:600;word-break:break-all}
.contact-card a{font-size:15px;color:var(--accent);font-weight:600}
.contact-card .qr{width:185px;height:183px;margin:8px auto 0;border-radius:8px;background:var(--bg2);object-fit:contain}
.contact-cta{text-align:center;margin-top:40px}
.taobao-btn{background:var(--accent3);color:#fff;border:none;padding:14px 34px;font-size:16px}
.taobao-btn:hover{background:#ff8c1a}

/* CTA */
.cta{text-align:center;padding:80px 24px;background:linear-gradient(180deg,var(--bg) 0%,var(--bg3) 100%);border-top:1px solid var(--border)}
.cta h2{font-size:30px;margin-bottom:16px;color:var(--text)}
.cta p{font-size:16px;color:var(--text2);margin-bottom:32px;max-width:560px;margin-left:auto;margin-right:auto}

/* Footer */
.footer{border-top:1px solid var(--border);padding:48px 24px 0;background:var(--bg2)}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:32px;text-align:left}
.footer-col h5{font-size:14px;color:var(--text);margin-bottom:14px;font-weight:700}
.footer-col a,.footer-col p{display:block;font-size:13px;color:var(--text2);margin-bottom:8px;transition:color .2s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{max-width:1200px;margin:36px auto 0;padding:24px;border-top:1px solid var(--border);font-size:12px;color:#666;text-align:center;line-height:1.8}
.footer-bottom a{color:#888}

@media(max-width:900px){.about-grid{grid-template-columns:1fr}.prod-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){
  .hero h1{font-size:30px;letter-spacing:1px}
  .page-hero h1{font-size:26px}
  .nav-menu{display:none;position:absolute;top:64px;left:0;width:100%;background:var(--bg2);flex-direction:column;padding:16px;gap:12px;border-bottom:1px solid var(--border);align-items:flex-start}
  .nav-menu.show{display:flex}
  .nav-menu .taobao-link{margin-top:6px}
  .prod-grid{grid-template-columns:1fr}
  .nav-toggle{display:flex}
  .section{padding:56px 16px}
  .section-title h2{font-size:26px}
  .trust-inner{gap:20px 32px}
  .hero-cta,.contact-cta{flex-direction:column;align-items:stretch}
  .btn{width:100%;justify-content:center}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.scroll-hint{animation:none}}

/* Product detail page */
.prod-detail{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;max-width:1200px;margin:0 auto}
.prod-media{position:sticky;top:90px}
.prod-media img{width:100%;aspect-ratio:4/3;object-fit:contain;border-radius:12px;border:1px solid var(--border);background:var(--bg2)}
.prod-info h2{font-size:26px;color:var(--text);margin-bottom:14px;letter-spacing:1px}
.prod-info .lead{font-size:15px;color:var(--text2);line-height:1.95;margin-bottom:22px}
.prod-info .chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.prod-info .chips span{font-size:12px;padding:5px 12px;background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.2);border-radius:4px;color:var(--accent)}
.spec-table{width:100%;border-collapse:collapse;margin:6px 0 6px;font-size:14px}
.spec-table th,.spec-table td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border)}
.spec-table th{color:var(--text2);font-weight:600;width:150px;background:var(--bg2);border-radius:6px 0 0 6px}
.spec-table td{color:var(--text)}
.app-list{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:10px 0 0}
.app-list li{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:14px 16px;font-size:14px;color:var(--text);line-height:1.6}
.app-list li::before{content:'▹';color:var(--accent);margin-right:8px}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin-top:24px}
.related a{display:block;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px 18px;transition:all .25s;font-size:14px;color:var(--text);font-weight:600;line-height:1.5}
.related a:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-3px)}
.related .rel-sub{display:block;font-size:12px;color:var(--text2);font-weight:400;margin-top:4px}
@media(max-width:768px){.prod-detail{grid-template-columns:1fr;gap:24px}.prod-media{position:static}}