:root{
  --blue:#0b5cff; --blue-dark:#0846c8; --ink:#1a2233; --ink-2:#4a5568;
  --bg:#ffffff; --bg-soft:#f4f7fd; --line:#e3e9f5; --card:#ffffff;
  --shadow:0 10px 30px rgba(11,92,255,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
.container{width:min(1140px,92%);margin:0 auto}
section{padding:72px 0}
h2.sec-title{font-size:clamp(24px,3.5vw,34px);text-align:center;margin-bottom:8px}
p.sec-sub{text-align:center;color:var(--ink-2);max-width:640px;margin:0 auto 44px}

/* Header */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px}
.logo img{height:36px;width:auto}
.nav-links{display:flex;gap:28px;font-size:15px}
.nav-links a{color:var(--ink-2)}
.nav-links a:hover{color:var(--blue)}
.btn{display:inline-block;background:var(--blue);color:#fff;padding:10px 22px;border-radius:8px;font-weight:600;font-size:15px;transition:.2s;border:none;cursor:pointer}
.btn:hover{background:var(--blue-dark)}
.btn.ghost{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}
.btn.ghost:hover{background:var(--blue);color:#fff}
.menu-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--ink)}

/* Hero */
.hero{background:linear-gradient(160deg,#f0f5ff 0%,#ffffff 60%);padding:88px 0 72px}
.badge{display:inline-flex;align-items:center;gap:8px;background:#e8f0ff;color:var(--blue);font-weight:600;font-size:14px;padding:7px 16px;border-radius:999px;margin-bottom:20px;border:1px solid #cddcff}
.badge::before{content:"★";font-size:13px}

/* 授权证书 */
.cert-wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:44px;align-items:center}
.cert-img{border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);background:#fff}
.cert-info h2{font-size:clamp(22px,3vw,30px);margin-bottom:14px}
.cert-info p{color:var(--ink-2)}
.cert-meta{margin-top:20px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.cert-meta div{display:flex;padding:12px 18px;font-size:14.5px}
.cert-meta div+div{border-top:1px solid var(--line)}
.cert-meta b{width:96px;flex-shrink:0;color:var(--ink-2);font-weight:500}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(30px,4.6vw,46px);line-height:1.25;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero p.lead{color:var(--ink-2);font-size:17px;margin-bottom:30px;max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{border-radius:18px;background:linear-gradient(135deg,var(--blue),#35a0ff);box-shadow:var(--shadow);padding:34px;color:#fff}
.hero-visual .mock{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);border-radius:12px;padding:20px;backdrop-filter:blur(4px)}
.mock-row{display:flex;gap:10px;margin-bottom:12px}
.mock-tile{flex:1;aspect-ratio:16/10;border-radius:8px;background:rgba(255,255,255,.25);display:grid;place-items:center;font-size:12px}
.mock-bar{margin-top:6px;display:flex;justify-content:center;gap:12px}
.mock-dot{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.3);display:grid;place-items:center;font-size:16px}
.stats{display:flex;gap:36px;margin-top:40px;flex-wrap:wrap}
.stats .num{font-size:26px;font-weight:700;color:var(--blue)}
.stats .lbl{font-size:13px;color:var(--ink-2)}

/* Products */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:30px 26px;box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-4px)}
.card .icon{width:48px;height:48px;border-radius:12px;background:#e8f0ff;display:grid;place-items:center;font-size:22px;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--ink-2);font-size:14.5px}
.card ul{margin:12px 0 0 18px;color:var(--ink-2);font-size:14px}

/* Solutions band */
.band{background:var(--bg-soft)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split h2{font-size:clamp(22px,3vw,30px);margin-bottom:14px}
.split p{color:var(--ink-2)}
.check-list{list-style:none;margin-top:18px}
.check-list li{padding:8px 0 8px 30px;position:relative;font-size:15px}
.check-list li::before{content:"✓";position:absolute;left:0;color:var(--blue);font-weight:700}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px}
.flow .step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 12px;text-align:center;font-size:14px}
.flow .step b{display:block;color:var(--blue);font-size:20px;margin-bottom:4px}

/* About / Why us */
.why .cards .card{border-top:3px solid var(--blue)}

/* Contact */
.contact{background:linear-gradient(135deg,var(--blue),#0846c8);color:#fff}
.contact h2{color:#fff}
.contact .sec-sub{color:rgba(255,255,255,.85)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.contact-info div{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.25);font-size:15.5px}
.contact-info b{display:inline-block;width:88px;opacity:.8;font-weight:500}
.form{background:#fff;border-radius:14px;padding:28px;color:var(--ink)}
.form label{display:block;font-size:13.5px;color:var(--ink-2);margin:12px 0 4px}
.form input,.form textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:14.5px;font-family:inherit}
.form input:focus,.form textarea:focus{outline:2px solid var(--blue);border-color:transparent}
.form .btn{width:100%;margin-top:18px;padding:12px}
.form .tip{font-size:12.5px;color:var(--ink-2);margin-top:10px;text-align:center}

footer{padding:30px 0;background:#101a30;color:#9aa7c4;font-size:13.5px;text-align:center}
footer .foot-note{margin-top:6px;font-size:12px;color:#5f6c8c}

@media (max-width:860px){
  .hero-grid,.split,.contact-grid,.cert-wrap{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 5%;gap:14px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
  .flow{grid-template-columns:repeat(2,1fr)}
  section{padding:56px 0}
}


/* ===== 子页补充样式 ===== */
.page-hero{background:linear-gradient(160deg,#f0f5ff 0%,#ffffff 60%);padding:64px 0 48px}
.page-hero h1{font-size:clamp(26px,4vw,38px);line-height:1.3;margin-bottom:14px}
.page-hero p{color:var(--ink-2);font-size:16.5px;max-width:760px}
.breadcrumb{font-size:13.5px;color:var(--ink-2);margin-bottom:18px}
.breadcrumb a{color:var(--blue)}
.breadcrumb span{margin:0 6px;opacity:.6}
.prose{max-width:820px}
.prose h2{font-size:clamp(21px,3vw,28px);margin:36px 0 14px;padding-left:12px;border-left:4px solid var(--blue)}
.prose h3{font-size:18px;margin:24px 0 8px}
.prose p,.prose li{color:var(--ink-2);font-size:15.5px}
.prose ul{margin:10px 0 16px 22px}
.sub-nav{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 0}
.sub-nav a{padding:8px 16px;border-radius:999px;border:1.5px solid #dbe4f8;background:#fff;
  color:var(--blue);font-size:14px;font-weight:600}
.sub-nav a:hover{border-color:var(--blue);background:#f4f8ff}
.sub-nav a.cur{background:var(--blue);color:#fff;border-color:var(--blue)}
.cta-band{background:linear-gradient(135deg,var(--blue),#0846c8);color:#fff;border-radius:16px;
  padding:38px 34px;margin:44px 0;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(21px,3vw,27px);margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.88);margin-bottom:22px}
.cta-band .btn{background:#fff;color:var(--blue)}
.cta-band .btn:hover{background:#eef4ff}