/* ===== 设计变量（浅色主题） ===== */
:root{
  --bg:#f6f8fc;
  --bg-2:#ffffff;
  --surface:#ffffff;
  --surface-2:#f2f6ff;
  --border:rgba(15,27,61,.10);
  --border-strong:rgba(15,27,61,.18);
  --text:#0e1a38;
  --muted:#5a6b8c;
  --brand:#2f6bff;
  --brand-2:#0ea5e9;
  --brand-3:#8b5cff;
  --grad:linear-gradient(100deg,#2f6bff 0%,#0ea5e9 55%,#8b5cff 100%);
  --radius:18px;
  --radius-sm:12px;
  --maxw:1180px;
  --shadow:0 18px 50px rgba(23,43,99,.10);
  --glow:0 0 0 1px rgba(47,107,255,.20),0 10px 30px rgba(47,107,255,.14);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",Inter,system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);font-weight:600;margin-bottom:14px;
  padding:6px 12px;border:1px solid rgba(47,107,255,.30);border-radius:999px;background:rgba(47,107,255,.06)}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
h1,h2,h3,h4{line-height:1.2;font-weight:700;letter-spacing:-.01em}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;font-weight:600;font-size:15px;
  cursor:pointer;border:1px solid transparent;transition:.25s;white-space:nowrap}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06)}
.btn-ghost{border-color:var(--border-strong);color:var(--text);background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:.3s;
  background:rgba(255,255,255,.72);backdrop-filter:blur(14px);border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(255,255,255,.92);border-bottom:1px solid var(--border)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--grad);color:#fff;font-weight:800;font-size:18px;box-shadow:var(--glow)}
.brand-name{font-size:18px;display:flex;flex-direction:column;line-height:1.05}
.brand-sub{font-size:9px;letter-spacing:.18em;color:var(--muted);font-weight:600}
.nav-links{display:flex;gap:26px;margin-left:auto}
.nav-links a{color:var(--muted);font-size:15px;font-weight:500;transition:.2s;position:relative;padding:6px 0}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--grad);border-radius:2px}
.nav-cta{display:flex;align-items:center;gap:10px;margin-left:8px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* ===== Hero ===== */
.hero{position:relative;padding:118px 0 60px;overflow:hidden;
  background:linear-gradient(180deg,#eef3fd 0%,#f6f8fc 70%)}
.hero-bg{position:absolute;inset:0;z-index:0}
.grid-lines{position:absolute;inset:0;
  background-image:linear-gradient(rgba(15,27,61,.05) 1px,transparent 1px),
  linear-gradient(90deg,rgba(15,27,61,.05) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000 30%,transparent 75%)}
.orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.30}
.orb-a{width:420px;height:420px;background:#7ea6ff;top:-80px;left:-60px}
.orb-b{width:380px;height:380px;background:#8fdcf5;top:40px;right:-80px;opacity:.25}
.orb-c{width:320px;height:320px;background:#c3aeff;bottom:-60px;left:40%;opacity:.25}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-title{font-size:clamp(34px,5vw,56px);margin:6px 0 18px}
.hero-lead{color:var(--muted);font-size:17px;max-width:540px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap}
.tag{font-size:13px;color:var(--muted);padding:6px 14px;border:1px solid var(--border);
  border-radius:999px;background:#fff}
.hero-visual{position:relative;display:flex;justify-content:center}
.device{width:340px;max-width:100%;border-radius:30px;padding:14px;
  background:linear-gradient(160deg,rgba(47,107,255,.14),rgba(139,92,255,.10));
  border:1px solid rgba(47,107,255,.22);box-shadow:var(--shadow);backdrop-filter:blur(6px)}
.device-screen{background:#fff;border-radius:22px;padding:18px;border:1px solid var(--border)}
.ds-top{display:flex;justify-content:space-between;align-items:center;font-weight:700;margin-bottom:14px}
.ds-live{font-size:11px;color:#0a8a4a;background:rgba(20,180,100,.12);padding:3px 8px;border-radius:999px;letter-spacing:.1em}
.ds-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.ds-metric{background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:14px}
.ds-metric b{display:block;font-size:26px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.ds-metric span{font-size:12px;color:var(--muted)}
.ds-bar{height:8px;border-radius:8px;background:var(--surface-2);overflow:hidden;margin-bottom:14px}
.ds-bar i{display:block;height:100%;background:var(--grad)}
.ds-list{list-style:none;display:flex;flex-direction:column;gap:9px}
.ds-list li{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:9px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 3px rgba(14,165,233,.15);flex:none}
.scroll-hint{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);width:24px;height:40px;
  border:2px solid var(--border-strong);border-radius:14px;display:flex;justify-content:center;padding-top:7px}
.scroll-hint span{width:4px;height:8px;border-radius:4px;background:var(--brand);animation:scrolldot 1.6s infinite}
@keyframes scrolldot{0%{opacity:0;transform:translateY(0)}40%{opacity:1}100%{opacity:0;transform:translateY(12px)}}

/* ===== 数据 ===== */
.stats{padding:18px 0 4px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{text-align:center;padding:26px 14px;border:1px solid var(--border);border-radius:var(--radius);
  background:#fff;box-shadow:0 6px 24px rgba(23,43,99,.05)}
.stat b{display:block;font-size:clamp(30px,4vw,44px);background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:6px}
.stat span{color:var(--muted);font-size:14px}

/* ===== 通用 section ===== */
.section{padding:52px 0}
.section-alt{background:linear-gradient(180deg,transparent,rgba(47,107,255,.035),transparent)}
.sec-head{max-width:680px;margin:0 auto 32px;text-align:center}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:10px}
.sec-head p{color:var(--muted);font-size:16px}
.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}

/* ===== 卡片 ===== */
.card{position:relative;padding:22px;border-radius:var(--radius);background:#fff;
  border:1px solid var(--border);transition:.3s;overflow:hidden;box-shadow:0 6px 24px rgba(23,43,99,.05)}
.card::before{content:"";position:absolute;inset:0;border-radius:var(--radius);
  padding:1px;background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card-ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:20px;
  background:rgba(47,107,255,.08);border:1px solid rgba(47,107,255,.16);color:var(--brand);margin-bottom:12px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
.card-soft{background:#fbfcff}

/* ===== 案例 ===== */
.case{padding:22px;border-radius:var(--radius);background:#fff;border:1px solid var(--border);transition:.3s;
  box-shadow:0 6px 24px rgba(23,43,99,.05)}
.case:hover{transform:translateY(-6px);border-color:rgba(47,107,255,.35)}
.case-quote{font-size:16px;line-height:1.7;margin-bottom:14px}
.case-meta b{display:block;font-size:15px}
.case-meta span{color:var(--muted);font-size:13px}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ===== 关于 ===== */
.about{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:12px}
.about p{color:var(--muted)}
.about-points{display:flex;flex-direction:column;gap:12px}
.point{display:flex;align-items:center;gap:16px;padding:15px 20px;border-radius:14px;
  background:#fff;border:1px solid var(--border);box-shadow:0 6px 24px rgba(23,43,99,.05)}
.point b{font-size:18px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;min-width:74px}
.point span{color:var(--muted)}

/* ===== CTA ===== */
.cta{padding:56px 0 64px}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;
  padding:38px;border-radius:24px;background:
  radial-gradient(120% 140% at 0% 0%,rgba(47,107,255,.10),transparent 55%),
  radial-gradient(120% 140% at 100% 100%,rgba(139,92,255,.08),transparent 55%),
  #fff;border:1px solid rgba(47,107,255,.22);box-shadow:var(--shadow)}
.cta-copy h2{font-size:clamp(24px,3vw,34px);margin-bottom:12px}
.cta-copy p{color:var(--muted)}
.cta-form{display:flex;flex-direction:column;gap:12px}
.cta-form input{padding:14px 16px;border-radius:12px;border:1px solid var(--border-strong);
  background:#fff;color:var(--text);font-size:15px;outline:none;transition:.2s}
.cta-form input:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(14,165,233,.15)}
.cta-form .btn{margin-top:4px}
.form-tip{font-size:13px;color:var(--brand);min-height:18px}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--border);padding:40px 0 22px;background:#eef2f9}
.footer-inner{display:grid;grid-template-columns:1.4fr 2fr;gap:36px}
.footer-brand p{color:var(--muted);font-size:14px;margin-top:12px;max-width:280px}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-cols h4{font-size:15px;margin-bottom:12px}
.footer-cols a{display:block;color:var(--muted);font-size:14px;margin-bottom:8px;transition:.2s}
.footer-cols a:hover{color:var(--text)}
.foot-addr{display:block;color:var(--muted);font-size:13px;margin-top:12px;line-height:1.6;max-width:240px}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  margin-top:24px;padding-top:16px;border-top:1px solid var(--border);color:var(--muted);font-size:13px}

/* ===== 动画 ===== */
.reveal{opacity:0;transform:translateY(24px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:-1}
  .about{grid-template-columns:1fr;gap:28px}
  .cta-inner{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
}
@media(max-width:760px){
  .nav-links{position:fixed;top:64px;right:16px;left:16px;flex-direction:column;gap:4px;
    background:rgba(255,255,255,.98);border:1px solid var(--border-strong);border-radius:16px;
    padding:14px;transform:translateY(-12px);opacity:0;pointer-events:none;transition:.25s;box-shadow:var(--shadow)}
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a{padding:10px 12px}
  .burger{display:flex}
  .nav-cta .btn-ghost{display:none}
  .grid-3{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .hero{padding:104px 0 52px}
  .section{padding:42px 0}
  .footer-cols{grid-template-columns:1fr 1fr}
}
@media(max-width:420px){
  .stats-grid{grid-template-columns:1fr}
  .container{padding:0 18px}
}

/* 减少动画偏好 */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}