:root{
  --bg:#f4f7fe;
  --surface:#ffffff;
  --line:rgba(30,60,120,.12);
  --ink:#111a30;
  --muted:#5d6c8c;
  --c1:#0a8fc4;
  --c2:#5240d6;
  --c3:#0aa876;
  --grad:linear-gradient(100deg,#0a8fc4,#5240d6 55%,#0aa876);
  --shadow-sm:0 6px 22px rgba(40,70,140,.06);
  --shadow-md:0 18px 42px rgba(40,70,140,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(920px 520px at 10% -6%,rgba(31,182,232,.16),transparent 60%),
    radial-gradient(820px 540px at 90% 6%,rgba(107,92,255,.14),transparent 62%),
    radial-gradient(760px 620px at 48% 104%,rgba(18,199,149,.12),transparent 66%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.25}
.shell{width:min(1180px,92vw);margin:0 auto}

/* 顶部导航 */
.top{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.82);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px}
.brand img{height:34px;width:auto}
.menu{display:none;background:rgba(30,60,120,.06);border:1px solid var(--line);color:var(--ink);font-size:18px;border-radius:10px;padding:6px 12px;cursor:pointer}
.links{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.links a{padding:9px 14px;border-radius:999px;font-size:15px;color:var(--muted);transition:.25s;white-space:nowrap}
.links a:hover{color:var(--ink);background:rgba(30,60,120,.06)}
.links a.active{color:#fff;font-weight:700;background:linear-gradient(100deg,#0a8fc4,#0aa876);box-shadow:0 8px 20px rgba(10,143,196,.25)}
.links a.lang{border:1px solid var(--line);color:var(--ink);margin-left:6px}
.links a.lang:hover{border-color:var(--c1);color:var(--c1);background:transparent}

/* Hero */
.hero{padding:80px 0 58px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:center}
.eyebrow{display:inline-block;font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--c1);
  border:1px solid rgba(10,143,196,.28);background:rgba(10,143,196,.06);padding:7px 15px;border-radius:999px;margin-bottom:24px}
.hero h1{font-size:clamp(34px,5vw,58px);font-weight:800;letter-spacing:-.015em;margin:0 0 22px;color:var(--ink)}
.gradient{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:17px;margin:0 0 26px;max-width:58ch}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:0 0 30px}
.chips li{font-size:13.5px;color:#33415c;background:rgba(30,60,120,.05);border:1px solid var(--line);padding:7px 14px;border-radius:999px}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 27px;border-radius:999px;font-weight:700;font-size:15.5px;
  background:linear-gradient(100deg,#0a8fc4,#5240d6 58%,#0aa876);color:#fff;
  box-shadow:0 14px 34px rgba(60,90,200,.22);transition:.25s}
.btn:hover{transform:translateY(-2px);box-shadow:0 20px 44px rgba(60,90,200,.32)}
.btn.secondary{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.btn.secondary:hover{border-color:var(--c1);color:var(--c1);transform:translateY(-2px)}
.note{margin:0;color:#7c8aab;font-size:13.5px}
.hero-art img{width:100%;border-radius:22px;border:1px solid var(--line);box-shadow:0 28px 66px rgba(40,70,140,.16);background:#fff}

/* 数据条 */
.stats{padding:6px 0 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:26px 20px;border:1px solid var(--line);border-radius:22px;
  background:var(--surface);box-shadow:var(--shadow-sm)}
.stat{text-align:center;padding:8px 12px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:21px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:4px}
.stat span{font-size:14px;color:var(--muted)}

/* 通用版块 */
.section{padding:78px 0}
.section.alt{padding-top:0}
.section-head{max-width:760px;margin:0 auto 42px;text-align:center}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.01em;margin:14px 0 14px;color:var(--ink)}
.section-head p{color:var(--muted);margin:0}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
.step{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:var(--shadow-sm);transition:.3s}
.step:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.step b{font-size:12.5px;letter-spacing:.18em;color:var(--c3)}
.step h3{margin:10px 0 8px;font-size:18.5px}
.step p{margin:0;color:var(--muted);font-size:14.5px}

/* 卡片网格 */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:28px;
  overflow:hidden;transition:.3s;box-shadow:var(--shadow-sm)}
.card::after{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:var(--grad);opacity:0;transition:.3s}
.card:hover{transform:translateY(-5px);border-color:rgba(10,143,196,.35);box-shadow:var(--shadow-md)}
.card:hover::after{opacity:1}
.card .icon{font-size:12.5px;font-weight:800;letter-spacing:.16em;color:var(--c1);margin-bottom:14px}
.card h3{margin:0 0 10px;font-size:19px}
.card p{margin:0;color:var(--muted);font-size:15px}

/* 分割布局 */
.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:52px;align-items:center}
.split h2{font-size:clamp(25px,3.2vw,36px);font-weight:800;margin:14px 0 16px;letter-spacing:-.01em}
.split .lead{font-size:16px;margin-bottom:0}
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.checklist li{display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:19px 20px;transition:.3s;box-shadow:var(--shadow-sm)}
.checklist li:hover{border-color:rgba(10,168,118,.4);transform:translateX(4px);box-shadow:var(--shadow-md)}
.checklist .dot{flex:0 0 auto;width:10px;height:10px;margin-top:9px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(10,143,196,.1)}
.checklist b{display:block;font-size:16px;margin-bottom:4px}
.checklist p{margin:0;color:var(--muted);font-size:14.5px}

/* 指标网格 */
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.metric{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px 20px;text-align:center;transition:.3s;box-shadow:var(--shadow-sm)}
.metric:hover{border-color:rgba(10,143,196,.4);transform:translateY(-4px);box-shadow:var(--shadow-md)}
.metric b{display:block;font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:6px}
.metric span{font-size:13.5px;color:var(--muted);display:block}
.metric small{display:block;margin-top:10px;color:#8895b3;font-size:12.5px}

/* 场景网格 */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.scene{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:28px;transition:.3s;box-shadow:var(--shadow-sm)}
.scene:hover{border-color:rgba(82,64,214,.35);transform:translateY(-4px);box-shadow:var(--shadow-md)}
.scene .tag{font-size:12px;letter-spacing:.14em;color:var(--c3);border:1px solid rgba(10,168,118,.35);background:rgba(10,168,118,.06);padding:3px 10px;border-radius:999px;display:inline-block;margin-bottom:14px}
.scene h3{margin:0 0 10px;font-size:19px}
.scene p{margin:0;color:var(--muted);font-size:14.5px}

/* 常见问题预览 */
.faq-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;transition:.3s;box-shadow:var(--shadow-sm)}
.faq-item:hover{border-color:rgba(10,143,196,.4);box-shadow:var(--shadow-md)}
.faq-item h4{margin:0 0 10px;font-size:16.5px}
.faq-item p{margin:0;color:var(--muted);font-size:14px}
.faq-item a{color:var(--c1);font-size:13.5px;display:inline-block;margin-top:10px;font-weight:600}

/* 用户评价 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:var(--shadow-sm);transition:.3s}
.review:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.review .quote{font-size:28px;line-height:1;color:var(--c1);margin-bottom:10px}
.review p{margin:0 0 16px;color:#3a4763;font-size:15px}
.review .who{font-size:13.5px;color:var(--muted)}

/* CTA */
.band{padding:10px 0 84px}
.band-inner{display:flex;align-items:center;justify-content:space-between;gap:38px;border-radius:26px;padding:44px 48px;
  border:1px solid rgba(30,60,120,.14);
  background:linear-gradient(115deg,rgba(31,182,232,.16),rgba(107,92,255,.16) 52%,rgba(18,199,149,.16));
  box-shadow:var(--shadow-sm)}
.band h2{margin:0 0 10px;font-size:clamp(23px,2.8vw,31px);font-weight:800}
.band p{margin:0;color:#3f4d6b}

/* 页脚 */
.footer{border-top:1px solid var(--line);padding:58px 0 30px;background:rgba(255,255,255,.7)}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:38px}
.footer-logo{height:32px;width:auto;margin-bottom:16px}
.footer p{color:var(--muted);font-size:14.5px;margin:0;max-width:38ch}
.footer-col h4{font-size:15px;margin:0 0 15px}
.footer-col a{display:block;color:var(--muted);font-size:14.5px;margin-bottom:10px;transition:.22s}
.footer-col a:hover{color:var(--c1)}
.copyright{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);margin-top:46px;padding-top:20px;color:var(--muted);font-size:13.5px}

/* 响应式 */
@media (max-width:1000px){
  .hero{padding:60px 0 46px}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(3),.stat:nth-child(4){border-top:1px solid var(--line);padding-top:18px}
  .grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:34px}
  .steps{grid-template-columns:1fr}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:1fr}
  .faq-mini{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .band-inner{flex-direction:column;align-items:flex-start;padding:36px 32px}
}
@media (max-width:720px){
  .menu{display:inline-flex}
  .links{display:none;position:absolute;top:74px;left:0;right:0;flex-direction:column;align-items:stretch;gap:4px;
    padding:12px 4vw 18px;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);box-shadow:0 18px 40px rgba(40,70,140,.1)}
  .links.open{display:flex}
  .links a{padding:12px 14px;border-radius:12px}
  .links a.lang{margin-left:0;text-align:center}
  .grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line);padding-bottom:16px}
  .stat:nth-child(3){border-top:0}
  .stat:last-child{border-bottom:0;padding-bottom:8px}
  .section{padding:60px 0}
  .band{padding-bottom:64px}
  .band-inner{padding:30px 24px}
  .footer-grid{grid-template-columns:1fr}
  .copyright{flex-direction:column;gap:6px}
  .metrics-grid{grid-template-columns:1fr}
}