:root{
  --blue:#3b82f6; --cyan:#06b6d4;
  --blue-d:#2563eb; --cyan-d:#0891b2;
  --ink:#111827; --ink2:#374151; --sub:#6b7280; --sub2:#9ca3af;
  --line:#e5e7eb; --bg:#f9fafb;
  --grad:linear-gradient(135deg,var(--blue),var(--cyan));
  --grad-r:linear-gradient(90deg,var(--blue),var(--cyan));
  --r:12px;
  --sh:0 1px 2px rgba(16,24,40,.05);
  --sh-h:0 12px 28px -6px rgba(16,24,40,.12);
  --max:1152px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;
  color:var(--ink);background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ───────── 顶部导航 ───────── */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.82);
  -webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .25s,box-shadow .25s}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 1px 8px rgba(16,24,40,.05)}
.nav .wrap{display:flex;align-items:center;height:70px;gap:40px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:40px;height:40px;border-radius:11px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;
  letter-spacing:-.5px;box-shadow:0 6px 16px rgba(59,130,246,.35)}
.brand-txt strong{display:block;font-size:17.5px;font-weight:800;letter-spacing:.2px;line-height:1.25}
.brand-txt span{display:block;font-size:10.5px;color:var(--sub2);letter-spacing:2.2px}
.nav-links{display:flex;gap:34px;font-size:15px;margin-left:auto}
.nav-links a{color:var(--ink2);transition:color .2s;position:relative;padding:3px 0}
.nav-links a:hover{color:var(--blue-d)}
.nav-cta{height:42px;padding:0 22px;border-radius:999px;display:inline-flex;align-items:center;
  font-size:14.5px;font-weight:600;color:#fff;background:var(--grad);flex-shrink:0;
  box-shadow:0 6px 16px rgba(59,130,246,.3);transition:transform .2s,box-shadow .2s}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(59,130,246,.4)}

/* ───────── Hero ───────── */
.hero{position:relative;overflow:hidden;
  background:linear-gradient(180deg,#eff6ff 0%,#ecfeff 34%,#ffffff 100%);
  padding:84px 0 90px;text-align:center}
.hero::before{content:"";position:absolute;width:760px;height:760px;border-radius:50%;top:-420px;left:50%;
  transform:translateX(-50%);background:radial-gradient(circle,rgba(59,130,246,.14),rgba(59,130,246,0) 66%);pointer-events:none}
.hero::after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;bottom:-320px;right:-140px;
  background:radial-gradient(circle,rgba(6,182,212,.13),rgba(6,182,212,0) 68%);pointer-events:none}
.hero .wrap{position:relative;z-index:2}
.pill{display:inline-flex;align-items:center;gap:8px;height:33px;padding:0 15px;border-radius:999px;
  font-size:13px;font-weight:600;color:var(--blue-d);background:#dbeafe;border:1px solid #bfdbfe;margin-bottom:24px}
.pill i{width:7px;height:7px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 3px rgba(59,130,246,.2)}
.hero h1{font-size:52px;line-height:1.18;font-weight:800;letter-spacing:-1px;margin-bottom:16px}
.hero h1 em{font-style:normal;background:var(--grad-r);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .slogan{font-size:19px;font-weight:600;color:var(--ink2);margin-bottom:14px}
.hero .lead{font-size:16.5px;color:var(--sub);max-width:640px;margin:0 auto 34px}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;height:50px;padding:0 30px;
  border-radius:999px;font-size:15.5px;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s}
.btn-main{color:#fff;background:var(--grad);box-shadow:0 10px 24px -4px rgba(59,130,246,.42)}
.btn-main:hover{transform:translateY(-2px);box-shadow:0 16px 30px -6px rgba(59,130,246,.5)}
.btn-ghost{color:var(--ink2);background:#fff;border:1px solid var(--line);box-shadow:var(--sh)}
.btn-ghost:hover{transform:translateY(-2px);color:var(--blue-d);border-color:#bfdbfe;box-shadow:var(--sh-h)}
.hero-note{font-size:13px;color:var(--sub2)}
.hero-figs{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:40px}
.fig{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);
  padding:16px 26px;min-width:150px}
.fig b{display:block;font-size:24px;font-weight:800;line-height:1.2;
  background:var(--grad-r);-webkit-background-clip:text;background-clip:text;color:transparent}
.fig span{font-size:13px;color:var(--sub)}

/* ───────── 通用区块 ───────── */
.sec{padding:86px 0}
.sec-alt{background:var(--bg)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 52px}
.sec-head .tag{display:inline-block;font-size:13.5px;font-weight:700;color:var(--blue-d);
  background:#dbeafe;border-radius:999px;padding:5px 15px;margin-bottom:16px}
.sec-head h2{font-size:36px;font-weight:800;letter-spacing:-.6px;line-height:1.25;margin-bottom:14px}
.sec-head p{color:var(--sub);font-size:16px}

/* 关于我们 */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:34px}
.about-box{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 28px;box-shadow:var(--sh)}
.about-box h3{font-size:19px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:10px}
.about-box h3::before{content:"";width:4px;height:19px;border-radius:3px;background:var(--grad-r);display:block}
.about-box p{color:var(--sub);font-size:15px;line-height:1.85}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 18px;
  text-align:center;box-shadow:var(--sh)}
.stat b{display:block;font-size:34px;font-weight:800;line-height:1.15;letter-spacing:-1px;
  background:var(--grad-r);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13.5px;color:var(--sub)}

/* 服务内容 */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px;
  box-shadow:var(--sh);transition:transform .22s,box-shadow .22s,border-color .22s}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:#dbeafe}
.ico{width:56px;height:56px;border-radius:var(--r);display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;font-size:22px;font-weight:800;line-height:1}
.ico svg{width:27px;height:27px;stroke-width:2}
.c1{background:#dbeafe;color:#3b82f6}
.c2{background:#cffafe;color:#06b6d4}
.c3{background:#dcfce7;color:#22c55e}
.c4{background:#f3e8ff;color:#a855f7}
.c5{background:#ffedd5;color:#f97316}
.c6{background:#fce7f3;color:#ec4899}
.card h3{font-size:18px;font-weight:700;margin-bottom:9px}
.card p{font-size:14px;color:var(--sub);line-height:1.8}

/* 特色优势 */
.cards4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.adv{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 24px;
  box-shadow:var(--sh);transition:transform .22s,box-shadow .22s}
.adv:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.adv .mark{width:50px;height:50px;border-radius:var(--r);display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;color:#fff;background:var(--grad);margin-bottom:16px;
  box-shadow:0 8px 18px -4px rgba(59,130,246,.45)}
.adv h3{font-size:17px;font-weight:700;margin-bottom:8px}
.adv p{font-size:13.8px;color:var(--sub);line-height:1.8}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:start}
.contact-list{background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:10px 28px;box-shadow:var(--sh)}
.ci{display:flex;gap:16px;padding:22px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.ci:last-child{border-bottom:0}
.ci-ico{width:44px;height:44px;border-radius:11px;background:#dbeafe;color:#3b82f6;flex-shrink:0;
  display:flex;align-items:center;justify-content:center}
.ci-ico svg{width:21px;height:21px;stroke-width:2}
.ci b{display:block;font-size:15px;font-weight:700;margin-bottom:3px}
.ci span{font-size:14.5px;color:var(--sub);word-break:break-all}
.contact-qr{background:linear-gradient(160deg,#eff6ff,#ecfeff);border:1px solid #dbeafe;
  border-radius:var(--r);padding:32px 26px;text-align:center}
.contact-qr h3{font-size:17.5px;font-weight:700;margin-bottom:7px}
.contact-qr p{font-size:13.5px;color:var(--sub);margin-bottom:20px}
.qr-box{width:190px;height:190px;margin:0 auto;background:#fff;border-radius:14px;padding:10px;
  box-shadow:0 8px 22px -6px rgba(59,130,246,.25)}
.qr-box img{width:100%;height:100%;object-fit:contain;border-radius:6px}
.qr-ph{display:flex;align-items:center;justify-content:center;height:100%;font-size:13px;
  color:var(--sub);text-align:center;line-height:1.75}
.contact-qr small{display:block;margin-top:16px;font-size:12.5px;color:var(--sub2)}
.quiet{margin-top:22px;background:#fff;border:1px dashed #e5e7eb;border-radius:var(--r);
  padding:20px 24px;font-size:13.5px;color:var(--sub);line-height:1.85}
.quiet b{color:var(--ink2)}

/* CTA */
.cta{border-radius:20px;padding:56px 40px;text-align:center;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(135deg,#3b82f6,#06b6d4);box-shadow:0 20px 44px -12px rgba(59,130,246,.5)}
.cta::before{content:"";position:absolute;width:440px;height:440px;border-radius:50%;
  background:rgba(255,255,255,.11);top:-240px;right:-120px}
.cta::after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;
  background:rgba(255,255,255,.08);bottom:-200px;left:-90px}
.cta h2{font-size:31px;font-weight:800;letter-spacing:-.5px;margin-bottom:12px;position:relative}
.cta p{font-size:15.5px;opacity:.95;margin-bottom:28px;position:relative;max-width:620px;
  margin-left:auto;margin-right:auto}
.cta .btn{background:#fff;color:var(--blue-d);position:relative;box-shadow:0 10px 24px rgba(0,0,0,.16)}
.cta .btn:hover{transform:translateY(-2px)}

/* 页脚 */
.foot{background:#111827;color:#9ca3af;padding:60px 0 28px;font-size:14px}
.foot-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:34px;border-bottom:1px solid #1f2937}
.foot .brand-mark{width:38px;height:38px;font-size:14px}
.foot .brand-txt strong{color:#fff;font-size:16.5px}
.foot .brand-txt span{color:#6b7280}
.foot-about p{margin-top:16px;line-height:1.9;color:#9ca3af;max-width:330px;font-size:13.5px}
.foot-col h4{color:#fff;font-size:14.5px;font-weight:700;margin-bottom:16px}
.foot-col a{display:block;margin-bottom:11px;font-size:13.5px;color:#9ca3af;transition:color .2s}
.foot-col a:hover{color:#60a5fa}
.foot-col span{display:block;margin-bottom:11px;font-size:13.5px;color:#9ca3af}
.foot-qr{display:inline-flex;flex-direction:column;align-items:center;gap:8px;
  background:#fff;border-radius:12px;padding:10px 10px 8px;margin-top:4px}
.foot-qr img{width:104px;height:104px;display:block;border-radius:6px}
.foot-qr i{font-style:normal;font-size:12px;font-weight:600;color:#374151;letter-spacing:.2px}
.foot-bot{padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#6b7280}
.foot-icp:empty{display:none}
.foot-icp a{color:#6b7280;transition:color .2s}
.foot-icp a:hover{color:#60a5fa}

/* 进场动画 */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rv.on{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1024px){
  .nav-links{display:none}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .cards3{grid-template-columns:repeat(2,1fr)}
  .cards4,.stats{grid-template-columns:repeat(2,1fr)}
  .foot-top{grid-template-columns:1fr 1fr;gap:30px}
  .hero h1{font-size:40px}
}
@media (max-width:640px){
  .wrap{padding:0 18px}
  .hero{padding:56px 0 62px}
  .hero h1{font-size:31px;letter-spacing:-.5px}
  .hero .slogan{font-size:16.5px}
  .hero .lead{font-size:15px}
  .sec{padding:58px 0}
  .sec-head h2{font-size:26px}
  .about-grid,.cards3,.cards4,.stats{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr}
  .brand-txt span{display:none}
  .cta{padding:40px 22px}
  .cta h2{font-size:23px}
  .btn{width:100%}
  .hero-btns{gap:10px}
  .fig{flex:1 1 40%;min-width:0;padding:14px 12px}
}

/* ───────── 导航当前页 ───────── */
.nav-links a.is-on{color:var(--blue-d);font-weight:600}
.nav-links a.is-on::after{content:"";position:absolute;left:0;right:0;bottom:-5px;
  height:2px;border-radius:2px;background:var(--grad-r)}

/* ───────── 内页页头 ───────── */
.pagehead{position:relative;overflow:hidden;
  background:linear-gradient(180deg,#eff6ff 0%,#ecfeff 40%,#ffffff 100%);
  padding:64px 0 58px;text-align:center}
.pagehead .tag{display:inline-block;font-size:13.5px;font-weight:700;color:var(--blue-d);
  background:#dbeafe;border-radius:999px;padding:5px 15px;margin-bottom:16px}
.pagehead h1{font-size:40px;font-weight:800;letter-spacing:-.8px;line-height:1.22;margin-bottom:14px}
.pagehead .ph-sub{font-size:18px;font-weight:600;color:var(--ink2);margin-bottom:10px}
.pagehead p{color:var(--sub);font-size:16px;max-width:660px;margin:0 auto}
.crumb{font-size:13px;color:var(--sub2);margin-bottom:18px}
.crumb a{color:var(--sub2)}
.crumb a:hover{color:var(--blue-d)}

/* ───────── 首页摘要卡 ───────── */
.brief-more{text-align:center;margin-top:34px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.adv-line{display:flex;align-items:flex-start;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}
.adv-line:last-child{border-bottom:0}
.adv-line .mark{width:38px;height:38px;border-radius:10px;flex-shrink:0;display:flex;
  align-items:center;justify-content:center;font-size:15px;font-weight:800;color:#fff;background:var(--grad)}
.adv-line b{display:block;font-size:15.5px;font-weight:700;margin-bottom:3px}
.adv-line span{font-size:14px;color:var(--sub)}

@media (max-width:1024px){ .two-col{grid-template-columns:1fr} }
@media (max-width:640px){
  .pagehead{padding:44px 0 40px}
  .pagehead h1{font-size:28px}
  .pagehead p{font-size:15px}
}