:root{
  --brand:#e4393c;
  --brand-dark:#c8262a;
  --ink:#1b1f24;
  --sub:#5b6470;
  --line:#e8ecf1;
  --bg:#f6f7f9;
  --radius:14px;
  --max:1120px;
}
*{box-sizing:border-box;-webkit-text-size-adjust:100%}
html,body{margin:0;padding:0}
body{
  background:#fff;color:var(--ink);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 22px}

/* ============ 顶部导航 ============ */
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.5px}
.brand-text em{font-style:normal;font-size:12px;font-weight:400;color:var(--sub);margin-left:6px}
.topnav{display:flex;gap:26px;font-size:15px;color:var(--sub)}
.topnav a:hover{color:var(--brand)}

/* ============ 首屏 ============ */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#241a1a 0%,#43201f 42%,var(--brand) 130%);
}
.hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(228,57,60,.55),rgba(228,57,60,0) 65%);
}
.hero-inner{position:relative;padding:96px 22px 104px}
.hero-tag{
  display:inline-block;padding:5px 12px;border:1px solid rgba(255,255,255,.35);border-radius:999px;
  font-size:13px;letter-spacing:1px;color:rgba(255,255,255,.88)
}
.hero h1{margin:20px 0 16px;font-size:42px;line-height:1.28;letter-spacing:1px}
.hero h1 span{color:#ffd7d8}
.hero p{margin:0;max-width:640px;font-size:16px;color:rgba(255,255,255,.82)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:600;transition:.2s;
}
.btn-primary{background:#fff;color:var(--brand-dark)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(0,0,0,.22)}
.btn-ghost{border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* ============ 数据条 ============ */
.stats{border-bottom:1px solid var(--line);background:#fff}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:34px 22px}
.stat{text-align:center}
.stat b{display:block;font-size:26px;color:var(--brand)}
.stat span{font-size:13px;color:var(--sub)}

/* ============ 通用区块 ============ */
.section{padding:76px 0}
.section.alt{background:var(--bg)}
.section-head{max-width:680px;margin-bottom:40px}
.section-head .eyebrow{color:var(--brand);font-size:13px;font-weight:700;letter-spacing:2px}
.section-head h2{margin:10px 0 12px;font-size:30px;line-height:1.35}
.section-head p{margin:0;color:var(--sub)}

.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;
  transition:.2s;
}
.card:hover{border-color:#f3c5c6;box-shadow:0 12px 30px rgba(20,24,31,.07);transform:translateY(-2px)}
.card .ico{
  width:44px;height:44px;border-radius:12px;background:#fdeceb;color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px;
}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--sub);font-size:14.5px}

/* ============ 产品 ============ */
.product{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.product-copy h2{margin:8px 0 14px;font-size:30px;line-height:1.35}
.product-copy p{color:var(--sub);margin:0 0 18px}
.feature-list{list-style:none;margin:0 0 26px;padding:0}
.feature-list li{position:relative;padding-left:24px;margin-bottom:10px;color:#333a44}
.feature-list li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;background:var(--brand);
}
.phone{
  position:relative;margin:0 auto;width:280px;height:560px;border-radius:36px;background:#fff;
  border:1px solid var(--line);box-shadow:0 26px 60px rgba(20,24,31,.16);padding:16px;overflow:hidden;
}
.phone::before{
  content:"";position:absolute;left:50%;transform:translateX(-50%);top:10px;width:96px;height:6px;
  border-radius:99px;background:#e9ecf1;
}
.phone-screen{
  height:100%;border-radius:24px;overflow:hidden;
  background:linear-gradient(160deg,#fff2f2,#ffe3e4 55%,#ffd0d2);
  display:flex;flex-direction:column;justify-content:space-between;padding:26px 18px 18px;
}
.phone-title{font-size:19px;font-weight:700;color:#a3200f;line-height:1.4}
.phone-sub{font-size:13px;color:#b4544a;margin-top:8px}
.phone-cards{display:grid;gap:8px}
.phone-card{background:rgba(255,255,255,.86);border-radius:12px;padding:10px 12px;font-size:12.5px;color:#7a3b34}
.phone-badge{
  align-self:flex-start;background:var(--brand);color:#fff;font-size:12px;padding:5px 12px;border-radius:999px;
}

/* ============ 关于 ============ */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.about-text p{color:var(--sub);margin:0 0 14px}
.about-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.about-box dl{margin:0;display:grid;grid-template-columns:96px 1fr;row-gap:14px;font-size:14.5px}
.about-box dt{color:var(--sub)}
.about-box dd{margin:0;color:var(--ink)}

/* ============ 联系 ============ */
.contact{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact .card{text-align:left}
.contact .card b{display:block;font-size:15px;margin-bottom:6px}
.contact .card span{color:var(--sub);font-size:14px;word-break:break-all}

/* ============ 页脚 ============ */
.footer{background:#14181d;color:rgba(255,255,255,.72);padding:34px 0;font-size:13.5px}
.footer-inner{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:24px}
.footer-brand{color:#fff;font-size:15px;margin:0 0 6px;font-weight:600}
.footer-note{margin:0;color:rgba(255,255,255,.55)}
.footer a{margin-right:18px;color:rgba(255,255,255,.78)}
.footer a:hover{color:#fff}
.footer-legal{text-align:right}
.footer-legal p{margin:0 0 6px}
.footer-legal a{display:inline;margin:0;color:rgba(255,255,255,.78)}

/* ============ 法律文书页 ============ */
.doc{padding:44px 22px 60px;max-width:860px}
.doc h1{margin:0 0 6px;font-size:25px;text-align:center}
.doc h2{margin:28px 0 8px;font-size:17.5px}
.doc p{margin:10px 0;color:#333a44;text-align:justify;word-break:break-word}
.doc a{color:#0a66c2;word-break:break-all}

/* ============ 响应式 ============ */
@media (max-width:900px){
  .hero h1{font-size:32px}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-2,.contact,.footer-inner,.product,.about-grid{grid-template-columns:1fr}
  .phone{width:250px;height:500px}
  .footer-legal{text-align:left}
  .section{padding:56px 0}
  .hero-inner{padding:70px 22px 78px}
}
@media (max-width:520px){
  .topnav{display:none}
  .hero h1{font-size:27px}
  .section-head h2,.product-copy h2{font-size:23px}
}