:root{
  --red:#EA1F29;
  --red-dark:#c4171f;
  --dark:#111111;
  --ink:#1c1c1e;
  --muted:#6b7280;
  --line:#e8e8ea;
  --bg:#ffffff;
  --bg-soft:#f6f7f9;
  --radius:14px;
  --shadow:0 10px 30px rgba(17,17,17,.08);
  --shadow-sm:0 4px 14px rgba(17,17,17,.06);
  --maxw:1160px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Hanken Grotesk',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.link{color:var(--red);font-weight:600}
.link:hover{text-decoration:underline}

/* 中英双语切换：默认中文，body.lang-en 时显示英文 */
body.lang-en .zh{display:none !important}
body:not(.lang-en) .en{display:none !important}

/* Header */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.header.scrolled{box-shadow:var(--shadow-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand img{height:36px;width:auto}
.lang-switch{display:inline-flex;border:1.5px solid var(--line);border-radius:999px;overflow:hidden}
.lang-btn{font-family:inherit;font-size:14px;font-weight:600;border:0;background:#fff;color:var(--muted);padding:8px 16px;cursor:pointer;transition:.15s}
.lang-btn + .lang-btn{border-left:1.5px solid var(--line)}
.lang-btn.active{background:var(--red);color:#fff}

/* Hero */
.hero{padding:80px 0 64px;background:radial-gradient(1100px 460px at 80% -10%,rgba(234,31,41,.08),transparent 60%),var(--bg)}
.hero-center{text-align:center;max-width:840px;margin:0 auto 40px}
.hero h1{font-size:clamp(34px,5.4vw,60px);line-height:1.12;font-weight:800;letter-spacing:-.5px;color:var(--ink)}

/* 头图：放大、满宽、轻微出血 */
.banner-hero{max-width:1400px;margin:0 auto;padding:0 18px}
.banner-hero img{width:100%;border-radius:24px;box-shadow:0 24px 60px rgba(17,17,17,.14);border:1px solid var(--line);display:block}

/* Sections */
section.block{padding:80px 0}
.bg-soft{background:var(--bg-soft)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.4px}

/* 业务范围：编号式创意卡片（无描述文字） */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pillar{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:36px 28px;overflow:hidden;transition:.2s}
.pillar::before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--red);transform:scaleY(0);transform-origin:bottom;transition:.25s}
.pillar:hover{box-shadow:var(--shadow);transform:translateY(-4px);border-color:transparent}
.pillar:hover::before{transform:scaleY(1)}
.pillar .num{display:block;font-size:46px;font-weight:800;line-height:1;color:rgba(234,31,41,.16);margin-bottom:18px;letter-spacing:-1px}
.pillar h3{font-size:24px;font-weight:800;letter-spacing:-.3px;display:flex;flex-direction:column;gap:4px}
.pillar h3 .en{font-size:15px;font-weight:600;color:var(--muted);letter-spacing:.2px}

/* 联系我们：标题与“业务范围”统一（居中），内容整体居中摆布 */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;max-width:920px;margin:0 auto}

.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start}
.info-list{display:grid;gap:16px}
.info-card{display:flex;gap:16px;align-items:flex-start;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.info-card .ic{width:44px;height:44px;border-radius:11px;background:rgba(234,31,41,.10);color:var(--red);display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:800;flex:0 0 auto}
.info-card h3{font-size:15px;margin-bottom:3px}
.info-card p{color:var(--muted);font-size:14px;word-break:break-all}
.info-card p.muted{color:var(--muted)}
.qr-grid{display:grid;grid-template-columns:1fr;max-width:260px;gap:0;margin:0 auto;justify-items:center}
.qr-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-align:center;transition:.18s}
.qr-card:hover{box-shadow:var(--shadow)}
.qr-card img{width:100%;max-width:220px;margin:0 auto 12px;border-radius:10px;border:1px solid var(--line)}
.qr-card figcaption{font-size:14px;font-weight:600;color:var(--ink)}

/* Footer */
.footer{background:var(--dark);color:#cfcfd4;padding:30px 0}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#9a9aa1}
.icp{opacity:.8}
.icp-link{color:inherit;font-weight:500;text-decoration:none}
.icp-link:hover{text-decoration:underline}

/* Responsive */
@media (max-width:900px){
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .pillars{grid-template-columns:1fr;max-width:520px;margin:0 auto}
}
@media (max-width:640px){
  .hero{padding:52px 0 44px}
  section.block{padding:56px 0}
  .banner-hero{padding:0 12px}
  .banner-hero img{border-radius:16px}
  .qr-grid{grid-template-columns:1fr;max-width:280px;margin:0 auto}
  .footer-bottom{flex-direction:column}
}