*{box-sizing:border-box;margin:0;padding:0}
html,body{min-height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color:#1f2937;background:#f7f8fb;line-height:1.6}
a{color:inherit;text-decoration:none}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid #eef0f4}
.nav-inner{max-width:1120px;margin:0 auto;display:flex;align-items:center;
  justify-content:space-between;padding:12px 20px;gap:16px}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#ff7a18,#ff3b30);
  color:#fff;display:grid;place-items:center;font-weight:900;letter-spacing:.5px}
.brand-text b{display:block;font-size:15px}
.brand-text i{display:block;font-style:normal;font-size:11px;color:#94a3b8}
.nav-menu{display:flex;gap:6px;align-items:center}
.nav-menu a{padding:8px 12px;border-radius:8px;font-size:14px;color:#475569}
.nav-menu a:hover{background:#f1f5f9;color:#111827}
.nav-menu a.active{background:#111827;color:#fff}
.nav-toggle{display:none;border:0;background:#f1f5f9;border-radius:8px;
  padding:8px 12px;font-size:18px;color:#334155;cursor:pointer}

/* 主视觉 */
.hero{background:linear-gradient(135deg,#fff7e6 0%,#ffe4d6 40%,#ffe1e8 100%);
  border-bottom:1px solid #f1e3d9}
.hero-inner{max-width:1120px;margin:0 auto;padding:70px 20px 60px;text-align:center}
.hero-badge{display:inline-block;background:rgba(17,24,39,.06);color:#334155;
  padding:6px 14px;border-radius:999px;font-size:12px;letter-spacing:.5px;margin-bottom:18px}
.hero h1{font-size:44px;letter-spacing:1px;background:linear-gradient(135deg,#111827,#ff3b30);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin-top:10px;color:#475569;font-size:16px}
.hero .hero-sub{color:#94a3b8;font-size:14px}
.hero-actions{margin-top:22px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.btn{padding:11px 22px;border-radius:999px;font-weight:700;font-size:14px;
  transition:transform .12s,box-shadow .12s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:#ff3b30;color:#fff;box-shadow:0 10px 24px rgba(255,59,48,.28)}
.btn-ghost{background:#fff;color:#111827;border:1px solid #e5e7eb}

/* 卡片区 */
.cards{max-width:1120px;margin:-30px auto 0;padding:0 20px 50px;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{position:relative;background:#fff;border-radius:18px;padding:22px 20px 18px;
  border:1px solid #eef0f4;box-shadow:0 6px 22px rgba(15,23,42,.05);
  transition:transform .18s,box-shadow .18s,border-color .18s}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(15,23,42,.1);border-color:#e2e8f0}
.card-tag{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:800;
  background:#f1f5f9;color:#475569;margin-bottom:12px}
.tag-pdd{background:#fee2e2;color:#dc2626}
.tag-jd{background:#fee4e2;color:#e11d48}
.tag-tb{background:#fff7d6;color:#a16207}
.tag-mt{background:#fef3c7;color:#b45309}
.card h3{font-size:18px;margin-bottom:6px;color:#111827}
.card p{color:#475569;font-size:13px}
.card-meta{margin-top:14px;color:#94a3b8;font-size:12px}
.card-cta{display:inline-block;margin-top:14px;color:#ff3b30;font-weight:800;font-size:14px}
.card-cta:hover{text-decoration:underline}

/* 页脚 */
.footer{text-align:center;color:#94a3b8;font-size:13px;padding:30px 20px 50px;line-height:2}
.footer a{color:#475569;border-bottom:1px dashed #cbd5e1}
.footer .icp{color:#cbd5e1;font-size:12px}

@media (max-width:720px){
  .hero h1{font-size:32px}
  .nav-menu{position:absolute;left:0;right:0;top:100%;background:#fff;
    flex-direction:column;align-items:stretch;padding:8px;border-bottom:1px solid #eef0f4;
    display:none}
  .nav-menu.open{display:flex}
  .nav-menu a{padding:12px 14px;border-radius:6px}
  .nav-toggle{display:inline-block}
}