:root{--ih-border:#e6e8ec;--ih-card:#fff;--ih-muted:#f6f7f9;--ih-text:#111}
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial,sans-serif;color:var(--ih-text);margin:0}
a{color:inherit}
.container{max-width:1200px;margin:0 auto;padding:24px 18px}
.site-header{border-bottom:1px solid var(--ih-border);background:#fff;position:sticky;top:0;z-index:20}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 18px}
.site-title{font-weight:700;font-size:20px;margin:0}
.nav a{margin:0 10px;text-decoration:none}
.hero{position:relative;border-radius:16px;overflow:hidden}
.hero img{width:100%;height:380px;object-fit:cover;display:block}
.hero .inner{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;background:linear-gradient(180deg,rgba(0,0,0,.25),rgba(0,0,0,.5));text-align:center;padding:20px}
.hero h1{margin:0 0 6px;font-size:clamp(28px,4vw,44px)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--ih-card);border:1px solid var(--ih-border);border-radius:16px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.05)}
.card .body{padding:14px 16px}
.card img{width:100%;height:220px;object-fit:cover;display:block}
.btn{display:inline-block;padding:10px 14px;border:1px solid var(--ih-border);border-radius:12px;text-decoration:none}
.announcement{position:relative;margin:24px 0;border-radius:20px;overflow:hidden}
.announcement .bg{height:260px;background-size:cover;background-position:center;filter:brightness(.9)}
.announcement .inner{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;padding:18px}
.quick{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.quick a{display:block;text-align:center;padding:16px;background:var(--ih-muted);border:1px solid var(--ih-border);border-radius:14px;text-decoration:none}
.site-footer{border-top:1px solid var(--ih-border);padding:20px;text-align:center;color:#555;margin-top:40px}
@media (max-width:980px){.grid2{grid-template-columns:1fr}.grid3{grid-template-columns:1fr 1fr}.quick{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.grid3{grid-template-columns:1fr}}
.home .site-header .wrap{display:grid;grid-template-columns:1fr auto 1fr;align-items:center}
.home .site-header .wrap .right{display:flex;justify-content:flex-end;gap:10px}