/* 简单重置 */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f7f9fb;
  --bg-end:#e9eef7;
  --header-bg: linear-gradient(90deg, rgba(79,70,229,0.08), rgba(96,165,250,0.06));
  --header-border: rgba(15,23,42,0.06);
  --card:#ffffff;
  --text:#0f1720;
  --muted:#556074;
  --accent:#4f46e5;
  --shadow: 0 6px 20px rgba(28,43,60,0.06);
  --glass: rgba(255,255,255,0.6);
}

/* 暗色 */
.dark{
  --bg:#000000;
  --bg-end:#000000;
  --header-bg: linear-gradient(90deg, rgba(124,92,255,0.12), rgba(99,102,241,0.06));
  --header-border: rgba(255,255,255,0.04);
  --card:#0f1722;
  --text:#e6eef8;
  --muted:#98a0b2;
  --accent:#7c5cff;
  --shadow: 0 8px 24px rgba(2,6,23,0.6);
  --glass: rgba(255,255,255,0.02);
}

.header-inner{position:relative}
.logo{position:absolute;left:50%;transform:translateX(-50%);z-index:1;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:calc(100% - 140px);text-align:center}
.controls{position:absolute;right:1rem;top:50%;transform:translateY(-50%);z-index:2;display:flex;gap:0.5rem;align-items:center}
html,body{height:100%;font-family:Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;background:linear-gradient(180deg,var(--bg),var(--bg-end));color:var(--text);}
.container{max-width:1000px;margin:0 auto;padding:1rem;}

.site-header{backdrop-filter: blur(6px);background:var(--header-bg), var(--glass);border-bottom:1px solid var(--header-border);padding:1.6rem 0;margin-bottom:1.5rem;box-shadow:0 6px 18px rgba(15,23,32,0.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:1rem 0}
.logo{font-size:1.25rem;font-weight:700;letter-spacing:0.2px}
.controls{display:flex;gap:0.5rem;align-items:center}
.btn{background:var(--card);border:1px solid rgba(15,23,32,0.06);padding:0.45rem;border-radius:8px;cursor:pointer}
.btn{background:var(--card);border:1px solid rgba(15,23,32,0.06);padding:0.45rem;border-radius:8px;cursor:pointer}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin-top:1.2rem}
.card{background:var(--card);border-radius:12px;box-shadow:var(--shadow);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
.card:focus-within,.card:hover{transform:translateY(-6px)}
.card-link{display:flex;gap:1rem;color:inherit;text-decoration:none;padding:1rem;align-items:center}
.card-media{width:56px;height:56px;background:linear-gradient(135deg,var(--accent),#60a5fa);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.4rem;color:white}
.card-body{flex:1}
.card-title{font-size:1.05rem;margin-bottom:0.25rem}
.card-desc{color:var(--muted);font-size:0.95rem;margin-bottom:0.5rem}
.card-domain{font-size:0.8rem;color:var(--muted)}

.hidden{display:none !important}

/* 小屏优化 */
@media (max-width:460px){
  .card-link{padding:0.8rem}
  .card-media{width:48px;height:48px}
}

/* 辅助样式 */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hidden{display:none !important}