*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Noto Sans","PingFang SC","Microsoft YaHei";color:#fff;background:#0c1020}
a{color:inherit;text-decoration:none}
.bg{position:fixed;inset:0;background:var(--bg-color) center/cover no-repeat;filter:saturate(1.05);transform:scale(1.02)}
.shade{position:fixed;inset:0;background:linear-gradient(180deg,rgba(8,10,20,.62),rgba(8,10,20,.80))}
.wrap{position:relative;min-height:100%;padding:18px 14px 86px;max-width:900px;margin:0 auto}
.header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.title{font-weight:800;font-size:18px;letter-spacing:.3px}
.sub{opacity:.82;font-size:12px}
.group{margin-top:14px}
.group-title{font-weight:700;font-size:14px;margin:0 0 10px 0;opacity:.95;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;user-select:none}
.group-title::before{content:'';width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-top:6px solid currentColor;transition:transform .2s}
.group-icon{width:20px;height:20px;border-radius:50%;object-fit:cover;border:1px solid rgba(255,255,255,0.2)}
.group.collapsed .group-title::before{transform:rotate(-90deg)}
.group.collapsed .group-icon{display:none}
.group.collapsed .card{display:none}
.card{border-radius:16px;padding:12px 12px 14px;backdrop-filter:blur(10px)}
.links{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:10px}
.link{display:flex;align-items:center;justify-content:center;text-align:center;min-height:44px;padding:10px 12px;border-radius:14px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.14);font-weight:650}
.link:active{transform:scale(.98)}
.empty{opacity:.8;font-size:13px}
.music-btn{position:fixed;right:14px;bottom:18px;z-index:10;display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:999px;background:rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(10px)}
.music-dot{width:10px;height:10px;border-radius:999px;background:#9cff57;box-shadow:0 0 0 3px rgba(156,255,87,.18)}
.music-dot.off{background:#ff6b6b;box-shadow:0 0 0 3px rgba(255,107,107,.18)}
@media (min-width:520px){
  .links{grid-template-columns:repeat(3,minmax(0,1fr))}
}