:root{--bg:#f4f6fb;--card:#fff;--text:#1f2937;--sub:#6b7280;--line:#e8ecf3;--pri:#4f46e5;--pri-soft:#eef0ff;--side-w:248px;--radius:14px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:14px;-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
button{font-family:inherit}

/* 侧栏 */
.side{position:fixed;top:0;bottom:0;left:0;width:var(--side-w);background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:50;transition:transform .28s ease}
.brand{display:flex;align-items:center;gap:10px;padding:18px 20px;border-bottom:1px solid var(--line)}
.brand img,.brand-ph{width:36px;height:36px;border-radius:10px;object-fit:cover;flex-shrink:0}
.brand-ph{display:flex;align-items:center;justify-content:center;background:var(--pri-soft);font-size:20px}
.brand-name{font-size:17px;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.menu{flex:1;overflow-y:auto;padding:12px 10px}
.menu-title{padding:10px 12px 6px;font-size:12px;color:#9ca3af}
.menu a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:#4b5563;margin-bottom:2px;transition:background .2s,color .2s,transform .2s}
.menu a:hover{background:#f3f4f8;transform:translateX(2px)}
.menu a.active{background:var(--pri-soft);color:var(--pri);font-weight:600}
.menu .mi{width:22px;height:22px;border-radius:6px;object-fit:cover;flex-shrink:0}
.menu .mi-ph{display:inline-flex;align-items:center;justify-content:center;background:#eef0f6;color:#6b7280;font-size:12px;font-weight:700}
.menu .mt{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 主区域 */
.main{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column}
.top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;padding:12px 28px;background:rgba(244,246,251,.88);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:12px;background:#fff;font-size:18px;cursor:pointer;flex-shrink:0}
.search{flex:1;max-width:560px;position:relative}
.search input{width:100%;height:42px;border:1px solid var(--line);border-radius:21px;padding:0 18px 0 42px;background:#fff;font-size:14px;outline:none;transition:box-shadow .2s,border-color .2s;-webkit-appearance:none;appearance:none}
.search input:focus{border-color:var(--pri);box-shadow:0 0 0 4px rgba(79,70,229,.1)}
.search .si{position:absolute;left:16px;top:50%;transform:translateY(-50%);font-size:14px;opacity:.55;pointer-events:none}
.auth{margin-left:auto;display:flex;gap:10px;align-items:center}
.btn{height:38px;padding:0 18px;border-radius:19px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:14px;color:var(--text);transition:.2s;white-space:nowrap}
.btn:hover{border-color:var(--pri);color:var(--pri)}
.btn-primary{background:var(--pri);border-color:var(--pri);color:#fff}
.btn-primary:hover{background:#4338ca;border-color:#4338ca;color:#fff}
.content{flex:1;padding:6px 28px 30px}

/* 分类 + 卡片 */
.cat{padding-top:18px;scroll-margin-top:72px}
.cat-title{display:flex;align-items:center;gap:8px;font-size:17px;margin:0 0 14px}
.cat-title .ci{width:22px;height:22px;border-radius:6px;object-fit:cover}
.cat-title em{font-style:normal;font-size:12px;color:#9ca3af;background:#eceff5;border-radius:10px;padding:1px 8px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);transition:transform .22s ease,box-shadow .22s ease,border-color .22s;animation:rise .45s ease both;animation-delay:calc(var(--i,0) * 35ms)}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(79,70,229,.12);border-color:#d9defa}
.card-link{display:flex;gap:12px;padding:14px 40px 14px 14px;align-items:center}
.card-ico{width:44px;height:44px;border-radius:12px;object-fit:cover;background:#f3f4f8;flex-shrink:0}
.card-ph{display:flex;align-items:center;justify-content:center;background:var(--pri-soft);color:var(--pri);font-weight:700;font-size:18px}
.card-body{min-width:0;display:block}
.card-name{display:block;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card-desc{display:-webkit-box;margin-top:3px;min-height:18px;color:var(--sub);font-size:12px;line-height:1.5;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.fav{position:absolute;top:8px;right:8px;width:28px;height:28px;border:none;background:transparent;border-radius:50%;cursor:pointer;color:#c3c9d6;font-size:17px;line-height:1;transition:.2s}
.fav:hover{color:#f59e0b;background:#fff7e6;transform:scale(1.15)}
.fav.on{color:#f59e0b}
.is-hidden{display:none!important}
.empty{text-align:center;color:#9ca3af;padding:90px 0}

.foot{padding:18px 28px 26px;color:#9ca3af;font-size:12px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.foot a:hover{color:var(--pri)}

.toast{position:fixed;top:22px;left:50%;transform:translate(-50%,-10px);background:#1f2937;color:#fff;padding:10px 22px;border-radius:12px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:200}
.toast.show{opacity:1;transform:translate(-50%,0)}

.side-mask{display:none}

@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* 手机 / 平板 */
@media (max-width:860px){
    .side{transform:translateX(-100%)}
    body.side-open .side{transform:none;box-shadow:0 0 40px rgba(0,0,0,.2)}
    .side-mask{display:block;position:fixed;inset:0;background:rgba(15,23,42,.4);opacity:0;pointer-events:none;transition:.28s;z-index:40}
    body.side-open .side-mask{opacity:1;pointer-events:auto}
    .main{margin-left:0}
    .burger{display:flex;align-items:center;justify-content:center}
    .top{padding:10px 14px;gap:10px}
    .content{padding:4px 14px 24px}
    .grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .card-link{padding:12px 32px 12px 12px;gap:10px}
    .card-ico{width:38px;height:38px;border-radius:10px}
    .btn{padding:0 14px}
}
@media (max-width:640px){
    .top{flex-wrap:wrap}
    .search{order:3;flex-basis:100%;max-width:none}
    .auth{margin-left:auto}
}
@media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}