/* assets/style.css —— 前台样式 v2（深浅主题 + 品牌色变量 + 移动端优化） */
:root{
  --brand:#4f6ef7;
  --bg:#f7f8fb;
  --card:#ffffff;
  --txt:#151922;
  --muted:#6b7385;
  --line:#eaecf2;
  --soft:#f2f4f9;
  --radius:18px;
  --ring:color-mix(in srgb,var(--brand) 22%,transparent);
  --shadow-sm:0 1px 2px rgba(16,24,40,.05);
  --shadow:0 2px 8px rgba(16,24,40,.05),0 18px 40px -26px rgba(16,24,40,.35);
  --glow:radial-gradient(900px 420px at 50% -180px,color-mix(in srgb,var(--brand) 15%,transparent),transparent 70%);
}
html[data-theme="dark"]{
  --bg:#0f1117; --card:#171a22; --txt:#e7eaf2; --muted:#98a0b4;
  --line:#252a35; --soft:#1d212b;
  --ring:color-mix(in srgb,var(--brand) 30%,transparent);
  --shadow-sm:0 1px 2px rgba(0,0,0,.5);
  --shadow:0 2px 10px rgba(0,0,0,.45),0 20px 44px -28px rgba(0,0,0,.9);
  --glow:radial-gradient(900px 420px at 50% -200px,color-mix(in srgb,var(--brand) 26%,transparent),transparent 70%);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);background-image:var(--glow);background-repeat:no-repeat;background-attachment:fixed;
  color:var(--txt);min-height:100vh;display:flex;flex-direction:column;line-height:1.62;
  -webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}

/* ===== 公告条 ===== */
.announce{
  background:linear-gradient(90deg,var(--brand),color-mix(in srgb,var(--brand) 55%,#a855f7));
  color:#fff;text-align:center;padding:9px 16px;font-size:13.5px;
}
.announce a{color:#fff;text-decoration:underline}

/* ===== 顶栏 ===== */
.topbar{position:sticky;top:0;z-index:30;background:var(--bg);background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.bar-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16.5px;letter-spacing:-.01em;min-width:0}
.logo-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.logo-mark{width:30px;height:30px;flex:none;border-radius:10px;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:15px;font-weight:800;background:var(--brand);
  background:linear-gradient(135deg,var(--brand),color-mix(in srgb,var(--brand) 55%,#7c3aed));
  box-shadow:0 6px 16px -8px color-mix(in srgb,var(--brand) 80%,transparent)}
.logo-dot{width:11px;height:11px;border-radius:4px;background:var(--brand);flex:none;
  box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 20%,transparent)}
.bar-actions{display:flex;align-items:center;gap:8px}
.theme-toggle{background:var(--card);border:1px solid var(--line);width:38px;height:38px;border-radius:12px;
  cursor:pointer;font-size:15px;line-height:1;color:var(--txt);box-shadow:var(--shadow-sm);transition:transform .15s}
.theme-toggle:hover{transform:translateY(-1px)}

/* ===== 主区 ===== */
main.container{flex:1;padding-top:0;padding-bottom:56px}

/* 头部 Hero */
.hero{padding:44px 0 26px;text-align:center}
.hero h1{margin:0 0 10px;font-size:clamp(25px,4.4vw,37px);line-height:1.2;letter-spacing:-.025em;font-weight:800}
.hero-sub{margin:0 auto 24px;max-width:640px;color:var(--muted);font-size:15px}
.search{display:flex;align-items:center;gap:6px;max-width:620px;margin:0 auto;background:var(--card);
  border:1px solid var(--line);border-radius:999px;padding:6px 6px 6px 18px;box-shadow:var(--shadow-sm);
  transition:border-color .18s,box-shadow .18s}
.search:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px var(--ring)}
.search-ico{color:var(--muted);font-size:17px;line-height:1;flex:none}
.search input{flex:1;min-width:0;border:0;background:transparent;color:var(--txt);font-size:15px;
  padding:10px 6px;outline:none;font-family:inherit}
.search input::placeholder{color:var(--muted)}
.search button{flex:none;border:0;border-radius:999px;background:var(--brand);color:#fff;font-weight:600;
  font-size:14.5px;padding:0 22px;height:42px;cursor:pointer;font-family:inherit;transition:filter .15s}
.search button:hover{filter:brightness(1.07)}

/* 布局 */
.layout{display:grid;grid-template-columns:1fr 268px;gap:24px;align-items:start}

/* 分类胶囊 */
.cat-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.cat-nav a{padding:7px 15px;border-radius:999px;background:var(--card);border:1px solid var(--line);
  font-size:13.5px;color:var(--muted);box-shadow:var(--shadow-sm);transition:color .15s,border-color .15s,transform .15s}
.cat-nav a:hover{color:var(--txt);transform:translateY(-1px)}
.cat-nav a.on{background:var(--brand);color:#fff;border-color:transparent;font-weight:600;
  box-shadow:0 8px 20px -12px color-mix(in srgb,var(--brand) 90%,transparent)}
.cat-nav a em{font-style:normal;font-size:11.5px;opacity:.65;margin-left:3px}

/* 卡片网格 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(238px,1fr));gap:18px}
.item-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--shadow-sm);
  transition:transform .2s cubic-bezier(.4,0,.2,1),box-shadow .2s,border-color .2s}
.item-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line);border-color:color-mix(in srgb,var(--brand) 28%,var(--line))}
.thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--soft);
  background:linear-gradient(140deg,color-mix(in srgb,var(--brand) 14%,var(--card)),color-mix(in srgb,var(--brand) 4%,var(--soft)));
  display:flex;align-items:center;justify-content:center}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.item-card:hover .thumb img{transform:scale(1.04)}
.thumb-ph{font-size:44px;font-weight:800;color:var(--brand);opacity:.32;letter-spacing:-.04em;user-select:none}
.pin,.ext{position:absolute;top:10px;font-size:11px;padding:3px 9px;border-radius:999px;font-weight:600;line-height:1.5}
.pin{left:10px;background:#f59e0b;color:#fff;box-shadow:0 4px 12px -6px rgba(245,158,11,.9)}
.ext{right:10px;background:rgba(18,22,32,.55);color:#fff;backdrop-filter:blur(6px)}
.lock{position:absolute;bottom:10px;right:10px;font-size:12px;background:var(--card);background:color-mix(in srgb,var(--card) 88%,transparent);
  border-radius:9px;padding:3px 7px;line-height:1;box-shadow:var(--shadow-sm)}
.card-body{padding:14px 16px 16px;display:flex;flex-direction:column;flex:1}
.card-body h3{margin:0;font-size:15px;line-height:1.45;font-weight:650;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{margin:7px 0 12px;font-size:12.8px;color:var(--muted);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px;
  font-size:12px;color:var(--muted);padding-top:10px;border-top:1px dashed var(--line)}

/* 空状态 / 提示 */
.tag-notice{color:var(--muted);font-size:13px;margin:18px 2px 0;text-align:center}
.tag-notice a{color:var(--brand)}
.empty{text-align:center;padding:64px 0 40px;color:var(--muted)}
.empty-ico{width:64px;height:64px;margin:0 auto 16px;border-radius:20px;background:var(--soft);
  display:flex;align-items:center;justify-content:center;font-size:28px}
.empty p{margin:0 0 16px;font-size:15px}
.btn{display:inline-block;padding:10px 24px;border-radius:12px;background:var(--brand);color:#fff;
  font-weight:600;font-size:14px;box-shadow:0 10px 22px -14px color-mix(in srgb,var(--brand) 90%,transparent)}
.btn:hover{filter:brightness(1.06)}

/* 分页 */
.pager{display:flex;gap:7px;justify-content:center;margin-top:32px;flex-wrap:wrap}
.pg{min-width:38px;height:38px;padding:0 12px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;background:var(--card);border:1px solid var(--line);font-size:13px;color:var(--txt);
  box-shadow:var(--shadow-sm);transition:border-color .15s,color .15s}
.pg:hover{border-color:color-mix(in srgb,var(--brand) 45%,var(--line));color:var(--brand)}
.pg.cur{background:var(--brand);color:#fff;border-color:transparent;font-weight:600;
  box-shadow:0 8px 18px -12px rgba(79,110,247,.85);
  box-shadow:0 10px 22px -14px color-mix(in srgb,var(--brand) 90%,transparent)}
.pg.disabled{opacity:.4;pointer-events:none;box-shadow:none}

/* 侧栏 */
.side-col{position:sticky;top:80px;display:flex;flex-direction:column;gap:16px}
.side-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 14px;box-shadow:var(--shadow-sm)}
.side-box h4{margin:0 0 12px;font-size:13.5px;font-weight:700;letter-spacing:.01em}
.tag-cloud{display:flex;flex-wrap:wrap;gap:7px}
.tag-cloud a{padding:4px 11px;border-radius:999px;background:var(--soft);font-size:12.5px;color:var(--muted);
  transition:background .15s,color .15s}
.tag-cloud a:hover{background:var(--soft);background:color-mix(in srgb,var(--brand) 12%,var(--soft));color:var(--brand)}
.tag-cloud em{font-style:normal;font-size:10.5px;opacity:.65}
.hot-list{margin:0;padding:0;list-style:none}
.hot-list li{display:flex;align-items:center;gap:9px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:13px}
.hot-list li:last-child{border:0;padding-bottom:0}
.hot-list a{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:flex;align-items:center;gap:8px}
.hot-list a:hover{color:var(--brand)}
.hot-list em{font-style:normal;color:var(--muted);font-size:11.5px;flex:none}
.rank{width:20px;height:20px;border-radius:7px;background:var(--soft);color:var(--muted);font-size:11.5px;
  display:inline-flex;align-items:center;justify-content:center;flex:none;font-style:normal;font-weight:700}
.rank.r1{background:#ef4444;color:#fff}.rank.r2{background:#f59e0b;color:#fff}.rank.r3{background:#10b981;color:#fff}

/* ===== 密码门 / 404 ===== */
.gate-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:34px 28px;
  text-align:center;box-shadow:var(--shadow)}
.gate-card h2{margin:0 0 8px;font-size:20px;letter-spacing:-.01em}
.gate-card .muted{color:var(--muted);font-size:13.5px;margin:0 0 18px}
.gate-err{color:#dc2626;font-size:13px;margin:0 0 12px;background:#fef2f2;border-radius:10px;padding:8px 10px}
.gate-card input{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:13px;font-size:16px;
  background:var(--soft);color:var(--txt);outline:none;margin-bottom:12px;font-family:inherit}
.gate-card input:focus{border-color:var(--brand);background:var(--card);box-shadow:0 0 0 4px var(--ring)}
.gate-card button{width:100%;padding:13px;border:0;border-radius:13px;background:var(--brand);color:#fff;
  font-size:15px;font-weight:600;cursor:pointer;font-family:inherit}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--line);padding:24px 0 34px;color:var(--muted);font-size:12.5px;text-align:center}
.footer p{margin:0;line-height:1.9}
.footer a{color:var(--muted)}
.footer a:hover{color:var(--brand)}
.footer .foot-dot{margin:0 6px;opacity:.5}

/* ================= 响应式 ================= */
@media(max-width:900px){
  .layout{grid-template-columns:1fr;gap:20px}
  .side-col{position:static;order:2;display:grid;grid-template-columns:1fr 1fr;gap:14px}
  .hero{padding:32px 0 20px;text-align:left}
  .hero-sub{margin-left:0;font-size:14px}
  .search{margin:0;max-width:none}
}
@media(max-width:640px){
  .container{padding:0 14px}
  .bar-inner{height:56px}
  .hero{padding:24px 0 16px}
  .hero h1{font-size:23px;margin-bottom:6px}
  .hero-sub{font-size:13.5px;margin-bottom:16px;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .search{padding:5px 5px 5px 14px}
  .search input{font-size:15px;padding:9px 4px}
  .search button{height:38px;padding:0 16px;font-size:14px}
  .cat-nav{flex-wrap:nowrap;overflow-x:auto;margin:0 -14px 16px;padding:2px 14px 8px;
    -ms-overflow-style:none;scrollbar-width:none}
  .cat-nav::-webkit-scrollbar{display:none}
  .cat-nav a{flex:none;padding:6px 13px;font-size:13px}
  .grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .thumb{aspect-ratio:4/3}
  .thumb-ph{font-size:34px}
  .card-body{padding:10px 11px 12px}
  .card-body h3{font-size:13.5px;line-height:1.42}
  .card-body p{font-size:11.5px;margin:5px 0 9px;-webkit-line-clamp:2}
  .meta{font-size:10.5px;padding-top:8px;flex-direction:column;align-items:flex-start;gap:1px}
  .pin,.ext{font-size:10px;padding:2px 7px;top:7px}
  .pin{left:7px}.ext{right:7px}
  .side-col{grid-template-columns:1fr}
  .pager{gap:6px;margin-top:24px}
  .pg{min-width:36px;height:36px;padding:0 10px;font-size:12.5px;border-radius:11px}
  .gate-card{padding:26px 20px;border-radius:18px}
  .footer{padding:20px 0 28px;font-size:11.5px}
}
@media(max-width:360px){
  .grid{grid-template-columns:1fr}
  .card-body p{display:none}
}