/* ============================================================
   软件库导航站 - 前台样式（WebStack 原版布局 + 6 套主题）
   ============================================================ */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --font:"Inter","HarmonyOS Sans SC","Microsoft YaHei UI","PingFang SC","Segoe UI",system-ui,-apple-system,sans-serif;
}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--content-bg);
  color:var(--text);
  min-height:100vh;
  transition:background .45s ease,color .45s ease;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--accent);color:#fff}

/* ---------- 主题变量 ---------- */
/* 原版绿：复刻 cscq.vip（WebStack aero skin） */
[data-theme="webstack"]{
  --sidebar-bg:#558c89;--sidebar-text:#ececea;--sidebar-border:#5f9a97;--sidebar-active:#4f8280;
  --content-bg:#f3f4f6;--card-bg:#ffffff;--card-border:#e4ecf3;
  --text:#4c5866;--muted:#8f9bab;
  --accent:#558c89;--accent-2:#6da5a2;--accent-soft:rgba(85,140,137,.14);
  --card-shadow:0 1px 2px rgba(0,0,0,.04);
  --card-hover-shadow:0 26px 40px -24px rgba(0,36,100,.3);
  --radius:4px;
}
[data-theme="mist"]{
  --sidebar-bg:#1d2b4b;--sidebar-text:#dbe4f5;--sidebar-border:#2c3f68;--sidebar-active:#2f6bff;
  --content-bg:#f5f7fc;--card-bg:#ffffff;--card-border:#e4e9f2;
  --text:#1c2536;--muted:#64748b;
  --accent:#2f6bff;--accent-2:#0ea5e9;--accent-soft:rgba(47,107,255,.12);
  --card-shadow:0 1px 2px rgba(28,37,54,.05),0 1px 3px rgba(28,37,54,.07);
  --card-hover-shadow:0 14px 30px -10px rgba(28,37,54,.18);
  --radius:10px;
}
[data-theme="deep"]{
  --sidebar-bg:#0a0f1e;--sidebar-text:#c6d3ec;--sidebar-border:#1a2542;--sidebar-active:#22d3ee;
  --content-bg:#0d1220;--card-bg:rgba(148,163,184,.07);--card-border:rgba(148,163,184,.16);
  --text:#e6edf7;--muted:#93a3bd;
  --accent:#22d3ee;--accent-2:#818cf8;--accent-soft:rgba(34,211,238,.15);
  --card-shadow:0 1px 2px rgba(0,0,0,.35);
  --card-hover-shadow:0 14px 32px -10px rgba(34,211,238,.24);
  --radius:12px;
}
body[data-theme="deep"]{
  background:radial-gradient(1200px 560px at 50% -120px,#182742 0%,transparent 62%),linear-gradient(180deg,#0d1220,#0d1220 70%,#0b1020);
}
[data-theme="glass"]{
  --sidebar-bg:rgba(20,58,74,.88);--sidebar-text:#e7f5f2;--sidebar-border:rgba(255,255,255,.12);--sidebar-active:#0d9488;
  --content-bg:#eef3f8;--card-bg:rgba(255,255,255,.66);--card-border:rgba(255,255,255,.78);
  --text:#16324a;--muted:#5b7488;
  --accent:#0d9488;--accent-2:#6366f1;--accent-soft:rgba(13,148,136,.15);
  --card-shadow:0 8px 24px -14px rgba(22,50,74,.28);
  --card-hover-shadow:0 16px 34px -12px rgba(22,50,74,.32);
  --radius:12px;
}
body[data-theme="glass"]{
  background:linear-gradient(135deg,#ddf1ee 0%,#e9effb 46%,#fbe7f0 100%);
}
[data-theme="glass"] .card,
[data-theme="glass"] .search-box input,
[data-theme="glass"] .theme-dots{
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
[data-theme="warm"]{
  --sidebar-bg:#4a3522;--sidebar-text:#f4e9d8;--sidebar-border:#5d4630;--sidebar-active:#ea6a3a;
  --content-bg:#faf3e7;--card-bg:#fffdf8;--card-border:#eddfc9;
  --text:#3d2f21;--muted:#8a7660;
  --accent:#ea6a3a;--accent-2:#f59e0b;--accent-soft:rgba(234,106,58,.13);
  --card-shadow:0 1px 3px rgba(61,47,33,.07);
  --card-hover-shadow:0 14px 28px -10px rgba(61,47,33,.2);
  --radius:12px;
}
body[data-theme="warm"]{background:linear-gradient(180deg,#fdf6ea 0%,#faf3e7 100%)}
[data-theme="vivid"]{
  --sidebar-bg:#221844;--sidebar-text:#ece7fb;--sidebar-border:#38286b;--sidebar-active:#7c3aed;
  --content-bg:#fbfbfd;--card-bg:#ffffff;--card-border:#e8e8f0;
  --text:#232333;--muted:#6e6e85;
  --accent:#7c3aed;--accent-2:#ec4899;--accent-soft:rgba(124,58,237,.1);
  --card-shadow:0 1px 3px rgba(35,35,51,.07);
  --card-hover-shadow:0 14px 28px -10px rgba(35,35,51,.18);
  --radius:12px;
}
[data-theme="vivid"] .card-icon{background:linear-gradient(135deg,var(--sec-a,var(--accent)),var(--sec-b,var(--accent-2)))}
[data-theme="vivid"] .section-head h2::before{background:linear-gradient(var(--sec-a,var(--accent)),var(--sec-b,var(--accent-2)))}

/* ---------- 装饰层（非原版主题） ---------- */
.deco{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.deco-grid{display:none;position:absolute;inset:0;
  background-image:linear-gradient(var(--card-border) 1px,transparent 1px),linear-gradient(90deg,var(--card-border) 1px,transparent 1px);
  background-size:44px 44px;opacity:.55;
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 28%,transparent 78%);
  mask-image:radial-gradient(ellipse at 50% 0%,#000 28%,transparent 78%)}
[data-theme="mist"] .deco-grid{display:block}
#stars{display:none;position:absolute;inset:0;width:100%;height:100%}
[data-theme="deep"] #stars{display:block}
.deco-blobs{display:none;position:absolute;inset:0;filter:blur(90px)}
[data-theme="glass"] .deco-blobs{display:block}
.deco-blobs i{position:absolute;border-radius:50%;opacity:.6;animation:float 20s ease-in-out infinite}
.deco-blobs i:nth-child(1){width:430px;height:430px;background:#5eead4;top:-140px;left:-120px}
.deco-blobs i:nth-child(2){width:380px;height:380px;background:#c4b5fd;bottom:-120px;right:-100px;animation-delay:-6s}
.deco-blobs i:nth-child(3){width:300px;height:300px;background:#fbcfe8;top:32%;left:62%;animation-delay:-12s}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(26px,22px) scale(1.06)}}
.deco-rays{display:none;position:absolute;top:-170px;left:50%;transform:translateX(-50%);width:920px;height:920px;border-radius:50%;
  background:radial-gradient(circle,rgba(251,146,60,.2) 0%,transparent 62%)}
[data-theme="warm"] .deco-rays{display:block}
.deco-confetti{display:none;position:absolute;inset:0}
[data-theme="vivid"] .deco-confetti{display:block}
.deco-confetti i{position:absolute;width:12px;height:12px;border-radius:4px;opacity:.35;animation:drift 16s linear infinite}
.deco-confetti i:nth-child(1){left:8%;top:-20px;background:#7c3aed;animation-duration:17s}
.deco-confetti i:nth-child(2){left:22%;top:-20px;background:#ec4899;animation-duration:21s;animation-delay:-4s}
.deco-confetti i:nth-child(3){left:40%;top:-20px;background:#f59e0b;animation-duration:19s;animation-delay:-9s}
.deco-confetti i:nth-child(4){left:58%;top:-20px;background:#0ea5e9;animation-duration:23s;animation-delay:-2s}
.deco-confetti i:nth-child(5){left:74%;top:-20px;background:#10b981;animation-duration:18s;animation-delay:-7s}
.deco-confetti i:nth-child(6){left:90%;top:-20px;background:#f43f5e;animation-duration:22s;animation-delay:-13s}
@keyframes drift{to{transform:translateY(110vh) rotate(360deg)}}

/* ---------- 整体布局：侧边栏 + 内容 ---------- */
.page{display:flex;min-height:100vh;align-items:stretch}
.sidebar{flex:none;width:216px;background:var(--sidebar-bg);color:var(--sidebar-text);
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}
/* 顶部 logo */
.logo-env{position:relative;border-bottom:1px solid var(--sidebar-border);padding:22px 20px 20px;overflow:hidden}
.logo-env h1{font-size:26px;font-weight:800;color:#fff;letter-spacing:.02em;line-height:1.2;word-break:break-all}
.logo-env .subscript{position:absolute;right:-34px;top:16px;width:100px;text-align:center;line-height:30px;
  font-size:11px;color:#fff;background:#ff5722;transform:rotate(45deg);z-index:5;font-weight:600;letter-spacing:.12em}
.logo-env .logo-sub{font-size:12px;opacity:.75;margin-top:4px;letter-spacing:.04em}
/* 搜索 */
.search-box{position:relative;margin:14px 14px 6px}
.search-box svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:15px;height:15px;opacity:.75;pointer-events:none}
.search-box input{width:100%;padding:9px 14px 9px 36px;border-radius:6px;border:1px solid transparent;
  background:rgba(0,0,0,.18);color:#fff;font-size:13px;font-family:inherit;outline:none;transition:border-color .2s,background .2s}
.search-box input::placeholder{color:rgba(255,255,255,.6)}
.search-box input:focus{border-color:rgba(255,255,255,.4);background:rgba(0,0,0,.28)}
/* 导航 */
#nav{flex:1;padding:4px 10px 10px;display:flex;flex-direction:column;gap:1px}
.sb-item{display:flex;align-items:center;gap:9px;width:100%;padding:9px 10px;border:0;border-radius:5px;
  background:none;color:var(--sidebar-text);font-size:13.5px;text-align:left;font-family:inherit;cursor:pointer;
  border-bottom:1px solid var(--sidebar-border);transition:background .15s,color .15s}
.sb-item:hover{color:#fff;background:rgba(0,0,0,.12)}
.sb-item.active{background:var(--sidebar-active);color:#fff;border-bottom-color:transparent;font-weight:600}
.sb-item .sb-ic{flex:none;width:16px;text-align:center;opacity:.85}
.sb-item .sb-ic svg{width:14px;height:14px;vertical-align:-2px}
.sb-item .sb-n{margin-left:auto;font-size:10.5px;background:rgba(0,0,0,.2);padding:1px 7px;border-radius:999px}
.sb-item.active .sb-n{background:rgba(255,255,255,.22)}
/* 侧边栏底部：主题 + 后台 */
.side-foot{padding:10px 14px 16px;border-top:1px solid var(--sidebar-border);display:flex;flex-direction:column;gap:10px}
.theme-dots{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.theme-dot{width:15px;height:15px;border-radius:50%;cursor:pointer;border:2px solid rgba(255,255,255,.25);transition:transform .2s,border-color .2s;flex:none}
.theme-dot:hover{transform:scale(1.18)}
.theme-dot.active{border-color:#fff;box-shadow:0 0 0 2px rgba(255,255,255,.35)}
.admin-btn{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:6px;color:var(--sidebar-text);
  text-decoration:none;font-size:12.5px;border:1px solid var(--sidebar-border);transition:background .15s,color .15s}
.admin-btn:hover{background:rgba(0,0,0,.12);color:#fff}
.admin-btn svg{width:14px;height:14px}

/* ---------- 内容区 ---------- */
.content{flex:1;min-width:0;display:flex;flex-direction:column}
.page-head{padding:24px 26px 6px}
.page-head h2{font-size:22px;font-weight:800;color:var(--text);letter-spacing:.01em}
.page-head p{font-size:13px;color:var(--muted);margin-top:6px;letter-spacing:.03em}
main#sections{flex:1;padding:14px 26px 30px;min-width:0}
.site-footer{padding:18px 26px 26px;border-top:1px solid var(--card-border);color:var(--muted);font-size:12.5px;text-align:center}

/* ---------- 栏目与卡片（WebStack 风格） ---------- */
.section{margin-bottom:30px;scroll-margin-top:16px}
.section-head{display:flex;align-items:center;gap:9px;margin-bottom:4px;padding:8px 0 4px}
.section-head h2{font-size:16px;font-weight:700;color:var(--text);position:relative;padding-left:12px}
.section-head h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;background:var(--accent)}
.section-head .count{font-size:11.5px;color:var(--muted);background:var(--card-bg);border:1px solid var(--card-border);padding:2px 9px;border-radius:999px}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(252px,1fr));gap:0 16px}
.card{display:flex;gap:12px;align-items:center;height:84px;padding:0 22px;border-radius:var(--radius);
  background:var(--card-bg);border:1px solid var(--card-border);box-shadow:var(--card-shadow);text-decoration:none;color:inherit;
  margin:12px 0 0;transition:transform .3s ease,box-shadow .3s ease}
.card:hover{transform:translateY(-6px);box-shadow:var(--card-hover-shadow)}
.card-icon{flex:none;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--sec-a,var(--accent)),var(--sec-b,var(--accent-2)));color:#fff}
.card-icon svg{width:19px;height:19px}
.card-icon img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.card-body{min-width:0;flex:1}
.card-title{font-size:14px;font-weight:600;display:block;line-height:1.4;color:var(--text)}
.card-desc{font-size:12px;color:var(--muted);margin-top:3px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.empty-tip{grid-column:1/-1;text-align:center;padding:34px 10px;color:var(--muted);font-size:13px;border:1px dashed var(--card-border);border-radius:var(--radius);margin-top:12px}
.error-banner{max-width:1200px;margin:16px 26px 0;padding:13px 18px;border-radius:8px;color:#b91c1c;
  background:rgba(220,38,38,.08);border:1px solid rgba(220,38,38,.3);font-size:13.5px}

/* ---------- Toast ---------- */
#toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(16px);background:#0f172a;color:#fff;
  padding:10px 20px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;z-index:300;
  box-shadow:0 10px 24px -8px rgba(0,0,0,.45);transition:opacity .25s,transform .25s;max-width:86vw}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
#toast.err{background:#b91c1c}

/* ---------- 移动端 ---------- */
@media (max-width:820px){
  .page{flex-direction:column}
  .sidebar{position:static;width:100%;height:auto;overflow:visible}
  .logo-env{padding:14px 16px 12px;border-bottom:1px solid var(--sidebar-border)}
  .logo-env h1{font-size:20px}
  .logo-env .subscript{top:10px}
  .search-box{margin:12px 12px 4px}
  #nav{flex-direction:row;flex-wrap:wrap;gap:4px;padding:8px 10px 6px}
  .sb-item{flex:1 0 auto;justify-content:center;padding:8px 6px;font-size:12.5px;border-bottom:0;border-radius:6px}
  .sb-item .sb-ic{display:none}
  .sb-item .sb-n{display:none}
  .side-foot{flex-direction:row;align-items:center;justify-content:space-between;padding:8px 12px 12px}
  .page-head{padding:16px 14px 4px}
  main#sections{padding:8px 14px 24px}
  .card-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:0 10px}
  .card{padding:0 14px;gap:10px;height:76px}
  .card-icon{width:34px;height:34px}
  .site-footer{padding:14px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}