/* ============================================================
   问答（ask.netcn.org）— 科学魔法风 (Science Magic) 设计系统
   重构：惊喜喜 (Delightful Experience Designer)
   保留全部既有 class 名，仅升级视觉与微交互；JS 逻辑不受影响。
   ============================================================ */

/* ---------- 主题变量 ---------- */
:root{
  --bg:#e9edf6; --bg2:rgba(255,255,255,.55); --panel:rgba(255,255,255,.68);
  --border:rgba(15,23,42,.10); --border-strong:rgba(15,23,42,.18);
  --fg:#0f172a; --fg2:#475569; --fg3:#94a3b8;
  --accent:#0ea5a0; --accent2:#7c5cff; --mark:#fff3bf;
  --glass-blur:14px; --radius:16px; --radius-sm:11px;
  --shadow:0 8px 30px rgba(20,30,60,.10); --shadow-lg:0 18px 50px rgba(20,30,60,.18);
  --c:#0ea5a0; /* 当前学科主题色，由 nth-child 覆盖 */
}
html.dark{
  --bg:#070b18; --bg2:rgba(30,40,66,.5); --panel:rgba(20,28,48,.6);
  --border:rgba(255,255,255,.10); --border-strong:rgba(255,255,255,.2);
  --fg:#e8edf6; --fg2:#aab4c8; --fg3:#76839b;
  --accent:#1fd6b6; --accent2:#9b7bff; --mark:#5a4a12;
}
html.light{
  --bg:#e9edf6; --bg2:rgba(255,255,255,.55); --panel:rgba(255,255,255,.68);
  --border:rgba(15,23,42,.10); --border-strong:rgba(15,23,42,.18);
  --fg:#0f172a; --fg2:#475569; --fg3:#94a3b8;
  --accent:#0ea5a0; --accent2:#7c5cff; --mark:#fff3bf;
}

/* ---------- 基础 ---------- */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; color:var(--fg);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:15px; line-height:1.65; min-height:100%;
  background:var(--bg);
  position:relative; overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
/* 深空极光背景：两层缓慢漂移的光晕 */
body::before,body::after{
  content:""; position:fixed; z-index:-2; inset:-20% -10%;
  background:
    radial-gradient(40% 50% at 18% 22%, color-mix(in srgb,var(--accent) 38%,transparent), transparent 70%),
    radial-gradient(45% 55% at 82% 18%, color-mix(in srgb,var(--accent2) 34%,transparent), transparent 70%),
    radial-gradient(50% 60% at 60% 92%, color-mix(in srgb,var(--accent) 26%,transparent), transparent 72%);
  filter:blur(36px) saturate(125%); opacity:.55;
  animation:aurora 22s ease-in-out infinite alternate;
}
body::after{ animation-duration:28s; animation-direction:alternate-reverse; opacity:.4;
  background:
    radial-gradient(40% 50% at 78% 78%, color-mix(in srgb,var(--accent2) 30%,transparent), transparent 70%),
    radial-gradient(45% 50% at 12% 85%, color-mix(in srgb,var(--accent) 24%,transparent), transparent 72%);
}
@keyframes aurora{
  0%{transform:translate3d(-3%,-2%,0) scale(1)}
  50%{transform:translate3d(4%,3%,0) scale(1.08)}
  100%{transform:translate3d(-2%,2%,0) scale(1.02)}
}
html.dark body::before,html.dark body::after{opacity:.7}
html.light body::before,html.light body::after{opacity:.5}

a{color:var(--accent);text-decoration:none;transition:color .15s}
a:hover{color:var(--accent2)}

/* ---------- 顶栏：由 netcn 壳层 netcn-shell.css 统一（.nc-shell / .nc-search / .nc-tools） ---------- */
.suggest{
  position:absolute; top:calc(100% + 6px); left:0; right:0; z-index:30;
  background:color-mix(in srgb,var(--panel) 92%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow-lg);
  max-height:320px; overflow:auto; padding:6px;
  animation:pop .18s ease;
}
@keyframes pop{from{opacity:0;transform:translateY(-6px) scale(.99)}to{opacity:1;transform:none}}
.suggest div{padding:9px 12px; border-radius:var(--radius-sm); cursor:pointer; color:var(--fg); transition:background .12s}
.suggest div:hover,.suggest div.active{background:var(--bg2)}
.suggest .sughead{padding:6px 12px; font-size:12px; color:var(--fg3); cursor:default}
.btn{
  padding:8px 14px; border:1px solid var(--border); border-radius:999px;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg);
  cursor:pointer; font-size:14px; font-weight:600; transition:all .18s; white-space:nowrap;
}
.btn:hover{border-color:var(--accent); color:var(--accent); transform:translateY(-1px)}
.btn:active{transform:translateY(0) scale(.97)}

/* ---------- 主体容器 ---------- */
main{max-width:1000px; margin:0 auto; padding:22px 16px 70px}

/* ---------- Hero（首页魔法横幅） ---------- */
.hero{
  position:relative; margin:6px 0 26px; padding:30px 28px; border-radius:22px; overflow:hidden;
  background:
    linear-gradient(135deg, color-mix(in srgb,var(--accent) 22%,transparent), color-mix(in srgb,var(--accent2) 22%,transparent));
  border:1px solid var(--border-strong);
  box-shadow:var(--shadow);
}
.hero::after{ /* 漂浮的光点 */
  content:""; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(3px 3px at 12% 30%, #fff8, transparent),
    radial-gradient(2px 2px at 70% 22%, #fff7, transparent),
    radial-gradient(2.5px 2.5px at 85% 70%, #fff6, transparent),
    radial-gradient(2px 2px at 40% 80%, #fff5, transparent);
  animation:twinkle 5s ease-in-out infinite alternate;
}
@keyframes twinkle{from{opacity:.4}to{opacity:1}}
.hero h1{margin:0 0 6px; font-size:30px; line-height:1.2; font-weight:800; letter-spacing:.2px}
.hero h1 .grad{background:linear-gradient(120deg,var(--accent),var(--accent2),var(--accent)); background-size:200% auto;
  -webkit-background-clip:text; background-clip:text; color:transparent; animation:gradShift 5s linear infinite}
@keyframes gradShift{to{background-position:200% center}}
.hero > *{position:relative; z-index:1}
.hero-fx{position:absolute; pointer-events:none; opacity:.4; filter:drop-shadow(0 4px 10px rgba(0,0,0,.18)); animation:drift 9s ease-in-out infinite}
.hero-fx.hfx1{left:5%; top:16%; font-size:30px; animation-delay:0s}
.hero-fx.hfx2{right:7%; top:22%; font-size:40px; animation-delay:1.6s}
.hero-fx.hfx3{left:13%; bottom:12%; font-size:26px; animation-delay:3.2s}
.hero-fx.hfx4{right:15%; bottom:16%; font-size:32px; animation-delay:4.6s}
@keyframes drift{0%,100%{transform:translateY(0) rotate(-5deg); opacity:.3}50%{transform:translateY(-12px) rotate(7deg); opacity:.6}}
.hero p{margin:0; color:var(--fg2); font-size:15px; max-width:62ch}
.hero .stats{display:flex; flex-wrap:wrap; gap:10px 22px; margin-top:16px}
.hero .stat{display:flex; flex-direction:column}
.hero .stat b{font-size:22px; font-weight:800; line-height:1.1;
  background:linear-gradient(120deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; background-clip:text; color:transparent}
.hero .stat span{font-size:12px; color:var(--fg3)}

/* ---------- 筛选 ---------- */
.filters{margin:6px 0 20px}
.filterbar{display:flex; flex-wrap:wrap; gap:12px 20px; align-items:flex-start}
.fgroup{display:flex; flex-wrap:wrap; align-items:center; gap:7px}
.flabel{font-size:12px; color:var(--fg3); margin-right:2px; font-weight:600}
.chip{
  padding:6px 13px; border:1px solid var(--border); border-radius:999px;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg2);
  cursor:pointer; font-size:13px; line-height:1.2; transition:all .15s;
}
.chip:hover{border-color:var(--accent); color:var(--accent); transform:translateY(-1px)}
.chip.active{background:linear-gradient(120deg,var(--accent),var(--accent2));
  border-color:transparent; color:#fff; box-shadow:0 6px 16px color-mix(in srgb,var(--accent) 35%,transparent)}

/* ---------- 学科卡片网格 ---------- */
.cats{display:grid; grid-template-columns:repeat(auto-fill,minmax(160px,1fr)); gap:12px; margin-bottom:26px}
.cats-title{font-size:14px; color:var(--fg3); font-weight:600; margin:0 0 12px; letter-spacing:.4px}
.cat{
  --c:var(--accent);
  position:relative; display:block; padding:16px 16px 14px; overflow:hidden;
  background:color-mix(in srgb,var(--panel) 85%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.cat::before{ /* 顶部主题色条 */
  content:""; position:absolute; left:0; top:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--c),color-mix(in srgb,var(--c) 30%,#fff));
  opacity:.9;
}
.cat::after{ /* 悬浮微光扫过 */
  content:""; position:absolute; top:0; left:-60%; width:50%; height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);
  transform:skewX(-18deg); transition:left .55s ease; pointer-events:none;
}
.cat b{display:block; font-size:16px; color:var(--fg); font-weight:700; transition:color .2s}
.cat span{font-size:12px; color:var(--fg3)}
.cat:hover{transform:translateY(-4px); border-color:var(--c);
  box-shadow:0 16px 38px color-mix(in srgb,var(--c) 30%,transparent)}
.cat:hover::after{left:120%}
.cat:hover b{color:var(--c)}
.cat.active{border-color:var(--c); background:color-mix(in srgb,var(--c) 12%,var(--panel))}
/* 12 学科主题色 */
.cat:nth-child(1){--c:#5B8DEF}
.cat:nth-child(2){--c:#14b8a6}
.cat:nth-child(3){--c:#34d399}
.cat:nth-child(4){--c:#a78bfa}
.cat:nth-child(5){--c:#f59e0b}
.cat:nth-child(6){--c:#f472b6}
.cat:nth-child(7){--c:#fb7185}
.cat:nth-child(8){--c:#60a5fa}
.cat:nth-child(9){--c:#22d3ee}
.cat:nth-child(10){--c:#4ade80}
.cat:nth-child(11){--c:#c084fc}
.cat:nth-child(12){--c:#fb923c}

/* ---------- 结果列表 ---------- */
.results h2{font-size:15px; color:var(--fg2); margin:8px 0 14px; font-weight:500}
.reshead{font-size:15px; color:var(--fg2); margin:4px 0 12px; font-weight:600}
.reshead b{color:var(--accent)}
.qitem{
  position:relative; padding:14px 16px; margin-bottom:10px; cursor:pointer; overflow:hidden;
  background:color-mix(in srgb,var(--panel) 85%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow);
  transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.qitem::before{content:""; position:absolute; left:0; top:0; bottom:0; width:3px;
  background:linear-gradient(var(--accent),var(--accent2)); opacity:0; transition:opacity .16s}
.qitem:hover{transform:translateY(-2px); border-color:var(--accent);
  box-shadow:var(--shadow-lg)}
.qitem:hover::before{opacity:1}
.qitem .q{font-size:16px; color:var(--fg); margin:0 0 5px; font-weight:600}
.qitem .q .en{color:var(--fg2); font-weight:400; font-size:13px; margin-left:6px}
.qitem .meta{font-size:12px; color:var(--fg3)}
.qitem .s{font-size:13px; color:var(--fg2); margin-top:3px}
.tag{display:inline-block; font-size:11px; color:var(--fg2); border:1px solid var(--border);
  border-radius:999px; padding:1px 9px; margin:4px 5px 0 0;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); transition:all .15s}
.tag:hover{border-color:var(--accent); color:var(--accent)}
mark{background:var(--mark); color:inherit; padding:0 2px; border-radius:4px; font-weight:700}

/* ---------- 详情面板 ---------- */
.detail{
  background:color-mix(in srgb,var(--panel) 88%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--border); border-radius:20px; padding:24px; box-shadow:var(--shadow-lg);
  animation:pop .2s ease;
}
.detail h1{font-size:23px; margin:0 0 4px; line-height:1.3; font-weight:800}
.detail .en{color:var(--fg2); font-weight:500; font-size:16px}
.detail .meta{font-size:13px; color:var(--fg3); margin-bottom:14px; display:flex; flex-wrap:wrap; gap:6px}
.detail .meta .pill{padding:2px 10px; border:1px solid var(--border); border-radius:999px;
  background:color-mix(in srgb,var(--bg2) 70%,transparent)}
.detail .body{font-size:15.5px; line-height:1.85}
.detail .open{color:var(--fg2); font-style:italic; background:var(--bg2); padding:12px 14px;
  border-radius:var(--radius-sm); border-left:3px solid var(--accent2)}
.detail .back{display:inline-block; margin-bottom:14px; font-size:14px; font-weight:600}
.detail .back::before{content:"← "; }
.ans{border-left:3px solid var(--accent); padding:8px 0 8px 14px; margin:12px 0;
  background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 8%,transparent),transparent);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.ans .who{font-size:12px; color:var(--fg3); margin-top:4px}
.srcbox{margin-top:14px; padding:10px 14px; border-left:3px solid var(--accent2);
  background:color-mix(in srgb,var(--bg2) 60%,transparent); border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:13px; color:var(--fg3); line-height:1.7}
.srcbox .srclabel{display:inline-block; font-weight:700; color:var(--accent2); margin-right:8px}

/* ---------- 空态 / 错误态（惊喜） ---------- */
.progress{font-size:13px; color:var(--fg3); padding:8px 2px; display:flex; align-items:center; gap:8px}
.progress::before{content:""; width:14px; height:14px; border-radius:50%;
  border:2px solid color-mix(in srgb,var(--accent) 40%,transparent); border-top-color:var(--accent);
  animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.empty{padding:40px 20px; text-align:center; color:var(--fg2)}
.empty .emoji{font-size:46px; display:block; margin-bottom:8px; animation:bob 2.4s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.empty .tip{color:var(--fg3); font-size:13px; margin-top:6px}
.err{color:#ef4444; padding:30px 20px; text-align:center}
.err .emoji{font-size:40px; display:block; margin-bottom:8px}

/* ---------- 进度条（流光） ---------- */
.progressbar{position:fixed; top:0; left:0; height:3px; width:0; z-index:50;
  background:linear-gradient(90deg,var(--accent),var(--accent2),var(--accent),var(--accent2));
  background-size:300% 100%; animation:flow 1.2s linear infinite;
  transition:width .25s ease, opacity .25s ease}
@keyframes flow{to{background-position:300% 0}}

/* ---------- 骨架屏（加载中） ---------- */
.skeleton{position:relative; overflow:hidden; background:color-mix(in srgb,var(--bg2) 70%,transparent);
  border-radius:var(--radius-sm)}
.skeleton::after{content:""; position:absolute; inset:0;
  background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--fg) 8%,transparent),transparent);
  animation:shimmer 1.3s infinite}
@keyframes shimmer{to{transform:translateX(100%)}}

/* ---------- 重试 ---------- */
.retry{display:block; margin:26px auto; padding:11px 22px; border:1px solid var(--accent);
  border-radius:999px; background:color-mix(in srgb,var(--bg2) 70%,transparent);
  color:var(--accent); cursor:pointer; font-size:14px; font-weight:600; transition:all .18s}
.retry:hover{background:var(--accent); color:#fff; transform:translateY(-1px)}

/* ---------- 页脚：由 netcn 壳层 .nc-foot 统一 ---------- */
.navlink{font-size:13px; color:var(--accent)}

/* ---------- 分类页 (cat/*.html) ---------- */
header nav.cats, .catnav{display:flex; flex-wrap:wrap; gap:8px; padding:12px 16px;
  background:color-mix(in srgb,var(--panel) 80%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border-bottom:1px solid var(--border); position:sticky; top:0; z-index:20}
.cats a, .catnav a{padding:6px 12px; border-radius:999px; border:1px solid var(--border);
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg2); font-size:13px; transition:all .15s}
.cats a:hover, .catnav a:hover{color:var(--accent); border-color:var(--accent); text-decoration:none; transform:translateY(-1px)}

/* 分类页专属头图（cat-hero） */
.cat-hero{
  position:relative; margin:18px 0 26px; padding:26px 26px; border-radius:22px; overflow:hidden;
  display:flex; align-items:center; gap:22px;
  border:1px solid color-mix(in srgb,var(--c) 35%,var(--border-strong));
  background:
    radial-gradient(120% 140% at 100% 0%, color-mix(in srgb,var(--c) 30%,transparent), transparent 60%),
    linear-gradient(120deg, color-mix(in srgb,var(--c) 20%,transparent), color-mix(in srgb,var(--c) 6%,transparent));
  box-shadow:var(--shadow);
}
.cat-hero::before{ /* 柔光晕 */
  content:""; position:absolute; right:-40px; top:-50px; width:230px; height:230px; border-radius:50%;
  background:radial-gradient(circle, color-mix(in srgb,var(--c) 42%,transparent), transparent 70%);
  filter:blur(8px); opacity:.7; pointer-events:none;
}
.cat-hero::after{ /* 漂浮光点 */
  content:""; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(3px 3px at 12% 30%, #fff8, transparent),
    radial-gradient(2px 2px at 68% 22%, #fff7, transparent),
    radial-gradient(2.5px 2.5px at 90% 70%, #fff6, transparent),
    radial-gradient(2px 2px at 40% 84%, #fff5, transparent);
  animation:twinkle 5s ease-in-out infinite alternate;
}
.cat-hero-icon{
  font-size:56px; line-height:1; z-index:1; flex:0 0 auto;
  filter:drop-shadow(0 8px 18px color-mix(in srgb,var(--c) 50%,transparent));
  animation:bob 3.4s ease-in-out infinite;
}
html.dark .cat-hero-icon{filter:drop-shadow(0 8px 20px color-mix(in srgb,var(--c) 72%,transparent))}
.cat-hero-text{position:relative; z-index:1; min-width:0}
.cat-hero h1{margin:0 0 6px; font-size:30px; font-weight:800; line-height:1.2; letter-spacing:.2px}
.cat-hero h1 .en{color:var(--fg2); font-weight:500; font-size:18px; margin-left:6px}
.cat-hero .desc{margin:0; color:var(--fg2); font-size:15px; max-width:60ch}
.cat-hero .count{margin:10px 0 0; font-size:14px; color:var(--fg2)}
.cat-play{display:inline-block; margin-top:14px; padding:9px 18px; border-radius:999px; font-weight:700; font-size:14px;
  background:linear-gradient(120deg,var(--c,#0ea5a0),color-mix(in srgb,var(--c,#0ea5a0) 55%,#fff)); color:#fff; text-decoration:none;
  box-shadow:0 8px 20px color-mix(in srgb,var(--c,#0ea5a0) 35%,transparent); transition:transform .16s, box-shadow .16s}
.cat-play:hover{transform:translateY(-2px); text-decoration:none; box-shadow:0 12px 26px color-mix(in srgb,var(--c,#0ea5a0) 45%,transparent)}
.cat-hero .count b{font-size:19px; font-weight:800;
  background:linear-gradient(120deg,var(--c),var(--accent2));
  -webkit-background-clip:text; background-clip:text; color:transparent}

.qlist{list-style:none; margin:0; padding:0; display:grid; gap:10px}
.qlist li{padding:14px 16px; background:color-mix(in srgb,var(--panel) 85%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow);
  display:flex; justify-content:space-between; align-items:center; gap:12px; transition:all .16s}
.qlist li:hover{border-color:var(--accent); transform:translateY(-2px); box-shadow:var(--shadow-lg)}
.qlist a{color:var(--fg); font-weight:600; font-size:15px}
.qlist a:hover{color:var(--accent); text-decoration:none}
.qlist .meta{color:var(--fg3); font-size:12px; white-space:nowrap}

/* ---------- 404（惊喜） ---------- */
body.center{display:flex; align-items:center; justify-content:center; min-height:100vh; text-align:center}
body.center main{padding:40px}
body.center h1{font-size:96px; margin:0; font-weight:900; letter-spacing:-2px;
  background:linear-gradient(120deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
  animation:bob 3s ease-in-out infinite}
body.center p{color:var(--fg2); font-size:16px; margin:8px 0}
body.center .emoji{font-size:54px; display:block; margin-bottom:6px}
body.center a{padding:10px 20px; border-radius:999px; background:linear-gradient(120deg,var(--accent),var(--accent2));
  color:#fff; font-weight:700; display:inline-block; margin-top:14px; transition:transform .18s, box-shadow .18s;
  box-shadow:0 8px 22px color-mix(in srgb,var(--accent) 35%,transparent)}

/* ---------- 游戏化 HUD（顶栏常驻状态条，不是游戏中心入口） ---------- */
.hud{display:flex; align-items:center; gap:10px; padding:5px 12px; flex:0 0 auto;  background:color-mix(in srgb,var(--panel) 82%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--border); border-radius:999px; font-size:12px; color:var(--fg2)}
.hud[hidden]{display:none}
.hud-ring{flex:0 0 auto; min-width:30px; height:30px; padding:0 8px; border-radius:999px; display:flex; align-items:center; gap:5px; line-height:1;
  background:linear-gradient(135deg,var(--accent),var(--accent2)); color:#fff; box-shadow:0 2px 8px color-mix(in srgb,var(--accent) 40%,transparent)}
.hud-ring b{font-size:14px; font-weight:800}
.hud-ring span{font-size:9px; opacity:.92; font-weight:600}
.hud-xp{width:60px; height:6px; border-radius:999px; background:color-mix(in srgb,var(--bg2) 80%,transparent); overflow:hidden}
.hud-xp-bar{height:100%; border-radius:999px; background:linear-gradient(90deg,var(--accent),var(--accent2)); transition:width .3s ease}
.hud-stat{white-space:nowrap; font-weight:600; color:var(--fg)}

/* ---------- 首页 Hero 主 CTA（游戏第一入口） ---------- */
.cta-row{display:flex; flex-wrap:wrap; gap:12px; margin-top:18px}
.cta{padding:12px 22px; border-radius:999px; border:1px solid var(--border); cursor:pointer; font-size:15px; font-weight:700;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg); transition:transform .16s, box-shadow .16s, border-color .16s}
.cta:hover{transform:translateY(-2px); border-color:var(--accent); color:var(--accent); box-shadow:var(--shadow)}
.cta-primary{padding:14px 28px; border:none; color:#fff;
  background:linear-gradient(120deg,var(--accent),var(--accent2)); box-shadow:0 10px 26px color-mix(in srgb,var(--accent) 38%,transparent)}
.cta-primary:hover{color:#fff; box-shadow:0 14px 32px color-mix(in srgb,var(--accent) 50%,transparent)}

/* ---------- 首页启动台（游戏长进网站，无独立游戏中心） ---------- */
.launch{max-width:1040px; margin:0 auto; padding:8px 18px 40px}
.galaxy-wrap,.modes-wrap,.trail-wrap{margin-top:26px}
.galaxy-head,.modes-head,.trail-head{display:flex; align-items:baseline; gap:12px; flex-wrap:wrap; margin-bottom:14px}
.galaxy-head h2,.modes-head h2,.trail-head h2{margin:0; font-size:20px; font-weight:800}
.galaxy-sub,.modes-sub,.trail-sub{font-size:13px; color:var(--fg3)}
.galaxy{display:flex; flex-wrap:wrap; gap:16px; justify-content:flex-start}
.planet{position:relative; width:96px; height:96px; border-radius:50%; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px;
  text-decoration:none; color:var(--fg);
  background:color-mix(in srgb,var(--bg2) 82%,transparent); border:1px solid var(--border); overflow:hidden; transition:transform .18s, box-shadow .18s}
.planet::before{content:""; position:absolute; inset:0; border-radius:50%; background:conic-gradient(var(--c) calc(var(--p)*1%), transparent 0); opacity:.26}
.planet b{position:relative; font-size:15px; font-weight:800}
.planet i{position:relative; font-size:11px; color:var(--fg3); font-style:normal}
.planet:hover{transform:translateY(-3px); box-shadow:0 10px 24px color-mix(in srgb,var(--c) 35%,transparent)}
.planet.done{border-color:var(--c); box-shadow:0 0 0 2px color-mix(in srgb,var(--c) 30%,transparent), 0 8px 20px color-mix(in srgb,var(--c) 22%,transparent)}
.planet.done::before{opacity:.5}
.modes{display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:12px}
.mode-card{padding:16px 14px; border-radius:var(--radius); border:1px solid var(--border); cursor:pointer; text-align:left;
  background:color-mix(in srgb,var(--panel) 82%,transparent); color:var(--fg); transition:transform .16s, box-shadow .16s, border-color .16s}
.mode-card:hover{transform:translateY(-3px); border-color:var(--accent); color:var(--accent); box-shadow:var(--shadow)}
.mc-ic{font-size:24px; display:block; margin-bottom:6px}
.mode-card b{display:block; font-size:15px; font-weight:800; margin-bottom:2px}
.mc-d{font-size:12px; color:var(--fg3)}
.trail{display:flex; flex-wrap:wrap; gap:10px}
.trail-dot{max-width:220px; padding:9px 12px; border-radius:12px; border:1px solid var(--border); cursor:pointer; text-align:left;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg); transition:transform .15s, border-color .15s}
.trail-dot:hover{transform:translateY(-2px); border-color:var(--accent)}
.td-q{display:block; font-size:13px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.td-c{font-size:11px}
.adv{margin-top:30px; padding:12px 14px; border:1px dashed var(--border); border-radius:var(--radius)}
.adv summary{cursor:pointer; font-size:13px; color:var(--fg3); font-weight:600}
.adv[open]{padding-bottom:16px}
.back-launch{margin-bottom:14px; padding:8px 16px; border-radius:999px; border:1px solid var(--border); cursor:pointer;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg); font-size:13px; font-weight:600}
.back-launch:hover{border-color:var(--accent); color:var(--accent)}
.play-area{max-width:680px; margin:0 auto}
.play-area .g-card{padding:18px; border-radius:var(--radius); border:1px solid var(--border);
  background:color-mix(in srgb,var(--panel) 82%,transparent); box-shadow:var(--shadow)}

/* ---------- 详情页内联游戏模式（测测我 / 猜猜看） ---------- */
.flip{max-width:680px; margin:8px 0 0}
.flip-q{font-size:18px; font-weight:700; margin-bottom:12px; line-height:1.5}
.flip-a{margin:10px 0; padding:12px 14px; border-radius:var(--radius-sm); border-left:3px solid var(--accent);
  background:color-mix(in srgb,var(--accent) 8%,transparent); font-size:15px; line-height:1.7}
.flip-a-show{margin:10px 0 14px; padding:14px; border-radius:var(--radius-sm); border:1px dashed var(--accent2);
  background:color-mix(in srgb,var(--accent2) 8%,transparent); font-size:15px; line-height:1.7}
.flip-act{display:flex; flex-wrap:wrap; gap:8px; margin-top:8px}
.flip-act button{padding:9px 16px; border-radius:999px; border:1px solid var(--border); cursor:pointer;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg); font-size:13px; font-weight:600; transition:all .15s}
.flip-act button:hover{border-color:var(--accent); color:var(--accent)}

/* ---------- 玩法卡片通用 ---------- */
.g-card{padding:6px 2px}
.g-tag{font-size:12px; color:var(--fg3); font-weight:600; margin-bottom:8px}
.g-q{font-size:19px; font-weight:700; margin:0 0 12px; line-height:1.4}
.g-ans{margin:10px 0; padding:12px 14px; border-radius:var(--radius-sm); border-left:3px solid var(--accent);
  background:color-mix(in srgb,var(--accent) 8%,transparent); font-size:15px; line-height:1.7}
.g-ans-show{margin:10px 0 14px; padding:14px; border-radius:var(--radius-sm); border:1px dashed var(--accent2);
  background:color-mix(in srgb,var(--accent2) 8%,transparent); font-size:15px; line-height:1.7}
.g-opts{display:grid; gap:8px; margin:10px 0}
.g-opt{padding:11px 14px; border-radius:var(--radius-sm); border:1px solid var(--border); background:color-mix(in srgb,var(--bg2) 70%,transparent);
  color:var(--fg); font-size:14px; text-align:left; cursor:pointer; transition:all .15s}
.g-opt:hover{border-color:var(--accent); color:var(--accent); transform:translateX(2px)}
.g-actions{display:flex; flex-wrap:wrap; gap:8px; margin-top:8px}
.g-actions button,.g-card > .g-back{padding:9px 14px; border-radius:999px; border:1px solid var(--border);
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg); font-size:13px; font-weight:600; cursor:pointer; transition:all .15s}
.g-actions button:hover,.g-back:hover{border-color:var(--accent); color:var(--accent); transform:translateY(-1px)}
.g-fb{margin:12px 0 4px; font-size:14px; font-weight:600}
.g-fb .ok{color:#16a34a} html.dark .g-fb .ok{color:#4ade80}
.g-fb .bad{color:#ef4444}
.g-back{margin-top:14px}

/* 每日挑战 */
.g-daily{display:grid; gap:10px; margin:10px 0}
.g-ditem{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:10px 14px; border-radius:var(--radius-sm);
  background:color-mix(in srgb,var(--bg2) 70%,transparent); border:1px solid var(--border)}
.g-ditem b{font-size:14px; font-weight:600}
.g-ditem .g-view{padding:6px 12px; border-radius:999px; border:1px solid var(--accent); color:var(--accent); background:transparent; cursor:pointer; font-size:12px; font-weight:600}

/* 星球探险 */
.g-galaxy{display:grid; grid-template-columns:repeat(auto-fill,minmax(86px,1fr)); gap:12px; margin:12px 0}
.g-planet{position:relative; aspect-ratio:1; border-radius:50%; border:1px solid var(--border); cursor:pointer; overflow:hidden;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px;
  background:color-mix(in srgb,var(--bg2) 70%,transparent); transition:transform .18s, box-shadow .18s}
.g-planet:hover{transform:translateY(-3px); box-shadow:0 10px 24px color-mix(in srgb,var(--c) 35%,transparent)}
.g-planet b{font-size:13px; color:var(--fg); font-weight:700; z-index:1}
.g-planet i{font-size:10px; color:var(--fg3); z-index:1; font-style:normal}
.g-ring{position:absolute; inset:0; border-radius:50%;
  background:conic-gradient(var(--c) calc(var(--p)*1%), color-mix(in srgb,var(--c) 14%,transparent) 0)}
.g-planet.done{box-shadow:0 0 0 2px color-mix(in srgb,var(--c) 60%,transparent), 0 8px 20px color-mix(in srgb,var(--c) 35%,transparent)}

/* 分类挑战 / 连线 */
.g-subs{display:flex; flex-wrap:wrap; gap:8px; margin:12px 0}
.g-sub,.g-sub2{padding:9px 13px; border-radius:999px; border:1px solid var(--border); background:color-mix(in srgb,var(--bg2) 70%,transparent);
  color:var(--fg); font-size:13px; font-weight:600; cursor:pointer; transition:all .15s}
.g-sub:hover,.g-sub2:hover{border-color:var(--accent); color:var(--accent)}
.g-qlist{display:grid; gap:8px; margin:10px 0}
.g-q2{padding:11px 14px; border-radius:var(--radius-sm); border:1px solid var(--border); background:color-mix(in srgb,var(--bg2) 70%,transparent);
  color:var(--fg); font-size:14px; text-align:left; cursor:pointer; transition:all .15s}
.g-q2.sel{border-color:var(--accent2); box-shadow:0 0 0 2px color-mix(in srgb,var(--accent2) 40%,transparent)}
.g-q2.done{opacity:.5; border-color:var(--accent); background:color-mix(in srgb,var(--accent) 14%,var(--panel))}
.g-sub2.done{opacity:.4; pointer-events:none}

/* 详情页游戏按钮 */
.game-actions{display:flex; flex-wrap:wrap; gap:8px; margin:12px 0}
.game-actions button{padding:8px 14px; border-radius:999px; border:1px solid var(--border); background:color-mix(in srgb,var(--bg2) 70%,transparent);
  color:var(--fg); font-size:13px; font-weight:600; cursor:pointer; transition:all .15s}
.game-actions button:hover{border-color:var(--accent); color:var(--accent); transform:translateY(-1px)}
.game-actions button.on{border-color:var(--accent); background:color-mix(in srgb,var(--accent) 16%,var(--panel)); color:var(--accent)}
body.center a:hover{transform:translateY(-2px); box-shadow:0 12px 30px color-mix(in srgb,var(--accent) 45%,transparent); text-decoration:none}

/* ---------- 惊喜彩蛋 / 庆祝 ---------- */
.confetti{position:fixed; top:-10px; width:9px; height:14px; z-index:80; pointer-events:none;
  border-radius:2px; animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg); opacity:.2}}
.rainbow{animation:rainbow 6s linear infinite !important}
@keyframes rainbow{0%{filter:hue-rotate(0)}100%{filter:hue-rotate(360deg)}}
.toast{position:fixed; left:50%; bottom:28px; transform:translateX(-50%) translateY(20px);
  background:color-mix(in srgb,var(--panel) 95%,transparent);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--border-strong); border-radius:999px; padding:10px 20px; font-size:14px;
  color:var(--fg); box-shadow:var(--shadow-lg); opacity:0; transition:all .3s ease; z-index:90}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0)}
.spark{position:fixed; pointer-events:none; z-index:85; font-size:18px; animation:sparkUp .9s ease-out forwards}
@keyframes sparkUp{from{opacity:1; transform:translateY(0) scale(1)}to{opacity:0; transform:translateY(-40px) scale(1.6)}}

/* ---------- 响应式 ---------- */
@media (max-width:560px){
  .brand{font-size:16px}
  .hero{padding:22px 18px}
  .hero h1{font-size:24px}
  .cat{grid-column:span 1}
  .filterbar{gap:10px} .flabel{width:100%}
  body.center h1{font-size:72px}
  .cat-hero{flex-direction:column; text-align:center; align-items:center; padding:24px 18px; gap:14px}
  .cat-hero h1{font-size:24px}
  .cat-hero .count{font-size:13px}
  .hud{order:2; margin-left:auto}
  .launch{padding:8px 12px 32px}
  .planet{width:80px; height:80px}
  .galaxy{gap:12px}
  .cta-row{justify-content:center}
}

/* ---------- 尊重「减少动态效果」偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important; animation-iteration-count:1 !important;
    transition-duration:.001ms !important; scroll-behavior:auto !important}
  body::before,body::after{animation:none}
}

/* ================= 首页科学嘉年华（五花八门，无整齐分区） ================= */
/* ================= 首页科学嘉年华（五花八门 · 有秩序的网格） ================= */
.carnival{display:grid; grid-template-columns:repeat(12,1fr); gap:16px; max-width:1100px; margin:0 auto; padding:14px 4px 40px}
/* 顶部：换一批新鲜事，制造「层出不穷」 */
.cw-top{grid-column:span 12; display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; margin-bottom:-2px}
.cw-top .lead{font-size:13px; color:var(--fg3)}
.cw-shuffle{display:inline-flex; align-items:center; gap:6px; padding:8px 16px; border-radius:999px; border:1px solid var(--border);
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--fg); font-size:13px; font-weight:700; cursor:pointer; transition:all .16s}
.cw-shuffle:hover{border-color:var(--accent); color:var(--accent); transform:translateY(-1px)}
.cw-shuffle:active{transform:scale(.96) rotate(-4deg)}
.cw{grid-column:span 12}
.cw-card{position:relative; overflow:hidden; border-radius:20px; padding:16px 17px; min-height:124px;
  background:linear-gradient(160deg, color-mix(in srgb,var(--panel) 92%,transparent), color-mix(in srgb,var(--panel) 72%,transparent));
  border:1px solid var(--border); box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(var(--glass-blur)); backdrop-filter:blur(var(--glass-blur));
  opacity:0; transform:translateY(16px); animation:cardIn .55s cubic-bezier(.2,.7,.3,1) forwards; animation-delay:calc(var(--i,0)*55ms);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease}
.cw-card::before{content:""; position:absolute; left:0; top:0; right:0; height:3px; opacity:0; transition:opacity .2s;
  background:linear-gradient(90deg,var(--accent),var(--accent2))}
.cw-card::after{content:""; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(120% 80% at 88% 0%, color-mix(in srgb,var(--accent) 8%,transparent), transparent 55%)}
.cw-card:hover{transform:translateY(-4px); box-shadow:var(--shadow-lg); border-color:var(--border-strong)}
.cw-card:hover::before{opacity:.9}
@keyframes cardIn{to{opacity:1; transform:none}}
.cw-h{font-size:16px; font-weight:800; margin:0 0 3px; position:relative; display:flex; align-items:center; gap:6px}
.cw-sub{font-size:12px; color:var(--fg3); margin:0 0 10px; position:relative}
.cw-btn{margin-top:10px; padding:9px 18px; border-radius:999px; border:1px solid transparent; cursor:pointer;
  background:linear-gradient(120deg,var(--accent),var(--accent2)); color:#fff; font-weight:700; font-size:13px; transition:transform .15s, box-shadow .15s;
  box-shadow:0 6px 16px color-mix(in srgb,var(--accent) 30%,transparent)}
.cw-btn:hover{transform:translateY(-2px); box-shadow:0 10px 22px color-mix(in srgb,var(--accent) 42%,transparent)}
.cw-btn:active{transform:translateY(0) scale(.97)}
.tilt-a{transform:rotate(-1.4deg)} .tilt-b{transform:rotate(1.4deg)}
.cw-gacha{grid-column:span 4} .cw-wheel{grid-column:span 4} .cw-8ball{grid-column:span 4}
.cw-die{grid-column:span 3} .cw-well{grid-column:span 3} .cw-scratch{grid-column:span 6}
.cw-galaxy{grid-column:span 6} .cw-modes{grid-column:span 6}
.cw-ticker,.cw-bubbles,.cw-trail,.cw-adv{grid-column:span 12}
@keyframes pop{0%{transform:scale(1)}55%{transform:scale(1.55)}100%{transform:scale(2); opacity:0}}

/* 🎰 扭蛋机 */
.gacha{display:flex; align-items:flex-end; justify-content:center; gap:10px; min-height:84px}
.gacha-m{font-size:42px; cursor:pointer; transition:transform .2s; filter:drop-shadow(0 6px 10px rgba(0,0,0,.35))}
.gacha-m.shake{animation:shake .4s}
.capsule{width:34px; height:34px; border-radius:50%; background:radial-gradient(circle at 30% 30%, #fff, #fb7185); opacity:0; box-shadow:inset 0 0 6px rgba(0,0,0,.2)}
.capsule.drop{animation:capDrop .6s forwards}
.capsule.open{animation:capOpen .4s forwards}
.cap-card{margin-top:10px; text-align:center}
.cap-card b{display:block; font-size:13px; margin:4px 0; line-height:1.4}
@keyframes capDrop{0%{transform:translateY(-46px) rotate(0); opacity:1}100%{transform:translateY(0) rotate(360deg); opacity:1}}
@keyframes capOpen{to{transform:scale(1.5); opacity:0}}

/* 🎡 幸运转盘 */
.wheel-wrap{position:relative; width:150px; height:150px; margin:4px auto 8px}
.wheel{width:150px; height:150px; transform:rotate(0); filter:drop-shadow(0 6px 14px rgba(0,0,0,.35))}
.wheel-ptr{position:absolute; top:-4px; left:50%; transform:translateX(-50%); font-size:18px; color:var(--fg); z-index:2}
.wheel.win{filter:drop-shadow(0 0 12px var(--accent)); transition:filter .3s}
@keyframes fadeIn{from{opacity:0; transform:scale(.92)}to{opacity:1; transform:none}}
.wheel-q{display:block; margin:6px auto 0; max-width:100%; padding:8px 10px; border-radius:10px; border:1px solid var(--border);
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--accent); font-size:13px; font-weight:600; cursor:pointer; text-align:center}
.wheel-q:hover{border-color:var(--accent)}

/* 🔮 魔法 8 球 */
.ball8{width:84px; height:84px; border-radius:50%; margin:4px auto; background:radial-gradient(circle at 35% 30%, #4a4a55, #0a0a0e);
  display:flex; align-items:center; justify-content:center; box-shadow:inset 0 0 18px #000, 0 6px 16px rgba(0,0,0,.4); cursor:pointer}
.ball8-ans{color:#c4b5fd; font-size:11px; font-weight:700; text-align:center; padding:0 10px; text-shadow:0 0 8px #a78bfa; line-height:1.35}
.ball8.shake{animation:shake .5s}

/* 🎲 骰子 */
.die{width:64px; height:64px; margin:8px auto; border-radius:14px; background:linear-gradient(145deg,#fff,#dfe5f3); color:#222;
  display:flex; align-items:center; justify-content:center; font-weight:800; font-size:30px; cursor:pointer; box-shadow:0 6px 14px rgba(0,0,0,.3); user-select:none}
.die.roll{animation:roll .4s}

/* 🪙 许愿池 */
.well{width:100px; height:62px; margin:6px auto; border-radius:0 0 60px 60px / 0 0 42px 42px; background:radial-gradient(ellipse at 50% 0,#1b2a4a,#0a1330);
  position:relative; overflow:hidden; cursor:pointer; box-shadow:inset 0 6px 14px rgba(0,0,0,.5)}
.well-water{position:absolute; inset:auto 0 0 0; height:26px; background:linear-gradient(#3aa0ff66,#1f6fff44); animation:wave 3s ease-in-out infinite alternate}
.coin{position:absolute; top:6px; left:50%; transform:translateX(-50%); font-size:22px; transition:none}
.coin.drop{animation:coinDrop .6s forwards}
.fortune{margin-top:8px; font-size:13px; font-weight:700; text-align:center; line-height:1.6; color:var(--fg)}
@keyframes coinDrop{0%{top:6px; opacity:1}60%{top:34px; opacity:1}100%{top:42px; opacity:0}}

/* 🎯 刮刮乐 */
.scratch{position:relative; width:100%; max-width:340px; margin:0 auto; border-radius:12px; overflow:hidden; background:var(--panel); min-height:120px}
.scratch-ans{position:absolute; inset:0; display:flex; flex-direction:column; justify-content:center; padding:14px; font-size:13px; line-height:1.5}
.scratch-ans b{color:var(--accent); margin-bottom:4px}
.scratch-cv{position:relative; display:block; width:100%; height:120px; cursor:grab; touch-action:none}
.scratch-cv:active{cursor:grabbing}

/* 🎮 更多玩法 chips */
.mode-chips{display:flex; flex-wrap:wrap; gap:8px}
.mode-chip{padding:8px 13px; border-radius:999px; border:1px solid var(--border); background:color-mix(in srgb,var(--bg2) 70%,transparent);
  color:var(--fg); font-weight:600; font-size:13px; cursor:pointer; transition:transform .15s, border-color .15s, color .15s}
.mode-chip:hover{transform:translateY(-2px); border-color:var(--accent); color:var(--accent)}

/* 📜 跑马灯 */
.ticker{overflow:hidden; white-space:nowrap; border-top:1px dashed var(--border); border-bottom:1px dashed var(--border); padding:9px 0; margin-top:4px}
.ticker-track{display:inline-block; animation:marquee 32s linear infinite; font-size:13px}
.ticker:hover .ticker-track{animation-play-state:paused}
.tk-item{color:var(--accent); cursor:pointer; padding:0 4px}
.tk-item:hover{text-decoration:underline}
.tk-sep{color:var(--fg3); padding:0 6px}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* 🫧 漂浮泡泡 */
.bubble-pool{position:relative; height:210px; overflow:hidden; border-radius:12px; background:radial-gradient(circle at 30% 20%, color-mix(in srgb,var(--accent) 12%,transparent), transparent 60%)}
.bubble{position:absolute; width:46px; height:46px; border-radius:50%; border:1px solid color-mix(in srgb,var(--c) 60%,#fff);
  background:radial-gradient(circle at 30% 30%, #fff, var(--c)); color:#fff; font-size:20px; cursor:pointer;
  box-shadow:0 4px 12px color-mix(in srgb,var(--c) 40%,transparent); animation:floaty 9s ease-in-out infinite; transition:transform .15s}
.bubble:hover{transform:scale(1.18)}
@keyframes floaty{0%{transform:translateY(0)}50%{transform:translateY(-14px)}100%{transform:translateY(0)}}

@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(4px)}}
@keyframes roll{0%{transform:rotate(0) scale(1)}50%{transform:rotate(180deg) scale(1.15)}100%{transform:rotate(360deg) scale(1)}}
@keyframes wave{from{transform:translateX(-6px)}to{transform:translateX(6px)}}

@media (max-width:1024px){
  .cw-gacha,.cw-wheel,.cw-8ball,.cw-die,.cw-well,.cw-scratch,.cw-galaxy,.cw-modes,.cw-bubbles,.cw-trail{grid-column:span 6}
  .cw-ticker,.cw-adv{grid-column:span 12}
}
@media (max-width:640px){
  .cw-gacha,.cw-wheel,.cw-8ball,.cw-die,.cw-well,.cw-scratch,.cw-galaxy,.cw-modes,.cw-bubbles,.cw-trail,.cw-ticker,.cw-adv{grid-column:span 12}
  .tilt-a,.tilt-b{transform:none}
  .cw-card{padding:14px 14px}
  .cw-top{flex-direction:column; align-items:flex-start; gap:8px}
}
@media (max-width:480px){
  .carnival{gap:12px; padding:10px 2px 32px}
  .cw-btn{width:100%}
}

/* ================= 吉祥物 + 儿童模式 + 朗读 ================= */
/* 首页漂浮吉祥物（会呼吸） */
.mascot{position:absolute; right:6%; top:16%; font-size:62px; z-index:1; pointer-events:none;
  filter:drop-shadow(0 10px 18px rgba(0,0,0,.18)); animation:breathe 3.6s ease-in-out infinite}
@keyframes breathe{0%,100%{transform:translateY(0) rotate(-4deg) scale(1)}50%{transform:translateY(-12px) rotate(4deg) scale(1.06)}}
html.dark .mascot{filter:drop-shadow(0 10px 22px rgba(120,160,255,.5))}

/* 详情页大 emoji 主图 + 朗读按钮 */
.detail-head{display:flex; align-items:center; gap:14px; flex-wrap:wrap}
.q-emoji{font-size:46px; line-height:1; filter:drop-shadow(0 6px 10px rgba(0,0,0,.18)); animation:breathe 4s ease-in-out infinite}
html.dark .q-emoji{filter:drop-shadow(0 6px 12px rgba(120,160,255,.45))}
.tts-btn{margin-left:auto; padding:6px 14px; border-radius:999px; border:1px solid var(--border);
  background:color-mix(in srgb,var(--bg2) 70%,transparent); color:var(--accent); cursor:pointer; font-size:13px; font-weight:700; transition:all .15s}
.tts-btn:hover{border-color:var(--accent); transform:translateY(-1px)}
.tts-btn:active{background:var(--accent); color:#fff}

/* 儿童模式：更大、更圆、更友好 */
body.kids{ --radius:22px; --radius-sm:15px; font-size:17px; }
body.kids .hero{ border-radius:30px; }
body.kids .cta{ font-size:17px; padding:14px 26px; }
body.kids .qitem .q{ font-size:18px; }
body.kids .detail .body{ font-size:17px; line-height:1.9; }
body.kids .btn#kids{ background:linear-gradient(120deg,var(--accent),var(--accent2)); color:#fff; border-color:transparent }
body.kids .mascot{ font-size:86px; right:8%; }
body.kids .cw-card{ min-height:140px; }

/* 儿童启动台 */
.kids-launch{max-width:780px; margin:0 auto; padding:18px 10px 40px}
.kids-banner{text-align:center; font-size:20px; font-weight:800; margin:6px 0 18px; color:var(--fg)}
.kids-banner small{display:block; font-size:13px; color:var(--fg3); font-weight:600; margin-top:4px}
.kids-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
.kcard{display:flex; flex-direction:column; align-items:center; gap:6px; padding:22px 12px; cursor:pointer;
  border-radius:24px; border:1px solid var(--border);
  background:linear-gradient(160deg,color-mix(in srgb,var(--panel) 95%,transparent),color-mix(in srgb,var(--panel) 75%,transparent));
  box-shadow:var(--shadow); transition:transform .16s, box-shadow .16s, border-color .16s; animation:cardIn .5s ease both}
.kcard:hover{transform:translateY(-5px); box-shadow:var(--shadow-lg); border-color:var(--border-strong)}
.kcard .kic{font-size:44px; line-height:1; filter:drop-shadow(0 6px 10px rgba(0,0,0,.18))}
.kcard b{font-size:17px; font-weight:800}
.kcard i{font-size:12px; color:var(--fg3); font-style:normal}

/* 儿童轻互动 */
body.kids .play-area .g-card{font-size:17px}
.kids-card .g-q{font-size:22px; line-height:1.5}
.g-right.big,.g-wrong.big{font-size:18px; padding:14px 28px; font-weight:800}
.tf-ans,.fill-ans{padding:14px 16px; border-radius:var(--radius-sm); border-left:3px solid var(--accent2);
  background:color-mix(in srgb,var(--accent2) 9%,transparent); font-size:16px; line-height:1.75; margin:10px 0}
.qem,.sem{margin-right:6px}
@media (max-width:560px){ .kids-grid{grid-template-columns:repeat(2,1fr)} }


/* ============================================================
   单题静态页 www/q/<cat>/<scat>/<slug>/index.html
   —— 纯静态、可索引；全部沿用既有 CSS 变量以自动适配深浅色
   ============================================================ */
.qpage{background:var(--bg); color:var(--fg); min-height:100vh;
  padding-bottom:48px}

.qhead{display:flex; flex-wrap:wrap; align-items:center; gap:14px;
  padding:14px 20px; background:var(--panel);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(var(--glass-blur)); position:sticky; top:0; z-index:5}
.qhead .brand{text-decoration:none}
.qhead .crumbs{flex:1; min-width:200px; font-size:13px; color:var(--fg2);
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.qhead .crumbs a{color:var(--accent); text-decoration:none}
.qhead .crumbs a:hover{text-decoration:underline}
.qsearch input{padding:7px 12px; border-radius:999px; min-width:180px;
  border:1px solid var(--border); background:var(--bg2); color:var(--fg);
  font-size:13px; outline:none}
.qsearch input:focus{border-color:var(--accent)}

.qpage main{max-width:820px; margin:26px auto; padding:0 20px}

.qa{background:var(--panel); border:1px solid var(--border);
  border-radius:var(--radius); padding:26px 28px; box-shadow:var(--shadow)}
.qa h1{margin:0 0 8px; font-size:26px; line-height:1.4; color:var(--fg)}
.qa .q-en{margin:0 0 20px; font-size:16px; line-height:1.5; color:var(--fg2);
  font-style:italic}
.qa .a-zh{font-size:16.5px; line-height:1.85; color:var(--fg)}
.qa .a-en{margin-top:14px; padding-top:14px; border-top:1px dashed var(--border);
  font-size:15px; line-height:1.75; color:var(--fg2)}

.srcbox{margin:24px 0 0; padding:16px 18px; border-radius:var(--radius-sm);
  background:var(--bg2); border:1px solid var(--border); border-left:3px solid var(--accent)}
.srcbox h2{margin:0 0 8px; font-size:13px; text-transform:uppercase;
  letter-spacing:.6px; color:var(--fg3); font-weight:700}
.srcbox p{margin:0 0 6px; font-size:13.5px; line-height:1.6; color:var(--fg2)}
.srcbox .lic{margin-top:10px; font-size:12px; color:var(--fg3)}
.srcbox .fix{margin-top:4px}
.srcbox .fix a{color:var(--accent); text-decoration:none; font-size:12.5px}
.srcbox .fix a:hover{text-decoration:underline}

.badge{display:inline-block; padding:1px 8px; border-radius:999px;
  font-size:11.5px; font-weight:600}
.badge.ok{background:rgba(31,214,182,.16); color:#0f9c86;
  border:1px solid rgba(31,214,182,.4)}
.badge.warn{background:rgba(250,204,21,.14); color:#a16207;
  border:1px solid rgba(250,204,21,.42)}

.chips{list-style:none; display:flex; flex-wrap:wrap; gap:8px;
  margin:22px 0 0; padding:0}
.chips li{font-size:12px; padding:3px 10px; border-radius:999px;
  background:var(--bg2); border:1px solid var(--border); color:var(--fg2)}
.chips a{color:inherit; text-decoration:none}
.chips a:hover{color:var(--accent)}

.tagrow{margin:14px 0 0; font-size:12.5px; line-height:2}
.tagrow .tag{display:inline-block; margin-right:8px; color:var(--fg3);
  text-decoration:none}
.tagrow .tag:hover{color:var(--accent)}

.related{margin:22px 0 0; background:var(--panel);
  border:1px solid var(--border); border-radius:var(--radius); padding:18px 22px}
.related h2{margin:0 0 10px; font-size:13px; text-transform:uppercase;
  letter-spacing:.6px; color:var(--fg3); font-weight:700}
.related ul{margin:0; padding:0; list-style:none}
.related li{padding:6px 0; border-bottom:1px solid var(--border)}
.related li:last-child{border-bottom:0}
.related a{color:var(--fg); text-decoration:none; font-size:14.5px}
.related a:hover{color:var(--accent)}

.qpage .foot{max-width:820px; margin:0 auto; padding:0 20px;
  font-size:12.5px; color:var(--fg3)}
.qpage .foot a{color:var(--accent); text-decoration:none}

@media (max-width:640px){
  .qa{padding:20px 18px}
  .qa h1{font-size:21px}
  .qhead .qsearch{order:3; width:100%}
  .qsearch input{width:100%}
}
@media (prefers-reduced-motion:no-preference){
  .qhead{animation:qheadIn .3s ease}
  @keyframes qheadIn{from{opacity:0; transform:translateY(-6px)}
                     to{opacity:1; transform:none}}
}


/* ============================================================
   方案B 子分类聚合页 www/topic/<cat>/<scat>/
   ============================================================ */
.topic-hero{margin:0 0 22px; padding:24px 26px; border-radius:var(--radius);
  background:linear-gradient(135deg,var(--panel),var(--bg2));
  border:1px solid var(--border); box-shadow:var(--shadow)}
.topic-hero h1{margin:0 0 6px; font-size:27px; line-height:1.35; color:var(--fg)}
.topic-hero h1 .en{font-size:15px; font-weight:500; color:var(--fg3);
  margin-left:10px; letter-spacing:.3px}
.topic-hero .zh{margin:0 0 10px; font-size:15px; color:var(--fg2)}
.topic-hero .cnt{margin:0; font-size:13px; color:var(--fg3)}
.topic-hero .cnt b{color:var(--accent); font-size:19px; margin-right:3px}

.toc{margin:0 0 24px; padding:16px 20px; border-radius:var(--radius-sm);
  background:var(--panel); border:1px solid var(--border)}
.toc h2{margin:0 0 10px; font-size:12.5px; text-transform:uppercase;
  letter-spacing:.6px; color:var(--fg3); font-weight:700}
.toc ul{margin:0; padding:0; list-style:none;
  columns:2; column-gap:26px}
.toc li{margin:0 0 5px; break-inside:avoid; font-size:13.5px; line-height:1.5}
.toc a{color:var(--fg2); text-decoration:none}
.toc a:hover{color:var(--accent)}

.qitem{margin:0 0 16px; padding:20px 22px; border-radius:var(--radius);
  background:var(--panel); border:1px solid var(--border);
  box-shadow:var(--shadow)}
.qitem h2.qz{margin:0 0 6px; font-size:18px; line-height:1.5; color:var(--fg)}
.qitem .qen{margin:0 0 14px; font-size:14px; line-height:1.55; color:var(--fg2);
  font-style:italic}
.qitem .azh{font-size:15.5px; line-height:1.85; color:var(--fg)}
.qitem .aen{margin-top:10px; padding-top:10px;
  border-top:1px dashed var(--border); font-size:14px; line-height:1.75; color:var(--fg2)}

.qitem .meta{display:flex; flex-wrap:wrap; gap:14px; margin-top:14px;
  font-size:11.5px; color:var(--fg3)}
.qitem .meta .lic{color:var(--fg3)}

.srcdet{margin-top:12px; padding:9px 13px; border-radius:var(--radius-sm);
  background:var(--bg2); border:1px solid var(--border);
  border-left:3px solid var(--accent)}
.srcdet summary{cursor:pointer; font-size:12px; letter-spacing:.4px;
  color:var(--fg3); font-weight:600; list-style:none}
.srcdet summary::-webkit-details-marker{display:none}
.srcdet summary::before{content:"▸ "; color:var(--accent)}
.srcdet[open] summary::before{content:"▾ "}
.srcdet p{margin:8px 0 0; font-size:13px; line-height:1.6; color:var(--fg2)}
.srcdet .fix a{color:var(--accent); text-decoration:none; font-size:12px}
.srcdet .fix a:hover{text-decoration:underline}

.qitem .tag{display:inline-block; margin:10px 8px 0 0; font-size:11.5px;
  color:var(--fg3); text-decoration:none}

@media (max-width:760px){
  .topic-hero h1{font-size:22px}
  .toc ul{columns:1}
  .qitem{padding:16px 16px}
}
@media (prefers-reduced-motion:no-preference){
  .topic-hero{animation:tpIn .32s ease}
  @keyframes tpIn{from{opacity:0; transform:translateY(-8px)}
                  to{opacity:1; transform:none}}
}


/* ============ 知识路径页 www/path/<id>/ ============ */
.pathflow{display:flex; flex-direction:column; gap:0}
.stop{position:relative; padding:18px 22px 18px 74px; background:var(--panel);
  border:1px solid var(--border); border-radius:var(--radius); margin-bottom:12px}
.stop::before{content:''; position:absolute; left:42px; top:0; bottom:-13px;
  width:2px; background:var(--border)}
.stop:last-child::before{bottom:auto; height:34px}
.stop .no{position:absolute; left:16px; top:18px; width:28px; height:28px;
  border-radius:50%; background:var(--accent); color:#fff; display:flex;
  align-items:center; justify-content:center; font-size:13px; font-weight:700; z-index:1}
.stop h2{margin:0 0 4px; font-size:17px; color:var(--fg)}
.stop h2 .en{margin-left:10px; font-size:13px; font-weight:500; color:var(--fg3)}
.stop .cnt{margin:0 0 10px; font-size:12px; color:var(--fg3)}
.stop .scats{list-style:none; margin:0; padding:0; display:flex;
  flex-wrap:wrap; gap:8px}
.stop .scats li{display:flex; align-items:center; gap:6px; font-size:13px;
  padding:4px 11px; border-radius:999px; background:var(--bg2);
  border:1px solid var(--border)}
.stop .scats a{color:var(--fg); text-decoration:none}
.stop .scats a:hover{color:var(--accent)}
.stop .scats .n{color:var(--fg3); font-size:11px}


/* ===== 首页导航区（build_nav.py 注入）===== */
.explore{margin:26px auto; max-width:980px; padding:0 18px}
.explore > h2{margin:0 0 16px; font-size:19px; color:var(--fg); font-weight:800}
.explore-sec{margin:0 0 20px}
.explore-sec h2{margin:0 0 10px; font-size:14px; color:var(--fg3);
  text-transform:uppercase; letter-spacing:.6px; font-weight:700}
.explore-sec h2 .en{color:var(--fg3); font-weight:500; margin-left:8px; text-transform:none}
.explore-grid{list-style:none; margin:0; padding:0; display:flex;
  flex-wrap:wrap; gap:9px}
.explore-grid li{margin:0}
.explore-grid a{display:flex; flex-direction:column; gap:2px;
  padding:9px 13px; border-radius:var(--radius-sm);
  background:var(--panel); border:1px solid var(--border);
  text-decoration:none; min-width:118px; transition:border-color .15s, transform .15s}
.explore-grid a:hover{border-color:var(--accent); transform:translateY(-1px)}
.explore-grid .t{font-size:13.5px; color:var(--fg); font-weight:600; line-height:1.35}
.explore-grid .e{font-size:11px; color:var(--fg3); line-height:1.3}

@media (max-width:560px){
  .explore-grid a{min-width:0; flex:1 1 44%}
}

/* 「结论有争议」徽章: 刻意用醒目暖红, 与 ok(绿)/warn(黄) 区分 */
.badge.contested{background:rgba(248,113,113,.16); color:#dc2626; font-weight:700}
.badge.contested::before{content:"\26A0\FE0E "; font-weight:400}

/* 独立核验依据链接: 让读者能自己去出版社页面核对 */
.evlinks{margin:.5em 0 0;padding:.5em .7em;border-left:3px solid #0f9c86;background:rgba(31,214,182,.06);border-radius:4px;font-size:.9em}
.evlink{color:#0f9c86;text-decoration:none;border-bottom:1px dotted currentColor;margin-right:.4em}
.evlink:hover{color:#0b7a68;border-bottom-style:solid}