/* ============ H5小游戏门户 · 主题变量（亮/暗双主题：默认跟随系统 + 顶栏手动切换） ============ */
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
:root{
  /* 强调色（双主题共用） */
  --orange:#ff7a45;--orange2:#ff9a62;--gold:#ffd76e;--pink:#ff5d7e;
  --radius:16px;
  /* ---- 亮色主题（默认） ---- */
  --bg1:#e7ebf9;--bg2:#f6f7fc;--bg3:#edf0f9;
  --txt:#2b3149;--sub:#5a6480;--faint:#7b84a0;--txt-strong:#1d2338;
  --topbar:rgba(247,248,252,.88);--topbar-brd:rgba(30,40,80,.10);--topbar-shadow:0 6px 24px rgba(40,55,110,.10);
  --panel:rgba(30,40,80,.05);--brd:rgba(30,40,80,.12);
  --field:rgba(30,40,80,.06);--field-brd:rgba(30,40,80,.14);--field-focus:rgba(30,40,80,.10);
  --chip-bg:rgba(30,40,80,.05);--chip-brd:rgba(30,40,80,.14);--chip-txt:#3d4562;--chip-hover:rgba(30,40,80,.11);--chip-n-bg:rgba(30,40,80,.10);
  --card-hi:rgba(255,255,255,.94);--card-lo:rgba(255,255,255,.62);--hair:rgba(30,40,80,.16);
  --card-shadow:0 4px 16px rgba(40,55,110,.10);--card-shadow-hover:0 12px 26px rgba(40,55,110,.20);
  --icon-inset:inset 0 1px 0 rgba(255,255,255,.75);
  --cat-bg:rgba(255,255,255,.88);--cat-brd:rgba(180,125,20,.40);
  --fav-bg:rgba(255,255,255,.78);--fav-txt:rgba(40,50,90,.38);
  --btn2:rgba(30,40,80,.13);--btn2-txt:#3d4562;
  --gold-txt:#a97a12;--gold-brd:rgba(180,125,20,.40);--gold-soft:rgba(190,140,20,.12);
  --scroll:rgba(30,40,80,.22);--scroll-track:rgba(30,40,80,.08);
  --sk1:rgba(30,40,80,.09);--sk2:rgba(30,40,80,.18);
  --mark-bg:rgba(255,215,110,.60);
  --overlay:rgba(28,34,60,.58);--pm-bar:rgba(250,250,253,.94);
  --focus-ring:rgba(190,125,20,.75);
  color-scheme:light;
}
/* ---- 暗色主题：手动切换（html[data-theme=dark]） ---- */
:root[data-theme="dark"]{
  --bg1:#242c50;--bg2:#1b1f2e;--bg3:#12141f;
  --txt:#e8ebf7;--sub:#9aa4c7;--faint:#8891b5;--txt-strong:#f2f4fb;
  --topbar:rgba(19,23,42,.82);--topbar-brd:rgba(255,255,255,.08);--topbar-shadow:0 6px 24px rgba(0,0,0,.35);
  --panel:rgba(255,255,255,.055);--brd:rgba(255,255,255,.09);
  --field:rgba(255,255,255,.08);--field-brd:rgba(255,255,255,.12);--field-focus:rgba(255,255,255,.12);
  --chip-bg:rgba(255,255,255,.06);--chip-brd:rgba(255,255,255,.13);--chip-txt:#c6cdea;--chip-hover:rgba(255,255,255,.13);--chip-n-bg:rgba(255,255,255,.14);
  --card-hi:rgba(255,255,255,.085);--card-lo:rgba(255,255,255,.03);--hair:rgba(255,255,255,.25);
  --card-shadow:0 4px 16px rgba(0,0,0,.28);--card-shadow-hover:0 12px 26px rgba(0,0,0,.42);
  --icon-inset:inset 0 1px 0 rgba(255,255,255,.16);
  --cat-bg:rgba(13,16,30,.6);--cat-brd:rgba(255,215,110,.35);
  --fav-bg:rgba(13,16,30,.5);--fav-txt:rgba(230,234,247,.42);
  --btn2:rgba(255,255,255,.16);--btn2-txt:#c6cdea;
  --gold-txt:var(--gold);--gold-brd:rgba(255,215,110,.35);--gold-soft:rgba(255,215,110,.1);
  --scroll:rgba(255,255,255,.13);--scroll-track:rgba(255,255,255,.07);
  --sk1:rgba(255,255,255,.07);--sk2:rgba(255,255,255,.16);
  --mark-bg:rgba(255,215,110,.38);
  --overlay:rgba(8,10,20,.74);--pm-bar:rgba(19,23,42,.94);
  --focus-ring:rgba(255,215,110,.7);
  color-scheme:dark;
}
/* ---- 暗色主题：跟随系统（未手动强制亮色时） ---- */
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg1:#242c50;--bg2:#1b1f2e;--bg3:#12141f;
    --txt:#e8ebf7;--sub:#9aa4c7;--faint:#8891b5;--txt-strong:#f2f4fb;
    --topbar:rgba(19,23,42,.82);--topbar-brd:rgba(255,255,255,.08);--topbar-shadow:0 6px 24px rgba(0,0,0,.35);
    --panel:rgba(255,255,255,.055);--brd:rgba(255,255,255,.09);
    --field:rgba(255,255,255,.08);--field-brd:rgba(255,255,255,.12);--field-focus:rgba(255,255,255,.12);
    --chip-bg:rgba(255,255,255,.06);--chip-brd:rgba(255,255,255,.13);--chip-txt:#c6cdea;--chip-hover:rgba(255,255,255,.13);--chip-n-bg:rgba(255,255,255,.14);
    --card-hi:rgba(255,255,255,.085);--card-lo:rgba(255,255,255,.03);--hair:rgba(255,255,255,.25);
    --card-shadow:0 4px 16px rgba(0,0,0,.28);--card-shadow-hover:0 12px 26px rgba(0,0,0,.42);
    --icon-inset:inset 0 1px 0 rgba(255,255,255,.16);
    --cat-bg:rgba(13,16,30,.6);--cat-brd:rgba(255,215,110,.35);
    --fav-bg:rgba(13,16,30,.5);--fav-txt:rgba(230,234,247,.42);
    --btn2:rgba(255,255,255,.16);--btn2-txt:#c6cdea;
    --gold-txt:var(--gold);--gold-brd:rgba(255,215,110,.35);--gold-soft:rgba(255,215,110,.1);
    --scroll:rgba(255,255,255,.13);--scroll-track:rgba(255,255,255,.07);
    --sk1:rgba(255,255,255,.07);--sk2:rgba(255,255,255,.16);
    --mark-bg:rgba(255,215,110,.38);
    --overlay:rgba(8,10,20,.74);--pm-bar:rgba(19,23,42,.94);
    --focus-ring:rgba(255,215,110,.7);
    color-scheme:dark;
  }
}
html{-webkit-text-size-adjust:100%;background:var(--bg2)}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--txt);min-height:100vh;background:transparent}
/* 与游戏页同款夜空/晨空渐变底（固定铺满，不随内容拉伸） */
body::before{content:"";position:fixed;inset:0;z-index:-1;background:radial-gradient(120% 90% at 50% 0%,var(--bg1) 0%,var(--bg2) 45%,var(--bg3) 100%)}
[hidden]{display:none!important}
button{font-family:inherit}
body.modal-open{overflow:hidden} /* 弹窗打开时的滚动锁 */
::selection{background:rgba(255,122,69,.45)}
body::-webkit-scrollbar{width:9px}
body::-webkit-scrollbar-thumb{background:var(--scroll);border-radius:5px}
body::-webkit-scrollbar-track{background:transparent}
a:focus-visible,button:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}
mark{background:var(--mark-bg);color:inherit;border-radius:3px;padding:0 1px}

/* ---------- 顶栏：logo + 搜索框 + 主题/随机按钮 + 分类chips（吸顶毛玻璃） ---------- */
.topbar{position:sticky;top:0;z-index:50;padding:calc(10px + env(safe-area-inset-top)) 12px 0;
  background:var(--topbar);backdrop-filter:blur(14px) saturate(1.35);-webkit-backdrop-filter:blur(14px) saturate(1.35);
  border-bottom:1px solid var(--topbar-brd);box-shadow:var(--topbar-shadow)}
.top-row{display:flex;align-items:center;gap:10px;padding-bottom:10px}
.logo{color:var(--txt-strong);font-weight:800;font-size:18px;white-space:nowrap;display:flex;align-items:center;gap:5px;text-shadow:0 2px 8px rgba(0,0,0,.12)}
.logo span{background:linear-gradient(92deg,#e8a020 10%,#ff7a45 90%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
:root[data-theme="dark"] .logo span{background:linear-gradient(92deg,#ffd76e 10%,#ff9a62 90%);-webkit-background-clip:text;background-clip:text}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]) .logo span{background:linear-gradient(92deg,#ffd76e 10%,#ff9a62 90%);-webkit-background-clip:text;background-clip:text}}
.search-box{flex:1;display:flex;align-items:center;gap:6px;min-width:0;padding:0 6px 0 11px;border-radius:999px;
  background:var(--field);border:1px solid var(--field-brd);
  transition:border-color .2s,box-shadow .2s,background .2s}
.search-box:focus-within{border-color:rgba(255,154,98,.65);background:var(--field-focus);box-shadow:0 0 0 3px rgba(255,122,69,.16)}
.s-icon{font-size:13px;opacity:.65;pointer-events:none}
#searchInput{flex:1;min-width:0;border:0;outline:0;background:transparent;color:var(--txt);font-size:14px;padding:9px 0;border-radius:999px}
#searchInput::placeholder{color:var(--faint)}
#searchInput::-webkit-search-cancel-button,#searchInput::-webkit-search-decoration{-webkit-appearance:none;display:none}
.s-clear{flex:0 0 auto;width:21px;height:21px;border:0;border-radius:50%;background:var(--btn2);color:var(--btn2-txt);font-size:11px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .12s,background .15s}
.s-clear:hover{background:var(--chip-hover)}
.s-clear:active{transform:scale(.82)}
.theme-btn{flex:0 0 auto;width:34px;height:34px;border:1px solid var(--chip-brd);border-radius:50%;background:var(--chip-bg);font-size:16px;line-height:1;cursor:pointer;touch-action:manipulation;display:flex;align-items:center;justify-content:center;transition:transform .12s,background .15s,border-color .15s}
.theme-btn:hover{background:var(--chip-hover)}
.theme-btn:active{transform:scale(.88)}
.random-btn{flex:0 0 auto;border:1px solid var(--gold-brd);border-radius:999px;padding:8px 14px;font-size:13px;font-weight:600;letter-spacing:1px;cursor:pointer;touch-action:manipulation;white-space:nowrap;color:var(--gold-txt);
  background:linear-gradient(135deg,rgba(255,215,110,.20),rgba(255,122,69,.18));
  transition:transform .14s,filter .15s,box-shadow .15s}
.random-btn:hover{filter:brightness(1.06);box-shadow:0 3px 14px rgba(255,122,69,.25)}
.random-btn:active{transform:scale(.92)}
@media(max-width:430px){.random-btn{padding:8px 12px}.random-btn .rb-txt{display:none}}
.chips{display:flex;gap:8px;overflow-x:auto;padding:0 12px 10px;scrollbar-width:none;-ms-overflow-style:none;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain}
.chips::-webkit-scrollbar{display:none}
.chip{position:relative;flex:0 0 auto;border:1px solid var(--chip-brd);background:var(--chip-bg);color:var(--chip-txt);border-radius:999px;padding:6px 15px;font-size:13px;cursor:pointer;touch-action:manipulation;transition:transform .15s,background .18s,color .18s,border-color .18s,box-shadow .18s}
.chip:hover{background:var(--chip-hover);color:var(--txt-strong)}
.chip:active{transform:scale(.92)}
.chip.on{background:linear-gradient(135deg,var(--orange2),var(--orange));color:#fff;font-weight:700;border-color:rgba(255,255,255,.28);box-shadow:0 3px 14px rgba(255,122,69,.45)}
/* chips 激活态底部指示条（滑动小动画） */
.chip::after{content:"";position:absolute;left:22%;right:22%;bottom:1px;height:3px;border-radius:3px;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.3);
  opacity:0;transform:scaleX(.2);transform-origin:center;transition:opacity .2s ease,transform .25s cubic-bezier(.2,1.2,.4,1);pointer-events:none}
.chip.on::after{opacity:.95;transform:scaleX(1)}
/* 分类数量小徽标 */
.chip .chip-n{display:inline-block;min-width:14px;padding:0 5px;margin-left:6px;font-size:10px;line-height:15px;font-weight:500;border-radius:999px;background:var(--chip-n-bg);opacity:.85;vertical-align:1px;letter-spacing:0}
.chip.on .chip-n{background:rgba(255,255,255,.28);opacity:1}

/* ---------- 广告位容器（ad.js 渲染，契约不动） ---------- */
#bannerAd{max-width:1056px;margin:0 auto;padding:12px 12px 0}
.ad-banner{border-radius:14px;overflow:hidden;position:relative}
.ad-slot{border:1.5px dashed rgba(255,154,98,.45);background:linear-gradient(135deg,rgba(255,122,69,.12),rgba(255,215,110,.05));color:var(--orange2);display:flex;align-items:center;justify-content:center;min-height:58px;font-size:14px;font-weight:600;letter-spacing:2px}
.ad-slot::after{content:"广告";position:absolute;right:0;top:0;font-size:10px;letter-spacing:0;font-weight:400;color:var(--btn2-txt);background:var(--btn2);padding:1px 7px;border-radius:0 0 0 8px}
.ad-live{background:#fff;min-height:58px;text-align:center}
.ad-live *{max-width:100%}
.ad-link{display:block;text-decoration:none;color:inherit;grid-column:1/-1}
.ad-feed{grid-column:1/-1}
.ad-feed.ad-slot{min-height:46px;font-size:13px}

/* ---------- 主体布局 / 区块标题（emoji + 渐变装饰） ---------- */
main{padding:12px 12px 30px;max-width:1056px;margin:0 auto}
section{margin-bottom:26px}
h2{font-size:17px;display:flex;align-items:center;gap:8px;margin-bottom:12px;font-weight:800;letter-spacing:.5px;color:var(--txt-strong)}
h2::before{content:"";flex:0 0 4px;width:4px;height:18px;border-radius:2px;background:linear-gradient(180deg,var(--gold),var(--orange));box-shadow:0 0 10px rgba(255,122,69,.55)}
h2::after{content:"";flex:1;height:1px;margin:0 2px 0 6px;background:linear-gradient(90deg,rgba(255,122,69,.4),rgba(255,122,69,0))}
.count{flex:0 0 auto;font-size:11px;font-weight:500;color:var(--gold-txt);background:var(--gold-soft);border:1px solid var(--gold-brd);border-radius:999px;padding:3px 10px;margin-left:2px;letter-spacing:.5px;white-space:nowrap}
.load-prog{flex:0 0 auto;font-size:11px;font-weight:500;color:var(--sub);letter-spacing:.5px;margin-left:8px;white-space:nowrap}

/* ---------- 排序切换（全部游戏区） ---------- */
.sort-bar{display:flex;gap:8px;margin:-2px 0 12px}
.sort-btn{border:1px solid var(--chip-brd);background:var(--chip-bg);color:var(--chip-txt);border-radius:999px;padding:5px 14px;font-size:12px;cursor:pointer;touch-action:manipulation;transition:transform .12s,background .18s,color .18s,border-color .18s}
.sort-btn:hover{background:var(--chip-hover)}
.sort-btn:active{transform:scale(.93)}
.sort-btn.on{background:linear-gradient(135deg,var(--orange2),var(--orange));color:#fff;font-weight:700;border-color:transparent;box-shadow:0 2px 10px rgba(255,122,69,.4)}

/* ---------- 游戏卡片网格：2列 → 3列 → 4列 ---------- */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media(min-width:520px){.grid{grid-template-columns:repeat(3,1fr);gap:14px}.hscroll .card{flex-basis:150px}}
@media(min-width:820px){.grid{grid-template-columns:repeat(4,1fr);gap:16px}}

/* ---------- 游戏卡片：大 emoji 图标 + 名称 + 简介 + 分类徽章 + 收藏心形 ----------
   content-visibility:auto：屏外卡片跳过布局/绘制，长列表（2000+）渲染开销大幅下降 */
.card{position:relative;display:block;text-decoration:none;color:inherit;cursor:pointer;overflow:hidden;text-align:center;
  padding:14px 8px 12px;border-radius:var(--radius);
  background:linear-gradient(165deg,var(--card-hi),var(--card-lo) 70%);
  border:1px solid var(--brd);box-shadow:var(--card-shadow);
  content-visibility:auto;contain-intrinsic-size:150px;contain-intrinsic-size:auto 150px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  animation:cardIn .4s cubic-bezier(.2,1.1,.35,1) backwards}
.card::before{content:"";position:absolute;top:0;left:12%;right:12%;height:1px;background:linear-gradient(90deg,transparent,var(--hair),transparent)}
.card:hover{transform:translateY(-4px);border-color:rgba(255,154,98,.5);box-shadow:var(--card-shadow-hover),0 0 0 1px rgba(255,122,69,.22)}
.card:active{transform:scale(.97)}
.card .icon{width:64px;height:64px;margin:0 auto 10px;border-radius:18px;display:flex;align-items:center;justify-content:center;font-size:34px;
  box-shadow:var(--icon-inset),0 6px 14px rgba(0,0,0,.18);transition:transform .2s cubic-bezier(.2,1.2,.4,1)}
.card:hover .icon{transform:scale(1.07) rotate(-3deg)}
.card:nth-child(8n+1) .icon{background:linear-gradient(145deg,rgba(255,122,69,.30),rgba(255,122,69,.10))}
.card:nth-child(8n+2) .icon{background:linear-gradient(145deg,rgba(97,124,255,.30),rgba(97,124,255,.10))}
.card:nth-child(8n+3) .icon{background:linear-gradient(145deg,rgba(72,199,142,.30),rgba(72,199,142,.10))}
.card:nth-child(8n+4) .icon{background:linear-gradient(145deg,rgba(255,215,110,.30),rgba(255,215,110,.10))}
.card:nth-child(8n+5) .icon{background:linear-gradient(145deg,rgba(178,122,255,.30),rgba(178,122,255,.10))}
.card:nth-child(8n+6) .icon{background:linear-gradient(145deg,rgba(255,93,126,.30),rgba(255,93,126,.10))}
.card:nth-child(8n+7) .icon{background:linear-gradient(145deg,rgba(64,210,214,.30),rgba(64,210,214,.10))}
.card:nth-child(8n+8) .icon{background:linear-gradient(145deg,rgba(126,214,255,.30),rgba(126,214,255,.10))}
.card .name{font-size:14px;font-weight:600;color:var(--txt-strong);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0 4px}
.card .name mark{white-space:nowrap}
.card .desc{font-size:12px;color:var(--sub);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0 4px}
.card .cat{position:absolute;top:7px;right:7px;font-size:10px;line-height:1;padding:3px 8px;color:var(--gold-txt);background:var(--cat-bg);border:1px solid var(--cat-brd);border-radius:999px;letter-spacing:1px}
.card .fav{position:absolute;top:7px;left:7px;width:28px;height:28px;border:0;border-radius:50%;background:var(--fav-bg);color:var(--fav-txt);font-size:15px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .12s,color .18s,background .18s}
.card .fav:active{transform:scale(.78)}
.card .fav.on{color:var(--pink);background:rgba(255,93,126,.16);animation:heartPop .32s cubic-bezier(.2,1.6,.4,1)}

/* ---------- 最近在玩：横向滚动条 ---------- */
.hscroll{display:flex;gap:10px;overflow-x:auto;padding:2px 2px 12px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;scrollbar-width:thin;scrollbar-color:var(--orange) var(--scroll-track)}
.hscroll::-webkit-scrollbar{height:6px}
.hscroll::-webkit-scrollbar-track{background:var(--scroll-track);border-radius:3px}
.hscroll::-webkit-scrollbar-thumb{background:linear-gradient(90deg,var(--orange2),var(--orange));border-radius:3px}
.hscroll .card{flex:0 0 138px;scroll-snap-align:start}
.hscroll .empty{flex:1}

/* ---------- 空状态（插画化） ---------- */
.empty{grid-column:1/-1;text-align:center;padding:30px 16px}
.empty .e-ico{font-size:52px;line-height:1;margin-bottom:14px;filter:drop-shadow(0 8px 20px rgba(0,0,0,.25));animation:zPop .45s cubic-bezier(.2,1.4,.4,1)}
.empty .e-txt{font-size:15px;font-weight:600;color:var(--txt)}
.empty .e-sub{font-size:12px;color:var(--faint);font-weight:400;margin-top:7px}
.big-empty{text-align:center;padding:70px 20px;color:var(--sub)}
.big-empty .big-icon{font-size:64px;line-height:1;margin-bottom:16px;filter:drop-shadow(0 10px 24px rgba(0,0,0,.3));animation:zPop .5s cubic-bezier(.2,1.4,.4,1)}
.big-empty p{font-size:16px;color:var(--txt-strong);font-weight:700}
.big-empty .sub{font-size:13px;color:var(--faint);font-weight:400;margin-top:8px}

/* ---------- 骨架屏（清单加载期替代转圈，shimmer 微光扫过） ---------- */
.skel-card{border-radius:var(--radius);border:1px solid var(--brd);background:linear-gradient(165deg,var(--card-hi),var(--card-lo) 70%);padding:14px 8px 16px;text-align:center}
.sk-ico{width:64px;height:64px;margin:0 auto;border-radius:18px;background:var(--sk1)}
.sk-line{height:12px;border-radius:6px;margin:12px auto 0;max-width:82%;background:var(--sk1)}
.sk-line.sk-short{max-width:52%}
@media(prefers-reduced-motion:no-preference){
  .skel-card .sk-ico,.skel-card .sk-line{background:linear-gradient(100deg,var(--sk1) 40%,var(--sk2) 50%,var(--sk1) 60%);background-size:200% 100%;animation:shimmer 1.2s linear infinite}
}
.skel-tip{text-align:center;color:var(--faint);font-size:12px;letter-spacing:1px;padding-top:14px}

/* ---------- 加载更多 / 到底提示 ---------- */
.load-more{text-align:center;padding:8px 0 calc(20px + env(safe-area-inset-bottom))}
.load-more-btn{position:relative;border:0;border-radius:999px;padding:11px 40px;font-size:14px;font-weight:600;letter-spacing:2px;cursor:pointer;touch-action:manipulation;
  background:linear-gradient(135deg,var(--orange2),var(--orange));color:#fff;
  box-shadow:0 5px 16px rgba(255,122,69,.38);transition:transform .14s,box-shadow .14s,filter .14s}
.load-more-btn:hover{filter:brightness(1.06)}
.load-more-btn:active{transform:scale(.95);box-shadow:0 2px 8px rgba(255,122,69,.38)}
.load-more-btn[hidden]{display:none}
.load-more-btn:disabled{cursor:default}
.load-more-btn.loading{pointer-events:none;color:transparent}
.load-more-btn.loading::after{content:"";position:absolute;left:50%;top:50%;width:16px;height:16px;margin:-9px 0 0 -9px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
.end-tip{color:var(--faint);font-size:12px;padding:10px 0 2px;letter-spacing:1px}
.end-tip::before,.end-tip::after{content:"·";color:rgba(255,140,60,.55);margin:0 8px}

/* ---------- 回到顶部悬浮按钮 ---------- */
.back-top{position:fixed;right:14px;bottom:calc(84px + env(safe-area-inset-bottom));z-index:60;width:46px;height:46px;border-radius:50%;
  border:1px solid rgba(255,255,255,.22);background:linear-gradient(135deg,var(--orange2),var(--orange));color:#fff;font-size:20px;line-height:1;cursor:pointer;
  display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(255,122,69,.5);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);transition:transform .15s;animation:zPop .3s cubic-bezier(.2,1.4,.4,1)}
.back-top:active{transform:scale(.86)}

/* ---------- 页脚 ---------- */
footer{text-align:center;color:var(--faint);font-size:12px;padding:10px 16px calc(26px + env(safe-area-inset-bottom));letter-spacing:.5px}

/* ---------- 页内游玩弹窗：全屏 iframe + 顶部工具条（ESC / ←关闭 均可退出） ---------- */
.play-modal{position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;background:var(--overlay);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);overscroll-behavior:contain;
  animation:pmIn .18s ease}
.pm-bar{flex:0 0 auto;display:flex;align-items:center;gap:10px;padding:calc(6px + env(safe-area-inset-top)) 10px 6px;
  background:var(--pm-bar);border-bottom:1px solid var(--brd);box-shadow:0 4px 14px rgba(0,0,0,.18)}
.pm-title{flex:1;min-width:0;font-size:14px;font-weight:700;color:var(--txt-strong);text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.5px}
.pm-btn{flex:0 0 auto;border:1px solid var(--chip-brd);background:var(--chip-bg);color:var(--chip-txt);border-radius:999px;padding:7px 14px;font-size:13px;font-weight:600;cursor:pointer;touch-action:manipulation;white-space:nowrap;transition:transform .12s,background .15s}
.pm-btn:hover{background:var(--chip-hover)}
.pm-btn:active{transform:scale(.93)}
.pm-body{flex:1;position:relative;min-height:0;background:#000}
.pm-frame{position:absolute;inset:0;width:100%;height:100%;border:0;background:#000}

/* ---------- 区块进入视口淡入（IO 加 .in，一次即可；无 IO / 减动效时默认可见） ---------- */
.rv{opacity:0;transform:translateY(16px);transition:opacity .45s ease,transform .45s ease}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}}

/* ---------- 动画 ---------- */
@keyframes zPop{from{opacity:0;transform:scale(.55)}to{opacity:1;transform:scale(1)}}
@keyframes cardIn{from{opacity:0;transform:translateY(16px) scale(.9)}to{opacity:1;transform:none}}
@keyframes heartPop{0%{transform:scale(.5)}55%{transform:scale(1.4)}100%{transform:scale(1)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes shimmer{to{background-position:-200% 0}}
@keyframes pmIn{from{opacity:0}to{opacity:1}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}