/* ===================== 基础 ===================== */
:root{
  --bg:#0A0C12;
  --ink:#F2EFE8;
  --dim:#9AA0AE;
  --dim2:#666C7C;
  --line:rgba(244,239,230,.09);
  --line2:rgba(244,239,230,.16);
  --panel:rgba(244,239,230,.045);
  --violet:#9D8CFF;
  --cyan:#7FD3DE;
  --pink:#FF5D73;
  --lime:#B7D98A;
  --amber:#E8C07A;
  --r:14px;
  --font:"Inter","SF Pro Display",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  background:var(--bg);color:var(--ink);font-family:var(--font);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
#cam{position:fixed;left:0;top:0;width:2px;height:2px;opacity:0;pointer-events:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
b{font-variant-numeric:tabular-nums}

#app{position:fixed;inset:0;overflow:hidden}

/* ===================== 背景光晕 ===================== */
.aurora{position:absolute;inset:0;overflow:hidden;z-index:0;background:
  radial-gradient(120% 90% at 50% -20%, #131a3d 0%, #080a1c 45%, #04050c 100%);}
.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;mix-blend-mode:screen;animation:float 22s ease-in-out infinite}
.b1{width:52vw;height:52vw;left:-12vw;top:-16vw;background:radial-gradient(circle at 35% 35%,rgba(124,92,255,.85),rgba(124,92,255,0) 65%)}
.b2{width:46vw;height:46vw;right:-10vw;top:-6vw;background:radial-gradient(circle at 60% 40%,rgba(37,224,240,.55),rgba(37,224,240,0) 65%);animation-delay:-7s}
.b3{width:60vw;height:40vw;left:22vw;bottom:-24vw;background:radial-gradient(circle at 50% 50%,rgba(255,93,143,.42),rgba(255,93,143,0) 65%);animation-delay:-13s}
@keyframes float{
  0%,100%{transform:translate3d(0,0,0) scale(1)}
  33%{transform:translate3d(4vw,3vw,0) scale(1.08)}
  66%{transform:translate3d(-3vw,2vw,0) scale(.95)}
}
.grain{position:absolute;inset:0;opacity:.05;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E")}

/* ===================== 屏幕 ===================== */
.screen{position:absolute;inset:0;z-index:2;display:none;overflow-y:auto;overflow-x:hidden}
.screen.is-active{display:block}
.screen#screen-game{overflow:hidden}

/* ===================== 顶栏 ===================== */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:26px clamp(20px,4vw,58px) 8px;
}
.brand{display:flex;align-items:center;gap:14px}
.brand-mark{position:relative;width:44px;height:44px;border-radius:14px;
  background:linear-gradient(140deg,rgba(124,92,255,.95),rgba(37,224,240,.75));
  box-shadow:0 8px 30px rgba(124,92,255,.45),inset 0 1px 0 rgba(255,255,255,.5);
  display:grid;place-items:center}
.brand-mark i{position:absolute;background:#fff;border-radius:2px;opacity:.95}
.brand-mark i:nth-child(1){width:3px;height:16px;left:16px;top:12px}
.brand-mark i:nth-child(2){width:3px;height:20px;left:21px;top:10px}
.brand-mark i:nth-child(3){width:3px;height:13px;left:26px;top:15px;opacity:.7}
.brand-txt h1{font-size:19px;font-weight:800;letter-spacing:.14em;line-height:1.1}
.brand-txt h1 span{color:var(--dim);font-weight:500;margin-left:6px;letter-spacing:.24em;font-size:13px}
.brand-txt p{font-size:11.5px;color:var(--dim2);letter-spacing:.18em;margin-top:4px}
.topbar-right{display:flex;align-items:center;gap:10px}
.chip{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:99px;
  background:var(--panel);border:1px solid var(--line);font-size:12.5px;color:var(--dim);
  backdrop-filter:blur(12px);transition:.3s}
.chip .dot{width:7px;height:7px;border-radius:50%;background:#ff5d6c;box-shadow:0 0 10px #ff5d6c}
.chip.ok{color:#bdf7c8;border-color:rgba(120,255,160,.28);background:rgba(80,255,150,.08)}
.chip.ok .dot{background:#5dff9b;box-shadow:0 0 10px #5dff9b}
.chip.warn{color:#ffe0a3;border-color:rgba(255,196,77,.3)}
.chip.warn .dot{background:var(--amber);box-shadow:0 0 10px var(--amber)}
.ghost-btn{padding:10px 18px;border-radius:99px;border:1px solid var(--line2);
  font-size:13px;color:var(--ink);background:rgba(255,255,255,.03);transition:.22s;backdrop-filter:blur(10px)}
.ghost-btn:hover{background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.3);transform:translateY(-1px)}
.primary-btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 26px;border-radius:99px;font-size:14.5px;font-weight:650;color:#0a0b16;
  background:linear-gradient(120deg,#c9d2ff,#8ff5ff 45%,#b9a6ff);
  box-shadow:0 12px 36px rgba(124,92,255,.35),inset 0 1px 0 #fff;
  transition:.22s;letter-spacing:.02em}
.primary-btn:hover{transform:translateY(-2px);box-shadow:0 18px 44px rgba(124,92,255,.5),inset 0 1px 0 #fff}
.primary-btn:active{transform:translateY(0)}
.pb-icon{font-size:16px;opacity:.75}

/* ===================== 首页布局 ===================== */
.home-grid{
  display:grid;grid-template-columns:1fr minmax(300px,380px);gap:clamp(18px,3vw,40px);
  padding:clamp(14px,3.2vh,44px) clamp(20px,4vw,58px) 8px;align-items:center;
}
.hero-tag{display:inline-block;padding:6px 13px;border-radius:99px;font-size:11.5px;letter-spacing:.16em;
  color:#cfd6ff;border:1px solid rgba(150,160,255,.28);background:rgba(124,92,255,.12);margin-bottom:18px}
.hero-title{font-size:clamp(34px,4.9vw,66px);line-height:1.02;font-weight:800;letter-spacing:-.02em;
  background:linear-gradient(170deg,#fff 20%,#b9c2ff 60%,#7f8ad0 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 20px 60px rgba(124,92,255,.25)}
.hero-desc{margin-top:16px;max-width:520px;font-size:14px;line-height:1.85;color:var(--dim)}
.hero-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.hero-meta{display:flex;gap:34px;margin-top:26px}
.hero-meta div{display:flex;flex-direction:column;gap:6px}
.hero-meta b{font-size:22px;font-weight:700;letter-spacing:-.01em;
  background:linear-gradient(180deg,#fff,#9aa4d8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-meta span{font-size:11px;color:var(--dim2);letter-spacing:.14em}

/* 镜面卡片 */
.mirror-card{border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  padding:14px;backdrop-filter:blur(18px);box-shadow:0 24px 70px rgba(0,0,0,.45)}
.mirror-head{display:flex;justify-content:space-between;align-items:center;padding:2px 6px 12px;font-size:12px;color:var(--dim);letter-spacing:.1em}
.mirror-head em{font-style:normal;color:var(--dim2);font-size:11px}
.mirror-stage{position:relative;border-radius:16px;overflow:hidden;background:#080a18;aspect-ratio:4/3}
.mirror-stage canvas{width:100%;height:100%;display:block}
.mirror-empty{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:10px;text-align:center;
  color:var(--dim2);font-size:12px;line-height:1.8;transition:.4s}
.mirror-empty .me-icon{font-size:30px;opacity:.5;animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.3;transform:scale(1)}50%{opacity:.7;transform:scale(1.08)}}
.mirror-empty.hide{opacity:0;pointer-events:none}
.mirror-tips{list-style:none;display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;padding:0 4px}
.mirror-tips li{font-size:11px;color:var(--dim2);padding:5px 10px;border-radius:99px;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.mirror-tips b{color:#c8cfff;font-weight:600}

/* ===================== 游戏卡片 ===================== */
.section-title{display:flex;align-items:baseline;gap:14px;padding:clamp(14px,3vh,30px) clamp(20px,4vw,58px) 14px}
.section-title h3{font-size:15px;letter-spacing:.16em;font-weight:700}
.section-title span{font-size:11.5px;color:var(--dim2);letter-spacing:.1em}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(206px,1fr));gap:14px;
  padding:0 clamp(20px,4vw,58px) 22px}
.card{
  position:relative;border-radius:20px;overflow:hidden;cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.035);
  transition:transform .28s cubic-bezier(.2,.8,.3,1),border-color .28s,box-shadow .28s;
  min-height:178px;display:flex;flex-direction:column;justify-content:flex-end;
  padding:15px;text-align:left;width:100%;
}
.card:hover{transform:translateY(-6px);border-color:rgba(255,255,255,.24);box-shadow:0 26px 60px rgba(0,0,0,.55)}
.card .halo{position:absolute;inset:-40% -20% auto -20%;height:120%;
  background:radial-gradient(circle at 50% 30%,var(--c1),transparent 62%);opacity:.42;transition:.4s}
.card:hover .halo{opacity:.7;transform:scale(1.1)}
.card .art{position:absolute;right:-14px;top:-14px;width:132px;height:132px;opacity:.9;
  transition:transform .5s cubic-bezier(.2,.8,.3,1)}
.card:hover .art{transform:scale(1.08) rotate(-4deg)}
.card .cbody{position:relative;z-index:2}
.card h4{font-size:16.5px;font-weight:700;letter-spacing:.01em;display:flex;align-items:center;gap:8px}
.card h4 em{font-style:normal;font-size:10px;font-weight:600;letter-spacing:.1em;color:#0a0b16;
  background:linear-gradient(120deg,#fff,#c8d2ff);padding:3px 7px;border-radius:6px;opacity:.9}
.card p{font-size:11.8px;color:var(--dim);margin-top:7px;line-height:1.65}
.card .tags{display:flex;gap:6px;margin-top:11px;flex-wrap:wrap}
.card .tags i{font-style:normal;font-size:10.5px;padding:4px 8px;border-radius:99px;
  border:1px solid var(--line2);color:#c3cbf0;background:rgba(255,255,255,.04)}
.card .best{position:absolute;top:14px;left:16px;font-size:10px;letter-spacing:.1em;color:var(--dim2);z-index:2}
.card .best b{color:#dfe4ff;font-weight:700;font-size:11px}

/* ===================== 页脚 ===================== */
.foot{display:flex;gap:22px;flex-wrap:wrap;padding:0 clamp(20px,4vw,58px) 34px;
  font-size:10.5px;color:var(--dim2);letter-spacing:.12em}

/* ===================== 游戏画布 ===================== */
#stage{position:absolute;inset:0;width:100%;height:100%;display:block;z-index:1}
.vignette{position:absolute;inset:0;z-index:2;pointer-events:none;
  background:radial-gradient(120% 100% at 50% 50%,transparent 42%,rgba(3,4,10,.55) 100%)}

/* ===================== HUD ===================== */
.hud{position:absolute;left:0;right:0;top:0;z-index:6;display:flex;align-items:flex-start;
  justify-content:space-between;gap:18px;padding:20px clamp(16px,3vw,38px);pointer-events:none}
.hud-side{display:flex;align-items:center;gap:14px;pointer-events:auto}
.hud-side.right{justify-content:flex-end}
.icon-btn{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;font-size:15px;
  border:1px solid var(--line2);background:rgba(10,12,24,.5);color:#dfe4ff;backdrop-filter:blur(14px);transition:.2s}
.icon-btn:hover{background:rgba(255,255,255,.14);transform:translateY(-1px)}
.stat{display:flex;flex-direction:column;gap:2px;padding:8px 16px;border-radius:14px;
  border:1px solid var(--line);background:rgba(8,10,22,.42);backdrop-filter:blur(14px);min-width:78px}
.stat span{font-size:9.5px;letter-spacing:.16em;color:var(--dim2)}
.stat b{font-size:21px;font-weight:750;line-height:1.15;letter-spacing:-.01em}
.stat.mini b{font-size:17px}
.stat.combo{opacity:0;transform:translateY(-6px) scale(.94);transition:.25s}
.stat.combo.on{opacity:1;transform:none}
.stat.combo b{color:var(--amber)}
.hud-center{display:flex;flex-direction:column;align-items:center;gap:8px;min-width:130px}
.timer{font-size:34px;font-weight:800;letter-spacing:-.02em;line-height:1;
  text-shadow:0 6px 30px rgba(124,92,255,.6);font-variant-numeric:tabular-nums}
.timer.warn{color:#ff7d90;text-shadow:0 6px 30px rgba(255,93,143,.7)}
.timer-track{width:132px;height:4px;border-radius:99px;background:rgba(255,255,255,.13);overflow:hidden}
.timer-track i{display:block;height:100%;width:100%;border-radius:99px;
  background:linear-gradient(90deg,#25e0f0,#7c5cff 60%,#ff5d8f);transition:width .2s linear}
.goal{font-size:10.5px;letter-spacing:.14em;color:var(--dim2)}

/* 大字提示 */
.prompt{position:absolute;left:50%;top:22%;transform:translate(-50%,-50%) scale(.9);z-index:7;
  font-size:clamp(28px,5vw,58px);font-weight:850;letter-spacing:.02em;text-align:center;
  opacity:0;transition:.18s;pointer-events:none;white-space:nowrap;
  text-shadow:0 0 40px rgba(124,92,255,.8),0 8px 40px rgba(0,0,0,.6)}
.prompt.on{opacity:1;transform:translate(-50%,-50%) scale(1)}
.prompt.good{color:#b8ffd0;text-shadow:0 0 46px rgba(93,255,155,.85)}
.prompt.hot{color:#ffd9a3;text-shadow:0 0 46px rgba(255,180,77,.9)}

/* 底部小贴士 */
.tips{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:6;
  display:flex;gap:10px;align-items:center;padding:9px 18px;border-radius:99px;
  font-size:12px;color:#c6cdf0;background:rgba(8,10,22,.5);border:1px solid var(--line);
  backdrop-filter:blur(14px);white-space:nowrap;max-width:94vw;overflow:hidden}
.tips i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);flex:none}

/* 倒计时 */
.countdown{position:absolute;inset:0;z-index:9;display:none;place-items:center;pointer-events:none;
  background:radial-gradient(circle at 50% 50%,rgba(10,12,26,.55),rgba(4,5,12,.86))}
.countdown.on{display:grid}
.countdown.loading span{font-size:clamp(48px,8vw,84px);animation:spin 1.4s linear infinite;opacity:.85}
@keyframes spin{to{transform:rotate(360deg)}}
.countdown span{font-size:clamp(90px,17vw,190px);font-weight:850;line-height:1;letter-spacing:-.04em;
  background:linear-gradient(180deg,#fff,#8ea0ff);-webkit-background-clip:text;background-clip:text;color:transparent;
  animation:cdPop .85s cubic-bezier(.2,.9,.3,1)}
@keyframes cdPop{0%{transform:scale(.4);opacity:0;filter:blur(8px)}45%{transform:scale(1.06);opacity:1;filter:blur(0)}100%{transform:scale(1);opacity:.92}}

/* 暂停 */
.pause-panel{position:absolute;inset:0;z-index:10;display:none;place-items:center;
  background:rgba(4,5,12,.72);backdrop-filter:blur(18px)}
.pause-panel.on{display:grid}
.pp-card{display:grid;gap:14px;justify-items:center;padding:34px 44px;border-radius:24px;
  border:1px solid var(--line2);background:rgba(255,255,255,.05);text-align:center}
.pp-card h4{font-size:20px;letter-spacing:.06em}
.pp-card p{font-size:12.5px;color:var(--dim)}

/* 摄像头错误 */
.cam-error{position:absolute;inset:0;z-index:11;display:none;place-items:center;
  background:rgba(4,5,12,.8);backdrop-filter:blur(16px)}
.cam-error.on{display:grid}
.ce-card{display:grid;gap:12px;justify-items:center;padding:32px 40px;border-radius:24px;max-width:420px;
  border:1px solid var(--line2);background:rgba(255,255,255,.05);text-align:center}
.ce-card h4{font-size:19px}
.ce-card p{font-size:12.5px;color:var(--dim);line-height:1.8}

/* ===================== 结算 ===================== */
#screen-result{display:none;place-items:center}
#screen-result.is-active{display:grid}
.result-card{width:min(560px,92vw);padding:44px 44px 34px;border-radius:28px;text-align:center;
  border:1px solid var(--line2);background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.025));
  backdrop-filter:blur(24px);box-shadow:0 40px 120px rgba(0,0,0,.6);
  animation:cardIn .5s cubic-bezier(.2,.9,.3,1)}
@keyframes cardIn{from{opacity:0;transform:translateY(24px) scale(.97)}to{opacity:1;transform:none}}
.res-stars{font-size:26px;letter-spacing:8px;color:var(--amber);text-shadow:0 0 24px rgba(255,196,77,.7);margin-bottom:12px;height:32px}
.res-new{display:none;width:fit-content;margin:0 auto 12px;padding:5px 15px;border-radius:99px;
  font-size:10.5px;letter-spacing:.2em;font-weight:700;color:#0a0b16;
  background:linear-gradient(120deg,#fff3c9,#ffc44d);box-shadow:0 8px 26px rgba(255,196,77,.4)}
.res-new.on{display:block;animation:cardIn .5s .15s both}
.result-card h2{font-size:27px;font-weight:800;letter-spacing:.01em}
.res-sub{font-size:12.5px;color:var(--dim);margin-top:10px}
.res-score{display:flex;align-items:baseline;justify-content:center;gap:8px;margin:26px 0 6px}
.res-score b{font-size:76px;font-weight:850;letter-spacing:-.04em;line-height:1;
  background:linear-gradient(180deg,#fff,#9aa8ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.res-score span{font-size:14px;color:var(--dim2);letter-spacing:.2em}
.res-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:26px 0 28px}
.res-grid div{padding:14px 8px;border-radius:16px;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.res-grid b{display:block;font-size:19px;font-weight:750}
.res-grid span{font-size:10px;color:var(--dim2);letter-spacing:.12em}
.res-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ===================== 弹层 ===================== */
.modal{position:absolute;inset:0;z-index:20;display:none;place-items:center;
  background:rgba(3,4,10,.7);backdrop-filter:blur(14px)}
.modal.on{display:grid}
.modal-card{width:min(540px,92vw);padding:34px 36px;border-radius:26px;border:1px solid var(--line2);
  background:rgba(16,18,34,.9);box-shadow:0 40px 120px rgba(0,0,0,.6)}
.modal-card h3{font-size:20px;margin-bottom:18px;letter-spacing:.04em}
.modal-card ol{padding-left:20px;display:grid;gap:12px;font-size:13px;line-height:1.85;color:var(--dim)}
.modal-card ol b{color:var(--ink);font-weight:650}
.modal-note{margin:20px 0 24px;font-size:11.5px;line-height:1.9;color:var(--dim2);
  padding:14px 16px;border-radius:14px;background:rgba(124,92,255,.1);border:1px solid rgba(124,92,255,.2)}

/* ===================== 响应式 ===================== */
@media (max-width:1080px){
  .home-grid{grid-template-columns:1fr;gap:26px}
  .mirror-card{max-width:460px}
  .hero-meta{gap:24px}
}
@media (max-width:640px){
  .topbar{padding-top:18px}
  .brand-txt h1{font-size:16px}
  .brand-txt h1 span{display:none}
  .hero-title{font-size:36px}
  .hero-desc{font-size:13px}
  .cards{grid-template-columns:1fr 1fr;gap:10px}
  .card{min-height:158px;padding:13px}
  .card h4{font-size:14px}
  .card p{font-size:10.5px}
  .card .art{width:96px;height:96px}
  .hud{padding:12px}
  .stat{padding:6px 10px;min-width:62px}
  .stat b{font-size:17px}
  .timer{font-size:26px}
  .timer-track{width:96px}
  .res-grid{grid-template-columns:1fr;gap:8px}
  .res-score b{font-size:58px}
}

/* ============ 性能浮层（?debug=1 开启） ============ */
#dbg{
  position:fixed;left:12px;bottom:12px;z-index:99;
  padding:8px 12px;border-radius:8px;
  background:rgba(5,6,15,.82);border:1px solid rgba(255,255,255,.12);
  color:#cfe0ff;font:12px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;
  pointer-events:none;white-space:pre;backdrop-filter:blur(6px);
}
#dbg b{color:#8ff5ff;font-weight:500}
#dbg i{color:#5f6b95;font-style:normal}