:root{--ink:#30243d;--muted:#766b7d;--paper:#fffaf3;--coral:#ff6b6b;--yellow:#ffc857;--blue:#55b7e9;--mint:#71d6a8;--line:#eadfd5;--shadow:0 24px 60px #55325318}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:"Microsoft YaHei",system-ui,sans-serif;background:linear-gradient(150deg,#fff9ef,#fff3f6 50%,#edf9ff);color:var(--ink)}button,input{font:inherit}.hidden{display:none!important}body{overflow-x:hidden}.sky-decor{position:fixed;border-radius:50%;filter:blur(2px);opacity:.28;pointer-events:none}.sky-decor.one{width:420px;height:420px;right:-160px;top:60px;background:#ffd15c}.sky-decor.two{width:360px;height:360px;left:-160px;bottom:-80px;background:#64c7ee}.topbar{height:76px;padding:0 clamp(18px,5vw,72px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #ffffffaa;background:#fffaf5cc;backdrop-filter:blur(16px);position:relative;z-index:3}.brand{border:0;background:none;color:var(--ink);font-size:20px;font-weight:900;cursor:pointer}.brand span{display:inline-grid;place-items:center;width:38px;height:38px;margin-right:10px;border-radius:14px;background:var(--coral);color:#fff}.user-chip{display:flex;align-items:center;gap:12px;padding:8px 12px;border-radius:999px;background:#fff;box-shadow:0 8px 30px #4b2f4312;font-size:13px}.user-chip button{border:0;background:none;color:var(--coral);cursor:pointer}.page{position:relative;z-index:1;max-width:1320px;margin:auto;padding:clamp(34px,6vw,82px) clamp(16px,5vw,64px)}.screen{min-height:calc(100vh - 160px)}.welcome{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.65fr);gap:clamp(30px,7vw,100px);align-items:center}.eyebrow{font-size:11px;font-weight:900;letter-spacing:.22em;color:var(--coral)}.hero-copy h1{font-size:clamp(52px,8vw,106px);line-height:.98;letter-spacing:-.07em;margin:20px 0;font-weight:950}.hero-copy h1 em{font-style:normal;color:var(--coral)}.hero-copy p{max-width:650px;color:var(--muted);line-height:1.85;font-size:17px}.auth-card{padding:30px;border-radius:30px;background:#fff;box-shadow:var(--shadow);border:1px solid #fff}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;padding:4px;border-radius:14px;background:#f6f0eb}.auth-tabs button{border:0;padding:11px;background:transparent;border-radius:11px;cursor:pointer;color:var(--muted)}.auth-tabs button.active{background:#fff;color:var(--ink);box-shadow:0 5px 15px #56324713;font-weight:800}.auth-form{display:grid;gap:14px;margin-top:22px}.auth-form label{display:grid;gap:7px;font-size:12px;font-weight:800}.auth-form input,.join-panel input,.friend-invite input{width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 14px;background:#fffdf9;outline:none}.auth-form input:focus,.join-panel input:focus,.friend-invite input:focus{border-color:var(--coral);box-shadow:0 0 0 4px #ff6b6b18}.auth-form>button,.join-panel button,.friend-invite button,.primary-btn{border:0;border-radius:13px;padding:14px 18px;background:var(--ink);color:#fff;font-weight:900;cursor:pointer}.section-title{display:flex;justify-content:space-between;align-items:end;gap:20px}.section-title h2{font-size:clamp(40px,6vw,72px);margin:9px 0}.soft-btn,.back-btn{border:0;background:#fff;padding:11px 15px;border-radius:12px;color:var(--muted);cursor:pointer;box-shadow:0 8px 24px #49263f0d}.notice{margin:20px 0;padding:16px 18px;border-radius:16px;background:#fff1c9;border:1px solid #f3d67d}.notice button{margin-left:10px;border:0;border-radius:8px;background:var(--ink);color:#fff;padding:7px 10px}.mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:38px}.mode-card{position:relative;min-height:240px;border:0;border-radius:28px;padding:26px;text-align:left;color:var(--ink);cursor:pointer;transition:.22s;box-shadow:var(--shadow)}.mode-card:hover{transform:translateY(-7px) rotate(-.5deg)}.mode-card.coral{background:#ff8b85}.mode-card.yellow{background:#ffd66d}.mode-card.blue{background:#82cef0}.mode-card span{font-size:12px;font-weight:900;opacity:.6}.mode-card b{display:block;margin-top:72px;font-size:31px}.mode-card small{display:block;margin-top:8px;font-size:13px;opacity:.66}.mode-card i{position:absolute;right:25px;bottom:22px;font-size:28px;font-style:normal}.join-panel{display:flex;max-width:520px;gap:10px;margin-top:22px}.join-panel input{flex:1;text-transform:uppercase;letter-spacing:.25em}.leaderboard-card{display:grid;grid-template-columns:260px 1fr;gap:30px;margin-top:34px;padding:26px;border-radius:24px;background:#fff;box-shadow:var(--shadow)}.leaderboard-card h3{font-size:26px;margin:8px 0}.leaderboard-card ol{display:grid;grid-template-columns:repeat(3,1fr);gap:8px 24px;margin:0;padding-left:25px}.leaderboard-card li{padding:6px;color:var(--muted)}.leaderboard-card li strong{color:var(--ink)}.game{display:grid;grid-template-columns:minmax(290px,.7fr) minmax(480px,1.3fr);gap:clamp(30px,6vw,80px);align-items:center}.game-panel h2{font-size:clamp(42px,5vw,70px);margin:10px 0}.game-panel>p{color:var(--muted);line-height:1.65}.back-btn{margin-bottom:35px}.score-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:24px 0}.score-grid>div,.target-box,.opponent,.room-card{padding:16px;border-radius:16px;background:#fff;box-shadow:0 10px 30px #5933470c}.score-grid span,.target-box span,.opponent span,.room-card span{display:block;font-size:11px;color:var(--muted)}.score-grid strong{display:block;margin-top:5px;font-size:30px}.target-box,.opponent,.room-card{display:flex;align-items:center;justify-content:space-between;margin-top:10px}.target-box strong,.opponent strong{font-size:22px}.room-card strong{letter-spacing:.18em;font-family:monospace;font-size:23px}.room-card button{border:0;background:none;color:var(--coral);cursor:pointer}.friend-invite{display:flex;gap:8px;margin-top:10px}.primary-btn{width:100%;margin-top:16px;background:var(--coral)}.board-shell{position:relative;width:min(100%,720px);padding:18px;border-radius:34px;background:#fff;box-shadow:0 28px 80px #55325325}.board-top{height:42px;display:flex;justify-content:space-between;align-items:center;padding:0 8px;font-weight:900;color:var(--coral)}.match-board{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;aspect-ratio:1;padding:10px;border-radius:24px;background:linear-gradient(145deg,#675073,#3d3048);touch-action:none;user-select:none}.tile{position:relative;border:0;border-radius:22%;cursor:pointer;box-shadow:inset 0 -5px 0 #0002,0 4px 8px #1d13243d;transition:transform .12s,filter .12s}.tile:hover{transform:scale(1.06)}.tile.selected{outline:4px solid #fff;transform:scale(.9);filter:brightness(1.15)}.tile::before{content:"";position:absolute;left:18%;top:12%;width:24%;height:18%;border-radius:50%;background:#fff8;transform:rotate(-25deg)}.tile.t0{background:linear-gradient(145deg,#ff7b74,#e84454);border-radius:50%}.tile.t1{background:linear-gradient(145deg,#ffd84f,#f39b21);border-radius:46% 54% 50% 45%}.tile.t2{background:linear-gradient(145deg,#75dc9e,#35aa78);border-radius:52% 45% 55% 42%}.tile.t3{background:linear-gradient(145deg,#6fd3ff,#3b78dd);border-radius:45%}.tile.t4{background:linear-gradient(145deg,#b994ff,#7854d5);border-radius:50% 50% 44% 56%}.tile.t5{background:linear-gradient(145deg,#ff9bd1,#e44e9d);border-radius:55% 45% 50% 50%}.board-overlay{position:absolute;inset:60px 18px 18px;display:grid;place-content:center;text-align:center;border-radius:24px;background:#30243de8;color:#fff;backdrop-filter:blur(5px);z-index:3}.board-overlay strong{font-size:42px}.board-overlay span{margin-top:8px;color:#e5dae8}.toast{position:fixed;z-index:20;left:50%;bottom:25px;transform:translate(-50%,20px);padding:12px 18px;border-radius:12px;background:var(--ink);color:#fff;opacity:0;transition:.2s;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:900px){.welcome{grid-template-columns:1fr}.hero-copy h1{font-size:66px}.auth-card{max-width:620px}.mode-grid{grid-template-columns:1fr}.mode-card{min-height:170px}.mode-card b{margin-top:35px}.leaderboard-card{grid-template-columns:1fr}.game{grid-template-columns:1fr}.board-shell{order:-1;margin:auto}.game-panel{max-width:720px;margin:auto;width:100%}}
@media(max-width:600px){.topbar{height:64px;padding:0 14px}.brand{font-size:16px}.brand span{width:32px;height:32px}.page{padding:26px 12px}.screen{min-height:auto}.welcome{gap:26px}.hero-copy h1{font-size:48px}.hero-copy p{font-size:14px}.auth-card{padding:20px;border-radius:22px}.section-title{align-items:flex-start;flex-direction:column}.section-title h2{font-size:44px}.mode-grid{margin-top:24px;gap:12px}.mode-card{min-height:145px;border-radius:22px;padding:20px}.mode-card b{font-size:27px;margin-top:28px}.leaderboard-card{padding:20px}.leaderboard-card ol{grid-template-columns:1fr 1fr}.game{gap:24px}.board-shell{width:100%;padding:9px;border-radius:22px}.board-top{height:35px}.match-board{gap:4px;padding:7px;border-radius:17px}.tile{box-shadow:inset 0 -3px 0 #0002,0 2px 5px #1d13243d}.board-overlay{inset:44px 9px 9px}.board-overlay strong{font-size:34px}.game-panel h2{font-size:44px}.back-btn{margin-bottom:25px}.user-chip strong{display:none}}