:root{
  --bg-top:#f8f4e8;--bg-bottom:#dff0ea;--panel:rgba(255,255,255,.88);--line:rgba(53,76,66,.12);--text:#25332d;--muted:#66756e;--brand:#1f9d74;--brand-deep:#197658;--accent:#ffb54d;--danger:#e8735b;--danger-soft:#fff0ec;--ok-soft:#eefaf5;--shadow:0 22px 54px rgba(47,69,60,.12)
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Segoe UI",sans-serif;background:radial-gradient(circle at 12% 0%,rgba(255,255,255,.72),transparent 26%),radial-gradient(circle at 88% 12%,rgba(255,230,178,.4),transparent 22%),linear-gradient(180deg,var(--bg-top),var(--bg-bottom))}
.page{width:min(1220px,calc(100% - 24px));margin:18px auto 32px}
.hero,.panel{background:var(--panel);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}
.hero{padding:28px;overflow:hidden;position:relative;background:radial-gradient(circle at right top,rgba(201,242,223,.7),transparent 32%),radial-gradient(circle at left bottom,rgba(255,226,175,.34),transparent 26%),linear-gradient(145deg,rgba(255,253,247,.98),rgba(241,250,246,.9))}
.hero:before,.hero:after{content:"";position:absolute;border-radius:999px;pointer-events:none}
.hero:before{width:220px;height:220px;right:-70px;top:-84px;background:radial-gradient(circle,rgba(255,194,79,.24),transparent 70%)}
.hero:after{width:190px;height:190px;left:-50px;bottom:-80px;background:radial-gradient(circle,rgba(65,180,132,.18),transparent 68%)}
.hero-top,.section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;position:relative;z-index:1}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;font-weight:800}
.eyebrow{color:var(--brand-deep);background:rgba(31,157,116,.12)}
.badge{color:var(--brand-deep);background:rgba(255,255,255,.82);border:1px solid rgba(31,157,116,.12)}
h1{margin:16px 0 10px;font-size:clamp(2rem,4vw,4rem);line-height:1.04;letter-spacing:.02em}
.subtitle{margin:0;max-width:760px;color:var(--muted);font-size:clamp(1rem,1.9vw,1.18rem);line-height:1.75}
.hero-stats{margin-top:22px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;position:relative;z-index:1}
.stat{padding:16px;border-radius:20px;background:rgba(255,255,255,.72);border:1px solid rgba(53,76,66,.08)}
.stat-label{font-size:.92rem;color:var(--muted)}
.stat-value{margin-top:8px;font-size:1.55rem;font-weight:900}
.layout{display:grid;grid-template-columns:380px minmax(0,1fr);gap:18px;margin-top:18px}
.panel{padding:20px}
.controls{display:grid;gap:16px}
.group{padding:16px;border-radius:20px;background:rgba(255,255,255,.58);border:1px solid rgba(53,76,66,.08)}
.group h2,.group h3,.panel h2{margin:0;font-size:1.12rem}
.note{margin:8px 0 0;color:var(--muted);line-height:1.65;font-size:.94rem}
.field{margin-top:14px}
.field label{display:block;margin-bottom:8px;color:var(--muted);font-size:.9rem;font-weight:700}
select,textarea{width:100%;border:1px solid rgba(53,76,66,.14);background:#fffdfa;border-radius:14px;padding:12px 14px;color:var(--text);font-size:.98rem;outline:none}
textarea{min-height:132px;resize:vertical;line-height:1.6}
.chip-row,.action-row,.status-row,.result-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{appearance:none;border:1px solid rgba(53,76,66,.12);background:rgba(255,255,255,.8);color:var(--text);padding:10px 14px;border-radius:999px;font-weight:800;cursor:pointer;transition:all .18s ease}
.chip.active{background:rgba(31,157,116,.14);border-color:rgba(31,157,116,.26);color:var(--brand-deep)}
.mode-chip{flex:1 1 150px;display:flex;flex-direction:column;gap:3px;align-items:flex-start;text-align:left;padding:13px 15px;border-radius:18px;border:2px solid rgba(53,76,66,.12);background:rgba(255,255,255,.82);cursor:pointer;transition:all .18s ease;box-shadow:0 8px 18px rgba(56,83,73,.06)}
.mode-chip:hover{transform:translateY(-1px)}
.mode-chip.active{border-color:rgba(31,157,116,.5);background:rgba(31,157,116,.12)}
.mode-chip.battle.active{border-color:rgba(232,115,91,.55);background:linear-gradient(135deg,rgba(232,115,91,.16),rgba(74,158,245,.16))}
.mode-emoji{font-size:1.35rem;line-height:1}
.mode-name{font-weight:900;font-size:1.05rem}
.mode-desc{font-size:.82rem;color:var(--muted);line-height:1.45}
button{appearance:none;border:none;cursor:pointer;font-weight:800;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
button:hover{transform:translateY(-1px)}
.primary,.secondary,.ghost{padding:13px 18px;border-radius:16px;font-size:.98rem}
.primary{color:#fff;background:linear-gradient(135deg,var(--brand),#3cbf90);box-shadow:0 16px 30px rgba(31,157,116,.26)}
.secondary{color:var(--text);background:rgba(255,255,255,.88);border:1px solid rgba(53,76,66,.12)}
.ghost{color:#ae4d3d;background:var(--danger-soft);border:1px solid rgba(232,115,91,.18)}
.play-area{display:grid;gap:16px}
.topbar{padding:18px;border-radius:22px;background:linear-gradient(135deg,rgba(255,255,255,.94),rgba(240,249,244,.9));border:1px solid rgba(53,76,66,.08)}
.status-row{margin-top:14px}
.status-card,.result-card{flex:1 1 110px;min-width:110px;padding:14px 16px;border-radius:18px;background:rgba(255,255,255,.8);border:1px solid rgba(53,76,66,.08)}
.status-title,.result-title{color:var(--muted);font-size:.88rem}
.status-value,.result-value{margin-top:7px;font-size:1.35rem;font-weight:900}
.battle-scoreboard{display:flex;gap:12px;align-items:stretch;margin-top:14px}
.battle-scoreboard.hidden{display:none}
.team-card{flex:1;padding:14px 16px;border-radius:18px;border:2px solid transparent;text-align:center;background:rgba(255,255,255,.82);transition:transform .2s ease,box-shadow .2s ease}
.team-red{background:linear-gradient(135deg,rgba(232,115,91,.16),rgba(255,240,236,.92));border-color:rgba(232,115,91,.34)}
.team-blue{background:linear-gradient(135deg,rgba(74,158,245,.16),rgba(236,244,255,.92));border-color:rgba(74,158,245,.34)}
.team-card.active{box-shadow:0 0 0 3px rgba(31,157,116,.45),0 16px 30px rgba(56,83,73,.12);transform:translateY(-2px)}
.team-name{font-weight:900;font-size:1.05rem}
.team-score{margin-top:6px;font-size:1.9rem;font-weight:900;font-variant-numeric:tabular-nums}
.team-sub{margin-top:4px;color:var(--muted);font-size:.85rem}
.battle-center{flex:1.1;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;padding:10px;border-radius:18px;background:rgba(255,255,255,.7)}
.battle-turn{font-weight:900;font-size:1.05rem}
.battle-timer{font-size:1.7rem;font-weight:900;font-variant-numeric:tabular-nums}
.battle-progress{color:var(--muted);font-size:.85rem}
@media (max-width:720px){.battle-scoreboard{flex-wrap:wrap}.team-card{flex:1 1 42%}.battle-center{flex:1 1 100%;order:-1;flex-direction:row;gap:16px}}
.message{margin-top:16px;padding:16px 18px;border-radius:18px;line-height:1.7;background:linear-gradient(180deg,var(--ok-soft),rgba(255,255,255,.78));border:1px solid rgba(31,157,116,.12)}
.board-shell{position:relative;padding:18px;border-radius:24px;background:radial-gradient(circle at 12% 10%,rgba(255,223,155,.24),transparent 16%),radial-gradient(circle at 88% 14%,rgba(86,194,151,.18),transparent 18%),linear-gradient(180deg,rgba(255,255,255,.86),rgba(248,252,250,.9));border:1px solid rgba(53,76,66,.08);min-height:560px}
.board{display:grid;gap:12px}
.board.size-8{grid-template-columns:repeat(4,minmax(0,1fr))}
.board.size-10{grid-template-columns:repeat(5,minmax(0,1fr))}
.board.size-12{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{position:relative;min-height:118px;background:transparent;padding:0;perspective:1000px}
.card-inner{position:relative;width:100%;height:100%;min-height:118px;transform-style:preserve-3d;transition:transform .42s ease,opacity .28s ease}
.card.flipped .card-inner{transform:rotateY(180deg)}
.card.matched .card-inner{transform:rotateY(180deg) scale(.96);opacity:.22}
.card-face{position:absolute;inset:0;border-radius:22px;backface-visibility:hidden;border:1px solid rgba(53,76,66,.1);box-shadow:0 14px 28px rgba(56,83,73,.08);display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:14px}
.card-front{background:linear-gradient(160deg,#fffaf0,#fff)}
.card-front:before{content:"词";display:grid;place-items:center;width:52px;height:52px;border-radius:18px;margin-bottom:10px;font-size:1.2rem;font-weight:900;color:#fff;background:linear-gradient(135deg,var(--brand),#52d0a0);box-shadow:0 12px 24px rgba(31,157,116,.24)}
.card-back{transform:rotateY(180deg);color:var(--text);background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(248,252,249,.98))}
.card-back.word{background:linear-gradient(180deg,#fff9e8,#fffdf7)}
.card-back.meaning{background:linear-gradient(180deg,#eef9f4,#fbfffd)}
.type-tag{display:inline-flex;align-items:center;justify-content:center;min-width:62px;padding:6px 10px;border-radius:999px;font-size:.75rem;font-weight:800;letter-spacing:.04em}
.word .type-tag{background:rgba(255,181,77,.18);color:#9f6505}
.meaning .type-tag{background:rgba(31,157,116,.14);color:var(--brand-deep)}
.card-text{margin-top:10px;font-size:clamp(1rem,1.8vw,1.3rem);font-weight:900;line-height:1.35}
.card-sub{margin-top:8px;color:var(--muted);font-size:.9rem}
.board-overlay{position:absolute;inset:18px;border-radius:22px;display:none;align-items:center;justify-content:center;background:rgba(250,252,251,.84);border:1px dashed rgba(53,76,66,.12);text-align:center;padding:24px}
.board-overlay.show{display:flex}
.empty-state{max-width:520px}
.empty-state h3{margin:0;font-size:1.4rem}
.empty-state p{margin:10px 0 0;line-height:1.75;color:var(--muted)}
.battle-arena{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.battle-arena.hidden{display:none}
.team-board{padding:14px;border-radius:22px;border:2px solid transparent;background:rgba(255,255,255,.5)}
.team-board-red{background:linear-gradient(160deg,rgba(232,115,91,.12),rgba(255,255,255,.55));border-color:rgba(232,115,91,.32)}
.team-board-blue{background:linear-gradient(160deg,rgba(74,158,245,.12),rgba(255,255,255,.55));border-color:rgba(74,158,245,.32)}
.team-board-head{display:flex;align-items:center;justify-content:center;gap:8px;font-weight:900;font-size:1.2rem;margin-bottom:12px}
.team-board .board{grid-template-columns:repeat(4,minmax(0,1fr))!important}
.team-board.success-flash{animation:popFlash .42s ease}
.team-board.fail-flash{animation:shake .28s ease}
.hidden{display:none!important}
@media (max-width:720px){.battle-arena{grid-template-columns:1fr}.team-board .board{grid-template-columns:repeat(2,minmax(0,1fr))!important}}
.results{padding:18px;border-radius:22px;background:linear-gradient(180deg,rgba(255,255,255,.88),rgba(248,252,250,.94));border:1px solid rgba(53,76,66,.08)}
.results.hidden{display:none}
.tips{margin-top:16px;padding:16px;border-radius:18px;background:rgba(255,255,255,.72);border:1px solid rgba(53,76,66,.08);color:var(--muted);line-height:1.7}
.helper{margin-top:8px;color:var(--muted);font-size:.88rem}
.success-flash{animation:popFlash .42s ease}
.fail-flash{animation:shake .28s ease}
@keyframes popFlash{0%{transform:scale(1)}50%{transform:scale(1.04)}100%{transform:scale(1)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-3px)}75%{transform:translateX(3px)}}
@media (max-width:1080px){.layout{grid-template-columns:1fr}.hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:720px){.page{width:min(100% - 16px,1220px)}.hero,.panel{padding:16px}.hero-stats{grid-template-columns:1fr 1fr}.board.size-8,.board.size-10,.board.size-12{grid-template-columns:repeat(2,minmax(0,1fr))}.board-shell{min-height:440px;padding:14px}.board-overlay{inset:14px}.card,.card-inner{min-height:104px}}
.site-nav{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.06);padding:0 24px;position:sticky;top:0;z-index:200}
.site-nav-inner{max-width:1220px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:56px}
.site-logo{font-family:'Nunito',sans-serif;font-size:22px;font-weight:900;color:#E85D8C;text-decoration:none}
.site-logo span{color:#4A9EF5}
.site-nav-links{display:flex;gap:24px;list-style:none}
.site-nav-links a{text-decoration:none;color:#A0A0B8;font-weight:700;font-size:14px;transition:color .2s}
.site-nav-links a:hover{color:#8B5CF6}
.site-footer{background:#fff;border-top:1px solid rgba(53,76,66,.08);padding:24px;text-align:center;color:#66756e;font-size:13px;font-weight:700;margin-top:32px}
.site-footer a{color:#1f9d74;text-decoration:none}
@media(max-width:600px){.site-nav-links{display:none}}