:root{--ink:#243d35;--muted:#6e7b70;--paper:#fafbf5;--white:#fff;--line:#e1e7d8;--mint:#dcefc4;--green:#426b3e;--deep:#294c3c;--orange:#fae6cd;--gold:#e0ac4c;--radius:18px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{color:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:not-allowed;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #548b57;outline-offset:4px}h1,h2,h3,p{margin:0}h1{font-size:clamp(30px,3.8vw,44px);line-height:1.28;letter-spacing:-1px;font-weight:800}h2{font-size:22px;line-height:1.4}h3{font-size:21px;line-height:1.4}p{line-height:1.8}strong{font-weight:750}.muted{color:var(--muted)}.small{font-size:13px}.center{text-align:center}.icon{width:22px;height:22px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.site-header{border-bottom:1px solid var(--line);background:#fafbf5ed}.header-inner{max-width:1080px;min-height:88px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:12px 32px;gap:16px}.brand{display:flex;align-items:center;gap:12px;font-size:19px;font-weight:800;letter-spacing:.4px;min-height:44px}.brand img{image-rendering:pixelated}.brand span{display:flex;gap:8px;align-items:baseline}.brand small{font-size:13px;font-weight:600;color:var(--muted)}.main{max-width:1080px;margin:auto;padding:0 32px 36px;min-height:calc(100svh - 166px)}.main-nav{display:flex;align-items:center;gap:12px;padding:22px 0 26px;flex-wrap:wrap}.nav-btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:9px 17px;border:0;border-radius:10px;background:transparent;color:var(--muted);font-size:14px;font-weight:650}.nav-btn.active{background:#e7eddf;color:var(--deep)}.nav-btn.switch{margin-left:auto}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;border-radius:10px;min-height:48px;padding:12px 23px;font-weight:700;line-height:1.5;text-align:center;transition:background .16s,transform .16s}.btn:hover:not(:disabled){transform:translateY(-1px)}.btn.primary{background:var(--deep);color:#fff;box-shadow:0 3px 0 #183324}.btn.primary:hover:not(:disabled){background:#355b44}.btn.secondary{background:#edf2e5;border-color:#d9e1ce}.btn.ghost{background:transparent;color:var(--muted)}.btn.danger{background:#fbebe1;color:#915735;border-color:#e5c4af}.btn.small{min-height:44px;padding:8px 14px;font-size:13px}.wide{width:100%}.badge{display:inline-flex;align-items:center;justify-content:center;gap:5px;padding:6px 11px;min-height:28px;font-size:11px;font-weight:700;border-radius:6px;letter-spacing:.4px;width:fit-content}.badge.mint{color:#3d6336;background:#dfedcf}.badge.neutral{background:#eef0e7;color:#75806b}.badge.orange{background:var(--orange);color:#916d3b}.badges{display:flex;gap:6px;flex-wrap:wrap}.avatar{object-fit:contain;border-radius:12px;image-rendering:pixelated}.avatar.tiny{width:36px;height:36px;border-radius:7px}.avatar.large{width:120px;height:120px;border-radius:18px}.player-chip{display:flex;gap:12px;align-items:center;font-size:14px}.points{display:inline-flex;gap:6px;align-items:center;font-size:13px;white-space:nowrap}.points .icon{color:#bd8c36;width:18px;height:18px}.points strong{font-size:17px}.points>span{color:var(--muted);font-size:12px}.player-chip .points{border-left:1px solid var(--line);padding-left:14px}.page-heading{padding:16px 0 28px}.page-heading h1{margin:8px 0 12px}.eyebrow{text-transform:uppercase;color:#798668;font-size:11px;font-weight:800;letter-spacing:2px}.panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:30px 0 18px}.section-heading h2{font-size:21px}.actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.field{display:flex;flex-direction:column;gap:9px;font-size:13px;font-weight:650;margin-bottom:18px;min-width:0}.field input,.field select,input[type=search]{width:100%;border:1px solid #d9dfd1;border-radius:9px;padding:12px 14px;min-height:48px;background:#fbfcf8;color:var(--ink)}.hint{background:#f0f3e8;border-radius:10px;padding:14px 18px;color:#727e65;font-size:13px;line-height:1.7}.empty{text-align:center;padding:56px 20px;border:1px dashed #d6decc;border-radius:16px;background:#f5f7ef;margin-top:20px}.empty>.icon{width:38px;height:38px;color:#99ad80;margin-bottom:18px}.empty h2{margin-bottom:10px}.empty .actions{margin-top:24px}.site-footer{max-width:1080px;margin:0 auto;padding:24px 32px;border-top:1px solid var(--line);display:flex;gap:14px;justify-content:space-between;font-size:11px;color:#84907b;line-height:1.7}.site-footer a{min-height:44px;display:flex;align-items:center;margin-top:-12px;margin-bottom:-12px;color:#5d7152}.loading{padding:100px 20px;text-align:center}.notice{position:fixed;z-index:100;bottom:24px;left:50%;transform:translateX(-50%);background:#fff5e5;box-shadow:0 5px 30px #243d3522;border:1px solid #ddc8a4;border-radius:12px;padding:12px 16px;display:flex;align-items:center;gap:12px;width:max-content;max-width:calc(100vw - 24px);font-size:14px}.notice span{line-height:1.6;max-width:540px}.card-dialog{border:1px solid #d4dcc9;border-radius:20px;padding:0;max-width:460px;width:calc(100vw - 32px);max-height:85svh;color:var(--ink);box-shadow:0 24px 100px #16332733}.card-dialog::backdrop{background:#1c332c66;backdrop-filter:blur(3px)}.dialog-content{padding:32px;display:flex;align-items:center;flex-direction:column;gap:18px;text-align:center}.dialog-content>.btn{width:100%}.dialog-content .badges{justify-content:center}.dialog-content p{text-align:left}.wide-dialog{max-width:760px}.chips{display:flex;gap:10px;flex-wrap:wrap}.chip{border:1px solid #dce3d3;border-radius:10px;background:#fff;min-height:48px;padding:12px 18px;color:#74816a;font-size:14px;font-weight:650}.chip.selected{color:#2f5435;border-color:#6d8f58;background:#e8f0df;box-shadow:inset 0 0 0 1px #6d8f58}.chip:disabled{background:#f3f3ed;color:#a4aa9e;opacity:1}.subtle-chips .chip{font-size:12px;min-height:44px;padding:9px 14px;border:0;background:transparent}.subtle-chips .chip.selected{box-shadow:none;background:#e8eddf}.meter-wrap{margin-top:20px}.meter-title{display:flex;justify-content:space-between;gap:8px;font-size:12px;margin-bottom:10px;color:#829073}.meter-title strong{color:#536e45;font-size:12px}progress{appearance:none;border:0;display:block;width:100%;height:7px;border-radius:20px;background:#e8ecdf;overflow:hidden}progress::-webkit-progress-bar{background:#e8ecdf;border-radius:20px}progress::-webkit-progress-value{background:#91b271;border-radius:20px}progress::-moz-progress-bar{background:#91b271;border-radius:20px}.search-form{display:flex;gap:10px;margin:20px 0 10px}.search-form input{flex:1;min-width:0}.knowledge-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin:20px 0}.knowledge-card{display:flex;flex-direction:column;align-items:center;gap:12px;border:1px solid var(--line);background:#fff;padding:20px 10px;border-radius:14px;min-height:205px;transition:border-color .15s,transform .15s}.knowledge-card:hover{border-color:#8da579;transform:translateY(-3px)}.knowledge-card strong{font-size:18px}.knowledge-card .badges{justify-content:center;gap:4px}.pinyin{color:#768972;font-size:12px}.history-row{display:flex;align-items:center;gap:16px;width:100%;padding:18px 0;text-align:left;background:transparent;border:0;border-bottom:1px solid var(--line);min-height:80px}.history-row:last-child{border-bottom:0}.history-icon{display:grid;place-items:center;flex-shrink:0;width:46px;height:46px;background:#eef2e7;border-radius:10px;color:#83a16b}.history-score{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:7px;white-space:nowrap}.history-list{padding-top:8px;padding-bottom:8px}.filter-bar{display:flex;align-items:flex-end;gap:12px;margin-bottom:20px}.filter-bar .field{margin:0;min-width:160px}.pagination{display:flex;gap:20px;align-items:center;justify-content:center;margin-top:20px;font-size:13px}.results .page-heading{text-align:center}.result-panel{text-align:center;max-width:750px;margin:auto}.result-emblem{display:grid;place-items:center;margin:0 auto 20px;width:70px;height:70px;background:#eef3df;border-radius:20px;color:#93a65b}.result-emblem .icon{width:38px;height:38px}.score-big{font-size:68px;font-weight:850;line-height:1.2;letter-spacing:-2px}.score-big span{font-size:30px;font-weight:500;color:#9da98a;letter-spacing:0}.result-panel>.badge{margin:12px 0}.result-metrics{display:grid;grid-template-columns:repeat(3,1fr);margin:26px 0;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:10px}.result-metrics>div{display:flex;flex-direction:column;gap:10px;align-items:center}.result-metrics>div+div{border-left:1px solid var(--line)}.result-metrics strong{font-size:28px}.result-metrics>div>span:last-child{color:var(--muted);font-size:12px}.result-panel .actions{margin-top:20px}.answer-record{padding:20px 22px;margin-bottom:12px;border:1px solid var(--line);border-radius:14px;background:#fff;display:flex;flex-wrap:wrap;align-items:center;gap:12px}.answer-record p{width:100%;margin:0}.success-note{color:#688254;text-align:center}.admin-main{padding-top:20px}.admin-heading{display:flex;gap:20px;align-items:center;justify-content:space-between}.parent-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.parent-card-head{display:flex;gap:16px;align-items:center;margin-bottom:24px}.parent-card-head h2{margin-bottom:6px}.mode-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mode-stats>div{display:flex;flex-direction:column;gap:10px;padding:16px;background:#f4f7ed;border-radius:12px;font-size:13px}.mode-stats strong{font-size:25px}.parent-card>p{margin-top:16px}.parent-progress{display:grid;grid-template-columns:1fr 1fr;gap:16px}details{border-top:1px solid var(--line);margin-top:20px;font-size:13px}summary{cursor:pointer;min-height:48px;padding:16px 0;font-weight:650}.review-tags{display:flex;gap:8px;flex-wrap:wrap;padding-bottom:8px}.profile-editor{margin-top:12px}.parent-card .history-row{gap:10px;font-size:12px}.parent-card .history-icon{display:none}.parent-card .history-row>.icon{width:16px}.export-panel{margin-top:28px}.export-panel>p{margin:12px 0 20px}.export-form{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:end}.export-form .field{margin:0}.admin-main>.hint,.admin-main section>.hint{margin-top:20px}.parent-unlock{max-width:550px;margin:45px auto}.parent-unlock>.btn{margin-top:16px}.wide-dialog .answer-record{text-align:left;width:100%}.wide-dialog .answer-list{width:100%}
@media(max-width:900px){.knowledge-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.parent-grid{grid-template-columns:1fr}.hero-copy h1{font-size:36px}.brand span{gap:5px}.export-form{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){.header-inner{min-height:74px;padding:12px 18px;gap:10px}.brand{font-size:16px;gap:8px}.brand img{width:28px;height:28px}.brand span{display:block}.brand small{display:block;font-size:10px;margin-top:3px}.player-chip{gap:6px;font-size:12px}.player-chip .points{padding-left:8px;gap:3px}.player-chip .points>span{display:none}.player-chip .points strong{font-size:15px}.avatar.tiny{width:28px;height:28px}.main{padding:0 18px 28px}.main-nav{gap:5px;padding:16px 0 20px;flex-wrap:nowrap}.nav-btn{padding:8px 9px;font-size:12px;gap:5px;white-space:nowrap}.nav-btn .icon{width:17px;height:17px}.nav-btn.switch{padding:8px 5px}.nav-btn.switch .icon{display:none}.site-footer{padding:22px 18px;align-items:center;font-size:10px;gap:10px}.site-footer>span{max-width:220px}.page-heading{padding:12px 0 22px}.page-heading h1{font-size:30px}.page-heading .muted{font-size:13px}.panel{padding:22px 18px}.section-heading{margin-top:24px}.section-heading h2{font-size:19px}.section-heading>.small{font-size:10px}.knowledge-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.knowledge-card{min-height:200px}.search-form .btn{padding:12px 14px}.chips{gap:8px}.chip{padding:10px 13px;font-size:13px}.filter-bar{flex-wrap:wrap;gap:10px}.filter-bar .field{flex:1;min-width:100px}.filter-bar>.btn{width:100%}.history-row{gap:10px}.history-row strong{font-size:13px}.history-row p{font-size:11px}.history-score .small{font-size:11px}.history-row>.icon{display:none}.history-icon{width:35px;height:35px}.notice{bottom:14px;flex-wrap:wrap;gap:8px}.notice>span{width:100%;font-size:13px}.notice .btn{min-height:44px}.result-metrics{gap:4px}.result-metrics strong{font-size:24px}.result-metrics>div>span:last-child{font-size:10px}.result-metrics .points>span{display:none}.result-panel .actions .btn{flex:1;padding:11px 14px;font-size:12px}.answer-record{padding:18px 15px;font-size:13px}.answer-record>.small{font-size:12px}.dialog-content{padding:28px 22px}.admin-main{padding-top:16px}.admin-heading{align-items:flex-start;flex-direction:column;gap:0;margin-bottom:20px}.admin-heading .page-heading{padding-bottom:16px}.export-form{grid-template-columns:1fr 1fr}.export-form>.btn{grid-column:1/-1}.parent-card .history-score{gap:5px}.parent-unlock{margin:22px auto}.parent-progress{gap:12px}.badge{font-size:10px}.points>strong{font-size:17px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.brand{flex-shrink:0}.player-chip{min-width:0}.player-chip>.avatar,.player-chip>.points{flex-shrink:0}.player-chip>strong{max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}@media(max-width:650px){.player-chip>strong{max-width:86px}}

/* Shared sound control stays above each player page, including quiz/results. */
.player-toolbar{display:flex;justify-content:flex-end;padding:12px 0 4px}.player-toolbar .btn{min-height:44px;white-space:nowrap}.player-toolbar .btn[aria-pressed="true"]{background:var(--mint,#e6f4d5);border-color:#b6cd94}.player-toolbar+.main-nav{padding-top:8px}
/* v2 家庭管理与平台概览 */
.avatar-picker{border:0;padding:0;margin:12px 0;min-width:0}.avatar-picker legend{font-weight:600;margin-bottom:12px}.avatar-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.avatar-choice{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;min-height:108px;padding:10px 4px;border:1px solid var(--line,#dfe5d8);border-radius:12px;cursor:pointer;background:#fcfdf8;text-align:center}.avatar-choice input{position:absolute;inset:0;opacity:0;width:100%;height:100%;cursor:pointer}.avatar-choice input:checked+img{outline:3px solid #456849;outline-offset:4px;border-radius:12px}.avatar-choice:focus-within{outline:2px solid #456849;outline-offset:2px}.avatar-choice .avatar{width:52px;height:52px}.child-add-form,.account-password-form{max-width:650px}.add-panel,.password-panel{margin-top:24px;padding:24px}.add-panel{scroll-margin-top:20px}.platform-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:24px 0}.metric-card{padding:20px;display:grid;gap:10px}.metric-card strong{font-size:34px}.trend-panel,.accounts-panel{padding:24px;margin:24px 0}.trend-list{display:grid;gap:12px}.trend-row{display:grid;grid-template-columns:48px repeat(3,minmax(0,1fr));gap:12px;align-items:center}.trend-cell{min-width:0}.trend-track{height:8px;background:#eff2e8;margin-bottom:3px;border-radius:4px;overflow:hidden}.trend-bar{display:block;height:100%;background:#568574}.trend-bar.active_children{background:#dcaa61}.trend-bar.completed_rounds{background:#8c80b4}.table-scroll{max-width:100%;overflow:auto}.accounts-table{width:100%;border-collapse:collapse;white-space:nowrap;font-size:14px}.accounts-table th,.accounts-table td{text-align:left;padding:14px 12px;border-bottom:1px solid #e3e8dc}.accounts-table th{background:#f1f4e9}.account-password-form{padding-top:18px}.profiles{grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr))}.parent-grid .avatar-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:600px){.platform-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.metric-card{padding:16px}.metric-card strong{font-size:28px}.avatar-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.avatar-choice .small{font-size:11px}.trend-panel,.accounts-panel,.add-panel,.password-panel{padding:18px}.trend-row{grid-template-columns:42px repeat(3,minmax(0,1fr));gap:8px}.trend-row .small{font-size:10px}.admin-heading{align-items:flex-start;flex-direction:column}.admin-heading .actions{flex-wrap:wrap}}
/* 游客提示与已有游客档案入口 */
.identity-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:18px 0 24px;padding:20px 24px;background:#f0f6e8}.identity-panel>div:first-child{flex:1;min-width:0}.identity-panel .actions{flex-shrink:0;max-width:360px}.login-form>.btn{margin-top:12px}.guest-metrics{margin-top:8px}.account-list-tabs{margin:16px 0}
@media(max-width:800px){.identity-panel{align-items:flex-start;flex-direction:column;padding:18px}.identity-panel .actions{max-width:100%;width:100%}.identity-panel .actions .btn{white-space:normal;text-align:center}.identity-panel .small{font-size:13px}}
.account-trend-row{grid-template-columns:48px repeat(4,minmax(0,1fr))}.trend-bar.new_guests{background:#6a95bb}
@media(max-width:600px){.account-trend-row{grid-template-columns:42px repeat(2,minmax(0,1fr))}.account-trend-row>span{grid-row:span 2}.account-trend-row .small{font-size:11px}}

/* 汽车品牌图片沿用现有卡片与闯关布局。 */
[hidden]{display:none!important}.brand-image{display:inline-flex;position:relative;align-items:center;justify-content:center;flex-direction:column;gap:8px;max-width:100%;background:#fff;border-radius:12px;min-height:72px;overflow:hidden}.brand-logo{display:block;width:100%;height:100%;object-fit:contain;max-width:100%;image-rendering:auto}.card-logo{width:112px;height:76px;padding:8px}.dialog-logo{width:240px;height:160px;padding:16px;margin:12px auto}.question-logo{width:min(280px,100%);height:164px;padding:16px;margin:4px auto 16px;border:1px solid var(--line)}.option-logo{width:100%;height:82px;padding:6px;min-width:0}.brand-image.image-failed .brand-logo{display:none}.image-load-note{font-size:12px;color:var(--muted);position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#f3f5ed}.brand-image.image-failed{min-height:96px}.brand-image.image-failed .btn{z-index:1;margin-top:40px}.image-options .option{min-height:112px;flex-wrap:wrap;justify-content:center;position:relative;padding:12px 16px}.image-options .option-letter{position:absolute;left:10px;top:10px;z-index:1}.image-options .option-logo{margin:0 16px}.image-options .option-brand-name{font-size:14px;flex-basis:100%;text-align:center}.quiz-image-notice{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:12px 0;font-size:13px;color:var(--muted)}.record-logo{width:128px;height:88px;padding:8px;margin:8px 0}.record-logos{display:flex;flex-wrap:wrap;gap:12px}.record-logos>div{display:flex;align-items:center;gap:8px}.topic-brand-symbol{display:inline-flex;align-items:center;justify-content:center;width:72px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff}.expedition.car_brand{background:#edf2fb}.expeditions{grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr))}@media(max-width:600px){.question-logo{height:144px;width:240px}.image-options{grid-template-columns:repeat(2,minmax(0,1fr))}.image-options .option{min-height:110px;padding:10px}.option-logo{height:76px}.image-options .option-logo{margin:6px 12px}.quiz-image-notice .btn{min-height:44px}}

.brand-image.dark-logo{background:#263d35}