:root{color-scheme:dark;--bg:#0c1429;--panel:#131f38;--line:#2b3b59;--muted:#9daec9;--text:#eff5ff;--gold:#f5cf80;--blue:#6497fd;--green:#71d5ad}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:radial-gradient(ellipse at 60% -10%,#233866,transparent 48%),linear-gradient(160deg,#0c1429,#0e1830 68%,#0a1121);color:var(--text);font:15px/1.6 system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI','Microsoft Yahei',sans-serif;margin:0;min-height:100vh}button,input{font:inherit}button{cursor:pointer;transition:transform .16s,filter .16s}button:not(:disabled):hover{transform:translateY(-2px);filter:brightness(1.07)}button:disabled{opacity:.45;cursor:not-allowed}.hidden{display:none!important}.shell{max-width:1300px;padding:18px 26px 45px;margin:auto}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.brand{display:flex;gap:12px;align-items:center}.brand-mark{width:42px;height:42px;display:grid;place-items:center;background:linear-gradient(135deg,#d5a762,#fff0c1);border-radius:11px;color:#1d2332;font-size:23px;font-weight:900}.brand strong{display:block;font-size:17px;letter-spacing:1px}.brand small{display:block;font-size:9px;letter-spacing:2px;color:#9caecb}.topbar-right{display:flex;align-items:center;gap:25px}.topbar a{color:#cddbf4;text-decoration:none}.online-pill{color:#b8e9da;font-size:13px;border:1px solid #3d706e;padding:7px 12px;border-radius:30px;background:#1a393d}.dot{display:inline-block;width:7px;height:7px;background:#75e1ac;border-radius:50%;margin-right:6px;box-shadow:0 0 12px #63ecb2}.hero{position:relative;min-height:320px;background:linear-gradient(115deg,#1d315a,#223e70 48%,#192b51);border:1px solid #4b6486;border-radius:23px;overflow:hidden;box-shadow:0 24px 52px #03071355}.hero-inner{position:relative;z-index:1;padding:29px 34px 27px;max-width:760px}.eyebrow{color:#ffe0a4;letter-spacing:2px;font-size:12px;font-weight:700}.hero h1{font-size:38px;letter-spacing:2px;line-height:1.24;margin:13px 0}.hero h1 em{color:var(--gold);font-style:normal}.hero p{max-width:590px;color:#cddcf4;margin:0 0 12px}.hero-stats{display:flex;gap:40px;margin:13px 0}.hero-stats div{display:flex;align-items:baseline;gap:7px}.hero-stats strong{font-size:25px;color:#f8da9f}.hero-stats small{font-size:12px;color:#c2d0e6}.start-form label{font-weight:700;display:block;margin-bottom:6px}.form-line{display:flex;gap:11px;max-width:515px}.form-line input{min-width:0;flex:1;background:#101e39;border:1px solid #6681b1;color:white;border-radius:12px;padding:13px 15px;outline:none}.form-line input:focus{border-color:#ffd88b}.form-line button, .quiz-controls button:not(.btn-secondary), .result-actions button:not(.btn-secondary){border:0;background:linear-gradient(105deg,#f8e1ae,#e6af51);color:#182136;font-weight:800;border-radius:12px;padding:12px 21px}.help{font-size:11px;color:#c2d1e8;display:block;margin-top:8px}.hero-decor{position:absolute;inset:0;left:auto;width:40%;pointer-events:none;display:grid;place-items:center}.huge-nine{font:900 215px/1 Georgia,serif;color:#ffe5ad26;text-shadow:0 0 40px #ecc47a33}.huge-label{position:absolute;bottom:65px;color:#e3cf9a88;letter-spacing:13px}.orbit{border:1px solid #f2dcac2b;position:absolute;border-radius:50%;width:270px;height:270px}.orbit-2{width:355px;height:355px}.columns{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:19px;margin-top:18px;align-items:start}.main-col,.side-col{min-width:0}.side-col{display:grid;gap:18px}.panel{background:linear-gradient(150deg,#14223e,#111c33);border:1px solid #314565;border-radius:20px;padding:22px;box-shadow:0 16px 35px #00000026}.section-heading{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:20px}.section-heading small{color:#d9b879;letter-spacing:1.8px;font-size:10px;font-weight:750}.section-heading h2{font-size:23px;margin:2px 0}.light-label,.refresh-note{color:#a6b5cd;font-size:12px}.map{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}.map-card{border-radius:16px;border:1px solid #354b6b;background:linear-gradient(145deg,#1b2d4d,#14213b);padding:15px;position:relative;min-height:136px;overflow:hidden}.map-card::after{content:'';position:absolute;border-radius:100px;width:75px;height:75px;right:-30px;top:-20px;background:var(--accent);opacity:.11}.map-card .stage{font-size:11px;color:#adc5ee}.map-card h3{font-size:17px;margin:7px 0 3px}.map-card p{font-size:12px;color:#aab9d0;margin:0}.map-card .counter{display:inline-block;padding:3px 8px;border-radius:8px;color:var(--accent);background:#091529;font-size:11px;margin-top:12px}.map-card .map-icon{float:right;color:var(--accent);font-size:21px}.map-footer{margin-top:17px;color:#c4d0e1;font-size:12px}.map-footer span{color:var(--gold);font-size:17px}.sidepanel{padding:18px}.compact{margin-bottom:13px}.compact h2{font-size:20px}.tabs{display:flex;gap:6px;padding:5px;border-radius:12px;background:#0b1730;margin-bottom:11px}.tab{flex:1;border:0;border-radius:9px;padding:10px;background:transparent;color:#a9badd;font-weight:700}.tab.active{color:#1b2a3d;background:#f4d59a}.ranking-list{min-height:120px;display:grid;gap:9px;align-content:start}.ranking-row{display:flex;align-items:center;gap:9px;background:#1b2b48;border:1px solid #2b3d5c;border-radius:12px;padding:10px}.rank-index{height:29px;width:29px;display:grid;place-items:center;background:#35476b;color:#edf2ff;border-radius:8px;font-weight:900}.ranking-row:nth-child(-n+3) .rank-index{background:#775c34;color:#ffdc86}.rank-meta{min-width:0;flex:1}.rank-meta strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rank-meta small{display:block;color:#8fa3c0;font-size:11px}.rank-score{font-weight:900;color:#f5d18b;font-size:20px}.empty{color:#9aaccb;text-align:center;padding:15px 0}.side-tip{color:#8196b5;font-size:11px;margin-bottom:0;line-height:1.8}.rule{display:flex;gap:12px;align-items:center;border-top:1px solid #30425d}.rule span{font-size:13px;color:#d3af70;font-weight:800}.rule p{margin:11px 0;color:#c1cfe5;font-size:13px}.notice{padding:13px 18px;border:1px solid #b67868;background:#422a34;border-radius:14px;margin-top:13px}.quiz-header{display:flex;justify-content:space-between;align-items:center;gap:12px}.quiz-header h2{margin:10px 0;font-size:25px}.stage-tag{background:#d9b975;color:#13223d;border-radius:999px;padding:5px 11px;font-size:12px;font-weight:800}.quiz-stats{text-align:right}.quiz-stats span,.quiz-stats strong{display:block}.quiz-stats span{color:#aebbd1}.progress-track{background:#0b1528;height:11px;border-radius:99px;overflow:hidden;margin:8px 0 18px}.progress-track div{background:linear-gradient(90deg,#558df4,#d7b572);height:100%;width:0%;transition:width .25s}.question-area{background:#172847;border:1px solid #304d72;padding:21px;border-radius:17px}.question-text{font-size:21px;font-weight:800;margin:0 0 20px;line-height:1.5}.choices{display:grid;gap:11px}.choice{background:#101f3b;color:#e0eafb;text-align:left;border:1px solid #344a6b;border-radius:13px;padding:13px;display:flex;align-items:center;gap:12px;width:100%;font-weight:500;line-height:1.5}.choice .letter{flex:none;background:#27395b;border-radius:9px;min-width:35px;height:35px;display:grid;place-items:center;font-weight:900}.choice.chosen{border-color:#f6ce81;background:#35324a}.choice.chosen .letter{color:#1d2940;background:#f6ce81}.quiz-controls{display:flex;gap:10px;align-items:center;justify-content:space-between;margin:20px 0 10px;flex-wrap:wrap}.quiz-controls button,.result-actions button{border-radius:10px;padding:10px 14px;font-size:14px}.btn-secondary{background:#243858;color:#dae7fd;border:1px solid #445a7a}.subtle,.quiz-footnote{color:#99acc9;font-size:12px}.quiz-footnote{border-top:1px solid #314361;padding-top:12px}.success-pill{background:#255849;color:#c5f6e3;padding:6px 11px;border-radius:99px}.score-summary{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:10px;margin-bottom:19px}.score-summary>div{background:#1d2e4b;border:1px solid #344965;padding:15px;border-radius:14px}.score-summary small{display:block;color:#a8b9d0}.score-summary strong{font-size:23px}.score-summary>div:first-child strong{font-size:45px;color:#f8d387}.score-summary span{color:#a8b9d0}.certificate{color:#27344b;background:#faf4e8;padding:15px;border:9px solid #decba6;box-shadow:0 14px 30px #0004}.certificate-border{border:2px solid #a99260;text-align:center;padding:22px 24px 17px;background:repeating-linear-gradient(45deg,#fffaf1,#fffaf1 24px,#fff9ed 25px,#fff9ed 48px)}.cert-badge{font-size:30px;color:#b99856}.cert-en{display:block;font-size:12px;letter-spacing:3px;color:#8d794c}.certificate h2{font-family:serif;font-size:31px;margin:5px 0 1px;color:#263c5a}.cert-subtitle{font-size:13px;letter-spacing:3px;margin:0}.cert-honor{font-size:13px;margin:25px 0 1px;color:#777}.certificate h3{font:700 28px/1.5 Georgia,serif;color:#384c69;margin:1px}.cert-text{margin:0;font-size:13px}.cert-score{display:flex;align-items:baseline;justify-content:center;gap:10px}.cert-score strong{font-size:51px;color:#a77c3d}.cert-score span{font-size:13px}.cert-footer{display:flex;justify-content:space-between;gap:9px;border-top:1px solid #c2ad82;margin-top:24px;padding-top:9px;font-size:11px}.certificate small{color:#74726a;font-size:10px}.cert-disclaimer{color:#848075;font-size:10px;margin:4px 0 0}.result-actions{margin:15px 0;display:flex;flex-wrap:wrap;gap:8px}.review{border-top:1px solid var(--line);padding-top:18px}.review-item{padding:13px;border-radius:12px;background:#1b2b48;margin:11px 0}.review-item p{margin:6px 0;font-size:13px}.review-item strong{color:#f9d393}.review-item .correct{color:#89dfbc}.review-item .wrong{color:#ffb5a3}footer{color:#8195b7;text-align:center;padding-top:24px;font-size:11px}
@media(max-width:1050px){.columns{grid-template-columns:1fr}.side-col{grid-template-columns:1fr 1fr}.hero-decor{opacity:.3}}
@media(max-width:660px){.shell{padding:10px 10px 30px}.topbar-right a{display:none}.hero-inner{padding:25px 19px}.hero h1{font-size:30px}.hero-stats{gap:17px}.hero-decor{display:none}.columns{gap:12px;margin-top:12px}.panel{padding:15px}.map{grid-template-columns:repeat(2,minmax(0,1fr))}.map-card{padding:12px;min-height:116px}.map-card h3{font-size:15px}.side-col{grid-template-columns:1fr}.form-line{flex-direction:column}.form-line input{width:100%}.section-heading h2{font-size:21px}.light-label{display:none}.question-text{font-size:18px}.quiz-controls .subtle{width:100%;order:3;text-align:center}.score-summary{grid-template-columns:1fr 1fr}.score-summary>div:first-child{grid-column:span 2}.cert-footer{flex-direction:column}.certificate{padding:5px;border-width:5px}.certificate-border{padding:17px 7px}.certificate h2{font-size:24px}.certificate h3{font-size:23px}.cert-en{font-size:9px;letter-spacing:1px}}
@media print{body{background:white}.topbar,.hero,.columns,.result-actions,.section-heading,.score-summary,footer,.review,.notice{display:none!important}.shell{padding:0}.main-col{width:100%}.panel{background:white;box-shadow:none;border:none;padding:0}.certificate{max-width:850px;margin:20px auto;box-shadow:none}.hidden{display:none!important}#resultPanel{display:block!important}}
/* 手机端交互补充 */
.live-metrics{display:flex;justify-content:space-around;gap:8px;padding:10px 8px;margin:10px 0;background:#182b4b;border-radius:12px;color:#c8d7f5;font-size:13px}
.leader-row{display:flex;align-items:center;gap:12px;padding:12px 6px;border-bottom:1px solid rgba(255,255,255,.09)}
.leader-name{flex:1;overflow-wrap:anywhere;font-weight:600}
.rank-index{width:29px;height:29px;border-radius:50%;display:grid;place-items:center;background:#283d5c;color:#dbe6fb;font-weight:800}
.rank-index.top{color:#241b08;background:linear-gradient(140deg,#f7eac2,#cda453)}
.leader-score{font-weight:900;color:#f9d887}
.active-dot{width:10px;height:10px;min-width:10px;border-radius:50%;background:#39d7a7;box-shadow:0 0 0 4px #39d7a722}
.review-item{background:#13213c;border:1px solid #394866;border-radius:16px;padding:15px;margin:13px 0;line-height:1.6}
.review-item p{color:#e7c477;margin:8px 0}
.review-item small{color:#afbdd9}
.choice{min-height:62px;text-align:left;display:flex;align-items:center;gap:12px;width:100%;border-radius:16px;margin-bottom:10px}
.choice-letter{display:grid;place-items:center;min-width:34px;height:34px;border-radius:10px;background:#1d335c;color:#e8f0ff}
.choice.selected{border-color:#dfbd69;background:rgba(223,189,105,.13)}
.choice.selected .choice-letter{background:#d9b76a;color:#10213f}
@media(max-width:740px){
 .shell{width:100%;padding:12px}
 .topbar{gap:9px}
 .hero{padding:18px 14px}
 .hero-inner h1{font-size:clamp(28px,8vw,38px);line-height:1.25}
 .hero-decor{display:none}
 .hero-stats{gap:9px}
 .form-line{display:flex;flex-direction:column;gap:10px}
 .form-line input,.form-line button{width:100%;min-width:0;min-height:48px}
 .columns{display:flex;flex-direction:column}
 .main-col,.side-col{width:100%;min-width:0}
 .panel{padding:16px 13px;border-radius:18px}
 .quiz-header{flex-wrap:wrap}
 .quiz-controls{display:flex;flex-wrap:wrap;gap:10px}
 .quiz-controls .subtle{width:100%;order:-1}
 .quiz-controls button{flex:1;min-width:120px;min-height:48px}
 .score-summary{flex-wrap:wrap;gap:10px}
 .score-summary>div{min-width:100px;flex:1}
 .result-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
 .result-actions button{font-size:13px;padding:12px 8px}
 .certificate{padding:10px}
 .certificate-border{padding:32px 13px}
 .certificate h2{font-size:25px}
 .certificate h3{font-size:26px;overflow-wrap:anywhere}
 .cert-footer{flex-wrap:wrap;gap:8px}
 .cert-text{font-size:13px}
}
@media print{body *{visibility:hidden!important}.certificate,.certificate *{visibility:visible!important}.certificate{position:absolute;left:0;top:0;width:100%;margin:0!important;background:white!important;box-shadow:none!important}.result-panel{display:block!important}}
/* PK leaderboard / winner certificate */
.leader-row .leader-name{min-width:0;flex:1}
.pk-btn{border:1px solid #f3d183;border-radius:10px;background:linear-gradient(125deg,#f9e0a0,#e4b454);color:#152039;font-weight:900;font-size:13px;min-width:43px;min-height:36px;padding:6px 9px}
.pk-btn:hover{filter:brightness(1.07)}
.leader-row .leader-score{white-space:nowrap}
.certificate.pk-success{border-color:#d2a544;background:#fff4d7}
.certificate.pk-success .certificate-border{border-color:#ae792b;background:linear-gradient(135deg,#fff8e8,#ffecc1)}
.certificate.pk-success .cert-text{font-size:clamp(19px,3vw,27px);font-weight:900;color:#ad4e18;margin:12px 0}
.certificate.pk-success h2{color:#a96312}
@media(max-width:470px){.leader-row{gap:7px;padding:10px 3px}.rank-index{width:25px;min-width:25px}.leader-name small{font-size:11px}.leader-score{font-size:14px}.pk-btn{min-width:37px;padding:6px}}