*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;outline:none}
:root{
  --bg:#f0f2f5;--card:#fff;--primary:#2065c4;--primary-d:#174a8f;--primary-l:#e8f0fd;
  --text:#1a1a2e;--text2:#555;--text3:#888;--border:#e0e0e0;--radius:12px;
  --green:#27ae60;--red:#e74c3c;--orange:#f39c12;--shadow:0 2px 12px rgba(0,0,0,.06);
  --shadow-lg:0 8px 30px rgba(0,0,0,.12);--maxw:960px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* Header */
header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}
.header-inner{max-width:var(--maxw);margin:0 auto;padding:0 20px;height:60px;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:20px;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:8px;cursor:pointer}
.logo svg{width:28px;height:28px}
.logo-img{height:38px;object-fit:contain}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--text);width:44px;height:44px;align-items:center;justify-content:center;flex-shrink:0;border-radius:8px;transition:.2s}
.nav-toggle:hover{background:var(--primary-l)}
nav ul{display:flex;gap:4px;list-style:none;flex-wrap:wrap}
nav a{display:block;padding:8px 14px;border-radius:8px;font-size:14px;color:var(--text2);transition:.2s;white-space:nowrap}
nav a:hover,.nav-active{background:var(--primary-l);color:var(--primary);text-decoration:none}
.nav-active{font-weight:600}

/* Main */
main{max-width:var(--maxw);margin:0 auto;padding:20px;min-width:0}
main>h1{font-size:28px;font-weight:700;margin-top:80px;margin-bottom:12px;color:var(--text);text-align:center}
main>p{font-size:15px;line-height:1.7;color:var(--text2);margin-bottom:20px;max-width:800px;text-align:center;margin-left:auto;margin-right:auto}

/* Test Area */
.test-area{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:24px}
.test-content{padding:0;min-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative}

/* Reaction Time Test */
.rt-zone{width:100%;height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;user-select:none;transition:background .15s}
.rt-zone.state-idle{background:var(--primary);color:#fff}
.rt-zone.state-wait{background:var(--red);color:#fff}
.rt-zone.state-go{background:var(--green);color:#fff}
.rt-zone.state-result{background:var(--primary);color:#fff}
.rt-zone.state-early{background:var(--primary);color:#fff}
.rt-title{font-size:28px;font-weight:700;margin-bottom:8px}
.rt-sub{font-size:16px;color:inherit;opacity:.8}
.rt-big{font-size:64px;font-weight:700;line-height:1}
.rt-unit{font-size:20px;font-weight:400;margin-left:4px}
.rt-hint{margin-top:16px;font-size:14px;opacity:.6}

/* Stats bar */
.stats-bar{display:flex;gap:16px;padding:16px 20px;border-top:1px solid var(--border);flex-wrap:wrap}
.stat-item{text-align:center;flex:1;min-width:80px}
.stat-label{font-size:12px;color:var(--text3);margin-bottom:4px}
.stat-val{font-size:22px;font-weight:700;color:var(--primary)}

/* CPS Test */
.cps-zone{width:100%;height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;user-select:none;transition:background .15s}
.cps-zone.active{background:var(--primary-l)}
.cps-time-btns{display:flex;gap:8px;margin-bottom:20px}
.cps-time-btn{padding:6px 16px;border:1px solid var(--border);border-radius:8px;background:var(--card);cursor:pointer;font-size:14px;font-family:var(--font);transition:.2s}
.cps-time-btn:hover{border-color:var(--primary)}
.cps-time-btn.cps-active{background:var(--primary);color:#fff;border-color:var(--primary)}
.cps-display{font-size:56px;font-weight:700;color:var(--primary)}
.cps-label{font-size:16px;color:var(--text2);margin-top:8px}
.cps-count{font-size:20px;color:var(--text2);margin-top:12px}
.cps-timer{font-size:48px;font-weight:700;color:var(--orange);margin-top:16px}

/* Aim Trainer */
.aim-zone{width:100%;height:420px;position:relative;background:#fafafa;overflow:hidden;cursor:crosshair}
.aim-target{position:absolute;width:60px;height:60px;border-radius:50%;background:var(--primary);cursor:pointer;transform:translate(-50%,-50%);transition:transform .1s;box-shadow:0 4px 12px rgba(32,101,196,.3)}
.aim-target:hover{transform:translate(-50%,-50%) scale(1.05)}
.aim-info{position:absolute;top:12px;left:12px;right:12px;display:flex;justify-content:space-between;font-size:14px;color:var(--text2);z-index:5;pointer-events:none}
.aim-start{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;z-index:5}
.aim-start-btn{padding:16px 48px;font-size:20px;border:none;border-radius:12px;background:var(--primary);color:#fff;cursor:pointer;font-family:var(--font);transition:.2s;box-shadow:var(--shadow-lg)}
.aim-start-btn:hover{background:var(--primary-d)}

/* Number Memory */
.mem-zone{width:100%;height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;user-select:none}
.mem-num{font-size:56px;font-weight:700;letter-spacing:4px;color:var(--text)}
.mem-input{padding:12px 20px;font-size:24px;border:2px solid var(--border);border-radius:10px;text-align:center;width:280px;max-width:90%;font-family:var(--font);margin:20px 0;letter-spacing:2px}
.mem-input:focus{border-color:var(--primary)}
.mem-level{font-size:18px;color:var(--text2);margin-bottom:16px}
.mem-btn{padding:12px 32px;font-size:18px;border:none;border-radius:10px;background:var(--primary);color:#fff;cursor:pointer;font-family:var(--font);transition:.2s}
.mem-btn:hover{background:var(--primary-d)}
.mem-status{font-size:20px;font-weight:600;margin:16px 0}
.mem-status.success{color:var(--green)}
.mem-status.fail{color:var(--red)}

/* Sequence Memory */
.seq-zone{width:100%;height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;user-select:none}
.seq-grid{display:grid;grid-template-columns:repeat(3,80px);grid-template-rows:repeat(3,80px);gap:8px;margin:16px 0}
.seq-cell{border-radius:10px;background:var(--primary-l);cursor:pointer;transition:background .15s}
.seq-cell.flash{background:var(--green);transform:scale(.95)}
.seq-cell.active{background:var(--primary)}
.seq-cell:hover{background:var(--primary-l)}
.seq-info{font-size:18px;color:var(--text2)}

/* Color Reaction */
.color-zone{width:100%;height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;user-select:none}
.color-word{font-size:56px;font-weight:700;margin-bottom:30px}
.color-options{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.color-opt{padding:16px 32px;border-radius:12px;border:none;cursor:pointer;font-size:18px;font-family:var(--font);transition:.2s;color:#fff;font-weight:600}
.color-opt:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.color-score{font-size:20px;color:var(--text2);margin-top:20px}
.color-timer-bar{width:300px;max-width:90%;height:6px;background:var(--border);border-radius:3px;margin-top:12px;overflow:hidden}
.color-timer-fill{height:100%;background:var(--green);transition:width .1s linear}

/* Typing Test */
.type-zone{width:100%;height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px}
.type-text{font-size:22px;line-height:1.8;text-align:center;color:var(--text3);margin-bottom:20px;max-width:600px;user-select:none}
.type-text .char-correct{color:var(--green)}
.type-text .char-wrong{color:var(--red);background:#fde8e8}
.type-text .char-current{border-left:2px solid var(--primary);animation:blink 1s infinite}
@keyframes blink{50%{border-color:transparent}}
.type-input{width:100%;max-width:600px;padding:14px 20px;font-size:20px;border:2px solid var(--border);border-radius:10px;font-family:var(--font);resize:none;height:100px}
.type-input:focus{border-color:var(--primary)}
.type-stats{display:flex;gap:30px;margin-top:20px}
.type-stat{text-align:center}
.type-stat-val{font-size:32px;font-weight:700;color:var(--primary)}
.type-stat-label{font-size:13px;color:var(--text3)}

/* Stroop Test */
.stroop-zone{width:100%;min-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;user-select:none;padding:20px 0;box-sizing:border-box}
.stroop-word{font-size:64px;font-weight:700;margin-bottom:30px}
.stroop-q{font-size:18px;color:var(--text2);margin-bottom:20px}
.stroop-opts{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:360px}
.stroop-opt{padding:18px 24px;border-radius:12px;border:2px solid var(--border);cursor:pointer;font-size:18px;font-family:var(--font);transition:.2s;background:var(--card)}
.stroop-opt:hover{border-color:var(--primary);background:var(--primary-l)}
.stroop-score{font-size:20px;color:var(--text2);margin-top:20px}

/* Content Sections */
.content-section{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px;margin-bottom:24px;scroll-margin-top:80px;min-width:0;overflow:hidden}
.content-section h2{font-size:24px;font-weight:700;margin-bottom:16px;color:var(--text)}
.content-section h3{font-size:18px;font-weight:600;margin:20px 0 10px;color:var(--text)}
.content-section p{color:var(--text2);margin-bottom:12px;font-size:15px}
.content-section ul,.content-section ol{color:var(--text2);padding-left:20px;margin-bottom:12px}
.content-section li{margin-bottom:6px;font-size:15px}

/* Score Table */
#leaderboardContent,.table-wrap{overflow:auto;-webkit-overflow-scrolling:touch}
#leaderboardContent{max-height:75vh}
.score-table{width:100%;min-width:320px;border-collapse:separate;border-spacing:0;margin:16px 0;font-size:14px}
.score-table thead th{position:sticky;top:0;z-index:1;background:var(--primary-l);color:var(--primary);font-weight:600}
.score-table th,.score-table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap}
.score-table td{color:var(--text2)}
.score-table th:nth-child(1),.score-table td:nth-child(1){width:64px;min-width:64px}

/* Leaderboard */
.lb-empty{text-align:center;color:var(--text3);padding:24px;font-size:14px}
.lb-rank-circle{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;font-weight:700;font-size:13px}
.lb-rank-1{background:#ffd700;color:#fff}
.lb-rank-2{background:#c0c0c0;color:#fff}
.lb-rank-3{background:#cd7f32;color:#fff}
.lb-rank-other{background:transparent;color:var(--text2)}
.lb-my-score{position:sticky;bottom:0;z-index:2}
.lb-my-score tr{background:var(--card)}
.lb-my-row td{color:var(--primary)!important;font-weight:600;border-top:2px solid var(--primary)}
.lb-me{color:var(--primary);font-weight:400;font-size:12px}
.score-table tbody tr:last-child td{padding-bottom:48px}
.lb-flag{font-size:28px;line-height:1;vertical-align:middle}
@media(max-width:480px){.lb-flag{font-size:18px}}
.score-table tbody tr:nth-child(1){background:rgba(255,215,0,.08)}
.score-table tbody tr:nth-child(2){background:rgba(192,192,192,.08)}
.score-table tbody tr:nth-child(3){background:rgba(205,127,50,.08)}
.lb-submit-zone{width:100%;min-height:300px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}
.lb-submit-title{font-size:24px;font-weight:700;color:var(--text)}
.lb-submit-score{font-size:18px;color:var(--text2)}
.lb-submit-score strong{color:var(--primary);font-size:22px}
.lb-name-wrap{position:relative;width:260px}
.lb-name-label{position:absolute;top:-7px;left:50%;transform:translateX(-50%);background:var(--card);padding:0 8px;font-size:11px;color:var(--red);z-index:1;white-space:nowrap}
.lb-name-input{width:260px;padding:12px 16px;font-size:16px;border:2px solid var(--border);border-radius:10px;font-family:var(--font);text-align:center;background:transparent;position:relative;z-index:0}
.lb-name-input:focus{border-color:var(--primary);outline:none}
.lb-submit-btns{display:flex;gap:12px}
.lb-submit-btn{padding:12px 32px;border-radius:10px;border:none;background:var(--primary);color:#fff;font-size:16px;font-family:var(--font);cursor:pointer;transition:.2s}
.lb-submit-btn:hover{opacity:.9}
.lb-submit-btn:disabled{opacity:.5;cursor:not-allowed}
.lb-cancel-btn{padding:12px 24px;border-radius:10px;border:2px solid var(--border);background:var(--card);color:var(--text2);font-size:16px;font-family:var(--font);cursor:pointer;transition:.2s}
.lb-cancel-btn:hover{border-color:var(--text3)}
.lb-submit-link{display:inline-block;margin-top:12px;margin-bottom:8px;padding:8px 20px;border-radius:8px;border:1px solid var(--primary);background:transparent;color:var(--primary);font-size:14px;font-family:var(--font);cursor:pointer;transition:.2s}
.lb-submit-link:hover{background:var(--primary);color:#fff}
.rt-zone .lb-submit-link,.cps-zone .lb-submit-link{border-color:#fff;color:#fff}
.rt-zone .lb-submit-link:hover,.cps-zone .lb-submit-link:hover{background:#fff;color:var(--primary)}
.lb-submit-done{border-color:var(--primary)!important;color:var(--primary)!important}
.lb-submit-done:hover{background:var(--primary)!important;color:#fff!important}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border);padding:16px 0}
.faq-q{font-size:16px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--text)}
.faq-q::after{content:'+';font-size:22px;color:var(--primary);transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease;color:var(--text2);font-size:15px}
.faq-a>p{overflow:hidden;margin:0}
.faq-item.open .faq-a{grid-template-rows:1fr;padding-top:12px}

/* Tips cards */
.tips-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:16px}
.tip-card{padding:20px;border-radius:10px;background:var(--primary-l);text-align:center}
.tip-card .tip-icon{font-size:32px;margin-bottom:8px}
.tip-card h4{font-size:15px;font-weight:600;margin-bottom:6px}
.tip-card p{font-size:13px;color:var(--text2);margin:0}

/* Related tools */
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-top:16px}
.related-card{padding:16px;border:1px solid var(--border);border-radius:10px;text-align:center;transition:.2s;cursor:pointer;display:block;text-decoration:none}
.related-card:hover{border-color:var(--primary);box-shadow:var(--shadow);text-decoration:none}
.related-card .r-icon{font-size:28px;margin-bottom:8px}
.related-card h4{font-size:14px;font-weight:600;margin-bottom:4px;color:var(--text)}
.related-card p{font-size:12px;color:var(--text3);margin:0}

/* Rating table */
.rating-bar{display:flex;align-items:center;gap:12px;margin:8px 0}
.rating-label{width:60px;font-size:14px;color:var(--text2);text-align:right}
.rating-track{flex:1;height:24px;background:var(--border);border-radius:12px;overflow:hidden;position:relative}
.rating-fill{height:100%;border-radius:12px;transition:width .5s}
.rating-text{width:80px;font-size:13px;color:var(--text2)}

/* Footer */
footer{background:var(--card);border-top:1px solid var(--border);padding:32px 20px;margin-top:24px}
.footer-inner{max-width:var(--maxw);margin:0 auto;text-align:center}
.footer-inner p{font-size:13px;color:var(--text3);margin-bottom:8px}
.footer-links{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}
.footer-links a{font-size:13px;color:var(--text2)}

/* Toast */
.toast{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(.8);background:var(--text);color:#fff;padding:14px 28px;border-radius:12px;font-size:15px;z-index:200;transition:transform .3s;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none}
.toast.show{transform:translate(-50%,-50%) scale(1);opacity:1}

/* Responsive */
@media(max-width:900px){
  .header-inner{padding:0 12px}
  .nav-toggle{display:flex}
  nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--card);border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg)}
  nav.open{display:block}
  nav ul{flex-direction:column;padding:12px}
  nav a{padding:12px 14px}
  main{padding:12px}
  .content-section{padding:20px 16px}
  .test-content{min-height:360px}
  .rt-zone,.cps-zone,.aim-zone,.mem-zone,.seq-zone,.color-zone,.type-zone{height:360px}
  .stroop-zone{min-height:360px}
  .rt-big{font-size:48px}
  .cps-display{font-size:42px}
  .mem-num{font-size:40px}
  .seq-grid{grid-template-columns:repeat(3,64px);grid-template-rows:repeat(3,64px)}
  .color-word,.stroop-word{font-size:42px}
  .color-opt{padding:12px 20px;font-size:16px}
  .color-options{gap:8px}
  .type-text{font-size:18px}
}

/* Floating Menu */
.float-menu{position:fixed;right:20px;bottom:80px;display:flex;flex-direction:column;gap:12px;z-index:90}
.float-btn{width:48px;height:48px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:var(--shadow);transition:.2s;background:var(--primary);color:#fff}
.float-btn:hover{background:var(--primary-d);color:#fff;transform:translateY(-2px)}
@media(max-width:700px){
  .float-menu{right:12px;bottom:60px}
  .float-btn{width:42px;height:42px;font-size:18px}
}