.practice-page.zh-page main{max-width:1440px}.zh-app{max-width:1320px;margin:auto}.zh-app .game{padding:28px}.zh-app h2{text-align:center;font-size:26px}.zh-help{max-width:850px;text-align:center;color:#52657c;line-height:1.6;margin:12px auto}.zh-app #zh-progress{height:100%;background:#163d68}.zh-scheme-scroll{width:100%;overflow-x:auto;margin:16px 0}.zh-scheme{display:grid;grid-template-columns:minmax(0,1fr) 180px repeat(2,minmax(0,1fr));gap:12px;align-items:start;min-width:1160px}.zh-diagram{width:100%;height:auto;display:block;shape-rendering:geometricPrecision}.zh-connector{text-align:center;color:#172532;font-size:20px}.zh-connector svg{display:block;width:180px;height:36px;margin:10px auto}.zh-heat{color:#52657c;font-size:16px}.zh-option{display:flex;flex-direction:column;align-items:center;gap:8px}.zh-option>div{width:100%}.zh-products button{min-width:190px;padding:14px;border:1px solid #a9bed7;border-radius:4px;background:white;color:#163d68;font-size:18px;font-weight:600}.zh-products button[aria-pressed=true]{background:#163d68;color:white;border-color:#163d68}.zh-products button.correct-choice{background:#e9f7ed;color:#166534;border-color:#228443}.zh-products button:disabled{opacity:1;cursor:default}.zh-app .bottom{justify-content:flex-end;gap:10px;margin-top:28px;padding-top:24px;border-top:1px solid #d8e2ee}.zh-app .bottom #zh-check,.zh-app .bottom #zh-next{margin-left:0}.zh-app .bottom button:disabled{opacity:.45}#zh-feedback{padding:14px 18px;margin-top:20px;border:2px solid transparent;border-radius:4px;line-height:1.6;background:#f0f5fb}#zh-feedback:empty{display:none}#zh-feedback[data-state=correct]{background:#e9f7ed;border-color:#228443;color:#166534}#zh-feedback[data-state=incorrect]{background:#fff0f0;border-color:#c8323e;color:#a51c26}@media(max-width:760px){.zh-app .game{padding:20px 12px}.zh-products button{min-width:190px}.zh-app .bottom{flex-wrap:wrap}.zh-help{font-size:14px}}