:root{--knowledge-bg:#eef6ff;--knowledge-ink:#17324d;--knowledge-muted:#66798b;--knowledge-line:#d9e7f2;--knowledge-card:#fff;--knowledge-main:#2563eb;--knowledge-main-dark:#1747b0;--knowledge-soft:#e8f1ff;--knowledge-good:#178153;--knowledge-warn:#c56a18;--knowledge-radius:24px;--knowledge-shadow:0 16px 42px rgba(31,68,103,.12);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif}*{box-sizing:border-box}html,body{margin:0;min-height:100%;color:var(--knowledge-ink);background:var(--knowledge-bg)}body{padding:0 0 max(88px,env(safe-area-inset-bottom));-webkit-tap-highlight-color:transparent}button,a{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.knowledge-task-card{background:var(--knowledge-card);border:1px solid var(--knowledge-line);border-radius:var(--knowledge-radius);box-shadow:var(--knowledge-shadow)}body.knowledge-task{padding:0;overflow:hidden}.knowledge-task-shell{height:100dvh;width:min(1180px,calc(100% - 24px));margin:0 auto;padding:10px 0;display:grid;grid-template-rows:62px minmax(0,1fr)}.knowledge-task-top{display:grid;grid-template-columns:150px 1fr 150px;align-items:center;gap:12px}.knowledge-back,.knowledge-task-top .knowledge-growth-link{border:1px solid var(--knowledge-line);background:#fff;padding:10px 13px;border-radius:14px;font-weight:900;text-align:center}.knowledge-task-title{text-align:center;min-width:0}.knowledge-task-title h1{margin:0;font-size:22px}.knowledge-task-title p{margin:3px 0 0;color:var(--knowledge-muted);font-weight:700;font-size:13px}.knowledge-task-card{min-height:0;padding:16px;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:12px}.knowledge-task-meta{display:grid;grid-template-columns:auto minmax(120px,1fr) auto;align-items:center;gap:12px}.knowledge-progress{font-weight:950;color:var(--knowledge-main-dark)}.knowledge-meter{height:9px;border-radius:999px;background:var(--knowledge-soft);overflow:hidden}.knowledge-meter i{display:block;height:100%;width:0;background:var(--knowledge-main);border-radius:inherit;transition:.25s width}.knowledge-levels{display:flex;gap:6px}.knowledge-levels button{border:1px solid var(--knowledge-line);background:#fff;color:var(--knowledge-muted);border-radius:999px;padding:7px 10px;font-weight:850}.knowledge-levels button.active{background:var(--knowledge-main);border-color:var(--knowledge-main);color:#fff}.knowledge-task-main{min-height:0;display:grid;grid-template-columns:minmax(270px,.78fr) minmax(0,1.22fr);gap:14px}.knowledge-visual,.knowledge-question-panel{border:1px solid var(--knowledge-line);border-radius:20px;background:linear-gradient(145deg,#fff,var(--knowledge-soft));min-height:0}.knowledge-visual{padding:18px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;position:relative;overflow:hidden}.knowledge-visual .knowledge-scene-label{font-size:13px;font-weight:950;color:var(--knowledge-main-dark);background:#fff;padding:6px 10px;border-radius:999px}.knowledge-visual h2{font-size:23px;margin:10px 0 5px}.knowledge-visual p{margin:0;color:var(--knowledge-muted);font-weight:700;line-height:1.5}.knowledge-compass{width:150px;height:150px;border:12px solid #fff;border-radius:50%;position:relative;box-shadow:0 12px 28px rgba(35,104,180,.16);margin-bottom:14px}.knowledge-compass:before,.knowledge-compass:after{content:"";position:absolute;inset:50% auto auto 50%;background:var(--knowledge-main);transform:translate(-50%,-50%)}.knowledge-compass:before{width:3px;height:115px}.knowledge-compass:after{width:115px;height:3px}.knowledge-compass span{position:absolute;font-weight:950;color:var(--knowledge-main-dark)}.knowledge-compass .n{top:3px;left:50%;transform:translateX(-50%)}.knowledge-compass .s{bottom:3px;left:50%;transform:translateX(-50%)}.knowledge-compass .w{left:7px;top:50%;transform:translateY(-50%)}.knowledge-compass .e{right:7px;top:50%;transform:translateY(-50%)}.knowledge-history-scroll{width:min(260px,100%);background:#fff8e9;border:2px solid #e5c58d;border-radius:10px;padding:20px 18px;box-shadow:0 10px 24px rgba(111,70,20,.13);margin-bottom:15px}.knowledge-history-scroll b{font-size:19px}.knowledge-history-scroll small{display:block;margin-top:7px;color:#7b5c3d;font-weight:700;line-height:1.55}.knowledge-orbit{width:150px;height:150px;border:2px dashed color-mix(in srgb,var(--knowledge-main) 48%,transparent);border-radius:50%;position:relative;margin-bottom:14px}.knowledge-orbit i{font-style:normal;position:absolute;width:70px;height:70px;border-radius:24px;background:#fff;display:grid;place-items:center;font-size:38px;left:50%;top:50%;transform:translate(-50%,-50%);box-shadow:0 10px 24px rgba(8,127,114,.15)}.knowledge-orbit:after{content:"?";position:absolute;width:36px;height:36px;border-radius:50%;right:0;top:5px;background:var(--knowledge-main);color:#fff;display:grid;place-items:center;font-size:22px;font-weight:950}.knowledge-question-panel{padding:18px;display:grid;grid-template-rows:auto auto minmax(0,1fr);gap:10px}.knowledge-question-kicker{font-size:13px;font-weight:950;color:var(--knowledge-main-dark)}.knowledge-question-panel h2{font-size:clamp(21px,2.3vw,29px);line-height:1.35;margin:0}.knowledge-choices{display:grid;gap:9px;align-content:center}.knowledge-choice{border:2px solid var(--knowledge-line);background:#fff;border-radius:16px;padding:13px 15px;text-align:left;font-weight:850;color:var(--knowledge-ink);min-height:50px;transition:.15s}.knowledge-choice:hover{border-color:var(--knowledge-main)}.knowledge-choice.wrong{border-color:#d85a55;background:#fff1f0;color:#9c2e2a}.knowledge-choice.correct{border-color:var(--knowledge-good);background:#edf9f3;color:#0b6a42}.knowledge-task-bottom{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px}.knowledge-feedback{min-height:54px;padding:11px 14px;border-radius:15px;background:var(--knowledge-soft);font-weight:750;line-height:1.45}.knowledge-feedback.good{background:#e8f8f0;color:#126846}.knowledge-feedback.try{background:#fff3df;color:#8b4d0d}.knowledge-next{border:0;border-radius:15px;background:var(--knowledge-main);color:#fff;padding:14px 20px;min-width:150px;font-weight:950;box-shadow:0 9px 20px color-mix(in srgb,var(--knowledge-main) 25%,transparent)}.knowledge-next[hidden]{display:none}.knowledge-explain{display:block;margin-top:4px;font-weight:650}.knowledge-finish{position:fixed;z-index:60;inset:0;background:rgba(14,28,42,.48);display:grid;place-items:center;padding:20px}.knowledge-finish[hidden]{display:none}.knowledge-completion-card{width:min(530px,100%);background:#fff;border-radius:28px;padding:28px;text-align:center;box-shadow:0 30px 80px rgba(0,0,0,.28)}.knowledge-completion-icon{width:76px;height:76px;border-radius:25px;background:var(--knowledge-soft);display:grid;place-items:center;margin:0 auto;font-size:40px}.knowledge-finish h2{font-size:29px;margin:14px 0 8px}.knowledge-finish p{color:var(--knowledge-muted);font-weight:700;line-height:1.6}.knowledge-reward{font-weight:950;color:var(--knowledge-main-dark);margin:10px 0 18px}.knowledge-completion-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}.knowledge-completion-actions button,.knowledge-completion-actions a{border:1px solid var(--knowledge-line);border-radius:15px;padding:13px;background:#fff;font-weight:900}.knowledge-completion-actions .primary{grid-column:1/-1;background:var(--knowledge-main);border-color:var(--knowledge-main);color:#fff}@media(max-width:850px){body{padding-bottom:max(84px,env(safe-area-inset-bottom))}.knowledge-task-shell{height:auto;min-height:100dvh;width:min(100% - 18px,720px);grid-template-rows:auto auto;padding-bottom:18px}.knowledge-task-top{grid-template-columns:100px 1fr 100px;min-height:66px}.knowledge-task-card{min-height:calc(100dvh - 84px)}.knowledge-task-main{grid-template-columns:1fr}.knowledge-visual{min-height:250px}.knowledge-task-meta{grid-template-columns:1fr}.knowledge-levels{justify-content:center}.knowledge-task-bottom{grid-template-columns:1fr}.knowledge-next{width:100%}}@media(max-width:560px){.knowledge-task-top{grid-template-columns:76px 1fr 76px}.knowledge-back,.knowledge-task-top .knowledge-growth-link{font-size:12px;padding:9px 6px}.knowledge-task-title h1{font-size:18px}.knowledge-task-card{padding:11px}.knowledge-visual{min-height:215px}.knowledge-question-panel{padding:14px}.knowledge-completion-card{padding:22px}.knowledge-completion-actions{grid-template-columns:1fr}.knowledge-completion-actions .primary{grid-column:auto}}@media(min-width:900px) and (orientation:landscape){body.knowledge-task .knowledge-visual{min-height:0}.knowledge-task-main{overflow:hidden}.knowledge-question-panel,.knowledge-visual{overflow:auto}.knowledge-choices{overflow:auto}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.knowledge-map-layers{width:min(270px,100%);display:grid;gap:9px;margin-bottom:14px}.knowledge-map-layer{display:flex;align-items:center;justify-content:space-between;gap:10px;border:2px solid var(--knowledge-line);background:#fff;border-radius:16px;padding:11px 14px;font-weight:900}.knowledge-map-layer:nth-child(2){margin-inline:18px}.knowledge-map-layer:nth-child(3){margin-inline:36px}.knowledge-map-layer i{font-style:normal;font-size:22px}.knowledge-map-layer em{font-style:normal;color:var(--knowledge-main);font-size:12px}@media(max-width:850px){body.knowledge-task{overflow:auto}}