:root{color-scheme:light;--paper:#faf8ef;--bg:#efecdf;--ink:#33392f;--muted:#727768;--line:#d7d5c5;--olive:#5d684a;--rust:#9b543a;--pale:#e9ecdf;--shadow:0 14px 35px #413c2210}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}button,select,input{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);padding:9px 15px;min-height:44px}button:hover,a:hover{filter:brightness(.96)}button:disabled{opacity:.55;cursor:default}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #9b7b42;outline-offset:3px}a{color:var(--olive);text-decoration:none}h1,h2,h3,p{margin:0}h1,h2,h3,.brand{font-family:"Songti SC","Noto Serif CJK SC",STSong,serif}h1{font-size:clamp(28px,3.5vw,42px);letter-spacing:.04em;font-weight:500;line-height:1.35}h2{font-size:23px;font-weight:500;line-height:1.4}h3{font-size:20px}.practice-header{min-height:94px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:18px max(24px,calc((100vw - 1280px)/2));gap:24px;background:#f7f4e9}.brand{font-size:28px;letter-spacing:.13em;color:#624b37;white-space:nowrap}.brand span{display:block;font:11px/1.4 sans-serif;letter-spacing:.08em;color:var(--muted);margin-top:3px}.practice-header nav{display:flex;align-items:center;gap:12px;font-size:14px;flex-wrap:wrap}.practice-header nav a{padding:10px}.practice-header nav button{background:transparent}main{max-width:1280px;margin:0 auto;padding:36px 24px 48px}.intro{display:flex;gap:36px;justify-content:space-between;align-items:center;margin:8px 0 32px}.intro p:not(.eyebrow){margin-top:15px;max-width:690px;color:var(--muted)}.eyebrow{font-size:11px;letter-spacing:.14em;color:var(--rust);font-weight:650;margin-bottom:8px}.intro-mark{color:#a7a995;display:flex;align-items:center;gap:15px;font:76px/1 STSong,serif;padding-right:20px}.intro-mark span{font:10px/1.8 sans-serif;letter-spacing:.2em}.study-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:24px;align-items:start}.paper{background:var(--paper);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:24px}.course-settings{position:sticky;top:20px}.course-settings h2{font-size:22px;margin-bottom:22px}.course-settings label{display:block;font-size:13px;margin:16px 0 6px}.course-settings select{width:100%;border:1px solid var(--line);background:#fffdf5;padding:11px 10px;border-radius:5px;color:var(--ink);font-size:14px;min-height:46px}.muted{font-size:13px;color:var(--muted);line-height:1.65}.course-settings .muted{margin-top:10px}.storage-note{border-top:1px solid var(--line);padding-top:18px;margin-top:24px;color:var(--muted);font-size:12px}.study-right{display:grid;gap:22px;min-width:0}.summary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.summary-card{border:1px solid var(--line);background:#f7f4e9;padding:17px;border-radius:8px}.summary-card strong{font:32px/1.2 Georgia,serif;color:var(--olive);display:block}.summary-card span{display:block;font-size:12px;color:var(--muted);margin-top:6px}.mode-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:15px}.mode{padding:13px;text-align:left;border-radius:6px;min-height:92px}.mode strong{font-weight:600;font-size:15px;display:block}.mode small{display:block;color:var(--muted);font-size:12px;line-height:1.5;margin-top:4px}.mode[aria-pressed=true]{border:2px solid var(--olive);padding:12px;background:var(--pale)}.start-line{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:22px;margin-top:22px;border-top:1px solid var(--line)}.start-line strong{font-size:14px}.primary{background:var(--olive);color:white;border-color:var(--olive);font-weight:600;padding:12px 22px;min-width:148px}.primary span{margin-left:20px}.resume-line{margin-top:16px;padding:13px;background:#f1eee0;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:13px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:18px}.section-heading button{font-size:12px}.knowledge-row{padding:14px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center}.knowledge-row strong{font-size:14px;display:block;font-weight:500}.knowledge-row small{font-size:12px;color:var(--muted)}.state-badge{display:inline-block;border:1px solid var(--line);padding:2px 8px;border-radius:20px;font-size:11px;white-space:nowrap}.state-review{color:#91442f;background:#f7e7de;border-color:#dcc1ac}.state-retest{color:#76612b;background:#f5eed3}.state-secure{background:#e0e8d5;color:#3f593b;border-color:#b5c4a2}.empty-note{padding:22px 0;color:var(--muted)}.practice-footer{text-align:center;font-size:12px;padding:24px;color:var(--muted);border-top:1px solid var(--line)}.session-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:24px;font-size:13px}.session-progress{height:5px;background:#d9dacd;border-radius:4px;overflow:hidden;flex:1;max-width:300px}.session-progress div{height:100%;background:var(--olive)}.question-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;align-items:start}.question-paper{padding:32px}.question-tags{display:flex;gap:8px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:18px}.question-tags span{background:#eeeddf;padding:2px 9px;border-radius:4px}.question-paper h1{font-family:inherit;font-size:23px;letter-spacing:0;line-height:1.8;font-weight:550;white-space:pre-line}.options{display:grid;gap:13px;margin:26px 0}.option{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--line);border-radius:7px;padding:16px;background:#fffef8;cursor:pointer;min-height:62px}.option input{position:absolute;opacity:0;pointer-events:none}.option:has(input:focus-visible){outline:3px solid #9b7b42;outline-offset:3px}.option:has(input:checked){border-color:var(--olive);box-shadow:inset 0 0 0 1px var(--olive);background:#ecefe3}.option-letter{flex:0 0 28px;height:28px;display:grid;place-items:center;border-radius:50%;border:1px solid #c4c8b7;font:15px Georgia,serif;line-height:1}.option p{font-size:16px;line-height:1.65}.option.is-correct{background:#eaf0e3;border-color:#758767}.option.is-wrong{background:#f7e8e0;border-color:#b47a63}.option:has(input:disabled){cursor:default}.question-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.question-actions .muted{flex:1}.question-reference{font-size:14px}.question-reference h2{font-size:22px;margin-bottom:12px}.event-link{display:block;text-align:left;width:100%;margin:9px 0;font-size:13px;line-height:1.6;background:#fffdf7}.event-link small{display:block;color:var(--muted);font-size:11px}.question-reference .muted{margin:14px 0}.feedback{margin-top:26px;padding:22px;background:#f1f0e4;border-radius:8px;border-top:3px solid var(--olive)}.feedback.wrong{border-color:var(--rust)}.feedback h2{font-family:inherit;font-size:18px;font-weight:600}.feedback>p{margin-top:12px;font-size:15px}.option-explanations{margin:18px 0 0;padding:0;list-style:none;font-size:14px}.option-explanations li{padding:10px 0;border-top:1px solid var(--line)}.option-explanations b{margin-right:8px;color:var(--olive)}.result-paper{max-width:880px;margin:auto}.result-score{font:70px/1.2 Georgia,serif;color:var(--olive);margin:22px 0 6px}.result-list{margin-top:24px}.result-item{border-top:1px solid var(--line);padding:18px 0}.result-item p{margin-top:6px;font-size:14px}.result-item summary{cursor:pointer;font-size:15px}.result-item summary strong{color:var(--rust);margin-right:10px}dialog{border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);max-width:900px;width:calc(100% - 36px);max-height:90dvh;padding:0;box-shadow:0 22px 80px #28261640}dialog::backdrop{background:#333a314d}dialog>header{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:20px;position:sticky;top:0;background:var(--paper);z-index:1}dialog>header button{font-size:24px;line-height:1}#practice-dialog-body{padding:24px}#practice-dialog-body p{margin-bottom:14px}#practice-dialog-body h3{margin:22px 0 10px}#practice-dialog-body li{margin:8px 0}#practice-dialog-body a{display:inline-block;margin:6px 12px 6px 0;text-decoration:underline}.record-actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.coverage-table{border-collapse:collapse;width:100%;font-size:13px}.coverage-table td,.coverage-table th{text-align:left;border-bottom:1px solid var(--line);padding:10px 5px}.source-list{font-size:13px}.practice-status:not(:empty){position:fixed;bottom:22px;left:50%;transform:translateX(-50%);max-width:calc(100% - 32px);background:#333b2e;color:white;padding:10px 18px;border-radius:6px;z-index:5}#practice-status:not(:empty){position:fixed;bottom:22px;left:50%;transform:translateX(-50%);max-width:calc(100% - 32px);background:#333b2e;color:white;padding:10px 18px;border-radius:6px;z-index:5}.event-period{color:var(--rust);font-size:14px;margin:8px 0 20px}.event-facts{padding-left:20px}.study-event-related{padding-top:18px;border-top:1px solid var(--line)}[hidden]{display:none!important}
@media(max-width:1020px){.study-layout{grid-template-columns:250px minmax(0,1fr);gap:18px}.mode-grid{grid-template-columns:1fr 1fr}.question-layout{grid-template-columns:minmax(0,1fr) 250px;gap:18px}.question-paper{padding:24px}.paper{padding:20px}.summary-card{padding:13px}.summary-card strong{font-size:28px}.question-paper h1{font-size:21px}}
@media(max-width:780px){.practice-header{padding:14px 18px;gap:14px;flex-wrap:wrap}.brand{font-size:25px}.brand span{font-size:10px}.practice-header nav{gap:6px;font-size:12px}.practice-header nav button{padding:7px 10px}main{padding:24px 18px 36px}.intro-mark{display:none}.intro{margin:5px 0 24px}.intro p:not(.eyebrow){font-size:14px}.study-layout{display:block}.course-settings{position:static;margin-bottom:20px;display:grid;grid-template-columns:1fr 1fr;gap:8px 14px}.course-settings .eyebrow,.course-settings h2,.course-settings .muted,.course-settings .storage-note{grid-column:1/-1}.course-settings h2{margin-bottom:4px}.course-settings label{margin-top:4px;align-self:center}.course-settings select{font-size:14px}.course-settings .storage-note{margin-top:8px;padding-top:12px}.question-layout{grid-template-columns:1fr}.question-reference{order:2}.question-reference .event-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.question-reference .event-link{margin:0}.session-top{flex-wrap:wrap}.session-progress{max-width:none;flex-basis:100%;order:3}.question-paper h1{font-size:21px}.question-paper{padding:24px}.question-paper .option p{font-size:17px}.summary-card strong{font-size:28px}.summary-card{padding:12px}.start-line{align-items:flex-start}.section-heading{align-items:flex-start}dialog{width:calc(100% - 24px);max-height:calc(100dvh - 24px)}dialog>header,#practice-dialog-body{padding:18px}}
@media(max-width:480px){.summary-grid{grid-template-columns:1fr 1fr}.mode-grid{grid-template-columns:1fr 1fr}.mode-grid .mode:last-child{grid-column:1/-1}.start-line{flex-direction:column}.start-line .primary{width:100%}.question-paper{padding:18px}.option{padding:13px;gap:10px}.question-paper h1{font-size:19px}.section-heading{display:block}.section-heading button{margin-top:10px}.question-reference .event-links{grid-template-columns:1fr}.intro h1{font-size:28px}.practice-header nav{width:100%;justify-content:space-between}.practice-header nav a{padding:8px 0}.knowledge-row{grid-template-columns:1fr;gap:5px}.state-badge{width:max-content}.session-top>span{font-size:12px}.question-actions .primary{width:100%}.resume-line{flex-wrap:wrap}.result-score{font-size:56px}}
@media(prefers-reduced-motion:no-preference){button,a,.option{transition:background .12s,border-color .12s}}
.knowledge-actions{display:flex;flex-direction:column;align-items:flex-end;gap:7px;flex-shrink:0}.knowledge-actions button{font-size:12px;min-height:44px;padding:5px 10px}.supplement-catalog{margin-top:22px}.supplement-catalog>summary{cursor:pointer;font-weight:600;padding:10px 0}.supplement-catalog .event-link{margin-top:8px}@media(max-width:480px){.knowledge-row{align-items:flex-start}.knowledge-actions{max-width:125px}.knowledge-actions button{font-size:11px}.state-badge{white-space:normal;text-align:center}}