:root{--ink:#17231d;--muted:#68716c;--paper:#f6f3eb;--card:#fffdf8;--line:#d9d8cf;--green:#194e3b;--lime:#cde64b;--red:#9e3f35;--shadow:0 18px 60px rgba(23,35,29,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"SF Pro Display","PingFang SC",sans-serif}.hidden{display:none!important}button{font:inherit;cursor:pointer}.topbar{height:68px;padding:0 4vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:rgba(246,243,235,.94);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.brand{display:flex;gap:11px;align-items:center;font-weight:720}.brand-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--ink);color:var(--lime);font-family:Georgia,serif}.hero{min-height:650px;padding:90px max(6vw,40px) 70px;background:radial-gradient(circle at 82% 25%,rgba(205,230,75,.34),transparent 24%),linear-gradient(120deg,#f6f3eb 55%,#e7ead8)}.eyebrow,.section-label{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--green)}.hero h1,.result-view h1{font-family:Georgia,"Songti SC",serif;font-size:clamp(52px,6vw,92px);line-height:.98;letter-spacing:-.045em;margin:22px 0}.hero h1 em{color:var(--green);font-weight:400}.hero-copy{max-width:630px;font-size:18px;line-height:1.7;color:var(--muted)}.hero-actions,.result-actions{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}.primary-btn,.secondary-btn,.ghost-btn,.danger-btn{border-radius:7px;padding:14px 20px;border:1px solid var(--ink);font-weight:750}.primary-btn{background:var(--ink);color:white}.primary-btn span{color:var(--lime);margin-left:22px}.secondary-btn,.ghost-btn{background:transparent;color:var(--ink)}.danger-btn{background:var(--red);color:white;border-color:var(--red)}.metrics{display:flex;gap:55px;margin-top:70px}.metrics div{display:flex;gap:10px;align-items:baseline}.metrics strong{font:44px Georgia,serif}.metrics span{font-size:13px;color:var(--muted)}.how-it-works,.source-library{padding:90px max(6vw,40px)}.how-it-works h2,.source-library h2{font:46px Georgia,"Songti SC",serif;margin:12px 0 35px}.step-grid,.source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step-grid article,.source-card{background:var(--card);border:1px solid var(--line);padding:28px;min-height:210px}.step-grid article span{font:28px Georgia,serif;color:var(--green)}.step-grid h3{font-size:24px;margin:38px 0 8px}.step-grid p,.source-card p{color:var(--muted);line-height:1.65}.source-library{background:#ebe9df}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px}.section-head>p{max-width:430px;color:var(--muted)}.source-card{display:flex;flex-direction:column}.source-card .tag{align-self:flex-start;padding:5px 8px;border-radius:4px;background:#e2ead9;font-size:11px;font-weight:800}.source-card h3{font-size:20px;margin:20px 0 5px}.source-card a{margin-top:auto;color:var(--green);font-weight:800;text-decoration:none}.exam-tools{display:flex;align-items:center;gap:10px}.timer{font-variant-numeric:tabular-nums;font-size:22px;font-weight:850;padding:0 12px}.exam-view{height:calc(100vh - 68px);display:grid;grid-template-rows:72px 1fr 62px;background:#fff}.exam-head{display:flex;align-items:center;justify-content:space-between;padding:10px 30px;border-bottom:1px solid var(--line)}.exam-head p{font-size:11px;letter-spacing:.12em;color:var(--muted);margin:0}.exam-head h2{font:24px Georgia,serif;margin:5px 0}.progress-copy{font-size:13px;color:var(--muted)}.exam-split{display:grid;grid-template-columns:1fr 1fr;min-height:0}.passage-panel,.question-panel{overflow:auto;padding:32px clamp(24px,3vw,48px);scrollbar-color:#b6bab6 transparent}.passage-panel{border-right:1px solid var(--line);font-family:Georgia,"Songti SC",serif;font-size:17px;line-height:1.82}.passage-panel h3{font-size:29px}.passage-panel p{margin:0 0 1.2em}.question-group{margin-bottom:42px}.question-group h3{font-size:16px}.instruction{color:var(--muted);font-size:14px;line-height:1.55}.question{padding:17px 0;border-top:1px solid #ecece7}.question-header{display:flex;gap:10px;line-height:1.5}.q-number{flex:0 0 28px;width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:#eceee8;font-weight:800;font-size:12px}.options{display:grid;gap:8px;margin:12px 0 0 38px}.option{display:flex;gap:10px;padding:10px;border:1px solid var(--line);border-radius:6px}.option:has(input:checked){border-color:var(--green);background:#edf3e9}.text-answer{margin:12px 0 0 38px;width:min(380px,calc(100% - 38px));padding:12px;border:1px solid #aeb4af;border-radius:5px;font:inherit}.flag-label{display:inline-flex;align-items:center;gap:6px;margin:10px 0 0 38px;font-size:12px;color:var(--muted)}.question-nav{display:flex;align-items:center;gap:10px;padding:8px 20px;border-top:1px solid var(--line);overflow:hidden}.question-numbers{display:flex;gap:5px;overflow:auto;flex:1;padding:3px}.question-numbers button,.nav-arrow{width:34px;height:34px;border:1px solid var(--line);background:white;border-radius:5px;font-weight:700}.question-numbers button.answered{background:var(--green);color:white}.question-numbers button.flagged{outline:2px solid #d49c34}.question-numbers button.current{box-shadow:inset 0 0 0 2px var(--lime)}.pause-overlay{position:fixed;inset:0;background:rgba(23,35,29,.92);z-index:50;display:grid;place-items:center;color:white}.pause-overlay>div{text-align:center}.pause-overlay p{font:46px Georgia,serif}.result-view{max-width:1080px;margin:auto;padding:80px 30px}.score-card{display:flex;align-items:end;justify-content:space-between;padding:30px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.score-card strong{font:90px Georgia,serif;color:var(--green)}.score-card span{font-size:24px}.score-card p{max-width:400px;color:var(--muted)}.part-results{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:25px}.part-result{padding:20px;background:var(--card);border:1px solid var(--line)}.review-list{margin-top:35px}.review-item{padding:20px;border-top:1px solid var(--line)}.review-item.bad{border-left:4px solid var(--red)}.review-item.good{border-left:4px solid var(--green)}.review-item p{color:var(--muted)}
@media(max-width:800px){.hero{padding:65px 24px}.metrics{gap:22px}.step-grid,.source-grid,.part-results{grid-template-columns:1fr}.how-it-works,.source-library{padding:60px 24px}.section-head{align-items:start;flex-direction:column}.exam-split{display:block;overflow:auto}.passage-panel,.question-panel{overflow:visible;border-right:0}.exam-view{height:auto;min-height:calc(100vh - 68px);grid-template-rows:auto auto 62px}.question-nav{position:sticky;bottom:0;background:white}.topbar{padding:0 14px}.ghost-btn{display:none}.return-btn{display:inline-flex;padding:9px 10px}.exam-tools{gap:3px}.timer{font-size:18px;padding:0 5px}.danger-btn{padding:10px}.brand span:last-child{display:none}}
.test-library{padding:90px max(6vw,40px);background:#18241e;color:white}.test-library h2{font:46px Georgia,"Songti SC",serif;margin:12px 0 35px}.test-library .section-head>p{color:#aeb9b2}.exam-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.exam-card{background:#223229;border:1px solid #46554c;padding:30px;min-height:250px;display:flex;flex-direction:column}.exam-card .meta{color:var(--lime);font-size:12px;letter-spacing:.12em;font-weight:800}.exam-card h3{font:30px Georgia,serif;margin:22px 0 8px}.exam-card p{color:#b8c1bc;line-height:1.6}.exam-card button{margin-top:auto;align-self:flex-start;background:var(--lime);color:var(--ink);border:0;border-radius:5px;padding:12px 17px;font-weight:850}.history-panel{margin-top:28px}.history-row{display:grid;grid-template-columns:1fr auto auto;gap:20px;padding:15px 0;border-top:1px solid #46554c;color:#c9d0cc}.history-row b{color:white}@media(max-width:800px){.exam-grid{grid-template-columns:1fr}.test-library{padding:60px 24px}}
.cambridge-library{padding:90px max(6vw,40px);background:#f2efe6}.cambridge-library h2{font:46px Georgia,"Songti SC",serif;margin:12px 0 35px}.picker-panel{display:grid;grid-template-columns:1fr 1fr 1.4fr auto;gap:12px;background:var(--card);border:1px solid var(--line);padding:24px;box-shadow:var(--shadow)}.picker-panel label{display:grid;gap:8px}.picker-panel label span{font-size:12px;color:var(--muted);font-weight:800}.picker-panel select{width:100%;padding:13px;border:1px solid var(--line);border-radius:5px;background:white;font:inherit}.lime-btn{align-self:end;padding:14px 20px;border:0;border-radius:5px;background:var(--lime);color:var(--ink);font-weight:850}.catalog-summary{display:flex;gap:28px;margin-top:22px;color:var(--muted);font-size:13px}.book-view{height:calc(100vh - 68px);display:grid;grid-template-rows:78px 1fr;background:#e9e9e5}.book-head{display:flex;align-items:center;justify-content:space-between;padding:10px 24px;background:white;border-bottom:1px solid var(--line)}.book-head p{font-size:11px;letter-spacing:.12em;color:var(--muted);margin:0}.book-head h2{margin:5px 0;font:24px Georgia,serif}.book-actions{display:flex;gap:8px}.book-actions button{padding:10px 13px}.book-workspace{display:grid;grid-template-columns:minmax(0,1fr) 330px;min-height:0}.page-reader{min-width:0;display:grid;grid-template-rows:48px 1fr;background:#707070}.reader-toolbar{display:flex;align-items:center;justify-content:center;gap:10px;background:#343936;color:white}.reader-toolbar button{width:32px;height:30px;border:1px solid #6a706c;border-radius:4px;background:#4a504c;color:white}.reader-toolbar span:last-child{margin-left:14px;color:#cfd4d1;font-size:12px}.page-viewer{overflow:auto;padding:28px;text-align:center}.page-viewer img{display:block;width:100%;max-width:980px;height:auto;margin:0 auto 22px;background:white;box-shadow:0 4px 20px rgba(0,0,0,.35);transition:max-width .15s ease}.answer-sheet{background:#fff;padding:20px;overflow:auto;border-left:1px solid var(--line)}.sheet-title{display:flex;justify-content:space-between;align-items:center;position:sticky;top:-20px;background:white;padding:14px 0;z-index:2}.sheet-title h3{margin:0;font:22px Georgia,serif}.book-answers{display:grid;grid-template-columns:1fr 1fr;gap:8px}.book-answer{display:grid;grid-template-columns:28px 1fr;align-items:center;gap:6px}.book-answer label{font-size:12px;font-weight:800;color:var(--muted)}.book-answer input{width:100%;min-width:0;padding:8px;border:1px solid var(--line);border-radius:4px}.book-answer.outside{display:none}.answer-sheet textarea{width:100%;min-height:120px;margin-top:20px;padding:12px;border:1px solid var(--line);resize:vertical;font:inherit}@media(max-width:900px){.picker-panel{grid-template-columns:1fr 1fr}.book-workspace{grid-template-columns:1fr}.page-reader{height:70vh}.answer-sheet{border-left:0}.book-view{height:auto}.book-head{align-items:flex-start;gap:8px}.book-actions{flex-wrap:wrap}.cambridge-library{padding:60px 24px}}
.unified-library{padding:90px max(6vw,40px);background:#18241e;color:white}.unified-library h2{font:46px Georgia,"Songti SC",serif;margin:12px 0 35px}.unified-library .section-head>p{color:#aeb9b2}.unified-picker{display:grid;grid-template-columns:1fr 2fr 1.35fr auto;gap:12px;background:#223229;border:1px solid #46554c;padding:24px;box-shadow:var(--shadow)}.unified-picker label{display:grid;gap:8px}.unified-picker label span{font-size:12px;color:#b8c1bc;font-weight:800}.unified-picker select{width:100%;padding:13px;border:1px solid #617067;border-radius:5px;background:#fff;color:var(--ink);font:inherit}.paper-picker{min-width:0}.picker-disabled{opacity:.45}.unified-library .catalog-summary{color:#b8c1bc}.unified-library .history-row{border-color:#46554c;color:#c9d0cc}.unified-library .history-row b{color:#fff}@media(max-width:900px){.unified-picker{grid-template-columns:1fr 1fr}.unified-library{padding:60px 24px}.paper-picker{grid-column:span 2}}
@media(min-width:901px){
  .book-view{position:fixed;inset:68px 0 0;height:auto;overflow:hidden;grid-template-rows:78px minmax(0,1fr);z-index:10}
  .book-workspace{grid-template-columns:minmax(0,1fr) 440px;height:100%;overflow:hidden}
  .page-reader{height:100%;min-height:0;overflow:hidden}
  .page-viewer{overflow-x:auto;overflow-y:scroll;overscroll-behavior:contain}
  .answer-sheet{height:100%;overflow:hidden;padding:12px 16px}
  .sheet-title{position:static;padding:8px 0 12px}
  .book-answers{grid-template-columns:repeat(4,minmax(0,1fr));gap:7px 10px}
  .book-answer{grid-template-columns:18px minmax(0,1fr);gap:4px}
  .book-answer label{font-size:11px}
  .book-answer input{height:32px;padding:5px 6px}
  .answer-sheet textarea{min-height:72px;height:72px;margin-top:12px;padding:9px;resize:none;font-size:12px}
}

/* 扫描原件保存在服务器资料库中，不直接暴露文件目录。 */
.native-source-link{display:none!important}
.ocr-native-note{display:inline-block;margin:0 12px 24px 0;padding:7px 10px;border-radius:4px;background:#edf3e9;color:var(--green);font-family:Inter,"PingFang SC",sans-serif;font-size:11px;font-weight:800;letter-spacing:.05em}.ocr-question-copy{margin:16px 0 24px;padding:18px 20px;border:1px solid var(--line);border-left:4px solid var(--green);background:#faf9f4;font-size:14px;line-height:1.65;overflow-x:auto}.ocr-question-copy p{margin:0 0 8px}.ocr-question-copy p:last-child{margin-bottom:0}.ocr-reconstructed-sheet{min-width:720px;padding:4px 0 10px}.ocr-reconstructed-row{position:relative;min-height:29px}.ocr-reconstructed-row span{position:absolute;top:0;white-space:nowrap;line-height:1.45}.ocr-line{margin:0 0 6px}.ocr-question-copy+.question{border-top:1px solid var(--ink)}.question-header>div{white-space:pre-line}.question-header>div:not(:empty){padding-top:3px}.passage-panel>p{max-width:760px}.passage-panel>p:first-of-type{margin-top:0}.native-source-link{display:inline-block;margin-bottom:24px;font-family:Inter,"PingFang SC",sans-serif;font-size:12px;font-weight:750;color:var(--green)}
.inline-question-group .ocr-question-copy{padding:24px 26px;background:#fff;border-left:0}.ocr-flow-sheet{display:grid;gap:12px;min-width:0;font-size:16px;line-height:1.65}.ocr-flow-row{display:flex;align-items:center;flex-wrap:wrap;gap:5px;min-height:28px}.ocr-flow-row:first-child{font-weight:750}.ocr-flow-table{gap:0;border:1px solid var(--line);border-radius:6px;overflow:hidden}.ocr-table-intro{padding:9px 16px}.ocr-table-intro:first-child{padding-top:18px}.ocr-table-row{display:grid;grid-template-columns:1.05fr 1.3fr 1.35fr 1.1fr;gap:0;align-items:stretch;min-height:34px}.ocr-table-row>div{padding:6px 12px;border-left:1px solid var(--line)}.ocr-table-row>div:first-child{border-left:0}.ocr-table-intro+.ocr-table-row{margin-top:10px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#f3f4ef;font-weight:800}.inline-answer{display:inline-flex;align-items:center;gap:7px;vertical-align:middle;margin:2px 5px}.inline-answer>span{display:grid;place-items:center;flex:0 0 28px;width:28px;height:28px;border-radius:50%;background:#e9ede6;font-size:12px;font-weight:850}.inline-text-answer{margin:0!important;width:150px!important;padding:8px 10px!important;background:white}.inline-question-group{scroll-margin-top:80px}.inline-question-group>.instruction{display:none}@media(max-width:1100px){.ocr-table-row{grid-template-columns:180px 240px 260px 220px}.ocr-flow-table{min-width:900px}.inline-text-answer{width:125px!important}}