@import url('/course-assets/reader-v2.css');
:root{--lime:#65e2bd;--accent:#147a61;--line:#d8e3dc;--paper:#f5f8f5;--teal:#17c69b}
html{scroll-padding-top:100px}body{overflow-wrap:anywhere}a,button,input,textarea,summary{outline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #18876a}.skip-link{position:fixed;left:15px;top:-80px;z-index:100;background:#142e26;color:white;padding:12px}.skip-link:focus{top:8px}header{min-height:90px}.reader-brand{gap:14px}.sai-logo-frame{width:132px;height:62px;background:#03140e;border-radius:10px;overflow:hidden;position:relative;flex:0 0 132px}.sai-logo-frame img{position:absolute;width:270px;height:180px;max-width:none;left:50%;top:50%;transform:translate(-50%,-50%)}.reader-wordmark b{font-size:14px;letter-spacing:.03em}.reader-wordmark small{font-size:10px}.reader-layout{grid-template-columns:260px minmax(0,1fr);gap:32px}.reader-sidebar{top:116px;height:calc(100vh - 146px)}.reader-main{max-width:1000px}.reader-cover{background:linear-gradient(125deg,#12252e,#0d2921)}.reader-cover h1{font-size:clamp(25px,2.4vw,36px)}.reader-info{margin-top:12px}.reader-prose{padding:30px 34px}.reader-prose p{margin:13px 0 17px}.reader-prose h2{font-size:25px}.reader-prose h3{font-size:19px}.enhancement-section{padding:18px 0 26px;border-bottom:1px solid var(--line);margin-bottom:24px;scroll-margin-top:112px}.enhancement-section:last-child{border-bottom:0}.section-label{font:11px ui-monospace,monospace;color:#16856a;letter-spacing:.08em}.enhancement-section h2{margin-top:12px}.section-intro,.local-notice,.coverage-note{font-size:13px;color:#5b7669;line-height:1.8}.outcome{font-size:19px;font-weight:700;color:#123a2d;line-height:1.7}.identity-card{border-left:4px solid #2ac49b;border-radius:0 12px 12px 0;padding:17px 20px;background:#eff7f1;margin:20px 0}.identity-card p{margin:8px 0;font-size:13px}.identity-card small{display:block;color:#557268;line-height:1.8}.prerequisite-box{padding:16px 19px;border:1px dashed #b5cfc0;border-radius:12px;font-size:13px;margin:20px 0}.prerequisite-box strong{display:block;margin-bottom:8px}.prerequisite-box a{display:block;margin:6px 0}.prerequisite-box p{margin:9px 0 0;color:#627468;font-size:12px}.material-links{display:flex;flex-wrap:wrap;gap:9px}.material-links a{min-width:145px;padding:11px 15px;background:#f2f6f1;border:1px solid #d7e3d7;border-radius:9px;text-decoration:none}.material-links b{display:block;font:12px ui-monospace,monospace}.material-links span{display:block;font-size:10px;color:#688375;margin-top:6px}.material-actions,.assignment-actions{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0}.first-win{border:1px solid #9cdcc3;border-radius:14px;padding:18px 20px;margin-top:25px;background:#f4fbf7}.first-win>span{display:inline-flex;color:#176149;font-size:11px;font-weight:700;background:#d3f1e4;padding:5px 10px;border-radius:50px}.first-win h3{font-size:18px;margin:14px 0}.first-win p{font-size:12px}.step-nav{display:flex;gap:6px;flex-wrap:wrap;background:#eaf0e8;padding:10px;border-radius:13px;margin:20px 0 10px}.step-nav a{display:inline-flex;gap:6px;align-items:center;text-decoration:none;color:#325a49;padding:8px 10px;border-radius:8px;font-size:12px;font-weight:700}.step-nav span{font:10px ui-monospace,monospace;color:#778c7c}.step-nav a:hover,.step-nav a.step-active{background:#113b2c;color:white}.content-toc{font-size:12px;margin:0 0 23px;padding:12px 16px;border:1px solid var(--line);border-radius:10px;background:white}.content-toc summary{cursor:pointer;font-weight:700}.content-toc a{display:block;padding:7px 0;color:#577363}.lesson-figure{margin:24px 0 30px;background:#f9fbf8;border:1px solid #d5e1d7;border-radius:14px;overflow:hidden}.figure-meta{display:flex;flex-wrap:wrap;gap:8px;padding:12px 15px;border-bottom:1px solid #dce5dc;background:#edf4ec;font-size:10px}.figure-meta span:first-child{font-weight:700;color:#226046}.figure-meta span:last-child{color:#7a7465}.figure-open{border:0;background:transparent;display:block;padding:0;width:100%;position:relative;cursor:zoom-in;line-height:0;text-align:center}.figure-open img,.reader-prose .figure-open img{margin:0 auto;border-radius:0;display:block;width:100%;height:auto;max-height:650px;object-fit:contain;object-position:top}.figure-zoom{position:absolute;right:12px;bottom:12px;background:rgba(15,41,31,.88);color:white;padding:9px 12px;border-radius:50px;font-size:10px;line-height:1.2}.lesson-figure figcaption{padding:15px 19px;border-top:1px solid var(--line);font-size:12px;line-height:1.8}.lesson-figure figcaption strong{display:block;font-size:14px}.lesson-figure figcaption small{display:block;color:#738270;margin-top:4px}.lesson-figure figcaption p{margin:8px 0;font-size:12px}.lesson-figure figcaption a{font-weight:700}.state-observation{display:grid;gap:0;margin:0;border-top:1px solid var(--line);background:white}.state-observation>div{display:grid;grid-template-columns:88px 1fr;gap:12px;padding:13px 19px;border-bottom:1px solid #ecf0e9}.state-observation dt{font-size:12px;font-weight:700;color:#29775a}.state-observation dd{margin:0;font-size:13px;line-height:1.8}.lesson-content-title{margin-top:18px}.operation-step{padding:12px 0;border-bottom:1px dashed #d7e0d3}.practice-stages{display:flex;flex-direction:column;gap:12px;margin:20px 0}.practice-stages>div{display:grid;grid-template-columns:78px 1fr;gap:16px;padding:15px 17px;border:1px solid #dbe5d9;border-radius:12px;background:#f8fbf5}.practice-stages span{font-size:12px;font-weight:700;color:#32734f;padding-top:3px}.practice-stages p{font-size:14px;margin:0}.output-tags{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}.assignment-label{display:block;font-size:14px;font-weight:700;margin:25px 0 10px}textarea{width:100%;max-width:100%;padding:16px;border:1px solid #b5cbbb;border-radius:10px;font:13px/1.8 ui-monospace,"Microsoft YaHei",sans-serif;background:#fafcf8;color:#21392e;resize:vertical;min-height:130px}.manual-check{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1px solid #d9e2d5;border-radius:10px;margin:10px 0;background:#f9fbf5}.manual-check input{margin-top:5px;flex:0 0 auto;accent-color:#11795a;width:17px;height:17px}.manual-check b{display:block;font-size:13px}.manual-check small{display:block;margin-top:5px;color:#6b7e68;font-size:12px;line-height:1.7}.recovery-card{background:#fffaf1;border:1px solid #ecdac0;border-radius:10px;padding:14px 17px;margin:10px 0;font-size:13px}.recovery-card summary{cursor:pointer;font-weight:700;color:#795b2e}.recovery-card p{margin:10px 0 0}.enhancement-section fieldset{border:1px solid #d4e0d0;border-radius:12px;padding:18px;margin:20px 0}.enhancement-section legend{font-size:14px;font-weight:700;padding:0 8px;line-height:1.7}.quiz-option{display:flex;align-items:flex-start;gap:10px;border-radius:8px;padding:11px 12px;margin:4px 0;background:#f4f7f0;cursor:pointer;line-height:1.7;font-size:13px}.quiz-option input{margin-top:5px;accent-color:#197c58}.quiz-option:has(input:checked){background:#daf2e6;outline:1px solid #9accb4}.feedback{font-size:13px;color:#8b6630;background:#fff8e8;border-radius:9px;padding:12px 15px;margin:12px 0;line-height:1.8}.feedback:empty{display:none}.feedback[hidden]{display:none}.feedback-pass{color:#236947;background:#e6f7ec}#quiz-summary{font-size:13px;line-height:1.8}.learning-status-strip{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}.learning-status-strip>span{border:1px solid #577467;border-radius:8px;padding:8px 11px;font-size:10px;color:#aec8bb}.learning-status-strip b{font-size:11px;color:white;display:block;margin-bottom:2px}.learning-status-strip .status-done{border-color:#62d8a7;background:#225541}.image-dialog{width:min(1320px,96vw);height:min(900px,92vh);max-width:96vw;max-height:92vh;border:1px solid #547868;border-radius:14px;background:#f5f8f3;padding:0;overflow:hidden;color:#1b392c}.image-dialog[open]{display:flex;flex-direction:column}.image-dialog::backdrop{background:rgba(0,18,12,.85);backdrop-filter:blur(5px)}.image-dialog-bar{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;border-bottom:1px solid #cedccc;gap:12px;font-size:13px}.image-dialog-bar div{display:flex;gap:7px;align-items:center}.image-dialog-bar button{background:white;border:1px solid #c0d4c1;border-radius:8px;padding:7px 12px;font-size:12px}.image-dialog-scroll{flex:1;min-height:0;overflow:auto;padding:15px;background:#eaf0e9}.image-dialog-scroll img{display:block;height:auto;max-width:none;object-fit:contain}.image-dialog-caption{flex:0 0 auto;max-height:120px;overflow:auto;padding:12px 17px;margin:0;font-size:12px;line-height:1.8;border-top:1px solid #d5dfd1}.reader-footer{border-top:1px solid var(--line);padding-top:22px}.source-coverage{display:flex;flex-direction:column;gap:10px}.source-coverage article{padding:17px;border:1px solid var(--line);border-radius:10px}.source-coverage h3{margin:0 0 8px}.source-coverage p{font-size:13px}.source-coverage code{font-size:11px}.learning-center-select{display:flex;gap:15px;flex-wrap:wrap;padding:20px;background:#edf5ee;border-radius:12px}.learning-center-select label{display:flex;flex-direction:column;gap:8px;font-size:12px;font-weight:700}.learning-center-select select{padding:10px;border:1px solid #bccfbb;border-radius:8px;max-width:100%;background:white;font:13px inherit}.journey-list{display:flex;flex-direction:column;gap:9px}.journey-item{display:flex;gap:15px;padding:15px 18px;border:1px solid var(--line);border-radius:10px;text-decoration:none!important;align-items:center}.journey-item>span{font:13px ui-monospace,monospace;color:#65a580}.journey-item>div{flex:1}.journey-item b{display:block;font-size:14px}.journey-item small{display:block;margin-top:5px;font-size:11px;color:#698064}.journey-item em{font-size:11px;font-style:normal;background:#e1f2e7;padding:5px 8px;border-radius:6px}.journey-item:hover{background:#f0f9f0}.backup-actions{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.reader-button.danger{background:#fff5ef;border-color:#ddbaa7;color:#81553d}@media(max-width:900px){.reader-layout{grid-template-columns:225px minmax(0,1fr);gap:22px;padding:25px 20px}.reader-prose{padding:27px 23px}.header-links{font-size:11px}}@media(max-width:800px){header{min-height:74px;padding:10px 13px;gap:8px}.sai-logo-frame{width:92px;height:45px;flex-basis:92px}.sai-logo-frame img{width:190px;height:127px}.reader-wordmark b{font-size:11px}.reader-wordmark small{font-size:8px}.reader-brand{gap:8px}.header-links{gap:8px;font-size:10px}.header-links a:nth-child(3){display:none}.reader-layout{display:block;padding:16px 13px}.reader-main{margin-top:17px}.reader-prose{padding:22px 17px;font-size:14px}.reader-prose h2{font-size:21px}.step-nav{padding:8px;gap:4px}.step-nav a{padding:7px;font-size:11px}.step-nav span{font-size:9px}.state-observation>div{grid-template-columns:72px 1fr;gap:7px;padding:13px}.state-observation dd{font-size:12px}.lesson-figure figcaption{padding:13px}.practice-stages>div{grid-template-columns:1fr;gap:8px}.image-dialog-bar{padding:10px;font-size:10px}.image-dialog-bar div{gap:4px}.image-dialog-bar button{padding:7px;font-size:10px}.figure-open img,.reader-prose .figure-open img{max-height:none}.material-links a{min-width:120px;flex:1}.reader-cover{padding:23px 19px}.outcome{font-size:17px}.reader-context{padding:14px}.journey-item{padding:13px 12px;gap:10px}.journey-item b{font-size:12px}.journey-item em{font-size:9px}.learning-center-select{padding:16px;gap:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{.step-nav,.content-toc,.assignment-actions,.image-dialog,.learning-center-select{display:none}.enhancement-section{break-inside:avoid}.lesson-figure img{max-height:350px}}

.glossary{margin:18px 0 0;display:grid;grid-template-columns:160px 1fr;gap:13px 18px;font-size:12px;line-height:1.8}.glossary dt{font-weight:700;color:#257053}.glossary dd{margin:0;color:#5a7062}.source-lesson-links{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0}.source-lesson-links a{font-size:11px;padding:6px 9px;border:1px solid #d4e3ce;border-radius:6px;text-decoration:none}@media(max-width:600px){.glossary{grid-template-columns:1fr;gap:7px}.glossary dd{margin-bottom:9px}}

/* S.ai安全留白：只调整框内图像显示尺寸，不重绘用户标识。 */
.sai-logo-frame img { width: 228px; height: auto; }
@media (max-width: 800px) {
  .sai-logo-frame img { width: 152px; height: auto; }
}

/* 当前实拍使用自然比例，避免桌面高度上限把操作文字缩成小字。 */
.lesson-figure[data-asset-kind="live-app"] .figure-meta { background: #dff5ec; border-bottom-color: #b9dbc9; }
.lesson-figure[data-asset-kind="live-app"] .figure-meta span:first-child { color: #125c43; }
.lesson-figure[data-asset-kind="live-app"] .figure-open img { max-height: none; }