:root{--learning-shadow:0 18px 44px rgba(7,24,45,.1)}
.skip-link{position:fixed;left:18px;top:-80px;z-index:1000;background:#fff;color:#07182d;border:2px solid #2f72e3;padding:12px 16px;font-weight:800;text-decoration:none}.skip-link:focus{top:12px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #2f72e3;outline-offset:3px}
.learning-nav-link{white-space:nowrap}.home-learning-status{display:grid;grid-template-columns:minmax(0,.8fr) minmax(360px,1.2fr);gap:70px;align-items:center;padding-top:52px;padding-bottom:56px;background:#fff;border-bottom:1px solid var(--line)}.learning-status-copy h2{font-family:Georgia,"Songti SC",serif;font-size:clamp(2rem,3.4vw,3.2rem);line-height:1.1;letter-spacing:-.04em;margin-bottom:13px}.learning-status-copy>p:last-child{color:var(--muted);margin:0}.learning-status-panel{background:var(--pale);border-left:4px solid var(--blue);padding:24px 28px}.learning-progress-row{display:flex;justify-content:space-between;gap:20px;margin-bottom:12px;color:var(--muted)}.learning-progress-row strong{color:var(--ink)}.learning-progress-track{height:10px;background:#d8e0e9;overflow:hidden;margin:0 0 19px}.learning-progress-track i{display:block;width:var(--progress,0%);height:100%;background:var(--blue);transition:width .25s ease}.learning-status-panel p{margin:0 0 18px;color:var(--muted)}.learning-status-panel p b{color:var(--ink)}.learning-status-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.learning-status-actions>a:not(.primary-button){color:var(--blue);font-weight:800}
.learning-tools{border:1px solid var(--line);border-top:4px solid var(--blue);background:#fff;padding:22px 24px;margin:-24px 0 46px}.learning-tools-head{display:flex;align-items:end;justify-content:space-between;gap:20px}.learning-tools-head .eyebrow{margin:0 0 5px}.learning-tools-head h2{font-size:1.18rem;margin:0}.learning-tools-head>span{font-size:.78rem;color:var(--muted)}.learning-tool-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.tool-button,.quiz-submit,.lesson-complete-button,.dashboard-data button,.import-label{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid #9cadc1;background:#fff;color:var(--ink);padding:10px 14px;font:800 .86rem/1.2 Arial,"Microsoft YaHei",sans-serif;text-decoration:none;cursor:pointer}.tool-button:hover,.quiz-submit:hover,.dashboard-data button:hover,.import-label:hover{border-color:var(--blue);color:var(--blue)}.bookmark-button[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff}.download-button{border-color:var(--blue);color:var(--blue)}.lesson-note{margin-top:18px;border-top:1px solid var(--line);padding-top:13px}.lesson-note summary{cursor:pointer;font-weight:800}.lesson-note label{display:block;color:var(--muted);font-size:.8rem;margin:15px 0 7px}.lesson-note textarea{width:100%;resize:vertical;border:1px solid #9cadc1;background:#f9fbfd;color:var(--ink);font:inherit;line-height:1.65;padding:12px;min-height:130px}.note-save-status{font-size:.76rem;color:var(--muted);margin:6px 0 0;text-align:right}
.lesson-quiz{background:#eef2f6;border-top:4px solid var(--orange);padding:28px;margin:52px 0}.lesson-quiz .eyebrow{margin-bottom:6px}.lesson-quiz>h2{font-family:Georgia,"Songti SC",serif;font-size:2rem;margin-bottom:8px}.lesson-quiz>p{color:var(--muted)}.quiz-question{border:0;border-top:1px solid #b8c5d3;padding:22px 0 8px;margin:0}.quiz-question legend{font-weight:900;padding:0 10px 0 0}.quiz-question label{display:block;background:#fff;border:1px solid var(--line);padding:12px 14px;margin:9px 0;cursor:pointer}.quiz-question label:has(input:checked){border-color:var(--blue);background:#edf4ff}.quiz-question input{margin-right:10px;accent-color:var(--blue)}.quiz-explanation{padding:13px 15px;margin:10px 0;font-size:.9rem}.quiz-explanation.is-correct{background:#e3f3ee;border-left:4px solid var(--green)}.quiz-explanation.is-wrong{background:#fff0ea;border-left:4px solid var(--orange)}.quiz-submit{background:var(--blue);border-color:var(--blue);color:#fff;margin-top:14px}.quiz-submit:hover{background:var(--navy);color:#fff}.quiz-result{font-weight:800;margin:13px 0 0}.quiz-result.is-error{color:#a53e25}.quiz-result.is-success{color:#167157}.lesson-complete-button{width:100%;margin-top:18px;background:var(--ink);border-color:var(--ink);color:#fff}.lesson-complete-button:disabled{cursor:not-allowed;background:#d8e0e9;border-color:#d8e0e9;color:#637286}.lesson-complete-button.is-complete{background:var(--green);border-color:var(--green)}.lesson-content-meta{display:flex;flex-wrap:wrap;gap:8px 18px;border-top:1px solid var(--line);padding-top:18px;margin-top:40px;color:var(--muted);font-size:.76rem}.is-lesson-complete{position:relative}.is-lesson-complete:after{content:"已完成";display:inline-block;background:#e3f3ee;color:#167157;padding:4px 7px;font-size:.68rem;font-style:normal;font-weight:900;align-self:center}.linked-lessons .is-lesson-complete i,.path-list .is-lesson-complete .path-arrow{display:none}
.learning-toast{position:fixed;left:50%;bottom:24px;z-index:1000;transform:translate(-50%,30px);opacity:0;pointer-events:none;background:var(--navy);color:#fff;padding:12px 18px;box-shadow:var(--learning-shadow);transition:opacity .2s ease,transform .2s ease}.learning-toast.is-visible{opacity:1;transform:translate(-50%,0)}
.tool-hero{padding-top:68px;padding-bottom:70px;background:var(--navy);color:#fff}.tool-hero .crumb{display:flex;gap:8px;color:#aebdd0;font-size:.8rem;margin-bottom:35px}.tool-hero .crumb a{color:inherit}.tool-hero h1{font-family:Georgia,"Songti SC",serif;font-size:clamp(3rem,6vw,5.8rem);line-height:1.02;letter-spacing:-.055em;max-width:900px;margin-bottom:20px}.tool-hero h1 em{font-style:normal;color:#77adff}.tool-hero>p{color:#c5d0df;max-width:700px}.search-shell{padding-top:58px;padding-bottom:90px;max-width:1180px;margin:0 auto}.course-search-label{display:block;font-weight:900;margin-bottom:10px}.course-search-input{width:100%;height:58px;border:2px solid #7f93ab;background:#fff;color:var(--ink);font:700 1.05rem Arial,"Microsoft YaHei",sans-serif;padding:0 18px}.course-search-hint{display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:.85rem;margin:10px 0 30px}.search-results{display:grid;gap:12px}.search-result-card{display:grid;grid-template-columns:1fr 44px;gap:20px;align-items:center;border:1px solid var(--line);border-left:4px solid var(--blue);background:#fff;color:var(--ink);padding:21px 22px;text-decoration:none}.search-result-card:hover{border-color:var(--blue);box-shadow:0 8px 25px rgba(7,24,45,.07)}.search-result-card small{color:var(--orange);font-weight:900}.search-result-card h2{font-family:Georgia,"Songti SC",serif;font-size:1.5rem;margin:7px 0}.search-result-card p{color:var(--muted);margin:0 0 8px}.search-result-card span{font-size:.76rem;color:#637286}.search-result-card>b{font-size:1.5rem;color:var(--blue);text-align:center}.search-empty{background:#fff;border:1px solid var(--line);padding:34px}.search-empty h2{font-family:Georgia,"Songti SC",serif}
.dashboard-shell{padding-top:64px;padding-bottom:96px}.dashboard-summary{display:grid;grid-template-columns:1fr minmax(320px,.75fr);gap:60px;align-items:center;background:#fff;border-top:4px solid var(--blue);padding:30px 34px;box-shadow:var(--learning-shadow)}.dashboard-summary h2{font-family:Georgia,"Songti SC",serif;font-size:clamp(2rem,3.5vw,3.2rem);margin-bottom:10px}.dashboard-summary p{color:var(--muted);margin:0}.dashboard-summary>div:last-child>strong{display:block;font-size:2.2rem;margin-bottom:14px}.dashboard-summary .primary-button{max-width:100%;overflow-wrap:anywhere}.dashboard-modules{margin-top:64px}.dashboard-modules>h2,.dashboard-library h2,.dashboard-data h2{font-family:Georgia,"Songti SC",serif;font-size:2rem}.dashboard-modules{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.dashboard-modules>h2{grid-column:1/-1}.dashboard-modules article{background:#fff;border:1px solid var(--line);padding:20px}.dashboard-modules article>div:first-child{display:flex;justify-content:space-between;gap:12px}.dashboard-modules small{font-weight:900;color:var(--orange)}.mini-progress{height:7px;background:#d8e0e9;margin:14px 0}.mini-progress i{display:block;height:100%;background:var(--green)}.dashboard-modules article>a{display:grid;grid-template-columns:30px 1fr;gap:8px;color:var(--ink);text-decoration:none;border-top:1px solid var(--line);padding:10px 0;font-size:.86rem}.dashboard-modules article>a>span{color:var(--orange);font-weight:900}.dashboard-modules article>a.is-done>span{color:var(--green)}.dashboard-library{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:54px}.dashboard-library>div{background:#fff;border:1px solid var(--line);padding:24px}.dashboard-list>a{display:block;color:var(--ink);text-decoration:none;border-top:1px solid var(--line);padding:13px 0}.dashboard-list>a strong,.dashboard-list>a span{display:block}.dashboard-list>a span{color:var(--muted);font-size:.83rem;margin-top:4px}.empty-state{color:var(--muted)}.dashboard-data{display:flex;justify-content:space-between;align-items:center;gap:28px;background:#e7edf3;padding:26px 28px;margin-top:36px}.dashboard-data h2{font-size:1.5rem;margin-bottom:6px}.dashboard-data p{color:var(--muted);margin:0}.dashboard-data>div:last-child{display:flex;gap:9px;flex-wrap:wrap}.import-label{position:relative}.import-label input{position:absolute;inset:0;opacity:0;cursor:pointer}.dashboard-data .danger-button{border-color:#a53e25;color:#a53e25}
@media(max-width:1000px){.site-header nav .learning-nav-link{display:none}.home-learning-status,.dashboard-summary{grid-template-columns:1fr;gap:28px}.dashboard-modules{grid-template-columns:1fr 1fr}.dashboard-data{display:block}.dashboard-data>div:last-child{margin-top:18px}}
@media(max-width:680px){.home-learning-status{grid-template-columns:1fr;gap:24px;padding-top:42px;padding-bottom:44px}.learning-status-panel{padding:20px}.learning-tools{padding:18px 16px;margin-top:-24px}.learning-tools-head{display:block}.learning-tools-head>span{display:block;margin-top:7px}.learning-tool-actions{display:grid}.tool-button{width:100%}.lesson-quiz{padding:22px 17px;margin:42px 0}.quiz-question label{padding:12px 10px}.lesson-content-meta{display:block}.lesson-content-meta span{display:block;margin-bottom:6px}.tool-hero{padding-top:48px;padding-bottom:54px}.tool-hero h1{font-size:clamp(2.55rem,12vw,3.25rem)}.search-shell{padding-top:42px}.course-search-hint{display:block}.course-search-hint span{display:block;margin-top:6px}.search-result-card{padding:18px 16px}.dashboard-shell{padding-top:42px}.dashboard-summary{padding:22px 18px}.dashboard-modules{grid-template-columns:1fr}.dashboard-library{grid-template-columns:1fr}.dashboard-data{padding:22px 18px}.dashboard-data>div:last-child{display:grid}.dashboard-data button,.import-label{width:100%}.is-lesson-complete:after{display:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}