:root{--bg:#f4f7f6;--card:#ffffff;--line:#e7ecf0;--line-light:#eef2f5;--text:#0f172a;--muted:#64748b;--primary:#0d9488;--primary-hover:#0f766e;--primary-soft:#e6f6f6;--ok:#16a34a;--ok-bg:#ecfdf3;--warn:#d97706;--warn-bg:#fff7ed;--danger:#e11d48;--danger-bg:#fff1f3;--radius-card:12px;--radius-ctl:8px;--shadow-sm:0 1px 2px rgba(15,23,42,0.04),0 2px 8px rgba(15,23,42,0.04);--shadow-md:0 2px 4px rgba(15,23,42,0.05),0 10px 28px rgba(15,23,42,0.07)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);padding:16px 20px;margin-bottom:16px}.card h2{margin:0 0 12px;font-size:16px}.card h3{margin:12px 0 8px}.btn,.card h3{font-size:14px}.btn{display:inline-block;height:34px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-ctl);background:#fff;color:var(--text);cursor:pointer;line-height:32px}.btn:hover{color:var(--primary)}.btn-primary,.btn:hover{border-color:var(--primary)}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);color:#fff}.btn-danger:hover{border-color:var(--danger);color:var(--danger)}.btn-sm{height:26px;padding:0 10px;line-height:24px;font-size:12px}.btn:disabled{opacity:.5;cursor:not-allowed}.tab-btn{height:34px;padding:0 14px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted,#6b7280);font-size:14px;cursor:pointer;line-height:32px}.tab-btn-active{border-color:var(--primary);color:var(--primary);background:var(--primary-soft);font-weight:600}input,select,textarea{height:34px;border:1px solid var(--line);border-radius:var(--radius-ctl);padding:0 10px;font-size:14px;background:#fff;color:var(--text)}textarea{height:auto;padding:8px 10px;line-height:1.5}input:focus,select:focus{outline:none;border-color:var(--primary)}.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-weight:500;white-space:nowrap}td.t-center{text-align:center}.badge{display:inline-block;padding:1px 8px;border-radius:10px;font-size:12px;white-space:nowrap}.badge-draft{background:#f1f5f9;color:var(--muted)}.badge-reviewing{background:var(--warn-bg);color:var(--warn)}.badge-published{background:var(--ok-bg);color:var(--ok)}.badge-deprecated{background:var(--danger-bg);color:var(--danger)}.badge-real{background:var(--primary-soft);color:var(--primary)}.badge-mock{background:#f2f3f5;color:var(--muted)}.badge-free{background:var(--ok-bg);color:var(--ok)}.badge-owned{background:var(--primary-soft);color:var(--primary)}.badge-member{background:#fdf3d8;color:#b8860b}.badge-preview{background:#f2f3f5;color:var(--muted)}.badge-price{background:#ffece8;color:var(--danger);font-weight:600}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:12px;gap:12px;margin-top:12px}.course-card{display:block;color:inherit;text-decoration:none}.course-card:hover{border-color:var(--primary)}.course-card-title{font-weight:600;font-size:15px;margin-bottom:4px}.course-card-summary{font-size:13px;margin:6px 0;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.course-card-meta{display:flex;gap:8px;align-items:center;margin-top:4px}.episode-list{display:flex;flex-direction:column;gap:4px}.episode-row{display:flex;gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:8px}.episode-locked{background:#fafbfc}.episode-no{width:26px;height:26px;border-radius:50%;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;flex:none}.episode-locked .episode-no{background:var(--muted)}.plan-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));grid-gap:10px;gap:10px}.plan-card{border:1px solid var(--line);border-radius:10px;padding:12px;text-align:center;display:flex;flex-direction:column;gap:4px;align-items:center}.plan-name{font-weight:600}.plan-months{font-size:12px;color:var(--muted)}.plan-price{font-size:20px;font-weight:700;color:var(--danger)}.modal-mask{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;padding:16px}.modal-box{width:360px;max-width:100%}.paywall-box{margin:16px 0;padding:32px 16px;border:1px dashed var(--line);border-radius:10px;text-align:center;display:flex;flex-direction:column;gap:10px;align-items:center}.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table td,.data-table th{padding:8px 10px;text-align:left;border-bottom:1px solid var(--line)}.admin-shell{min-height:100vh}.admin-nav{display:flex;align-items:center;gap:20px;background:#fff;border-bottom:1px solid var(--line);padding:0 24px;height:52px}.admin-nav .spacer{flex:1 1}.admin-main{max-width:1200px;margin:0 auto;padding:20px 24px}.muted{color:var(--muted);font-size:12px}.error-text{color:var(--danger)}.ok-text{color:var(--ok)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-box{width:360px}.login-box h1{font-size:20px;margin:0 0 4px}.tree-item{display:flex;align-items:center;gap:8px;padding:4px 0}.tree-item .del{margin-left:auto}.pager{display:flex;gap:8px;align-items:center;margin-top:12px}.import-result{margin-top:12px;padding:10px 12px;background:#fafbfc;border-radius:8px}.import-result ul{margin:6px 0 0;padding-left:18px}.spacer{flex:1 1}.material-box{background:#f7f8fa;border:1px dashed var(--line);border-radius:8px;padding:10px 12px;margin-top:12px;white-space:pre-wrap;color:#4e5969}.q-options{margin-top:12px;display:flex;flex-direction:column;gap:8px}.q-option{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);border-radius:8px;padding:10px 12px;cursor:pointer;background:#fff}.q-option.selected,.q-option:hover{border-color:var(--primary)}.q-option.selected{background:var(--primary-soft)}.q-option.correct{border-color:var(--ok);background:#e8ffea;cursor:default}.q-option.wrong{border-color:var(--danger);background:#ffece8;cursor:default}.q-key{flex:none;width:22px;height:22px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:600}.analysis-box{background:#fafbfc;border-left:3px solid var(--primary);border-radius:6px;padding:10px 12px;margin-top:12px;font-size:14px}.analysis-box.ok-border{border-left-color:var(--ok)}.lang-switcher{display:inline-flex;align-items:center;gap:4px}.lang-switcher select{height:26px;padding:0 6px;font-size:12px;border-radius:6px;cursor:pointer}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.link-btn{background:none;border:none;padding:0;color:var(--primary);font-size:14px;cursor:pointer}.link-btn:hover{text-decoration:underline}button.q-option{width:100%;text-align:left;font:inherit;color:inherit}.q-option .q-text{flex:1 1}.opt-mark{flex:none;margin-left:auto;font-weight:700;color:var(--ok)}.opt-mark.wrong{color:var(--danger)}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}@media (max-width:640px){.admin-main{padding:12px}.card{padding:12px 14px}.admin-nav{padding:0 12px;gap:12px;overflow-x:auto}.admin-nav .brand{font-size:14px;white-space:nowrap}.filters{gap:8px}.filters input,.filters select{max-width:44vw}.q-option{padding:8px 10px}.table-wrap table{font-size:13px}.course-grid{grid-template-columns:1fr}.plan-grid{grid-template-columns:repeat(2,1fr)}.episode-row{flex-wrap:wrap;padding:10px}.episode-row>div:last-child{width:100%;display:flex;justify-content:flex-end}.player-video{min-height:220px;max-height:56vw}.login-box,.modal-box{width:100%}.data-table td,.data-table th{padding:6px}}.book-filters{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.book-cat-title{margin:20px 0 10px;font-size:15px}.book-item{display:flex;flex-direction:column;gap:6px;padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:var(--card);margin-bottom:10px}.book-title-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.book-title-row strong{font-size:15px}.book-desc{color:var(--text)}.book-actions{display:flex;gap:8px;margin-top:4px}.reader-card{padding:12px}.reader-frame{width:100%;height:calc(100vh - 220px);min-height:480px;border:1px solid var(--line);border-radius:8px;background:#fff}.reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px}.reader-epub{height:calc(100vh - 260px);min-height:440px;overflow:hidden}.reader-epub,.reader-txt{width:100%;border:1px solid var(--line);border-radius:8px;background:#fff}.reader-txt{height:calc(100vh - 220px);min-height:480px;overflow:auto;padding:16px;margin:0;white-space:pre-wrap;font-size:14px}.video-title-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}.player-box{position:relative;background:#000;border-radius:8px;overflow:hidden}.player-video{display:block;width:100%;max-height:calc(100vh - 200px);min-height:360px;background:#000}.player-box:-webkit-full-screen .player-video{max-height:100vh}.player-box:fullscreen .player-video{max-height:100vh}.player-toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:10px}.player-toolbar select{height:28px;padding:0 6px;font-size:13px}.video-wm{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:5}.video-wm-item{position:absolute;top:0;left:0;white-space:nowrap;-webkit-user-select:none;-moz-user-select:none;user-select:none;will-change:transform,opacity;opacity:0;font-weight:500;letter-spacing:1px;color:rgba(255,255,255,.32);text-shadow:0 0 3px rgba(0,0,0,.55),0 1px 2px rgba(0,0,0,.5)}.upload-progress{margin-top:10px;height:8px;border-radius:4px;background:#f2f3f5;overflow:hidden}.upload-progress-bar{height:100%;background:var(--primary);transition:width .2s}.challenge-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));grid-gap:10px;gap:10px;margin-top:8px}.level-card{aspect-ratio:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;border:1px solid var(--line);border-radius:10px;background:var(--card);cursor:pointer;transition:all .2s;padding:4px}.level-card:hover:not(:disabled){border-color:var(--primary);transform:translateY(-2px)}.level-card .lv-num{font-size:20px;font-weight:700}.level-card .lv-stars{color:#f5b301;font-size:13px;letter-spacing:2px}.level-card.current{border-color:var(--primary);box-shadow:0 0 0 2px rgba(47,111,237,.15)}.level-card.completed{border-color:var(--ok)}.level-card:disabled{opacity:.45;cursor:not-allowed}.diff-options{display:inline-flex;gap:6px;flex-wrap:wrap}.diff-option{height:28px;padding:0 10px;border:1px solid var(--line);border-radius:14px;background:var(--card);cursor:pointer;font-size:12px;transition:all .15s}.diff-option.active{border-color:var(--primary);color:var(--primary);background:#e8f3ff}.lives{font-size:16px;letter-spacing:2px;white-space:nowrap}.streak-badge{color:var(--warn);font-weight:600;white-space:nowrap}.result-stars{font-size:46px;text-align:center;color:#f5b301;letter-spacing:10px;margin:12px 0;animation:starPop .5s ease}@keyframes starPop{0%{transform:scale(.3);opacity:0}70%{transform:scale(1.15)}to{transform:scale(1);opacity:1}}.stack{display:flex;flex-direction:column;gap:14px}.page-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}.page-head h1{margin:0 0 4px;font-size:22px}.head-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.input{padding:8px 10px;border:1px solid var(--line,#d8ded9);border-radius:7px;font-size:14px;font-family:inherit;background:#fff;width:100%;box-sizing:border-box}.input:focus{outline:2px solid color-mix(in srgb,var(--primary) 20%,transparent);border-color:var(--primary)}.panel{border:1px solid var(--line,#dce7e4);border-radius:9px;padding:16px;background:#fff}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:12px;gap:12px}.card{border:1px solid var(--line,#dce7e4);border-radius:9px;padding:14px;background:#fff}.card-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px}.card-head h3{margin:0;font-size:15px}.alert{border-radius:8px;padding:10px 12px;font-size:13px;display:flex;gap:8px;align-items:center;justify-content:space-between}.alert-error{background:#fdeceb;color:#8a2c21;border:1px solid #f3c4bf}.alert-info{background:#e8f4ef;color:#1d5c4d;border:1px solid #c3e4d9}.prewrap{white-space:pre-wrap;margin:0 0 6px}.clamp{display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.small{font-size:12px}.soap-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}.field-grid label,.soap-grid label{font-size:12px;color:#5f7772;display:block;margin-bottom:4px}.field-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));grid-gap:10px;gap:10px}@media (max-width:800px){.soap-grid{grid-template-columns:1fr}}.doc-head{border-bottom:2px solid var(--primary);padding-bottom:8px}.doc-head h2{margin:0;font-size:18px;color:var(--primary)}.vitals-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr))}.vital-cell{border:1px solid #dce7e4;border-radius:7px;padding:6px 10px;display:flex;flex-direction:column;gap:2px;background:#f6faf8}.rx-table{width:100%;border-collapse:collapse;font-size:13px}.rx-table td,.rx-table th{border:1px solid #dce7e4;padding:6px 8px;text-align:left}.case-doc textarea.input{line-height:1.6}@media print{.admin-nav,.no-print{display:none!important}body{background:#fff}.case-doc{border:none;padding:0}.soap-grid{grid-template-columns:1fr 1fr}textarea.input{border:none;resize:none;overflow:hidden;height:auto;min-height:120px}}.stage-strip{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid #dce7e4;padding-bottom:10px}.stage-cell{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;border:1px solid #dce7e4;background:#fff;cursor:pointer;font-size:13px;color:#41564f}.stage-cell.active,.stage-cell:hover{border-color:var(--primary)}.stage-cell.active{background:var(--primary);color:#fff;font-weight:600}.course-blocks{display:flex;flex-direction:column;gap:14px}.course-block-heading{margin:6px 0 0;font-size:19px;color:var(--text);border-left:4px solid var(--primary);padding-left:10px}.course-block-text{font-size:15px;line-height:1.85;color:var(--text);white-space:pre-wrap}.course-block-text p{margin:0 0 10px}.course-block-figure{margin:0}.course-block-figure img{border-radius:10px;border:1px solid #e3ece9;max-width:100%}.course-block-figure figcaption{font-size:13px;margin-top:6px}.course-block-video video{max-width:100%}.course-block-audio audio{height:40px}.course-block-link{display:flex;flex-direction:column;gap:2px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--primary-soft);text-decoration:none}.course-block-link:hover{border-color:var(--primary)}.course-block-link-title{font-weight:600;color:var(--primary)}.course-block-link-note{font-size:13px;color:var(--muted)}.course-block-divider{border:none;border-top:1px dashed var(--line);margin:4px 0}.trim-modal-mask{position:fixed;inset:0;background:rgba(8,24,20,.45);display:flex;align-items:center;justify-content:center;z-index:60}.trim-modal{width:min(720px,92vw);max-height:90vh;overflow:auto}.trim-row{display:flex;align-items:center;gap:8px;margin:10px 0;font-size:14px}.trim-row input[type=range]{flex:1 1;height:auto}.continue-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));grid-gap:10px;gap:10px}.continue-card{display:flex;flex-direction:column;gap:4px;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--card);text-decoration:none;color:inherit}.continue-card:hover{border-color:var(--primary);box-shadow:var(--shadow-sm)}.continue-title{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.continue-bar{display:block;height:4px;border-radius:2px;background:var(--line-light);overflow:hidden}.continue-bar span{display:block;height:100%;background:var(--primary);border-radius:2px}.video-progress-line{display:block;height:3px;border-radius:2px;background:var(--line-light);overflow:hidden;margin:6px 0 2px}.video-progress-line span{display:block;height:100%;background:var(--primary)}.outline-box{white-space:pre-wrap;line-height:1.8;font-size:14px;color:var(--text);background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-ctl);padding:12px 14px}.admin-nav .brand{font-weight:700;font-size:16px;color:var(--primary)}.admin-nav a{color:var(--muted);font-size:14px}.admin-nav a:hover{color:var(--primary);text-decoration:none}.admin-nav a.active{color:var(--primary);font-weight:600;border-bottom:2px solid var(--primary);padding-bottom:2px}