:root{--ink:#1e2a36;--muted:#738294;--border:#e6ebef;--subtle:#f5f7fa;--navy:#202c43;--mint:#dff3ed;--teal:#087e73;--bg:#fbfcfd;--white:#fff;--font:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.6 var(--font)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #91d2c7;outline-offset:2px}::selection{background:#cdebe1} [hidden]{display:none!important}
.app-shell{display:flex;min-height:100vh}.sidebar{width:260px;min-width:260px;position:sticky;top:0;height:100vh;background:#fff;border-right:1px solid var(--border);display:flex;flex-direction:column;padding:31px 16px 23px;z-index:30}.brand{display:flex;gap:12px;align-items:center;padding:1px 12px 35px}.brand-symbol{width:37px;height:37px;border-radius:12px;background:#e1f3ec;display:flex;gap:3px;justify-content:center;align-items:center;transform:rotate(-8deg)}.brand-symbol span{width:5px;height:19px;border-radius:3px;background:#247e70}.brand-symbol span:first-child{height:14px;background:#60b3a0}.brand-symbol span:last-child{height:24px;background:#154e64}.brand-copy{display:flex;flex-direction:column;line-height:1.1}.brand-copy strong{font-size:18px;font-weight:750;letter-spacing:.3px}.brand-copy small{font-size:10px;letter-spacing:2.6px;color:#7d8995;margin-top:5px}.sidebar-heading{padding:0 15px;color:#9aa4b0;font-weight:750;font-size:11px;letter-spacing:1.2px;margin-bottom:12px}.course-heading{margin-top:35px}.nav-item{width:100%;border:0;background:transparent;display:flex;align-items:center;gap:12px;text-align:left;border-radius:11px;color:#5b6675;padding:12px 13px;min-height:46px;font-weight:580;margin-bottom:5px}.nav-item:hover{background:#f6f8fa}.nav-item.active{background:#e9f5f1;color:#087767;font-weight:750}.nav-icon{width:21px;height:21px;display:grid;place-items:center;font-size:17px;font-weight:550}.nav-count{margin-left:auto;font-size:12px;color:#919ba7;font-weight:650}.nav-item.active .nav-count{color:#087767}.course-dot{width:23px;height:23px;flex:none;display:grid;place-items:center;border-radius:7px;background:var(--course);color:white;font-size:12px;font-weight:800}.course-identifier{font-size:13px}.sidebar-foot{margin-top:auto;border:1px solid #e7ecef;border-radius:14px;background:#f7faf9;padding:16px 17px 14px}.tip-mark{font-size:21px;color:#14877a;margin-bottom:5px}.sidebar-foot strong{display:block;font-size:13px}.sidebar-foot p{color:#738294;font-size:12px;line-height:1.65;margin:7px 0 13px}.sidebar-foot a{font-size:12px;font-weight:700;color:#087b72}.sidebar-caption{font-size:9px;color:#adb6c0;letter-spacing:1.5px;text-align:center;padding-top:20px}
.app-main{min-width:0;flex:1;display:flex;flex-direction:column}.topbar{height:78px;min-height:78px;display:flex;align-items:center;gap:20px;padding:0 clamp(25px,4.5vw,72px);border-bottom:1px solid var(--border);background:rgba(255,255,255,.92);position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}.top-search{background:#f6f8fa;border:1px solid #e9edf1;border-radius:10px;max-width:510px;flex:1;display:flex;align-items:center;gap:11px;color:#8491a1;padding:0 14px;height:43px}.top-search:focus-within{border-color:#8ecabb;box-shadow:0 0 0 3px #e2f5ef}.top-search input{border:0;outline:0!important;min-width:0;background:transparent;flex:1;font-size:13px;color:#273746}.top-search input::placeholder{color:#a0aab5}.top-search kbd{font:12px var(--font);border:1px solid #e1e6ec;border-radius:5px;padding:1px 6px;color:#9ba5b1;background:#fff}.topbar-label{margin-left:auto;color:#8c98a7;font-size:12px}.topbar-help{height:28px;width:28px;border-radius:50%;border:1px solid #dee5eb;display:grid;place-items:center;color:#8691a0;font-weight:700}.topbar-help:hover{color:#087e73;border-color:#8bccc0}.mobile-menu{display:none!important}.icon-button{border:0;background:none;color:#647185}
.content{width:100%;max-width:1490px;margin:0 auto;padding:40px clamp(25px,4.5vw,72px) 65px;flex:1}.eyebrow{font-size:11px;font-weight:800;letter-spacing:2.2px;color:var(--teal);margin:0 0 12px}.hero{position:relative;background:#eaf4f1;overflow:hidden;padding:42px 45px 44px;border-radius:20px;min-height:250px}.hero:before{content:"";width:365px;height:365px;position:absolute;right:-67px;top:-95px;border:1px solid #c6e4d9;border-radius:50%;box-shadow:0 0 0 46px #d9eee6,0 0 0 47px #c5e3d8,0 0 0 95px #e1f3ed,0 0 0 96px #c5e4d9;opacity:.8}.hero:after{content:"";position:absolute;right:104px;top:62px;width:112px;height:150px;border-radius:12px;background:linear-gradient(133deg,#318d79,#1f5d6b);transform:rotate(13deg);box-shadow:12px 14px 0 rgba(17,98,83,.12)}.hero h1{font-size:clamp(25px,3.2vw,38px);line-height:1.32;letter-spacing:-.9px;margin:0 0 13px;max-width:650px;font-weight:780;position:relative;z-index:1}.hero p{color:#547369;font-size:14px;max-width:520px;line-height:1.8;margin:0;position:relative;z-index:1}.hero .eyebrow{position:relative;z-index:1}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:23px}.stat{border:1px solid var(--border);background:#fff;border-radius:14px;padding:19px 22px}.stat .n{font-size:27px;font-weight:790;letter-spacing:-.5px;display:block;line-height:1.3}.stat .t{font-size:12px;color:#8793a1}.section-head{display:flex;align-items:end;justify-content:space-between;gap:15px;margin:38px 0 19px}.section-head h2{font-size:20px;line-height:1.4;margin:0;font-weight:760;letter-spacing:-.4px}.section-head p{font-size:12px;color:#8694a1;margin:4px 0 0}.text-link{font-size:12px;font-weight:730;color:#167d70}.course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.course-card{border:1px solid var(--border);background:#fff;border-radius:16px;padding:25px 25px 22px;min-height:212px;display:flex;flex-direction:column;position:relative;overflow:hidden;text-align:left;transition:transform .18s ease,border .18s ease,box-shadow .18s ease}.course-card:hover{transform:translateY(-3px);border-color:#cfded9;box-shadow:0 12px 32px rgba(25,50,65,.07)}.course-card:after{content:"";position:absolute;right:-33px;top:-34px;width:155px;height:155px;border-radius:50%;background:var(--accent);opacity:.065}.course-id{font-size:11px;font-weight:850;color:var(--accent);letter-spacing:1px}.course-card h3{font-size:21px;margin:12px 0 5px;line-height:1.4;font-weight:760}.course-card .english{font-size:12px;color:#97a1af}.course-card-bottom{display:flex;align-items:center;gap:15px;margin-top:auto;padding-top:20px;font-size:12px;color:#718093}.course-card-bottom span:last-child{margin-left:auto;border:1px solid #e5ebef;border-radius:50%;width:27px;height:27px;display:grid;place-items:center;color:#667a81}.course-card:hover .course-card-bottom span:last-child{background:#e7f3ed;border-color:#bddfd3;color:#08776b}.recent-list{display:flex;flex-direction:column;gap:10px}.recent-item{display:flex;align-items:center;gap:15px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:10px 15px;text-align:left;min-width:0}.recent-item:hover{border-color:#bbd8ce;background:#fcfefd}.recent-cover{width:74px;height:52px;border-radius:7px;overflow:hidden;flex:none;background:#edf0f3}.recent-cover img{width:100%;height:100%;object-fit:cover}.recent-name{min-width:0;flex:1}.recent-name strong{display:block;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-name small{color:#8e9baa;font-size:11px}.recent-arrow{color:#8897a1;margin-left:auto;padding:0 3px}
.crumbs{display:flex;gap:9px;align-items:center;color:#8e99a7;font-size:12px;margin:0 0 25px;flex-wrap:wrap}.crumbs a{color:#728395}.crumbs a:hover{color:#0b8271}.crumbs .sep{color:#c5cbd3}.page-heading{display:flex;align-items:flex-start;gap:20px;justify-content:space-between;margin:0 0 21px}.page-heading h1{font-size:30px;line-height:1.35;margin:5px 0 8px;letter-spacing:-.5px;font-weight:790}.page-heading .subtitle{color:#83909b;font-size:13px}.outline-button{border:1px solid #dde5e9;border-radius:10px;background:#fff;padding:10px 15px;display:inline-flex;align-items:center;gap:8px;color:#536575;font-weight:700;font-size:12px}.outline-button:hover{border-color:#a2d3c9;color:#0e8073}.course-banner{border-radius:16px;background:linear-gradient(110deg,#f4f7fa,#fdfefe);border:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 25px;margin:25px 0}.course-banner .big-id{font-size:25px;font-weight:850;color:var(--accent)}.course-banner p{font-size:12px;color:#82909c;margin:3px 0 0}.course-banner .pills{display:flex;flex-wrap:wrap;gap:7px}.pill{display:inline-flex;background:#edf1f5;color:#718092;border-radius:7px;padding:5px 9px;font-size:11px;font-weight:700}.deck-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.deck-card{background:#fff;border:1px solid var(--border);border-radius:14px;overflow:hidden;cursor:pointer;display:flex;flex-direction:column;min-width:0;transition:box-shadow .2s,transform .2s}.deck-card:hover{box-shadow:0 10px 27px rgba(22,44,56,.09);transform:translateY(-3px)}.deck-thumb{height:155px;display:grid;place-items:center;background:#f2f5f7;overflow:hidden;position:relative}.deck-thumb img{width:100%;height:100%;object-fit:contain;transition:transform .25s}.deck-card:hover .deck-thumb img{transform:scale(1.035)}.deck-type{position:absolute;right:10px;top:10px;color:#455b6c;background:rgba(255,255,255,.96);font-size:10px;padding:4px 8px;border-radius:5px;font-weight:800}.deck-meta{padding:17px;flex:1;display:flex;flex-direction:column}.deck-meta strong{font-size:14px;line-height:1.6;overflow-wrap:anywhere}.deck-meta small{font-size:11px;color:#9ca6b1;margin-top:auto;padding-top:10px}.deck-meta .deck-bottom{margin-top:10px;display:flex;align-items:center;justify-content:space-between;color:#728191;font-size:11px}.filter-bar{display:flex;gap:11px;align-items:center;justify-content:space-between;margin:22px 0 20px;flex-wrap:wrap}.filter-bar .summary{font-size:12px;color:#8b97a2}.filter-bar select{background:#fff;border:1px solid #dfe7eb;border-radius:9px;padding:9px 12px;color:#607082;max-width:200px;outline:none}.pages-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.page-card{background:#fff;border:1px solid #e4e9ed;border-radius:12px;overflow:hidden;cursor:pointer;min-width:0;text-align:left;transition:border .16s,transform .16s,box-shadow .16s}.page-card:hover{border-color:#90c5ba;transform:translateY(-2px);box-shadow:0 7px 20px rgba(26,68,72,.06)}.page-image{width:100%;aspect-ratio:16/10;background:#f0f2f5;display:grid;place-items:center;overflow:hidden}.page-image img{width:100%;height:100%;object-fit:contain}.page-meta{padding:12px 13px 14px}.page-meta .page-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:5px}.page-number{font-size:11px;font-weight:800;color:#2a8d7a}.page-title{font-size:12px;color:#3f5160;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:35px}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;flex:none;background:#dba05c}.status-dot.text{background:#3eae8c}.status-dot.risk{background:#df9a66}.status-dot.focus{background:#6f75d5}.status-dot.image{background:#9daab5}.load-more{display:block;margin:28px auto 0;background:#fff;border:1px solid #d9e4e2;border-radius:10px;padding:11px 29px;color:#147a70;font-weight:700}.load-more:hover{background:#eef8f5}.search-result-head{display:flex;gap:9px;align-items:center;justify-content:space-between;flex-wrap:wrap}.search-result-head p{font-size:12px;color:#8f9ba6}.search-empty,.empty-state{text-align:center;background:white;border:1px solid var(--border);border-radius:16px;padding:55px 20px;color:#81909e}.empty-state .symbol{font-size:35px;margin-bottom:10px}.empty-state h3{color:#344453;font-size:18px;margin:0 0 5px}.empty-state p{margin:0}.search-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.search-hit{border:1px solid var(--border);background:white;border-radius:11px;display:flex;align-items:center;gap:13px;padding:12px;cursor:pointer;text-align:left;min-width:0}.search-hit:hover{border-color:#a9d5ca}.search-hit img{width:94px;aspect-ratio:16/10;background:#f4f6f8;object-fit:contain;border-radius:5px}.search-hit div{min-width:0}.search-hit strong{font-size:12px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.search-hit small{font-size:11px;color:#8695a3}.search-hit p{font-size:11px;color:#8996a3;margin:5px 0 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.note{border-left:3px solid #94c7b9;background:#f3f9f6;border-radius:0 9px 9px 0;padding:12px 15px;font-size:12px;color:#597a70;margin:16px 0}.page-footer{padding:20px clamp(25px,4.5vw,72px);border-top:1px solid var(--border);background:#fff;color:#a0abb5;font-size:10px;display:flex;justify-content:space-between;gap:20px}
.viewer{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:24px}.viewer-backdrop{position:absolute;inset:0;background:rgba(12,21,34,.72);backdrop-filter:blur(3px)}.viewer-window{position:relative;background:#fff;border-radius:16px;width:min(1240px,100%);max-height:96vh;display:flex;flex-direction:column;box-shadow:0 25px 80px #0004;overflow:hidden}.viewer-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e9edf1;padding:14px 21px;gap:20px}.viewer-heading{min-width:0;display:flex;flex-direction:column}.viewer-heading span{font-size:10px;color:#6f8e85;font-weight:800}.viewer-heading strong{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.viewer-actions{display:flex;gap:10px;flex:none}.small-button{background:#f7f9fa;border:1px solid #e3e8ed;padding:8px 11px;border-radius:8px;font-size:11px;font-weight:750;color:#536777}.small-button:hover{background:#e7f4ef;color:#0b766b}.viewer-body{flex:1;min-height:0;background:#e8ebee;display:flex;align-items:stretch;position:relative;overflow:hidden}.viewer-image-wrap{height:min(70vh,790px);width:100%;display:flex;justify-content:center;align-items:center;padding:10px 45px}.viewer-image-wrap img{max-width:100%;max-height:100%;object-fit:contain;box-shadow:0 3px 20px #0002}.viewer-fallback{padding:50px;color:#8693a1}.slide-arrow{position:absolute;top:50%;transform:translateY(-50%);border:0;border-radius:50%;background:#fff;color:#667787;width:36px;height:36px;font-size:25px;z-index:2;box-shadow:0 2px 10px #0002}.slide-arrow:hover{background:#daf0e7}.slide-arrow.left{left:13px}.slide-arrow.right{right:13px}.viewer-foot{padding:11px 22px;display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap}.viewer-info,.viewer-nav{display:flex;align-items:center;gap:12px;color:#8b96a1;font-size:11px}.state-pill{font-size:10px;padding:3px 8px;border-radius:5px;background:#edf5f0;color:#318473;font-weight:750}.text-button{border:0;background:transparent;color:#217d71;font-weight:750;font-size:11px}.viewer-excerpt{padding:15px 22px;max-height:180px;overflow:auto;white-space:pre-wrap;background:#f7f9fa;border-top:1px solid #e3e9ed;font-size:12px;color:#4c5b67}
.loading{text-align:center;color:#97a3ae;padding:100px 20px}.loader{height:24px;width:24px;border-radius:50%;border:3px solid #d0ebe1;border-top-color:#138b75;animation:spin .8s linear infinite;margin:0 auto 15px}@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:1200px){.pages-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.deck-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:920px){.sidebar{position:fixed;transform:translateX(-100%);transition:transform .2s}.sidebar.open{transform:translateX(0)}.sidebar-backdrop:not([hidden]){position:fixed;inset:0;background:#0007;z-index:25}.mobile-menu{display:inline-flex!important}.topbar-label{display:none}.content{padding-top:28px}.pages-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:620px){.topbar{height:66px;min-height:66px;padding:0 15px;gap:10px}.top-search{height:40px}.top-search kbd{display:none}.content{padding:20px 16px 45px}.hero{padding:30px 23px;min-height:230px}.hero:before{right:-260px}.hero:after{right:-18px;top:135px;width:49px;height:67px}.hero h1{font-size:27px}.course-grid,.deck-grid,.search-results{grid-template-columns:1fr}.stats{gap:9px}.stat{padding:14px 10px}.stat .n{font-size:22px}.page-heading h1{font-size:24px}.pages-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.page-meta{padding:9px}.page-title{font-size:11px}.page-footer{display:block;padding:17px}.page-footer span{display:block}.course-card{min-height:180px}.viewer{padding:8px}.viewer-image-wrap{height:min(66vh,680px);padding:6px 15px}.slide-arrow{height:30px;width:30px;font-size:20px}.slide-arrow.left{left:4px}.slide-arrow.right{right:4px}.viewer-head{padding:10px}.viewer-foot{padding:9px;gap:5px}.viewer-heading strong{max-width:180px}.viewer-actions a{display:none}}