@charset "UTF-8";
:root{color-scheme:light;--bg:#f6f7f4;--panel:#fff;--text:#24352f;--muted:#78817b;--line:#e5e9e3;--green:#3b6552;--green-soft:#edf3ed;--orange:#ab7c46;--sidebar:#fbfcf9;--shadow:0 8px 30px #203d2d05;--serif:"Noto Serif SC","Source Han Serif SC","SimSun",serif}
*{box-sizing:border-box}body{margin:0;color:var(--text);background:var(--bg);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-size:14px;line-height:1.65}button,input,textarea,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,textarea,select{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #96b8a3;outline-offset:3px}button{color:inherit}.skip{position:fixed;top:-60px;left:20px;background:var(--green);color:white;padding:10px;z-index:20}.skip:focus{top:8px}.layout{display:grid;grid-template-columns:238px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:var(--sidebar);border-right:1px solid var(--line);padding:32px 23px 22px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:11px;font-size:16px;font-weight:700;letter-spacing:.4px}.brand-icon{width:38px;height:38px;border-radius:10px;background:var(--green);color:white;display:grid;place-items:center;font-family:var(--serif);font-size:23px}.brand small{display:block;font-size:8px;letter-spacing:1.6px;color:var(--muted);font-weight:500;margin-top:1px}.subject{border:1px solid var(--line);border-radius:12px;padding:17px 17px 14px;margin:35px 0 27px;background:var(--panel)}.eyebrow{font-size:10px;letter-spacing:1.2px;color:var(--muted);display:block}.subject strong{font-weight:600;font-size:16px;display:block;margin:9px 0 11px;line-height:1.7}.subject-dot{font-size:10px;color:var(--green);background:var(--green-soft);border-radius:20px;padding:3px 9px}.subject-dot:before{content:"";display:inline-block;background:#72977e;width:5px;height:5px;border-radius:50%;margin-right:6px}.sidebar nav{display:grid;gap:6px}.sidebar nav a{display:flex;align-items:center;padding:12px 14px;border-radius:9px;color:#6d7971;gap:12px;font-size:13px}.sidebar nav a>span{font-size:21px;line-height:1;width:21px;text-align:center;font-weight:400}.sidebar nav a.active{background:var(--green-soft);color:var(--green);font-weight:700}.sidebar nav a:hover{background:var(--green-soft)}.sidebar nav b{margin-left:auto;font-size:10px;min-width:20px;text-align:center;border-radius:5px;background:var(--panel);font-weight:500}.sidebar-foot{margin-top:auto;display:flex;gap:10px;align-items:center;border-top:1px solid var(--line);padding-top:20px;font-size:11px}.sidebar-foot small{display:block;font-size:10px;color:var(--muted);margin-top:2px}.mini-mark{font-size:11px;border:1px solid var(--line);padding:6px;border-radius:9px;color:var(--green)}.workspace{min-width:0}.topbar{height:77px;border-bottom:1px solid var(--line);padding:0 42px;display:flex;align-items:center;justify-content:space-between;background:var(--panel)}.breadcrumb{font-size:12px;color:var(--muted)}.breadcrumb span{margin:0 14px;color:#b4bbb6}.breadcrumb strong{font-weight:500;color:var(--text)}.top-actions{display:flex;align-items:center;gap:16px}.demo-badge{font-size:10px;letter-spacing:.5px;color:#8e754f;border:1px solid #e5dcc9;border-radius:5px;padding:2px 7px}.icon-button{border:0;background:transparent;font-size:22px;line-height:1;min-height:36px;min-width:36px;display:inline-grid;place-items:center}.avatar{width:30px;height:30px;background:#e9e6dc;color:#817156;border-radius:50%;display:grid;place-items:center;font-family:var(--serif);font-size:13px}.demo-notice{padding:9px 42px;background:#f2f1e8;color:#867954;font-size:11px;display:flex;gap:8px;align-items:center}.notice-dot{height:5px;width:5px;flex-shrink:0;border-radius:100%;background:#b19a60}.demo-notice button{border:0;background:none;color:inherit;text-decoration:underline;font-size:10px;margin-left:auto;white-space:nowrap}main{padding:35px 42px 25px;max-width:1550px;margin:auto}h1,h2,h3,p{margin-top:0}h1{font-family:var(--serif);font-size:27px;font-weight:600;letter-spacing:1px;margin-bottom:6px}h2{font-size:16px;font-weight:600;margin-bottom:0}h3{font-size:15px;font-weight:600;margin-bottom:9px}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}.intro p{font-size:12px;color:var(--muted);margin:0}.intro .date{text-align:right;font-size:11px;color:var(--muted)}.intro .date strong{font-size:12px;display:block;color:#5e6c62;font-weight:500}.hero{position:relative;border-radius:15px;overflow:hidden;background:#e8eee4;min-height:215px;padding:31px 34px;margin-bottom:22px}.hero .eyebrow{color:#75826b;font-size:10px;letter-spacing:2.3px}.hero h2{font-family:var(--serif);font-size:32px;letter-spacing:3px;font-weight:500;margin:11px 0 10px;color:#34513f}.hero p{font-size:12px;color:#6a7b66;max-width:360px;margin-bottom:18px}.hero-content{position:relative;z-index:1}.topography{position:absolute;right:0;top:-40px;width:52%;height:300px;opacity:.75;pointer-events:none}.hero-coordinate{position:absolute;right:22px;bottom:17px;font-size:8px;letter-spacing:2px;color:#83967c}.primary,.secondary,.ghost{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:38px;border-radius:7px;padding:7px 15px;font-size:12px;text-decoration:none}.primary{background:var(--green);color:white;border:1px solid var(--green)}.primary:hover{filter:brightness(1.08)}.secondary{border:1px solid var(--line);background:var(--panel);color:var(--text)}.ghost{border:0;background:transparent;color:var(--green);padding:5px 0;min-height:28px}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;margin:0 0 30px}.stat{background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:17px 20px;box-shadow:var(--shadow)}.stat-head{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted)}.stat-head span:last-child{color:#94a89b;font-size:18px}.stat strong{font-weight:500;display:block;font-size:29px;line-height:1.25;margin:8px 0 5px;font-variant-numeric:tabular-nums;letter-spacing:-1px}.stat small{font-size:10px;color:var(--muted)}.stat strong small{letter-spacing:0;font-size:11px;margin-left:5px;color:var(--muted)}.cols{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(250px,1fr);gap:23px}.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;gap:10px}.section-head a{font-size:11px;color:var(--muted)}.section-head .english{font-size:9px;color:#a2aaa4;letter-spacing:1px;margin-left:10px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:23px;box-shadow:var(--shadow)}.continue-card{display:flex;gap:20px;align-items:flex-start}.book-cover{width:72px;height:96px;background:#537263;border-radius:3px 7px 7px 3px;flex-shrink:0;padding:15px 10px;border-left:5px solid #395c4b;color:white;position:relative}.book-cover:after{content:"GIS";position:absolute;bottom:8px;right:9px;color:#a9beb0;letter-spacing:2px;font-size:14px}.book-cover span{font-family:var(--serif);font-size:12px;line-height:1.7}.tag{display:inline-block;font-size:10px;line-height:1.6;padding:2px 7px;border-radius:4px;color:var(--green);background:var(--green-soft);font-weight:400}.tag.amber{background:#f7f0e4;color:#a7834b}.tag.muted{background:var(--bg);color:var(--muted)}.continue-card .meta{font-size:11px;color:var(--muted);margin:8px 0}.continue-card h3{margin:7px 0 3px}.continue-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;margin-top:20px;align-items:center;font-size:10px;color:var(--muted)}.topics{display:grid;gap:12px}.topic{display:flex;gap:12px;align-items:center;border-bottom:1px solid var(--line);padding:0 0 13px}.topic:last-child{border-bottom:0;padding-bottom:0}.topic-icon{width:33px;height:33px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;border-radius:9px;font-size:17px}.topic strong{font-size:12px;font-weight:500;display:block}.topic small{font-size:10px;color:var(--muted)}.topic>a{margin-left:auto;font-size:15px;color:#8b9a8e}.section-space{margin-top:29px}.path-row{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.path-card{padding:19px 20px;border:1px solid var(--line);border-radius:10px;background:var(--panel);display:block}.path-card .num{font-size:9px;letter-spacing:1px;color:#9ca89d}.path-card h3{font-size:13px;margin:6px 0 4px}.path-card p{font-size:10px;color:var(--muted);margin:0}.path-card:hover{border-color:#adc1af}.toolbar{display:flex;gap:12px;margin:0 0 19px;flex-wrap:wrap}.search{flex:1;min-width:180px;position:relative}.search input{width:100%;height:43px;padding:10px 14px 10px 37px;border:1px solid var(--line);background:var(--panel);border-radius:8px;color:var(--text)}.search:before{content:"⌕";position:absolute;left:13px;top:5px;font-size:22px;color:var(--muted)}select{border:1px solid var(--line);background:var(--panel);border-radius:8px;color:var(--text);padding:9px 12px}.result-count{font-size:11px;color:var(--muted);margin-bottom:14px}.item-list{display:grid;gap:12px}.library-item{display:flex;align-items:center;gap:20px}.library-item .item-icon{width:44px;height:54px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;border-radius:5px;font-family:var(--serif);font-size:18px;flex-shrink:0}.library-item .item-content{flex:1;min-width:0}.library-item h3{margin:2px 0 5px}.library-item p{font-size:11px;color:var(--muted);margin:0}.library-item .item-actions{display:flex;align-items:center;gap:16px}.library-item .item-actions a{font-size:11px;color:var(--green)}.help-line{font-size:11px;color:var(--muted);line-height:1.8;margin:19px 0}.practice-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:21px}.question-index{padding:13px;height:max-content}.question-index button{width:100%;display:block;padding:13px 12px;text-align:left;border:0;border-radius:7px;background:transparent;color:var(--text);margin-bottom:6px}.question-index button.active{background:var(--green-soft);color:var(--green)}.question-index button small{display:block;font-size:10px;color:var(--muted)}.question-index button strong{display:block;font-size:12px;font-weight:500;margin:3px 0}.question-index .index-foot{font-size:10px;color:var(--muted);padding:10px 12px 0;border-top:1px solid var(--line)}.question-sheet{padding:28px 30px}.question-meta{display:flex;gap:8px;align-items:center;margin-bottom:18px;flex-wrap:wrap}.question-meta>span:last-child{font-size:10px;color:var(--muted);margin-left:auto}.question-sheet h2{font-family:var(--serif);font-size:22px;margin-bottom:16px}.question-text{font-size:15px;line-height:1.95}.source-link{display:inline-flex;align-items:center;gap:7px;font-size:11px;color:var(--green);border:0;background:none;padding:0;margin:1px 0 23px}.field-label{display:block;font-size:12px;margin:17px 0 8px;font-weight:500}.answer-area{width:100%;min-height:150px;resize:vertical;line-height:1.85;border:1px solid var(--line);border-radius:8px;padding:13px;background:var(--bg);color:var(--text)}.answer-controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:14px 0 0}.answer-controls .save-hint{margin-left:auto;font-size:10px;color:var(--muted)}.answers{border-top:1px solid var(--line);margin-top:24px;padding-top:24px}.answers h3{font-size:14px}.answer-version{background:var(--bg);border:1px solid var(--line);border-radius:8px;margin-bottom:13px;padding:16px;font-size:12px;line-height:1.9}.answer-version .answer-version-head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:10px}.answer-version p:last-child{margin-bottom:0}.review-actions{display:flex;gap:10px;flex-wrap:wrap}.note-compose{margin-top:22px;border-top:1px solid var(--line);padding-top:5px}.note-compose textarea{min-height:85px}.notes-list .note-card{margin-top:13px}.note-card .note-text{white-space:pre-wrap;overflow-wrap:anywhere;margin:12px 0;font-size:13px}.note-card .note-date{font-size:10px;color:var(--muted)}.note-card .note-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.empty{padding:45px 22px;text-align:center;border:1px dashed var(--line);border-radius:12px;background:var(--panel);color:var(--muted)}.empty .empty-icon{font-size:32px;color:#a9b8ac;margin-bottom:8px}.empty h3{color:var(--text);font-size:15px}.empty p{font-size:12px;margin-bottom:17px}.review-item{display:flex;align-items:center;gap:16px}.review-item>div{flex:1}.review-item h3{font-size:14px;margin:7px 0}.review-item p{font-size:11px;color:var(--muted);margin:0}.backup-panel{margin-top:25px;border-top:1px solid var(--line);padding-top:20px}.backup-panel h3{font-size:13px}.backup-panel p{font-size:11px;color:var(--muted)}.backup-controls{display:flex;gap:10px;flex-wrap:wrap}footer{margin:12px 42px 0;padding:17px 0 23px;border-top:1px solid var(--line);font-size:9px;color:#99a29a;display:flex;justify-content:space-between}dialog{border:1px solid var(--line);border-radius:15px;max-width:760px;width:calc(100% - 30px);max-height:85vh;background:var(--panel);color:var(--text);padding:26px 30px;box-shadow:0 20px 100px #0002}dialog::backdrop{background:#172c245c;backdrop-filter:blur(3px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:17px;margin-bottom:20px}.dialog-head h2{font-family:var(--serif);font-size:22px;margin-top:5px}#dialog-body{font-size:13px;line-height:1.9}#dialog-body h1{font-size:23px}#dialog-body h2{font-size:16px;margin:23px 0 9px}#dialog-body .source-info{background:var(--green-soft);border-radius:7px;padding:11px 15px;font-size:11px;margin-bottom:18px}#dialog-body code{word-break:break-all;font-size:10px}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);padding:10px 20px;background:#2e4a3d;color:white;border-radius:8px;font-size:12px;box-shadow:0 5px 25px #0002;opacity:0;pointer-events:none;transition:opacity .15s;z-index:30;max-width:92vw}#toast.show{opacity:1}.loading{padding:80px;text-align:center;color:var(--muted)}[hidden]{display:none!important}
:root[data-theme="dark"]{color-scheme:dark;--bg:#18211e;--panel:#202c26;--text:#dce5dd;--muted:#9daea1;--line:#35473b;--green:#8bb99b;--green-soft:#2c4134;--sidebar:#1c2821;--shadow:none}:root[data-theme="dark"] .hero{background:#2b4030}:root[data-theme="dark"] .hero h2{color:#d5e5d0}:root[data-theme="dark"] .hero p,:root[data-theme="dark"] .hero .eyebrow{color:#adc4a4}:root[data-theme="dark"] .demo-notice{background:#353526;color:#c7bd8b}:root[data-theme="dark"] .primary{color:#16281c}:root[data-theme="dark"] .tag.amber{background:#453e29;color:#dbc191}:root[data-theme="dark"] .avatar{background:#464132;color:#d3c6a5}
@media(min-width:1600px){main{padding-top:45px}.hero{min-height:240px;padding:37px 40px}.hero h2{font-size:37px}}
@media(max-width:1150px){.layout{grid-template-columns:205px minmax(0,1fr)}.sidebar{padding:25px 17px}.brand{font-size:14px;gap:8px}.brand-icon{width:34px;height:34px}.topbar,.demo-notice{padding-left:28px;padding-right:28px}main{padding:29px 28px 20px}.cols{grid-template-columns:1.3fr 1fr;gap:18px}.stat{padding:14px}.practice-layout{grid-template-columns:190px minmax(0,1fr);gap:15px}.question-sheet{padding:23px}.hero h2{font-size:29px}.hero p{max-width:300px}.library-item .item-actions{gap:10px}.panel{padding:19px}footer{margin-left:28px;margin-right:28px}}
@media(max-width:850px){.layout{grid-template-columns:minmax(0,1fr)}.sidebar{min-width:0;height:auto;position:static;padding:17px 22px 0;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:15px}.brand small{font-size:8px}.subject,.sidebar-foot{display:none}.sidebar nav{min-width:0;display:flex;gap:8px;margin-top:17px;overflow-x:auto;padding-bottom:10px}.sidebar nav a{font-size:12px;padding:8px 12px;white-space:nowrap;gap:7px;flex-shrink:0}.sidebar nav a>span{font-size:17px;width:17px}.sidebar nav b{display:none}.topbar{height:57px}.top-actions{gap:9px}.demo-notice{font-size:10px}.stats{gap:10px}.cols{grid-template-columns:1fr 1fr}.hero{min-height:204px}.intro{margin-bottom:21px}.practice-layout{grid-template-columns:minmax(0,1fr)}.question-index{min-width:0;display:flex;overflow-x:auto;gap:8px;padding:8px}.question-index button{flex:1;min-width:150px;margin:0;padding:10px}.question-index .index-foot{display:none}.library-item .item-actions{flex-direction:column;gap:5px}.path-card{padding:15px}h1{font-size:25px}footer{font-size:8px}}
@media(max-width:560px){.sidebar{padding:15px 17px 0}.sidebar nav{gap:3px;margin-top:14px}.sidebar nav a{padding:8px 10px;gap:5px;font-size:11px}.topbar{padding:0 18px;height:51px}.breadcrumb{font-size:10px}.demo-badge{font-size:9px}.demo-notice{padding:8px 18px;line-height:1.7;align-items:flex-start;gap:6px}.notice-dot{margin-top:6px}.demo-notice button{font-size:9px}main{padding:25px 18px 17px}h1{font-size:25px}.intro .date{display:none}.intro p{font-size:11px;max-width:90%}.hero{padding:25px 22px;min-height:218px;margin-bottom:16px}.hero h2{font-size:27px;letter-spacing:1px;margin-top:13px}.hero p{max-width:220px;font-size:11px}.hero .eyebrow{font-size:9px}.topography{right:-90px;width:85%;opacity:.35}.hero-coordinate{font-size:7px;right:13px;bottom:12px}.stats{grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:25px}.stat{padding:13px 15px}.stat strong{font-size:26px;margin:5px 0}.stat-head{font-size:10px}.stat small{font-size:9px}.cols{grid-template-columns:1fr;gap:23px}.panel{padding:19px}.section-head{margin-bottom:12px}.section-head .english{font-size:8px}.path-row{grid-template-columns:1fr;gap:9px}.path-card{display:grid;grid-template-columns:26px 1fr;column-gap:10px;align-items:center}.path-card .num{grid-row:span 2}.path-card h3{margin:0 0 2px}.path-card p{grid-column:2}.library-item{gap:12px;align-items:flex-start;padding:16px}.library-item .item-icon{width:34px;height:43px;font-size:15px}.library-item h3{font-size:13px}.library-item p{font-size:10px}.library-item .item-actions{align-items:flex-end}.library-item .primary{font-size:10px;padding:6px 9px;min-height:32px}.toolbar{gap:8px}.toolbar select{font-size:11px;max-width:145px}.search input{font-size:12px}.question-sheet{padding:20px 18px}.question-sheet h2{font-size:20px}.question-meta>span:last-child{width:100%;margin-left:0;margin-top:2px}.question-text{font-size:14px}.answer-controls .save-hint{width:100%;margin-left:0}.review-actions button{flex:1}.review-item{align-items:flex-start}.review-item .primary{font-size:10px;padding:6px 10px;min-width:65px}.note-card .note-top{align-items:flex-start}.note-card .note-top h3{font-size:13px}.note-card .note-top a{font-size:11px;white-space:nowrap}footer{margin:5px 18px 0;display:block;line-height:1.9}footer span{display:block}dialog{padding:20px}.dialog-head h2{font-size:19px}.help-line{font-size:10px}}