*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","HarmonyOS Sans","Noto Sans SC",Arial,sans-serif;background:#f6f7f6;color:#1a2a1a;font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}
a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;font-family:inherit;background:none;outline:none}
:root{--green:#0c7222;--gl:#1a8a3a;--gbg:#f6faf4;--gbg2:#edf4ea;--gold:#D4A017;--gld2:#FFD700;--dk:#1a2a1a;--mid:#444;--gy:#888;--r:14px;--rb:30px;--sh:0 4px 20px rgba(12,114,34,0.10);--shh:0 8px 32px rgba(12,114,34,0.18)}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.ft{opacity:0;transform:translateY(16px);transition:opacity .45s ease,transform .45s ease}.ft.v{opacity:1;transform:translateY(0)}

/* ===== NAVBAR (全站统一) ===== */
#nv{position:sticky;top:0;z-index:1000;background:#fff;border-top:3px solid #0c7222;border-bottom:1px solid #e8f0e8;box-shadow:0 2px 12px rgba(12,114,34,0.07)}
.ni{display:flex;align-items:center;gap:14px;padding:0 20px;max-width:1200px;margin:0 auto;height:56px}
.nl{display:flex;flex-direction:column;flex-shrink:0}
.nm{font-size:18px;font-weight:800;color:var(--green);white-space:nowrap;letter-spacing:-0.3px}
.ns{font-size:11px;color:var(--gold);font-weight:500;white-space:nowrap;line-height:1;margin-top:-1px}
.nsw{flex:1;display:flex;flex-direction:column;gap:2px;max-width:500px}
.nsb{display:flex;align-items:center;border:1.5px solid var(--green);border-radius:22px;overflow:hidden;background:#f9fbf9;height:36px;transition:box-shadow .2s,border-color .2s}
.nsb:focus-within{border-color:var(--gl);box-shadow:0 0 0 3px rgba(12,114,34,0.12);background:#fff}
.nsb input{flex:1;border:none;outline:none;padding:0 12px;font-size:14px;font-family:inherit;color:var(--dk);background:transparent;min-width:100px}
.nsb input::placeholder{color:#bbb}
.nsb button{display:flex;align-items:center;gap:4px;background:var(--green);color:#fff;padding:0 14px;font-size:14px;font-weight:600;height:100%;transition:background .15s;border-radius:0 21px 21px 0}
.nsb button:hover{background:var(--gl)}
.npt{display:flex;align-items:center;gap:5px;flex-wrap:wrap}
.npl{font-size:11px;color:var(--gy)}
.nptg{font-size:11px;color:var(--gy);cursor:pointer;padding:1px 6px;border-radius:8px;transition:all .15s;white-space:nowrap}
.nptg:hover{color:var(--green);background:var(--gbg)}
.nr{display:flex;align-items:center;gap:8px;flex-shrink:0}
.nra{font-size:14px;color:var(--mid);cursor:pointer;white-space:nowrap;padding:4px 10px;border-radius:6px;transition:all .15s}
.nra:hover{color:var(--green);background:var(--gbg)}
.nra.on{color:var(--green);font-weight:600;background:var(--gbg)}
.nvb{background:linear-gradient(135deg,var(--gold),var(--gld2));color:#7a5800;padding:5px 12px;border-radius:18px;font-size:12px;font-weight:700;white-space:nowrap;box-shadow:0 2px 8px rgba(212,160,23,0.25);transition:transform .15s}
.nvb:hover{transform:translateY(-1px)}
.nlb{width:32px;height:32px;border-radius:50%;background:var(--gbg);display:flex;align-items:center;justify-content:center;font-size:15px;cursor:pointer;transition:background .15s}
.nlb:hover{background:var(--gbg2)}
.nmi{display:none;gap:8px;align-items:center}
.mmo{display:none;position:fixed;top:56px;left:0;right:0;background:#fff;z-index:999;box-shadow:0 4px 20px rgba(0,0,0,0.10);padding:8px 0;max-height:calc(100vh - 56px);overflow-y:auto}
.mmo.o{display:block}
.mmo a{display:flex;align-items:center;gap:8px;padding:12px 20px;font-size:15px;color:var(--mid);border-bottom:1px solid #f5f5f5}
.mmo a:last-child{border-bottom:none}
.mmo a:active{background:var(--gbg);color:var(--green)}
@media(max-width:992px){.ni{gap:10px;height:52px}.nsb{background:#f5f5f5;border-color:#e0e0e0}.nsb input{font-size:12px}.nsb button{padding:0 10px;font-size:12px}.nra{display:none}.nr{gap:6px}}
@media(max-width:768px){.ni{padding:0 12px;height:50px;gap:8px}.nm{font-size:15px}.ns{display:none}.nsw{max-width:none;flex:1}.nsb{height:32px;background:#f5f5f5;border-color:#e0e0e0}.nsb input{font-size:12px;min-width:60px;padding:0 8px}.nsb button{padding:0 8px;font-size:11px}.nsb button span:last-child{display:none}.npt{display:none}.nvb{font-size:11px;padding:3px 8px}.nlb{width:28px;height:28px;font-size:13px}.nmi{display:flex}}

/* ===== 页面标题区 ===== */
.page-head{background:linear-gradient(160deg,#064e3b,#0c7222);color:#fff;padding:32px 0 24px}
.page-head .container{text-align:center}
.page-head h1{font-size:28px;font-weight:800;margin-bottom:4px;letter-spacing:-0.3px}
.page-head .tagline{font-size:14px;opacity:.75;margin-bottom:8px;font-style:italic}
.page-head .badges{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.page-head .badge{background:rgba(255,255,255,0.1);padding:4px 14px;border-radius:16px;font-size:12px}
@media(max-width:768px){.page-head{padding:24px 0 18px}.page-head h1{font-size:22px}}

/* ===== 主体 ===== */
.main{display:grid;grid-template-columns:280px 1fr;gap:20px;padding:24px 0;align-items:start}
.main .container{display:contents}

/* ===== 侧栏科目选择 ===== */
.sidebar{background:#fff;border-radius:var(--r);padding:16px;box-shadow:0 1px 4px rgba(0,0,0,0.04);position:sticky;top:72px}
.sidebar h3{font-size:13px;font-weight:700;color:var(--gy);margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px}
.map-filters{display:flex;flex-direction:column;gap:12px}
.map-filter-group h4{font-size:12px;font-weight:600;color:var(--gy);margin:0 0 5px}
.sbl{display:flex;flex-direction:column;gap:4px}
.sbl a,.sbl button{display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;border-radius:10px;font-size:14px;color:var(--mid);text-align:left;transition:all .15s}
.sbl a:hover,.sbl button:hover{background:var(--gbg);color:var(--green)}
.sbl a.on,.sbl button.on{background:var(--gbg);color:var(--green);font-weight:600}
.sbl a .sbi,.sbl button .sbi{font-size:18px;width:24px;text-align:center}
.sbl a .sbcount,.sbl button .sbcount{font-size:11px;color:var(--gy);margin-left:auto;background:#f0f0f0;padding:1px 8px;border-radius:10px}
.sbl a.on .sbcount,.sbl button.on .sbcount{background:var(--gbg2);color:var(--green)}
@media(max-width:768px){
  .main{grid-template-columns:1fr}
  .sidebar{position:relative;top:0;margin-bottom:0;padding:12px}
  .sidebar h3{display:none}
  .map-filters{flex-direction:row;align-items:flex-start;gap:8px;overflow-x:auto}
  .map-filter-group{min-width:96px}
  .map-filter-group h4{font-size:11px}
  .sbl{flex-direction:row;flex-wrap:wrap;gap:4px}
  .sbl a,.sbl button{flex:0 0 auto;padding:6px 12px;font-size:13px}
  .sbl a .sbi,.sbl button .sbi{font-size:14px;width:auto;margin-right:2px}
  .sbl a .sbcount,.sbl button .sbcount{display:none}
}

/* ===== 知识树区 ===== */
.tree-area{min-width:0}
.tree-intro{background:#fff;border-radius:var(--r);padding:16px 20px;margin-bottom:16px;box-shadow:0 1px 4px rgba(0,0,0,0.04);font-size:13px;color:var(--gy);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.tree-intro .dot{width:6px;height:6px;background:var(--green);border-radius:50%;animation:pl 2s infinite}
@keyframes pl{0%,100%{opacity:1}50%{opacity:0.3}}
.tree-intro .tag{background:var(--gbg);color:var(--green);padding:2px 10px;border-radius:10px;font-size:11px;font-weight:600}
.tree-intro .tag.gold{background:#fff8e1;color:var(--gold)}

/* ===== 领域卡片 ===== */
.domain{margin-bottom:12px;background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:0 1px 4px rgba(0,0,0,0.04);transition:box-shadow .2s}
.domain:hover{box-shadow:var(--sh)}
.dh{display:flex;align-items:center;padding:16px 20px;cursor:pointer;gap:10px;user-select:none;transition:background .15s}
.dh:hover{background:var(--gbg)}
.dh .di{font-size:24px;flex-shrink:0}
.dh .dn{flex:1}
.dh .dn .dt{font-size:15px;font-weight:700;color:var(--dk)}
.dh .dn .ds{font-size:12px;color:var(--gy)}
.dh .dc{display:flex;gap:10px;font-size:12px;color:var(--gy)}
.dh .dc span{white-space:nowrap}
.dh .dc b{color:var(--green);font-weight:700}
.dh .arrow{font-size:14px;color:var(--gy);transition:transform .2s;flex-shrink:0}
.dh .arrow.o{transform:rotate(90deg)}
.dn-body{display:none}
.dn-body.o{display:block}

/* ===== 知识点节点 ===== */
.nodes{padding:4px 0 8px}
.node{padding:10px 20px 10px 54px;border-left:2px solid #e0e0e0;margin-left:18px;position:relative;cursor:pointer;transition:all .2s}
.node:hover,.node.on{background:var(--gbg);border-left-color:var(--green)}
.node::before{content:'';position:absolute;left:-5px;top:18px;width:8px;height:8px;background:var(--green);border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px var(--green)}
.node .nn{font-size:14px;font-weight:600;color:var(--dk);margin-bottom:4px}
.node .nm2{font-size:12px;color:var(--gy);margin-bottom:5px}
.node .nrc{display:flex;gap:10px;flex-wrap:wrap}
.node .nrc span{font-size:12px;display:inline-flex;align-items:center;gap:3px}
.node .nrc .v0{color:#bbb}
.node .nrc .v1{color:var(--green);font-weight:600}
.node .nrc [hidden],.res-panel .rpi[hidden]{display:none}

/* ===== 子节点(展开后) ===== */
.sub-nodes{padding:2px 0 4px;display:none}
.sub-nodes.o{display:block}
.sub-node{padding:8px 20px 8px 72px;border-left:1px dashed #d0d0d0;margin-left:36px;position:relative;cursor:pointer;transition:all .15s}
.sub-node:hover{background:var(--gbg)}
.sub-node::before{content:'';position:absolute;left:-3px;top:14px;width:6px;height:6px;background:#bbb;border-radius:50%}
.sub-node .nn2{font-size:13px;font-weight:500;color:var(--dk);margin-bottom:2px}
.sub-node .nrc2{display:flex;gap:8px;font-size:11px;color:var(--gy)}
.sub-node .nrc2 .v1{color:var(--green)}

/* ===== 知识地图数据标注 ===== -->
<!-- [数据接口] 知识点树JSON文件读取：/wp-content/themes/ceodocs/data/knowledge-map/初中数学.json -->
<!-- [数据接口] 节点展开时异步调用 sg33 API: get-videos-by-knowledge -->
<!-- [数据为空时] node显示0节灰色，点击弹出小沐老师气泡："这个知识点已标记，讲义正在加急准备中~" */

/* ===== 移动端折叠 ===== */
@media(max-width:768px){
  .nodes{padding:2px 0 4px}
  .node{padding:8px 12px 8px 40px;margin-left:12px}
  .node::before{left:-4px;top:14px;width:6px;height:6px}
  .sub-node{padding:6px 12px 6px 52px;margin-left:24px}
  .sub-node::before{left:-2px;top:12px}
  .dh{padding:12px 16px}
  .dh .dc{font-size:11px;gap:6px}
  .dh .di{font-size:20px}
}

/* ===== 资源面板（点击节点后展开） ===== */
.res-panel{display:none;margin-top:12px;background:var(--gbg);border-radius:var(--r);padding:16px 20px;border-left:3px solid var(--green)}
.res-panel.o{display:block}
.res-panel h4{font-size:14px;font-weight:700;color:var(--dk);margin-bottom:8px}
.res-panel .rp-items{display:flex;flex-direction:column;gap:6px}
.res-panel .rpi{display:flex;align-items:center;gap:10px;padding:8px 12px;background:#fff;border-radius:8px;font-size:13px;transition:all .15s;cursor:pointer;color:inherit;text-decoration:none}
.res-panel .rpi:hover{box-shadow:0 2px 8px rgba(0,0,0,0.06)}
.res-panel .rpi .rpi-icon{font-size:16px;flex-shrink:0}
.res-panel .rpi .rpi-title{flex:1;color:var(--dk)}
.res-panel .rpi .rpi-meta{font-size:11px;color:var(--gy)}
.res-panel .rpi .rpi-btn{background:var(--green);color:#fff;padding:4px 12px;border-radius:14px;font-size:11px;font-weight:600}

/* ===== 空数据 ===== */
.empty-state{display:none;text-align:center;padding:40px 20px}
.empty-state.a{display:block}
.empty-state .emoj{font-size:48px;margin-bottom:10px}
.empty-state p{font-size:14px;color:var(--gy);line-height:1.6}

/* ===== 小沐气泡 ===== */
.xiaomu-bubble{display:none;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:rgba(0,0,0,0.82);color:#fff;padding:14px 24px;border-radius:16px;font-size:14px;z-index:2001;max-width:320px;text-align:center;line-height:1.6}
.xiaomu-bubble.a{display:block;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0;transform:translate(-50%,-50%) scale(0.9)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}
.xiaomu-bubble .xicon{font-size:36px;margin-bottom:6px;display:block}

/* ===== 攻略区（知识地图页底部） ===== */
.knowledge-guide{margin-top:16px;background:#fff;border-radius:var(--r);padding:20px;box-shadow:0 1px 4px rgba(0,0,0,0.04)}
.knowledge-guide h3{font-size:15px;font-weight:700;color:var(--dk);margin-bottom:10px}
.knowledge-guide p{font-size:13px;color:var(--mid);line-height:1.7;margin-bottom:6px}
.knowledge-guide .qt{font-size:14px;color:var(--green);font-weight:600;font-style:italic;text-align:center;margin-top:10px}

/* ===== FOOTER ===== */
footer{background:#1a2a1a;color:rgba(255,255,255,0.75);padding:32px 0 16px;margin-top:24px}
.fi{max-width:1200px;margin:0 auto;padding:0 20px}
.fc{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:20px;margin-bottom:16px}
.fln{font-size:16px;font-weight:700;color:#fff;margin-bottom:6px}
.fd{font-size:12px;line-height:1.7;opacity:.65}
.fct{font-size:14px;font-weight:600;color:#fff;margin-bottom:8px}
.fl{display:flex;flex-direction:column;gap:5px}
.fl a{font-size:13px;opacity:.65;transition:opacity .15s}
.fl a:hover{opacity:1;color:#fff}
.fpi{font-size:12px;opacity:.65;margin-bottom:3px}
.fpi span{color:var(--gld2)}
.fb2{display:flex;justify-content:space-between;align-items:center;padding-top:12px;border-top:1px solid rgba(255,255,255,0.08);font-size:11px;opacity:.4;flex-wrap:wrap;gap:6px}
.fb2 a{margin-left:10px}
.fb2 a:hover{opacity:1;color:#fff}
@media(max-width:992px){.fc{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.fc{grid-template-columns:1fr;gap:14px}}