/* 思源 · 展示版样式（交大蓝 · 思源学堂视觉语言） */

:root{
  --blue:#0e6ccb;
  --blue-hover:#3d8bd8;
  --blue-deep:#0d61b7;
  --blue-tag:#ecf5ff;
  --blue-tag-line:#d9ecff;
  --ink:#303133;
  --regular:#606266;
  --muted:#909399;
  --line:#dcdfe6;
  --line-soft:#e4e7ed;
  --bg:#f5f7fa;
  --paper:#ffffff;
  --success:#67c23a;
  --warning:#e6a23c;
  --danger:#f56c6c;
  --shadow-sm:0 2px 4px rgba(14,108,203,.04),0 2px 12px rgba(0,0,0,.05);
  --shadow-md:0 4px 8px rgba(14,108,203,.06),0 8px 24px -8px rgba(0,0,0,.12);
  --radius:8px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  margin:0;
  color:var(--ink);
  font-family:"Helvetica Neue",Helvetica,"PingFang SC","Microsoft YaHei",Arial,sans-serif;
  background:
    radial-gradient(1000px 420px at 75% -10%,rgba(14,108,203,.08),transparent 60%),
    radial-gradient(800px 400px at -5% 8%,rgba(14,108,203,.05),transparent 55%),
    var(--bg);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(14,108,203,.18)}
button,input,select{font:inherit}
button,a,input,select{outline-offset:3px}
:focus-visible{outline:2px solid rgba(14,108,203,.5);border-radius:4px}
button{cursor:pointer;transition:all .22s var(--ease)}
button:disabled{opacity:.45;cursor:default}
a{color:var(--blue);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue-hover)}

/* ---------- 顶部导航 ---------- */
header{
  position:sticky;top:0;z-index:50;
  max-width:1392px;height:76px;padding:0 48px;margin:auto;
  display:flex;align-items:center;gap:28px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
  box-shadow:0 1px 4px rgba(0,0,0,.04);
}
.brand{display:flex;align-items:center;gap:14px}
.brand img{height:38px;width:auto;display:block}
.brand .divider{width:1px;height:26px;background:var(--line)}
.brand .app-name{font-size:17px;font-weight:600;color:var(--ink);letter-spacing:1px}
.brand .app-name small{display:block;font-size:9px;letter-spacing:1.2px;color:var(--muted);font-weight:400;margin-top:2px}
nav{display:flex;gap:4px;margin-left:auto}
nav a{
  font-size:13px;color:var(--regular);padding:8px 14px;border-radius:6px;
  transition:all .2s var(--ease);
}
nav a:hover{color:var(--blue);background:var(--blue-tag);text-decoration:none}
.version{font-size:12px;color:var(--muted);padding:8px 4px}
.version:hover{color:var(--blue)}
.avatar-link{
  font-size:12.5px;color:var(--blue);
  border:1px solid var(--blue-tag-line);background:var(--blue-tag);
  padding:8px 18px;border-radius:6px;
  transition:all .2s var(--ease);
}
.avatar-link:hover{background:var(--blue);color:#fff;border-color:var(--blue);text-decoration:none}

main{max-width:1392px;padding:40px 48px 20px;margin:auto}

/* ---------- 首屏 ---------- */
.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}
.eyebrow{font-size:10px;letter-spacing:2.4px;font-weight:700;color:var(--blue);margin-bottom:12px}
h1{font-size:46px;line-height:1.3;letter-spacing:0;margin:0 0 14px;font-weight:700;color:var(--ink)}
h1 span{font-weight:400;color:var(--blue)}
p{line-height:1.9}
.intro p{font-size:13.5px;color:var(--regular);margin:0}
.welcome-note{
  position:relative;width:330px;overflow:hidden;
  background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  padding:22px 26px;
}
.welcome-note::after{
  content:"";position:absolute;right:-46px;bottom:-46px;width:170px;height:170px;
  background:url("xjtu-badge.png") no-repeat center/contain;
  opacity:.07;pointer-events:none;
}
.welcome-note::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--blue);
}
.welcome-note>span{font-size:11px;color:var(--muted)}
.welcome-note strong{display:block;font-size:21px;line-height:1.7;font-weight:600;margin:12px 0;color:var(--ink)}
.welcome-note small{font-size:10.5px;color:var(--muted)}

/* ---------- 按钮 ---------- */
.primary{
  border:1px solid var(--blue);border-radius:6px;padding:10px 20px;
  font-size:13px;font-weight:500;color:#fff;background:var(--blue);
  box-shadow:0 2px 6px -1px rgba(14,108,203,.35);
}
.primary:hover{background:var(--blue-hover);border-color:var(--blue-hover);box-shadow:0 4px 12px -2px rgba(14,108,203,.45)}
.primary:active{background:var(--blue-deep);border-color:var(--blue-deep)}
.plain{background:transparent;border:0;padding:7px 8px;color:var(--regular);font-size:12.5px;border-radius:6px}
.plain:hover{color:var(--blue);background:var(--blue-tag)}

/* ---------- 连接状态条 ---------- */
.connection-bar{
  background:var(--paper);
  border:1px solid var(--line-soft);border-left:3px solid var(--blue);
  border-radius:var(--radius);
  display:flex;justify-content:space-between;align-items:center;padding:15px 22px;gap:14px;
  box-shadow:var(--shadow-sm);
}
.connection-bar>div{display:flex;align-items:center;gap:12px}
.connection-bar strong{font-size:13px}
.connection-bar span,.connection-bar a{font-size:11px;color:var(--muted)}
#connectionDot{height:8px;width:8px;background:#c0c4cc;border-radius:50%;transition:background .3s}
#connectionDot.live{background:var(--success);box-shadow:0 0 0 4px rgba(103,194,58,.15);animation:pulse 2.4s infinite}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(103,194,58,.2)}
  50%{box-shadow:0 0 0 7px rgba(103,194,58,.06)}
}
.connection-actions{flex-wrap:wrap}
.note{font-size:11px;color:var(--muted);line-height:1.9;margin:12px 0 0}
.error-note{font-size:12.5px;background:#fef0f0;border:1px solid #fde2e2;padding:12px 18px;border-radius:6px;color:var(--danger)}

/* ---------- 指标 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:28px 0}
.metrics article{
  background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius);
  padding:18px 22px;box-shadow:var(--shadow-sm);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.metrics article:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.metrics span{font-size:12px;color:var(--muted)}
.metrics strong{font-size:36px;font-weight:600;display:block;margin:8px 0 6px;color:var(--blue)}
.metrics small{font-size:10.5px;color:var(--muted)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--paper);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  padding:24px;margin-bottom:22px;
  box-shadow:var(--shadow-sm);
  transition:box-shadow .3s var(--ease);
}
.card:hover{box-shadow:var(--shadow-md)}
.section-title{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:20px}
h2{font-size:16px;font-weight:600;margin:0}
.section-title>span,.section-title a,.section-title label{font-size:11px;color:var(--muted)}
.section-title .eyebrow{font-size:9.5px;margin-bottom:8px}

.overview-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}

/* ---------- 列表项 ---------- */
.item-list .list-item{padding:14px 8px;border-bottom:1px solid var(--line-soft);display:flex;gap:15px;border-radius:6px;transition:background .2s}
.item-list .list-item:hover{background:var(--bg)}
.item-list .list-item:last-child{border:0}
.date-tile{
  background:var(--blue-tag);border:1px solid var(--blue-tag-line);
  border-radius:6px;padding:9px 6px;min-width:52px;text-align:center;
  font-size:10px;color:var(--blue);align-self:start;
}
.date-tile b{display:block;font-size:20px;color:var(--blue);font-weight:600}
.list-item h3{margin:0 0 6px;font-size:13.5px;font-weight:600;line-height:1.6;color:var(--ink)}
.list-item p{font-size:11.5px;color:var(--regular);margin:0}
.list-item small{font-size:10.5px;color:var(--muted)}
.list-item .item-body{min-width:0;flex:1}
.list-item a{font-size:11.5px;margin-left:auto;white-space:nowrap;align-self:center}
.live-label{
  font-size:9.5px;color:var(--success);
  background:#f0f9eb;border:1px solid #e1f3d8;
  border-radius:4px;padding:2px 8px;margin-left:8px;
}
.empty{font-size:12.5px;line-height:1.9;color:var(--muted);padding:15px 0}

/* ---------- 课程卡片 ---------- */
.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.course-card{
  position:relative;background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius);
  padding:20px 18px 18px;display:flex;flex-direction:column;align-items:start;gap:10px;min-height:154px;
  overflow:hidden;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;
}
.course-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--blue),#66a9e0);
}
.course-card:nth-child(3n+2)::before{background:linear-gradient(90deg,#36a3f7,#90d0f5)}
.course-card:nth-child(3n)::before{background:linear-gradient(90deg,#0d61b7,#4a90d9)}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c6d9ee}
.course-card .number{font-family:ui-monospace,monospace;font-size:10.5px;color:var(--muted);letter-spacing:1px}
.course-card h3{font-size:13.5px;line-height:1.7;margin:0;flex:1;font-weight:600}
.course-card p{font-size:10.5px;color:var(--muted);margin:0}
.course-card a{font-size:11.5px;font-weight:500}
.course-card a:hover{text-decoration:none}

/* ---------- 对话工作区 ---------- */
.workspace{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(300px,1fr);gap:22px}
.workspace>.left{min-width:0}
#messages{height:320px;overflow:auto;scroll-behavior:smooth;padding:4px 6px 4px 2px}
#messages::-webkit-scrollbar,.events::-webkit-scrollbar,.table-scroll::-webkit-scrollbar{width:6px;height:6px}
#messages::-webkit-scrollbar-thumb,.events::-webkit-scrollbar-thumb,.table-scroll::-webkit-scrollbar-thumb{background:#dcdfe6;border-radius:99px}
.message{display:flex;gap:10px;margin:0 0 16px;align-items:flex-start;animation:rise .3s var(--ease)}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.avatar{
  width:34px;height:34px;box-sizing:border-box;
  background:var(--paper) url("xjtu-badge.png") no-repeat center/78%;
  border:1px solid var(--blue-tag-line);border-radius:50%;
  flex-shrink:0;font-size:0;
  box-shadow:0 1px 4px rgba(14,108,203,.15);
}
.bubble{
  font-size:13px;line-height:1.9;max-width:86%;
  background:var(--bg);border:1px solid var(--line-soft);
  padding:11px 15px;border-radius:2px 12px 12px 12px;
  white-space:pre-wrap;overflow-wrap:anywhere;color:var(--ink);
}
.user{flex-direction:row-reverse}
.user .avatar{display:none}
.user .bubble{
  background:var(--blue-tag);border-color:var(--blue-tag-line);
  border-radius:12px 2px 12px 12px;
}
.suggestions{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 12px}
.suggestions button{
  font-size:11.5px;background:var(--blue-tag);
  border:1px solid var(--blue-tag-line);border-radius:4px;padding:6px 12px;color:var(--blue);
}
.suggestions button:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
form{display:flex;gap:10px}
form input{
  flex:1;min-width:0;border:1px solid var(--line);border-radius:6px;
  background:var(--paper);font-size:13px;padding:12px 15px;color:var(--ink);
  transition:border-color .2s,box-shadow .2s;
}
form input::placeholder{color:#c0c4cc}
form input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(14,108,203,.12);outline:none}
form .primary{white-space:nowrap}
.mic-row{display:flex;align-items:center;gap:10px;margin-top:14px}
.mic{
  border:1px solid var(--blue-tag-line);border-radius:6px;
  background:var(--blue-tag);color:var(--blue);padding:10px 16px;font-size:12.5px;font-weight:500;
}
.mic:hover{background:#dcecfB;border-color:#c6e0f5}
.mic.recording{background:#fdf6ec;color:var(--warning);border-color:#f5dab1;animation:micPulse 1.6s infinite}
@keyframes micPulse{
  0%,100%{box-shadow:0 0 0 3px rgba(230,162,60,.18)}
  50%{box-shadow:0 0 0 8px rgba(230,162,60,.05)}
}
#micHint{font-size:11px;color:var(--muted)}
.mic-row .plain{margin-left:auto}
.voice-tools{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:11px;color:var(--muted);margin-top:14px}
.voice-tools label{display:flex;align-items:center;gap:7px}
select{
  font-size:11px;border:1px solid var(--line);border-radius:6px;padding:6px 8px;
  background:var(--paper);color:var(--ink);cursor:pointer;
}
select:hover{border-color:#c0c4cc}
.upload{cursor:pointer;border-bottom:1px dashed #c0c4cc;font-size:11.5px;color:var(--regular);transition:color .2s}
.upload:hover{color:var(--blue);border-color:var(--blue)}
.upload input{position:absolute;width:1px;height:1px;opacity:0}
#replyAudio{width:100%;height:34px;margin-top:12px}

/* ---------- 流水线步骤 ---------- */
.steps>div{
  display:flex;gap:12px;border:1px solid transparent;border-radius:6px;
  padding:13px 12px;margin-bottom:5px;
  transition:all .25s var(--ease);
}
.steps b{font-size:10px;color:#c0c4cc;font-weight:600;letter-spacing:1px}
.steps strong{font-size:12.5px;font-weight:600;display:block}
.steps span{font-size:10.5px;color:var(--muted);display:block;line-height:1.8;margin-top:5px}
.steps .active{
  background:var(--blue-tag);
  border-color:var(--blue-tag-line);
  box-shadow:inset 3px 0 0 var(--blue);
}
.steps .active b{color:var(--blue)}
.meter-title{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin:20px 0 9px}
.meter{height:8px;background:#ebeef5;border-radius:99px;position:relative;overflow:hidden}
.meter i{
  display:block;height:100%;width:0;border-radius:99px;
  background:linear-gradient(90deg,#66a9e0,var(--blue));
  transition:width .12s linear;
}
.meter em{position:absolute;height:100%;border-left:2px solid var(--warning);top:0;left:12.5%}
details{margin-top:18px}
summary{font-size:11px;color:var(--muted);cursor:pointer;transition:color .2s}
summary:hover{color:var(--blue)}
.control{display:flex;align-items:center;gap:10px;font-size:11px;color:var(--muted);margin-top:14px}
.control input{flex:1;min-width:0;accent-color:var(--blue)}
.events{
  height:100px;overflow:auto;border-top:1px solid var(--line-soft);margin-top:16px;padding-top:9px;
  font-family:ui-monospace,monospace;font-size:9.5px;color:var(--muted);line-height:1.8;
}
.sync-events p{font-size:11px;line-height:1.8;color:var(--regular);margin:12px 0}
.sync-events time{color:var(--blue);margin-right:7px;font-weight:500}

/* ---------- 课堂展示 ---------- */
.demo-tools{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.demo-tools h2{width:100%;margin-bottom:10px}
.demo-tools .plain{
  border:1px solid var(--line);border-radius:6px;padding:8px 13px;background:var(--paper);color:var(--regular);
}
.demo-tools .plain:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-tag)}
.demo-tools .note{margin-top:5px}

/* ---------- 查询结果 ---------- */
.results h2 span{font-size:11px;color:var(--muted);margin-left:8px;font-weight:400}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;text-align:left;font-size:12px}
th,td{padding:12px 8px;border-bottom:1px solid var(--line-soft);line-height:1.8}
th{font-weight:600;color:var(--muted);white-space:nowrap;font-size:11px;background:#fafbfc}
tbody tr{transition:background .18s}
tbody tr:hover{background:var(--bg)}
td{overflow-wrap:anywhere;min-width:65px;color:var(--regular)}
.context-pill{
  font-size:10.5px;background:var(--blue-tag);
  border:1px solid var(--blue-tag-line);border-radius:4px;padding:4px 10px;
  color:var(--blue);display:inline-block;margin-top:12px;font-weight:500;
}

/* ---------- 资料区 ---------- */
#resourceSearch{
  font-size:12px;min-width:240px;border:1px solid var(--line);border-radius:6px;
  background:var(--paper);padding:10px 14px;color:var(--ink);
  transition:border-color .2s,box-shadow .2s;
}
#resourceSearch:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(14,108,203,.12);outline:none}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.resource-card{
  border:1px solid var(--line-soft);border-radius:var(--radius);padding:16px 17px;background:var(--paper);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;
}
.resource-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c6d9ee}
.resource-card h3{font-size:12.5px;font-weight:600;line-height:1.8;margin:0 0 7px}
.resource-card p{font-size:10.5px;color:var(--muted);margin:0}
.resource-card a{font-size:11px;display:inline-block;margin-top:12px;font-weight:500}

/* ---------- 页脚 ---------- */
footer{
  max-width:1296px;margin:0 auto 30px;padding-top:22px;
  border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:15px;
  color:var(--muted);font-size:10.5px;letter-spacing:.4px;
}

[hidden]{display:none!important}

/* ---------- 响应式 ---------- */
@media(min-width:1600px){h1{font-size:52px}.intro{padding:20px 0}}
@media(max-width:1000px){
  header,main{padding-left:25px;padding-right:25px}
  nav{gap:2px}
  .version{display:none}
  .course-grid{grid-template-columns:repeat(3,1fr)}
  .workspace{grid-template-columns:minmax(0,1.5fr) 300px}
  .connection-bar{flex-wrap:wrap}
  h1{font-size:38px}
  footer{margin:0 25px 25px}
}
@media(max-width:760px){
  header{height:64px;padding:0 18px;gap:12px}
  .brand img{height:30px}
  .brand .app-name{font-size:15px}
  nav{display:none}
  .avatar-link{margin-left:auto}
  main{padding:26px 16px}
  .intro{gap:12px}
  .welcome-note{display:none}
  h1{font-size:32px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metrics strong{font-size:30px}
  .connection-bar{padding:15px}
  .connection-bar>div{flex-wrap:wrap}
  .overview-grid,.workspace{grid-template-columns:1fr;gap:0}
  .course-grid{grid-template-columns:repeat(2,1fr)}
  .resource-grid{grid-template-columns:1fr}
  .card{padding:20px}
  .section-title{flex-wrap:wrap}
  .resources .section-title input{width:100%}
  #micHint{max-width:120px}
  .course-card{padding:16px 14px 14px}
  .results table{min-width:620px}
  footer{margin:0 16px 20px;flex-wrap:wrap}
}

.library-filters{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin:18px 0}.library-filters label{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px}.library-filters select{max-width:260px}.seat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(58px,1fr));gap:8px;margin-top:16px;max-height:440px;overflow:auto;padding:4px}.seat{padding:10px 4px;text-align:center;font-size:11px;border-radius:6px;border:1px solid #d9dfd7;cursor:default}.seat.available,.seat-legend .available{background:#e3f2e4;color:#285c3c;border-color:#aacdb1}.seat.occupied,.seat-legend .occupied{background:#ecefeb;color:#888;text-decoration:line-through}.seat.unknown,.seat-legend .unknown{background:#fff4de;color:#886722}.seat-legend{font-size:10px;color:var(--muted);display:flex;align-items:center;gap:7px}.seat-legend i{width:12px;height:12px;border:1px solid #ddd;border-radius:3px}.library .seat-grid>.empty{grid-column:1/-1}

/* ---------- 语音优先：助手置于首屏主体 ---------- */
#conversation{margin:0 0 40px}
#conversation .conversation .section-title h2{font-size:21px}
#conversation #messages{height:262px}
#conversation .mic{
  font-size:14px;font-weight:600;padding:14px 32px;border-radius:8px;
  letter-spacing:.5px;
}
#conversation .mic-row{margin-top:18px;gap:14px}
#conversation .mic-row #micHint{font-size:11.5px}
#conversation .pipeline .section-title h2{font-size:15px}

/* 固定导航下锚点定位留白 */
#conversation,#overview,#courses,#library,#resources{scroll-margin-top:92px}

/* ---------- 课程知识图谱 ---------- */
#knowledge{margin:0 0 40px;overflow:hidden;scroll-margin-top:92px}
.kg-stats{font-size:10.5px;color:var(--muted);font-weight:400;margin-left:10px}
.kg-tools{display:flex;gap:6px}
.kg-tools .plain{border:1px solid var(--line);border-radius:6px;padding:7px 12px;background:var(--paper)}
.kg-tools .plain:hover{border-color:var(--blue);background:var(--blue-tag)}
.kg-hint{font-size:12px;color:var(--regular);margin:-6px 0 16px;line-height:1.9}
.kg-hint b{color:var(--blue);font-weight:600}
.kg-searchbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:18px}
.kg-searchbar input{
  flex:1;min-width:260px;border:1px solid var(--line);border-radius:6px;
  background:var(--paper);font-size:13px;padding:11px 14px;color:var(--ink);
  transition:border-color .2s,box-shadow .2s;
}
.kg-searchbar input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(14,108,203,.12);outline:none}
.kg-examples{display:flex;gap:7px;flex-wrap:wrap;width:100%}
.kg-examples button{
  font-size:11px;background:var(--blue-tag);border:1px solid var(--blue-tag-line);
  border-radius:4px;padding:5px 10px;color:var(--blue);
}
.kg-examples button:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.kg-body{display:grid;grid-template-columns:minmax(0,1.72fr) minmax(320px,.92fr);gap:20px;align-items:stretch}
.kg-stage{
  border:1px solid var(--line-soft);border-radius:8px;position:relative;
  background:linear-gradient(180deg,#fbfdff,#f6fafd 60%,#f4f8fc);
  padding:10px 8px 6px;min-height:430px;display:flex;flex-direction:column;
}
#kgSvg{width:100%;height:auto;display:block;min-height:360px}
.kg-crumb{display:flex;gap:5px;align-items:center;flex-wrap:wrap;padding:4px 8px 8px;min-height:30px}
.kg-crumb-item{
  border:0;background:transparent;padding:3px 5px;border-radius:4px;
  font-size:11px;color:var(--regular);cursor:pointer;
}
.kg-crumb-item:hover{background:var(--blue-tag);color:var(--blue)}
.kg-crumb-item.current{color:var(--blue);font-weight:600;background:var(--blue-tag)}
.kg-crumb-sep{color:#c0c4cc;font-size:11px}
.kg-crumb-note{font-size:11px;color:var(--muted)}
.kg-node{cursor:pointer;outline:none}
.kg-node-box{
  fill:#fff;stroke:#cfdcea;stroke-width:1.2;
  transition:fill .2s,stroke .2s;
}
.kg-node.type-unit .kg-node-box{fill:#f1f8ff;stroke:#b9d6f2}
.kg-node.type-root .kg-node-box{fill:#eaf4ff;stroke:#9cc8ee}
.kg-node.type-more .kg-node-box{fill:#fafbfc;stroke:#dcdfe6;stroke-dasharray:4 3}
.kg-node:hover .kg-node-box,.kg-node:focus-visible .kg-node-box{stroke:var(--blue);fill:#f4faff}
.kg-node.focus .kg-node-box{fill:var(--blue);stroke:var(--blue);filter:drop-shadow(0 6px 12px rgba(14,108,203,.28))}
.kg-node-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:9.5px;fill:#93a8bd;letter-spacing:.3px}
.kg-node-title{font-size:12.5px;fill:var(--ink);font-weight:600}
.kg-node.focus .kg-node-code{fill:#cfe4ff}
.kg-node.focus .kg-node-title{fill:#fff}
.kg-node-hint{font-size:9px;fill:#cfe4ff;letter-spacing:1px}
.kg-edge{fill:none;stroke:#c9d8e7;stroke-width:1.4;transition:stroke .2s}
.kg-edge-prev,.kg-edge-next,.kg-edge-up,.kg-edge-down{stroke:#93bce3}
.kg-edge-prereq{stroke:#5b9bd5;stroke-width:1.8}
.kg-edge-related{stroke:#d2dce8}
.kg-edge-overview{stroke:#dbe6f1;stroke-width:1.2}
.kg-edge-label{font-size:9.5px;fill:#8fa6bd;paint-order:stroke;stroke:#fbfdff;stroke-width:4px;stroke-linejoin:round}
.kg-legend{display:flex;gap:14px;align-items:center;flex-wrap:wrap;padding:8px 10px 2px;font-size:10px;color:var(--muted);border-top:1px dashed var(--line-soft);margin-top:auto}
.kg-legend span{display:flex;align-items:center;gap:5px}
.kg-dot{width:9px;height:9px;border-radius:3px;background:#eaf4ff;border:1px solid #b9d6f2}
.kg-dot.concept{background:#fff;border-color:#cfdcea}
.kg-line{width:18px;height:0;border-top:1.5px solid #93bce3}
.kg-line.dashed{border-top-style:dashed;border-color:#c8d6e4}
.kg-legend-tip{margin-left:auto;color:#a8b3c0}
.kg-trace{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:9.5px;line-height:1.8;
  color:var(--muted);margin:6px 10px 4px;min-height:17px;
}
.kg-doc{
  border:1px solid var(--line-soft);border-radius:8px;background:var(--paper);
  display:flex;flex-direction:column;min-height:430px;max-height:560px;
}
.kg-doc-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;padding:15px 18px 12px;border-bottom:1px solid var(--line-soft)}
.kg-doc-head h3{font-size:14.5px;margin:5px 0 0;line-height:1.5}
.kg-doc-code{font-family:ui-monospace,monospace;font-size:11px;color:var(--blue);background:var(--blue-tag);border:1px solid var(--blue-tag-line);border-radius:4px;padding:2px 7px;margin-right:7px}
.kg-doc-kind{font-size:10.5px;color:var(--muted)}
.kg-doc-head .plain{border:1px solid var(--line);border-radius:6px;padding:6px 10px;white-space:nowrap;font-size:11px}
.kg-doc-head .plain:hover{border-color:var(--blue);background:var(--blue-tag);color:var(--blue)}
.kg-doc-body{padding:14px 18px 18px;overflow:auto;font-size:12.5px;line-height:1.95}
.kg-para{margin:0 0 10px}
.kg-para.lead{font-size:13px;color:var(--ink);font-weight:500;line-height:1.9}
.kg-para.project{background:#f6fbff;border-left:3px solid var(--blue);padding:8px 11px;border-radius:0 5px 5px 0;color:var(--regular)}
.kg-para.boundary{background:#fffaf1;border-left:3px solid var(--warning);padding:8px 11px;border-radius:0 5px 5px 0;color:#8a6d3b;font-size:11.5px}
.kg-para.prereq-path{font-size:12.5px;line-height:2;color:#0b57a4;background:#f2f8ff;border:1px solid #d6e9fb;border-radius:6px;padding:8px 11px;word-break:break-word}
.kg-para.prereq-side{font-size:12px;color:var(--regular)}
.kg-para.prereq-inline{font-size:12px;line-height:1.9;color:#0b57a4;background:#f4f9ff;border-left:3px solid #b9d6f2;border-radius:0 5px 5px 0;padding:7px 11px}
.kg-sentence.kg-no-read{cursor:default}
.kg-sentence.kg-no-read:hover{background:transparent}
.kg-para-title{font-size:10.5px;font-weight:600;letter-spacing:1.4px;color:var(--muted);margin:14px 0 5px}
.kg-points{margin:0 0 12px;padding-left:17px}
.kg-points li{margin:0 0 5px}
.kg-doc-source{font-size:10px;color:#b0b8c4;margin:14px 0 0;border-top:1px dashed var(--line-soft);padding-top:9px}
.kg-sentence{cursor:pointer;border-radius:3px;transition:background .18s,box-shadow .18s}
.kg-sentence:hover{background:#eef7ff}
.kg-sentence.speaking{background:#d9ecff;box-shadow:0 0 0 2px #d9ecff}
.kg-doc-body mark{background:#ffe9a8;color:inherit;padding:0 2px;border-radius:2px}
.kg-empty{color:var(--muted);font-size:12px}
.kg-relations{display:flex;flex-direction:column;gap:8px;margin-top:14px}
.kg-rel-group{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.kg-rel-label{font-size:10.5px;color:var(--muted);min-width:36px;letter-spacing:1px}
.kg-rel-chip{
  font-size:11px;border:1px solid var(--line);background:#fff;border-radius:999px;
  padding:5px 11px;color:var(--regular);max-width:100%;
}
.kg-rel-chip:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-tag)}
.kg-rel-chip.group-上位{border-color:#b9d6f2;background:#f1f8ff;color:#0d61b7}
.kg-rel-chip.group-下位{border-color:#d8e8f8;background:#f8fbff;color:#30618c}
.kg-rel-chip.group-先修{border-color:#9cc8ee;background:#eaf4ff;color:#0b57a4}
.kg-rel-chip.group-后续{border-color:#cfe4d4;background:#f3faf5;color:#2f6b45}
.kg-rel-chip.group-相关{border-style:dashed;color:var(--muted)}
.knowledge-inline{padding:4px 0 6px}
.ki-head{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.ki-code{font-family:ui-monospace,monospace;font-size:11px;color:var(--blue);background:var(--blue-tag);border:1px solid var(--blue-tag-line);border-radius:4px;padding:2px 7px}
.ki-head strong{font-size:14px}
.ki-kind{font-size:10.5px;color:var(--muted)}
.knowledge-inline p{font-size:12.5px;color:var(--regular);line-height:1.9;margin:10px 0}
.ki-points{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:4px}
.ki-points span{font-size:10.5px;color:#5a6b7d;background:#f5f8fb;border:1px solid #e6edf5;border-radius:4px;padding:4px 8px}
.knowledge-inline .plain{margin-top:6px;color:var(--blue);font-size:11.5px}

@media(max-width:1100px){
  .kg-body{grid-template-columns:1fr}
  .kg-doc{max-height:none}
}
@media(max-width:760px){
  #knowledge{padding:18px}
  .kg-searchbar input{min-width:0;width:100%}
  .kg-searchbar .primary{width:100%}
  .kg-legend-tip{display:none}
  .kg-relations{gap:6px}
  .kg-rel-chip{font-size:10.5px}
}

/* ---------- 课程主线：语音 × 图谱 × 上下文 ---------- */
.intro{
  position:relative;overflow:hidden;padding:34px 38px;margin-bottom:24px;
  border:1px solid #dce9f6;border-radius:14px;background:rgba(255,255,255,.78);
  box-shadow:0 14px 45px rgba(33,86,135,.07);
}
.intro::before{content:"";position:absolute;width:420px;height:420px;right:-160px;top:-240px;border-radius:50%;background:radial-gradient(circle,rgba(14,108,203,.13),transparent 68%);pointer-events:none}
.intro-main{position:relative;z-index:1}
.intro h1{font-size:44px;line-height:1.28;letter-spacing:-1px;margin-bottom:16px}
.intro h1 span{font-weight:650;background:linear-gradient(100deg,#0d61b7,#1687d9 60%,#409bc5);-webkit-background-clip:text;background-clip:text;color:transparent}
.intro p{font-size:14px;line-height:1.95}
.intro-tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}
.intro-tags span{padding:6px 11px;border:1px solid #dce9f6;border-radius:999px;background:#f7fbff;color:#426581;font-size:11px;font-weight:500}
.welcome-note{z-index:1;width:370px;padding:24px 26px;border-color:#d7e6f4;border-radius:12px;background:rgba(255,255,255,.9)}
.welcome-note strong{font-size:19px;line-height:1.65}
.voice-flow{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin:4px 0 14px;color:#7b9ab5;font-size:10px}
.voice-flow b{padding:4px 7px;border-radius:5px;background:#edf6ff;color:#0e6ccb;font-size:10px;font-weight:650}
.voice-flow i{font-style:normal;color:#9db8d2}

.course-pipeline{margin-top:18px;padding:13px 13px 8px;border:1px solid #e0eaf3;border-radius:8px;background:linear-gradient(180deg,#f8fbfe,#fff)}
.cp-title{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:9px}
.cp-title strong{font-size:11px;color:#38536c;letter-spacing:.4px}
.cp-title span{font-size:9px;color:#9aaaba}
.cp-step{display:grid;grid-template-columns:35px 1fr;gap:8px;align-items:start;padding:7px 0;border-top:1px dashed #e7edf3}
.cp-step b{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:9.5px;color:#93a8bd;letter-spacing:.5px;padding-top:2px}
.cp-step span{font-size:10.5px;line-height:1.7;color:#7b8b9b;overflow-wrap:anywhere}
.cp-step.done b{color:var(--blue)}
.cp-step.done span{color:#52687c}

.knowledge-inline{position:relative;padding:5px 0 9px}
.ki-live{margin-left:auto;padding:3px 7px;border:1px solid #cce4f7;border-radius:4px;background:#f0f8ff;color:#0e6ccb;font-size:8.5px;font-family:ui-monospace,monospace;letter-spacing:.6px}
.ki-context{margin:13px 0 9px;padding:11px;border:1px solid #dfeaf4;border-radius:8px;background:linear-gradient(120deg,#f7fbff,#fbfdff)}
.ki-sequence,.ki-path{display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap}
.ki-sequence button,.ki-path button{border:0;background:transparent;padding:5px 7px;border-radius:5px;color:#647b90;font-size:10.5px}
.ki-sequence button:hover,.ki-path button:hover{background:#e7f3ff;color:var(--blue)}
.ki-current{padding:7px 13px;border-radius:6px;background:var(--blue);color:#fff;font-size:12px;font-weight:600;box-shadow:0 4px 12px rgba(14,108,203,.2)}
.ki-path i{font-style:normal;color:#8ab4da;font-size:12px}
.ki-path button.endpoint{background:#eaf4ff;color:#0d61b7;font-weight:600}
.ki-relations{display:flex;flex-direction:column;gap:7px;margin:9px 0 12px}
.ki-rel-group{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.ki-rel-group>span{min-width:30px;color:#93a2b2;font-size:10px;letter-spacing:1px}
.ki-rel-group button{border:1px solid #e0e9f2;background:#fff;border-radius:999px;padding:4px 9px;color:#526c83;font-size:10.5px}
.ki-rel-group button:hover{border-color:#8dbce7;background:#f0f8ff;color:var(--blue)}
.ki-follow{align-self:flex-start;border:0;background:transparent;padding:3px 0;color:var(--blue);font-size:11px;text-align:left}
.ki-follow:hover{text-decoration:underline}
.ki-project{padding:10px 12px;border-left:3px solid #6ea9db;border-radius:0 6px 6px 0;background:#f5faff;color:#526b82;font-size:11px;line-height:1.85}
.ki-actions{display:flex;align-items:center;gap:10px;margin-top:8px}
.ki-actions .plain{margin-top:0;border:1px solid #dfe9f2;padding:6px 10px}
.ki-actions .plain:hover{border-color:#9dc5e9}

.kg-voice-button{border:1px solid #bcd9f1;border-radius:6px;padding:10px 16px;background:#edf6ff;color:#0d61b7;font-size:12px;font-weight:600;white-space:nowrap}
.kg-voice-button:hover{background:#dceeff;border-color:#82b6e2}
.kg-voice-button.recording{background:#fff5e8;border-color:#e9bd7e;color:#b67b23;animation:micPulse 1.6s infinite}
#knowledge{position:relative;border-color:#d9e7f3;background:linear-gradient(180deg,#fff,#fcfeff);box-shadow:0 12px 40px rgba(31,78,120,.07)}
#knowledge>.section-title h2{font-size:21px;letter-spacing:-.2px}
#knowledge>.section-title .eyebrow{color:#1679c9}
.kg-hint{max-width:1120px;font-size:12.5px}
.kg-stage{border-color:#dbe7f1;background:radial-gradient(circle at 50% 42%,#fff 0,#f8fbfe 48%,#f2f7fb 100%);box-shadow:inset 0 1px 0 #fff}
#kgSvg{min-height:390px}
.kg-node-code{font-size:10px}
.kg-node-title{font-size:13px}
.kg-edge-label{font-size:10.5px;fill:#6f8ca6}
.kg-edge{stroke-width:1.6}
.kg-edge-path{stroke:#3588cf;stroke-width:2.2}
.kg-edge-label-strong{fill:#0d61b7;font-size:11px;font-weight:600}
.kg-node.path-node .kg-node-box{fill:#f2f8ff;stroke:#74a9d7;stroke-width:1.5}
.kg-node.path-node .kg-node-hint{fill:#0e6ccb;font-weight:600}
.kg-node.dim{opacity:.24}
.kg-node.dim:hover{opacity:1}
.kg-node{transition:opacity .2s}
.kg-trace{font-size:10.5px;color:#698298;line-height:1.9;padding:5px 8px;border-radius:5px;background:rgba(255,255,255,.68)}
.kg-doc-body{font-size:13px}
.kg-para.lead{font-size:13.5px}
.kg-para.project,.kg-para.boundary{font-size:12px;line-height:1.85}
.kg-rel-chip{font-size:11.5px;padding:6px 12px}
.kg-rel-label{font-size:11px}

@media(max-width:1100px){
  .intro{padding:30px;gap:24px}.welcome-note{width:320px}.intro h1{font-size:38px}
}
@media(max-width:760px){
  .intro{padding:25px 22px;margin-bottom:18px}.intro h1{font-size:31px;letter-spacing:-.4px}.intro p br{display:none}.intro-tags{gap:6px}.intro-tags span{font-size:10px;padding:5px 8px}
  .kg-searchbar .kg-voice-button{width:100%}.ki-live{width:100%;margin-left:0;text-align:center}.ki-sequence{gap:4px}.ki-sequence button{font-size:10px;padding:4px}
  #kgSvg{min-height:300px}.kg-doc-body{font-size:12.5px}.cp-title span{display:none}
}
/* ---------- 情景追问面板（任务 B）---------- */
.kg-scenario{margin:10px 0 12px;padding:12px 14px;border:1px solid var(--blue-tag-line);border-radius:10px;background:linear-gradient(120deg,#f7fbff,#fbfdff)}
.kg-scenario-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.kg-scenario-tag{flex:none;padding:3px 10px;border-radius:999px;background:var(--blue-tag);border:1px solid var(--blue-tag-line);color:var(--blue);font-size:10.5px;letter-spacing:1px}
.kg-scenario-say{flex:1;min-width:220px;font-size:11.5px;color:#52687c;line-height:1.7}
.kg-scenario-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:9px}
.kg-scenario-list button{border:1px solid #bcd9f1;background:#fff;color:#0d61b7;font-size:11.5px;padding:6px 13px;border-radius:999px}
.kg-scenario-list button:hover{background:#edf6ff;border-color:#82b6e2}
.kg-scenario-list button.active{background:var(--blue);border-color:var(--blue);color:#fff}
.kg-scenario-example{margin:10px 0 8px;padding:8px 12px;border-left:3px solid #6ea9db;border-radius:0 6px 6px 0;background:#f5faff;color:#3d5771;font-size:12px;line-height:1.8}
.kg-scenario-steps{margin:6px 0 10px;padding:0;display:flex;flex-direction:column;gap:5px}
.kg-scenario-steps li{list-style:none;display:flex;gap:8px;align-items:baseline;font-size:11.5px;color:#647b90;line-height:1.7}
.kg-scenario-steps .kg-step-mark{flex:none;width:18px;height:18px;line-height:18px;text-align:center;border-radius:50%;border:1px solid #cfe1f0;color:#8fa6bb;font-size:10px}
.kg-scenario-steps li.current{color:#0d61b7;font-weight:600}
.kg-scenario-steps li.current .kg-step-mark{background:var(--blue);border-color:var(--blue);color:#fff}
.kg-scenario-steps li.done{color:#93a2b2;text-decoration:line-through}
.kg-scenario-steps li.done .kg-step-mark{background:#e9f5e9;border-color:#bcdcbd;text-decoration:none;color:#4f8f4f}
.kg-scenario-actions{display:flex;gap:10px;flex-wrap:wrap}
.kg-scenario-actions .plain{margin-top:0}
.kg-scenario-followups{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:10px}
.kg-scenario-followups[hidden]{display:none}
.kg-followup-caption{font-size:10.5px;color:#93a2b2;letter-spacing:.5px}
.kg-followup{border:1px dashed #9dc5e9;background:#f7fbff;color:var(--blue);font-size:11px;padding:5px 12px;border-radius:999px}
.kg-followup:hover{background:#e7f3ff;border-style:solid}
/* 先修证据（文档原文引用）与“文档原文”折叠段 */
.kg-prereq-evidence{display:block;font-size:10px;color:#8a9aa9;line-height:1.7;margin-top:2px}
.kg-doc-original{margin:8px 0;border:1px solid var(--line-soft);border-radius:8px;background:#fbfdff;padding:6px 10px}
.kg-doc-original summary{cursor:pointer;color:var(--blue);font-size:11.5px;letter-spacing:.5px;user-select:none}
.kg-doc-text{font-size:11.5px;color:#5c6c7c;line-height:1.9;margin:6px 0 2px}
@media(max-width:760px){
  .kg-scenario-list,.kg-scenario-actions,.kg-scenario-followups{flex-direction:column;align-items:stretch}
  .kg-scenario-list button,.kg-scenario-actions button,.kg-followup{width:100%;text-align:center}
  .kg-scenario-say{min-width:0}
}