/* ============================================================
   云学堂 · 全站样式（设计令牌 + 三端组件 + 页面样式）
   令牌变更须同步 design-system.html
   ============================================================ */
:root{
  --brand:#2b6de8; --brand-dark:#1d54c0; --brand-bg:#eef4ff;
  --ok:#16a34a; --warn:#d97706; --danger:#dc2626;
  --bg:#f5f7fb; --card:#ffffff; --line:#e5e9f2;
  --text:#1f2937; --muted:#6b7280; --sidebar:#1c2536;
  --radius:10px; --shadow:0 1px 4px rgba(31,41,55,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:1100px;margin:0 auto;padding:24px 20px}
.page-title{font-size:20px;font-weight:600;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.page-sub{color:var(--muted);font-size:13px;margin-top:4px}
.mt{margin-top:16px}.mt8{margin-top:8px}.mt24{margin-top:24px}
.flex{display:flex;align-items:center;gap:12px}
.flex-between{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.muted{color:var(--muted)}
.small{font-size:12px}

/* 品牌字（登录卡片等处使用） */
.brand{font-size:18px;font-weight:700;color:var(--brand);white-space:nowrap}
.brand small{font-weight:400;color:var(--muted);font-size:12px;margin-left:6px}
.top-nav{display:flex;gap:4px;flex:1}
.top-nav a{padding:6px 12px;border-radius:6px;color:var(--text);font-size:14px}
.top-nav a:hover{background:var(--brand-bg);text-decoration:none}
.top-nav a.active{background:var(--brand);color:#fff}
.user-chip{display:flex;align-items:center;gap:10px}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}
.avatar.orange{background:#d97706}.avatar.purple{background:#7c3aed}

/* 徽标 / 标签 */
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;line-height:20px}
.badge.blue{background:var(--brand-bg);color:var(--brand)}
.badge.green{background:#e8f7ee;color:var(--ok)}
.badge.orange{background:#fdf3e7;color:var(--warn)}
.badge.red{background:#fdeaea;color:var(--danger)}
.badge.gray{background:#eef0f4;color:var(--muted)}
.badge.purple{background:#f3ecfe;color:#7c3aed}
.code-chip{display:inline-block;padding:1px 8px;border-radius:4px;background:#eef0f4;color:var(--muted);font-size:12px;font-family:Consolas,monospace}

/* 卡片 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.card-title{font-size:15px;font-weight:600;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 18px;border-radius:8px;border:1px solid var(--line);background:#fff;color:var(--text);cursor:pointer;font-size:14px;transition:.15s}
.btn:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dark);color:#fff}
.btn.danger{background:var(--danger);border-color:var(--danger);color:#fff}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.sm{padding:4px 12px;font-size:12px;border-radius:6px}
.btn.block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* 表单 */
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.form-row input,.form-row select,.form-row textarea{width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}
.form-row input:focus,.form-row select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(43,109,232,.12)}
.form-error{color:var(--danger);font-size:13px;min-height:18px}

/* 表格 */
table.tbl{width:100%;border-collapse:collapse;font-size:13px}
.tbl th{text-align:left;padding:10px 12px;background:#f8fafc;color:var(--muted);font-weight:500;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:hover td{background:#fafbfd}

/* 统计卡 */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.stat .num{font-size:26px;font-weight:700;margin:4px 0}
.stat .num em{font-style:normal;font-size:13px;color:var(--muted);font-weight:400}
.stat .trend{font-size:12px}
.trend.up{color:var(--ok)}.trend.down{color:var(--danger)}

/* 进度条 */
.progress{height:8px;background:#eef0f4;border-radius:999px;overflow:hidden;flex:1}
.progress i{display:block;height:100%;background:var(--brand);border-radius:999px;transition:width .3s}
.progress.green i{background:var(--ok)}

/* 简易柱状图 */
.bar-chart{display:flex;align-items:flex-end;gap:18px;height:180px;padding:10px 6px 0}
.bar-chart .bar{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.bar-chart .bar i{display:block;width:36px;background:var(--brand);border-radius:6px 6px 0 0}
.bar-chart .bar span{font-size:12px;color:var(--muted)}
.bar-chart .bar b{font-size:12px;font-weight:600}

/* 列表行 */
.list-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);gap:12px}
.list-row:last-child{border-bottom:none}
.cover{width:64px;height:44px;border-radius:6px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:600}
.cover.lg{width:100%;height:150px;font-size:15px;border-radius:var(--radius)}
.bg-c1{background:linear-gradient(135deg,#4f7ef7,#2b56c9)}
.bg-c2{background:linear-gradient(135deg,#f59e0b,#d97706)}
.bg-c3{background:linear-gradient(135deg,#10b981,#059669)}
.bg-c4{background:linear-gradient(135deg,#8b5cf6,#6d28d9)}
.bg-c5{background:linear-gradient(135deg,#ec4899,#be185d)}

/* 管理后台布局 */
/* 管理后台骨架：顶栏一级模块（横向）+ 模块内左侧菜单（纵向）+ 右侧内容 */
.admin-shell{min-height:100vh;display:flex;flex-direction:column}
.admin-body{display:flex;align-items:flex-start;flex:1}
.admin-side{width:212px;flex:none;background:#fff;border-right:1px solid var(--line);position:sticky;top:64px;height:calc(100vh - 64px);overflow-y:auto;padding-bottom:8px}
.admin-main{flex:1;min-width:0;display:flex;flex-direction:column;min-height:calc(100vh - 56px)}
.admin-content{padding:20px 24px;flex:1;width:100%}
.role-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--brand-bg);color:var(--brand);font-size:12.5px;font-weight:600}

/* 登录页 */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef4ff 0%,#f8fafc 60%);padding:30px 16px}
.login-box{width:420px;max-width:100%}
.login-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px;box-shadow:0 8px 30px rgba(31,41,55,.08)}
.login-logo{text-align:center;margin-bottom:20px}
.login-logo .brand{font-size:24px}
.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.quick-card{border:1px solid var(--line);border-radius:10px;padding:12px 14px;cursor:pointer;background:#fff;text-align:left;transition:.15s;font-family:inherit;font-size:13px}
.quick-card:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.quick-card b{display:block;font-size:13.5px}
.quick-card span{color:var(--muted);font-size:12px}
.login-tip{background:#fffbeb;border:1px solid #fde68a;color:#92400e;padding:8px 12px;border-radius:8px;font-size:12px;margin-bottom:16px}
.divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px;margin:20px 0}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}

/* 收银台 */
.pay-method{display:flex;gap:12px;margin:16px 0}
.pay-method label{flex:1;border:1px solid var(--line);border-radius:10px;padding:14px;cursor:pointer;text-align:center;font-size:14px}
.pay-method input{display:none}
.pay-method label:has(input:checked){border-color:var(--brand);background:var(--brand-bg);font-weight:600}
.qr-box{width:180px;height:180px;margin:16px auto;background:conic-gradient(#1f2937 0 25%,#fff 0 50%,#1f2937 0 75%,#fff 0);border:6px solid #1f2937;border-radius:8px;position:relative}
.qr-box::after{content:"演示二维码";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.85);font-size:13px;color:var(--muted)}

/* 考试 */
.exam-q{margin-bottom:24px}
.exam-q .q-title{font-weight:600;margin-bottom:10px}
.exam-opt{display:block;border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin-bottom:8px;cursor:pointer}
.exam-opt:hover{border-color:var(--brand)}
.exam-opt.sel{border-color:var(--brand);background:var(--brand-bg);font-weight:600}
.exam-opt input{margin-right:8px}

/* 课程学习页 */
.learn-layout{display:grid;grid-template-columns:260px 1fr;gap:20px;align-items:start}
.learn-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.learn-item{padding:9px 10px;border-radius:8px;display:flex;justify-content:space-between;align-items:center;font-size:13px;cursor:pointer}
.learn-item:hover{background:var(--brand-bg)}
.learn-item.done .t{color:var(--ok)}
.player{background:#111;color:#fff;border-radius:var(--radius);height:380px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.player .play-btn{width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center;font-size:24px;cursor:pointer}
.player .play-btn:hover{background:var(--brand)}

/* 提示浮层 */
#toast{position:fixed;top:70px;left:50%;transform:translateX(-50%);background:#1f2937;color:#fff;padding:10px 22px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:.25s;z-index:99}
#toast.show{opacity:.95}
#toast.err{background:var(--danger)}

/* 占位 / 403 页 */
.center-hero{min-height:70vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px}
.hero-icon{width:88px;height:88px;border-radius:50%;background:var(--brand-bg);display:flex;align-items:center;justify-content:center;font-size:38px}
.hero-icon.warn{background:#fdf3e7}
.hero-icon.red{background:#fdeaea}

/* 周课表 */
.week-tbl td{height:64px}
.cell-course{background:var(--brand-bg);border-left:3px solid var(--brand);border-radius:6px;padding:6px 10px;font-size:12.5px}
.cell-course b{display:block;font-size:12.5px}
.cell-course.live{background:#fdeaea;border-color:var(--danger)}
.cell-course.record{background:#e8f7ee;border-color:var(--ok)}

/* 1024 档：左侧菜单收窄，给表格留横向空间 */
@media (max-width:1024px){
  .admin-side{width:192px}
}

@media (max-width:860px){
  .stat-grid,.grid3{grid-template-columns:1fr 1fr}
  .learn-layout{grid-template-columns:1fr}
  /* 管理端窄屏：左侧菜单转为横向滚动条（移动端后台深度适配属二期范围） */
  .admin-body{flex-direction:column}
  .admin-side{width:100%;position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:2px;overflow-x:auto;padding:0 12px;scrollbar-width:none}
  .admin-side::-webkit-scrollbar{display:none}
  .as-brand,.as-group,.as-foot{display:none}
  .as-menu{display:flex;gap:2px;padding:8px 0}
  .as-menu a{white-space:nowrap;border-left:0!important;border-radius:6px}
  .admin-content{padding:16px}
  .admin-crumb .badge-code{display:none}
}

/* ============================================================
   后台顶栏 —— 完全复刻首页 header 的尺寸 / 间距 / 交互，
   仅替换配色（管理后台深蓝黑、教师深紫、我的学习深青）
   ============================================================ */
.b-header{
  position:sticky;top:0;z-index:30;height:64px;color:#fff;
  background:rgba(28,37,54,.94);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.10);
}
.b-header.teacher{background:rgba(36,31,69,.94);border-bottom-color:rgba(255,255,255,.10)}
.b-header.student{background:rgba(18,52,65,.94);border-bottom-color:rgba(255,255,255,.10)}
.b-header.admin{background:rgba(28,37,54,.94);border-bottom-color:rgba(255,255,255,.10)}
.b-inner{height:64px;padding:0 24px;display:flex;align-items:center;gap:8px}

/* 渐变字标（同首页 .brand，暗底下改为白→浅蓝渐变） */
.b-brand{
  font-size:20px;font-weight:900;letter-spacing:.5px;line-height:64px;flex:none;
  background:linear-gradient(85deg,#ffffff 0%,#c3d6f8 69%,#9dbdf5 99%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.b-brand:hover{text-decoration:none;filter:brightness(1.06)}
.b-brand small{
  display:inline-block;font-size:12px;font-weight:400;letter-spacing:0;
  color:rgba(255,255,255,.55);-webkit-text-fill-color:rgba(255,255,255,.55);
  margin-left:10px;padding-left:10px;border-left:1px solid rgba(255,255,255,.22);
}

/* 主导航：15px / 64px 行高 / 悬停渐变下划线（同首页 .nav-link） */
.b-nav{display:flex;align-items:center;height:64px;flex:1;overflow-x:auto;scrollbar-width:none}
.b-nav::-webkit-scrollbar{display:none}
.b-nav-link{
  position:relative;display:inline-flex;align-items:center;gap:4px;
  height:64px;padding:0 16px;white-space:nowrap;
  color:rgba(255,255,255,.76);font-size:15px;font-weight:500;
  transition:color 150ms cubic-bezier(.2,0,0,1);
}
.b-nav-link::after{
  content:"";position:absolute;left:16px;right:16px;bottom:12px;height:3px;border-radius:2px;
  background:linear-gradient(85deg,#4d94ff 0%,#a691ff 69%,#ffb9ad 99%);
  opacity:0;transform:scaleX(.4);transition:all 200ms cubic-bezier(.2,0,0,1);
}
.b-nav-link:hover{color:#fff;text-decoration:none}
.b-nav-link:hover::after{opacity:1;transform:scaleX(1)}
.b-nav-link.active{color:#fff;font-weight:600}
.b-nav-link.active::after{opacity:1;transform:scaleX(1)}

/* 右侧工具区（同首页 .header-tools 间距 16px） */
.b-tools{margin-left:auto;display:flex;align-items:center;gap:16px;height:64px;flex-shrink:0}
.b-home{
  height:38px;padding:0 18px;border-radius:999px;
  display:inline-flex;align-items:center;
  background:linear-gradient(135deg,#3080ff 0%,#1366ec 100%);
  color:#fff;font-size:14px;font-weight:500;white-space:nowrap;
  box-shadow:0 4px 12px rgba(19,102,236,.28);transition:all 200ms cubic-bezier(.2,0,0,1);
}
.b-home:hover{color:#fff;text-decoration:none;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 6px 16px rgba(19,102,236,.36)}
.b-avatar{
  width:34px;height:34px;padding:2px;border-radius:50%;overflow:hidden;flex:none;
  display:grid;place-items:center;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.26);
  font-size:13px;font-weight:600;color:#fff;
}
.b-avatar img,.avatar-btn img,.user-brief>img{width:100%;height:100%;object-fit:cover;border-radius:50%;display:block}
.b-role{font-size:13px;color:rgba(255,255,255,.68);white-space:nowrap}
.b-out{font-size:14px;color:rgba(255,255,255,.68);white-space:nowrap;transition:color 150ms}
.b-out:hover{color:#fff;text-decoration:none}

/* 内容区：与首页 .container 对齐（1160 / 两侧 24） */
.b-main{width:min(1160px,calc(100% - 48px));margin:0 auto;padding:28px 0 48px}
.b-page-head{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.b-page-head h1{font-size:20px;font-weight:700;color:var(--text)}
.badge-code{font-family:Consolas,monospace;font-size:12px;color:var(--muted);background:#eef0f4;padding:2px 8px;border-radius:6px}

/* 登录页门户导航（白底，完全对齐首页 header 规格） */
.portal-bar{
  background:rgba(255,255,255,.86);border-bottom:1px solid rgba(19,102,236,.08);
  position:sticky;top:0;z-index:30;height:64px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  color:#16192c;
}
.portal-inner{height:64px;padding:0 24px;display:flex;align-items:center;gap:8px}
.portal-brand{
  font-size:20px;font-weight:900;letter-spacing:.5px;line-height:64px;flex:none;
  background:linear-gradient(85deg,#1366ec 0%,#856efa 69%,#ffa091 99%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.portal-brand:hover{text-decoration:none;filter:brightness(1.05)}
.portal-nav{display:flex;align-items:center;height:64px;flex:1}
.portal-nav a{
  position:relative;display:inline-flex;align-items:center;height:64px;padding:0 16px;
  color:#5e6470;font-size:15px;font-weight:500;white-space:nowrap;
  transition:color 150ms cubic-bezier(.2,0,0,1);
}
.portal-nav a::after{
  content:"";position:absolute;left:16px;right:16px;bottom:12px;height:3px;border-radius:2px;
  background:linear-gradient(85deg,#1366ec 0%,#856efa 69%,#ffa091 99%);
  opacity:0;transform:scaleX(.4);transition:all 200ms cubic-bezier(.2,0,0,1);
}
.portal-nav a:hover{color:#1366ec;text-decoration:none}
.portal-nav a:hover::after{opacity:1;transform:scaleX(1)}
.portal-right{margin-left:auto;display:flex;align-items:center;gap:16px;height:64px}
.portal-cta{
  height:38px;padding:0 18px;border-radius:999px;display:inline-flex;align-items:center;
  background:linear-gradient(135deg,#3080ff 0%,#1366ec 100%);color:#fff;
  font-size:14px;font-weight:600;white-space:nowrap;
  box-shadow:0 4px 12px rgba(19,102,236,.28);transition:all 200ms cubic-bezier(.2,0,0,1);
}
.portal-cta:hover{color:#fff;text-decoration:none;filter:brightness(1.08);transform:translateY(-1px)}
@media (max-width:900px){
  .portal-bar{height:auto}
  .portal-inner{height:auto;flex-wrap:wrap;padding:10px 16px;gap:8px}
  .portal-brand{line-height:40px}
  .portal-nav{order:3;width:100%;height:44px;overflow-x:auto;scrollbar-width:none}
  .portal-nav::-webkit-scrollbar{display:none}
  .portal-nav a{height:44px;padding:0 12px;font-size:14px}
  .portal-nav a::after{bottom:4px;left:12px;right:12px}
}
@media (max-width:900px){
  .b-inner{height:auto;flex-wrap:wrap;padding:10px 16px;gap:10px}
  .b-header{height:auto}
  .b-brand{line-height:40px}
  .b-nav{order:3;width:100%;height:44px}
  .b-nav-link{height:44px;font-size:14px;padding:0 12px}
  .b-nav-link::after{bottom:4px;left:12px;right:12px}
  .b-role{display:none}
  .b-main{width:calc(100% - 32px);padding:20px 0 36px}
}

/* ============================================================
   课程学习页 S-014（视频播放器 / 任务目录 / 问答·笔记·资料）
   ============================================================ */
.learn-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.learn-back{color:var(--muted);font-size:13px;white-space:nowrap}
.learn-back:hover{color:var(--brand);text-decoration:none}
.learn-title{font-size:20px;font-weight:700;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.learn-prog{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);min-width:260px}
.player2{position:relative;background:#000;border-radius:var(--radius);overflow:hidden;aspect-ratio:16/9;box-shadow:var(--shadow)}
.player2 video{width:100%;height:100%;display:block;background:#000}
.player2 .cover-fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#cbd5e1;background:#0b1220}
.player2 .cover-fallback img{width:100%;height:100%;object-fit:cover;opacity:.5;position:absolute;inset:0}
.player2 .cover-fallback .big-play{position:relative;width:72px;height:72px;border-radius:50%;background:rgba(255,255,255,.92);color:#0b1220;display:flex;align-items:center;justify-content:center;font-size:26px;cursor:pointer;box-shadow:0 8px 30px rgba(0,0,0,.45)}
.pctl{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 10px;background:linear-gradient(180deg,transparent,rgba(0,0,0,.78));display:flex;flex-direction:column;gap:6px;opacity:0;transition:opacity .2s}
.player2:hover .pctl,.player2.is-touch .pctl{opacity:1}
.pctl .row{display:flex;align-items:center;gap:10px;color:#e5eaf5;font-size:12.5px}
.pbtn{background:none;border:0;color:#fff;font-size:16px;cursor:pointer;padding:4px 6px;border-radius:6px;line-height:1}
.pbtn:hover{background:rgba(255,255,255,.16)}
.pbtn.on{color:#7fb0ff}
.ptime{font-variant-numeric:tabular-nums}
.pbar{flex:1;height:14px;display:flex;align-items:center;cursor:pointer}
.pbar .track{position:relative;flex:1;height:4px;border-radius:999px;background:rgba(255,255,255,.28)}
.pbar .buf{position:absolute;left:0;top:0;bottom:0;background:rgba(255,255,255,.4);border-radius:999px}
.pbar .played{position:absolute;left:0;top:0;bottom:0;background:var(--brand);border-radius:999px}
.pbar .knob{position:absolute;top:50%;width:12px;height:12px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);box-shadow:0 1px 4px rgba(0,0,0,.4)}
.pmenu{position:absolute;bottom:46px;right:10px;background:rgba(15,23,42,.95);border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:6px;display:none;flex-direction:column;min-width:96px}
.pmenu.open{display:flex}
.pmenu button{background:none;border:0;color:#cbd5e1;padding:7px 12px;text-align:left;border-radius:6px;font-size:13px;cursor:pointer;white-space:nowrap}
.pmenu button:hover{background:rgba(255,255,255,.12);color:#fff}
.pmenu button.sel{color:#7fb0ff;font-weight:600}
.resume-tip{position:absolute;top:12px;left:12px;background:rgba(15,23,42,.88);color:#e5eaf5;font-size:12.5px;padding:8px 12px;border-radius:8px;display:none;align-items:center;gap:10px}
.resume-tip button{background:var(--brand);border:0;color:#fff;border-radius:6px;padding:3px 10px;cursor:pointer;font-size:12px}
.toc{position:sticky;top:84px;max-height:calc(100vh - 108px);overflow:auto}
.toc .toc-ch{margin-bottom:10px}
.toc .toc-ch>b{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--text);padding:8px 10px;background:#f6f8fc;border-radius:8px}
.toc-task{padding:9px 10px;border-radius:8px;display:flex;justify-content:space-between;align-items:center;font-size:13px;cursor:pointer;gap:8px}
.toc-task:hover{background:var(--brand-bg)}
.toc-task.cur{background:var(--brand-bg);color:var(--brand);font-weight:600}
.toc-task .st{flex:none;font-size:12px;color:var(--muted)}
.toc-task.done .st{color:var(--ok)}
.tico{display:inline-block;width:18px;text-align:center;margin-right:6px;color:var(--brand);font-size:12px}
.toc-task.done .tico{color:var(--ok)}
.ltabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-top:20px}
.ltab{background:none;border:0;border-bottom:2px solid transparent;padding:10px 16px;font-size:14px;color:var(--muted);cursor:pointer}
.ltab:hover{color:var(--brand)}
.ltab.on{color:var(--brand);border-bottom-color:var(--brand);font-weight:600}
.lpanel{display:none;padding-top:14px}
.lpanel.on{display:block}
.qa-item,.note-item{padding:12px 2px;border-bottom:1px dashed var(--line);font-size:13.5px}
.qa-item .who,.note-item .who{font-weight:600;margin-right:8px}
.qa-item time,.note-item time{color:var(--muted);font-size:12px;margin-left:8px}
.qa-item .ans{margin-top:6px;background:#f6f8fc;border-radius:8px;padding:8px 12px}
.qa-item .ans b{color:var(--brand)}
.note-item .del{color:var(--muted);cursor:pointer;font-size:12px;float:right}
.note-item .del:hover{color:var(--danger)}
.mat-item{display:flex;align-items:center;justify-content:space-between;padding:12px 2px;border-bottom:1px dashed var(--line);font-size:13.5px}
.doc-body{font-size:14.5px;line-height:1.9;color:var(--text)}
.doc-body h3{font-size:16px;margin:14px 0 8px;color:var(--text)}
.doc-body p{margin:8px 0}
.doc-body ul{padding-left:20px}
.live-card{background:linear-gradient(135deg,#1c2536,#2a3b5c);color:#e5eaf5;border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:10px}
.learn-foot{display:flex;justify-content:space-between;margin-top:16px}
textarea.hw-input{width:100%;min-height:120px;border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-family:inherit;font-size:13.5px;resize:vertical}
textarea.hw-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(43,109,232,.12)}
@media (max-width:900px){
  .learn-layout{grid-template-columns:1fr}
  .toc{position:static;max-height:none}
}

/* ============================================================
   运营概览 A-001（EduSoho v2 概况风格）
   ============================================================ */
.ov-welcome{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.ov-welcome h1{font-size:20px;font-weight:700}
.ov-welcome .sync{margin-left:auto;font-size:12.5px;color:var(--muted)}
.ov-welcome .sync b{color:var(--ok);font-weight:600}
.ov-chart{width:100%;height:220px;display:block}
.ov-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:16px}
.ov-grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}
/* 左列纵向弹性排布：趋势卡吸收两列高度差，消除网格行内的空白区 */
.ov-col-l{display:flex;flex-direction:column;gap:16px;min-width:0}
.ov-col-l>.card:first-child{flex:1;display:flex;flex-direction:column}
.ov-col-l>.card:first-child .ov-chart{flex:1;min-height:220px;height:auto}
.todo-row{display:flex;align-items:center;justify-content:space-between;padding:10px 2px;border-bottom:1px dashed var(--line);font-size:13.5px}
.todo-row:hover{color:var(--brand);text-decoration:none}
.todo-row .n{background:var(--danger);color:#fff;border-radius:999px;font-size:11.5px;min-width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;padding:0 6px}
.rank-row{display:flex;align-items:center;gap:10px;padding:9px 2px;border-bottom:1px dashed var(--line);font-size:13.5px}
.rank-row .idx{width:20px;height:20px;border-radius:6px;background:#eef0f4;color:var(--muted);display:inline-flex;align-items:center;justify-content:center;font-size:12px;flex:none}
.rank-row:nth-child(1) .idx{background:#fdeaea;color:var(--danger)}
.rank-row:nth-child(2) .idx{background:#fdf3e7;color:var(--warn)}
.rank-row:nth-child(3) .idx{background:#fff8e6;color:#d97706}
.rank-row .bar{height:6px;background:#eef0f4;border-radius:999px;overflow:hidden;flex:1}
.rank-row .bar i{display:block;height:100%;background:var(--brand);border-radius:999px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--brand-bg);color:var(--brand);border-radius:999px;padding:5px 12px;font-size:12.5px}
.chip:hover{background:var(--brand);color:#fff;text-decoration:none}
.app-card{display:flex;flex-direction:column;gap:4px;padding:12px;border:1px solid var(--line);border-radius:10px;font-size:13px}
.app-card:hover{border-color:var(--brand);text-decoration:none;box-shadow:var(--shadow)}
.app-card b{font-size:13.5px}
.app-card span{color:var(--muted);font-size:12px}
.upd-row{padding:10px 2px;border-bottom:1px dashed var(--line);font-size:13px}
.upd-row .v{color:var(--brand);font-weight:600;margin-right:8px;font-family:Consolas,monospace;font-size:12px}
.qa-row,.rv-row{padding:10px 2px;border-bottom:1px dashed var(--line);font-size:13.5px}
.qa-row .who,.rv-row .who{font-weight:600;margin-right:8px}
.qa-row time,.rv-row time{color:var(--muted);font-size:12px;margin-left:8px}
.rv-row .stars{color:#f59e0b;font-size:12px;letter-spacing:1px}
.quick-grid2{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.quick-grid2 a{display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 6px;border:1px solid var(--line);border-radius:10px;font-size:13px;color:var(--text)}
.quick-grid2 a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;box-shadow:var(--shadow)}
.quick-grid2 a i{font-style:normal;font-size:20px}
@media (max-width:1000px){.ov-grid,.ov-grid2{grid-template-columns:1fr}}

/* ============================================================
   后台列表页通用组件（课程管理 / 学员管理 / 商品订单共用）
   ============================================================ */

/* 工具栏：左侧筛选 + 右侧操作，窄屏自动换行 */
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.toolbar-group{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

/* 筛选控件：统一 38px 高，与 .btn 同基线 */
.tb-input,.tb-select{
  height:38px;padding:0 12px;
  border:1px solid var(--line);border-radius:8px;background:#fff;
  font-family:inherit;font-size:13.5px;color:var(--text);
  transition:border-color .15s,box-shadow .15s;
}
.tb-input{width:220px}
.tb-input::placeholder{color:#9aa3b2}
.tb-select{
  padding-right:30px;cursor:pointer;
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%236b7280' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 11px center;background-size:10px 6px;
}
.tb-input:hover,.tb-select:hover{border-color:#c9d4e6}
.tb-input:focus,.tb-select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(43,109,232,.12)}
.tb-count{font-size:12.5px;color:var(--muted);font-weight:400}

/* 表格：窄屏横向滚动，单元格内主信息（缩略图 + 标题 + 副标题） */
.tbl-scroll{overflow-x:auto}
.tbl-scroll::-webkit-scrollbar{height:8px}
.tbl-scroll::-webkit-scrollbar-thumb{background:#d7deea;border-radius:999px}
.tbl-scroll .tbl{min-width:760px}
.tbl-cell-main{display:flex;align-items:center;gap:12px;min-width:0}
.tbl-title{display:block;font-weight:600;color:var(--text);line-height:1.4}
.tbl-sub{display:block;margin-top:2px;font-size:12px;color:var(--muted);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cover img{width:100%;height:100%;object-fit:cover;border-radius:inherit;display:block}
.tbl .num{text-align:right;font-variant-numeric:tabular-nums}
.tbl-empty{text-align:center;padding:48px 12px;color:var(--muted);font-size:13.5px}
.tbl-empty .btn{margin-top:14px}
/* 按钮文字不换行（表格行内操作按钮曾被挤成两行） */
.btn{white-space:nowrap}
/* 标签不换行（「题库练习」等四字标签曾被列宽挤成两行） */
.badge{white-space:nowrap}

/* ============================================================
   管理端框架（adminShell）
   结构：顶栏（品牌 + 一级模块） / 左侧（当前模块二级菜单） / 内容区
   层级参考 EduSoho v2 新后台，配色沿用云学堂令牌（主色 #2b6de8、深色 #1c2536）
   ============================================================ */

/* —— 顶栏 —— 三端统一使用 b-header 结构（教师=深紫 / 学员=深青 / 管理后台=深蓝黑） */

/* 一级模块：图标 + 名称，尺寸与交互与前台导航 .b-nav-link 完全一致 */
.mod-tab{position:relative;display:inline-flex;align-items:center;gap:6px;height:64px;padding:0 16px;white-space:nowrap;color:rgba(255,255,255,.76);font-size:15px;font-weight:500;transition:color 150ms cubic-bezier(.2,0,0,1)}
.mod-tab .mod-i{width:16px;height:16px;flex:none;opacity:.85}
.mod-tab::after{content:"";position:absolute;left:16px;right:16px;bottom:12px;height:3px;border-radius:2px;background:linear-gradient(85deg,#4d94ff 0%,#a691ff 69%,#ffb9ad 99%);opacity:0;transform:scaleX(.4);transition:all 200ms cubic-bezier(.2,0,0,1)}
.mod-tab:hover{color:#fff;text-decoration:none}
.mod-tab:hover::after{opacity:1;transform:scaleX(1)}
.mod-tab.active{color:#fff;font-weight:600}
.mod-tab.active::after{opacity:1;transform:scaleX(1)}

/* —— 身份切换器（多身份账号）：管理后台 / 我的教育 / 我的学习 —— */
.id-switch{position:relative;display:flex;align-items:center;flex:none}
.id-btn{
  display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 12px;
  border:1px solid rgba(255,255,255,.22);border-radius:999px;
  background:rgba(255,255,255,.10);color:#fff;font-family:inherit;
  font-size:12.5px;font-weight:500;cursor:pointer;
  transition:background .15s,border-color .15s;
}
.id-btn:hover,.id-switch.is-open .id-btn{background:rgba(255,255,255,.20);border-color:rgba(255,255,255,.36)}
.id-persona{opacity:.72;flex:none}
.id-caret{opacity:.7;transition:transform .18s}
.id-switch.is-open .id-caret{transform:rotate(180deg)}
.id-menu{
  display:none;position:absolute;top:calc(100% + 10px);right:0;width:252px;padding:8px;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:0 16px 40px rgba(16,24,40,.20);z-index:60;
}
.id-switch.is-open .id-menu{display:block}
.id-hd{padding:6px 10px 8px;font-size:11.5px;color:#9aa3b2;border-bottom:1px solid var(--line);margin-bottom:6px}
.id-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;color:var(--text)}
.id-item:hover{background:var(--brand-bg);text-decoration:none}
.id-item.active{background:var(--brand-bg)}
.id-txt{display:flex;flex-direction:column;line-height:1.35;flex:1;min-width:0}
.id-item b{font-size:13.5px;font-weight:600;color:var(--text)}
.id-item small{font-size:11.5px;color:var(--muted)}
.id-item.active b{color:var(--brand)}
.id-now{flex:none;font-style:normal;font-size:11px;color:var(--brand);background:rgba(43,109,232,.12);border-radius:999px;padding:1px 7px}

/* 运营概览「身份入口」卡片 */
.id-entries{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.id-entry{display:flex;flex-direction:column;gap:4px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:#fbfcff;color:var(--text);transition:all .16s}
.id-entry:hover{border-color:rgba(43,109,232,.45);background:#f4f7fe;text-decoration:none;transform:translateY(-1px);box-shadow:0 6px 16px rgba(31,41,55,.06)}
.id-entry b{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text)}
.id-entry span{font-size:12px;color:var(--muted)}
.id-entry em{font-style:normal;font-size:12px;color:var(--brand);margin-top:2px}
.id-entry.on{border-color:rgba(43,109,232,.40);background:var(--brand-bg)}
@media (max-width:900px){.id-entries{grid-template-columns:1fr}}

/* 员工管理「可切换身份」徽标 + 配置弹窗勾选行 */
.id-chips{display:flex;flex-wrap:wrap;gap:4px}
.id-chip{font-size:11.5px;line-height:18px;padding:0 7px;border-radius:5px;background:#eef4ff;color:#2b6de8;border:1px solid rgba(43,109,232,.16);white-space:nowrap}
.id-chip.edu{background:#f3f0ff;color:#6b4ee6;border-color:rgba(107,78,230,.18)}
.id-chip.stu{background:#eafaf3;color:#0f9d6e;border-color:rgba(15,157,110,.18)}
.check-row{display:flex;align-items:center;gap:9px;padding:9px 2px;font-size:13.5px;cursor:pointer;border-bottom:1px solid var(--line)}
.check-row:last-child{border-bottom:0}
.check-row input{width:auto;margin:0}

/* —— 左侧（当前模块菜单）—— */
.as-brand{display:flex;align-items:center;gap:9px;padding:15px 18px 12px;font-size:14.5px;font-weight:700;color:var(--text);border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:2}
.as-brand .mod-i{width:17px;height:17px;color:var(--brand);flex:none}
.as-group{padding:14px 18px 5px;font-size:11px;font-weight:600;color:#9aa3b2;letter-spacing:.06em}
.as-menu{display:flex;flex-direction:column}
.as-menu a{display:flex;align-items:center;gap:8px;padding:8px 18px 8px 16px;color:#4b5563;font-size:13.5px;line-height:1.5;border-left:3px solid transparent;transition:background .12s,color .12s}
.as-menu a .sm-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.as-menu a:hover{background:#f4f7fe;color:var(--brand);text-decoration:none}
.as-menu a.active{background:var(--brand-bg);color:var(--brand);font-weight:600;border-left-color:var(--brand)}
.as-menu .code-chip{flex:none;font-family:Consolas,monospace;font-size:10.5px;color:#9aa3b2;background:#f1f3f8;border-radius:4px;padding:1px 5px}
.as-menu a.active .code-chip{background:rgba(43,109,232,.12);color:var(--brand)}
.as-foot{margin-top:14px;padding:12px 18px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.as-foot a{color:var(--muted)}
.as-foot a:hover{color:var(--brand);text-decoration:none}

/* —— 单页模块（概况）：无左侧菜单，内容整体居中；模块内页面横向胶囊切换 —— */
.admin-main-full{width:100%}
.admin-main-full .admin-content{max-width:1240px;margin:0 auto}
.admin-subnav{display:flex;justify-content:center;gap:8px;padding:14px 24px 0;flex-wrap:wrap}
.admin-subnav a{padding:6px 18px;border-radius:999px;font-size:13.5px;color:#4b5563;background:#fff;border:1px solid var(--line);transition:color .12s,border-color .12s,background .12s}
.admin-subnav a:hover{color:var(--brand);border-color:var(--brand);text-decoration:none}
.admin-subnav a.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}

/* —— 面包屑：当前模块 / 页面名 + 页面编号 —— */
.admin-crumb{display:flex;align-items:center;gap:8px;padding:12px 24px 0;font-size:12.5px;color:var(--muted);width:100%}
.admin-crumb i{font-style:normal;color:#c3c9d6}
.admin-crumb strong{color:var(--text);font-weight:600;font-size:13px}
.admin-crumb .badge-code{margin-left:2px}

/* ============================================================
   列表页通用件（listPage）：分页 / 行内操作 / 表单页布局
   ============================================================ */
.pager{display:flex;align-items:center;justify-content:flex-end;gap:6px;padding-top:14px;border-top:1px solid var(--line);margin-top:4px;flex-wrap:wrap}
.pager .tb-count{margin-right:auto}
.pg{min-width:32px;height:32px;padding:0 10px;border:1px solid var(--line);background:#fff;border-radius:6px;font-size:13px;color:var(--text);cursor:pointer;font-family:inherit}
.pg:hover:not(:disabled){border-color:var(--brand);color:var(--brand)}
.pg.on{background:var(--brand);border-color:var(--brand);color:#fff}
.pg:disabled{opacity:.45;cursor:not-allowed}
.pg-gap{color:var(--muted);padding:0 2px}

.row-ops{display:flex;gap:12px;white-space:nowrap}
.lk{font-size:13px;color:var(--brand);cursor:pointer}
.lk:hover{text-decoration:underline}
.lk.danger{color:var(--danger)}
.tbl th.num,.tbl td.num{text-align:right}
.tbl .tbl-empty{text-align:center}

/* 表单页：左表单 + 右侧说明栏 */
.form-layout{display:grid;grid-template-columns:1fr 300px;gap:16px;align-items:start}
.form-aside{display:flex;flex-direction:column;gap:16px}
.form-aside .card{padding:16px 18px}
.plain-list{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--muted);line-height:1.6}
.plain-list li{position:relative;padding-left:12px}
.plain-list li::before{content:"";position:absolute;left:0;top:8px;width:5px;height:5px;border-radius:50%;background:var(--brand);opacity:.55}
.field-hint{font-size:12px;color:var(--muted);margin-top:6px}
.switch-row{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--text);cursor:pointer}
.switch-row input{width:16px;height:16px;accent-color:var(--brand)}
.form-row select,.form-row textarea{width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}
.form-row textarea{resize:vertical}
.form-row select:focus,.form-row textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(43,109,232,.12)}
@media (max-width:1000px){.form-layout{grid-template-columns:1fr}.form-aside{order:-1}}

/* 弹窗（modal）：新建账号、重置密码等高风险操作 */
.modal-mask{position:fixed;inset:0;background:rgba(17,24,39,.45);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal{width:520px;max-width:100%;max-height:88vh;overflow:auto;background:#fff;border-radius:12px;box-shadow:0 20px 50px rgba(17,24,39,.24)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.modal-head h3{font-size:16px;font-weight:600}
.modal-x{border:0;background:none;font-size:22px;line-height:1;color:var(--muted);cursor:pointer;padding:0 4px}
.modal-x:hover{color:var(--text)}
.modal-body{padding:18px 20px}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;padding:14px 20px;border-top:1px solid var(--line);background:#fbfcfe;border-radius:0 0 12px 12px}
.pwd-once{font-family:Consolas,monospace;font-size:15px;background:#fff8e6;border:1px dashed #f0c36d;color:#92400e;padding:10px 14px;border-radius:8px;letter-spacing:1px;display:inline-block}
.alert-inline{display:flex;gap:10px;padding:10px 12px;border-radius:8px;background:#fffbeb;border:1px solid #fde68a;color:#92400e;font-size:13px;line-height:1.6}

/* 播放器音量控制（学习页 S-014） */
.vol{width:64px;height:14px;-webkit-appearance:none;appearance:none;background:transparent;cursor:pointer;flex:none}
.vol:focus{outline:none}
.vol::-webkit-slider-runnable-track{height:3px;border-radius:999px;background:rgba(255,255,255,.32)}
.vol::-webkit-slider-thumb{-webkit-appearance:none;width:10px;height:10px;border-radius:50%;background:#fff;margin-top:-3.5px;box-shadow:0 1px 3px rgba(0,0,0,.4)}
.vol::-moz-range-track{height:3px;border-radius:999px;background:rgba(255,255,255,.32)}
.vol::-moz-range-thumb{width:10px;height:10px;border:0;border-radius:50%;background:#fff}
.vol:focus-visible{outline:2px solid #7fb0ff;outline-offset:2px;border-radius:4px}
@media (max-width:900px){.vol{display:none}}

/* 笔记删除二次确认（行内，不弹窗） */
.note-item .confirm-del{float:right;display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.note-item .confirm-del button{border:0;background:none;cursor:pointer;font-size:12px;padding:2px 6px;border-radius:4px}
.note-item .confirm-del .yes{color:var(--danger);font-weight:600}
.note-item .confirm-del .yes:hover{background:#fdeaea}
.note-item .confirm-del .no{color:var(--muted)}
.note-item .confirm-del .no:hover{background:#eef0f4}

/* ============================================================
   课程学习页 S-014 v2（参考公开课页布局：面包屑 + 主副栏）
   ============================================================ */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:14px;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand);text-decoration:none}
.crumb .sep{color:#c3cad6}
.crumb .cur{color:var(--text)}
.learn-grid2{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:20px;align-items:start}
.l-main{min-width:0}
.l-aside{position:sticky;top:84px;display:flex;flex-direction:column;gap:16px;max-height:calc(100vh - 108px);overflow:auto;scrollbar-width:thin}
.l-title-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 2px 0}
.l-title-row h1{font-size:18px;font-weight:700;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.l-views{display:inline-flex;align-items:center;gap:5px;color:var(--muted);font-size:13px;white-space:nowrap}
.l-acts{margin-left:auto;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.act-btn{display:inline-flex;align-items:center;gap:5px;background:none;border:0;cursor:pointer;color:var(--muted);font-size:13px;padding:6px 10px;border-radius:8px;white-space:nowrap}
.act-btn:hover{background:var(--brand-bg);color:var(--brand)}
.act-btn.on{color:var(--brand);font-weight:600}
.act-btn.on .ico{color:var(--brand)}
.act-btn .ico{font-size:14px}
.act-btn.primary-act{background:var(--brand);color:#fff;font-weight:600;padding:7px 16px}
.act-btn.primary-act:hover{background:var(--brand-dark);color:#fff}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.side-card>b{display:block;font-size:14.5px;margin-bottom:10px}
.reco-item{display:flex;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line);cursor:pointer}
.reco-item:last-child{border-bottom:0}
.reco-item:hover .reco-t{color:var(--brand)}
.reco-item img{width:96px;height:60px;object-fit:cover;border-radius:8px;flex:none}
.reco-item .reco-t{font-size:13.5px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.reco-item .reco-m{font-size:12px;color:var(--muted);margin-top:4px;display:flex;gap:8px;align-items:center}
.reco-item .reco-m .free{color:var(--ok);font-weight:600}
.tcard{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;padding:6px 0 2px}
.tcard img{width:72px;height:72px;border-radius:50%;object-fit:cover}
.tcard b{font-size:14.5px}
.tcard .t-role{font-size:12px;color:var(--brand);background:var(--brand-bg);border-radius:999px;padding:2px 10px}
.tcard p{font-size:12.5px;color:var(--muted);line-height:1.6;margin:2px 0 0}
.tcard .t-cta{margin-top:4px;font-size:12.5px;color:var(--brand)}
.intro-body{font-size:14px;line-height:1.85;color:var(--text)}
.intro-body p{margin:8px 0}
.intro-sec{margin-top:12px}
.intro-sec h4{font-size:14px;margin-bottom:6px}
.intro-sec ul{padding-left:18px;font-size:13.5px;color:var(--text);line-height:1.9}
.chap-mini{display:flex;justify-content:space-between;align-items:center;padding:9px 2px;border-bottom:1px dashed var(--line);font-size:13.5px}
.chap-mini .n{color:var(--muted);font-size:12px}
@media (max-width:960px){
  .learn-grid2{grid-template-columns:1fr}
  .l-aside{position:static;max-height:none}
  .l-acts{margin-left:0;width:100%}
}

/* ============================================================
   班课 A-011：列表单元格 / 行内更多菜单
   ============================================================ */
.cls-cover{width:52px;height:52px;border-radius:8px;overflow:hidden;flex:none;background:#eef0f4;border:1px solid var(--line)}
.cls-cover img{width:100%;height:100%;object-fit:cover;display:block}
.cell-ellipsis{display:block;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cell-num{font-variant-numeric:tabular-nums;font-weight:600}
.mini-bar{height:4px;width:76px;margin-top:5px;margin-left:auto;background:#eef0f4;border-radius:999px;overflow:hidden}
.mini-bar i{display:block;height:100%;background:var(--brand);border-radius:999px}
.mini-bar.green i{background:var(--ok)}
.mini-bar.full i{background:var(--danger)}
.more-link{display:inline-flex;align-items:center;gap:3px}
.more-link .caret{font-size:10px;opacity:.7}
.row-menu{position:fixed;z-index:120;min-width:132px;padding:6px;background:#fff;border:1px solid var(--line);
  border-radius:10px;box-shadow:0 14px 34px rgba(16,24,40,.18);display:flex;flex-direction:column}
.row-menu button{border:0;background:none;text-align:left;padding:8px 12px;border-radius:6px;font-family:inherit;
  font-size:13px;color:var(--text);cursor:pointer;white-space:nowrap}
.row-menu button:hover{background:var(--brand-bg);color:var(--brand)}
.row-menu button.danger{color:var(--danger)}
.row-menu button.danger:hover{background:#fdeaea;color:var(--danger)}

/* 班课详情弹窗 */
.dt-head{display:flex;gap:14px;align-items:center;margin-bottom:16px}
.dt-head .cls-cover{width:64px;height:64px}
.dt-title{font-size:16px;font-weight:700;line-height:1.4;margin-bottom:6px}
.dt-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.dt-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;font-size:13px}
.dt-grid div{display:flex;gap:8px;padding:6px 0;border-bottom:1px dashed var(--line)}
.dt-grid dt{color:var(--muted);flex:none;width:96px}
.dt-grid dd{color:var(--text);min-width:0}
.dt-sec{margin-top:16px}
.dt-sec h4{font-size:13.5px;margin-bottom:8px}
.dt-sec p{font-size:13px;line-height:1.75}

/* ============================================================
   班课 A-011：新建 / 编辑班课（四步向导）
   ============================================================ */
.create-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap}
.create-head .page-title{gap:8px}
.create-head .btn{flex:none}
.form-grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
.inline-fields{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13.5px}
.req{color:var(--danger);font-style:normal;margin-left:2px}
input.is-readonly,textarea.is-readonly{background:#f6f8fc;color:var(--muted);cursor:not-allowed}

/* 步骤条 */
.stepper{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow);overflow:hidden}
.step{display:flex;align-items:center;gap:10px;padding:14px 16px;border:0;border-right:1px solid var(--line);
  background:#fff;font-family:inherit;text-align:left;cursor:pointer;transition:background .15s;min-width:0}
.step:last-child{border-right:0}
.step:hover{background:#f8fafd}
.step i{width:26px;height:26px;flex:none;border-radius:50%;background:#eef0f4;color:var(--muted);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-style:normal;font-weight:600}
.step span{display:flex;flex-direction:column;min-width:0;line-height:1.35}
.step b{font-size:13.5px;color:var(--text);font-weight:600;white-space:nowrap}
.step small{font-size:11.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.step.on{background:var(--brand-bg)}
.step.on i{background:var(--brand);color:#fff}
.step.on b{color:var(--brand)}
.step.done i{background:#e8f7ee;color:var(--ok)}
.step.done i::after{content:"✓"}
.step.done i{font-size:0}
.step.done i::after{font-size:13px}

/* 表单控件 */
.form-row textarea{line-height:1.65}
.pick-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pick-card{position:relative;display:flex;flex-direction:column;gap:4px;padding:14px 16px;border:1px solid var(--line);
  border-radius:10px;background:#fff;cursor:pointer;transition:all .15s}
.pick-card:hover{border-color:#c9d4e6}
.pick-card input{display:none}
.pick-card b{font-size:14px}
.pick-card span{font-size:12.5px;color:var(--muted);line-height:1.55}
.pick-card.on{border-color:var(--brand);background:var(--brand-bg);box-shadow:0 0 0 3px rgba(43,109,232,.10)}
.pick-card.on b{color:var(--brand)}

.pick-list{max-height:236px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:4px 12px;background:#fff}
.pick-list.tall{max-height:300px}
.pick-list .check-row{gap:10px}
.pick-list .check-row span{display:flex;flex-direction:column;min-width:0;line-height:1.4}
.pick-list .check-row b{font-size:13.5px;font-weight:600}
.chk-sub{font-style:normal;font-size:11.5px;color:var(--muted)}

.cover-picks{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.cover-pick{position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;cursor:pointer;
  display:block;background:#fff;transition:all .15s}
.cover-pick input{display:none}
.cover-pick img{width:100%;height:64px;object-fit:cover;display:block}
.cover-pick i{display:block;font-style:normal;font-size:11.5px;color:var(--muted);padding:4px 0;text-align:center}
.cover-pick:hover{border-color:#c9d4e6}
.cover-pick.on{border-color:var(--brand);box-shadow:0 0 0 3px rgba(43,109,232,.12)}
.cover-pick.on i{color:var(--brand);font-weight:600;background:var(--brand-bg)}

.pick-chips{display:flex;flex-wrap:wrap;gap:8px}
.pick-chip{display:inline-flex;align-items:center;padding:6px 14px;border:1px solid var(--line);border-radius:999px;
  font-size:13px;cursor:pointer;background:#fff;transition:all .15s;color:var(--text)}
.pick-chip input{display:none}
.pick-chip:hover{border-color:#c9d4e6}
.pick-chip.on{border-color:var(--brand);background:var(--brand-bg);color:var(--brand);font-weight:600}

.sch-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.sch-row .tb-input{width:118px}
.sch-row .tb-select{width:96px}
.sch-dur{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--muted)}
.sch-dur .tb-input{width:78px}

/* 行内错误 */
.has-err input,.has-err select,.has-err textarea,.has-err .pick-list,.has-err #sch-box{
  border-color:var(--danger)!important;box-shadow:0 0 0 3px rgba(220,38,38,.10)}
.err-tip{color:var(--danger);font-size:12.5px;margin-top:6px}

/* 底部操作条（吸底） */
.create-foot{position:sticky;bottom:0;z-index:5;display:flex;align-items:center;gap:12px;margin-top:16px;
  box-shadow:0 -6px 18px rgba(31,41,55,.06)}
.create-foot .foot-step{font-size:12.5px;color:var(--muted)}
.create-foot .foot-right{margin-left:auto;display:flex;align-items:center;gap:10px}

/* 右侧摘要 */
.sum-card .sum-cover{width:100%;aspect-ratio:16/9;border-radius:8px;overflow:hidden;background:#eef0f4;margin-bottom:12px}
.sum-card .sum-cover img{width:100%;height:100%;object-fit:cover;display:block}
.sum-name{font-size:14.5px;font-weight:700;line-height:1.45;margin-bottom:8px}
.sum-badges{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.sum-list{display:flex;flex-direction:column;gap:0;font-size:12.5px}
.sum-list div{display:flex;gap:10px;padding:7px 0;border-bottom:1px dashed var(--line)}
.sum-list div:last-child{border-bottom:0}
.sum-list dt{color:var(--muted);width:74px;flex:none}
.sum-list dd{color:var(--text);min-width:0;word-break:break-all;text-align:right;flex:1}

.chk-list{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:13px}
.chk-list li{display:flex;align-items:center;gap:9px;color:var(--muted)}
.chk-list li i{width:16px;height:16px;border-radius:50%;border:1px solid var(--line);flex:none;
  display:inline-flex;align-items:center;justify-content:center;font-style:normal;font-size:11px;background:#fff}
.chk-list li.ok{color:var(--text)}
.chk-list li.ok i{background:var(--ok);border-color:var(--ok);color:#fff}

@media (max-width:1100px){
  .form-grid2{grid-template-columns:1fr}
  .stepper{grid-template-columns:1fr 1fr}
  .step:nth-child(2){border-right:0}
  .step{border-bottom:1px solid var(--line)}
}
@media (max-width:760px){
  .pick-cards,.cover-picks{grid-template-columns:1fr 1fr}
  .create-foot{flex-wrap:wrap}
  .create-foot .foot-right{margin-left:0;width:100%}
}