/* ============================================================
   机器人维修班 · 教学培训平台  全局样式
   工业科技风：钢蓝主色 + 工业橙点缀
   ============================================================ */
:root{
  --blue:#1565C0;
  --blue-dark:#0D2B4E;
  --blue-deep:#081C36;
  --blue-soft:#E7F0FA;
  --accent:#FF7A00;
  --accent-soft:#FFF1E6;
  --ink:#1f2a37;
  --gray:#5b6b7a;
  --gray-light:#8da0b3;
  --bg:#F4F7FB;
  --card:#FFFFFF;
  --line:#E2E9F1;
  --green:#1E8E5A;
  --green-soft:#E6F5EE;
  --red:#C0392B;
  --red-soft:#FBECEA;
  --amber:#B9862B;
  --amber-soft:#FBF3E2;
  --radius:12px;
  --shadow:0 2px 10px rgba(13,43,78,.07);
  --shadow-lg:0 12px 34px rgba(13,43,78,.14);
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:100%;margin:0 auto;padding:0 24px}
/* 登录后页面扩展为全浏览器宽度，主区域不再局限于中间 1180px */
body.logged-in .wrap{max-width:100%;padding-left:28px;padding-right:28px}

/* 登录后：左侧保留角色导航侧边栏（#sideNav），顶栏保持横向 sticky 顶栏 */
@media (min-width: 861px) {
  body.logged-in .app-main { margin-left: 220px; }
  body.logged-in .site-foot { margin-left: 220px; }
  body.logged-in .nav-toggle { display: none; }
  /* 顶栏右侧账号区保持横向排列（⚙️账号设置 · 用户名 · 退出登录） */
  body.logged-in .head-auth { flex-direction: row; align-items: center; }
}
/* ---------- 成长中心 ---------- */
.g-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;margin-top:8px}
.g-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;box-shadow:var(--shadow)}
.g-item-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:10px}
.g-label{font-size:15px;color:var(--blue-dark);font-weight:600}
.g-value{font-size:20px;font-weight:700;color:var(--blue)}
.g-track{height:10px;background:#eef2f7;border-radius:20px;overflow:hidden}
.g-track i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),#1f8fd6);border-radius:20px}
.g-sub{margin-top:8px;font-size:13px;color:var(--gray)}
.g-item--level{display:flex;flex-direction:column;gap:6px;background:linear-gradient(135deg,#eaf3ff,#f6faff)}
.g-level{font-size:22px;font-weight:800;color:var(--blue-deep);padding:6px 0}

/* ---------- 机器人维修能力图谱 ---------- */
.cap-intro{margin:6px 0 4px;color:var(--gray);font-size:14px;line-height:1.7}
.cap-intro b{color:var(--blue)}
.cap-summary{display:flex;align-items:center;gap:22px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 24px;box-shadow:var(--shadow);margin-bottom:18px}
.cap-score{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:120px;padding:6px 18px;border-right:1px solid var(--line)}
.cap-score-num{font-size:46px;font-weight:800;color:var(--blue);line-height:1}
.cap-score-label{font-size:13px;color:var(--gray);margin-top:4px}
.cap-meta{display:flex;flex-direction:column;gap:6px}
.cap-level{font-size:22px;font-weight:800;color:var(--blue-deep)}
.cap-level-sub{font-size:13px;color:var(--gray)}
.cap-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:var(--shadow);margin-bottom:18px}
.cap-h{font-size:16px;font-weight:700;color:var(--blue-dark);margin:0 0 14px}
.cap-tree-wrap{width:100%;overflow-x:auto}
.cap-tree{width:100%;max-width:960px;height:auto;display:block;margin:0 auto}
.cap-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.cap-radar{width:100%;max-width:380px;height:auto;display:block;margin:0 auto}
.cap-bd{display:flex;flex-direction:column;gap:12px}
.cap-bd-row{border-bottom:1px dashed var(--line);padding-bottom:10px}
.cap-bd-name{font-size:14px;font-weight:600;color:var(--blue-dark);margin-bottom:6px}
.cap-bd-name b{color:var(--blue);font-size:16px}
.cap-bd-bars{display:flex;flex-direction:column;gap:4px}
.cap-bd-bar{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--gray)}
.cap-bd-src{width:64px;flex:none}
.cap-bd-track{flex:1;height:8px;background:#eef2f7;border-radius:20px;overflow:hidden}
.cap-bd-track i{display:block;height:100%;border-radius:20px}
.cap-bd-val{width:34px;text-align:right;flex:none;font-variant-numeric:tabular-nums;color:var(--blue-dark)}
.cap-legend-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.cap-legend-item{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:15px;color:var(--blue-dark)}
.cap-legend-dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:middle}
.cap-legend-sub{font-size:12px;color:var(--gray);margin-top:4px}
.cap-note{margin:14px 0 0;font-size:13px;color:var(--gray);line-height:1.7;background:#f8fafc;border-radius:10px;padding:10px 14px}
.cap-cta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:22px;padding:16px 20px;background:linear-gradient(135deg,#eaf3ff,#f6faff);border:1px solid #d6e6ff;border-radius:14px}
.cap-cta-sub{font-size:13px;color:var(--gray)}
@media(max-width:780px){.cap-row{grid-template-columns:1fr}.cap-summary{flex-direction:column;align-items:flex-start;gap:14px}.cap-score{border-right:none;border-bottom:1px solid var(--line);width:100%}}

.side-nav{display:none}
body.logged-in .side-nav{
  display:flex;flex-direction:column;gap:4px;
  position:fixed;top:68px;left:0;bottom:0;width:220px;
  padding:16px 12px;background:#fff;border-right:1px solid var(--line);
  overflow-y:auto;z-index:40;
}
.side-nav .side-title{font-size:12px;color:var(--gray);padding:10px 12px 4px;letter-spacing:.06em}
.side-nav a{display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:10px;color:var(--blue-dark);font-weight:500;font-size:15px;transition:.15s}
.side-nav a .nav-ico{font-size:16px;line-height:1}
.side-nav a:hover{background:#eef4fb}
.side-nav a.active{background:var(--blue);color:#fff}
/* 窄屏：左侧菜单改为可滑出的抽屉，保证「成长中心」等入口始终可用 */
.side-toggle{display:none}
body.logged-in .side-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;margin-left:10px;border:1px solid var(--line);
  border-radius:10px;background:#fff;cursor:pointer;font-size:18px;color:var(--blue-dark);flex:0 0 auto
}
.side-backdrop{display:none;position:fixed;inset:0;background:rgba(8,28,54,.45);z-index:55}
@media(max-width:880px){
  body.logged-in .side-toggle{display:inline-flex}
  body.logged-in .app-main{margin-left:0}
  body.logged-in .site-foot{margin-left:0}
  .side-nav{
    top:0;left:0;bottom:0;width:240px;z-index:60;
    padding-top:66px;box-shadow:2px 0 18px rgba(13,43,78,.18);
    transform:translateX(-100%);transition:transform .22s ease
  }
  body.logged-in .side-nav.open{transform:translateX(0)}
  .side-backdrop.show{display:block}
}
.hidden{display:none !important}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}.mt32{margin-top:32px}
.text-gray{color:var(--gray)}
.text-small{font-size:13px}
.flex-between{display:flex;align-items:center;justify-content:space-between;gap:12px}
.text-center{text-align:center}
.text-red{color:#d92d20}
/* 已冻结学员行：灰化提示，但保持文字可读 */
.data-table tr.row-frozen{background:#fafbfc}
.data-table tr.row-frozen td{color:var(--gray)}
.data-table tr.row-frozen td b{color:var(--gray)}

/* ---------- 头部信息（合并自原顶部信息条，避免与导航栏重复显示登录/注册） ---------- */
.head-info{margin-left:18px;flex:0 1 auto;min-width:0;color:var(--gray);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
body.logged-in .head-info{display:none}
/* 登录后：主菜单仅在左侧 #sideNav 显示，顶栏不再重复横向主菜单 */
body.logged-in #mainNav{display:none}
/* 顶栏右侧账号区：⚙️账号设置 · 登录账号信息 · 退出登录，统一靠右 */
body.logged-in .head-auth{margin-left:auto;flex-direction:row;align-items:center}
/* 窄屏下隐藏热线，把空间让给导航与登录，避免顶栏折行 */
@media(max-width:1080px){.head-info{display:none}}

/* ---------- 头部 ---------- */
.site-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(13,43,78,.04)}
.head-inner{display:flex;align-items:center;height:68px;gap:14px;flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{width:46px;height:46px;flex:0 0 46px;display:flex;align-items:center;justify-content:center;background:var(--blue-soft);border-radius:12px}
.brand-text strong{font-size:18px;color:var(--blue-dark);letter-spacing:.5px;display:block;line-height:1.2}
.brand-text small{font-size:11px;color:var(--gray-light);letter-spacing:1px}
.main-nav{display:flex;gap:4px;margin-left:auto;flex-wrap:nowrap}
.main-nav a{padding:9px 14px;border-radius:8px;font-size:15px;color:var(--blue-dark);font-weight:500;transition:.15s;display:inline-flex;align-items:center;white-space:nowrap}
.main-nav a:hover{background:var(--blue-soft);color:var(--blue)}
.main-nav a.active{background:var(--blue);color:#fff}
/* 统一的菜单图标样式（所有角色共用） */
.main-nav a .nav-ico, .drawerNav a .nav-ico{display:inline-block;width:1.25em;text-align:center;margin-right:6px;line-height:1}
.head-auth{display:flex;align-items:center;gap:8px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto}
.nav-toggle span{width:24px;height:3px;background:var(--blue-dark);border-radius:2px;transition:.2s}
.nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
.mobile-drawer{display:none;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:10px 20px 18px}
.mobile-drawer.open{display:flex}
.mobile-drawer a{padding:12px 6px;border-bottom:1px solid var(--line);font-size:16px;color:var(--blue-dark)}
.drawer-auth{display:flex;gap:10px;margin-top:12px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:9px;border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:.15s;font-family:inherit;line-height:1.2}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-sm{padding:7px 14px;font-size:13px}
.btn-lg{padding:13px 30px;font-size:16px}
.btn-block{width:100%}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#11529f}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#e66e00}
.btn-outline{background:#fff;color:var(--blue);border-color:var(--blue)}
.btn-outline:hover{background:var(--blue-soft)}
.btn-ghost{background:transparent;color:var(--blue-dark);border-color:var(--line)}
.btn-ghost:hover{background:var(--blue-soft)}
.btn-danger{background:var(--red);color:#fff}
.btn-danger:hover{background:#a93226}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:#a93226}
.btn-gold{background:#C9A063;color:#fff}
.btn-gold:hover{background:#b8894c}
.btn-info{background:var(--blue-dark);color:#fff}
.btn-info:hover{background:#0d2a4d}

/* 渲染后的 Markdown 资料 */
.md-body{font-size:15px;line-height:1.9;color:var(--ink)}
.md-body h2,.md-body h3,.md-body h4{color:var(--blue-dark);margin:18px 0 8px;line-height:1.4}
.md-body h2{font-size:21px}.md-body h3{font-size:18px}.md-body h4{font-size:16px}
.md-body p{margin:8px 0}
.md-body ul{margin:8px 0 8px 22px}
.md-body li{margin:4px 0}
.md-body blockquote{margin:12px 0;padding:10px 16px;background:var(--blue-soft);border-left:4px solid var(--blue);border-radius:6px;color:var(--blue-dark)}
.md-body code{background:#eef2f7;padding:2px 6px;border-radius:4px;font-family:Consolas,Monaco,monospace;font-size:13.5px;color:#b4433a}
.md-body hr{border:0;border-top:1px solid var(--line);margin:16px 0}
.md-table{width:100%;border-collapse:collapse;margin:12px 0;font-size:14px}
.md-table th{background:var(--blue-soft);color:var(--blue-dark);text-align:left;padding:9px 12px;border:1px solid var(--line)}
.md-table td{padding:9px 12px;border:1px solid var(--line)}

/* ---------- 主区域 ---------- */
.app-main{min-height:60vh;padding:28px 0 50px}
.section{padding:54px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{text-align:center;margin-bottom:34px}
.sec-kicker{font-size:13px;letter-spacing:3px;color:var(--accent);font-weight:700}
.sec-head h2{font-size:28px;color:var(--blue-dark);margin:8px 0 6px}
.sec-divider{width:54px;height:3px;background:var(--accent);margin:12px auto 0;border-radius:2px}
.sec-sub{color:var(--gray);margin-top:8px}

/* ---------- HERO ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--blue-deep),var(--blue) 60%,#1f7ad6);color:#fff}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:38px 38px;opacity:.5}
.hero::after{content:"";position:absolute;right:-120px;top:-80px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,122,0,.35),transparent 65%)}
.hero-inner{position:relative;z-index:2;padding:74px 0 64px;display:flex;flex-direction:column;align-items:flex-start}
.hero-tag{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);padding:6px 16px;border-radius:30px;font-size:13px;letter-spacing:1px;margin-bottom:18px}
.hero h1{font-size:44px;line-height:1.2;font-weight:800;letter-spacing:1px}
.hero h1 em{color:#FFC107;font-style:normal}
.hero-sub{margin:18px 0 28px;max-width:620px;color:#d6e4f4;font-size:16px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:42px;flex-wrap:wrap}
.hero-stat b{font-size:30px;color:#fff;display:block}
.hero-stat span{font-size:13px;color:#bcd2ea}

/* ---------- 通知条 ---------- */
.notice-bar{background:#fff;border-bottom:1px solid var(--line)}
.notice-inner{display:flex;align-items:center;gap:14px;height:46px;overflow:hidden}
.notice-label{display:flex;align-items:center;gap:6px;color:var(--accent);font-weight:700;white-space:nowrap}
.notice-track{flex:1;overflow:hidden}
.notice-list{display:flex;gap:40px;white-space:nowrap;animation:marquee 22s linear infinite;list-style:none}
.notice-list li{font-size:14px;color:var(--gray)}
.notice-list b{color:var(--blue)}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 卡片网格 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media(max-width:980px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-3,.grid-2{grid-template-columns:1fr}}

.course-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfe0f3}
/* 老师「课程教学」操作菜单 */
.op-grid{gap:18px}
.op-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;transition:.18s;text-decoration:none;color:inherit}
.op-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfe0f3}
.op-ico{width:54px;height:54px;border-radius:14px;background:var(--blue-soft);display:flex;align-items:center;justify-content:center;font-size:26px}
.op-t{font-size:17px;font-weight:700;color:var(--blue-dark)}
.op-d{font-size:13px;color:var(--gray)}
.course-cover{height:118px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:40px;background:linear-gradient(135deg,#1565C0,#1f8fd6)}
.course-body{padding:16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.course-body h3{font-size:17px;color:var(--blue-dark)}
.course-meta{font-size:13px;color:var(--gray)}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600;line-height:1.4}
.badge-blue{background:var(--blue-soft);color:var(--blue)}
.badge-accent{background:var(--accent-soft);color:var(--accent)}
.badge-green{background:var(--green-soft);color:var(--green)}
.badge-red{background:var(--red-soft);color:var(--red)}
.badge-amber{background:var(--amber-soft);color:var(--amber)}
.badge-gray{background:#eef2f7;color:var(--gray)}
.badge-xs{padding:1px 8px;font-size:11px;border-radius:14px}

/* ---------- 教务系统：排课表 ---------- */
.schedule-table{border-collapse:separate;border-spacing:0;font-size:13px;min-width:760px}
.schedule-table th,.schedule-table td{border:1px solid var(--line);padding:6px 8px;vertical-align:top}
.schedule-table .sch-corner{background:#f3f7fc;text-align:center;width:92px}
.schedule-table .sch-period{background:#f3f7fc;text-align:center;line-height:1.3;width:120px}
.schedule-table .sch-date{background:#f7faff;text-align:center;white-space:nowrap;font-weight:600}
.schedule-table .sch-cell{height:64px;cursor:pointer;transition:.12s}
.schedule-table .sch-cell:hover{background:#eef6ff}
.schedule-table .sch-empty{color:var(--gray);text-align:center}
.schedule-table .sch-empty .sch-plus{font-size:18px;color:#b8c6d6}
.schedule-table .sch-has{background:#fff}
.schedule-table .sch-has .sch-course{font-weight:600;color:var(--blue-dark);margin-bottom:2px}
.schedule-table .sch-has .sch-meta{font-size:11px;color:var(--gray);line-height:1.5}
.schedule-table .sch-has .sch-note{font-size:11px;color:var(--amber);margin-top:2px}
.schedule-table .sch-rest{background:#f3f3f3;color:var(--gray);text-align:center}
.schedule-table tr.sch-off .sch-date{color:var(--gray)}
.schedule-table tr.sch-off .sch-rest{font-style:italic}

/* ---------- 上课日期 chips ---------- */
.date-grid{display:flex;flex-wrap:wrap;gap:10px}
.date-chip{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:84px;padding:10px 8px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;transition:.12s;font-family:inherit}
.date-chip:hover{box-shadow:var(--shadow);border-color:#cfe0f3}
.date-chip b{font-size:15px;color:var(--blue-dark)}
.date-chip span{font-size:12px;color:var(--gray)}
.date-chip i{font-size:12px;font-style:normal;color:var(--green)}
.date-chip.off{background:#f3f3f3;border-style:dashed}
.date-chip.off i{color:var(--gray)}

/* 上课日期：每天三段（上午/下午/晚上）可选卡片 */
.date-card{display:flex;flex-direction:column;gap:8px;min-width:128px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;transition:.12s}
.date-card:hover{box-shadow:var(--shadow);border-color:#cfe0f3}
.date-card.off{background:#f3f3f3;border-style:dashed}
.dc-top{display:flex;align-items:center;gap:8px}
.dc-top b{font-size:15px;color:var(--blue-dark)}
.dc-top span{font-size:12px;color:var(--gray)}
.dc-rest{margin-left:auto;border:1px solid var(--line);background:#fff;color:var(--gray);border-radius:8px;padding:2px 9px;font-size:12px;cursor:pointer;font-family:inherit}
.dc-rest.on{background:var(--red-soft);color:var(--red);border-color:var(--red-soft)}
.dc-segs{display:flex;gap:6px}
.seg-chip{flex:1;text-align:center;padding:5px 0;border:1px solid var(--line);border-radius:8px;font-size:12px;color:var(--gray);background:#f7f9fc;cursor:pointer;user-select:none;transition:.12s}
.seg-chip.on{background:var(--blue-soft);color:var(--blue);border-color:var(--blue-soft);font-weight:600}
.seg-chip:hover{border-color:#cfe0f3}
/* 上课日期卡片：周末 / 节假日标记 */
.dc-kind{font-size:11px;padding:1px 7px;border-radius:6px;font-weight:600;margin-left:2px}
.dc-kind.weekend{background:#fff3e0;color:#b26a00;border:1px solid #ffe0b2}
.dc-kind.holiday{background:#fde8ef;color:#c2185b;border:1px solid #f8c6db}
.date-card.special{border-color:#ffe0b2}
.date-card.special.off{border-color:#f8c6db}
/* 弹出框内「选择老师」单选列表 */
.opt-list{display:flex;flex-direction:column;gap:6px;max-height:320px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:8px}
.opt-row{display:flex;align-items:center;gap:8px;padding:7px 9px;border-radius:8px;cursor:pointer;transition:.1s}
.opt-row:hover{background:#f3f7fc}
.opt-row input{margin:0}

/* 课程统计弹窗内的统计格 */
.stat-grid{display:flex;flex-wrap:wrap;gap:10px}
.stat-box{flex:1;min-width:92px;background:#f5f7fa;border:1px solid var(--line);border-radius:10px;padding:10px 12px;text-align:center}
.stat-box .v{font-size:20px;font-weight:700;color:var(--blue-dark)}
.stat-box .l{font-size:12px;color:var(--gray);margin-top:2px}

/* 作业 / 考卷列表：班级人数统计条与“已交/总数”列 */
.hw-stat{font-size:13px;color:var(--gray);background:var(--amber-soft);border:1px solid var(--amber-soft);border-radius:8px;padding:6px 12px;display:inline-block}
.hw-stat b{color:var(--amber);font-size:15px}
.hw-cnt{font-weight:600;white-space:nowrap}

/* 基地管理员列表行 */
.ba-row{line-height:1.6;margin:2px 0}
.ba-row + .ba-row{border-top:1px dashed var(--line);padding-top:2px}
.panel-sub{background:#f7faff;border:1px solid var(--line);border-radius:10px;padding:14px}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.about-text h2{font-size:26px;color:var(--blue-dark);margin:6px 0 12px}
.about-text p{color:var(--gray);margin-bottom:12px}
.about-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:18px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px}
.stat-card b{display:block;font-size:24px;color:var(--blue)}
.stat-card span{font-size:13px;color:var(--gray)}
.about-img{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,#1565C0,#0D2B4E);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;color:#9fc0e8}

.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
@media(max-width:820px){.steps{grid-template-columns:repeat(2,1fr)}}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 16px;text-align:center}
.step-ico{width:48px;height:48px;border-radius:12px;background:var(--blue-soft);display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.step h4{font-size:16px;color:var(--blue-dark)}
.step p{font-size:13px;color:var(--gray);margin-top:4px}

.cta-banner{background:linear-gradient(135deg,var(--blue-deep),var(--blue));border-radius:16px;padding:34px 40px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#fff;flex-wrap:wrap}
.cta-banner h2{font-size:24px;margin-bottom:6px}
.cta-banner p{color:#cfe0f3}

/* ---------- 页面通用 ---------- */
.page{padding-top:8px}
.page-head{margin-bottom:26px}
.crumb{font-size:13px;color:var(--gray-light);margin-bottom:8px}
.crumb a:hover{color:var(--blue)}
.page-head h1{font-size:28px;color:var(--blue-dark)}
.page-head p{color:var(--gray);margin-top:6px}

/* 课程详情 topbar：班级 + 老师 + 返回 同一行 */
.course-head-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.course-head-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.course-teacher{font-size:14px;color:var(--gray);font-weight:600;white-space:nowrap}
.course-teacher-none{color:var(--gray-light);font-weight:500;font-style:italic}

.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:22px;box-shadow:var(--shadow)}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.panel-head h2{font-size:19px;color:var(--blue-dark)}
.panel-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.input-sm{height:34px;padding:6px 10px;font-size:13px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
.input-sm:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
/* 下拉框按内容自适应高度，避免固定高度裁切文字 */
select.input-sm{height:auto;min-height:36px;line-height:1.5;padding:7px 30px 7px 10px;width:auto;min-width:170px}

/* ---------- 表单 ---------- */
.auth-wrap{max-width:440px;margin:30px auto}
.auth-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px 32px;box-shadow:var(--shadow-lg)}
.auth-card h1{font-size:24px;color:var(--blue-dark);text-align:center}
.auth-sub{text-align:center;color:var(--gray);font-size:14px;margin:6px 0 18px}
.form-tip{background:var(--blue-soft);border:1px solid #cfe0f3;color:var(--blue-dark);padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:16px}
.form-links{display:flex;justify-content:space-between;margin-top:16px;font-size:14px}
.form-links a{color:var(--blue)}
.form-links a:hover{text-decoration:underline}
.field{margin-bottom:16px}
.field-row{display:flex;gap:14px}
.field-row .field{flex:1}
.field label{display:block;font-size:14px;color:var(--blue-dark);margin-bottom:6px;font-weight:500}
.req{color:var(--red);margin-left:3px}
.input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink);transition:.15s}
.input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(21,101,192,.15)}
/* 登录密码框：收紧密文圆点间距。原生密码框默认字间距偏宽，需显式用负值 letter-spacing 才能缩短（normal 即浏览器默认宽间距，无效） */
.input[type="password"]{font-family:inherit;letter-spacing:-1px}
select.input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235b6b7a' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:32px}
.field.error .input{border-color:var(--red);box-shadow:0 0 0 3px rgba(192,57,43,.12)}
.form-err{color:var(--red);font-size:12.5px;margin-top:5px;min-height:0}
.agree{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--gray)}
.agree input{margin-top:3px}
.tabs{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap}
.tab{padding:9px 18px;border-radius:9px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:15px;font-weight:600;color:var(--gray)}
.tab.active{background:var(--blue);color:#fff;border-color:var(--blue)}
.tab-return{margin-left:auto;display:inline-flex;align-items:center;padding:9px 18px;border-radius:9px;border:1px solid var(--line);background:#fff;font-size:15px;font-weight:600;color:var(--blue-dark);text-decoration:none}
.tab-return:hover{background:var(--blue-soft);color:var(--blue)}

/* ---------- 表格 ---------- */
.table-scroll{overflow-x:auto;border-radius:10px;border:1px solid var(--line)}
.data-table{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}
.data-table th{background:var(--blue-soft);color:var(--blue-dark);text-align:left;padding:12px 14px;font-weight:600;white-space:nowrap}
.data-table td{padding:11px 14px;border-top:1px solid var(--line);color:var(--ink)}
.data-table tr:hover td{background:#fafcff}

.empty{text-align:center;padding:50px 20px;color:var(--gray-light)}
.empty-ico{font-size:42px;margin-bottom:10px}

/* ---------- 进度 ---------- */
.progress{position:relative;height:8px;background:#e9eef5;border-radius:20px;overflow:hidden;flex:1}
.progress i{position:absolute;left:0;top:0;bottom:0;background:linear-gradient(90deg,var(--blue),#1f8fd6);border-radius:20px;transition:width .4s}
.progress-line{display:flex;align-items:center;gap:10px}
.progress-line .progress{min-width:120px}
.progress-line span{font-size:13px;color:var(--blue-dark);font-weight:600;white-space:nowrap}

/* ---------- 资料列表 ---------- */
.mat-list{display:flex;flex-direction:column;gap:12px}
.mat-item{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;transition:.15s}
.mat-item:hover{border-color:#cfe0f3;box-shadow:var(--shadow)}
.mat-ico{width:46px;height:46px;border-radius:10px;flex:0 0 46px;display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff}
.mat-book{background:#1565C0}.mat-ppt{background:#C0392B}.mat-reference{background:#1E8E5A}.mat-video{background:var(--accent)}
.mat-info{flex:1;min-width:0}
.mat-info h4{font-size:16px;color:var(--blue-dark)}
.mat-info p{font-size:13px;color:var(--gray);margin-top:2px}
.mat-actions{display:flex;gap:8px;flex-wrap:wrap}
.mat-cat{margin-bottom:18px}
.mat-cat:last-child{margin-bottom:0}
.mat-cat-head{font-size:15px;font-weight:700;color:var(--blue-dark);margin:6px 0 10px;display:flex;align-items:center;gap:6px}
.mat-cat .mat-list{gap:10px}
.empty-sm{padding:22px 0}
.empty-sm .empty-ico{font-size:30px}

/* ---------- 考试 ---------- */
.q-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin-bottom:16px}
.q-head{display:flex;gap:12px;align-items:flex-start}
.q-no{width:30px;height:30px;border-radius:8px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex:0 0 30px}
.q-type{margin-right:8px}
.q-title{font-size:15.5px;color:var(--ink)}
.q-options{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.q-opt{display:flex;align-items:center;gap:10px;padding:11px 14px;border:1px solid var(--line);border-radius:9px;cursor:pointer;transition:.12s;font-size:15px}
.q-opt:hover{background:var(--blue-soft);border-color:#cfe0f3}
.q-opt input{width:18px;height:18px;accent-color:var(--blue)}
.q-opt.right{background:var(--green-soft);border-color:var(--green)}
.q-opt.wrong{background:var(--red-soft);border-color:var(--red)}

/* ---------- 老师功能模块（卡片 / 题库 / 选项） ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#cfe0f3}
.card-body{padding:16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-body h3,.card-body h4{font-size:17px;color:var(--blue-dark)}
.quiz-list{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:16px}
.quiz-item{line-height:1.7}
.quiz-q{font-size:15.5px;color:var(--ink);margin-bottom:6px}
.opt-list{display:flex;flex-direction:column;gap:6px;padding-left:4px}
.opt{display:inline-block;padding:4px 12px;border:1px dashed var(--line);border-radius:8px;font-size:14px;background:#fbfdff}
.opt-ans{background:var(--green-soft);border:1px solid var(--green);color:#1d6b3f;font-weight:600}
.md-scroll{max-height:62vh;overflow:auto}
.md-body{padding:6px 2px;line-height:1.8;font-size:15px}
.md-body h1,.md-body h2,.md-body h3{margin:18px 0 8px;color:var(--blue-dark)}
.md-body ul{margin:8px 0;padding-left:22px}
.md-body li{margin:4px 0}
.md-body code{background:#eef2f7;padding:1px 6px;border-radius:5px;font-size:13px}
.md-body p{margin:8px 0}
.exam-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:18px;flex-wrap:wrap;position:sticky;top:74px;z-index:20;box-shadow:var(--shadow)}
.exam-timer{font-size:22px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums}
.result-hero{text-align:center;padding:20px;border-radius:12px;background:var(--blue-soft)}
.result-score{font-size:54px;font-weight:800;color:var(--blue)}
.result-score small{font-size:16px;color:var(--gray);font-weight:500}

/* ---------- 证书 ---------- */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.cert-mini{background:linear-gradient(135deg,var(--blue-deep),var(--blue));color:#fff;padding:22px 20px;text-align:center}
.cm-title{font-size:20px;letter-spacing:6px;font-weight:800}
.cm-name{font-size:14px;margin-top:8px;color:#d6e4f4}
.cert-body{padding:16px 18px}
.cert-paper{background:#FDFBF3;border:2px solid var(--accent);outline:8px double var(--accent);outline-offset:-12px;padding:40px 50px;text-align:center;color:#3A3225;max-width:760px;margin:0 auto}
.cp-school{font-size:28px;color:var(--blue-dark);letter-spacing:6px;font-weight:800}
.cp-en{font-size:12px;letter-spacing:3px;color:#8B7D5F;margin-top:4px}
.cp-title{font-size:42px;letter-spacing:14px;margin:26px 0 8px;color:#7A5C1E;font-weight:800}
.cp-body{font-size:16px;line-height:2.2;text-align:justify;margin:20px auto;max-width:600px;text-indent:2em}
.cp-body b{color:var(--blue-dark);border-bottom:1px solid var(--accent);padding:0 6px}
.cp-foot{display:flex;justify-content:space-between;align-items:flex-end;margin-top:30px;font-size:14px;text-align:left}
.cp-no{color:#8B7D5F}
.cert-seal{width:110px;height:110px;border:4px solid rgba(200,45,36,.82);border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;color:rgba(200,45,36,.88);transform:rotate(-8deg);font-size:13px;line-height:1.6;text-align:center}

/* ---------- 模态 ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(8,28,54,.55);display:flex;align-items:flex-start;justify-content:center;padding:60px 16px;z-index:100;overflow:auto}
.modal-box{background:#fff;border-radius:14px;max-width:560px;width:100%;box-shadow:var(--shadow-lg);animation:pop .18s ease}
.modal-box.wide{max-width:880px}
@keyframes pop{from{transform:translateY(12px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--line)}
.modal-head h3{font-size:18px;color:var(--blue-dark)}
.modal-close{background:none;border:0;font-size:26px;line-height:1;color:var(--gray);cursor:pointer}
.modal-body{padding:22px;max-height:70vh;overflow:auto}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;padding:16px 22px;border-top:1px solid var(--line)}

/* ---------- Toast ---------- */
#toastRoot{position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:10px;align-items:center}
.toast{background:var(--blue-deep);color:#fff;padding:11px 20px;border-radius:9px;font-size:14px;box-shadow:var(--shadow-lg);animation:slideIn .25s ease}
.toast.success{background:var(--green)}
.toast.error{background:var(--red)}
@keyframes slideIn{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}
.spin{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 学员卡片（首页统计） ---------- */
.grade-cards{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.grade-card{flex:1;min-width:160px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;text-align:center}
.grade-card b{font-size:30px;color:var(--blue);display:block}
.grade-card span{font-size:13px;color:var(--gray)}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--blue-deep);color:#bcd2ea;margin-top:30px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding:46px 20px 30px}
.foot-col .foot-title{font-size:18px;color:#fff;margin-bottom:12px;font-weight:700}
.foot-col h4{font-size:15px;color:#fff;margin-bottom:12px}
.foot-col a,.foot-col p{display:block;color:#9fb6d4;font-size:14px;margin-bottom:8px}
.foot-col a:hover{color:#fff}
.foot-copy{background:#06182d;border-top:1px solid #14335a;font-size:13px;color:#7e97b8}
.foot-copy .wrap{display:flex;justify-content:space-between;padding:14px 20px;flex-wrap:wrap;gap:8px}

/* ---------- 响应式 ---------- */
@media(max-width:860px){
  .main-nav{display:none}
  .main-nav.open{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:#fff;padding:10px 20px;box-shadow:var(--shadow-lg);border-bottom:1px solid var(--line)}
  .head-auth{display:none}
  .head-info{display:none}
  .nav-toggle{display:flex}
  .about-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:34px}
  .hero-stats{gap:20px}
  .exam-bar{position:static}
}
@media(max-width:480px){
  .foot-grid{grid-template-columns:1fr}
  .page-head h1{font-size:23px}
}

/* ---------- 多选框组（老师任教学科） ---------- */
.chk-group{display:flex;flex-wrap:wrap;gap:10px 18px;padding:8px 2px}
.chk{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--ink);cursor:pointer;user-select:none}
.chk input{width:16px;height:16px;accent-color:var(--blue);cursor:pointer}

/* ============================================================
   学生端（伯乐桥移植）：我的考卷 / 岗位匹配
   ============================================================ */
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:22px}
@media(max-width:980px){.detail-grid{grid-template-columns:1fr}}
.stu-card{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
.stu-card .card-header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.stu-card .card-title{font-size:16px;font-weight:700;color:var(--blue-dark)}

/* 岗位匹配卡片 */
.job-card{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line);cursor:pointer;transition:all .2s ease}
.job-card:hover{background:var(--blue-soft)}
.job-card--top{background:var(--green-soft)}
.job-card--selected{background:var(--accent-soft);border-left:3px solid var(--accent)}
.job-card__info{flex:1;min-width:0}
.job-card__title{font-weight:600;font-size:15px;margin-bottom:2px;color:var(--blue-dark)}
.job-card__meta{font-size:12px;color:var(--gray);margin-bottom:4px}
.job-card__desc{font-size:12px;color:var(--gray-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.job-card__match{display:flex;align-items:center;gap:6px;flex-shrink:0;margin-left:10px}
.job-card__pct{font-weight:700;font-size:15px;color:var(--green);min-width:40px;text-align:center}

/* ============================================================
   故障案例库（机器人故障诊断训练）
   ============================================================ */
.kb-intro{color:var(--gray);font-size:14px;margin:6px 0 0;max-width:860px}
.kb-stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
.kb-stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 18px;display:flex;align-items:baseline;gap:6px;box-shadow:var(--shadow)}
.kb-stat b{font-size:22px;color:var(--blue-dark);font-weight:800}
.kb-stat span{font-size:13px;color:var(--gray)}
.kb-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;align-items:center}
.kb-tabs-label{font-weight:700;color:var(--blue-dark);font-size:14px;margin-right:2px}
/* 故障分类下拉菜单（pulldown）：替代原先一分类一按钮的排布，压缩纵向空间 */
.kb-select{max-width:320px;padding:8px 12px;border:1.5px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink);font-size:13.5px;font-weight:600;font-family:inherit;
  cursor:pointer;line-height:1.4;transition:.15s}
.kb-select:hover{border-color:var(--blue);color:var(--blue)}
.kb-select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.kb-tab{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:1.5px solid var(--line);border-radius:24px;background:#fff;color:var(--ink);font-size:13.5px;font-weight:600;cursor:pointer;transition:.15s;font-family:inherit;line-height:1}
.kb-tab:hover{border-color:var(--blue);color:var(--blue)}
.kb-tab.active{background:var(--blue);border-color:var(--blue);color:#fff}
.kb-tab b{background:var(--accent-soft);color:var(--accent);font-size:12px;padding:2px 8px;border-radius:12px;font-weight:700;transition:.15s}
.kb-tab.active b{background:rgba(255,255,255,.22);color:#fff}
.kb-cat-count{font-size:12.5px;color:var(--gray-light);font-weight:600;margin-left:8px}
.kb-list{margin-top:20px}
.kb-cat{font-size:16px;font-weight:700;color:var(--blue-dark);margin:22px 0 10px;border-left:4px solid var(--accent);padding-left:10px}
.kb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.kb-card{display:flex;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow);transition:.16s;text-decoration:none;color:inherit}
.kb-card:hover{transform:translateY(-2px);border-color:var(--blue);box-shadow:var(--shadow-lg)}
.kb-card-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.kb-code{display:inline-flex;align-items:center;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:12.5px;padding:3px 10px;border-radius:20px;font-family:Consolas,Monaco,monospace}
.kb-card-model{font-size:12px;color:var(--gray-light)}
.kb-title{font-weight:700;font-size:16px;color:var(--blue-dark);line-height:1.4}
.kb-q{font-size:13.5px;color:var(--gray);line-height:1.5}
.kb-card-foot{margin-top:auto;font-size:13px;font-weight:600;color:var(--blue)}
.kb-detail{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:18px}
@media(max-width:880px){.kb-detail{grid-template-columns:1fr}}
.kb-detail-info{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.kb-detail-info h2{font-size:20px;color:var(--blue-dark);margin:0 0 10px}
.kb-pheno{background:var(--blue-soft);border-left:4px solid var(--blue);border-radius:8px;padding:12px 14px;color:var(--blue-dark);font-size:14px;line-height:1.6;margin-bottom:14px}
.kb-info-row{display:flex;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px}
.kb-info-k{flex:0 0 96px;color:var(--gray);font-weight:600}
.kb-info-v{color:var(--ink);flex:1}
.kb-media{margin:12px 0}
.kb-media img{max-width:100%;border:1px solid var(--line);border-radius:10px;background:#f6f8fb}
.kb-media-cap{font-size:12px;color:var(--gray-light);margin-top:4px}
.kb-train{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.kb-question{font-size:17px;font-weight:700;color:var(--blue-dark);margin-bottom:16px;line-height:1.5}
.kb-opts{display:flex;flex-direction:column;gap:10px}
.kb-opt{display:flex;align-items:center;gap:10px;padding:13px 16px;border:1.5px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;transition:.12s;font-size:15px;text-align:left;font-family:inherit;color:var(--ink)}
.kb-opt:hover{background:var(--blue-soft);border-color:var(--blue)}
.kb-opt b{color:var(--blue);flex:0 0 auto}
.kb-opt.done{cursor:default}
.kb-opt.correct{background:var(--green-soft);border-color:var(--green);color:#0f5c39}
.kb-opt.correct b{color:var(--green)}

/* ===== 运营驾驶舱 ===== */
.cockpit-kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:22px}
.ckpi{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 16px;box-shadow:var(--shadow);text-align:center}
.ckpi-num{font-size:30px;font-weight:800;color:var(--blue-deep);line-height:1.1}
.ckpi-unit{font-size:14px;font-weight:600;color:var(--gray);margin-left:3px}
.ckpi-label{font-size:14px;color:var(--gray);margin-top:6px}
.cockpit-block{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow);margin-bottom:18px}
.cb-title{font-size:16px;font-weight:700;color:var(--blue-dark);margin-bottom:14px;padding-left:10px;border-left:4px solid var(--blue)}
.cockpit-funnel{display:flex;flex-direction:column;gap:8px}
.cf-stage{display:flex;align-items:center;gap:10px}
.cf-bar{display:flex;align-items:center;justify-content:space-between;min-width:160px;height:38px;padding:0 14px;border-radius:8px;background:linear-gradient(90deg,var(--blue),var(--blue-deep));color:#fff;font-weight:600;transition:width .4s}
.cf-bar .cf-val{font-size:15px}
.cf-rate{font-size:13px;color:var(--gray);white-space:nowrap}
.cockpit-assets{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.ca-item{background:var(--blue-soft);border-radius:12px;padding:16px 10px;text-align:center}
.ca-num{font-size:26px;font-weight:800;color:var(--blue-deep)}
.ca-label{font-size:13px;color:var(--gray);margin-top:4px}
.cockpit-diag{display:flex;align-items:flex-start;gap:14px;background:#fff7ed;border:1px solid #fed7aa;border-radius:14px;padding:18px 20px;margin-top:4px}
.cockpit-diag .cd-ico{font-size:26px;line-height:1}
.cockpit-diag .cd-title{font-size:16px;font-weight:700;color:#9a3412}
.cockpit-diag .cd-sub{font-size:14px;color:#7c2d12;margin-top:4px}
.cockpit-diag .cd-sub b{color:#c2410c}
@media(max-width:860px){.cockpit-kpis{grid-template-columns:repeat(2,1fr)}.cockpit-assets{grid-template-columns:repeat(2,1fr)}}

.kb-opt.wrong{background:#fdeceb;border-color:#e0706a;color:#9b2c24}
.kb-opt.wrong b{color:#c23a2f}
.kb-feedback{margin-top:18px;border-radius:12px;padding:14px 16px;font-size:14.5px;line-height:1.6}
.kb-feedback.ok{background:var(--green-soft);border:1px solid #bfe6d2;color:#0f5c39}
.kb-feedback.no{background:#fff4e8;border:1px solid #f3cda0;color:#8a531a}
.kb-fb-head{font-weight:700;margin-bottom:6px}
.kb-proc{margin-top:16px;background:#f7faff;border:1px solid var(--line);border-radius:12px;padding:16px}
.kb-proc-title{font-weight:700;color:var(--blue-dark);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.kb-proc-title::before{content:"🛠";}
.kb-proc-list{margin:0;padding-left:22px;display:flex;flex-direction:column;gap:8px}
.kb-proc-list li{font-size:14.5px;color:var(--ink);line-height:1.5}
.kb-again{margin-top:16px;display:flex;gap:10px}
.kb-back{margin-top:16px}
.link-back{color:var(--blue);font-size:14px;text-decoration:none;font-weight:600}
.link-back:hover{text-decoration:underline}
.file-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 10px;background:#f7f9fc;border:1px solid var(--line);border-radius:8px;margin-bottom:8px}
.file-row:last-child{margin-bottom:0}
.file-row .link{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}
.kb-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:18px;font-size:14px}
.kb-table th,.kb-table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
.kb-table th{background:var(--blue-soft);color:var(--blue-dark);font-weight:700}
.kb-table tr:last-child td{border-bottom:none}
.kb-ops{display:flex;gap:8px}
.kb-edit-form .form-row{margin-bottom:14px}
.kb-edit-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:8px}
.kb-opt-key{flex:0 0 auto;font-weight:700;color:var(--blue);width:24px}
.kb-edit-opt{display:flex;align-items:center;gap:8px}
.kb-edit-fb{margin-top:4px}
@media(max-width:600px){.kb-edit-grid{grid-template-columns:1fr}}

/* ===== 平台商业模式（图文并茂） ===== */
.biz-section{margin-bottom:34px}
.biz-sec-title{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:#0D2B4E;margin-bottom:6px}
.biz-sec-ico{font-size:22px}
.biz-sec-sub{color:#5b6b7a;font-size:14px;margin:0 0 18px}

.biz-chain{display:flex;flex-direction:column;align-items:center}
.biz-step{width:100%;max-width:860px;display:flex;flex-direction:column;align-items:center}
.biz-node{width:100%;display:flex;align-items:center;gap:16px;background:#fff;border:1px solid #E2E9F1;border-left:5px solid #1565C0;border-radius:14px;padding:16px 18px;box-shadow:0 4px 14px rgba(21,101,192,.06);transition:.15s}
.biz-node:hover{border-color:#1565C0;box-shadow:0 8px 22px rgba(21,101,192,.12);transform:translateY(-2px)}
.biz-badge{flex:0 0 64px;display:flex;flex-direction:column;align-items:center;gap:4px}
.biz-num{width:30px;height:30px;border-radius:9px;background:#1565C0;color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center}
.biz-ico{font-size:22px;line-height:1}
.biz-main{flex:1;min-width:0}
.biz-t{font-size:17px;font-weight:800;color:#0D2B4E;margin-bottom:4px}
.biz-d{font-size:13.5px;line-height:1.55;color:#5b6b7a}
.biz-sys{flex:0 0 150px;text-align:right;font-size:12.5px;color:#1565C0;background:#E7F0FA;border-radius:8px;padding:8px 10px;font-weight:600}
.biz-arrow{color:#FF7A00;font-size:22px;font-weight:900;line-height:1;margin:6px 0 6px;animation:none}
.biz-arrow::after{content:""}

.biz-loop-wrap{background:linear-gradient(160deg,#0D2B4E,#103a66);border-radius:16px;padding:18px;overflow-x:auto}
.biz-loop-svg{display:block;width:100%;height:auto;min-width:680px}
.biz-loop-note{text-align:center;color:#5b6b7a;font-size:14px;margin-top:14px;line-height:1.6}
.biz-loop-note b{color:#FF7A00}

.biz-compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.biz-cmp{border-radius:14px;padding:18px 20px}
.biz-cmp ul{margin:10px 0 0;padding-left:20px;display:flex;flex-direction:column;gap:9px}
.biz-cmp li{font-size:14px;line-height:1.5}
.biz-cmp-no{background:#FFF4EC;border:1px solid #f3cda0}
.biz-cmp-no .biz-cmp-h{color:#8a531a}
.biz-cmp-no li{color:#7a5a3a}
.biz-cmp-yes{background:#EAF3FF;border:1px solid #bcd6f5}
.biz-cmp-yes .biz-cmp-h{color:#1565C0}
.biz-cmp-yes li{color:#27496b}
.biz-cmp-h{font-size:16px;font-weight:800;margin-bottom:4px}

.biz-mods{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.biz-mod{background:#fff;border:1px solid #E2E9F1;border-radius:14px;padding:18px;transition:.15s}
.biz-mod:hover{border-color:#1565C0;box-shadow:0 6px 20px rgba(21,101,192,.1);transform:translateY(-2px)}
.biz-mod-ico{font-size:26px;margin-bottom:10px}
.biz-mod-t{font-size:16px;font-weight:800;color:#0D2B4E;margin-bottom:6px}
.biz-mod-d{font-size:13px;line-height:1.5;color:#5b6b7a}

@media(max-width:900px){.biz-mods{grid-template-columns:repeat(2,1fr)}.biz-compare{grid-template-columns:1fr}}
@media(max-width:640px){
  .biz-node{flex-wrap:wrap;gap:10px}
  .biz-sys{flex:1 1 100%;text-align:left}
  .biz-mods{grid-template-columns:1fr}
}

/* ============================================================
   AI 助理（模拟常见 AI 聊天页）
   ============================================================ */
.ai-chat{
  display:flex;flex-direction:column;
  height:calc(100vh - 230px);min-height:460px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);
}
.ai-messages{
  flex:1;overflow-y:auto;padding:22px 20px;
  background:linear-gradient(180deg,#FBFDFF 0%, #F4F7FB 100%);
  display:flex;flex-direction:column;gap:16px;
}
.ai-msg{display:flex;max-width:100%}
.ai-msg--user{justify-content:flex-end}
.ai-msg--bot{justify-content:flex-start}
.ai-bubble{
  max-width:78%;padding:12px 16px;border-radius:14px;line-height:1.65;
  font-size:14px;white-space:normal;word-break:break-word;
}
.ai-msg--user .ai-bubble{
  background:var(--blue);color:#fff;border-bottom-right-radius:4px;
}
.ai-msg--bot .ai-bubble{
  background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;color:var(--ink);
}
.ai-bubble--err{background:var(--red-soft);border-color:#F1C0B9;color:var(--red)}
.ai-bubble--loading{display:inline-flex;align-items:center;gap:6px;color:var(--gray)}
.ai-bubble .dot{
  width:7px;height:7px;border-radius:50%;background:var(--gray-light);
  animation:aiBlink 1.2s infinite ease-in-out;
}
.ai-bubble .dot:nth-child(2){animation-delay:.2s}
.ai-bubble .dot:nth-child(3){animation-delay:.4s}
@keyframes aiBlink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.ai-pre{
  margin:0;white-space:pre-wrap;word-break:break-word;font-family:var(--font-sans);
  font-size:14px;line-height:1.7;
}
.ai-inputbar{
  display:flex;gap:10px;align-items:flex-end;
  padding:14px 16px;border-top:1px solid var(--line);background:#fff;
}
.ai-textarea{
  flex:1;resize:none;padding:11px 14px;border:1px solid var(--line);border-radius:12px;
  font-size:14px;line-height:1.5;font-family:var(--font-sans);color:var(--ink);
  outline:none;transition:.15s;max-height:160px;
}
.ai-textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(21,101,192,.12)}
.ai-send{
  flex:0 0 auto;padding:11px 22px;font-size:15px;font-weight:700;
  border-radius:12px;cursor:pointer;
}
.ai-send:disabled{opacity:.6;cursor:not-allowed}
@media(max-width:640px){
  .ai-chat{height:calc(100vh - 200px)}
  .ai-bubble{max-width:88%}
}

/* ============================================================
   缴费管理：学员扫码缴费页 + 管理员缴费管理
   ============================================================ */
.pay-wrap{max-width:640px}
.pay-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px 24px;text-align:center;
}
.pay-card h2{font-size:22px;color:var(--blue-dark);margin:6px 0 8px}
.pay-sub{color:var(--gray);font-size:14px;margin-bottom:18px}
.pay-info{
  text-align:left;background:#fafcff;border:1px solid var(--line);
  border-radius:10px;padding:6px 14px;margin:0 0 18px;
}
.pay-info-row{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:9px 0;font-size:14px;border-bottom:1px dashed var(--line);
}
.pay-info-row:last-child{border-bottom:none}
.pay-info-row span{color:var(--gray);flex:0 0 auto}
.pay-info-row b{color:var(--ink);font-weight:600}
.pay-amount{color:#C0392B !important;font-size:20px;font-weight:800}

.pay-tabs{display:flex;gap:10px;justify-content:center;margin:0 0 18px}
.pay-tab{
  flex:1;max-width:210px;padding:11px 8px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--gray);font-size:14px;font-weight:600;cursor:pointer;transition:.15s;
  font-family:var(--font-sans);
}
.pay-tab:hover{border-color:var(--blue);color:var(--blue)}
.pay-tab.active{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 4px 12px rgba(21,101,192,.22)}
.pay-tab.is-disabled{opacity:.55;cursor:not-allowed}

.pay-qr-box{
  background:linear-gradient(180deg,#f7fafd,#fff);border:1px dashed #c9d7e6;
  border-radius:12px;padding:22px 18px 16px;margin-bottom:18px;
}
.pay-qr{
  width:210px;height:210px;max-width:70vw;object-fit:contain;display:block;margin:0 auto;
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:6px;
}
.pay-qr--empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  color:var(--gray);font-size:14px;line-height:1.8;
}
.pay-qr--empty span{font-size:12px;color:var(--gray-light)}
.pay-qr-ico{font-size:40px;opacity:.5}
.pay-qr-tip{margin-top:14px;font-size:14px;color:var(--ink)}
.pay-note{
  margin-top:14px;font-size:12.5px;color:var(--gray);text-align:left;
  background:var(--blue-soft);border-radius:8px;padding:9px 12px;line-height:1.7;
}
.pay-card .field{text-align:left;margin:0 0 14px}

/* 待管理员核实 / 缴费成功 */
.pay-card--wait,.pay-card--done{padding:34px 24px 28px}
.pay-big-ico{font-size:52px;line-height:1;margin-bottom:10px}
.pay-card--done .pay-big-ico{filter:drop-shadow(0 4px 10px rgba(30,142,90,.25))}
.pay-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}

/* 管理员：缴费管理 */
.pay-stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}
.pay-stat{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 16px;box-shadow:var(--shadow);
}
.pay-stat b{display:block;font-size:22px;color:var(--blue-dark);line-height:1.3}
.pay-stat span{font-size:12.5px;color:var(--gray)}
.pay-stat--amber b{color:var(--amber)}
.pay-stat--green b{color:var(--green)}
.pay-stat--gray b{color:var(--gray)}
.pay-tip{margin-top:10px;font-size:12.5px;color:var(--gray-light);line-height:1.7}
.pay-ops{white-space:nowrap;display:flex;gap:6px;flex-wrap:wrap}
.pay-amt{width:110px;padding:5px 8px}
.pay-note-input{width:100%;min-width:140px;padding:5px 8px}

/* 班级收费标准横幅（学员缴费页顶部，突出显示本班应收金额） */
.pay-fee{
  background:linear-gradient(135deg,#0D2B4E,#1565C0);color:#fff;border-radius:12px;
  padding:16px 18px;margin:0 0 16px;text-align:left;
}
.pay-fee-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.pay-fee-label{font-size:12.5px;letter-spacing:.5px;opacity:.85}
.pay-fee-top .badge{background:rgba(255,255,255,.18);color:#fff}
.pay-fee-cls{font-size:16px;font-weight:700;line-height:1.4}
.pay-fee-amt{font-size:32px;font-weight:800;line-height:1.25;margin:2px 0 4px;color:#FFD08A}
.pay-fee-sub{font-size:12.5px;opacity:.82}

/* 统一收费账户二维码：上传按钮在面板头部，面板内只保留一行紧凑状态 */
.pay-qr-status{
  display:flex;align-items:center;gap:26px;flex-wrap:wrap;
  padding:10px 18px;font-size:13px;
}
.qr-item{display:inline-flex;align-items:center;gap:7px}
.qr-item b{color:var(--ink);font-weight:600}
.qr-mini{
  width:26px;height:26px;object-fit:contain;border:1px solid var(--line);
  border-radius:4px;background:#fff;cursor:zoom-in;
}
.qr-ok{color:var(--green);font-weight:600}
.qr-no{color:var(--gray-light)}
.qr-file{font-size:12px;color:var(--gray-light)}
.btn-link{
  background:none;border:none;padding:0;color:var(--blue);font-size:12.5px;
  font-family:var(--font-sans);cursor:pointer;text-decoration:underline;
}
.btn-link:hover{color:var(--red)}
/* 学员缴费页：二维码上方的「统一收费账户」标识 */
.pay-qr-badge{
  display:inline-block;margin-bottom:12px;padding:3px 12px;border-radius:20px;
  background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:600;
}
.pay-fee-sep{opacity:.55;margin:0 2px}

/* 班级管理：培训费用列 */
.cls-fee{font-size:14px}
.cls-fee--set{color:#C0392B;font-weight:700}
.cls-fee--default{color:var(--gray)}
.cls-fee--default i{
  display:inline-block;margin-left:6px;padding:0 6px;border-radius:10px;
  background:#eef2f7;color:var(--gray);font-size:11px;font-style:normal;font-weight:600;
}
.cls-fee-note{margin-top:2px;font-size:11.5px;color:var(--gray-light)}
.cls-fee-tip{
  margin-bottom:12px;padding:9px 12px;border-radius:8px;line-height:1.7;
  background:var(--blue-soft);color:var(--gray);font-size:12.5px;
}
.cls-fee-tip b{color:var(--blue-dark)}
/* 班级管理：人数上限列 */
.cls-cap-num{font-size:14px;font-weight:700;color:var(--text)}
.cls-cap-sub{margin-top:2px;font-size:11.5px;color:var(--gray)}
.cls-cap-sub b{color:var(--text)}
.cls-cap-full{color:#C0392B;font-weight:600}
@media(max-width:640px){
  .pay-stat-row{grid-template-columns:repeat(2,1fr)}
  .pay-card{padding:20px 16px}
  .pay-qr{width:180px;height:180px}
  .pay-qr-status{gap:8px}
  .qr-item{width:100%}
}

/* ============================================================
   通用表格分页（各管理表格每页 10 条）
   ============================================================ */
.pager-box{padding:0 18px 4px}
.pager{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:12px 0 6px;border-top:1px solid var(--line);margin-top:14px;
}
.pager-info{font-size:12.5px;color:var(--gray)}
.pager-info b{color:var(--ink)}
.pager-ctrl{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.pager-btn{
  min-width:34px;height:32px;padding:0 10px;border:1px solid var(--line);border-radius:8px;
  background:#fff;color:var(--ink);font-size:13px;font-family:var(--font-sans);
  cursor:pointer;transition:.15s;
}
.pager-btn:hover:not(:disabled){border-color:var(--blue);color:var(--blue)}
.pager-btn.is-active{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}
.pager-btn:disabled{opacity:.45;cursor:not-allowed}
.pager-gap{color:var(--gray-light);padding:0 2px}
@media(max-width:640px){
  .pager{justify-content:center}
  .pager-info{width:100%;text-align:center}
  .pager-ctrl{justify-content:center}
}

/* ===== 账号设置（个人资料 + 修改密码） ===== */
.set-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px 28px;align-items:start;margin-top:10px}
.set-section{padding:16px 0;border-top:1px dashed var(--line);margin-top:6px}
.set-grid .set-section{border-top:none;margin-top:0;padding-top:0}
.set-sec-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:12px}
.ro-grid{display:flex;flex-direction:column;gap:8px;margin-bottom:10px}
.ro-item{display:flex;align-items:center;gap:10px;padding:8px 12px;background:#F5F8FC;border:1px solid var(--line);border-radius:8px}
.ro-lab{flex:0 0 84px;color:var(--gray);font-size:13px}
.ro-val{color:var(--ink);font-weight:600;word-break:break-all}
@media(max-width:640px){
  .set-grid{grid-template-columns:1fr;gap:0}
  .set-grid .set-section{border-top:1px dashed var(--line);margin-top:6px;padding-top:16px}
}

/* ===== 招生管理（招生推荐码 / 收入分成 / 提取确认） ===== */
.enroll-code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:1px}
.enroll-pend{font-weight:700}