/* ============ 汽车底盘虚拟仿真实训系统 · Aurora UI ============
   视觉基调：深空侧栏 + 柔光玻璃卡片 + 极光渐变强调
   圆润体系：卡片 18px / 控件 12px / 弹窗 22px
   ============================================================ */
:root{
  --bg:#eef2fa; --bg2:#e4eaf6; --card:#fff; --card-g:linear-gradient(160deg,#ffffff 0%,#f7f9fd 100%);
  --line:rgba(18,36,72,.08); --line2:rgba(18,36,72,.05); --line3:rgba(18,36,72,.12);
  --txt:#0d182c; --sub:#5a6b86; --sub2:#8b9bb4;
  --pri:#3b6cff; --pri-d:#2748d6; --pri-l:#e9f0ff; --pri-g:linear-gradient(135deg,#3b6cff 0%,#5b8cff 55%,#22d3ee 130%);
  --pri-soft:linear-gradient(160deg,rgba(59,108,255,.14),rgba(34,211,238,.08));
  --fn-bg:#3b6cff; --fn-bg-hover:#2a55e8; --fn-bg-active:#1e42c4; --fn-ring:rgba(59,108,255,.3);
  --ok:#0faf66; --ok-l:#e5f8ef; --warn:#d97706; --warn-l:#fff5e4;
  --danger:#e5484d; --danger-l:#fdeced; --purple:#7c5cff; --purple-l:#f1edff;
  --side:#0a1328; --side2:#070e1c; --side-txt:#93a4c2; --side-on:#fff;
  --side-glass:rgba(255,255,255,.055); --side-line:rgba(255,255,255,.08);
  --radius:18px; --radius-sm:12px; --radius-lg:24px; --radius-xs:10px;
  --shadow:0 1px 2px rgba(15,30,60,.04), 0 8px 24px rgba(15,30,60,.06);
  --shadow-lg:0 10px 24px rgba(15,30,60,.08), 0 28px 56px rgba(15,30,60,.12);
  --shadow-glow:0 10px 28px rgba(59,108,255,.3);
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--txt);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:14px;color:var(--txt)}
a{color:var(--pri)}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:#c5d0e2;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:#a8b6cc}
::-webkit-scrollbar-track{background:transparent}

/* ============ 登录页 ============ */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;position:relative;overflow:hidden;
  background:
    radial-gradient(1000px 640px at 88% -12%,rgba(59,108,255,.45) 0%,transparent 58%),
    radial-gradient(900px 520px at -8% 110%,rgba(34,211,238,.28) 0%,transparent 55%),
    radial-gradient(700px 480px at 50% 50%,rgba(124,92,255,.18) 0%,transparent 60%),
    linear-gradient(160deg,#070d1c 0%,#0c1830 45%,#081222 100%)}
.login-wrap.has-bg{background:#070d1c}
.login-bgimg{position:absolute;inset:0;z-index:0;width:100%;height:100%;object-fit:cover;pointer-events:none}
.login-deco{position:absolute;border-radius:50%;filter:blur(2px);opacity:.55;pointer-events:none;animation:aurora 12s ease-in-out infinite alternate}
.login-deco:nth-child(2){animation-delay:-4s}
@keyframes aurora{
  0%{transform:translate3d(0,0,0) scale(1)}
  100%{transform:translate3d(18px,22px,0) scale(1.08)}
}
.login-wrap::after{content:"";position:absolute;inset:0;background-image:
  linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:48px 48px;pointer-events:none;
  mask-image:radial-gradient(ellipse at center,#000 20%,transparent 75%)}
.login-wrap.has-bg::after{display:none}
.login-card{position:relative;z-index:2;width:100%;max-width:540px;
  background:rgba(255,255,255,.14);backdrop-filter:blur(28px) saturate(1.4);-webkit-backdrop-filter:blur(28px) saturate(1.4);
  border:1px solid rgba(255,255,255,.24);border-radius:var(--radius-lg);padding:28px 34px 22px;
  box-shadow:0 30px 80px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.22);color:#fff}
.login-head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.login-logo{flex:none;width:50px;height:50px;border-radius:16px;background:var(--pri-g);display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 28px rgba(59,108,255,.45), inset 0 1px 0 rgba(255,255,255,.25)}
.login-logo svg{width:26px;height:26px;fill:#fff}
.login-headtxt{flex:1;min-width:0}
.login-card h1{font-size:19px;text-align:left;margin-bottom:3px;letter-spacing:.6px;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.35);font-weight:800}
.login-card .sub{text-align:left;color:rgba(255,255,255,.82);font-size:12.5px;text-shadow:0 1px 6px rgba(0,0,0,.3);letter-spacing:.3px}
.login-card .role-tabs{display:flex;gap:6px;margin-bottom:16px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:5px}
.login-card .role-tab{color:rgba(255,255,255,.82);padding:9px 10px;border-radius:11px;font-weight:600;letter-spacing:.5px}
.login-card .role-tab.on{background:rgba(255,255,255,.95);color:var(--pri-d);font-weight:800;box-shadow:0 4px 14px rgba(0,0,0,.2)}
.login-card .field{margin-bottom:12px}
.login-card .field label{color:rgba(255,255,255,.88);margin-bottom:6px;text-shadow:0 1px 4px rgba(0,0,0,.25);font-weight:600}
.login-card .field input{background:rgba(255,255,255,.94);border-color:rgba(255,255,255,.5);color:var(--txt);padding:11px 14px;border-radius:13px;box-shadow:inset 0 1px 2px rgba(15,30,60,.06)}
.login-card .field input:focus{border-color:rgba(59,108,255,.7);box-shadow:0 0 0 3px rgba(59,108,255,.22)}
.login-card .btn-lg{margin-top:6px;padding:13px 18px;border-radius:14px;box-shadow:0 8px 24px rgba(59,108,255,.4)}
.login-foot{margin-top:14px;text-align:center;font-size:12px;color:rgba(255,255,255,.75);text-shadow:0 1px 4px rgba(0,0,0,.25)}
.login-foot a{cursor:pointer}
.pwd-tip{font-size:12px;color:var(--warn);margin-top:6px}
.login-card .pwd-tip{color:#ffd9a8}

@media(max-width:560px){
  .login-card{max-width:100%;padding:22px 18px 16px;border-radius:20px}
  .login-head{gap:10px;margin-bottom:14px}
  .login-logo{width:44px;height:44px;border-radius:13px}
  .login-card h1{font-size:16px}
}

/* ============ 全局表单/角色页签 ============ */
.role-tabs{display:flex;gap:6px;margin-bottom:18px;background:#eef2f9;border-radius:14px;padding:5px}
.role-tab{flex:1;padding:9px;border-radius:11px;border:none;background:transparent;text-align:center;font-size:13px;color:var(--sub);cursor:pointer;transition:.18s;display:flex;align-items:center;justify-content:center;gap:6px;font-weight:600}
.role-tab.on{background:#fff;color:var(--pri);font-weight:800;box-shadow:0 2px 10px rgba(15,30,60,.1)}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--sub);margin-bottom:6px;font-weight:600}
.field input,.field select,.field textarea{width:100%;padding:10px 13px;border:1px solid var(--line3);border-radius:13px;outline:none;background:#fff;transition:.18s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(59,108,255,.14)}
.field textarea{resize:vertical}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 16px;border-radius:13px;border:1px solid transparent;font-size:13.5px;font-weight:600;transition:.18s;text-decoration:none;white-space:nowrap;line-height:1.4}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-pri{background:var(--pri-g);color:#fff;box-shadow:0 4px 14px rgba(59,108,255,.28)}
.btn-pri:hover:not(:disabled){filter:brightness(1.06);box-shadow:var(--shadow-glow);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line3);color:var(--txt)}
.btn-ghost:hover{border-color:#b7c7e4;background:#f7faff}
.btn-soft{background:var(--pri-l);color:var(--pri-d);border:none}
.btn-soft:hover{background:#dce7ff}
.btn-danger{background:#fff;border-color:#f3c3c6;color:var(--danger)}
.btn-danger:hover{background:var(--danger-l)}
.btn-ok{background:var(--ok-l);color:var(--ok);border:none}
.btn-warn{background:var(--warn-l);color:var(--warn);border:none}
.btn-sm{padding:5px 11px;font-size:12px;border-radius:10px;font-weight:600}
.btn-lg{padding:12px 22px;font-size:15px;border-radius:14px}
.btn-block{width:100%}

/* ============ 主布局 ============ */
.app{min-height:100vh;display:flex}
aside.side{width:228px;background:linear-gradient(180deg,var(--side) 0%,var(--side2) 100%);display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:30;
  box-shadow:4px 0 24px rgba(7,14,28,.25)}
.side-brand{display:flex;align-items:center;gap:10px;padding:12px 18px 10px;border-bottom:1px solid var(--side-line)}
.side-brand .logo{width:38px;height:38px;border-radius:13px;background:var(--pri-g);display:flex;align-items:center;justify-content:center;flex:none;
  box-shadow:0 6px 16px rgba(59,108,255,.4), inset 0 1px 0 rgba(255,255,255,.22)}
.side-brand .logo svg{width:20px;height:20px;fill:#fff}
.side-brand .t{color:#fff;font-weight:800;font-size:14px;line-height:1.3;letter-spacing:.2px}
.side-brand .t small{display:block;color:var(--side-txt);font-weight:400;font-size:10.5px;letter-spacing:.6px}
.side-role{margin:8px 14px 2px;padding:7px 12px;border-radius:13px;background:var(--side-glass);border:1px solid var(--side-line);display:flex;align-items:center;gap:8px;backdrop-filter:blur(8px)}
.side-role .dot{width:8px;height:8px;border-radius:50%;flex:none}
.side-role span{color:var(--side-txt);font-size:12px}
.side-role b{color:#fff;font-size:12.5px;font-weight:700;margin-left:auto}
nav{flex:1;overflow-y:auto;padding:6px 12px 8px}
nav .nav-card{background:var(--side-glass);border:1px solid var(--side-line);border-radius:16px;padding:3px 6px 4px;margin-bottom:7px;backdrop-filter:blur(10px)}
nav .nav-card.nav-tone1{background:rgba(96,165,250,.14);border-color:rgba(96,165,250,.22)}
nav .nav-card.nav-tone2{background:rgba(45,212,191,.12);border-color:rgba(45,212,191,.2)}
nav .nav-card.nav-tone3{background:rgba(167,139,250,.14);border-color:rgba(167,139,250,.22)}
nav .nav-card.nav-tone4{background:rgba(251,146,60,.12);border-color:rgba(251,146,60,.2)}
nav .nav-card.nav-tone1 .nav-card-title{color:#8fb4f0}
nav .nav-card.nav-tone2 .nav-card-title{color:#7fd8c9}
nav .nav-card.nav-tone3 .nav-card-title{color:#b6a4f2}
nav .nav-card.nav-tone4 .nav-card-title{color:#f2b483}
nav .nav-card-title{color:#7b88a3;font-size:10.5px;font-weight:700;letter-spacing:1.2px;padding:5px 10px 3px;text-transform:uppercase}
nav .nav-group{color:#5d6a83;font-size:10.5px;font-weight:700;letter-spacing:1.5px;padding:14px 10px 6px;text-transform:uppercase}
nav .item{padding:7px 12px;margin:1px 0;border-radius:12px;cursor:pointer;color:var(--side-txt);font-size:13.5px;display:flex;align-items:center;gap:10px;transition:.18s;position:relative}
nav .item:hover{background:rgba(255,255,255,.07);color:#e8eef8;transform:translateX(2px)}
nav .item.on{background:var(--pri-g);color:var(--side-on);font-weight:700;box-shadow:0 6px 18px rgba(59,108,255,.4), inset 0 1px 0 rgba(255,255,255,.18)}
nav .item .ico{width:18px;text-align:center;flex:none;font-size:14px}
nav .item .badge{margin-left:auto;background:var(--danger);color:#fff;font-size:10.5px;padding:0 7px;border-radius:9px;font-weight:700;min-width:18px;text-align:center;line-height:17px}
nav .item.on .badge{background:rgba(255,255,255,.25)}
.side-foot{padding:9px 16px;border-top:1px solid var(--side-line);color:#5d6a83;font-size:11px}

.main-col{flex:1;margin-left:228px;display:flex;flex-direction:column;min-height:100vh}
header.top{background:rgba(255,255,255,.82);backdrop-filter:blur(14px) saturate(1.2);-webkit-backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--line);padding:10px 24px;display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:16px;position:sticky;top:0;z-index:20}
header.top .crumb{min-width:0;display:flex;flex-direction:column;gap:2px}
header.top .crumb-title{font-size:16.5px;font-weight:800;line-height:1.35;letter-spacing:.2px}
header.top .crumb-desc{font-weight:400;color:var(--sub);font-size:12px;line-height:1.5}
header.top .right{display:flex;align-items:center;gap:10px;flex:none}
header.top .greet{font-size:12.5px;color:var(--sub);white-space:nowrap}
.icon-btn{width:36px;height:36px;border-radius:12px;border:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;position:relative;color:var(--sub);transition:.18s}
.icon-btn:hover{border-color:#b7c7e4;color:var(--txt);box-shadow:var(--shadow)}
.icon-btn .dot{position:absolute;top:-3px;right:-3px;width:9px;height:9px;border-radius:50%;background:var(--danger);border:2px solid #fff}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--pri-g);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;cursor:pointer;box-shadow:0 4px 12px rgba(59,108,255,.3)}
.user-chip{display:flex;align-items:center;gap:8px;cursor:pointer;padding:4px 10px 4px 4px;border-radius:22px;transition:.18s}
.user-chip:hover{background:rgba(59,108,255,.08)}
.user-chip .nm{font-size:13px;font-weight:700;line-height:1.2}
.user-chip .rl{font-size:11px;color:var(--sub)}
main{flex:1;padding:24px 28px 44px;overflow:auto;
  background:
    radial-gradient(900px 420px at 100% 0%,rgba(59,108,255,.055) 0%,transparent 55%),
    radial-gradient(700px 360px at 0% 100%,rgba(34,211,238,.045) 0%,transparent 50%),
    var(--bg)}
.page-acts{display:flex;align-items:center;justify-content:flex-start;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.page-acts:empty{display:none}

/* ============ 页面顶部功能按键 ============ */
/* 顶部功能键：统一尺寸基座，颜色由变体决定（默认主色） */
.page-acts .btn,
.fn-bar .btn,
.fn-group .btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:38px;padding:0 16px;
  border:1px solid transparent;border-radius:12px;
  background:var(--fn-bg);color:#fff;
  font-size:13.5px;font-weight:600;letter-spacing:.2px;line-height:1;
  -webkit-font-smoothing:antialiased;
  box-shadow:0 2px 6px rgba(59,108,255,.18), inset 0 1px 0 rgba(255,255,255,.16);
  transition:background-color .18s cubic-bezier(.4,0,.2,1),
             box-shadow .2s cubic-bezier(.4,0,.2,1),
             transform .15s cubic-bezier(.4,0,.2,1),
             border-color .18s, color .18s;
  white-space:nowrap;text-decoration:none;cursor:pointer;
}
.page-acts .btn:hover:not(:disabled),
.fn-bar .btn:hover:not(:disabled),
.fn-group .btn:hover:not(:disabled){
  background:var(--fn-bg-hover);
  transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(59,108,255,.3), inset 0 1px 0 rgba(255,255,255,.2);
}
.page-acts .btn:active:not(:disabled),
.fn-bar .btn:active:not(:disabled),
.fn-group .btn:active:not(:disabled){
  background:var(--fn-bg-active);
  transform:translateY(0) scale(.985);
  box-shadow:inset 0 2px 5px rgba(9,26,74,.22);
}
.page-acts .btn:focus-visible,
.fn-bar .btn:focus-visible,
.fn-group .btn:focus-visible{
  outline:none;box-shadow:0 0 0 3px var(--fn-ring), inset 0 1px 0 rgba(255,255,255,.14);
}
.page-acts .btn:disabled,
.fn-bar .btn:disabled,
.fn-group .btn:disabled{
  opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;background:var(--fn-bg);
}

/* 工具条按钮变体：次级描边 / AI 紫强调 / 主色实心，覆盖默认主色 */
.page-acts .btn.btn-ghost,
.fn-bar .btn.btn-ghost,
.fn-group .btn.btn-ghost{
  background:#fff;border-color:var(--line3);color:var(--txt);box-shadow:0 1px 2px rgba(15,30,60,.04);
}
.page-acts .btn.btn-ghost:hover:not(:disabled),
.fn-bar .btn.btn-ghost:hover:not(:disabled),
.fn-group .btn.btn-ghost:hover:not(:disabled){
  background:#f7faff;border-color:#b7c7e4;color:var(--pri-d);
  box-shadow:0 6px 14px rgba(15,30,60,.08);transform:translateY(-1px);
}
.page-acts .btn.btn-ghost:active:not(:disabled),
.fn-bar .btn.btn-ghost:active:not(:disabled),
.fn-group .btn.btn-ghost:active:not(:disabled){
  background:#eef2f9;transform:translateY(0) scale(.985);box-shadow:inset 0 1px 3px rgba(15,30,60,.08);
}
.page-acts .btn.btn-ghost:focus-visible,
.fn-bar .btn.btn-ghost:focus-visible,
.fn-group .btn.btn-ghost:focus-visible{
  box-shadow:0 0 0 3px rgba(59,108,255,.14);
}

.page-acts .btn.btn-ai,
.fn-bar .btn.btn-ai,
.fn-group .btn.btn-ai{
  background:linear-gradient(135deg,#7c5cff 0%,#9b7bff 55%,#6d8dff 130%);
  box-shadow:0 2px 8px rgba(124,92,255,.28), inset 0 1px 0 rgba(255,255,255,.18);
}
.page-acts .btn.btn-ai:hover:not(:disabled),
.fn-bar .btn.btn-ai:hover:not(:disabled),
.fn-group .btn.btn-ai:hover:not(:disabled){
  background:linear-gradient(135deg,#6d4ff0 0%,#8b6bf0 55%,#5d7df0 130%);
  box-shadow:0 8px 22px rgba(124,92,255,.36), inset 0 1px 0 rgba(255,255,255,.2);
}
.page-acts .btn.btn-ai:active:not(:disabled),
.fn-bar .btn.btn-ai:active:not(:disabled),
.fn-group .btn.btn-ai:active:not(:disabled){
  background:#5a3fd4;box-shadow:inset 0 2px 5px rgba(40,20,90,.28);
}
.page-acts .btn.btn-ai:focus-visible,
.fn-bar .btn.btn-ai:focus-visible,
.fn-group .btn.btn-ai:focus-visible{
  box-shadow:0 0 0 3px rgba(124,92,255,.3), inset 0 1px 0 rgba(255,255,255,.18);
}

.page-acts .btn.btn-pri-solid,
.fn-bar .btn.btn-pri-solid,
.fn-group .btn.btn-pri-solid{
  background:var(--pri-g);
  box-shadow:0 4px 14px rgba(59,108,255,.3), inset 0 1px 0 rgba(255,255,255,.18);
}
.page-acts .btn.btn-soft,
.fn-bar .btn.btn-soft,
.fn-group .btn.btn-soft{
  background:var(--pri-l);color:var(--pri-d);box-shadow:none;border-color:transparent;
}
.page-acts .btn.btn-soft:hover:not(:disabled),
.fn-bar .btn.btn-soft:hover:not(:disabled),
.fn-group .btn.btn-soft:hover:not(:disabled){
  background:#dce7ff;color:var(--pri-d);box-shadow:0 4px 12px rgba(59,108,255,.12);transform:translateY(-1px);
}
.page-acts .btn.btn-soft:active:not(:disabled),
.fn-bar .btn.btn-soft:active:not(:disabled),
.fn-group .btn.btn-soft:active:not(:disabled){
  background:#c9daff;transform:translateY(0) scale(.985);box-shadow:inset 0 1px 3px rgba(59,108,255,.12);
}

.fn-bar{display:flex;align-items:center;flex-wrap:wrap;gap:12px}

.fn-panel{
  display:flex;flex-direction:column;gap:12px;
  padding:14px 16px;margin-bottom:16px;
  background:var(--card-g);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
}
/* 多分组工具条：宽屏四列、中屏两列、窄屏单列 */
.fn-groups{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;
}
@media (max-width:1100px){ .fn-groups{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (max-width:640px){ .fn-groups{grid-template-columns:1fr} }

.fn-group{
  display:flex;align-items:center;align-content:flex-start;flex-wrap:wrap;gap:8px;
  padding:12px 14px;border-radius:14px;
  background:var(--pri-soft);border:1px solid rgba(59,108,255,.14);
  min-height:72px;
}
.fn-group-ai{
  background:linear-gradient(160deg,rgba(124,92,255,.12),rgba(155,123,255,.06));
  border-color:rgba(124,92,255,.2);
}
.fn-group-title{
  display:inline-flex;align-items:center;align-self:flex-start;
  padding:0 4px 0 10px;border-left:3px solid var(--pri);
  color:var(--pri);font-size:11.5px;font-weight:800;letter-spacing:1px;white-space:nowrap;
  margin-right:2px;flex:0 0 100%;
}
.fn-group-ai .fn-group-title{border-left-color:var(--purple);color:var(--purple)}
/* AI 题库管理工具条：多分组网格布局 */
.qb-actions .fn-groups{width:100%}
@media (max-width:820px){
  .page-acts,.fn-bar,.fn-group{gap:8px}
  .page-acts .btn,.fn-bar .btn,.fn-group .btn{padding:0 12px;font-size:12.5px;height:36px}
}

/* ============ 卡片/统计 ============ */
.card{background:var(--card-g);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:16px;box-shadow:var(--shadow);transition:box-shadow .2s}
.card:hover{box-shadow:var(--shadow-lg)}
.card h2{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px;font-weight:800}
.card h2::before{content:"";width:4px;height:15px;border-radius:3px;background:var(--pri-g)}
.card h2 .sub{font-weight:400;font-size:12px;color:var(--sub);margin-left:6px}
.card h2 .right{margin-left:auto;display:flex;gap:8px;align-items:center}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:16px}
.stat{background:var(--card-g);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow);display:flex;align-items:center;gap:14px;position:relative;overflow:hidden;transition:transform .2s cubic-bezier(.2,.8,.2,1), box-shadow .2s}
.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.stat .ic{width:48px;height:48px;border-radius:15px;display:flex;align-items:center;justify-content:center;font-size:22px;flex:none}
.stat .v{font-size:26px;font-weight:800;line-height:1.15;letter-spacing:.3px}
.stat .k{font-size:12px;color:var(--sub);margin-top:3px;font-weight:600}
.stat .trend{position:absolute;right:14px;top:12px;font-size:11px;color:var(--ok);font-weight:700}
.ic-blue{background:var(--pri-l);color:var(--pri)} .ic-green{background:var(--ok-l);color:var(--ok)}
.ic-orange{background:var(--warn-l);color:var(--warn)} .ic-purple{background:var(--purple-l);color:var(--purple)}
.ic-red{background:var(--danger-l);color:var(--danger)}

.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin-bottom:13px}
.row .field{margin-bottom:0;flex:1;min-width:120px}
.row-center{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}

/* ============ 表格 ============ */
.tbl-wrap{overflow-x:auto}
table{width:100%;border-collapse:separate;border-spacing:0;font-size:13px}
th,td{padding:12px 14px;border-bottom:1px solid var(--line2);text-align:left;vertical-align:middle}
th{color:var(--sub);font-weight:700;background:linear-gradient(180deg,#f7f9fd,#f2f5fb);font-size:12px;white-space:nowrap;border-bottom:1px solid var(--line)}
tbody tr{transition:background .15s}
tr:hover td{background:rgba(59,108,255,.045)}
tbody tr:last-child td{border-bottom:none}
td .acts{display:flex;gap:6px;flex-wrap:wrap}
.empty{text-align:center;color:var(--sub2);padding:34px 0;font-size:13px}
.empty .big{font-size:34px;display:block;margin-bottom:8px;opacity:.5}

/* ============ 标签/徽章 ============ */
.tag{font-size:11.5px;padding:3px 10px;border-radius:999px;font-weight:700;white-space:nowrap;display:inline-block}
.tag-on{background:var(--ok-l);color:var(--ok)} .tag-off{background:#eef1f6;color:var(--sub)}
.tag-blue{background:var(--pri-l);color:var(--pri-d)} .tag-warn{background:var(--warn-l);color:var(--warn)}
.tag-red{background:var(--danger-l);color:var(--danger)} .tag-purple{background:var(--purple-l);color:var(--purple)}
.tag-gray{background:#f1f3f7;color:var(--sub)}
.tag-green{background:var(--ok-l);color:var(--ok)} .tag-orange{background:var(--warn-l);color:var(--warn)}

/* ============ 进度条 ============ */
.pbar{height:8px;border-radius:8px;background:#edf0f6;overflow:hidden;min-width:80px}
.pbar>i{display:block;height:100%;border-radius:8px;background:var(--pri-g);transition:width .4s}
.pbar.green>i{background:linear-gradient(90deg,#0faf66,#3ddc84)}
.pbar.orange>i{background:linear-gradient(90deg,#d97706,#ffc357)}
.pbar-sm{height:5px}

/* ============ 板块/课程卡片 ============ */
.sect-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.sect-card{border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:var(--card-g);transition:.2s;position:relative}
.sect-card:hover{box-shadow:var(--shadow-lg);border-color:#c9d8f5;transform:translateY(-2px)}
.sect-card h3{font-size:14.5px;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.sect-card p{font-size:12px;color:var(--sub);margin-bottom:12px;min-height:36px;line-height:1.55}
.sect-card .meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

/* ============ 虚拟仿真板块卡片 ============ */
.sec-list{display:flex;flex-direction:column;gap:14px}
/* 所有板块卡片统一高度（内容不足时按钮区靠 margin-top:auto 贴底；
   封面用 object-fit:cover 自动裁切填满这个高度，不再被图片比例拉高拉矮） */
.sec-list{--sec-h:220px}
.sec-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--card-g,#fff);box-shadow:var(--shadow);
  display:flex;gap:0;overflow:hidden;transition:.2s;position:relative;height:var(--sec-h);min-height:var(--sec-h)}
.sec-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.sec-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--tone,#3b6cff);border-radius:0 4px 4px 0}
/* 封面：宽度为原先 1.5 倍，高度不再写死 —— 靠 align-self:stretch 撑满卡片上下高度 */
.sec-cover{width:390px;min-width:390px;height:auto;align-self:stretch;position:relative;flex:none;margin-left:4px;
  background:var(--tone-bg,#eef4ff);display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:pointer}
.sec-cover img{width:100%;height:100%;object-fit:cover;object-position:center;display:block}
.sec-cover .ph{color:var(--tone,#7aa2f0);opacity:.75;text-align:center}
.sec-cover .ph svg{width:74px;height:74px;fill:currentColor}
.sec-cover .ph div{font-size:11px;margin-top:2px;color:var(--sub2)}
.sec-cover .mask{position:absolute;inset:0;background:rgba(10,19,40,.55);opacity:0;transition:.2s;
  display:flex;align-items:center;justify-content:center;backdrop-filter:blur(2px)}
.sec-cover:hover .mask{opacity:1}
.sec-cover .mask .btn{background:#fff;color:#0d182c;border:none;font-size:12px;padding:8px 14px;border-radius:12px}
.sec-body{flex:1;min-width:0;padding:15px 20px 14px;display:flex;flex-direction:column}
.sec-title{display:flex;align-items:center;gap:9px;margin-bottom:6px;flex-wrap:wrap}
.sec-title .no{width:28px;height:28px;border-radius:9px;background:var(--tone,#3b6cff);color:#fff;
  font-size:13px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;flex:none;box-shadow:0 4px 10px rgba(59,108,255,.25)}
.sec-title h3{font-size:16px;font-weight:800;letter-spacing:.2px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sec-title .spacer{flex:1}
.sec-intro{font-size:12.5px;color:var(--sub);line-height:1.7;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sec-meta{display:flex;align-items:center;gap:10px;font-size:11.5px;color:var(--sub2);margin-bottom:12px;flex-wrap:wrap}
.sec-meta .dot{width:3px;height:3px;border-radius:50%;background:#cfd6e4}
.sec-stats{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:11px}
.sec-stats .ss-item{font-size:12px;color:var(--sub);background:rgba(255,255,255,.75);border:1px solid var(--line);
  border-radius:11px;padding:5px 12px}
.sec-stats .ss-item b{color:var(--tone,#3b6cff);font-size:14px;font-weight:800;margin-right:2px}
.sec-acts{margin-top:auto;display:flex;gap:8px;flex-wrap:wrap;align-items:center}

.tone-demo{--tone:#8b7cf0;--tone-bg:#f4f2ff;--card-g:linear-gradient(120deg,#faf9ff 0%,#f3f0ff 100%)}
.tone-1{--tone:#5b8def;--tone-bg:#eff4ff;--card-g:linear-gradient(120deg,#f7faff 0%,#eaf1ff 100%)}
.tone-2{--tone:#3fa3b8;--tone-bg:#eef9fb;--card-g:linear-gradient(120deg,#f4fbfd 0%,#e6f6fa 100%)}
.tone-3{--tone:#e08a4c;--tone-bg:#fdf4ec;--card-g:linear-gradient(120deg,#fffaf5 0%,#fdefe2 100%)}
.tone-4{--tone:#4fa876;--tone-bg:#eef8f2;--card-g:linear-gradient(120deg,#f5fcf8 0%,#e8f6ee 100%)}
.tone-x{--tone:#8a94a8;--tone-bg:#f2f4f8;--card-g:linear-gradient(120deg,#fafbfc 0%,#eef1f6 100%)}

/* ============ 模块卡片 ============ */
.mod-list{display:flex;flex-direction:column;gap:12px}
.mcard{border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;box-shadow:var(--shadow);
  display:flex;overflow:hidden;transition:.2s}
.mcard:hover{box-shadow:var(--shadow-lg);border-color:#c9d8f5;transform:translateY(-1px)}
/* 模块封面：宽度 1.5 倍，高度同样撑满卡片 */
.mcard .cv{width:198px;min-width:198px;height:auto;align-self:stretch;position:relative;flex:none;
  background:var(--tone-bg,#eef4ff);display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:pointer}
.mcard .cv img{width:100%;height:100%;object-fit:cover;display:block}
.mcard .cv .ph{color:var(--tone,#7aa2f0);opacity:.7;text-align:center}
.mcard .cv .ph svg{width:46px;height:46px;fill:currentColor}
.mcard .cv .mask{position:absolute;inset:0;background:rgba(10,19,40,.55);opacity:0;transition:.2s;
  display:flex;align-items:center;justify-content:center}
.mcard .cv:hover .mask{opacity:1}
.mcard .cv .mask span{background:#fff;color:#0d182c;border-radius:10px;font-size:11.5px;padding:5px 10px;font-weight:700}
.mcard .bd{flex:1;min-width:0;padding:11px 14px;display:flex;flex-direction:column}
.mcard .tt{display:flex;align-items:center;gap:8px;margin-bottom:4px;flex-wrap:wrap}
.mcard .tt h4{font-size:14px;font-weight:700}
.mcard .tt .spacer{flex:1}
.mcard .ds{font-size:12px;color:var(--sub);line-height:1.6;margin-bottom:7px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:19px}
.mcard .chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:9px}
.mcard .chip{font-size:11px;padding:2px 8px;border-radius:999px;background:#f4f6fa;color:var(--sub);border:1px solid var(--line2)}
.mcard .chip.ok{background:var(--ok-l);color:var(--ok);border-color:#cdeadd}
.mcard .chip.no{background:var(--warn-l);color:var(--warn);border-color:#f3e0c2}
.mcard .ft{margin-top:auto;display:flex;gap:7px;flex-wrap:wrap;align-items:center}

.sorting .sec-card,.sorting .mcard{cursor:grab}
.sorting .sec-card:active,.sorting .mcard:active{cursor:grabbing}
.sort-handle{width:26px;height:26px;border-radius:9px;border:1px solid var(--line);background:#fff;
  color:var(--sub);font-size:13px;display:inline-flex;align-items:center;justify-content:center;flex:none}
.sort-handle:hover{border-color:var(--pri);color:var(--pri)}
.drag-over{outline:2px dashed var(--pri);outline-offset:2px}
.sec-ord{position:absolute;top:8px;left:12px;z-index:2;background:rgba(255,255,255,.92);
  border-radius:12px;padding:1px 9px;font-size:11.5px;font-weight:800;color:var(--tone,#3b6cff);
  box-shadow:0 2px 8px rgba(15,30,60,.12)}

@media(max-width:820px){
  .sec-card{flex-direction:column}
  .sec-cover{width:100%;min-width:0;height:130px;margin-left:0}
  .sec-card::before{width:100%;height:4px;bottom:auto;border-radius:0}
  .mcard{flex-direction:column}
  .mcard .cv{width:100%;min-width:0;height:110px}
}
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.course-card{border:1px solid var(--line);border-radius:var(--radius);padding:0;background:#fff;cursor:pointer;transition:.2s;overflow:hidden;box-shadow:var(--shadow)}
.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:#c9d8f5}
.course-card .top{padding:16px 18px 12px;background:linear-gradient(135deg,#f0f5ff,#fbfcff);border-bottom:1px solid var(--line2)}
.course-card h3{font-size:15.5px;font-weight:800;margin-bottom:4px}
.course-card .term{font-size:12px;color:var(--sub);display:flex;align-items:center;gap:6px}
.course-card .bd{padding:12px 18px 14px}
.course-card .intro{font-size:12px;color:var(--sub);line-height:1.55;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:34px}
.course-card .prog{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--sub)}
.course-card .prog .pbar{flex:1}
.course-card .ft{padding:10px 18px;border-top:1px solid var(--line2);display:flex;gap:8px;background:#fcfdff}
.course-card .ft .btn{flex:1}

/* ============ 模块卡（学生） ============ */
.mod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.mod-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;box-shadow:var(--shadow);transition:.2s;display:flex;flex-direction:column}
.mod-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.mod-card .head{padding:14px 16px;background:linear-gradient(135deg,#0b1328,#1a2f55 70%,#243f72);color:#fff;display:flex;align-items:center;gap:10px}
.mod-card .head .ic{width:36px;height:36px;border-radius:12px;background:rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;font-size:17px;flex:none}
.mod-card .head h3{font-size:14px;font-weight:700;line-height:1.35}
.mod-card .head small{color:#aeb9cf;font-size:11px}
.mod-card .bd{padding:12px 16px;flex:1}
.mod-card .tasks{display:flex;gap:6px;margin:8px 0}
.mod-card .tk{flex:1;text-align:center;padding:6px 2px;border-radius:11px;font-size:11px;background:#f4f6fa;color:var(--sub2);border:1px solid var(--line2)}
.mod-card .tk.done{background:var(--ok-l);color:var(--ok);border-color:#bfe8d2;font-weight:700}
.mod-card .ft{padding:10px 16px;border-top:1px solid var(--line2);display:flex;gap:8px;background:#fcfdff}
.mod-card .ft .btn{flex:1}
.mod-card .ddl{font-size:11px;color:var(--warn);display:flex;align-items:center;gap:4px}

/* ============ 弹窗 ============ */
.modal-mask{position:fixed;inset:0;background:rgba(8,14,28,.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal{background:#fff;border-radius:22px;width:100%;max-width:460px;padding:24px;max-height:88vh;overflow:auto;box-shadow:0 30px 80px rgba(0,0,0,.28);animation:pop .2s cubic-bezier(.2,.8,.2,1)}
.modal.wide{max-width:680px}
.modal.xwide{max-width:880px}
@keyframes pop{from{transform:scale(.96) translateY(8px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}
.modal h3{font-size:16px;margin-bottom:16px;font-weight:800;display:flex;align-items:center;gap:8px}
.modal h3 .x{margin-left:auto;cursor:pointer;color:var(--sub2);font-weight:400;font-size:18px;line-height:1;padding:4px 8px;border-radius:10px;transition:.15s}
.modal h3 .x:hover{background:#f1f4f9;color:var(--txt)}
.modal .ft{display:flex;gap:10px;justify-content:flex-end;margin-top:16px}

/* ============ Toast ============ */
.toast-wrap{position:fixed;top:70px;left:50%;transform:translateX(-50%);z-index:100;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:#0d182c;color:#fff;padding:11px 20px;border-radius:14px;font-size:13px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:8px;animation:tin .25s cubic-bezier(.2,.8,.2,1);max-width:80vw}
.toast.ok::before{content:"✓";color:#4ade80;font-weight:700}
.toast.err::before{content:"✕";color:#ff8a8a;font-weight:700}
@keyframes tin{from{transform:translateY(-10px) scale(.98);opacity:0}to{transform:none;opacity:1}}

/* ============ Tabs（页内切换） ============ */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;overflow-x:auto}
.tabs .t{padding:9px 16px;font-size:13.5px;color:var(--sub);cursor:pointer;border-bottom:2px solid transparent;white-space:nowrap;font-weight:700;transition:.15s;border-radius:10px 10px 0 0}
.tabs .t:hover{color:var(--txt);background:rgba(59,108,255,.04)}
.tabs .t.on{color:var(--pri);border-bottom-color:var(--pri)}

/* ============ 分段选择 ============ */
.seg{display:inline-flex;background:#eef2f9;border-radius:13px;padding:4px;gap:2px}
.seg .s{padding:6px 14px;border-radius:10px;font-size:12.5px;color:var(--sub);cursor:pointer;font-weight:700;border:none;background:transparent;white-space:nowrap;transition:.15s}
.seg .s.on{background:#fff;color:var(--pri);box-shadow:0 2px 8px rgba(15,30,60,.1)}

/* ============ 空状态引导 ============ */
.guide{background:linear-gradient(135deg,#f0f5ff,#fbfcff);border:1px dashed #c9d8f5;border-radius:var(--radius);padding:22px;text-align:center;color:var(--sub)}
.guide .n{width:26px;height:26px;border-radius:50%;background:var(--pri);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin:0 4px}
.guide h3{color:var(--txt);font-size:15px;margin-bottom:8px}
.guide .steps{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:12px}
.guide .step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 14px;font-size:12px;max-width:200px;text-align:left}
.guide .step b{display:flex;align-items:center;gap:6px;color:var(--txt);font-size:12.5px;margin-bottom:2px}

/* ============ AI 聊天 ============ */
.chat-box{display:flex;flex-direction:column;height:calc(100vh - 220px);min-height:420px}
.chat-msgs{flex:1;overflow-y:auto;padding:16px;background:#f6f8fc;border:1px solid var(--line);border-radius:var(--radius) var(--radius) 0 0}
.msg{margin-bottom:14px;display:flex;gap:10px;max-width:88%}
.msg .av{width:32px;height:32px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:15px;flex:none}
.msg.user{margin-left:auto;flex-direction:row-reverse}
.msg.user .av{background:var(--pri-g);color:#fff}
.msg.ai .av{background:#0d182c;color:#7dd3fc}
.msg .bub{padding:11px 15px;border-radius:16px;font-size:13.5px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.msg.user .bub{background:var(--pri-g);color:#fff;border-top-right-radius:6px}
.msg.ai .bub{background:#fff;border:1px solid var(--line);border-top-left-radius:6px}
.msg.ai .bub.err{background:var(--danger-l);border-color:#f5c6c8;color:#a33}
.msg .time{font-size:10.5px;color:var(--sub2);margin-top:4px}
.chat-input{display:flex;gap:10px;padding:12px;background:#fff;border:1px solid var(--line);border-top:none;border-radius:0 0 var(--radius) var(--radius)}
.chat-input textarea{flex:1;border:1px solid var(--line3);border-radius:13px;padding:10px 12px;resize:none;height:46px;outline:none;font-size:13.5px}
.chat-input textarea:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(59,108,255,.12)}
.typing{display:inline-flex;gap:4px;padding:4px 0}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--sub2);animation:bl 1s infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes bl{0%,100%{opacity:.25}50%{opacity:1}}
.quick-q{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.quick-q .q{background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:12px;color:var(--sub);cursor:pointer;transition:.15s}
.quick-q .q:hover{border-color:var(--pri);color:var(--pri);background:var(--pri-l)}

/* ============ 答题 ============ */
.quiz-q{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin-bottom:12px;background:#fff}
.quiz-q .stem{font-weight:700;font-size:13.5px;margin-bottom:10px;display:flex;gap:8px}
.quiz-q .stem .no{color:var(--pri);flex:none}
.quiz-q .opt{display:flex;align-items:flex-start;gap:9px;padding:8px 12px;border:1px solid var(--line2);border-radius:13px;margin-bottom:7px;cursor:pointer;font-size:13px;transition:.15s;background:#fcfdff}
.quiz-q .opt:hover{border-color:#c9d8f5;background:#f6f9ff}
.quiz-q .opt.sel{border-color:var(--pri);background:var(--pri-l);font-weight:600}
.quiz-q .opt.right{border-color:#7fd6a5;background:var(--ok-l)}
.quiz-q .opt.wrong{border-color:#f2b0b2;background:var(--danger-l)}
.quiz-q .opt .lt{font-weight:700;color:var(--pri);flex:none}
.quiz-q .expl{margin-top:8px;padding:10px 12px;background:#f6f8fc;border-radius:12px;font-size:12.5px;color:var(--sub);border-left:3px solid var(--pri)}
.quiz-q .expl b{color:var(--ok)}
.exam-timer{position:sticky;top:0;z-index:5;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:10px 16px;margin-bottom:14px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow)}
.exam-timer .t{font-size:20px;font-weight:800;color:var(--pri);font-variant-numeric:tabular-nums}
.exam-timer .t.warn{color:var(--danger);animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.5}}

/* ============ 雷达/趋势 简易图 ============ */
.bars{display:flex;flex-direction:column;gap:10px}
.bar-row{display:flex;align-items:center;gap:10px;font-size:12.5px}
.bar-row .lb{width:92px;color:var(--sub);flex:none;text-align:right}
.bar-row .pbar{flex:1;height:9px}
.bar-row .vv{width:56px;font-weight:700;flex:none}
.week-bars{display:flex;align-items:flex-end;gap:14px;height:110px;padding:10px 6px 0}
.week-bars .wb{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.week-bars .wb .bar{width:70%;max-width:44px;background:var(--pri-g);border-radius:8px 8px 3px 3px;min-height:3px;transition:height .4s}
.week-bars .wb .lb{font-size:11px;color:var(--sub)}
.week-bars .wb .vv{font-size:11px;font-weight:700;color:var(--txt)}

/* ============ 零件图鉴 ============ */
.part-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.part-card{border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px;background:var(--card-g)}
.part-card h4{font-size:13px;display:flex;align-items:center;gap:7px;margin-bottom:6px}
.part-card h4 .no{width:20px;height:20px;border-radius:7px;background:var(--pri-l);color:var(--pri);font-size:11px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;flex:none}
.part-card p{font-size:12px;color:var(--sub);line-height:1.6}

/* ============ 日志 ============ */
.log-row .act{font-weight:700;font-size:12.5px}
.log-time{font-size:11.5px;color:var(--sub2);font-variant-numeric:tabular-nums;white-space:nowrap}

/* ============ 其他 ============ */
.back-link{color:var(--pri);cursor:pointer;font-size:13px;margin-bottom:12px;display:inline-flex;align-items:center;gap:4px;font-weight:700}
.back-link:hover{text-decoration:underline}
.kv{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line2);font-size:13px}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--sub);flex:none}
.kv .v{font-weight:600;text-align:right}
.hint-box{background:#f6f8fc;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font-size:12.5px;color:var(--sub);line-height:1.7;margin-bottom:12px}
.hint-box b{color:var(--txt)}
.num-badge{display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;border-radius:999px;background:var(--pri-l);color:var(--pri-d);font-size:11.5px;font-weight:800;padding:0 7px}
.markdown-lite{white-space:pre-wrap;font-size:13px;line-height:1.8}
.divider{height:1px;background:var(--line);margin:14px 0}
.scroll-y{max-height:340px;overflow-y:auto}

@media(max-width:960px){
  .stat-grid,.grid4{grid-template-columns:repeat(2,1fr)}
  .grid3{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
}
@media(max-width:760px){
  aside.side{width:100%;position:fixed;top:auto;bottom:0;left:0;right:0;height:auto;flex-direction:row;background:var(--side);border-top:1px solid var(--side-line);z-index:40;box-shadow:0 -4px 20px rgba(7,14,28,.3)}
  .side-brand,.side-role,.side-foot,nav .nav-group{display:none}
  nav{display:flex;overflow-x:auto;padding:4px 6px;flex:1}
  nav .nav-card{border:none;background:transparent;display:flex;padding:0;margin:0}
  nav .nav-card-title{display:none}
  nav .item{flex-direction:column;gap:2px;font-size:10.5px;padding:6px 10px;margin:0;text-align:center;min-width:56px;border-radius:10px}
  nav .item .ico{font-size:16px}
  nav .item.on{box-shadow:none;background:rgba(59,108,255,.28)}
  .main-col{margin-left:0;padding-bottom:64px}
  main{padding:14px 12px 30px}
  header.top{padding:0 12px}
  .stat-grid,.grid4{grid-template-columns:1fr 1fr}
  .chat-box{height:calc(100vh - 260px)}
}

/* ============ V3：课程横条列表 ============ */
.course-rows{display:flex;flex-direction:column;gap:10px}
.course-row{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card-g);padding:14px 16px;box-shadow:var(--shadow);transition:.2s}
.course-row:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}
.course-row .info{flex:1;min-width:0;cursor:pointer}
.course-row .info h3{font-size:15px;margin-bottom:4px;font-weight:800}
.course-row .meta{font-size:12px;color:var(--sub);margin-bottom:2px}
.course-row .intro-line{font-size:12px;color:var(--sub2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.course-row .acts{display:flex;gap:8px;flex:none}

/* ============ V3：开放设置板块面板 ============ */
.sec-panel{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(160deg,#fffdf8,#f8fafc);margin-bottom:16px;overflow:hidden;box-shadow:var(--shadow)}
.sec-panel .sec-head{display:flex;align-items:center;gap:12px;padding:12px 18px;background:#fff}
.sec-panel .sec-head h3{font-size:16px;font-weight:800;border:1.5px solid var(--txt);border-radius:12px;padding:4px 14px;background:#fff}
.sec-panel .sec-stat{font-size:12.5px;color:var(--sub)}
.sec-panel .sec-body-row{display:flex;gap:16px;padding:14px 18px 18px}
.sec-panel .sec-cover{width:200px;min-width:200px;height:150px;border-radius:14px;overflow:hidden;background:#eef3fa;display:flex;align-items:center;justify-content:center}
.sec-panel .sec-cover img{width:100%;height:100%;object-fit:cover}
.sec-panel .sec-cover .ph{font-size:40px}
.sec-panel .sec-table{flex:1;min-width:0}
.sec-panel table thead th{background:var(--pri);color:#fff;font-size:13px;border-radius:0}
.sec-panel table thead th:first-child{border-radius:12px 0 0 12px}
.sec-panel table thead th:last-child{border-radius:0 12px 12px 0}
.open-state{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600}
.open-state.on{color:var(--ok)}
.open-state.off{color:var(--txt)}
.open-state .ddl{font-size:11px;font-weight:400;color:var(--sub);margin-left:6px}

/* ============ V3：三段任务点 ============ */
.stage-dot{width:10px;height:10px;border-radius:50%;background:var(--line);display:inline-block;flex:none}
.stage-dot.on{background:var(--ok);box-shadow:0 0 0 3px var(--ok-l)}
.link-btn{background:none;border:none;padding:0;cursor:pointer}
.btn-ok{background:var(--ok-l);border-color:var(--ok);color:var(--ok);font-weight:700}
.chip{font-size:11.5px;padding:3px 10px;border-radius:999px;background:#eef2f8;color:var(--sub);border:1px solid var(--line)}
.chip.ok{background:var(--ok-l);color:var(--ok);border-color:var(--ok)}

/* ============ 登录背景图预览 ============ */
.loginbg-preview{width:100%;max-width:420px;height:150px;border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-bottom:12px;background:#f1f4f9}
.loginbg-preview img{width:100%;height:100%;object-fit:cover;display:block}

/* ============ 教学建设概览 ============ */
.ov-list{display:flex;flex-direction:column;gap:14px}
.ov-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow);overflow:hidden;transition:.2s}
.ov-card:hover{box-shadow:var(--shadow-lg)}
.ov-head{display:flex;align-items:center;gap:14px;padding:14px 18px;cursor:pointer;background:linear-gradient(120deg,#f4f8ff 0%,#eaf1fc 100%)}
.ov-avatar{width:46px;height:46px;border-radius:14px;background:var(--pri-g);color:#fff;font-size:19px;font-weight:800;display:flex;align-items:center;justify-content:center;flex:none;box-shadow:0 6px 16px rgba(59,108,255,.3)}
.ov-hinfo{flex:1;min-width:0}
.ov-name{font-size:15px;font-weight:800}
.ov-username{font-size:12px;color:var(--sub);font-weight:400;margin-left:8px}
.ov-tags{display:flex;align-items:center;gap:6px;margin-top:5px;flex-wrap:wrap}
.ov-hours{font-size:11.5px;color:var(--sub2);margin-left:4px}
.ov-caret{color:var(--sub2);font-size:14px;transition:.2s;flex:none}
.ov-caret.open{transform:rotate(180deg)}
.ov-body{padding:6px 18px 16px;border-top:1px solid var(--line2)}
.ov-sec{margin-top:14px}
.ov-sec h4{font-size:13.5px;font-weight:800;margin-bottom:9px}
.ov-table-wrap{overflow-x:auto}
.ov-table{width:100%;border-collapse:separate;border-spacing:0;font-size:12.5px}
.ov-table th{background:#f4f7fc;color:var(--sub);font-weight:700;padding:8px 10px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--line)}
.ov-table td{padding:8px 10px;border-bottom:1px solid var(--line2);vertical-align:middle}
.ov-table tr:hover td{background:rgba(59,108,255,.03)}
.ov-table .cname{font-weight:700;white-space:nowrap}
.ov-table .dim{color:var(--sub2)}
.cls-chips{display:flex;gap:5px;flex-wrap:wrap;max-width:260px}
.cls-chip{font-size:11px;padding:2px 8px;border-radius:999px;background:#eef2f8;color:var(--sub);border:1px solid var(--line);white-space:nowrap}
.cls-chip b{margin-left:4px;color:var(--pri)}
.ov-prog{display:flex;align-items:center;gap:8px;min-width:130px}
.ov-prog span{font-size:11.5px;color:var(--sub);white-space:nowrap}
.ov-plans{display:flex;flex-direction:column;gap:10px}
.ov-plan{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:linear-gradient(120deg,#fafbff 0%,#f2f6fd 100%)}
.ov-plan-main{flex:1;min-width:0}
.ov-plan-name{font-size:14px;font-weight:800;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.ov-plan-intro{font-size:12px;color:var(--sub);margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ov-plan-meta{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--sub2);margin-top:6px;flex-wrap:wrap}
.ov-plan-meta .dot{width:3px;height:3px;border-radius:50%;background:#cfd6e4}
.ov-plan-acts{display:flex;gap:8px;flex:none}

.cfg-ro input,.cfg-ro select,.cfg-ro textarea,.cfg-ro button{pointer-events:none}
.cfg-ro .chip{cursor:default}
.cfg-ro input,.cfg-ro select,.cfg-ro textarea{background:#f6f8fb;color:var(--sub)}

/* ============ 数据中心：醒目刷新按钮 ============ */
.btn-refresh{padding:11px 24px;font-size:14.5px;border-radius:14px;letter-spacing:.5px;box-shadow:0 6px 18px rgba(59,108,255,.32)}
.btn-refresh:hover:not(:disabled){box-shadow:0 10px 24px rgba(59,108,255,.42);transform:translateY(-1px)}

/* ============ 数据中心：统计卡渐变配色 ============ */
.stat.stat-v1,.stat.stat-v2,.stat.stat-v3,.stat.stat-v4,
.stat.stat-v5,.stat.stat-v6,.stat.stat-v7,.stat.stat-v8{border-color:transparent}
.stat.stat-v1::after,.stat.stat-v2::after,.stat.stat-v3::after,.stat.stat-v4::after,
.stat.stat-v5::after,.stat.stat-v6::after,.stat.stat-v7::after,.stat.stat-v8::after{
  content:"";position:absolute;right:-26px;top:-26px;width:100px;height:100px;border-radius:50%;background:rgba(255,255,255,.32)}
.stat.stat-v1{background:linear-gradient(135deg,#eef4ff 0%,#dce9ff 100%)}
.stat.stat-v2{background:linear-gradient(135deg,#f4efff 0%,#e6dcff 100%)}
.stat.stat-v3{background:linear-gradient(135deg,#ecfbf3 0%,#d7f5e5 100%)}
.stat.stat-v4{background:linear-gradient(135deg,#fff6ea 0%,#ffe9cc 100%)}
.stat.stat-v5{background:linear-gradient(135deg,#e9f7ff 0%,#d3edff 100%)}
.stat.stat-v6{background:linear-gradient(135deg,#ecfdf5 0%,#d1fae5 100%)}
.stat.stat-v7{background:linear-gradient(135deg,#fdf0ff 0%,#f7ddff 100%)}
.stat.stat-v8{background:linear-gradient(135deg,#fff2f3 0%,#ffe0e3 100%)}
.stat.stat-v1 .v,.stat.stat-v2 .v,.stat.stat-v3 .v,.stat.stat-v4 .v,
.stat.stat-v5 .v,.stat.stat-v6 .v,.stat.stat-v7 .v,.stat.stat-v8 .v{position:relative;z-index:1}
.stat.stat-v1 .k,.stat.stat-v2 .k,.stat.stat-v3 .k,.stat.stat-v4 .k,
.stat.stat-v5 .k,.stat.stat-v6 .k,.stat.stat-v7 .k,.stat.stat-v8 .k{position:relative;z-index:1;color:#5c6b80}
.stat.stat-v1 .ic,.stat.stat-v2 .ic,.stat.stat-v3 .ic,.stat.stat-v4 .ic,
.stat.stat-v5 .ic,.stat.stat-v6 .ic,.stat.stat-v7 .ic,.stat.stat-v8 .ic{background:#fff;box-shadow:0 3px 12px rgba(15,30,60,.1)}

/* ============ 方案：模块自由勾选 ============ */
.pick-sec{display:inline-flex;align-items:center;gap:5px;margin-right:10px;font-size:12px;color:var(--sub);cursor:pointer;font-weight:600}
.pick-sec input{width:14px;height:14px;cursor:pointer}
.pick-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(218px,1fr));gap:10px;padding:0 14px 14px}
.pick-mod{display:flex;align-items:flex-start;gap:9px;border:1.5px solid var(--line);border-radius:13px;padding:10px 12px;cursor:pointer;transition:.18s;background:#fff}
.pick-mod:hover{border-color:#a9c4ff;background:#fbfdff}
.pick-mod.on{border-color:var(--pri);background:linear-gradient(135deg,#f2f7ff 0%,#e8f1ff 100%);box-shadow:0 4px 14px rgba(59,108,255,.14)}
.pick-mod.ro{cursor:default}
.pick-mod input{width:15px;height:15px;margin-top:2px;flex:none;cursor:pointer}
.pick-mod .t{font-size:13px;font-weight:700;color:var(--fg);display:block}
.pick-mod .d{font-size:11px;color:var(--sub2);display:block;margin-top:3px}
.pick-mod.on .t{color:#1f4fd8}

/* ============ 配置弹窗：分数权重区 ============ */
.w-box{border:1px solid var(--line);border-radius:16px;padding:13px 15px;background:linear-gradient(120deg,#fbfcff 0%,#f2f6ff 100%);margin-bottom:13px}
.w-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.w-head b{font-size:13.5px}
.w-sum{font-size:12.5px;font-weight:700;color:var(--ok);background:#eafaf1;border-radius:999px;padding:3px 12px}
.w-sum.bad{color:#d4380d;background:#fff1f0}
.w-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.w-item label{font-size:12px;color:var(--sub);font-weight:600;display:block;margin-bottom:5px}
.w-input{display:flex;align-items:center;gap:6px;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:0 11px}
.w-input:focus-within{border-color:var(--pri)}
.w-input input{border:0;outline:0;padding:8px 0;width:100%;font-size:15px;font-weight:700;color:var(--pri)}
.w-input i{font-style:normal;font-size:13px;color:var(--sub2);font-weight:600}
.w-err{margin-top:9px;font-size:12px;color:#d4380d;font-weight:600}
.w-tip{margin-top:9px;font-size:11.5px;color:var(--sub2)}

/* ============ 配置弹窗：标签页主体 ============ */
.tab-body{padding-top:14px}
.sec-block{border:1px solid var(--line);border-radius:14px;padding:13px 15px;margin-bottom:13px;background:#fff}
.sec-block-head{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.sec-block-head b{font-size:13px}
.sec-block-head span{font-size:11.5px;color:var(--sub2);flex:1;min-width:0}
.sec-block-head .btn{flex:none}
.pv-hint{font-size:11.5px;color:var(--sub2)}

/* ============ 练前预习：任务点列表 + 浏览窗口 ============ */
.pv-layout{display:grid;grid-template-columns:minmax(280px,38%) 1fr;gap:14px}
.pv-left{min-width:0}
.pv-right{min-width:0}
.pv-toolbar{display:flex;align-items:center;gap:9px;margin-bottom:9px;flex-wrap:wrap}
.pv-list{max-height:330px;overflow-y:auto;border:1px solid var(--line);border-radius:14px;padding:6px}
.pv-task{display:flex;align-items:center;gap:9px;padding:8px 9px;border-radius:12px;cursor:pointer;transition:.15s;border:1.5px solid transparent}
.pv-task:hover{background:#f5f8ff}
.pv-task.on{background:#eaf2ff;border-color:var(--pri)}
.pv-task .ic{font-size:19px;flex:none}
.pv-task .tx{flex:1;min-width:0}
.pv-task .tx b{display:block;font-size:12.5px;font-weight:700}
.pv-task .tx em{display:block;font-size:11px;color:var(--sub2);font-style:normal;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pv-task .op{display:flex;gap:3px;flex:none}
.pv-task .op .btn{padding:2px 6px;font-size:11px}
.pv-view-title{display:flex;align-items:center;gap:9px;margin-bottom:7px;font-size:12.5px;font-weight:700}
.pv-view{height:330px;border:1px solid var(--line);border-radius:14px;background:#f5f8fc;overflow-y:auto;display:flex;align-items:center;justify-content:center}
.pv-view img,.pv-view video{max-width:100%;max-height:100%;object-fit:contain;display:block}
.pv-view iframe{width:100%;height:100%;border:0;background:#fff}
.pv-fallback{text-align:center;padding:26px;max-width:300px}
.pv-fallback .big{font-size:44px;margin-bottom:10px}
.pv-fallback b{display:block;font-size:13.5px;margin-bottom:5px;word-break:break-all}
.pv-fallback span{display:block;font-size:11.5px;color:var(--sub2);margin-bottom:13px;line-height:1.6}

/* ============ 虚拟仿真：功能按键清单 ============ */
.sim-add{display:flex;gap:8px;margin-bottom:10px}
.sim-add input{flex:1;min-width:0}
.sim-list{display:flex;flex-direction:column;gap:7px}
.sim-item,.order-item{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:13px;padding:8px 11px;background:#fcfdff}
.sim-item .no,.order-item .no{width:22px;height:22px;border-radius:50%;background:var(--pri);color:#fff;font-size:11.5px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none}
.sim-item b,.order-item b{flex:1;min-width:0;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sim-item .op,.order-item .op{display:flex;gap:4px;flex:none}
.sim-item .op .btn,.order-item .op .btn{padding:3px 8px;font-size:11.5px}
.sim-quick{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:11px;padding-top:11px;border-top:1px dashed var(--line2)}
.sim-quick .lbl{font-size:11.5px;color:var(--sub2);font-weight:600}
.order-list{display:flex;flex-direction:column;gap:7px}

/* ============ 考核模拟：理论题 ============ */
.q-tools{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.ai-box{border:1px solid #e3dcff;border-radius:14px;padding:11px 13px;background:linear-gradient(120deg,#fcfaff 0%,#f5efff 100%);margin-bottom:11px}
.ai-head{font-size:12.5px;font-weight:700;margin-bottom:8px}
.ai-head span{font-weight:400;font-size:11.5px;color:var(--sub2);margin-left:7px}
.ai-draft{max-height:190px;margin-top:9px;border:1px solid var(--line);border-radius:12px;padding:7px;background:#fff}
.ai-draft label{display:flex;gap:8px;font-size:12px;padding:5px 2px;align-items:flex-start;border-bottom:1px dashed var(--line2)}
.ai-draft label input{margin-top:3px;flex:none}
.ai-draft label em{font-style:normal;color:var(--sub2);font-size:11px}
.q-list{max-height:330px;border:1px solid var(--line);border-radius:14px;padding:8px;background:#fcfdff}
.q-item{border-bottom:1px dashed var(--line2);padding:9px 0}
.q-item:last-child{border-bottom:0}
.q-head{display:flex;gap:7px;align-items:center;margin-bottom:6px}
.q-head input{flex:1;min-width:0}
.q-head .btn{padding:3px 7px;font-size:11.5px}
.part-pick{display:flex;flex-wrap:wrap;gap:7px;align-items:center}
.part-pick .chip{cursor:pointer}

/* ============ AI 题库管理 ============ */
.qb-toolbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:4px}
.qb-card{display:flex;align-items:center;gap:7px;flex-wrap:wrap;padding:7px 12px;
  border:1.5px dashed var(--pri);border-radius:14px;background:var(--pri-l)}
.qb-card-title{font-size:12.5px;font-weight:700;color:var(--pri-d);margin-right:2px;white-space:nowrap}
.qb-topics{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:11px}
.qb-topic{border:1px solid var(--line);border-radius:14px;padding:11px 13px;background:var(--card-g);transition:.18s}
.qb-topic:hover{border-color:var(--pri);box-shadow:var(--shadow)}
.qb-topic-head{display:flex;align-items:baseline;gap:8px;margin-bottom:7px}
.qb-topic-head b{font-size:13.5px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.qb-topic-n{font-size:11.5px;color:var(--sub2);font-weight:600;flex:none}
.qb-topic-acts{display:flex;gap:6px;margin-top:9px}
.qb-topic-acts .btn{flex:1}
.qb-topic-intro{margin-top:8px;font-size:11.5px;color:var(--sub2);line-height:1.55;
  border-top:1px dashed var(--line2);padding-top:7px}
.qb-search{display:flex;gap:11px;flex-wrap:wrap;align-items:flex-end;
  padding:11px 13px;margin-bottom:12px;background:#f4f7fc;border-radius:14px}
.qb-sf{display:flex;flex-direction:column;gap:4px;min-width:148px}
.qb-sf label{font-size:11.5px;font-weight:700;color:var(--sub)}
.qb-sf select,.qb-sf input{padding:6px 9px;border:1px solid var(--line3);border-radius:11px;font-size:12.5px;background:#fff}
.qb-sf:last-child{flex-direction:row;gap:6px;align-items:center}
.qb-gen-item{display:flex;gap:9px;align-items:flex-start;padding:9px 6px;border-bottom:1px dashed var(--line2)}
.qb-gen-item:last-child{border-bottom:0}
.qb-gen-item>input{margin-top:4px;flex:none}
.qb-bulk-row{border:1px solid var(--line);border-radius:14px;padding:11px 13px;margin-bottom:10px;background:#fcfdff}
.qb-bulk-row.off{opacity:.55}
.qb-bulk-head{display:flex;align-items:center;gap:9px;margin-bottom:9px}
.qb-bulk-head label{flex:1;min-width:0;font-size:13px}
.qb-bulk-body{display:flex;gap:10px;flex-wrap:wrap}
.qb-bulk-body .field label{font-size:11.5px;font-weight:700;color:var(--sub);display:block;margin-bottom:4px}
.qb-bulk-body .field input{width:100%}
.qb-dims{display:flex;flex-direction:column;gap:7px}
.qb-dim{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border:1.5px solid var(--line);
  border-radius:12px;cursor:pointer;transition:.15s;background:#fff}
.qb-dim:hover{border-color:var(--pri)}
.qb-dim.on{border-color:var(--pri);background:var(--pri-l)}
.qb-dim input{margin-top:3px;flex:none}
.qb-dim span{flex:1;min-width:0}
.qb-dim b{font-size:12.5px;display:block}
.qb-dim small{font-size:11.5px;color:var(--sub2);line-height:1.5;display:block;margin-top:1px}
.qb-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:12px}
.qb-ana-card{border:1px solid var(--line);border-left:3.5px solid var(--purple);border-radius:14px;
  padding:13px 15px;background:linear-gradient(135deg,#fdfcff 0%,#f8f5ff 100%)}
.qb-ana-title{font-size:13.5px;font-weight:700;color:var(--purple);margin-bottom:8px}
.qb-ana-body{font-size:12.5px;color:var(--sub);line-height:1.72;white-space:pre-wrap;max-height:340px;overflow:auto}
.seg-disabled{opacity:.6}
.seg-disabled .s{cursor:not-allowed}

/* ==== 第八章 虚拟仿真管理 ==== */
.plan-ch8-pick h2{font-size:15px;margin-bottom:8px}
.plan-ch8-pick h2 .sub{font-size:11.5px;color:var(--sub2);font-weight:400;margin-left:8px}
.plan-ch8-pick h2 .right{margin-left:auto;display:flex;gap:6px}
.plan-ch8-sec{border:1px solid var(--line);border-radius:14px;margin-bottom:8px;overflow:hidden;background:#fff}
.plan-ch8-sec-head{display:flex;align-items:center;gap:8px;padding:7px 12px;background:#fafbfd;border-bottom:1px solid var(--line2)}
.plan-ch8-sec-head .pick-sec{font-size:13px;font-weight:700}
.plan-ch8-sec-head .pick-sec span{font-size:13px}
.plan-ch8-sec-title{font-size:13px;font-weight:700;color:var(--fg)}
.plan-ch8-sec-stat{margin-left:auto;font-size:11px;color:var(--sub2);font-weight:600;background:#f0f3fa;padding:2px 8px;border-radius:999px}
.plan-ch8-mod-scroll{display:flex;gap:6px;padding:8px 10px;overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch}
.plan-ch8-mod-scroll::-webkit-scrollbar{height:4px}
.plan-ch8-mod-scroll::-webkit-scrollbar-thumb{background:#d0d7e6;border-radius:4px}
.plan-ch8-mod{display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:11px;padding:6px 10px;cursor:pointer;transition:.15s;background:#fff;flex:none;min-width:140px;max-width:220px}
.plan-ch8-mod:hover{border-color:#a9c4ff;background:#fbfdff}
.plan-ch8-mod.on{border-color:var(--pri);background:linear-gradient(135deg,#f2f7ff 0%,#e8f1ff 100%)}
.plan-ch8-mod.ro{cursor:default}
.plan-ch8-mod input{width:14px;height:14px;flex:none;cursor:pointer}
.plan-ch8-mod .t{font-size:12px;font-weight:600;color:var(--fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.plan-ch8-mod .d{font-size:10px;color:var(--sub2);white-space:nowrap}
.plan-ch8-mod.on .t{color:#1f4fd8}
.plan-ch8-highlight{border:2px solid var(--pri);border-radius:18px;background:linear-gradient(135deg,#f8faff 0%,#eef3ff 100%);margin-bottom:14px}
.plan-ch8-highlight h2{font-size:15px;margin-bottom:10px;color:var(--pri)}
.plan-ch8-ai{padding:12px 16px;border-bottom:1px solid var(--line2)}
.plan-ch8-ai-head{display:flex;align-items:baseline;gap:8px;margin-bottom:8px}
.plan-ch8-ai-head b{font-size:14px;color:var(--pri)}
.plan-ch8-ai-head .sub{font-size:11.5px;color:var(--sub2)}
.plan-ch8-batch-files{margin-top:8px;padding:8px 10px;background:#fff;border:1px solid var(--line2);border-radius:12px}
.plan-ch8-batch-files .sub{font-size:11px;color:var(--sub2);display:block;margin-bottom:4px}
.plan-ch8-file-tags{display:flex;flex-wrap:wrap;gap:4px}
.plan-ch8-weight{padding:12px 16px}
.plan-ch8-weight-head{display:flex;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap}
.plan-ch8-weight-head b{font-size:14px}
.plan-ch8-weight-head .sub{font-size:11.5px;color:var(--sub2);flex:1;min-width:0}
.plan-ch8-weight-head .right{margin-left:auto;display:flex;gap:6px}
.plan-ch8-weight-body{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px}
.plan-ch8-w-tabs{display:flex;gap:6px;margin-bottom:10px}
.plan-ch8-w-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:8px}
.plan-ch8-w-item label{font-size:12px;color:var(--sub);font-weight:600;display:block;margin-bottom:4px}
.plan-ch8-w-sec{margin-bottom:12px}
.plan-ch8-w-sec-head{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.plan-ch8-w-sec-head b{font-size:13px}
.plan-ch8-weight-summary{font-size:12px;color:var(--sub)}
.plan-ch8-w-summary-row{padding:6px 0;border-bottom:1px solid var(--line2)}
.plan-ch8-w-summary-row:last-child{border-bottom:none}
.plan-ch8-w-summary-sec{font-weight:700;color:var(--fg);display:block;margin-bottom:3px}
.plan-ch8-w-summary-mods{display:flex;flex-wrap:wrap;gap:4px}
.plan-ch8-config{border:2px solid #e8a830;border-radius:18px;background:linear-gradient(135deg,#fffdf5 0%,#fff8e8 100%);margin-bottom:14px}
.plan-ch8-config h2{font-size:15px;margin-bottom:10px;color:#b87a00}
.plan-ch8-config h2 .sub{font-size:11.5px;color:var(--sub2);font-weight:400;margin-left:8px}
.plan-ch8-cfg-sec{margin-bottom:10px}
.plan-ch8-cfg-sec-head{padding:6px 12px;background:rgba(232,168,48,.1);border-radius:10px;margin-bottom:8px}
.plan-ch8-cfg-sec-head h3{font-size:13px;font-weight:700;margin:0}
.plan-ch8-cfg-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:8px;padding:0 4px}
.plan-ch8-cfg-card{border:1px solid var(--line);border-radius:13px;background:#fff;padding:10px 12px;transition:.15s}
.plan-ch8-cfg-card:hover{box-shadow:var(--shadow);border-color:#e8a830}
.plan-ch8-cfg-card-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:6px}
.plan-ch8-cfg-card-head b{font-size:13px;font-weight:700}
.plan-ch8-cfg-card-body{display:flex;flex-direction:column;gap:4px}
.plan-ch8-cfg-stat{display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.plan-ch8-cfg-dur{font-size:11px;color:var(--sub2)}

/* ==== 第四章 课程管理 ==== */
.c4-card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:14px}
@media(max-width:720px){.c4-card-grid{grid-template-columns:1fr}}
.c4-card{position:relative;border-radius:18px;padding:18px 20px;display:flex;flex-direction:column;gap:8px;transition:.2s;cursor:default}
.c4-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.c4-card-row1{display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.c4-card-name{font-size:17px;font-weight:800;margin:0;line-height:1.3}
.c4-card-term{font-size:12px;opacity:.75;white-space:nowrap}
.c4-card-intro{font-size:13px;line-height:1.5;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;opacity:.85}
.c4-card-plan{font-size:12.5px;opacity:.8}
.c4-card-classes{display:flex;flex-direction:column;gap:2px;font-size:12.5px;opacity:.85}
.c4-card-cl{line-height:1.5}
.c4-cl-cnt{font-size:11px;opacity:.7;margin-left:2px}
.c4-no-cl{opacity:.5;font-style:italic}
.c4-card-acts{display:flex;gap:8px;margin-top:auto;padding-top:8px}
.c4-card-badge{position:absolute;top:12px;right:14px}
.c4-guide{text-align:center;padding:60px 20px;color:var(--sub)}
.c4-guide h3{font-size:18px;margin-bottom:10px;color:var(--fg)}
.c4-empty-guide{text-align:center;padding:30px 20px}
.c4-sec-panel{border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.c4-sec-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg2);border-bottom:1px solid var(--line)}
.c4-sec-head h3{margin:0;font-size:14px}
.c4-sec-stat{font-size:12px;color:var(--sub2)}
.c4-w-summary{padding:8px 0}
.c4-w-row{padding:6px 0;border-bottom:1px solid var(--line2)}
.c4-w-row:last-child{border-bottom:none}
.c4-w-sec{font-weight:700;font-size:13px;display:block;margin-bottom:3px}
.c4-w-mods{display:flex;flex-wrap:wrap;gap:6px}
.c4-w-mod{font-size:12px;color:var(--sub);background:var(--bg2);padding:2px 8px;border-radius:8px}
.c4-w-total{font-size:13px;font-weight:700;margin-top:8px;padding-top:6px;border-top:1px solid var(--line)}
.c4-w-total.err{color:#d32f2f}
.c4-w-edit{border:1px solid var(--line);border-radius:13px;padding:12px;margin-bottom:10px}
.c4-w-edit-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-size:13px}
.c4-w-edit-mods{display:flex;flex-direction:column;gap:6px;padding-left:12px}
.c4-w-edit-mod{display:flex;align-items:center;gap:8px;font-size:12.5px}
.c4-w-edit-mod input{padding:4px 8px;border:1px solid var(--line);border-radius:8px;font-size:12px}
.c4-w-subtotal{font-size:12px;margin-top:6px;color:var(--sub)}
.c4-w-subtotal.err{color:#d32f2f;font-weight:700}
.c4-dist-form{max-width:560px}
.c4-sw-presets{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.c4-sw-inputs{display:flex;gap:16px;margin-bottom:10px}
.c4-sw-inputs .field{min-width:160px}
.c4-sw-inputs input{width:100px;padding:6px 10px;border:1px solid var(--line);border-radius:10px;font-size:14px}
.c4-sw-total{font-size:15px;font-weight:700;margin-bottom:6px}
.c4-sw-total.err{color:#d32f2f}
.c4-add-list{max-height:400px;overflow:auto}
.c4-add-sec{margin-bottom:12px}
.c4-add-sec h4{font-size:13px;margin:0 0 6px;color:var(--sub)}
.c4-add-item{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border:1px solid var(--line);border-radius:12px;margin-bottom:6px}
.c4-add-info{display:flex;align-items:center;gap:8px;font-size:13px}
.c4-om-tbl td{white-space:nowrap}
.c4-om-tbl .om-meta{font-size:11px;color:var(--sub2);margin-top:2px}
.c4-om-tbl .open-state .ddl{white-space:nowrap}

.c4-card.stat-v1,.c4-card.stat-v2,.c4-card.stat-v3,.c4-card.stat-v4,
.c4-card.stat-v5,.c4-card.stat-v6,.c4-card.stat-v7,.c4-card.stat-v8{
  border:1px solid transparent;box-shadow:var(--shadow)}
.c4-card.stat-v1{background:linear-gradient(135deg,#eef4ff 0%,#dce9ff 100%)}
.c4-card.stat-v2{background:linear-gradient(135deg,#f4efff 0%,#e6dcff 100%)}
.c4-card.stat-v3{background:linear-gradient(135deg,#ecfbf3 0%,#d7f5e5 100%)}
.c4-card.stat-v4{background:linear-gradient(135deg,#fff6ea 0%,#ffe9cc 100%)}
.c4-card.stat-v5{background:linear-gradient(135deg,#e9f7ff 0%,#d3edff 100%)}
.c4-card.stat-v6{background:linear-gradient(135deg,#ecfdf5 0%,#d1fae5 100%)}
.c4-card.stat-v7{background:linear-gradient(135deg,#fdf0ff 0%,#f7ddff 100%)}
.c4-card.stat-v8{background:linear-gradient(135deg,#fff2f3 0%,#ffe0e3 100%)}
.c4-card.stat-v .c4-card-name{color:#22304a}
.c4-card.stat-v .c4-card-term,.c4-card.stat-v .c4-card-plan,
.c4-card.stat-v .c4-card-classes,.c4-card.stat-v .c4-card-intro{color:#4a5a73}
.c4-card.stat-v .c4-no-cl{color:#7d8ba1}

/* ============ 学生端 · 练前预习资料行 ============ */
.atlas-row{padding:10px 12px;border-radius:13px;background:var(--card);border:1px solid var(--line)}
.atlas-row .t{display:flex;align-items:center;gap:8px;min-width:0}
.atlas-row .no{flex:none;padding:2px 8px;border-radius:7px;background:var(--pri-l);color:var(--pri-d);
  font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.3px}
.atlas-row .nm{font-size:13.5px;font-weight:600;color:var(--txt);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.atlas-row .ds{margin-top:6px;font-size:12.5px;color:var(--sub2);line-height:1.6}

/* ============ 学生端 · 我的课程（开放/历史模块） ============ */
.om-meta{font-size:11px;color:var(--sub2);margin-top:2px}
.stu-score{font-weight:800;font-size:14px;color:var(--pri);white-space:nowrap}
.stu-score.stu-muted{color:var(--sub2);font-weight:600}
.exam-lock-tip{font-size:11.5px;color:var(--warn);line-height:1.45;margin-top:6px}

/* ============ 管理员端 · 题库总览（方案管理 / AI 预习资料库 / AI 题库） ============ */
.rl-panel{padding:14px 16px}
.rl-panel-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:8px;font-size:13.5px}
.rl-panel-head b{font-size:13.5px;font-weight:800}
.rl-sub{font-size:11.5px;color:var(--sub2);font-weight:400}
.rl-tags{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.rl-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:4px 0 12px}
.rl-filter{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:12px;
  background:var(--card);border:1px solid var(--line);border-radius:14px;padding:10px 12px;box-shadow:var(--shadow)}
.rl-filter select,.rl-filter input{padding:7px 11px;border:1px solid var(--line3);border-radius:11px;background:#fff;outline:none;font-size:13px}
.rl-filter select:focus,.rl-filter input:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(59,108,255,.14)}
.rl-filter input{min-width:190px}
.rl-check{display:inline-flex;align-items:center;gap:5px;font-size:12.5px;color:var(--sub);cursor:pointer}
.rl-form-row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin-bottom:10px}
.rl-form-row .field{margin-bottom:0}
.rl-table td{vertical-align:top}
.rl-table td b{font-size:13px}
.rl-table tbody tr:hover{background:#f8fafd}
.rl-ic{font-size:15px}
.rl-teacher-card{padding:14px 16px}
.rl-teacher-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.rl-teacher-name{display:flex;align-items:center;gap:10px;font-size:14.5px}
.rl-teacher-name .ov-avatar{width:38px;height:38px;border-radius:12px;font-size:16px}

.rl-kind-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(96px,1fr));gap:8px}
.rl-kind{display:flex;flex-direction:column;align-items:center;gap:2px;padding:9px 6px;border-radius:13px;
  background:var(--pri-soft);border:1px solid var(--line);cursor:pointer;transition:.18s}
.rl-kind:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.rl-kind .ic{font-size:17px}
.rl-kind b{font-size:16px;color:var(--pri-d)}
.rl-kind .nm{font-size:11px;color:var(--sub)}
.rl-kind.off{background:#f4f6fa;opacity:.6}
.rl-kind.off b{color:var(--sub2)}
.rl-cov{display:flex;align-items:center;gap:14px;margin:6px 0}
.rl-cov-num{font-size:30px;font-weight:800;color:var(--pri);line-height:1}
.rl-cov-num i{font-size:14px;font-style:normal;margin-left:2px}
.rl-chips{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.rl-chips .chip{cursor:default}
.rl-chip-warn{background:var(--warn-l);color:var(--warn);border-color:rgba(217,119,6,.3);cursor:pointer}
.rl-chip-warn:hover{background:#ffeacd}

.rl-draft{border:1px solid var(--line);border-radius:14px;padding:10px 12px;margin-bottom:10px;background:#fbfcfe}
.rl-draft-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px;font-size:12.5px}
.rl-draft-head label{display:inline-flex;align-items:center;gap:4px;font-weight:700;color:var(--pri-d);cursor:pointer}
.rl-draft-title{flex:1;min-width:220px;padding:7px 11px;border:1px solid var(--line3);border-radius:11px;font-weight:600}
.rl-draft-body{width:100%;padding:10px 12px;border:1px solid var(--line3);border-radius:12px;font-size:12.5px;line-height:1.75;resize:vertical}
.rl-draft-group{margin-bottom:12px}
.rl-draft-group-head{font-size:12.5px;font-weight:800;color:var(--pri-d);margin:6px 0}
.rl-progress{margin-top:10px;padding:10px 12px;border-radius:13px;background:var(--pri-l)}

.rl-scope{max-height:320px;border:1px solid var(--line);border-radius:14px;padding:8px 10px;background:#fbfcfe}
.rl-scope-sec{padding:8px 4px;border-bottom:1px dashed var(--line)}
.rl-scope-sec:last-child{border-bottom:0}
.rl-scope-sec-head{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:13.5px}
.rl-scope-mods{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 2px 22px}
.rl-scope-mod{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;
  background:#eef2f8;border:1px solid var(--line);font-size:12px;cursor:pointer;color:var(--sub)}
.rl-scope-mod i{font-style:normal;font-size:10.5px;color:var(--sub2)}
.rl-scope-mod.on{background:var(--pri-l);border-color:var(--pri);color:var(--pri-d);font-weight:600}
.rl-scope-mod.warn{background:var(--warn-l);border-color:rgba(217,119,6,.35)}
.rl-scope-mod.warn.on{background:#ffe9cc;border-color:var(--warn);color:#8a5103}

.rl-tcard{border:1px solid var(--line);border-radius:14px;padding:10px 12px;background:#fbfcfe}
.rl-tcard-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.rl-topic{padding:10px 12px;border-radius:13px;background:var(--card);border:1px solid var(--line);min-width:150px;display:flex;flex-direction:column;gap:2px}
.rl-fileview{max-height:460px;overflow:auto;border:1px solid var(--line);border-radius:14px;background:#f4f6fa;padding:8px}
.rl-fileview img{max-width:100%;display:block;margin:0 auto}
.rl-fileview video{width:100%;max-height:420px;border-radius:10px}
.rl-fileview iframe{width:100%;height:440px;border:0;border-radius:10px;background:#fff}
.rl-fileview .pv-fallback{display:flex;flex-direction:column;align-items:center;gap:8px;padding:30px 16px;text-align:center;color:var(--sub)}
.rl-fileview .pv-fallback .big{font-size:34px}
@media (max-width:900px){
  .rl-filter input{min-width:120px}
  .rl-draft-title{min-width:120px}
}

/* 功能键行（管理员端资源库/题库页顶部）：所有功能键背景统一 */
.rl-fnbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.rl-fn{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:13px;
  background:var(--pri-soft);border:1px solid var(--line);color:var(--pri-d);
  font-size:13px;font-weight:600;white-space:nowrap;transition:.18s}
.rl-fn:hover{transform:translateY(-1px);box-shadow:var(--shadow);border-color:rgba(59,108,255,.35)}
.rl-fn.on{background:var(--pri-g);color:#fff;border-color:transparent;box-shadow:var(--shadow-glow)}
.rl-fn.on:hover{transform:none}