:root{
  --arm-navy:#0b1f3a; --arm-deep:#0a1830; --arm-sky:#38bdf8;
  --arm-blue:#2563eb; --arm-bg:#f4f7fb; --arm-text:#1f2937;
  --arm-muted:#6b7280; --arm-border:#e5e7eb; --arm-white:#fff;
  --radius:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--arm-bg);color:var(--arm-text);line-height:1.6}
/* 顶栏 */
.topbar{background:linear-gradient(135deg,var(--arm-deep),var(--arm-navy));color:#fff;display:flex;justify-content:space-between;align-items:center;padding:14px 28px;box-shadow:0 2px 12px rgba(0,0,0,.15)}
.brand{font-size:19px;font-weight:700;letter-spacing:.5px}
.brand .ver{font-size:12px;background:var(--arm-sky);color:var(--arm-navy);border-radius:4px;padding:2px 6px;margin-left:6px;font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px}
.user-info{font-size:14px;opacity:.9}
/* 返回主站 */
.back-home{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:600;color:#fff;text-decoration:none;padding:6px 12px;border:1px solid rgba(255,255,255,.45);border-radius:6px;transition:.2s;white-space:nowrap}
.back-home:hover{background:rgba(255,255,255,.14)}
/* 按钮 */
.btn{border:none;border-radius:6px;padding:9px 16px;font-size:14px;cursor:pointer;transition:.2s;font-weight:600}
.btn-primary{background:var(--arm-blue);color:#fff}
.btn-primary:hover{background:#1d4ed8}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
/* 浅色内容视图内的返回按钮：深色文字+蓝色边框，避免白字隐形于浅底 */
.view > p > .btn-ghost, .view .btn-ghost.back{background:var(--arm-white);border:1px solid var(--arm-blue);color:var(--arm-blue)}
.view > p > .btn-ghost:hover, .view .btn-ghost.back:hover{background:var(--arm-blue);color:#fff}
.btn-block{width:100%;margin-top:8px}
/* 容器 */
.container{max-width:1080px;margin:24px auto;padding:0 18px}
.view{animation:fade .3s}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1}}
/* 卡片 */
.card{background:var(--arm-white);border-radius:var(--radius);padding:24px;box-shadow:0 1px 6px rgba(0,0,0,.06);margin-bottom:24px}
.auth-card{max-width:400px;margin:40px auto}
.auth-card h2{text-align:center;margin-bottom:16px;color:var(--arm-navy)}
.tabs{display:flex;margin-bottom:16px;background:#eef2f7;border-radius:8px;padding:4px}
.tab{flex:1;padding:8px;border:none;background:transparent;border-radius:6px;cursor:pointer;font-weight:600;color:var(--arm-muted)}
.tab.active{background:#fff;color:var(--arm-blue);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.auth-form input,.auth-form select{width:100%;padding:11px;margin-bottom:12px;border:1px solid var(--arm-border);border-radius:6px;font-size:14px}
.msg{font-size:13px;margin-top:6px;min-height:18px}
.msg.ok{color:#16a34a}.msg.err{color:#dc2626}
/* 找回密码 */
.auth-links{text-align:right;margin-top:4px}
.auth-links .link,.link{color:var(--arm-blue);cursor:pointer;font-size:13px;text-decoration:underline}
.link:hover{opacity:.8}
.form-title{text-align:center;margin-bottom:12px;color:var(--arm-navy)}
.code-row{display:flex;gap:8px;align-items:stretch}
.code-row input{flex:1}
.code-row .btn-ghost{white-space:nowrap;padding:0 12px;font-size:13px;background:var(--arm-blue);color:#fff;border:none;border-radius:6px;cursor:pointer}
.code-row .btn-ghost:disabled{opacity:.6;cursor:not-allowed}
/* hero */
.hero{background:linear-gradient(135deg,var(--arm-navy),#1e3a8a);color:#fff;border-radius:var(--radius);padding:36px;margin-bottom:26px}
.hero h1{font-size:26px;margin-bottom:10px}
.hero p{opacity:.85;font-size:15px}
/* 课程库 hero 导航 */
.hero-nav{margin-top:18px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.btn-hero{background:var(--arm-sky);color:var(--arm-navy);border:none;border-radius:8px;padding:10px 22px;font-size:14px;font-weight:700;cursor:pointer;transition:.2s}
.btn-hero:hover{background:#0ea5e9;color:#fff}
.coin-badge{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.35);color:#fff;border-radius:20px;padding:8px 16px;font-size:14px;cursor:pointer;transition:.2s}
.coin-badge:hover{background:rgba(255,255,255,.2)}
.coin-num{color:#fbbf24;font-weight:700;font-size:16px}
/* 课程网格/卡片 */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.course-card{background:#fff;border:1px solid var(--arm-border);border-radius:var(--radius);padding:16px;transition:.2s;cursor:pointer;display:flex;flex-direction:column;gap:8px}
.course-card:hover{box-shadow:0 6px 20px rgba(37,99,235,.15);transform:translateY(-3px);border-color:var(--arm-sky)}
.course-card h4{color:var(--arm-navy);font-size:16px;line-height:1.4}
.cc-head{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.stage-tag{background:#eff6ff;color:#1d4ed8;border-radius:4px;padding:2px 8px;font-size:12px;font-weight:600}
.owned-tag{background:#dcfce7;color:#16a34a;border-radius:4px;padding:2px 8px;font-size:12px;font-weight:600}
.price-tag{background:#0b1f3a;color:#fbbf24;border-radius:4px;padding:2px 8px;font-size:12px;font-weight:700;margin-left:auto}
.price-tag.free{background:#dcfce7;color:#16a34a}
.cc-sub{color:var(--arm-muted);font-size:13px}
.cc-sum{color:var(--arm-muted);font-size:13px}
/* 课程详情锁 */
.lock-box{text-align:center;padding:30px 20px;border:1px dashed var(--arm-border);border-radius:var(--radius);background:#f8fafc;margin-top:10px}
.lock-icon{font-size:42px;margin-bottom:8px}
.lock-tip{margin-bottom:16px;color:var(--arm-navy);font-size:16px}
.course-content{line-height:1.8;margin-top:14px;color:var(--arm-text)}
.course-content h3{color:var(--arm-navy);margin:16px 0 8px;border-left:4px solid var(--arm-sky);padding-left:10px}
.course-content p{margin-bottom:8px}
/* 充值计划 */
.recharge-plans{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:18px 0}
.plan-card{background:#fff;border:1px solid var(--arm-border);border-radius:var(--radius);padding:16px;cursor:pointer;transition:.2s;text-align:center}
.plan-card:hover{border-color:var(--arm-sky);box-shadow:0 4px 14px rgba(37,99,235,.15);transform:translateY(-2px)}
.plan-main{font-size:22px;font-weight:700;color:var(--arm-navy)}
.plan-sub{font-size:13px;color:var(--arm-muted);margin-top:4px}
.plan-sub b{color:#f59e0b}
.note{font-size:12px;color:var(--arm-muted);margin-top:10px}
/* 管理表单 */
.cr-row{display:flex;align-items:flex-start;gap:10px;margin-bottom:10px}
.cr-row label{min-width:110px;font-size:14px;color:var(--arm-navy);font-weight:600;padding-top:9px}
.cr-row input,.cr-row select,.cr-row textarea{flex:1;padding:9px;border:1px solid var(--arm-border);border-radius:6px;font-size:14px;font-family:inherit}
.cr-row textarea{resize:vertical}
/* section */
.section{margin-bottom:26px}
.section h3{font-size:18px;margin-bottom:14px;color:var(--arm-navy);border-left:4px solid var(--arm-sky);padding-left:10px}
/* 主题网格 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.theme-card{background:#fff;border:1px solid var(--arm-border);border-radius:var(--radius);padding:16px;transition:.2s;cursor:pointer}
.theme-card:hover{box-shadow:0 4px 16px rgba(37,99,235,.15);transform:translateY(-2px);border-color:var(--arm-sky)}
.theme-card h4{color:var(--arm-navy);margin-bottom:6px}
.theme-card .fusion{font-size:12px;color:var(--arm-muted);margin-bottom:4px}
.theme-card .ex{font-size:12px;color:var(--arm-sky);font-weight:600}
.theme-card .range{font-size:12px;color:var(--arm-muted)}
/* 表单行 */
.form-row{display:flex;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.form-row select,.form-row input{flex:1;min-width:120px;padding:10px;border:1px solid var(--arm-border);border-radius:6px;font-size:14px}
/* 结果 */
.result{margin-top:12px;background:#f8fafc;border-radius:8px;padding:14px;max-height:400px;overflow:auto;border:1px dashed var(--arm-border)}
.result pre{white-space:pre-wrap;font-size:13px}
/* 任务列表 */
.tasks .task-item{background:#fff;border:1px solid var(--arm-border);border-radius:8px;padding:14px;margin-bottom:10px;display:flex;justify-content:space-between;align-items:center}
.task-item .t-title{font-weight:600;color:var(--arm-navy)}
.task-item .t-meta{font-size:12px;color:var(--arm-muted)}
.task-item .status{padding:3px 10px;border-radius:12px;font-size:12px;font-weight:600}
.status.active{background:#dbeafe;color:#1d4ed8}.status.draft{background:#f3f4f6;color:#6b7280}.status.completed{background:#dcfce7;color:#16a34a}
/* 步骤 */
.steps .step{background:#fff;border:1px solid var(--arm-border);border-left:4px solid var(--arm-sky);border-radius:8px;padding:14px;margin-bottom:12px}
.step .s-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.step .s-name{font-weight:700;color:var(--arm-navy)}
.step .s-guide{font-size:13px;color:var(--arm-muted);margin-bottom:8px}
.step textarea{width:100%;min-height:70px;padding:10px;border:1px solid var(--arm-border);border-radius:6px;font-size:13px;resize:vertical}
.step .saved{font-size:12px;color:#16a34a;margin-left:8px}
/* 评价板 */
.assess .dim{display:flex;justify-content:space-between;background:#f8fafc;padding:10px 14px;border-radius:6px;margin-bottom:8px;font-size:14px}
.dim .score{font-weight:700;color:var(--arm-navy)}
.muted{color:var(--arm-muted);font-size:13px}
.footer{text-align:center;padding:22px;color:var(--arm-muted);font-size:13px}
.task-context{background:#eff6ff;border-radius:8px;padding:14px;margin-bottom:16px}
.task-context .qc{font-weight:600;color:var(--arm-blue);margin-bottom:6px}
.task-context ul{margin-left:18px;font-size:13px}
.sh-save{background:var(--arm-navy);color:#fff;border:none;border-radius:4px;padding:4px 10px;cursor:pointer;font-size:12px}
.sh-save:hover{background:var(--arm-blue)}
/* ===== 移动端适配 ===== */
@media (max-width: 640px){
  .topbar{flex-wrap:wrap;gap:8px;padding:10px 14px}
  .topbar .brand{flex:1 1 100%;margin-bottom:4px}
  .nav-right{width:100%;justify-content:flex-end;flex-wrap:wrap}
  .back-home{font-size:13px;padding:5px 10px}
  .nav-right .btn{padding:7px 12px;font-size:13px}
  .hero{padding:24px 16px}
  .hero h1{font-size:21px}
  .hero-nav{flex-direction:column;align-items:stretch}
  .hero-nav .btn-hero,.hero-nav .coin-badge{width:100%;text-align:center;justify-content:center}
  .cr-row{flex-direction:column;gap:4px}
  .cr-row label{min-width:auto;padding-top:2px}
  .course-grid{grid-template-columns:1fr}
}

/* ===== 学校包管理（v10.4 分层定价 · 按校授权）===== */
.sp-item{border:1px solid #e5e7eb;border-radius:10px;padding:12px 14px;margin-bottom:10px;background:#fbfdff}
.sp-hd{font-size:14px;margin-bottom:6px;display:flex;flex-wrap:wrap;gap:8px;align-items:baseline}
.sp-hd .muted{font-size:12px;color:#6b7280;font-weight:400}
.sp-bd{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:12.5px}
.sp-badge{display:inline-block;font-size:11.5px;padding:2px 9px;border-radius:999px;background:#eef2f7;color:#374151;border:1px solid #e2e8f0}
.sp-badge.ok{background:#ecfdf5;color:#047857;border-color:#a7f3d0}
.sp-badge.off{background:#f3f4f6;color:#9ca3af;border-color:#e5e7eb}
.sp-badge.warn{background:#fffbeb;color:#b45309;border-color:#fcd34d}
.sp-act{margin-top:8px}
.sp-act .btn{padding:5px 12px;font-size:12.5px}