/* ===== 赣州工业职业中等专业学校 · 智慧教学系统 样式 ===== */
:root {
  --primary: #2f6bff;
  --primary-dark: #1d4ed8;
  --primary-light: #e8f0ff;
  --accent: #14b8a6;
  --bg: #f4f6fb;
  --panel: #ffffff;
  --text: #1f2733;
  --text-2: #5b6675;
  --text-3: #93a0b3;
  --border: #e6eaf2;
  --success: #16a34a;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(31, 45, 80, 0.08);
  --sidebar-w: 232px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.boot { display: flex; height: 100dvh; align-items: center; justify-content: center; color: var(--text-3); }

/* ---------- 通用组件 ---------- */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}
.card-title { font-size: 15px; font-weight: 700; display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.card-title .bar { width: 4px; height: 16px; background: var(--primary); border-radius: 2px; }
.grid { display: grid; gap: 16px; }
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.spread { display: flex; align-items: center; justify-content: space-between; }
.muted { color: var(--text-3); }
.center { text-align: center; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); background: #fff; color: var(--text);
  padding: 8px 16px; border-radius: 8px; font-size: 14px; transition: .15s;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--primary); }
.btn-danger { color: var(--danger); border-color: #f3c2c2; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.input, select.input, textarea.input {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; background: #fff; color: var(--text); outline: none;
}
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
label.field { display: block; margin-bottom: 14px; }
label.field > span { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; }

.tag { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.tag-green { background: #e7f7ec; color: var(--success); }
.tag-blue { background: var(--primary-light); color: var(--primary-dark); }
.tag-amber { background: #fef3da; color: #b4710a; }
.tag-red { background: #fdeaea; color: var(--danger); }
.tag-gray { background: #eef1f6; color: var(--text-2); }

/* 表格 */
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th, .table td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { color: var(--text-2); font-weight: 600; background: #fafbfe; position: sticky; top: 0; }
.table tbody tr:hover { background: #f7f9ff; }
.table-wrap { overflow: auto; border-radius: var(--radius); }

/* 进度条 */
.progress { height: 8px; background: #eef1f6; border-radius: 999px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 999px; }

/* ---------- 落地页 / Welcome ---------- */
.welcome { min-height: 100dvh; background: linear-gradient(135deg, #0f2c66 0%, #1d4ed8 55%, #2f6bff 100%); color: #fff; }
.welcome nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 40px; position: sticky; top: 0; backdrop-filter: blur(8px);
  background: rgba(15, 44, 102, 0.6); z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 18px; }
.brand .logo {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, #5b9bff, #14b8a6); font-size: 20px;
}
.welcome nav a.link { color: #dbe6ff; margin-left: 22px; font-size: 14px; }
.welcome nav a.link:hover { color: #fff; }
.hero { text-align: center; padding: 70px 20px 50px; }
.hero h1 { font-size: 40px; font-weight: 800; letter-spacing: 1px; }
.hero p.sub { font-size: 17px; color: #c9d8ff; margin-top: 16px; }
.hero .actions { margin-top: 30px; display: flex; gap: 14px; justify-content: center; }
.hero .btn-light { background: #fff; color: var(--primary-dark); border: none; padding: 12px 28px; font-size: 15px; font-weight: 700; }
.hero .btn-outline { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.6); padding: 12px 28px; font-size: 15px; }

.modules-showcase { max-width: 1100px; margin: 30px auto 60px; padding: 0 20px; }
.modules-showcase h2 { text-align: center; font-size: 26px; margin-bottom: 6px; }
.modules-showcase .lead { text-align: center; color: #c9d8ff; margin-bottom: 30px; }
.module-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.module-card {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius); padding: 22px; backdrop-filter: blur(6px);
}
.module-card .ic { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; background: rgba(255,255,255,.16); margin-bottom: 12px; }
.module-card h3 { font-size: 17px; margin-bottom: 6px; }
.module-card p { color: #d3e0ff; font-size: 13.5px; }
.welcome footer { text-align: center; padding: 26px; color: #9fb3e6; font-size: 13px; border-top: 1px solid rgba(255,255,255,.12); }

/* ---------- 登录 ---------- */
.auth-wrap { min-height: 100dvh; display: grid; grid-template-columns: 1.1fr 1fr; }
.auth-banner {
  background: linear-gradient(135deg, #0f2c66, #2f6bff); color: #fff;
  display: flex; flex-direction: column; justify-content: center; padding: 60px;
}
.auth-banner h2 { font-size: 30px; margin-bottom: 14px; }
.auth-banner ul { list-style: none; margin-top: 22px; }
.auth-banner li { margin: 12px 0; display: flex; gap: 10px; align-items: center; color: #d6e2ff; }
.auth-banner li .dot { width: 8px; height: 8px; border-radius: 50%; background: #5bffc2; }
.auth-form { display: flex; align-items: center; justify-content: center; padding: 40px; }
.auth-form .box { width: 360px; max-width: 100%; }
.auth-form h1 { font-size: 24px; margin-bottom: 6px; }
.auth-form .desc { color: var(--text-3); margin-bottom: 26px; }
.demo-accounts { margin-top: 18px; background: var(--primary-light); border-radius: 10px; padding: 12px 14px; font-size: 13px; color: var(--primary-dark); }
.demo-accounts b { cursor: pointer; }

/* ---------- 应用框架 ---------- */
.shell { display: flex; min-height: 100dvh; }
.sidebar {
  width: var(--sidebar-w); flex: 0 0 var(--sidebar-w);
  background: #0f1f3d; color: #cdd8ee; display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100dvh;
}
.sidebar .logo-bar { display: flex; align-items: center; gap: 10px; padding: 18px 18px; color: #fff; font-weight: 800; border-bottom: 1px solid rgba(255,255,255,.08); }
.sidebar .logo-bar .logo { width: 34px; height: 34px; border-radius: 9px; background: linear-gradient(135deg,#5b9bff,#14b8a6); display: grid; place-items: center; font-size: 18px; }
.sidebar nav { padding: 12px 10px; overflow-y: auto; flex: 1; }
.nav-group-title { font-size: 12px; color: #6f80a3; padding: 14px 12px 6px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px;
  color: #cdd8ee; cursor: pointer; margin-bottom: 2px; transition: .15s; font-size: 14px;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; font-weight: 600; }
.nav-item .ic { font-size: 16px; width: 20px; text-align: center; }
.sidebar .foot { padding: 12px; border-top: 1px solid rgba(255,255,255,.08); font-size: 12px; color: #6f80a3; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 60px; background: #fff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; padding: 0 24px; position: sticky; top: 0; z-index: 5;
}
.topbar .crumb { font-size: 15px; font-weight: 700; }
.topbar .crumb small { color: var(--text-3); font-weight: 400; margin-left: 8px; }
.topbar .userbox { display: flex; align-items: center; gap: 10px; position: relative; }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: 700; }
.user-menu { position: absolute; right: 0; top: 48px; background: #fff; border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); width: 160px; overflow: hidden; display: none; }
.user-menu.open { display: block; }
.user-menu button { width: 100%; text-align: left; padding: 10px 14px; border: none; background: #fff; font-size: 14px; }
.user-menu button:hover { background: #f5f7fb; }

.content { padding: 22px 24px 40px; }

/* 统计卡片 */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; }
.stat {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 14px;
}
.stat .ic { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; }
.stat .v { font-size: 26px; font-weight: 800; line-height: 1.1; }
.stat .l { color: var(--text-3); font-size: 13px; }
.tone-blue { background: var(--primary-light); color: var(--primary-dark); }
.tone-teal { background: #d7f6f0; color: #0f9b86; }
.tone-amber { background: #fef3da; color: #b4710a; }
.tone-rose { background: #fde7ec; color: #d6336c; }

.section-title { font-size: 16px; font-weight: 800; margin: 26px 0 14px; display: flex; align-items: center; gap: 8px; }
.section-title::before { content: ''; width: 4px; height: 18px; background: var(--primary); border-radius: 2px; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.toolbar .grow { flex: 1; }
.chart-box { width: 100%; }
.split-2 { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; }
.split-2b { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* 图表 */
.chart-svg { width: 100%; height: auto; display: block; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 10px; font-size: 12.5px; color: var(--text-2); }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; margin-right: 5px; }

/* 雷达 */
.radar-center { font-size: 13px; fill: var(--text-2); }

/* 模态框 */
.modal-mask { position: fixed; inset: 0; background: rgba(15,25,45,.45); display: grid; place-items: center; z-index: 100; padding: 20px; }
.modal { background: #fff; border-radius: 14px; width: 560px; max-width: 100%; max-height: 88dvh; overflow: auto; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.modal-head { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 16px; display: flex; justify-content: space-between; align-items: center; }
.modal-body { padding: 20px; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }
.x { cursor: pointer; color: var(--text-3); font-size: 20px; line-height: 1; }

/* Toast */
#toast-container { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); z-index: 200; display: flex; flex-direction: column; gap: 10px; }
.toast { background: #1f2733; color: #fff; padding: 11px 20px; border-radius: 10px; font-size: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.2); animation: pop .2s; }
.toast.ok { background: #16a34a; }
.toast.err { background: #ef4444; }
@keyframes pop { from { opacity: 0; transform: translateY(-8px); } }

/* 明细行 */
.qrow { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; margin-bottom: 10px; }
.qrow .meta { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-2); }

/* 响应式 */
@media (max-width: 980px) {
  .auth-wrap { grid-template-columns: 1fr; }
  .auth-banner { display: none; }
  .split-2, .split-2b { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .sidebar { position: fixed; left: 0; top: 0; z-index: 50; transform: translateX(-100%); transition: .2s; }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: inline-grid !important; }
  .topbar .crumb { font-size: 14px; }
}
.menu-toggle { display: none; background: none; border: none; font-size: 22px; margin-right: 10px; }

/* 新建作业 · 题目编辑器 */
.qb-head { background: #f1f5fb; border: 1px solid #e2e8f0; border-radius: 10px; padding: 12px 14px; margin-top: 12px; }
.q-list { margin-top: 10px; display: flex; flex-direction: column; gap: 12px; }
.q-card { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; background: #fafbfc; }
.q-card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.q-type { font-size: 12px; padding: 2px 8px; border-radius: 6px; }
.tag-purple { background: #f3e8ff; color: #7e22ce; }
.opt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 6px; }
.opt-row { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.opt-row input[type=radio] { margin: 0; }
.opt-preview { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
.opt-preview .opt-correct { font-weight: 700; color: var(--success); }
.opt-preview .opt-correct::after { content: ' ✓'; }

/* 模块关联性 · 数据闭环 */
.flow { display: flex; align-items: stretch; gap: 6px; flex-wrap: wrap; margin: 6px 0 14px; }
.flow-node { flex: 1; min-width: 130px; border: 1px solid var(--border); border-radius: 12px; padding: 14px; display: flex; flex-direction: column; gap: 4px; background: #fff; }
.flow-node small { color: var(--text-3); font-size: 12px; }
.flow-node.tone-blue { border-color: #bfdbfe; background: #eff6ff; }
.flow-node.tone-teal { border-color: #99f6e4; background: #f0fdfa; }
.flow-node.tone-rose { border-color: #fecdd3; background: #fff1f2; }
.flow-node.tone-amber { border-color: #fde68a; background: #fffbeb; }
.flow-arrow { align-self: center; color: var(--text-3); font-size: 20px; font-weight: 700; }
.flow-desc { padding-left: 18px; color: var(--text-2); line-height: 2; font-size: 13px; }
.flow-desc b { color: var(--text-1); }

/* ===== 细节打磨 ===== */
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary:focus-visible { outline-color: #fff; }
.stat:hover { transform: translateY(-2px); transition: .15s; box-shadow: 0 10px 30px rgba(31,45,80,.12); }
.card { transition: box-shadow .15s; }
.user-menu button { border-bottom: 1px solid var(--border); }
.user-menu button:last-child { border-bottom: none; }
.user-menu button:hover { background: #f5f7fb; color: var(--primary); }
.table tbody tr:last-child td { border-bottom: none; }
.q-card .field { margin-bottom: 10px; }
.opt-row input[type=radio] { accent-color: var(--primary); }
.tag-purple { background: #f3e8ff; color: #7e22ce; }
/* 生成复习作业按钮强调 */
#genReview { background: linear-gradient(135deg, #7c3aed, #14b8a6); border: none; color: #fff; font-weight: 600; }
#genReview:hover { filter: brightness(1.05); color: #fff; }