/**
 * 广州大学附属中学教育集团学情数据看板 — 全局样式
 * 无 Emoji；企业级简洁布局；广附红主色；大圆角卡片与表单（设计顾问 + 成熟组件观感）
 */

/* ========== 一、CSS变量 ========== */
:root {
  --primary: #7f1d1d;
  --primary-dark: #5c1010;
  --primary-light: #f9eded;
  --primary-muted: rgba(127, 29, 29, 0.07);
  --gold: #a16207;
  --success: #047857;
  --warning: #b45309;
  --error: #b91c1c;
  --bg: #ffffff;
  --bg-subtle: #ffffff;
  --surface: #ffffff;
  --surface-warm: #ffffff;
  --white: #ffffff;
  --border: #e8e4df;
  --border-strong: #d6d0c8;
  --text-primary: #1c1917;
  --text-secondary: #57534e;
  --text-light: #a8a29e;
  --shadow-sm: 0 1px 2px rgba(28, 25, 23, 0.05);
  --shadow-md: 0 6px 20px rgba(28, 25, 23, 0.07);
  --shadow-lg: 0 22px 56px rgba(28, 25, 23, 0.14);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-2xl: 28px;
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --dur-fast: 0.15s;
  --sidebar-width: 248px;
  --header-height: 64px;
}

/* ========== 二、全局重置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

body.page-cockpit,
body.page-diagnosis,
body.page-student-detail {
  background: var(--bg);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

a:hover {
  text-decoration: underline;
  color: var(--primary-dark);
}

/* 键盘导航：焦点可见（偏执型设计顾问 · 交互反馈） */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
  outline: none;
}

/* ========== 三、登录页样式 ========== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  position: relative;
  background: radial-gradient(120% 80% at 50% 0%, #9f2929 0%, #6b1414 42%, #3f0d0d 100%);
}

.login-page::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(255, 255, 255, 0.04) 59px,
      rgba(255, 255, 255, 0.04) 60px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 59px,
      rgba(255, 255, 255, 0.04) 59px,
      rgba(255, 255, 255, 0.04) 60px
    );
}

.login-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  padding: 40px 36px 32px;
  text-align: center;
  background: var(--surface);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: var(--shadow-lg);
}

.login-card--elevated {
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(127, 29, 29, 0.06);
}

.login-header {
  margin-bottom: 40px;
}

.login-logo {
  text-align: center;
  font-size: clamp(20px, 4vw, 22px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary);
  line-height: 1.35;
  max-width: 100%;
}

.login-tagline {
  margin-top: 10px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.login-field {
  text-align: left;
}

.login-page .input {
  padding: 13px 16px;
  font-size: 15px;
  border-radius: var(--radius-md);
}

.login-submit {
  width: 100%;
  height: 50px;
  margin-top: 8px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: normal;
}

.login-hint {
  margin-top: 28px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.login-copyright {
  text-align: center;
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.login-file-warn {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid #fecaca;
  background: #fef2f2;
  color: #991b1b;
  font-size: 13px;
  line-height: 1.55;
  text-align: left;
}

.login-file-warn strong {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
}

.login-file-warn p {
  margin: 0 0 8px;
}

.login-file-warn p:last-child {
  margin-bottom: 0;
}

.login-file-warn code {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.7);
  padding: 1px 4px;
  border-radius: 4px;
}

.login-footer {
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
}

/* ========== 四、Dashboard布局 ========== */
.dashboard-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary) 0%, rgba(127, 29, 29, 0.15) 55%, transparent 100%);
  pointer-events: none;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1 1 auto;
  min-width: 0;
  flex-wrap: wrap;
}

.header-center,
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.header-school-identity {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.header-school-logo {
  height: 36px;
  width: auto;
  max-width: 100px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 4px;
}

.header-center {
  flex: 1 1 auto;
  justify-content: center;
  min-width: 0;
}

.header-right {
  justify-content: flex-end;
}

.header-brand {
  color: var(--primary);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  max-width: min(520px, 46vw);
}

.header-sep {
  width: 1px;
  height: 24px;
  background: var(--border);
  flex-shrink: 0;
}

.header-title {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}

.header-date-range {
  display: inline-flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 6px;
  margin-left: 4px;
  padding: 4px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  flex-shrink: 0;
}

.header-date-range .page-date-range__label {
  font-size: 12px;
  color: var(--text-secondary);
}

.header-date-range .page-date-range__input {
  min-width: 118px;
  height: 30px;
  padding: 2px 8px;
  font-size: 12px;
  margin: 0;
}

.header-date-range .page-date-range__sep {
  font-size: 12px;
}

.header-date-range .page-date-range__hint {
  display: none;
}

.header-date-range .btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

.header-school {
  font-size: 16px;
  font-weight: 500;
}

.header-period {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(139, 26, 26, 0.12);
}

.sidebar {
  position: fixed;
  left: 0;
  top: var(--header-height);
  width: var(--sidebar-width);
  bottom: 0;
  padding: 16px 0 24px;
  background: var(--surface-warm);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  z-index: 90;
}

.main-content {
  margin-left: var(--sidebar-width);
  margin-top: var(--header-height);
  padding: 28px 28px 48px;
  min-height: calc(100vh - var(--header-height));
}

/* ========== 侧栏分组导航（校长 / 班主任角色区分） ========== */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav__group {
  margin-bottom: 12px;
}

.sidebar-nav__group:last-child {
  margin-bottom: 0;
}

.sidebar-nav__label {
  padding: 8px 20px 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
}

.sidebar-nav__hint {
  margin: 4px 16px 0;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--text-secondary);
  background: var(--primary-muted);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(127, 29, 29, 0.1);
}

/* ========== 五、侧边栏菜单 ========== */
.menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  margin: 3px 12px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
}

.menu-label {
  flex: 1;
  min-width: 0;
  line-height: 1.35;
}

.menu-icon {
  flex-shrink: 0;
  width: 1em;
  margin-right: 0;
  font-size: 16px;
  line-height: 1;
  text-align: center;
}

.menu-icon--abbr {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-muted);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(127, 29, 29, 0.12);
}

.menu-item.active .menu-icon--abbr {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--white);
}

.menu-item:hover {
  background: var(--primary-light);
  color: var(--primary);
  text-decoration: none;
}

.menu-item.active {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(127, 29, 29, 0.28);
}

.menu-item.active:hover {
  color: var(--white);
  background: var(--primary-dark);
}

/* ========== 六、通用卡片 ========== */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.card--module {
  border-top: 3px solid var(--primary);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

/* ========== 七、指标卡片 ========== */
.metric-card {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 22px 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  text-align: left;
  transition: box-shadow var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.metric-card:hover {
  border-color: rgba(127, 29, 29, 0.2);
  box-shadow: var(--shadow-md);
}

.metric-card--stat {
  padding: 22px 20px;
}

.metric-card--stat .metric-value {
  margin-top: 0;
}

.metric-card--highlight {
  border-color: rgba(127, 29, 29, 0.22);
  background: var(--surface);
  box-shadow: 0 4px 18px rgba(127, 29, 29, 0.08);
}

.metric-card--highlight::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: var(--primary);
}

.metric-card--highlight .metric-value {
  font-size: 34px;
}

.metric-icon {
  font-size: 20px;
  margin-bottom: 10px;
  line-height: 1;
  color: var(--text-secondary);
}

.metric-value {
  font-family: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Roboto, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--primary);
}

.metric-label {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.4;
}

.metric-value__unit {
  font-size: 14px;
  font-weight: 500;
}

.core-metrics-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  align-items: stretch;
}

.core-metrics-grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.page-cockpit .core-metrics-grid,
.page-diagnosis .core-metrics-grid {
  gap: 16px;
}

/* 概览指标：统一外观，取消仅个别卡片左侧色条/放大字号 */
.core-metrics-grid .metric-card--stat {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
  background: var(--surface);
}

.core-metrics-grid .metric-card--highlight {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
  background: var(--surface);
}

.core-metrics-grid .metric-card--highlight::before {
  display: none;
}

.core-metrics-grid .metric-card--highlight .metric-value {
  font-size: 32px;
  color: var(--primary);
}

.core-metrics-grid .metric-card--stat .metric-value {
  color: var(--primary);
}

.page-cockpit .grid-5 {
  gap: 14px;
}

/* ========== 八、标签 ========== */
.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
}

.tag-success {
  background: #ecfdf5;
  color: #047857;
}

.tag-good {
  background: #f0fdf4;
  color: #15803d;
}

.tag-warning {
  background: #fffbeb;
  color: #b45309;
}

.tag-error {
  background: #fef2f2;
  color: #b91c1c;
}

.tag-gray {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.tag-source--homework {
  background: #fce8e8;
  color: #7f1d1d;
}

.tag-source--self {
  background: #eff6ff;
  color: #1d4ed8;
}

/* ========== 九、表格 ========== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  background: var(--surface);
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

.data-table th:hover {
  background: var(--primary-light);
  color: var(--text-primary);
}

.data-table th .sort-icon {
  margin-left: 4px;
  font-size: 10px;
  color: var(--text-light);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

/* 表格内正文不要用全局链接色；仅姓名等链接使用主题色 */
.data-table td a {
  color: var(--primary);
  text-decoration: none;
}

.data-table td a:hover {
  text-decoration: underline;
}

.data-table tbody tr:hover {
  background: var(--primary-light);
}

/* ========== 十、按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out),
    transform 0.08s ease-out;
  text-decoration: none;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  box-shadow: 0 2px 10px rgba(139, 26, 26, 0.28);
}

.btn-primary:disabled {
  background: #d6d3d1;
  color: #a8a29e;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-outline {
  background: var(--surface);
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
}

.btn-sm {
  padding: 4px 12px;
  font-size: 12px;
  border-radius: 6px;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn-group .btn {
  padding: 4px 14px;
  font-size: 12px;
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-group .btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* ========== 十一、输入框和下拉框 ========== */
.input {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}

.input::placeholder {
  color: var(--text-light);
}

.input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139, 26, 26, 0.12);
}

.select {
  padding: 9px 14px;
  font-size: 14px;
  min-width: 160px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-primary);
  cursor: pointer;
  outline: none;
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}

.select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139, 26, 26, 0.1);
}

/* ========== 十二、筛选器 ========== */
.filter-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-bottom: 24px;
}

.filter-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 24px;
  padding: 14px 22px;
  background: var(--surface-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.filter-toolbar .filter-field {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.filter-toolbar .filter-field .filter-label {
  flex-shrink: 0;
  white-space: nowrap;
}

.filter-toolbar .filter-field .select,
.filter-toolbar .filter-field .input {
  min-width: 140px;
}

.filter-toolbar .filter-field--search .input {
  width: 220px;
  min-width: 160px;
}

.filter-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

/* ========== 十三、Tab ========== */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.tab {
  padding: 11px 18px;
  margin-bottom: -1px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
}

.tab:hover {
  color: var(--primary);
  background: rgba(139, 26, 26, 0.04);
}

.tab.active {
  font-weight: 600;
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: transparent;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-content[hidden] {
  display: none !important;
}

.tabs--pill {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 20px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.tabs--pill .tab {
  margin-bottom: 0;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  border-bottom: none;
  cursor: pointer;
  user-select: none;
}

.tabs--pill .tab:hover {
  background: var(--primary-muted);
  color: var(--primary);
}

.tabs--pill .tab.active {
  background: var(--primary);
  color: var(--white);
  border-bottom-color: transparent;
}

.tabs--pill .tab.active:hover {
  color: var(--white);
  background: var(--primary-dark);
}

/* ========== 十四、AI分析卡片 ========== */
.ai-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 28px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-sm);
}

.ai-card .ai-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: -4px 0 20px;
  padding-bottom: 16px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}

.ai-card .ai-section {
  margin-bottom: 16px;
}

.ai-card .ai-section-title {
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.ai-card .ai-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
}

.ai-card .highlight {
  color: var(--primary);
  font-weight: 700;
}

.ai-card .ai-warning {
  color: var(--error);
}

.ai-card .ai-suggestion {
  padding-left: 16px;
  color: var(--text-secondary);
}

.ai-card ul {
  margin: 4px 0;
  padding-left: 20px;
}

.ai-card li {
  margin-bottom: 4px;
  line-height: 1.8;
}

/* 驾驶舱：折线图数据点/面积层溢出到右侧卡片时，用裁剪消除右侧「圆点」视觉遮挡 */
.page-cockpit #dailyChart,
.page-cockpit #coverageChart,
.page-cockpit #classChart {
  overflow: hidden;
  position: relative;
  max-width: 100%;
}

/* 驾驶舱 AI：完整展示，避免列表/长句被裁切 */
.page-cockpit .ai-card {
  overflow: visible;
}

.page-cockpit .ai-card #aiAnalysis {
  overflow: visible;
  max-height: none;
  word-break: break-word;
}

.page-cockpit .ai-card #aiAnalysis .ai-text {
  overflow: visible;
  white-space: normal;
}

.page-cockpit .ai-card #aiAnalysis ul,
.page-cockpit .ai-card #aiAnalysis ol {
  list-style-position: outside;
  padding-left: 1.35em;
  margin: 8px 0 12px;
}

.page-student-detail .ai-card {
  overflow: visible;
}

.page-student-detail .ai-card #aiAnalysis {
  overflow: visible;
  max-height: none;
  word-break: break-word;
}

.page-student-detail .ai-card #aiAnalysis .ai-text {
  line-height: 1.7;
}

.page-diagnosis .ai-card {
  overflow: visible;
}

.page-diagnosis .ai-card #aiDiagnosis {
  overflow: visible;
  max-height: none;
  word-break: break-word;
}

.page-diagnosis .ai-card #aiDiagnosis .ai-text {
  overflow: visible;
  white-space: normal;
}

.page-diagnosis .ai-card #aiDiagnosis ul,
.page-diagnosis .ai-card #aiDiagnosis ol {
  list-style-position: outside;
  padding-left: 1.35em;
  margin: 8px 0 12px;
}

/* ========== 十五、日历热力图 ========== */
.calendar-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 4px;
}

.calendar-header-cell {
  padding: 4px 0;
  font-size: 12px;
  text-align: center;
  color: var(--text-light);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 36px;
  aspect-ratio: 1;
  margin: 0 auto;
  border-radius: 4px;
  font-size: 12px;
}

.calendar-active {
  background: var(--success);
  color: var(--white);
}

.calendar-inactive {
  background: #f3f4f6;
  color: var(--text-light);
}

.calendar-empty {
  background: transparent;
}

/* ========== 十六、知识图谱 ========== */
.knowledge-tree {
  /* 无特殊样式 */
}

.chapter-node {
  margin-bottom: 16px;
}

.chapter-title {
  margin-bottom: 8px;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 600;
  background: var(--bg);
  border-radius: 8px;
}

.knowledge-nodes {
  padding-left: 24px;
}

.knowledge-node {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
  padding: 8px 14px;
  border-left: 2px solid var(--border);
  transition: background-color 0.2s;
}

.knowledge-node:hover {
  background: var(--bg);
}

.knowledge-name {
  font-size: 14px;
}

/* ========== 十七、展开/收起 ========== */
.expand-btn {
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  cursor: pointer;
  user-select: none;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.expand-btn:hover {
  background: var(--primary-muted);
  text-decoration: none;
}

.sub-table-row {
  display: none;
}

.sub-table-row.show {
  display: table-row;
}

.question-num-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.question-num {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  border: none;
  padding: 0;
}

.question-num--right {
  background: #d1fae5;
  color: #065f46;
}

.question-num--wrong {
  background: #fee2e2;
  color: #991b1b;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}

.question-num--wrong:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(153, 27, 27, 0.18);
}

.sub-table {
  width: 100%;
  margin: 8px 0;
  font-size: 13px;
}

.sub-table td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
}

/* ========== 十八、分页 ========== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 16px;
}

.page-btn {
  padding: 6px 12px;
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background-color 0.2s;
}

.page-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

.page-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========== 十九、进度条 ========== */
.progress-bar {
  min-width: 60px;
  height: 6px;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
}

.progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* ========== 二十、面包屑 ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  padding: 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.page-student-detail .page-header--role {
  margin-bottom: 20px;
  padding-bottom: 16px;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease-out);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb .sep {
  color: var(--text-light);
  font-weight: 400;
}

/* ========== 二十一、学生信息卡片 ========== */
.student-info-card {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px 24px;
  margin-bottom: 24px;
  padding: 24px 28px;
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary);
}

.student-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.student-meta {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* ========== 二十二、网格布局 ========== */
.grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* ========== 二十三、间距工具类 ========== */
.mb-12 {
  margin-bottom: 12px;
}

.mb-16 {
  margin-bottom: 16px;
}

.mb-24 {
  margin-bottom: 24px;
}

.mt-16 {
  margin-top: 16px;
}

.mt-24 {
  margin-top: 24px;
}

/* ========== 二十四、页面标题 ========== */
.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.page-header--role {
  align-items: flex-start;
  margin-bottom: 24px;
  padding: 0 0 20px;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  border-bottom: 1px solid var(--border);
}

.page-header__eyebrow {
  margin-bottom: 10px;
}

.page-role-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 999px;
  border: 1px solid transparent;
}

.page-role-badge--principal {
  color: var(--primary-dark);
  background: var(--primary-light);
  border-color: rgba(127, 29, 29, 0.15);
}

.page-role-badge--teacher {
  color: #6b4c0a;
  background: #fffbeb;
  border-color: rgba(180, 83, 9, 0.2);
}

.page-module {
  margin-bottom: 28px;
}

.page-module__title {
  margin: 0 0 14px;
  padding-left: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  border-left: 3px solid var(--primary);
  line-height: 1.35;
}

.page-module__desc {
  margin: -8px 0 14px 15px;
  font-size: 13px;
  color: var(--text-secondary);
}

.path-hint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 4px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  font-size: 12px;
  color: var(--text-light);
}

.path-hint__step {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.path-hint__step::after {
  content: "›";
  margin-left: 4px;
  color: var(--border-strong);
  font-weight: 400;
}

.path-hint__step:last-child::after {
  content: none;
}

.path-hint__step--current {
  color: var(--primary);
  font-weight: 600;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.25;
  color: var(--text-primary);
}

.page-title-sub {
  margin-top: 6px;
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0;
}

.page-header--flush {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 16px;
}

.page-header__main {
  flex: 1;
  min-width: 0;
}

.page-header__title-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
}

.page-date-range {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.page-date-range__label {
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.page-date-range__input {
  min-width: 132px;
  margin: 0;
}

.page-date-range__sep {
  font-size: 13px;
  color: var(--text-secondary);
}

.page-date-range__hint {
  font-size: 11px;
  color: var(--text-light);
  white-space: nowrap;
}

/* ========== 二十五、正误标记 ========== */
.mark-correct {
  font-weight: 600;
  color: var(--success);
}

.mark-wrong {
  font-weight: 600;
  color: var(--error);
}

.card-header-aside {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.text-muted {
  color: var(--text-secondary);
  font-size: 14px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========== 班级管理（结构重塑 · 无 Emoji） ========== */
.main-content--board {
  max-width: 1280px;
}

.page-header--board {
  margin-bottom: 20px;
  padding-bottom: 0;
  border-bottom: none;
}

.page-header--board.page-header--role {
  margin-bottom: 24px;
}

.page-header--board .page-title {
  font-size: 24px;
  letter-spacing: -0.03em;
}

.page-header--board .page-title-sub {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 52em;
  line-height: 1.5;
}

.board-section {
  margin-bottom: 24px;
}

.board-section__heading {
  margin: 0 0 12px;
  padding-left: 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-primary);
  border-left: 3px solid var(--primary);
}

.board-toolbar {
  padding: 18px 22px;
  background: var(--surface-warm);
  border-color: var(--border);
}

.board-toolbar__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-bottom: 14px;
}

.board-toolbar__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.board-toolbar__fields {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.board-field .filter-label {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  white-space: nowrap;
}

.board-field {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.board-field .select {
  min-width: 140px;
}

/* 班级管理 · 指标区（主次分明） */
.board-zone {
  margin-bottom: 28px;
}

.board-zone--analysis {
  margin-bottom: 0;
}

.board-metrics-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 0.9fr) minmax(0, 1.2fr) minmax(0, 1.2fr);
  gap: 16px;
  align-items: stretch;
}

.board-metrics-layout--compact {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.overview-metric {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 0;
  padding: 18px 20px;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}

#coreMetrics.board-metrics-layout,
#hwCoreMetrics.board-metrics-layout {
  min-height: 0;
}

#coreMetrics .overview-metric,
#hwCoreMetrics .overview-metric {
  min-height: 120px;
}

.overview-metric:hover {
  box-shadow: var(--shadow-md);
}

.overview-metric--compact {
  padding: 16px 18px;
  background: var(--surface);
}

.overview-metric--hero {
  padding: 28px 20px 20px;
  border-width: 1px;
  border-left-width: 4px;
}

.overview-metric--ok {
  border-left-color: var(--success);
}

.overview-metric--warn {
  border-left-color: var(--warning);
}

.overview-metric--low {
  border-left-color: var(--error);
}

.overview-metric--neutral {
  border-left-color: var(--border-strong);
}

.overview-metric__top {
  position: absolute;
  top: 12px;
  right: 12px;
  left: auto;
  margin: 0;
  z-index: 1;
}

.overview-metric__status {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.overview-metric__status--ok {
  color: var(--success);
  background: #ecfdf5;
}

.overview-metric__status--warn {
  color: var(--warning);
  background: #fffbeb;
}

.overview-metric__status--low {
  color: var(--error);
  background: #fef2f2;
}

.overview-metric__value {
  width: 100%;
  font-family: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Roboto, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.overview-metric--hero .overview-metric__value {
  font-size: 36px;
  color: var(--primary);
}

.overview-metric__label {
  width: 100%;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.4;
}

.overview-metric__micro {
  width: 100%;
  height: 4px;
  margin-top: auto;
  align-self: stretch;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.overview-metric__micro-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
  transition: width 0.35s var(--ease-out);
}

.overview-metric__micro-fill--ok {
  background: var(--success);
}

.overview-metric__micro-fill--warn {
  background: var(--warning);
}

.overview-metric__micro-fill--low {
  background: var(--error);
}

.board-tabs {
  display: inline-flex;
  gap: 4px;
  margin-bottom: 20px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  border-bottom: none;
}

.board-tabs__btn {
  margin-bottom: 0;
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-sm);
  border-bottom: none;
  background: transparent;
  font-family: inherit;
}

.board-tabs__btn:hover {
  background: var(--primary-muted);
}

.board-tabs__btn.active {
  background: var(--primary);
  color: #fff;
  border-bottom-color: transparent;
}

.board-tabs__btn.active:hover {
  color: #fff;
  background: var(--primary-dark);
}

.board-panel {
  animation: board-fade-in 0.2s var(--ease-out);
}

@keyframes board-fade-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-desc {
  margin-top: 4px;
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
}

.card-header--stack {
  align-items: flex-start;
  margin-bottom: 12px;
}

/* 作业分析 Tab */
.homework-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 100%;
}

.hw-zone--data {
  margin: 0;
}

.hw-zone--hint[hidden] {
  display: none !important;
}

/* 试卷列表 */
.hw-paper-list {
  min-width: 0;
}

.hw-paper-list__table {
  overflow-x: auto;
}

.hw-paper-list__pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 16px;
}

.hw-paper-list__pager[hidden] {
  display: none !important;
}

.hw-paper-list__pager-info {
  font-size: 13px;
  color: var(--text-secondary);
}

.hw-paper-list__pager-btns {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hw-paper-list__pager-page {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
  min-width: 4.5em;
  text-align: center;
}

.page-diagnosis .hw-workspace.card {
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.hw-workspace__head {
  padding: 20px 24px 0;
}

.hw-workspace__title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hw-help-btn {
  width: 22px;
  height: 22px;
  padding: 0;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: help;
  font-family: inherit;
}

.hw-help-btn:hover {
  color: var(--primary);
  border-color: rgba(127, 29, 29, 0.25);
  background: var(--primary-muted);
}

.hw-filter-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 16px 24px 0;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
}

.hw-filter-row__title {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.hw-filter-row .filter-label {
  flex-shrink: 0;
  white-space: nowrap;
}

.hw-filter-row .hw-picker__sep {
  flex-shrink: 0;
}

.hw-filter-row .btn {
  flex-shrink: 0;
  margin-left: auto;
}

@media (max-width: 720px) {
  .hw-filter-row .btn {
    margin-left: 0;
    width: 100%;
  }
}

.hw-workspace__table-label {
  margin: 20px 24px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-light);
}

.card-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.card-header__search {
  width: 160px;
  min-width: 120px;
}

.hw-picker__filters {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
}

.hw-picker__date {
  min-width: 140px;
}

.hw-picker__sep {
  font-size: 13px;
  color: var(--text-light);
}

.hw-picker__table-zone {
  margin: 0 24px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
}

.hw-picker__list {
  overflow-x: auto;
}

.hw-table {
  width: 100%;
  min-width: 0;
  margin: 0;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 14px;
}

.hw-table col.hw-table__col-name {
  width: 34%;
}

.hw-table col.hw-table__col-subject {
  width: 7%;
}

.hw-table col.hw-table__col-scene {
  width: 12%;
}

.hw-table col.hw-table__col-participate {
  width: 24%;
}

.hw-table col.hw-table__col-rate {
  width: 10%;
}

.hw-table col.hw-table__col-action {
  width: 8%;
}

.hw-table th,
.hw-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

.hw-table thead th {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg);
  white-space: nowrap;
}

.hw-table tbody tr:last-child td {
  border-bottom: none;
}

.hw-table tbody tr {
  background: var(--surface);
}

.hw-table__row {
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out);
}

.hw-table__row:hover {
  background: var(--primary-muted);
}

.hw-table__row--selected {
  background: rgba(127, 29, 29, 0.06);
}

.hw-table__row--alert {
  background: var(--surface);
}

.hw-table__row--alert:hover {
  background: var(--primary-muted);
}

.hw-table__col-check {
  width: 44px;
  text-align: center;
}

.hw-table__col-date {
  width: 72px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
  font-size: 13px;
}

.hw-table__col-name {
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
}

.hw-table__col-subject {
  white-space: nowrap;
  text-align: center;
}

.hw-table__col-scene {
  white-space: nowrap;
}

.hw-table__col-participate {
  white-space: nowrap;
}

.hw-table__col-rate {
  white-space: nowrap;
  text-align: center;
}

.hw-table__col-action {
  text-align: center;
  white-space: nowrap;
}

/* 试卷详情页 */
.paper-detail {
  margin-bottom: 16px;
}

.paper-detail__card {
  margin-bottom: 0;
}

.paper-detail__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.paper-detail__title-wrap {
  flex: 1;
  min-width: 0;
}

.paper-detail__meta {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.paper-detail__body {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.paper-detail__section-title {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--text-primary);
}

.paper-detail__body .analysis-table-wrap:has(.high-freq-errors-table) {
  padding: 0;
}

.paper-detail__overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.paper-detail__stat {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  border: 1px solid var(--border);
}

.paper-detail__stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.paper-detail__stat-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.paper-detail__alert {
  margin-bottom: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: #fef2f2;
  font-size: 13px;
  color: var(--error);
}

.paper-detail__empty {
  padding: 24px;
  text-align: center;
  color: var(--text-light);
  font-size: 13px;
}

.hw-table__name {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tag-scene {
  display: inline;
  font-size: 13px;
  font-weight: 400;
  color: var(--text-primary);
  white-space: nowrap;
}

.tag-scene--exam,
.tag-scene--practice,
.tag-scene--video,
.tag-scene--other {
  color: var(--text-primary);
}

.hw-progress {
  height: 6px;
  margin-bottom: 6px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.hw-progress__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  transition: width 0.3s var(--ease-out);
}

.hw-progress__fill--ok {
  background: var(--success);
}

.hw-progress__fill--warn {
  background: var(--warning);
}

.hw-progress__fill--low {
  background: var(--error);
}

.hw-progress__text {
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.btn-text {
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
}

.btn-text:hover {
  background: var(--primary-muted);
  border-color: rgba(127, 29, 29, 0.15);
}

.hw-picker__pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin: 0 24px 20px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
}

.hw-picker__pager[hidden] {
  display: none !important;
}

.hw-picker__pager-info {
  font-size: 13px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.hw-picker__pager-btns {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.hw-picker__pager-page {
  min-width: 32px;
  padding: 4px 10px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  color: var(--text-secondary);
}

.hw-action-bar {
  position: sticky;
  bottom: 12px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(28, 25, 23, 0.12);
}

.hw-action-bar__left {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.hw-action-bar__count {
  font-size: 15px;
  color: var(--text-primary);
}

.hw-action-bar__count strong {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.hw-action-bar__hint {
  font-size: 12px;
  color: var(--text-light);
}

.hw-action-bar__btn {
  flex-shrink: 0;
  min-width: 160px;
  padding-left: 24px;
  padding-right: 24px;
}

.hw-action-bar--active {
  border-color: rgba(127, 29, 29, 0.35);
  box-shadow: 0 8px 32px rgba(127, 29, 29, 0.15);
}

.hw-action-bar--active .hw-action-bar__count strong {
  color: var(--primary-dark);
}

.homework-panel .hw-analysis {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.homework-panel .hw-analysis[hidden] {
  display: none !important;
}

.state-empty {
  padding: 56px 24px;
  text-align: center;
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-xl);
}

.state-empty--hint {
  padding: 36px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.state-empty--hint .state-empty__icon {
  display: none;
}

.state-empty__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 12px;
  background: var(--primary-muted);
  border: 1px solid rgba(127, 29, 29, 0.12);
}

.state-empty__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.state-empty__desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.state-empty__hint {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-light);
}

.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.tier-card {
  padding: 16px;
  border-radius: var(--radius-md);
  text-align: center;
}

.tier-card__count {
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.tier-card__label {
  margin-top: 4px;
  font-size: 12px;
  font-weight: 600;
}

.tier-card__names {
  margin-top: 8px;
  font-size: 11px;
  line-height: 1.5;
  word-break: break-all;
}

.tier-card--a {
  background: #ecfdf5;
  color: #047857;
}

.tier-card--b {
  background: #fffbeb;
  color: #b45309;
}

.tier-card--c {
  background: #fef2f2;
  color: #b91c1c;
}

.hw-resource {
  padding: 16px 18px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.hw-resource__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.hw-resource__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.hw-resource__meta {
  margin-left: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.hw-resource__actions {
  display: flex;
  gap: 8px;
}

.hw-resource__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 24px;
  font-size: 14px;
}

.hw-resource__detail {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.hw-resource__detail[hidden] {
  display: none;
}

.question-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.question-modal[hidden] {
  display: none;
}

.question-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
}

.question-modal__panel {
  position: relative;
  width: min(640px, 100%);
  max-height: min(80vh, 720px);
  overflow: auto;
  background: var(--surface, #fff);
  border-radius: 12px;
  box-shadow: 0 20px 48px rgba(15, 23, 42, 0.18);
}

.question-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.question-modal__title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.question-modal__close {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
}

.question-modal__close:hover {
  color: var(--text-primary);
}

.question-modal__body {
  padding: 20px;
}

.question-modal__meta {
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--text-secondary);
}

.question-modal__stem {
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
}

.question-modal__options {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.question-modal__option {
  padding: 10px 12px;
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.6;
}

.question-modal__option-label {
  font-weight: 600;
  margin-right: 4px;
}

.question-modal__answer,
.question-modal__analysis {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.7;
}

.question-modal__answer {
  background: #ecfdf5;
  color: #065f46;
}

.question-modal__analysis {
  background: #f8fafc;
  color: var(--text-secondary);
}

.question-modal__label {
  display: inline-block;
  margin-right: 8px;
  font-weight: 600;
  color: var(--text-primary);
}

body.question-modal-open {
  overflow: hidden;
}

.ai-card--insight .ai-title {
  margin-bottom: 0;
}

.chart-box {
  width: 100%;
  min-height: 200px;
  position: relative;
}

.chart-box--md {
  height: 260px;
  min-height: 260px;
}

.chart-box--sm {
  height: 240px;
  min-height: 240px;
}

.chart-box--subject-usage {
  min-height: 240px;
  height: auto;
}

.ss-overview .ss-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.ss-stat {
  padding: 16px;
  text-align: center;
  background: var(--bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.ss-stat__value {
  font-size: 28px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--primary);
  line-height: 1.2;
}

.ss-stat__label {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

.ss-alert {
  padding: 10px 12px;
  font-size: 13px;
  background: #fef2f2;
  border-radius: var(--radius-sm);
  border: 1px solid #fecaca;
}

.ss-alert strong {
  color: var(--error);
  font-weight: 600;
}

.msg-success {
  text-align: center;
  padding: 16px;
  color: var(--success);
  font-size: 14px;
}

/* ========== 学校驾驶舱（校长视角） ========== */
.page-cockpit .main-content {
  max-width: 1440px;
}

.page-cockpit #coreMetrics,
.page-cockpit #metricCards {
  margin-bottom: 8px;
}

.page-cockpit #mainTabs.board-tabs {
  margin-bottom: 20px;
  border-bottom: none;
}

.page-cockpit #homeworkPanel.tab-content.active,
.page-cockpit #selfStudyPanel.tab-content.active,
.page-cockpit #reportPanel.tab-content.active {
  display: block;
}

.page-cockpit .class-chart-scroll--active {
  max-height: 400px;
  box-sizing: border-box;
  padding-bottom: 12px;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.weak-kp-panel {
  align-items: stretch;
}

.weak-kp-panel .card--module {
  margin-bottom: 0;
}

.weak-kp-panel .weak-kp-cloud-card {
  display: flex;
  flex-direction: column;
}

/* ========== 学情分析 · 统一模块（驾驶舱 + 班级管理） ========== */
.page-cockpit .page-header--dashboard {
  margin-bottom: 20px;
  padding-bottom: 0;
  border-bottom: none;
}

.page-cockpit .page-header--dashboard .page-title {
  font-size: 24px;
  letter-spacing: -0.03em;
}

.board-zone--toolbar {
  margin-bottom: 24px;
}

.board-zone--toolbar .filter-toolbar {
  margin-bottom: 0;
}

.board-zone--analysis > .board-section__heading + .board-tabs {
  margin-top: 4px;
}

.learning-analysis {
  min-width: 0;
}

.analysis-grid {
  display: grid;
  gap: 16px;
}

.analysis-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.analysis-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.analysis-block:has(.chart-panel--md) {
  overflow: visible;
}

.analysis-block__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-warm);
}

.analysis-block__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.analysis-block__aside {
  margin: 0;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.analysis-block__aside[hidden] {
  display: none !important;
}

.analysis-block__body {
  padding: 16px 20px 20px;
}

.analysis-block__body--flush {
  padding: 0;
}

.analysis-block__body--table {
  padding: 0 0 4px;
}

.analysis-block__body--table .analysis-table-wrap {
  padding: 0 4px;
}

.chart-panel {
  width: 100%;
  box-sizing: border-box;
}

.chart-panel--md {
  height: 320px;
  min-height: 280px;
  overflow: visible;
}

.analysis-block__body .chart-panel--md {
  margin: 0 -4px;
}

.page-cockpit #ssTrendChart.chart-panel--md {
  margin: 0 auto;
}

.analysis-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: stretch;
}

.analysis-split__pane {
  min-width: 0;
  padding: 14px 16px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.analysis-split__pane--cloud {
  background: radial-gradient(
    ellipse 95% 90% at 50% 50%,
    var(--primary-light) 0%,
    var(--surface) 78%
  );
}

.analysis-split__label {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.analysis-split__pane--cloud .weak-kp-cloud-box {
  background: transparent;
  border-radius: var(--radius-sm);
}

.analysis-table-wrap {
  overflow-x: auto;
}

.analysis-table-wrap .data-table {
  margin: 0;
}

/* 高频错题 TOP10：固定列宽、内容居中、4px 间距节奏 */
.analysis-table-wrap:has(.high-freq-errors-table) {
  padding: 4px 20px 0;
}

.analysis-table-wrap .data-table.high-freq-errors-table {
  width: 100%;
  table-layout: fixed;
}

.high-freq-errors-table col.hf-col-rank {
  width: 8%;
}

.high-freq-errors-table col.hf-col-paper {
  width: 28%;
}

.high-freq-errors-table col.hf-col-question {
  width: 14%;
}

.high-freq-errors-table col.hf-col-subject {
  width: 12%;
}

.high-freq-errors-table col.hf-col-wrong {
  width: 16%;
}

.high-freq-errors-table col.hf-col-rate {
  width: 22%;
}

.high-freq-errors-table th,
.high-freq-errors-table td {
  vertical-align: middle;
  text-align: center;
  padding: 12px 16px;
}

.high-freq-errors-table th {
  cursor: default;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: var(--surface);
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}

.high-freq-errors-table th:hover {
  background: var(--surface);
  color: var(--text-secondary);
}

.high-freq-errors-table td {
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.high-freq-errors-table tbody tr:last-child td {
  border-bottom: none;
}

.high-freq-errors-table tbody tr:hover {
  background: var(--primary-muted);
}

.high-freq-errors-table .hf-cell-rank {
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.high-freq-errors-table .hf-cell-paper {
  max-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.high-freq-errors-table .hf-cell-wrong {
  font-weight: 600;
  color: var(--error);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.high-freq-errors-table .hf-question-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.high-freq-errors-table .hf-question-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.high-freq-errors-table .hf-cell-rate .tag {
  min-width: 52px;
  text-align: center;
}

.high-freq-errors-empty {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-light);
  font-size: 13px;
}

.analysis-block__body--flush .hw-table {
  border: none;
  border-radius: 0;
}

.analysis-block__body--flush .hw-paper-list__pager {
  margin-top: 0;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
}

.card-title--sub {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.weak-kp-chart {
  width: 100%;
  min-height: 320px;
}

.weak-kp-cloud-box {
  flex: 1;
  width: 100%;
  min-height: 320px;
  box-sizing: border-box;
  border-radius: var(--radius-md);
  background: radial-gradient(ellipse 95% 90% at 50% 50%, var(--primary-light) 0%, #fff 75%);
  overflow: hidden;
}

.high-freq-errors-footer {
  display: flex;
  justify-content: center;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
  margin-top: 0;
}

.high-freq-errors-footer:empty {
  display: none;
  padding: 0;
  border: 0;
  margin: 0;
}

.question-id-code {
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.page-cockpit .class-chart-scroll--active > [id$='Chart'] {
  min-height: 200px;
}

.page-cockpit .class-chart-scroll-tip {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
  color: var(--text-secondary);
}

.page-cockpit .report-placeholder {
  padding: 80px 24px;
  text-align: center;
  color: var(--text-secondary);
}

.page-cockpit .report-placeholder__title {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--text-primary);
}

.page-cockpit .report-placeholder__desc,
.page-cockpit .report-placeholder__hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}

.page-cockpit .report-placeholder__hint {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-light);
}

.page-cockpit .report-body {
  padding: 16px;
}

.page-cockpit #mainTabs [data-tab='homework'][hidden] {
  display: none !important;
}

.page-loading {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}

.page-cockpit .ai-card,
.page-student-detail .ai-card,
.page-diagnosis .ai-card--insight {
  border-left: 4px solid var(--primary);
}

/* ========== 全站页面壳统一 ========== */
.page-cockpit .main-content {
  max-width: 1440px;
}

.page-student-detail .main-content {
  max-width: 1280px;
}

.pagination-info {
  text-align: center;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.page-student-detail .student-info-card {
  border-radius: var(--radius-lg);
}

.page-student-detail .metric-card {
  text-align: left;
}

.student-report-card {
  text-align: center;
  padding: 32px;
}

.student-report-card__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.student-report-card__desc {
  font-size: 13px;
  color: var(--text-light);
  margin: 0 0 16px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.card--flat-title {
  padding-top: 20px;
}

.card--flat-title > .card-title:first-child {
  margin-bottom: 16px;
  padding: 0 4px;
}

/* ========== 二十六、响应式 ========== */
@media (max-width: 1400px) {
  .grid-5,
  .core-metrics-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .core-metrics-grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }

  .main-content {
    margin-left: 0;
  }

  .grid-5,
  .grid-4,
  .grid-3,
  .core-metrics-grid,
  .tier-grid {
    grid-template-columns: 1fr;
  }

  .analysis-grid--2,
  .analysis-split {
    grid-template-columns: 1fr;
  }

  .chart-panel--md {
    height: 280px;
    min-height: 240px;
  }

  .board-toolbar__fields,
  .filter-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-toolbar .filter-field--search .input {
    width: 100%;
  }

  .board-metrics-layout,
  .board-metrics-layout--compact {
    grid-template-columns: 1fr 1fr;
  }

  .overview-metric--hero .overview-metric__value {
    font-size: 28px;
  }

  .hw-action-bar {
    flex-direction: column;
    align-items: stretch;
    bottom: 0;
  }

  .hw-action-bar__btn {
    width: 100%;
    min-width: 0;
  }

  .hw-picker__table-zone,
  .hw-picker__pager,
  .hw-filter-row,
  .hw-workspace__table-label {
    margin-left: 16px;
    margin-right: 16px;
  }

  .hw-workspace__head {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hw-table col.hw-table__col-name {
    width: 30%;
  }

  .hw-table col.hw-table__col-participate {
    width: 26%;
  }
}