/* ============================================================
   镇江中考个人学习管理系统 · v30「晨光 Clear Focus · 双主题」
   - 在 v29 基础上新增深色/浅色主题切换（data-theme 属性驱动）
   - 颜色全面 Token 化：html[data-theme="dark"] 覆盖变量即换肤
   - 打印样式强制浅色变量，不受主题影响
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  color-scheme: light;
  /* 表面层（列表条目、次级底色） */
  --surface-soft: #f8f9fd;
  --surface-deep: #f2f3f9;
  --surface-hover: #fafbfe;
  /* 色彩 Token */
  --primary: #4f63f2;
  --primary-dark: #3d4fd8;
  --primary-deep: #3147c2;
  --primary-light: #eef0fe;
  --primary-tint: rgba(79, 99, 242, 0.10);
  --accent: #22b8a0;
  --success: #0f9d6c;
  --success-light: #e2f7ee;
  --warning: #e8890c;
  --warning-light: #fdf3e3;
  --danger: #e5484d;
  --danger-light: #fdecec;
  --purple: #8b5cf6;
  /* 中性色 */
  --bg: #f4f5fa;
  --card: #ffffff;
  --text: #1b2130;
  --text-muted: #5c6577;
  --text-faint: #8a93a6;
  --border: #e7e9f2;
  --border-strong: #d6dae8;
  /* 形状与投影 */
  --radius-lg: 16px;
  --radius: 12px;
  --radius-sm: 9px;
  --shadow-sm: 0 1px 2px rgba(23, 30, 55, 0.04), 0 2px 8px -4px rgba(23, 30, 55, 0.06);
  --shadow-md: 0 2px 4px rgba(23, 30, 55, 0.04), 0 10px 28px -12px rgba(23, 30, 55, 0.14);
  --shadow-primary: 0 6px 18px -6px rgba(79, 99, 242, 0.5);
  /* 侧边栏 */
  --sidebar-bg: linear-gradient(180deg, #151c33 0%, #0d1326 100%);
  --sidebar-text: #a7b0c8;
  --sidebar-border: rgba(255, 255, 255, 0.07);
}

* { box-sizing: border-box; max-width: 100%; }
html, body {
  margin: 0; padding: 0;
  width: 100%; max-width: 100%;
  height: 100%;
  overflow-x: hidden;
  overflow-x: clip;
  -webkit-overflow-scrolling: touch;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(900px 420px at 85% -8%, rgba(79, 99, 242, 0.07), transparent 62%),
    radial-gradient(700px 380px at -10% 12%, rgba(34, 184, 160, 0.05), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  position: relative;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}
img, table, canvas, video { max-width: 100%; }
table { table-layout: auto; }

::selection { background: rgba(79, 99, 242, 0.18); }

/* 细滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: #c9cfdd; border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #b3bbce; }
::-webkit-scrollbar-track { background: transparent; }

::placeholder { color: #9aa3b5; opacity: 1; }
::-webkit-input-placeholder { color: #9aa3b5; }
::-moz-placeholder { color: #9aa3b5; opacity: 1; }

/* 全局可见焦点（键盘可达性） */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.app { display: flex; min-height: 100vh; }

/* ============ 侧边栏 ============ */
.sidebar {
  width: 224px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}
.sidebar::after {
  content: '';
  position: absolute; top: -140px; left: -60px;
  width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 99, 242, 0.22), transparent 68%);
  pointer-events: none;
}
.logo {
  padding: 22px 18px; display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid var(--sidebar-border);
  position: relative; z-index: 1;
}
.logo-icon {
  font-size: 22px; width: 40px; height: 40px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(79, 99, 242, 0.9), rgba(139, 92, 246, 0.85));
  border-radius: 12px;
  box-shadow: 0 4px 14px -4px rgba(79, 99, 242, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.logo-title { color: #fff; font-weight: 700; font-size: 13px; white-space: nowrap; letter-spacing: 0.2px; }
.logo-sub { font-size: 11px; color: #7d87a3; margin-top: 1px; }
.nav {
  flex: 1; padding: 14px 10px; overflow-y: auto; min-height: 0;
  -webkit-overflow-scrolling: touch;
  position: relative; z-index: 1;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.15) transparent;
}
.nav::-webkit-scrollbar { width: 5px; }
.nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.14); border-radius: 6px; }
.nav-item {
  display: block; padding: 9px 13px; border-radius: 10px;
  color: var(--sidebar-text); text-decoration: none; cursor: pointer;
  margin-bottom: 2px; font-size: 13.5px; transition: all 0.18s ease;
  position: relative;
}
.nav-item:hover { background: rgba(255, 255, 255, 0.07); color: #eef1fa; }
.nav-item.active {
  background: linear-gradient(135deg, #4f63f2, #6d5df6);
  color: #fff; font-weight: 600;
  box-shadow: 0 6px 16px -6px rgba(79, 99, 242, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.sidebar-footer { padding: 16px 18px; border-top: 1px solid var(--sidebar-border); position: relative; z-index: 1; }
.countdown-mini { text-align: center; font-size: 12px; color: #7d87a3; }
.countdown-mini strong { color: #ffc24b; font-size: 19px; display: block; font-variant-numeric: tabular-nums; letter-spacing: 0.5px; }

/* ============ 主内容 ============ */
.main { flex: 1; margin-left: 224px; padding: 28px 32px; max-width: 100%; min-width: 0; }
.view { display: none; }
.view.active { display: block; animation: fadeIn 0.28s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.page-header {
  display: flex; justify-content: space-between; align-items: center; min-width: 0;
  margin-bottom: 22px; flex-wrap: wrap; gap: 10px;
}
.page-header h1 { font-size: 22px; font-weight: 800; letter-spacing: -0.3px; }
.page-count-badge {
  display: inline-block; background: var(--primary-light); color: var(--primary-dark);
  font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 20px;
  margin-left: 12px; vertical-align: middle;
}
.today-label { color: var(--text-muted); font-size: 13px; white-space: nowrap; }

.card {
  background: var(--card); border-radius: var(--radius-lg); padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px; overflow: hidden;
  transition: box-shadow 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-md); }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.card-header h3 { font-size: 15px; font-weight: 700; }
.card h3 { font-size: 15px; font-weight: 700; margin-bottom: 14px; letter-spacing: -0.1px; }
.section-title { font-size: 15px; font-weight: 700; margin: 26px 0 12px; color: var(--text); letter-spacing: -0.1px; }

/* ============ 英雄卡片（中考倒计时） ============ */
.hero-card {
  position: relative; overflow: hidden;
  background: linear-gradient(128deg, #4f63f2 0%, #6d5df6 58%, #8b5cf6 100%);
  border-radius: var(--radius-lg); padding: 30px 34px; color: #fff;
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 22px;
  box-shadow: 0 12px 32px -12px rgba(79, 99, 242, 0.55);
}
.hero-card::before {
  content: ''; position: absolute; top: -90px; right: -40px;
  width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.16), transparent 66%);
  pointer-events: none;
}
.hero-card::after {
  content: ''; position: absolute; bottom: -110px; left: 26%;
  width: 220px; height: 220px; border-radius: 50%;
  border: 36px solid rgba(255, 255, 255, 0.05);
  pointer-events: none;
}
.hero-label { font-size: 14px; opacity: 0.88; letter-spacing: 1px; }
.hero-days {
  font-size: 60px; font-weight: 800; line-height: 1.08; margin: 4px 0;
  font-variant-numeric: tabular-nums; letter-spacing: -1px;
  text-shadow: 0 3px 14px rgba(0, 0, 0, 0.16);
}
.hero-date { font-size: 13px; opacity: 0.78; }
.hero-right { display: flex; flex-wrap: wrap; gap: 14px; position: relative; z-index: 1; min-width: 0; }
.hero-stat {
  text-align: center; padding: 12px 20px; border-radius: 14px;
  background: rgba(255, 255, 255, 0.13);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.hero-num { font-size: 26px; font-weight: 700; display: block; font-variant-numeric: tabular-nums; }
.hero-unit { font-size: 12px; opacity: 0.85; }

.badge {
  background: var(--primary-light); color: var(--primary-dark);
  padding: 3px 11px; border-radius: 20px; font-size: 12px; font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ============ 按钮 ============ */
.btn {
  padding: 8px 16px; border-radius: 10px; border: none; cursor: pointer;
  font-size: 13px; font-weight: 600; transition: all 0.16s ease;
  display: inline-flex; align-items: center; gap: 5px;
  font-family: inherit; line-height: 1.5;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: linear-gradient(135deg, #4f63f2, #5e55f4);
  color: #fff; box-shadow: var(--shadow-primary);
}
.btn-primary:hover { background: linear-gradient(135deg, #4559ee, #5e55f4); box-shadow: 0 8px 22px -6px rgba(79, 99, 242, 0.6); transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.97); }
.btn-outline {
  background: var(--card); border: 1px solid var(--border-strong); color: var(--text-muted);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.btn-sm { padding: 5px 11px; font-size: 12px; border-radius: 8px; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #d63c41; }

/* ============ 输入 ============ */
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.quick-add-row { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; margin: -6px 0 14px; padding: 10px 12px; background: var(--card); border: 1px solid var(--border-strong); border-radius: 10px; }
.quick-add-row label { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; cursor: pointer; }
.quick-add-row input[type=checkbox] { width: 15px; height: 15px; accent-color: #2563eb; cursor: pointer; }
.quick-add-row .btn { margin-left: auto; }
.input {
  padding: 8px 12px; border: 1px solid var(--border-strong); border-radius: 10px;
  font-size: 13px; outline: none; background: var(--card);
  transition: border-color 0.15s, box-shadow 0.15s;
  color: var(--text); font-family: inherit;
}
.input:hover { border-color: #b9c1d6; }
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-tint); }
.input-sm { padding: 4px 9px; width: 92px; border-radius: 8px; }

/* ============ 任务列表 ============ */
.task-list { display: flex; flex-direction: column; gap: 8px; }
.task-item {
  display: flex; align-items: center; gap: 10px; padding: 11px 13px;
  background: var(--surface-soft); border-radius: 10px; border: 1px solid var(--border);
  user-select: none; transition: border-color 0.15s, background 0.15s;
}
.task-item:hover { border-color: #cdd4e6; }
.task-item.done .task-text { text-decoration: line-through; color: var(--text-faint); }
.task-check {
  width: 20px; height: 20px; border: 2px solid #c3cade; border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: all 0.18s ease; color: transparent; font-size: 12px;
}
.task-check:hover { border-color: var(--success); }
.task-check.checked {
  background: var(--success); border-color: var(--success); color: #fff;
  box-shadow: 0 3px 10px -3px rgba(15, 157, 108, 0.6);
}
.task-text { flex: 1; min-width: 0; overflow-wrap: break-word; user-select: text; cursor: text; }
.task-subject {
  font-size: 11px; padding: 2px 9px; border-radius: 10px;
  background: var(--primary-light); color: var(--primary-dark);
  flex-shrink: 0; user-select: text; font-weight: 600;
}
.task-locked { opacity: 0.62; background: #f3f4f9 !important; }
.record-locked { opacity: 0.78; background: #f6f7fb !important; }
.task-actions { display: flex; gap: 4px; }
.task-actions button {
  background: none; border: none; cursor: pointer; font-size: 13px;
  padding: 3px 7px; border-radius: 6px; color: var(--text-faint);
  transition: all 0.14s;
}
.task-actions button:hover { background: var(--danger-light); color: var(--danger); }
.task-drag-handle { cursor: grab; color: #aab3c6; font-size: 16px; padding: 0 4px; user-select: none; flex-shrink: 0; }
.task-drag-handle:active { cursor: grabbing; }
.task-item[draggable="true"] { cursor: default; }
.empty-state { text-align: center; padding: 34px; color: var(--text-faint); font-size: 13px; }

/* ============ 记录列表 ============ */
.record-list { display: flex; flex-direction: column; gap: 10px; }
.record-item {
  padding: 12px 15px; background: var(--surface-soft); border-radius: 10px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
}
.record-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
.record-subject { font-weight: 600; font-size: 13px; }
.record-duration { font-size: 12px; color: var(--primary); font-weight: 700; font-variant-numeric: tabular-nums; }
.record-content { font-size: 13px; color: var(--text); }
.record-notes { font-size: 12px; color: var(--text-muted); margin-top: 4px; font-style: italic; }
.record-date { font-size: 11px; color: var(--text-faint); }

/* ============ 打印样式（与 v28 保持一致） ============ */
@media print {
  @page { size: A4 landscape; margin: 5mm; }
  /* 打印永远浅色：深色主题下强制复位变量 */
  html, html[data-theme="dark"] {
    --primary-light: #eef0fe; --success-light: #e2f7ee; --warning-light: #fdf3e3;
    --danger-light: #fdecec; --bg: #f4f5fa; --card: #ffffff; --text: #1b2130;
    --text-muted: #5c6577; --text-faint: #8a93a6; --border: #e7e9f2; --border-strong: #d6dae8;
    --surface-soft: #f8f9fd; --surface-deep: #f2f3f9; --surface-hover: #fafbfe;
  }
  * { -webkit-print-color-adjust: exact !important; print-color-adjust: exact !important; }
  html, body { height: auto !important; overflow: visible !important; }
  body { background: #fff !important; color: #1e293b; font-family: "Microsoft YaHei", sans-serif; margin: 0; padding: 0; text-align: center !important; }
  .sidebar, .topbar, .hamburger, .mobile-header, .mobile-title, .sidebar-overlay,
  .page-header button, .score-list, #scoreList,
  .view:not(#view-scores), .toast, .modal-overlay,
  .score-card-drag, .score-card-actions, .goal-actions,
  .school-card-drag, .school-card-actions, .school-card-total, .school-card-note,
  .icp-footer {
    display: none !important; visibility: hidden !important; opacity: 0 !important;
    width: 0 !important; height: 0 !important; padding: 0 !important; margin: 0 !important;
    position: static !important; }
  #view-scores { display: block !important; page-break-after: auto !important; page-break-inside: auto !important; background: #fff !important; width: 100% !important; margin: 0 auto !important; text-align: left !important; }
  #view-scores .card:nth-of-type(2) { height: auto !important; max-height: none !important; overflow: visible !important; }
  #view-scores .card:nth-of-type(3) { height: auto !important; max-height: none !important; overflow: visible !important; }
  #view-scores .card { page-break-inside: avoid !important; break-inside: avoid !important; }
  #view-scores .card:nth-of-type(4) { height: auto !important; max-height: none !important; overflow: visible !important; width: 100% !important; box-sizing: border-box !important; margin-top: 8px !important; text-align: center !important; page-break-inside: avoid !important; }
  #view-scores #chartScoreTrend { height: 160px !important; max-height: 160px !important; min-height: 160px !important; width: 90% !important; margin: 0 auto !important; display: block !important; }
  #view-scores #chartScoreTrendImg { width: 90% !important; max-height: 160px !important; height: auto !important; margin: 0 auto !important; display: block !important; object-fit: contain !important; }
  .main { margin-left: 0 !important; padding: 0 !important; background: #fff; height: auto !important; flex: none !important; display: block !important; }
  .app { display: block !important; height: auto !important; min-height: auto !important; }
  .page-header { text-align: center; margin-bottom: 4px; padding: 2px 0; background: transparent !important; border-bottom: 1px solid #e2e8f0 !important; display: block !important; visibility: visible !important; opacity: 1 !important; width: auto !important; height: auto !important; position: static !important; }
  .page-header h1 { font-size: 14px; color: #1e40af; margin: 0; text-align: center; font-weight: 700; }
  .page-header h1 { font-size: 16px; color: #1e40af; margin: 0; }
  .card { background: #fff; border: none; box-shadow: none;
    margin: 0 0 3px 0; padding: 4px 8px; break-inside: auto; border-radius: 0;
    height: auto !important; max-height: none !important; min-height: 0 !important; overflow: visible !important; }
  #view-scores .weak-subjects, #view-scores .school-grid { height: auto !important; max-height: none !important; overflow: visible !important; }
  .card h3 { font-size: 12px; color: #1e40af; margin: 0 0 4px 0; text-align: left !important; border-left: none; }
  .card-header-row { justify-content: flex-start !important; }
  .card-header-row h3 { text-align: left !important; }
  .trend-subject-filter { display: none !important; }
  #view-scores .school-grid { display: flex !important; flex-wrap: nowrap !important; gap: 4px !important; }
  #view-scores .school-card, #view-scores .school-card.above, #view-scores .school-card.below {
    position: relative; background: transparent !important; border: none !important; border-left: none !important;
    padding: 4px 2px !important; font-size: 10px !important; color: #1e293b; border-radius: 0;
    display: flex; flex-direction: column; align-items: center; text-align: center; min-height: 100px;
    flex: 1 1 0 !important; max-width: none !important; min-width: 0 !important; box-shadow: none !important; gap: 2px !important; min-height: 60px !important; }
  #view-scores .school-card::before, #view-scores .school-card::after { display: none !important; }
  #view-scores .school-ring { display: block; margin: 0 auto 2px auto; flex-shrink: 0; }
  #view-scores .school-card-name { font-size: 10px !important; font-weight: 700 !important; color: #1e293b; order: 2; margin-top: 1px; line-height: 1.2; }
  #view-scores .school-card-diff { font-size: 9px !important; padding: 1px 6px !important; border-radius: 8px; order: 3; margin-top: 1px; font-weight: 600; }
  #view-scores .school-card.above .school-card-diff { background: #dcfce7; color: #059669; }
  #view-scores .school-card.below .school-card-diff { background: #fef3c7; color: #d97706; }
  #view-scores .weak-subjects { display: flex !important; flex-direction: column !important; gap: 3px !important; width: 100% !important; }
  #view-scores .weak-item { display: flex !important; flex-direction: row !important; align-items: center !important; gap: 8px !important; padding: 2px 12px !important; background: #f8fafc !important; border: 1px solid #e2e8f0 !important; border-radius: 6px !important; width: 100% !important; box-sizing: border-box !important; min-height: 15px !important; }
  #view-scores .weak-rank { width: 18px !important; height: 18px !important; font-size: 10px !important; flex-shrink: 0 !important; }
  #view-scores .weak-name { font-size: 11px !important; min-width: 55px !important; font-weight: 700 !important; flex-shrink: 0 !important; }
  #view-scores .weak-score { font-size: 10px !important; min-width: 48px !important; flex-shrink: 0 !important; }
  #view-scores .weak-bar-wrap { flex: 1 !important; height: 7px !important; min-width: 60px !important; }
  #view-scores .weak-rate { font-size: 10px !important; min-width: 38px !important; text-align: right !important; font-weight: 700 !important; flex-shrink: 0 !important; }
  #view-scores .weak-tag { font-size: 9px !important; padding: 2px 6px !important; flex-shrink: 0 !important; white-space: nowrap !important; }
  #view-scores > div:nth-child(5) { display: none !important; }

  @media (max-width: 900px) {
    #view-scores #chartScoreTrend { height: 120px !important; max-height: 120px !important; min-height: 120px !important; }
    #view-scores .school-ring { width: 44px !important; height: 44px !important; }
  }
}

/* ============ 节点提醒 ============ */
.milestone-alerts { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.alert-item {
  display: flex; align-items: center; gap: 14px; padding: 14px 18px;
  border-radius: var(--radius-lg); background: var(--card);
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary);
  transition: box-shadow 0.2s;
}
.alert-item:hover { box-shadow: var(--shadow-md); }
.alert-item.urgent { border-left-color: var(--danger); background: #fef7f7; }
.alert-item.soon { border-left-color: var(--warning); background: #fefaf3; }
.alert-days { text-align: center; min-width: 60px; }
.alert-days strong { font-size: 24px; font-weight: 800; display: block; color: var(--primary); font-variant-numeric: tabular-nums; }
.alert-item.urgent .alert-days strong { color: var(--danger); }
.alert-item.soon .alert-days strong { color: var(--warning); }
.alert-days span { font-size: 11px; color: var(--text-muted); }
.alert-info { flex: 1; min-width: 0; }
.alert-name { font-weight: 600; font-size: 14px; }
.alert-desc { font-size: 12px; color: var(--text-muted); }
.alert-date { font-size: 12px; color: var(--text-muted); white-space: nowrap; }

/* ============ 测试提醒 ============ */
.test-alert { display: flex; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.test-card {
  flex: 1; min-width: 240px; padding: 16px 20px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #f0f4ff 0%, #e6ecfe 100%);
  border: 1px solid #ccd8fb;
}
.test-card.error { background: linear-gradient(135deg, #f6f2fe 0%, #efe8fd 100%); border-color: #ddd0fa; }
.test-card.done { background: linear-gradient(135deg, #eafaf3 0%, #ddf4e9 100%); border-color: #bfe9d4; }
.test-label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.test-subjects { font-size: 18px; font-weight: 700; color: var(--primary); }
.test-card.error .test-subjects { color: var(--purple); }
.test-card.done .test-subjects { color: var(--success); }
.test-date { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ============ 仪表盘网格 ============ */
.dash-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; min-width: 0; }
.overview-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
.overview-card {
  background: var(--card); border-radius: var(--radius-lg); padding: 18px 14px;
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  cursor: pointer; transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s;
  text-align: center;
}
.overview-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: #cdd6f5; }
.ov-icon {
  font-size: 20px; margin: 0 auto 6px; width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-light); border-radius: 13px;
}
.ov-label { font-size: 11px; color: var(--text-muted); margin-bottom: 2px; }
.ov-value { font-size: 19px; font-weight: 700; font-variant-numeric: tabular-nums; }
.ov-value small { font-size: 11px; color: var(--text-muted); font-weight: 400; }
.ov-progress { height: 5px; background: var(--border); border-radius: 3px; margin-top: 8px; overflow: hidden; }
.ov-progress-bar { height: 100%; background: linear-gradient(90deg, #4f63f2, #22b8a0); border-radius: 3px; transition: width 0.3s; }

/* ============ 知识积累 ============ */
.knowledge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.counter-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.counter-row label { font-size: 13px; color: var(--text-muted); }
.counter-hint { font-size: 12px; color: var(--text-faint); margin: 8px 0; }
.counter-progress { display: flex; align-items: center; gap: 10px; margin: 12px 0; }
.cp-bar { flex: 1; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.cp-fill { height: 100%; background: linear-gradient(90deg, #4f63f2, #22b8a0); border-radius: 4px; transition: width 0.3s; }
.counter-progress span { font-weight: 700; font-size: 13px; min-width: 40px; text-align: right; font-variant-numeric: tabular-nums; }

/* ============ 成绩分析 ============ */
.school-compare { display: flex; flex-direction: column; gap: 12px; }
.school-item {
  padding: 14px 16px; background: var(--surface-soft); border-radius: 10px;
  border: 1px solid var(--border);
}
.school-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.school-name { font-weight: 700; font-size: 15px; }
.school-diff { font-weight: 700; font-size: 16px; padding: 2px 10px; border-radius: 10px; font-variant-numeric: tabular-nums; }
.school-diff.above { color: var(--success); background: var(--success-light); }
.school-diff.below { color: var(--danger); background: var(--danger-light); }
.school-detail { font-size: 13px; color: var(--text-muted); }
.school-actions { display: flex; gap: 6px; margin-top: 8px; }
.school-actions button {
  font-size: 12px; padding: 3px 9px; border-radius: 7px;
  border: 1px solid var(--border-strong); background: var(--card);
  cursor: pointer; color: var(--text-muted); transition: all 0.14s;
}
.school-actions button:hover { border-color: var(--danger); color: var(--danger); }

.weak-subjects { display: flex; flex-direction: column; gap: 8px; }
.weak-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  background: var(--surface-soft); border-radius: 10px; border: 1px solid var(--border);
}
.weak-rank {
  width: 24px; height: 24px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; font-weight: 700;
  font-size: 12px; color: #fff; flex-shrink: 0;
}
.weak-rank.r1 { background: var(--danger); }
.weak-rank.r2 { background: var(--warning); }
.weak-rank.r3 { background: #c99406; }
.weak-rank.rn { background: #8a93a6; }
.weak-name { font-weight: 600; min-width: 80px; }
.weak-score { font-size: 13px; color: var(--text-muted); }
.weak-bar-wrap { flex: 1; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.weak-bar { height: 100%; border-radius: 4px; transition: width 0.3s; }
.weak-rate { font-size: 13px; font-weight: 600; min-width: 50px; text-align: right; font-variant-numeric: tabular-nums; }
.weak-tag { font-size: 11px; padding: 2px 8px; border-radius: 10px; font-weight: 600; }
.weak-tag.danger { background: var(--danger-light); color: #d63c41; }
.weak-tag.warn { background: #fdf6d8; color: #a07c08; }
.weak-tag.ok { background: var(--success-light); color: var(--success); }

.score-list { display: flex; flex-direction: column; gap: 10px; }
.score-item { padding: 12px 16px; background: var(--surface-soft); border-radius: 10px; border: 1px solid var(--border); }
.score-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.score-exam { font-weight: 600; }
.score-total { font-weight: 700; color: var(--primary); font-size: 16px; font-variant-numeric: tabular-nums; }
.score-subjects { font-size: 12px; color: var(--text-muted); display: flex; flex-wrap: wrap; gap: 8px; }
.score-actions { display: flex; gap: 6px; margin-top: 8px; }
.score-actions button {
  font-size: 12px; padding: 3px 9px; border-radius: 7px;
  border: 1px solid var(--border-strong); background: var(--card);
  cursor: pointer; color: var(--text-muted); transition: all 0.14s;
}
.score-actions button:hover { border-color: var(--primary); color: var(--primary); }
.score-actions .del:hover { border-color: var(--danger); color: var(--danger); }

/* ============ 目标拆解 ============ */
.goal-calc { max-width: 500px; }
.calc-result {
  margin-top: 16px; padding: 16px 18px; background: var(--primary-light);
  border: 1px solid #d9defb;
  border-radius: 12px; font-size: 14px; line-height: 1.8;
}
.calc-result .big { font-size: 24px; font-weight: 800; color: var(--primary); font-variant-numeric: tabular-nums; }
.goal-list { display: flex; flex-direction: column; gap: 10px; }
.goal-item {
  padding: 14px 16px; background: var(--surface-soft); border-radius: 12px;
  border: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center;
  transition: border-color 0.15s;
}
.goal-item:hover { border-color: #cdd4e6; }
.goal-info { flex: 1; }
.goal-name { font-weight: 600; font-size: 14px; }
.goal-detail { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.goal-days { font-size: 20px; font-weight: 800; color: var(--primary); text-align: center; min-width: 80px; font-variant-numeric: tabular-nums; }
.goal-days small { display: block; font-size: 11px; font-weight: 400; color: var(--text-muted); }
.goal-actions { display: flex; gap: 6px; margin-left: 12px; }
.goal-actions button {
  font-size: 12px; padding: 3px 9px; border-radius: 7px;
  border: 1px solid var(--border-strong); background: var(--card);
  cursor: pointer; color: var(--text-muted); transition: all 0.14s;
}
.goal-actions button:hover { border-color: var(--danger); color: var(--danger); }

/* ============ 时间线 ============ */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ''; position: absolute; left: 8px; top: 4px; bottom: 4px; width: 2px; background: linear-gradient(180deg, #cdd4e6, var(--border)); border-radius: 2px; }
.tl-item {
  position: relative; padding: 16px 20px; background: var(--card);
  border-radius: var(--radius-lg); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); margin-bottom: 14px;
  transition: box-shadow 0.2s;
}
.tl-item:hover { box-shadow: var(--shadow-md); }
.tl-item::before {
  content: ''; position: absolute; left: -26px; top: 22px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--primary); border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--primary);
}
.tl-item.past::before { background: #a7b0c3; box-shadow: 0 0 0 2px #c3cade; }
.tl-item.urgent::before { background: var(--danger); box-shadow: 0 0 0 2px var(--danger); }
.tl-head { display: flex; justify-content: space-between; align-items: center; }
.tl-name { font-weight: 700; font-size: 15px; }
.tl-countdown { font-size: 13px; font-weight: 600; color: var(--primary); font-variant-numeric: tabular-nums; }
.tl-item.urgent .tl-countdown { color: var(--danger); }
.tl-item.past .tl-countdown { color: var(--text-faint); }
.tl-date { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.tl-desc { font-size: 13px; color: var(--text); margin-top: 6px; }
.tl-actions { display: flex; gap: 6px; margin-top: 10px; }
.tl-actions button {
  font-size: 12px; padding: 4px 10px; border-radius: 7px;
  border: 1px solid var(--border-strong); background: var(--card);
  cursor: pointer; color: var(--text-muted); transition: all 0.14s;
}
.tl-actions button:hover { border-color: var(--primary); color: var(--primary); }
.tl-actions .del:hover { border-color: var(--danger); color: var(--danger); }

/* ============ 统计 ============ */
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.stats-grid .card canvas { max-height: 280px; }
.stat-summary { display: flex; flex-direction: column; gap: 12px; padding: 10px 0; }
.stat-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--border); }
.stat-row:last-child { border-bottom: none; }
.stat-row .label { color: var(--text-muted); font-size: 13px; }
.stat-row .value { font-weight: 700; font-size: 16px; font-variant-numeric: tabular-nums; }

/* ============ 数据管理 ============ */
.data-actions { display: flex; gap: 12px; margin-top: 12px; flex-wrap: wrap; }
.muted { color: var(--text-muted); font-size: 13px; margin-bottom: 8px; }
.form-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.form-row label { min-width: 100px; font-size: 13px; color: var(--text-muted); }
.score-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.score-table th, .score-table td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.score-table th { background: var(--surface-deep); font-weight: 600; color: var(--text-muted); }
.score-table tr:last-child td { border-bottom: none; }
.score-table .total-row { font-weight: 700; background: var(--primary-light); }
.score-table .total-row td { border-bottom: none; }
.score-table tbody tr:hover td { background: var(--surface-hover); }

/* ============ 模态框 ============ */
.modal-overlay {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 20, 38, 0.55); backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
  z-index: 1000; justify-content: center; align-items: center;
}
.modal-overlay.show { display: flex; animation: fadeIn 0.2s ease; }
.modal {
  background: var(--card); border-radius: 18px; width: 90%; max-width: 520px;
  max-height: 85vh; overflow-y: auto;
  box-shadow: 0 24px 70px -18px rgba(15, 20, 38, 0.4);
  animation: modalIn 0.22s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(14px) scale(0.985); } to { opacity: 1; transform: none; } }
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 22px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: var(--card); z-index: 1;
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-close {
  background: var(--surface-deep); border: none; width: 30px; height: 30px; border-radius: 9px;
  font-size: 14px; cursor: pointer; color: var(--text-muted);
  display: flex; align-items: center; justify-content: center; transition: all 0.14s;
}
.modal-close:hover { background: var(--danger-light); color: var(--danger); }
.modal-body { padding: 20px 22px; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 5px; font-weight: 600; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border-strong); border-radius: 10px;
  font-size: 13px; outline: none; font-family: inherit; color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-tint); }
.form-group textarea { resize: vertical; min-height: 60px; }
.modal-footer { padding: 0 20px 20px; display: flex; gap: 10px; justify-content: flex-end; }
.score-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* ============ Toast ============ */
.toast {
  position: fixed; bottom: 26px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1c2438; color: #fff; padding: 11px 22px; border-radius: 12px;
  font-size: 13px; opacity: 0; transition: all 0.25s; z-index: 2000;
  pointer-events: none; box-shadow: 0 12px 32px -8px rgba(15, 20, 38, 0.5);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============ 响应式（平板） ============ */
@media (max-width: 1000px) {
  .overview-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .logo-title, .logo-sub, .sidebar-footer { display: none; }
  .nav-item { text-align: center; padding: 12px 0; font-size: 20px; }
  .main { margin-left: 60px; padding: 16px; }
  .hero-card { flex-direction: column; text-align: center; gap: 16px; }
  .hero-right { gap: 20px; }
  .dash-grid, .stats-grid { grid-template-columns: 1fr; }
  .overview-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============ 登录注册层 ============ */
.auth-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(800px 500px at 18% 12%, rgba(109, 93, 246, 0.5), transparent 62%),
    radial-gradient(700px 520px at 85% 82%, rgba(34, 184, 160, 0.32), transparent 60%),
    radial-gradient(600px 400px at 78% 8%, rgba(79, 99, 242, 0.42), transparent 58%),
    linear-gradient(150deg, #171e36 0%, #10162b 100%);
  display: flex; align-items: center; justify-content: center;
  z-index: 3000; padding: 20px;
}
.auth-overlay::before {
  content: ''; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 26px 26px; pointer-events: none;
}
.auth-overlay.hidden { display: none; }
.auth-box {
  position: relative;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 22px; padding: 36px 32px;
  width: 380px; max-width: 92vw;
  box-shadow: 0 30px 80px -20px rgba(5, 10, 30, 0.65);
  text-align: center;
  animation: modalIn 0.32s ease;
}
.auth-logo {
  font-size: 26px; width: 64px; height: 64px; margin: 0 auto 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #4f63f2, #8b5cf6);
  border-radius: 20px;
  box-shadow: 0 12px 28px -8px rgba(79, 99, 242, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
.auth-title { font-size: 18px; font-weight: 800; color: var(--text); margin-bottom: 22px; letter-spacing: -0.2px; }
.auth-tabs {
  display: flex; gap: 4px; margin-bottom: 20px;
  border-radius: 12px; overflow: hidden;
  background: var(--surface-deep); padding: 4px;
}
.auth-tab {
  flex: 1; padding: 9px; border: none; background: transparent;
  cursor: pointer; font-size: 14px; color: var(--text-muted); font-weight: 600;
  border-radius: 9px; transition: all 0.18s; font-family: inherit;
}
.auth-tab.active { background: var(--card); color: var(--primary-dark); box-shadow: 0 2px 8px -2px rgba(23, 30, 55, 0.18); }
.auth-form { display: flex; flex-direction: column; gap: 12px; }
.auth-input {
  padding: 12px 14px; border: 1px solid var(--border-strong); border-radius: 12px;
  font-size: 14px; outline: none; transition: border-color 0.15s, box-shadow 0.15s;
  font-family: inherit; color: var(--text);
}
.auth-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-tint); }
.pwd-wrap { position: relative; }
.pwd-wrap .auth-input, .pwd-wrap .input { width: 100%; padding-right: 40px; }
.pwd-toggle {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  cursor: pointer; font-size: 16px; user-select: none; z-index: 2;
  opacity: 0.75; transition: opacity 0.14s;
}
.pwd-toggle:hover { opacity: 1; }
input::-ms-reveal, input::-ms-clear { display: none; }
input::-webkit-credentials-auto-fill-button { display: none; }
.auth-btn {
  padding: 12px; border: none; border-radius: 12px;
  background: linear-gradient(135deg, #4f63f2, #5e55f4);
  color: #fff; font-size: 15px; font-weight: 700; cursor: pointer;
  transition: all 0.16s; margin-top: 4px; font-family: inherit;
  box-shadow: var(--shadow-primary); letter-spacing: 2px;
}
.auth-btn:hover { background: linear-gradient(135deg, #4559ee, #5e55f4); box-shadow: 0 10px 24px -6px rgba(79, 99, 242, 0.62); transform: translateY(-1px); }
.auth-btn:active { transform: scale(0.98); }
.auth-btn-guest {
  background: var(--surface-deep); color: var(--text-muted);
  font-size: 13px; padding: 10px; margin-top: 8px;
  box-shadow: none; letter-spacing: 0;
}
.auth-btn-guest:hover { background: #e4e7f0; color: var(--text); box-shadow: none; transform: none; }
.readonly-badge {
  display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 6px;
  background: var(--danger); color: #fff; font-weight: 700; margin-left: 6px;
  letter-spacing: 1px;
}
/* 人机验证按钮（覆盖 index.html 内联样式，与输入框风格统一） */
#powBtn {
  width: 100% !important; padding: 12px !important;
  background: var(--surface-deep) !important;
  border: 1px solid var(--border-strong) !important;
  border-radius: 12px !important;
  cursor: pointer; font-size: 14px !important;
  font-family: inherit; color: var(--text-muted) !important;
  font-weight: 600; transition: all 0.15s;
}
#powBtn:hover { border-color: var(--primary) !important; color: var(--primary-dark) !important; background: var(--primary-light) !important; }

/* ============ 公告滚动栏 ============ */
.announcement-bar {
  display: flex; align-items: center; gap: 12px;
  background: linear-gradient(135deg, #fdf4dd, #fbe9b8);
  border: 1px solid #eccf8e; border-radius: 12px;
  padding: 10px 16px; margin-bottom: 20px;
  position: relative; box-shadow: 0 2px 10px -4px rgba(200, 150, 40, 0.25);
}
.announcement-icon { font-size: 18px; flex-shrink: 0; }
.announcement-scroll {
  flex: 1; min-width: 0; overflow: hidden; white-space: nowrap;
  font-size: 14px; color: #7c5a12; font-weight: 500;
}
.announcement-scroll .ann-item { display: inline-block; padding-right: 60px; }
.announcement-scroll .ann-title { font-weight: 700; margin-right: 8px; }
.announcement-close {
  background: rgba(124, 90, 18, 0.1); border: none; color: #7c5a12;
  padding: 5px 11px; border-radius: 8px; font-size: 12px; cursor: pointer;
  flex-shrink: 0; white-space: nowrap; transition: background 0.14s; font-family: inherit;
}
.announcement-close:hover { background: rgba(124, 90, 18, 0.2); }

/* 侧边栏公告红点 */
.nav-ann-badge {
  display: inline-block; background: var(--danger); color: #fff;
  font-size: 10px; font-weight: 700; padding: 1px 6px;
  border-radius: 10px; margin-left: 6px; vertical-align: middle;
  box-shadow: 0 2px 8px -2px rgba(229, 72, 77, 0.7);
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.75; transform: scale(1.08); }
}

/* ============ 公告管理列表 ============ */
.announcement-manage-list { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }
.announcement-manage-item {
  padding: 14px 18px; background: var(--surface-soft); border-radius: 12px;
  border: 1px solid var(--border); border-left: 4px solid var(--primary);
}
.announcement-manage-item.important { border-left-color: var(--danger); }
.announcement-manage-title { font-weight: 700; font-size: 15px; margin-bottom: 4px; }
.announcement-manage-content { color: var(--text-muted); font-size: 13px; margin-bottom: 8px; }
.announcement-manage-meta { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-muted); }
.announcement-manage-actions { display: flex; gap: 8px; }
.announcement-manage-actions button {
  background: none; border: 1px solid var(--border-strong); padding: 4px 11px;
  border-radius: 7px; font-size: 12px; cursor: pointer; color: var(--text-muted);
  white-space: nowrap; flex-shrink: 0; transition: all 0.14s; font-family: inherit;
}
.announcement-manage-actions button:hover { border-color: var(--danger); color: var(--danger); }

/* ============ 用户管理 ============ */
.user-list { display: flex; flex-direction: column; gap: 10px; }
.user-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--surface-soft); border-radius: 12px;
  border: 1px solid var(--border);
}
.user-item.banned { opacity: 0.6; background: #fdf2f2; }
.user-name { font-weight: 700; font-size: 15px; min-width: 100px; }
.user-tags { display: flex; gap: 6px; flex: 1; }
.user-tag { font-size: 11px; padding: 2px 9px; border-radius: 10px; font-weight: 600; }
.user-tag.admin { background: var(--primary-light); color: var(--primary-dark); }
.user-tag.readonly { background: var(--warning-light); color: #92620a; }
.user-tag.banned { background: var(--danger-light); color: var(--danger); }
.user-tag.normal { background: var(--success-light); color: var(--success); }
.user-meta { font-size: 12px; color: var(--text-muted); }
.user-actions { display: flex; gap: 8px; }
.user-actions button {
  padding: 5px 12px; border-radius: 8px; font-size: 12px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--card); color: var(--text-muted);
  font-family: inherit; transition: all 0.14s;
}
.user-actions button.ban-btn:hover { border-color: var(--danger); color: var(--danger); }
.user-actions button.unban-btn:hover { border-color: var(--success); color: var(--success); }

/* ============ 磁盘空间 ============ */
.storage-info { display: flex; flex-direction: column; gap: 8px; }
.storage-bar-wrap { background: #e6e9f2; border-radius: 8px; height: 24px; overflow: hidden; position: relative; }
.storage-bar { height: 100%; background: linear-gradient(90deg, #4f63f2, #7b95ff); transition: width 0.3s; border-radius: 8px; }
.storage-bar.warn { background: linear-gradient(90deg, #e8890c, #f4a94e); }
.storage-bar.danger { background: linear-gradient(90deg, #e5484d, #f47b7f); }
.storage-bar-text { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 12px; font-weight: 600; color: var(--text); }
.storage-detail { display: flex; gap: 20px; font-size: 13px; color: var(--text-muted); }

/* ============ 反馈列表 ============ */
.feedback-list { display: flex; flex-direction: column; gap: 12px; }
.feedback-item {
  padding: 14px 18px; background: var(--card); border-radius: 12px;
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
}
.feedback-item.unread { border-left: 4px solid var(--primary); }
.feedback-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.feedback-user { font-weight: 700; font-size: 14px; }
.feedback-type { font-size: 11px; padding: 2px 9px; border-radius: 10px; background: var(--surface-deep); color: var(--text-muted); margin-left: 8px; }
.feedback-date { font-size: 12px; color: var(--text-faint); }
.feedback-content { font-size: 14px; line-height: 1.6; color: var(--text); margin-bottom: 10px; }
.feedback-actions { display: flex; gap: 8px; }
.feedback-actions button {
  padding: 4px 11px; border-radius: 7px; font-size: 12px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--card); color: var(--text-muted);
  font-family: inherit; transition: all 0.14s;
}
.feedback-actions button:hover { border-color: var(--primary); color: var(--primary); }
.feedback-actions button.del:hover { border-color: var(--danger); color: var(--danger); }
.auth-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; min-height: 18px; text-align: left; }
.auth-hint { font-size: 12px; color: var(--text-muted); margin-top: 16px; line-height: 1.7; }

/* ============ 用户信息（侧边栏底部） ============ */
.user-info {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 12px; padding-top: 12px; border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px; color: #7d87a3;
}
.user-info span { color: #dfe4f2; font-weight: 600; }
.logout-btn {
  background: rgba(255, 255, 255, 0.08); border: none; color: var(--sidebar-text);
  padding: 4px 10px; border-radius: 7px; font-size: 11px; cursor: pointer;
  font-family: inherit; transition: all 0.14s;
}
.logout-btn:hover { background: rgba(229, 72, 77, 0.25); color: #ff9a9d; }
.pwd-btn {
  background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.16);
  color: #dfe4f2; padding: 3px 9px; border-radius: 7px; font-size: 11px;
  cursor: pointer; margin-left: 6px; font-family: inherit; transition: all 0.14s;
}
.pwd-btn:hover { background: rgba(255, 255, 255, 0.16); }

/* ============ 邀请码列表 ============ */
.invite-list { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.invite-item {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 18px; background: var(--surface-soft); border-radius: 12px;
  border: 1px solid var(--border);
}
.invite-code {
  font-size: 22px; font-weight: 800; letter-spacing: 4px;
  color: var(--primary); font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  min-width: 140px; font-variant-numeric: tabular-nums;
}
.invite-item.used .invite-code { color: var(--text-faint); text-decoration: line-through; }
.invite-info { flex: 1; font-size: 12px; color: var(--text-muted); }
.invite-status { font-size: 12px; padding: 3px 11px; border-radius: 10px; font-weight: 600; }
.invite-status.unused { background: var(--success-light); color: var(--success); }
.invite-status.used { background: var(--surface-deep); color: var(--text-muted); }
.invite-copy {
  background: linear-gradient(135deg, #4f63f2, #5e55f4); color: #fff; border: none;
  padding: 6px 14px; border-radius: 8px; font-size: 12px; cursor: pointer;
  font-family: inherit; font-weight: 600; box-shadow: var(--shadow-primary); transition: all 0.14s;
}
.invite-copy:hover { transform: translateY(-1px); box-shadow: 0 8px 20px -6px rgba(79, 99, 242, 0.6); }
.invite-copy:active { transform: scale(0.97); }
.invite-del {
  background: none; border: 1px solid var(--border-strong); padding: 6px 11px;
  border-radius: 8px; font-size: 12px; cursor: pointer; color: var(--text-muted);
  font-family: inherit; transition: all 0.14s;
}
.invite-del:hover { border-color: var(--danger); color: var(--danger); }

/* 已使用邀请码折叠区域 */
.invite-used-section { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 12px; }
.invite-used-toggle {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; background: var(--surface-soft); border-radius: 10px;
  cursor: pointer; font-size: 13px; color: var(--text-muted); font-weight: 600;
  transition: background 0.15s; border: 1px solid transparent;
}
.invite-used-toggle:hover { background: var(--surface-hover); }
.invite-toggle-arrow { font-size: 10px; }
.invite-used-list { margin-top: 10px; display: flex; flex-direction: column; gap: 8px; }
.invite-item-compact { padding: 8px 14px; }
.invite-item-compact .invite-code { font-size: 16px; letter-spacing: 2px; }

/* ============ 移动端 ============ */
.mobile-header {
  display: none;
  position: fixed; top: 0; left: 0; right: 0;
  height: 54px; background: linear-gradient(135deg, #151c33, #0d1326);
  color: #fff; align-items: center; padding: 0 16px;
  z-index: 99; box-shadow: 0 2px 14px rgba(8, 12, 26, 0.35);
}
.hamburger {
  background: none; border: none; color: #fff; font-size: 20px;
  cursor: pointer; padding: 6px 10px; margin-right: 12px;
}
.mobile-title { font-size: 16px; font-weight: 700; letter-spacing: 0.2px; }
.sidebar-overlay {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10, 14, 28, 0.55); z-index: 98;
}

@media (max-width: 768px) {
  .mobile-header { display: flex; }
  .sidebar-overlay.active { display: block; }

  .sidebar {
    transform: translateX(-100%); transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    width: 268px;
    padding-top: 0;
    display: block !important;
    overflow-y: auto !important;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    box-shadow: none;
  }
  .sidebar.open { transform: translateX(0); box-shadow: 18px 0 48px -18px rgba(5, 10, 30, 0.55); }

  .sidebar .logo { padding: 62px 14px 14px; display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; width: 100%; box-sizing: border-box; }
  .sidebar .logo > div { width: 100%; text-align: center; }
  .sidebar .logo-icon { font-size: 28px; }
  .sidebar .logo-title { font-size: 11px; white-space: normal; line-height: 1.3; word-break: break-all; width: 100%; display: block !important; visibility: visible !important; opacity: 1 !important; color: #fff !important; }
  .sidebar .logo-sub { font-size: 10px; display: block !important; color: #7d87a3 !important; }
  .sidebar .nav { padding: 8px 8px; display: block; overflow: visible; flex: none; }
  .sidebar .nav-item { padding: 9px 13px; font-size: 13px; margin-bottom: 1px; }
  .sidebar .sidebar-footer { padding: 10px 12px 30px; display: block; }
  .sidebar .countdown-mini { font-size: 11px; }
  .sidebar .countdown-mini strong { font-size: 15px; }
  .sidebar .user-info { font-size: 11px; flex-wrap: wrap; gap: 4px; display: flex; }

  .main { margin-left: 0; padding: 70px 14px 20px; }

  .page-header h1 { font-size: 18px; }
  .card { padding: 14px; }
  .hero-card { padding: 20px 16px; flex-direction: column; gap: 14px; align-items: flex-start; }
  .hero-days { font-size: 44px; }
  .hero-right { gap: 10px; width: 100%; justify-content: space-between; }
  .hero-stat { padding: 10px 12px; flex: 1; }
  .hero-num { font-size: 21px; }
}

/* ============ 成绩分析 · 网格卡片 ============ */
.school-grid { display: flex !important; flex-wrap: wrap !important; gap: 14px !important; }
.school-card {
  flex: 1 1 220px !important;
  max-width: 280px !important;
  min-width: 200px !important;
  border-radius: 14px !important;
  padding: 18px !important;
  border: 1px solid var(--border) !important;
  background: var(--card) !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 10px !important;
  box-shadow: var(--shadow-sm) !important;
  transition: transform 0.18s, box-shadow 0.18s !important;
}
.school-card:hover { transform: translateY(-3px) !important; box-shadow: var(--shadow-md) !important; }
.school-card.above { border-left: 4px solid #10b981 !important; background: linear-gradient(135deg, #f0fbf6 0%, #fff 100%) !important; }
.school-card.below { border-left: 4px solid #e8890c !important; background: linear-gradient(135deg, #fffaf0 0%, #fff 100%) !important; }
.school-card-name { font-weight: 600; font-size: 15px; color: var(--text); line-height: 1.4; }
.school-card-note { font-size: 12px; color: var(--text-muted); background: var(--surface-deep); padding: 3px 9px; border-radius: 6px; display: inline-block; width: fit-content; }
.school-card-total { font-size: 26px; font-weight: 700; color: var(--text); font-variant-numeric: tabular-nums; }
.school-card-total small { font-size: 13px; font-weight: 400; color: var(--text-muted); }
.school-card-diff { font-size: 14px; font-weight: 600; padding: 4px 11px; border-radius: 8px; display: inline-block; width: fit-content; font-variant-numeric: tabular-nums; }
.school-card.above .school-card-diff { color: #0b8a61; background: #d5f5e6; }
.school-card.below .school-card-diff { color: #b06a05; background: #fdeecb; }
.school-card-actions { display: flex; gap: 8px; margin-top: auto; }
.school-card-actions button {
  flex: 1; padding: 6px 10px; font-size: 12px; border: 1px solid var(--border-strong);
  background: var(--card); border-radius: 8px; cursor: pointer; color: var(--text-muted);
  font-family: inherit; transition: all 0.14s;
}
.school-card-actions button:hover { background: var(--surface-deep); border-color: #b9c1d6; }
.school-card-actions .del { color: var(--danger); border-color: #f3c2c4; }

.school-card-drag {
  font-size: 11px; color: var(--text-faint); text-align: center;
  padding: 2px 0; user-select: none;
}
.drag-handle {
  display: inline-block; cursor: grab; padding: 0 3px;
  font-size: 14px; color: var(--text-muted); user-select: none; line-height: 1;
}
.drag-handle:active { cursor: grabbing; }
.drag-tip { letter-spacing: 0; }
.school-card.drag-over { border: 2px dashed var(--primary) !important; transform: scale(1.02); }

.score-filter {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
  padding: 10px 14px; background: var(--surface-deep); border-radius: 10px;
  border: 1px solid var(--border);
}
.score-filter label { font-size: 13px; color: var(--text-muted); }
.score-filter select {
  padding: 5px 10px; border: 1px solid var(--border-strong); border-radius: 8px;
  font-size: 13px; background: var(--card); color: var(--text); font-family: inherit;
}
.score-count { font-size: 12px; color: var(--text-faint); margin-left: auto; }

.score-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.score-card {
  border-radius: 12px; padding: 16px;
  border: 1px solid var(--border);
  background: var(--card);
  display: flex; flex-direction: column; gap: 10px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s, box-shadow 0.18s;
}
.score-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.score-card-head { display: flex; justify-content: space-between; align-items: center; }
.score-card-exam { font-weight: 600; font-size: 14px; color: var(--text); }
.score-card-date { font-size: 12px; color: var(--text-faint); }
.score-card-total { font-size: 32px; font-weight: 800; color: var(--primary); font-variant-numeric: tabular-nums; letter-spacing: -0.5px; }
.score-card-total small { font-size: 14px; font-weight: 400; color: var(--text-muted); }
.score-card-subs { display: flex; flex-wrap: wrap; gap: 5px; }
.score-sub-tag { font-size: 11px; padding: 2px 8px; background: var(--surface-deep); border-radius: 6px; color: var(--text-muted); }
.score-sub-tag.highlight { background: var(--primary-light); color: var(--primary-dark); font-weight: 600; }
.score-card-actions { display: flex; gap: 8px; margin-top: auto; }
.score-card-actions button {
  flex: 1; padding: 6px 10px; font-size: 12px; border: 1px solid var(--border-strong);
  background: var(--card); border-radius: 8px; cursor: pointer; color: var(--text-muted);
  font-family: inherit; transition: all 0.14s;
}
.score-card-actions button:hover { background: var(--surface-deep); border-color: #b9c1d6; }
.score-card-actions .del { color: var(--danger); border-color: #f3c2c4; }

.score-card-drag, .school-card-drag {
  font-size: 11px; color: var(--text-faint); text-align: center;
  padding: 2px 0; user-select: none;
  display: flex; justify-content: center; align-items: center; gap: 8px;
}
.move-btn {
  display: inline-block; cursor: pointer; padding: 0 6px;
  font-size: 14px; font-weight: bold; color: var(--primary);
  border-radius: 5px; user-select: none;
}
.move-btn:hover { background: var(--primary-light); color: var(--primary-dark); }
.score-card, .school-card { user-select: none; -webkit-user-select: none; -moz-user-select: none; }
.score-card.drag-over { border: 2px dashed var(--primary) !important; transform: scale(1.02); }

.card-header-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.card-header-row h3 { margin: 0; }
.card-header-left { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.card-header-left h3 { white-space: nowrap; }
.card-header-left .btn { white-space: nowrap; flex-shrink: 0; }
.score-filter-inline { display: flex; align-items: center; gap: 8px; }
.score-filter-inline select {
  padding: 5px 10px; border: 1px solid var(--border-strong); border-radius: 8px;
  font-size: 13px; background: var(--card); color: var(--text); font-family: inherit;
}
.score-filter-inline .score-count { font-size: 12px; color: var(--text-faint); }

.trend-checkboxes { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.trend-checkbox {
  display: flex; align-items: center; gap: 5px;
  font-size: 12px; color: var(--text-muted); cursor: pointer;
  padding: 4px 10px; background: var(--surface-deep); border-radius: 7px;
  border: 1px solid transparent; transition: all 0.14s;
}
.trend-checkbox input { cursor: pointer; accent-color: var(--primary); }
.trend-checkbox:hover { background: #e9ebf4; }

/* ============ 中考资料 · 文章 ============ */
.article-list { display: flex; flex-direction: column; gap: 12px; }
.article-item {
  padding: 18px 20px; background: var(--card); border-radius: 14px;
  border: 1px solid var(--border); cursor: pointer;
  transition: all 0.18s ease; box-shadow: var(--shadow-sm);
}
.article-item:hover { border-color: #b9c6f7; box-shadow: 0 6px 20px -8px rgba(79, 99, 242, 0.28); transform: translateY(-2px); }
.article-item-title { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.article-item-summary { font-size: 13px; color: var(--text-muted); line-height: 1.55; margin-bottom: 8px; }
.article-item-meta { font-size: 12px; color: var(--text-faint); display: flex; justify-content: space-between; align-items: center; }
.article-item-actions { display: flex; gap: 8px; }
.article-item-actions button {
  background: none; border: none; cursor: pointer; font-size: 13px;
  padding: 3px 9px; border-radius: 6px; color: var(--text-faint); transition: all 0.14s;
}
.article-item-actions button:hover { background: var(--surface-deep); }
.article-item-actions .del:hover { color: var(--danger); background: var(--danger-light); }

.article-content { font-size: 15px; line-height: 1.8; color: var(--text); }
.article-content img { max-width: 100%; height: auto; border-radius: 10px; margin: 12px 0; }
.article-content p { margin: 8px 0; }

.editor-toolbar { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.editor-toolbar .btn { padding: 4px 11px; font-size: 13px; }
.article-editor {
  min-height: 300px; padding: 12px 14px; border: 1px solid var(--border-strong);
  border-radius: 10px; font-size: 14px; line-height: 1.6; outline: none;
  background: var(--card); color: var(--text); transition: border-color 0.15s, box-shadow 0.15s;
}
.article-editor:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-tint); }
.article-editor:empty:before { content: attr(placeholder); color: #9aa3b5; }
.article-editor img { max-width: 100%; height: auto; border-radius: 10px; margin: 8px 0; }

/* ============ 小屏 ============ */
@media (max-width: 480px) {
  .school-card { flex: 1 1 45% !important; min-width: 45% !important; max-width: 48% !important; }
  .score-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .btn { padding: 7px 12px; font-size: 12px; }
  .input { padding: 7px 10px; font-size: 13px; }
  .toolbar { gap: 6px; }

  .table-wrap, .card > table, .card > .table-wrap {
    display: block; overflow-x: auto; -webkit-overflow-scrolling: touch;
  }
  table { width: 100%; font-size: 12px; }
  th, td { padding: 8px 6px; white-space: nowrap; }

  .stats-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 10px; }
  .stat-card { padding: 12px; }
  .stat-num { font-size: 20px; }

  .form-row { flex-direction: column; gap: 8px; align-items: flex-start; }
  .form-group { margin-bottom: 10px; }
  .form-group label { font-size: 13px; }

  .auth-box { width: 92%; max-width: 380px; padding: 16px 16px !important; }
  .auth-title { font-size: 17px !important; margin-bottom: 12px !important; }
  .auth-brand { margin-bottom: 12px !important; }
  .auth-logo { width: 48px !important; height: 48px !important; }
  .auth-subtitle { font-size: 12px !important; margin-bottom: 12px !important; }
  .auth-countdown { padding: 8px 12px !important; margin-bottom: 12px !important; font-size: 13px !important; }
  .auth-tabs { margin-bottom: 12px !important; gap: 4px !important; }
  .auth-tab { padding: 8px 16px !important; font-size: 14px !important; }
  .auth-form { gap: 12px !important; }
  .auth-input { padding: 10px 14px 10px 40px !important; font-size: 14px !important; }
  .auth-btn { padding: 10px 16px !important; font-size: 15px !important; }
  .auth-hint { font-size: 11px !important; margin-top: 10px !important; line-height: 1.5 !important; }
  .invite-code-grid { gap: 6px !important; margin: 8px 0 !important; }
  .invite-cell { height: 40px !important; font-size: 18px !important; }

  .modal-content { width: 92%; max-width: 400px; max-height: 85vh; overflow-y: auto; }

  .announcement-bar { font-size: 12px; padding: 7px 11px; }

  .user-info { font-size: 12px; }
  .pwd-btn, .logout-btn { padding: 3px 6px; font-size: 10px; }

  .counter-grid { grid-template-columns: repeat(2, 1fr) !important; }

  .milestone-list { padding-left: 20px; }

  .goal-item { flex-direction: column; gap: 8px; align-items: flex-start; }
  .goal-progress { width: 100%; }

  .trend-checkboxes { display: grid !important; grid-template-columns: repeat(4, 1fr) !important; gap: 6px !important; justify-content: flex-start !important; }
  .trend-checkbox { font-size: 11px !important; padding: 3px 6px !important; justify-content: center !important; }
  .score-count { grid-column: 1 / -1 !important; text-align: right !important; font-size: 11px !important; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr !important; }
  .counter-grid { grid-template-columns: 1fr !important; }
  .hero-right { flex-direction: column; gap: 8px; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .toolbar .btn, .toolbar .input { width: 100%; }
}

/* ============ 动效可关闭（无障碍） ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   设计 Token 速查（详见项目内 DESIGN.md）
   主色 #4f63f2（靛蓝）· 辅助 #22b8a0（青绿）· 紫罗兰 #8b5cf6
   文字 #1b2130 / 次要 #5c6577 / 弱化 #8a93a6
   背景 #f4f5fa · 卡片 #fff · 边框 #e7e9f2
   圆角 卡片16 / 控件10-12 · 数字一律 tabular-nums
   ============================================================ */



/* ============================================================
   深色主题「夜读 Night Focus」
   html[data-theme="dark"] 由 theme.js / 内联防闪脚本设置
   ============================================================ */
html[data-theme="dark"] {
  color-scheme: dark;
  /* 色彩 Token（提亮前景保证深底对比度） */
  --primary: #7c8cff;
  --primary-dark: #98a5ff;
  --primary-deep: #4f63f2;
  --primary-light: #252d52;
  --primary-tint: rgba(124, 140, 255, 0.16);
  --accent: #2fd4b8;
  --success: #3ecf9a;
  --success-light: #123529;
  --warning: #f2a33c;
  --warning-light: #3a2c12;
  --danger: #ff6b70;
  --danger-light: #3d1d20;
  --purple: #a78bfa;
  /* 中性色 */
  --bg: #0d1120;
  --card: #161c30;
  --text: #e8ebf5;
  --text-muted: #9aa3ba;
  --text-faint: #67718c;
  --border: #242c47;
  --border-strong: #323c5e;
  /* 表面层 */
  --surface-soft: #1a2138;
  --surface-deep: #202842;
  --surface-hover: #1d2439;
  /* 投影（深色下加深） */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.32), 0 2px 8px -4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.32), 0 10px 28px -12px rgba(0, 0, 0, 0.55);
  --shadow-primary: 0 6px 18px -6px rgba(79, 99, 242, 0.55);
}

/* 全局基底 */
html[data-theme="dark"] body {
  background:
    radial-gradient(900px 420px at 85% -8%, rgba(79, 99, 242, 0.13), transparent 62%),
    radial-gradient(700px 380px at -10% 12%, rgba(34, 184, 160, 0.08), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}
html[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #333d5e; }
html[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: #414d75; }
html[data-theme="dark"] ::placeholder,
html[data-theme="dark"] ::-webkit-input-placeholder { color: #67718c; }
html[data-theme="dark"] ::-moz-placeholder { color: #67718c; opacity: 1; }

/* 悬停边框 / 次级元素 */
html[data-theme="dark"] .task-item:hover,
html[data-theme="dark"] .goal-item:hover { border-color: #3a4568; }
html[data-theme="dark"] .input:hover { border-color: #3a4568; }
html[data-theme="dark"] .overview-card:hover { border-color: #3a4568; }
html[data-theme="dark"] .task-locked { background: #141929 !important; }
html[data-theme="dark"] .record-locked { background: #151b2e !important; }
html[data-theme="dark"] .task-check { border-color: #4a5578; }
html[data-theme="dark"] .task-drag-handle { color: #67718c; }
html[data-theme="dark"] .btn-danger:hover { background: #f0565b; }

/* 状态色组合（深底上换浅字深底） */
html[data-theme="dark"] .weak-rank.rn { background: #67718c; }
html[data-theme="dark"] .weak-tag.warn { background: #3a2f10; color: #f2c069; }
html[data-theme="dark"] .user-tag.readonly { color: #f2c069; }
html[data-theme="dark"] .user-item.banned { background: #2a1b1e; }

/* 节点/测试提醒卡（浅色渐变 → 深色渐变） */
html[data-theme="dark"] .alert-item.urgent { background: #2a1b1e; }
html[data-theme="dark"] .alert-item.soon { background: #2a2416; }
html[data-theme="dark"] .test-card { background: linear-gradient(135deg, #1c2340 0%, #20294a 100%); border-color: #2c3760; }
html[data-theme="dark"] .test-card.error { background: linear-gradient(135deg, #241f3e 0%, #2a2450 100%); border-color: #3a3260; }
html[data-theme="dark"] .test-card.done { background: linear-gradient(135deg, #16302a 0%, #1a3630 100%); border-color: #235446; }

/* 公告滚动栏（米黄 → 暗金） */
html[data-theme="dark"] .announcement-bar { background: linear-gradient(135deg, #2f2610, #3a2f14); border-color: #574618; box-shadow: none; }
html[data-theme="dark"] .announcement-scroll { color: #e8c777; }
html[data-theme="dark"] .announcement-close { background: rgba(232, 199, 119, 0.12); color: #e8c777; }
html[data-theme="dark"] .announcement-close:hover { background: rgba(232, 199, 119, 0.22); }

/* 成绩分析卡片 */
html[data-theme="dark"] .school-card.above { background: linear-gradient(135deg, #14251d 0%, #161c30 100%) !important; border-left-color: #10b981 !important; }
html[data-theme="dark"] .school-card.below { background: linear-gradient(135deg, #2a2312 0%, #161c30 100%) !important; }
html[data-theme="dark"] .school-card.above .school-card-diff { color: #3ecf9a; background: #123529; }
html[data-theme="dark"] .school-card.below .school-card-diff { color: #f2a33c; background: #3a2c12; }
html[data-theme="dark"] .calc-result { border-color: #2c3760; }

/* 时间线 */
html[data-theme="dark"] .timeline::before { background: linear-gradient(180deg, #3a4568, var(--border)); }
html[data-theme="dark"] .tl-item::before { border-color: var(--card); }
html[data-theme="dark"] .tl-item.past::before { background: #67718c; box-shadow: 0 0 0 2px #3a4568; }

/* 表格 / 存储 / Toast / 弹窗 */
html[data-theme="dark"] .score-table tbody tr:hover td { background: #1a2138; }
html[data-theme="dark"] .storage-bar-wrap { background: #242c47; }
html[data-theme="dark"] .toast { background: #3a4363; box-shadow: 0 12px 32px -8px rgba(0, 0, 0, 0.6); }
html[data-theme="dark"] .modal { box-shadow: 0 24px 70px -18px rgba(0, 0, 0, 0.75); }

/* 登录层（白卡 → 深色卡，背景光斑保持） */
html[data-theme="dark"] .auth-box { background: rgba(22, 28, 48, 0.97); border-color: rgba(255, 255, 255, 0.1); }
html[data-theme="dark"] .auth-tab.active { background: #2a3355; color: #98a5ff; }
html[data-theme="dark"] .auth-btn-guest:hover { background: #26304f; }

/* ============ 主题切换（三段选择控件） ============ */
.theme-seg {
  display: flex; gap: 4px; margin-top: 12px; padding: 4px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
}
.theme-seg-btn {
  flex: 1; padding: 6px 0; background: transparent; border: none;
  color: var(--sidebar-text); font-size: 11px; font-weight: 600;
  border-radius: 7px; cursor: pointer; font-family: inherit;
  transition: all 0.15s; white-space: nowrap; line-height: 1.4;
}
.theme-seg-btn:hover { color: #eef1fa; background: rgba(255, 255, 255, 0.07); }
.theme-seg-btn.active {
  background: linear-gradient(135deg, #4f63f2, #6d5df6);
  color: #fff;
  box-shadow: 0 4px 10px -4px rgba(79, 99, 242, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.theme-seg-btn:focus-visible { outline-offset: 0; }

/* 移动端顶栏切换按钮 */
.theme-toggle-mobile {
  background: rgba(255, 255, 255, 0.1); border: none; color: #fff;
  font-size: 17px; cursor: pointer; padding: 6px 10px; border-radius: 8px;
  margin-left: auto; flex-shrink: 0; transition: background 0.15s; font-family: inherit;
}
.theme-toggle-mobile:hover { background: rgba(255, 255, 255, 0.2); }



/* ============================================================
   v31 登录界面升级「Clear Sign-in」
   仅重构 .auth-* 登录层视觉与新增交互样式；不影响应用内其他视图。
   依赖 v30 设计 Token。新增能力：
   - 分段式切换控件（滑动指示器）
   - 带图标输入框 / 大写锁定提示 / 密码强度条 / 两次一致性提示
   - 邀请码 6 格分格输入
   - 登录锁定倒计时状态 / 错误提示框
   - 登录页主题切换按钮
   - POW 人机验证按钮改 class 驱动（is-working / is-ok）
   ============================================================ */

/* ---------- 卡片与品牌区 ---------- */
.auth-box {
  border-radius: var(--radius-lg, 22px);
  padding: 34px 32px 28px;
  animation: authCardIn 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes authCardIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.auth-brand { margin-bottom: 20px; }
.auth-logo {
  width: 68px; height: 68px; font-size: 28px; border-radius: 22px;
  margin: 0 auto 14px;
  position: relative;
}
.auth-logo::after {
  content: ''; position: absolute; inset: -6px;
  border: 1.5px solid rgba(255, 255, 255, 0.16);
  border-radius: 27px; pointer-events: none;
}
.auth-title { font-size: 19px; margin-bottom: 6px; }
.auth-sub {
  font-size: 12.5px; color: var(--text-muted); letter-spacing: 1px;
  margin: 0 0 4px;
}

/* ---------- 登录页主题切换按钮 ---------- */
.auth-theme-btn {
  position: absolute; top: 18px; right: 18px;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  color: #fff; font-size: 16px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.16s, transform 0.16s;
  z-index: 2;
}
.auth-theme-btn:hover { background: rgba(255, 255, 255, 0.24); transform: translateY(-1px); }
.auth-theme-btn:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

/* ---------- 分段式切换（滑块） ---------- */
.auth-seg {
  position: relative; display: flex;
  background: var(--surface-deep); border: 1px solid var(--border);
  border-radius: 12px; padding: 4px; margin-bottom: 18px;
}
.auth-seg-slider {
  position: absolute; top: 4px; bottom: 4px; left: 4px;
  width: calc(50% - 4px);
  background: var(--card);
  border-radius: 9px;
  box-shadow: 0 2px 10px -2px rgba(23, 30, 55, 0.22);
  transition: transform 0.24s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}
.auth-seg .auth-tab {
  position: relative; z-index: 1; flex: 1; padding: 9px;
  border: none; background: transparent; cursor: pointer;
  font-size: 14px; font-weight: 600; color: var(--text-muted);
  border-radius: 9px; transition: color 0.2s; font-family: inherit;
}
.auth-seg .auth-tab.active { background: transparent; box-shadow: none; color: var(--primary-dark); }

/* ---------- 带图标输入框 ---------- */
.auth-field { position: relative; }
.auth-field-icon {
  position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
  font-size: 15px; opacity: 0.65; pointer-events: none; z-index: 2;
}
.auth-field .auth-input { width: 100%; padding-left: 40px; }
.auth-field .pwd-toggle { right: 12px; }
.auth-input { padding: 12.5px 14px; }

/* 大写锁定提示 */
.caps-hint {
  display: none; position: absolute; right: 2px; top: calc(100% + 2px);
  font-size: 11px; color: var(--warning); font-weight: 600;
}
.caps-hint.show { display: block; }

/* ---------- 错误提示框（锁定倒计时复用） ---------- */
.auth-error {
  display: none; min-height: 0; margin-bottom: 14px;
  padding: 10px 12px; border-radius: 10px; text-align: left;
  background: var(--danger-light); color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 28%, transparent);
  font-size: 13px; line-height: 1.5; word-break: break-all;
}
.auth-error:not(:empty) { display: block; animation: authShake 0.3s ease; }
@keyframes authShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); } 75% { transform: translateX(4px); }
}

/* ---------- 登录按钮锁定态 ---------- */
.auth-btn.is-locked, .auth-btn:disabled {
  opacity: 0.55; cursor: not-allowed;
  transform: none; box-shadow: none;
}

/* ---------- 或分隔线 ---------- */
.auth-divider {
  display: flex; align-items: center; gap: 12px;
  margin: 4px 0 -2px; color: var(--text-faint);
  font-size: 12px; user-select: none;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* ---------- 密码强度条 ---------- */
.strength-bar {
  height: 4px; border-radius: 2px; margin: -4px 2px 0;
  background: var(--surface-deep); overflow: hidden;
}
.strength-bar span {
  display: block; height: 100%; width: 0;
  border-radius: 2px; transition: width 0.25s, background 0.25s;
}
.strength-bar span.s1 { width: 33%; background: var(--danger); }
.strength-bar span.s2 { width: 66%; background: var(--warning); }
.strength-bar span.s3 { width: 100%; background: var(--success); }
.strength-text { margin: 2px 2px 0; font-size: 11.5px; color: var(--text-faint); text-align: left; }
.strength-text.bad { color: var(--danger); }

/* 两次密码一致性 */
.match-hint { font-size: 11.5px; text-align: left; min-height: 14px; margin: -4px 2px 0; }
.match-hint.ok { color: var(--success); }
.match-hint.bad { color: var(--danger); }

/* ---------- 邀请码 6 格输入 ---------- */
.invite-label {
  display: block; text-align: left; font-size: 12.5px;
  color: var(--text-muted); margin: 2px 2px 6px; font-weight: 600;
}
.invite-cells {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px;
}
.invite-cell {
  height: 46px; text-align: center; font-size: 18px; font-weight: 700;
  color: var(--text); text-transform: uppercase;
  border: 1.5px solid var(--border-strong); border-radius: 10px;
  background: var(--card); outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  font-family: inherit;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}
.invite-cell:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-tint);
}
.invite-cell.filled { border-color: var(--primary); }

/* ---------- POW 人机验证（class 驱动） ---------- */
.pow-verify { margin: 2px 0; }
.pow-btn {
  width: 100%; padding: 11px;
  background: var(--surface-soft);
  border: 1.5px dashed var(--border-strong);
  border-radius: 10px; cursor: pointer;
  font-size: 13.5px; color: var(--text-muted);
  font-family: inherit; font-weight: 600;
  transition: all 0.16s;
}
.pow-btn:hover:not(:disabled) { border-color: var(--primary); color: var(--primary-dark); }
.pow-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.pow-btn.is-working { opacity: 0.6; cursor: wait; }
.pow-btn.is-ok {
  background: var(--success-light); border: 1.5px solid color-mix(in srgb, var(--success) 45%, transparent);
  color: var(--success); cursor: default;
}
.pow-status { margin-top: 8px; font-size: 12.5px; color: var(--text-muted); }
.pow-status.ok { color: var(--success); }
.pow-status.err { color: var(--danger); }

/* ---------- 底部提示 ---------- */
.auth-hint { margin-top: 18px; }
.auth-hint a.auth-link { color: var(--primary); text-decoration: underline; }
.auth-hint #emailCopiedTip { color: var(--success); font-size: 12px; }

/* ---------- 深色主题覆盖（Night Focus） ---------- */
html[data-theme="dark"] .auth-box {
  background: rgba(22, 28, 48, 0.97);
  border-color: rgba(255, 255, 255, 0.1);
}
html[data-theme="dark"] .auth-seg { background: #202842; border-color: #242c47; }
html[data-theme="dark"] .auth-seg-slider { background: #2a3355; box-shadow: 0 2px 10px -2px rgba(0, 0, 0, 0.5); }
html[data-theme="dark"] .auth-seg .auth-tab.active { color: #98a5ff; }
html[data-theme="dark"] .invite-cell { background: #1a2138; }
html[data-theme="dark"] .pow-btn { background: #1a2138; }
html[data-theme="dark"] .auth-error {
  background: rgba(229, 72, 77, 0.14);
  border-color: rgba(255, 107, 112, 0.35);
  color: #ff6b70;
}
html[data-theme="dark"] .auth-divider::before,
html[data-theme="dark"] .auth-divider::after { background: #242c47; }

/* ---------- 移动端 375px ---------- */
@media (max-width: 480px) {
  .auth-box { width: 92%; padding: 26px 18px 22px; }
  .auth-title { font-size: 17px; }
  .invite-cells { gap: 4px; }
  .invite-cell { height: 40px; font-size: 14px; border-radius: 8px; }
  .auth-theme-btn { top: 14px; right: 14px; }
}

/* ---------- 超小屏 320px ---------- */
@media (max-width: 360px) {
  .invite-cells { gap: 3px; }
  .invite-cell { height: 36px; font-size: 13px; }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .auth-box { animation: none; }
  .auth-seg-slider { transition: none; }
  .auth-error:not(:empty) { animation: none; }
  .strength-bar span { transition: none; }
}


/* ------------------------------------------------------------
   v31.1 · 登录页中考倒计时芯片
   ------------------------------------------------------------ */
.auth-countdown {
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin: 2px 0 16px;
  padding: 8px 14px;
  background: linear-gradient(135deg, rgba(79, 99, 242, 0.08), rgba(139, 92, 246, 0.10));
  border: 1px solid rgba(79, 99, 242, 0.22);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-muted);
}
.auth-countdown-label { letter-spacing: 0.5px; }
.auth-countdown-num {
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.auth-countdown-unit { font-size: 12px; color: var(--text-faint); }
.auth-countdown-date { font-size: 12px; color: var(--text-faint); font-variant-numeric: tabular-nums; }
.auth-countdown.is-today .auth-countdown-num { color: var(--danger); }

html[data-theme="dark"] .auth-countdown {
  background: linear-gradient(135deg, rgba(124, 140, 255, 0.14), rgba(139, 92, 246, 0.16));
  border-color: rgba(124, 140, 255, 0.28);
}
html[data-theme="dark"] .auth-countdown-num { color: var(--primary); }

@media (max-width: 420px) {
  .auth-countdown { margin: 0 0 12px; padding: 7px 12px; }
  .auth-countdown-num { font-size: 19px; }
}

/* ============ 学习记录：各学科累计时长柱状图（美化） ============ */
.record-chart-card {
  width: 100%; box-sizing: border-box;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 16px 12px;
  box-shadow: 0 4px 18px -8px rgba(30, 41, 80, 0.12);
}
html[data-theme="dark"] .record-chart-card { box-shadow: 0 4px 18px -8px rgba(0, 0, 0, 0.55); }
.record-chart-title {
  font-weight: 700; font-size: 14px; color: var(--text);
  display: flex; align-items: center; gap: 6px; margin-bottom: 14px;
}
.record-chart-body {
  display: flex; align-items: flex-end; gap: 8px;
  padding: 2px 6px 6px; overflow-x: auto;
  border-bottom: 1px solid var(--border);
}
.rc-col {
  flex: 1 1 0; min-width: 48px; max-width: 80px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  overflow: visible;
}
.rc-val {
  font-size: 11px; font-weight: 600; color: var(--text);
  background: var(--surface-soft);
  padding: 2px 8px; border-radius: 9px; white-space: nowrap;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.07);
  transition: filter 0.18s;
}
.rc-bar {
  width: 70%; max-width: 52px;
  border-radius: 7px 7px 3px 3px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), 0 3px 7px -3px rgba(0, 0, 0, 0.22);
  transition: filter 0.18s, transform 0.18s;
}
.rc-col:hover .rc-bar { filter: brightness(1.1) saturate(1.12); }
.rc-col:hover .rc-val { filter: brightness(1.05); }
.rc-label {
  font-size: 12px; font-weight: 500; color: var(--text-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%;
  transition: color 0.15s;
}
.rc-col:hover .rc-label { color: var(--primary); }