/* ============================================================
   医护备考小站 · 全站样式 v2.0
   设计系统：主色 #1E3A8A + 辅助 #10B981
   ============================================================ */

/* ============================================================
   1. 设计令牌
   ============================================================ */
:root {
    /* 主色 */
    --color-primary: #1E3A8A;
    --color-primary-hover: #1E40AF;
    --color-primary-active: #172554;
    --color-primary-light: #EEF2FF;
    --color-primary-lighter: #F5F7FF;

    /* 辅助绿 */
    --color-success: #10B981;
    --color-success-dark: #059669;
    --color-success-light: #D1FAE5;

    /* 警告橙 */
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;

    /* 危险红 */
    --color-danger: #EF4444;
    --color-danger-light: #FEE2E2;

    /* 中性 */
    --color-text: #111827;
    --color-text-secondary: #6B7280;
    --color-text-tertiary: #9CA3AF;
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;
    --color-bg: #F9FAFB;
    --color-bg-elevated: #FFFFFF;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                   "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* 过渡 */
    --transition: 0.2s ease;
}

/* ============================================================
   2. 基础重置
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }

body {
    font-family: var(--font-family);
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    -webkit-font-smoothing: antialiased;
}

#app {
    width: 100%;
    max-width: 500px;
    min-height: 100vh;
    position: relative;
    background: var(--color-bg);
}

.num, [data-tabular] {
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}

/* ============================================================
   3. 页面容器
   ============================================================ */
.page { display: none; }
.page.active { display: block; padding-bottom: 70px; }
#page-login, #page-track, #page-level { padding-bottom: 0; }

.page-body { padding: 16px; }

/* ============================================================
   4. 按钮
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    user-select: none;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-outline {
    background: #fff;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary-light); }

.btn-success {
    background: var(--color-success);
    color: #fff;
    border: 1.5px solid var(--color-success);
}
.btn-success:hover { background: var(--color-success-dark); }

.btn-sm { padding: 7px 14px; font-size: 13px; border-radius: var(--radius-sm); }
.btn-lg { width: 100%; padding: 13px 20px; font-size: 16px; }

.btn-logout-profile {
    background: #fff;
    color: var(--color-danger);
    border: 2px solid var(--color-danger);
    width: 100%;
    margin-top: 16px;
    padding: 13px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
}
.btn-logout-profile:hover { background: var(--color-danger); color: #fff; }

/* ============================================================
   5. 卡片
   ============================================================ */
.card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.card-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.card-header-row .card-title { margin-bottom: 0; }
.card-sub { font-size: 12px; color: var(--color-text-tertiary); }

.section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    padding: 4px 4px 8px;
}

.empty-card {
    text-align: center;
    color: var(--color-text-tertiary);
    padding: 40px 20px;
    font-size: 14px;
}
.empty-msg {
    text-align: center;
    color: var(--color-text-tertiary);
    padding: 20px;
    font-size: 13px;
}

.hidden { display: none !important; }

/* ============================================================
   6. 顶栏
   ============================================================ */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--color-primary);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
}

.topbar-simple {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: #fff;
    color: var(--color-text);
    font-size: 16px;
    font-weight: 600;
    border-bottom: 1px solid var(--color-border);
}

.back-btn {
    background: none;
    border: none;
    color: inherit;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    padding: 4px 8px;
    font-weight: 400;
}

.stats-bar {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 10px 16px;
    background: var(--color-primary-light);
    font-size: 13px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border-light);
}
.stats-bar strong { color: var(--color-primary); font-size: 15px; }

/* ============================================================
   7. 表单
   ============================================================ */
.form-group {
    margin-bottom: 14px;
    text-align: left;
}
.form-group label {
    display: block;
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-input,
.form-textarea,
.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition);
    background: #fff;
    color: var(--color-text);
}
.form-input:focus,
.form-textarea:focus,
.form-group input:focus,
.form-group select:focus {
    border-color: var(--color-primary);
}

.form-textarea {
    min-height: 70px;
    resize: vertical;
    line-height: 1.6;
}

.form-row {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.form-input-3 { flex: 1; min-width: 90px; }
.form-input-5 { flex: 1; min-width: 80px; }

.input-inline,
.select-inline {
    padding: 8px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    background: #fff;
    outline: none;
}
.input-inline:focus,
.select-inline:focus { border-color: var(--color-primary); }

.redeem-input {
    width: 130px;
    padding: 6px 10px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    outline: none;
}
.redeem-input:focus { border-color: var(--color-primary); }

.msg {
    margin-top: 12px;
    font-size: 13px;
    min-height: 20px;
    text-align: center;
}
.msg.error { color: var(--color-danger); }
.msg.success { color: var(--color-success); }

/* ============================================================
   8. 登录页
   ============================================================ */
.login-wrap {
    min-height: 100vh;
    padding: 40px 20px 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: linear-gradient(180deg, #fff 0%, var(--color-primary-lighter) 100%);
}

.login-brand {
    text-align: center;
    margin-bottom: 32px;
}
.login-logo {
    width: 88px;
    height: 88px;
    border-radius: 20px;
    margin: 0 auto 16px;
    display: block;
    box-shadow: var(--shadow-md);
    background: #fff;
    object-fit: contain;
}
.login-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 6px;
    letter-spacing: 1px;
}
.login-subtitle {
    font-size: 13px;
    color: var(--color-text-secondary);
    letter-spacing: 2px;
}

.login-card {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 24px 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
}
.trial-tip {
    display: inline-block;
    padding: 8px 16px;
    background: linear-gradient(135deg, #FFF8E1, #FFFDE7);
    border: 1px dashed #FFD54F;
    border-radius: var(--radius-md);
    font-size: 12px;
    color: #B8860B;
    margin-bottom: 12px;
}
.trial-tip strong { color: var(--color-danger); }

.privacy-link {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-bottom: 12px;
}
.privacy-link a {
    color: var(--color-primary);
    text-decoration: none;
}

.version {
    font-size: 11px;
    color: var(--color-text-tertiary);
}

/* ============================================================
   9. 轨道/级别
   ============================================================ */
.track-list { padding: 16px; }

.track-card {
    border-radius: var(--radius-xl);
    padding: 28px 24px;
    margin-bottom: 14px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: transform var(--transition);
    box-shadow: var(--shadow-md);
}
.track-card:active { transform: scale(0.98); }
.track-card.medical {
    background: linear-gradient(135deg, #1E3A8A, #2563EB);
    color: #fff;
}
.track-card.nursing {
    background: linear-gradient(135deg, #059669, #10B981);
    color: #fff;
}
.track-icon { font-size: 44px; }
.track-title { font-size: 20px; font-weight: 700; }
.track-desc { font-size: 13px; opacity: 0.9; }

.level-list { padding: 8px 16px; }
.level-card {
    background: #fff;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 10px;
    cursor: pointer;
    text-align: center;
    transition: all var(--transition);
}
.level-card:active { transform: scale(0.98); }
.level-card.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}
.level-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

/* ============================================================
   10. 主菜单
   ============================================================ */
.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: linear-gradient(135deg, #1E3A8A, #10B981);
    color: #fff;
}
.mh-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}
.mh-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: #fff;
    padding: 3px;
    object-fit: contain;
}
.mh-info { display: flex; flex-direction: column; gap: 2px; }
.mh-greeting { font-size: 14px; color: #fff; }
.mh-greeting strong { font-weight: 700; }
.mh-sub { font-size: 11px; opacity: 0.85; }
.mh-right { display: flex; align-items: center; gap: 8px; }

.mh-vip-badge {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: var(--radius-xl);
    background: #FCD34D;
    color: #78350F;
    font-weight: 700;
    white-space: nowrap;
}
.mh-vip-badge.expired { background: var(--color-danger); color: #fff; }
.mh-vip-badge.free { background: rgba(255,255,255,0.25); color: #fff; }

.mh-logout {
    background: rgba(255,255,255,0.2);
    color: #fff;
    border: none;
    padding: 5px 12px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    cursor: pointer;
}

.menu-scroll {
    padding: 12px;
    min-height: calc(100vh - 76px);
}

/* 体验期提示 */
.trial-banner {
    margin-bottom: 12px;
    padding: 10px 14px;
    background: linear-gradient(135deg, #FFF8E1, #FFFDE7);
    border: 1px solid #FFD54F;
    border-radius: var(--radius-md);
    font-size: 13px;
    color: #7A5C00;
    line-height: 1.6;
}
.trial-banner strong { color: var(--color-danger); font-size: 15px; margin: 0 2px; }

/* 今日卡片 */
.today-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.today-card-left { flex: 1; }
.today-card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 10px;
}
.today-card-stats { display: flex; flex-direction: column; gap: 8px; }
.today-stat-line { display: flex; align-items: baseline; gap: 8px; }
.today-label { font-size: 12px; color: var(--color-text-tertiary); }
.today-value { font-size: 14px; color: var(--color-text); }
.today-value strong { font-size: 20px; color: var(--color-primary); font-weight: 700; }
.today-card-right {
    position: relative;
    width: 88px;
    height: 88px;
    flex-shrink: 0;
}
.today-ring { width: 100%; height: 100%; }
.today-ring .ring-fill { transition: stroke-dashoffset 0.6s ease; }
.ring-center-text {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 13px;
    font-weight: 700;
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
    pointer-events: none;
}

/* 学习路径 */
.study-plan-card {
    background: linear-gradient(135deg, #EEF2FF 0%, #F5F7FF 100%);
    border: 1px solid #C7D2FE;
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    margin-bottom: 12px;
}
.sp-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.sp-title { font-size: 13px; font-weight: 700; color: var(--color-primary); }
.sp-days { font-size: 12px; color: var(--color-text-secondary); }
.sp-days strong { color: var(--color-danger); font-size: 14px; }

.sp-progress-text {
    font-size: 13px;
    color: var(--color-text);
    margin-bottom: 6px;
}
.sp-progress-text strong { color: var(--color-primary); font-size: 15px; }
.sp-progress-bar {
    background: #E0E7FF;
    border-radius: var(--radius-xl);
    height: 8px;
    overflow: hidden;
    margin-bottom: 8px;
}
.sp-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    transition: width 0.4s, background 0.4s;
}
.sp-suggestions { display: flex; flex-direction: column; gap: 4px; }
.sp-suggestion {
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* 快捷入口 */
.quick-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}
.quick-item {
    position: relative;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 12px 4px 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
}
.quick-item:active { transform: scale(0.96); }
.quick-item:hover { box-shadow: var(--shadow-md); border-color: var(--color-primary-light); }

.quick-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}
.quick-icon svg { width: 22px; height: 22px; }

.qi-random  { background: #EEF2FF; color: #1E3A8A; }
.qi-filter  { background: #D1FAE5; color: #059669; }
.qi-real    { background: #FEF3C7; color: #D97706; }
.qi-exam    { background: #FEE2E2; color: #DC2626; }
.qi-wrong   { background: #FCE7F3; color: #DB2777; }
.qi-review  { background: #E0F2FE; color: #0284C7; }
.qi-fav     { background: #FEF9C3; color: #CA8A04; }
.qi-calendar{ background: #EDE9FE; color: #7C3AED; }
.qi-rank    { background: #FFEDD5; color: #EA580C; }
.qi-invite  { background: #F3E8FF; color: #9333EA; }
.qi-group   { background: #CFFAFE; color: #0891B2; }

.quick-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    line-height: 1.2;
}

.quick-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    background: var(--color-danger);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    line-height: 16px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(239, 68, 68, 0.4);
}

/* 考试倒计时 */
.countdown-row {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #EEF2FF, #F5F7FF);
    border-radius: var(--radius-lg);
    padding: 12px 16px;
    margin-bottom: 12px;
    cursor: pointer;
    border: 1px solid #C7D2FE;
}
.cr-label { font-size: 13px; color: var(--color-primary); font-weight: 600; }
.cr-days { font-size: 22px; font-weight: 800; color: var(--color-danger); }
.cr-unit { font-size: 13px; color: var(--color-text-secondary); }
.cr-hint { font-size: 11px; color: var(--color-text-tertiary); margin-left: auto; }

/* 掌握度热力图 */
.heatmap-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.heatmap-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.heatmap-title { font-size: 14px; font-weight: 700; color: var(--color-text); }
.heatmap-link {
    font-size: 12px;
    color: var(--color-primary);
    cursor: pointer;
}
.heatmap-body { display: flex; flex-direction: column; gap: 8px; }
.heatmap-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
}
.heatmap-subject {
    width: 80px;
    color: var(--color-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex-shrink: 0;
}
.heatmap-bar {
    flex: 1;
    height: 8px;
    background: var(--color-border-light);
    border-radius: 4px;
    overflow: hidden;
}
.heatmap-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.6s;
}
.heatmap-rate {
    width: 42px;
    text-align: right;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

/* 错题章节排行 */
.wrong-rank-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.wrong-rank-header { margin-bottom: 12px; }
.wrong-rank-title { font-size: 14px; font-weight: 700; color: var(--color-text); }
.wrong-rank-body { display: flex; flex-direction: column; gap: 10px; }
.wrong-rank-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
}
.wrong-rank-idx {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-danger-light);
    color: var(--color-danger);
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.wrong-rank-chapter {
    flex: 1;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.wrong-rank-count {
    color: var(--color-danger);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    flex-shrink: 0;
}

/* 弱项卡片（保留兼容） */
.weak-card {
    background: #FEF3C7;
    border: 1px solid #FDE68A;
    border-radius: var(--radius-lg);
    padding: 12px 16px;
    margin-bottom: 12px;
}
.weak-title { font-size: 13px; font-weight: 700; color: #92400E; margin-bottom: 8px; }
.weak-body { display: flex; flex-direction: column; gap: 6px; }
.weak-empty { font-size: 12px; color: var(--color-text-tertiary); }

.report-entry-link {
    text-align: center;
    padding: 12px;
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    background: #fff;
    border: 1px solid var(--color-border-light);
}

/* 微信二维码卡片 */
.wechat-qr-card {
    background: linear-gradient(135deg, #D1FAE5, #ECFDF5);
    border: 1.5px solid #6EE7B7;
    border-radius: var(--radius-lg);
    padding: 16px;
    text-align: center;
    margin-bottom: 12px;
}
.wq-title {
    font-size: 14px;
    font-weight: 700;
    color: #047857;
    margin-bottom: 12px;
}
.wq-img {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-md);
    object-fit: cover;
    display: block;
    margin: 0 auto;
    background: #fff;
    padding: 6px;
    box-shadow: var(--shadow-sm);
}
.wq-tip {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 10px;
    line-height: 1.6;
}
.wq-price {
    margin-top: 10px;
    padding: 5px 14px;
    background: #fff;
    border-radius: var(--radius-xl);
    display: inline-block;
    font-size: 12px;
    color: #047857;
    font-weight: 700;
    border: 1px solid #6EE7B7;
}

/* ============================================================
   11. 题目卡
   ============================================================ */
.question-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 18px 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.q-meta {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.tag {
    font-size: 11px;
    padding: 3px 9px;
    border-radius: var(--radius-xl);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 600;
}
.tag-orange { background: #FEF3C7; color: #D97706; }
.tag-purple { background: #F3E8FF; color: #9333EA; }

.q-stem {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 18px;
    font-weight: 500;
}

.q-options { display: flex; flex-direction: column; gap: 10px; }

.option-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition);
    background: #fff;
    text-align: left;
    user-select: none;
    line-height: 1.5;
}
.option-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-lighter);
}
.option-btn:active { transform: scale(0.99); }
.option-btn.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}
.option-letter {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
    transition: all var(--transition);
}
.option-btn.selected .option-letter { background: var(--color-primary); color: #fff; }
.option-btn.correct { border-color: var(--color-success); background: var(--color-success-light); }
.option-btn.correct .option-letter { background: var(--color-success); color: #fff; }
.option-btn.wrong { border-color: var(--color-danger); background: var(--color-danger-light); }
.option-btn.wrong .option-letter { background: var(--color-danger); color: #fff; }

.q-actions { margin-top: 16px; }

.result-banner {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    margin-top: 16px;
}
.result-banner.correct {
    background: var(--color-success-light);
    color: var(--color-success-dark);
    border: 1px solid #A3E4BC;
}
.result-banner.wrong {
    background: var(--color-danger-light);
    color: #C0392B;
    border: 1px solid #F5C6C6;
}

.next-area { margin-top: 16px; }

/* 解析 */
.analysis-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.analysis-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-primary);
    cursor: pointer;
    user-select: none;
}
.analysis-body {
    margin-top: 14px;
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text);
    padding-top: 14px;
    border-top: 1px solid var(--color-border-light);
}
.analysis-body h3 {
    font-size: 14px;
    color: var(--color-primary);
    margin: 12px 0 6px;
    font-weight: 700;
}
.analysis-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}
.analysis-body th {
    padding: 9px 12px;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font-size: 13px;
}
.analysis-body td {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    font-size: 13px;
}
.analysis-body tr:nth-child(even) { background: var(--color-primary-lighter); }

.flowchart {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
    background: var(--color-primary-lighter);
    border-radius: var(--radius-md);
    margin: 12px 0;
    font-size: 13px;
}
.flow-arrow { color: var(--color-primary); font-size: 16px; font-weight: 700; }

/* 题目扩展 */
.q-extras {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--color-border);
}
.q-extras-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.fav-btn {
    background: #fff;
    border: 1.5px solid var(--color-warning);
    color: var(--color-warning);
    padding: 6px 14px;
    border-radius: var(--radius-xl);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.fav-btn:hover { background: #FFFBEB; }
.fav-btn.active { background: var(--color-warning); color: #fff; }
.q-stat { font-size: 12px; color: var(--color-text-tertiary); }
.q-stat strong { color: var(--color-primary); }

.note-wrap {
    background: #F9FAFB;
    border-radius: var(--radius-md);
    padding: 12px;
    border: 1px solid var(--color-border-light);
    margin-bottom: 10px;
}
.note-wrap.has-note {
    background: #FFFBEB;
    border-color: #FDE68A;
}
.note-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}
.note-input {
    width: 100%;
    min-height: 60px;
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    outline: none;
    background: #fff;
}
.note-input:focus { border-color: var(--color-primary); }
.note-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
}
.note-msg { font-size: 12px; color: var(--color-success); }
.note-save-btn {
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.comment-btn {
    background: #fff;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
}

.report-link {
    font-size: 12px;
    color: var(--color-text-tertiary);
    text-align: right;
    margin-top: 8px;
    cursor: pointer;
}
.report-link:hover { color: var(--color-primary); }

/* ============================================================
   12. 筛选
   ============================================================ */
.filter-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.filter-row {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}
.filter-item { flex: 1; }
.filter-item label {
    display: block;
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-bottom: 6px;
}
.filter-item select {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    background: #fff;
    outline: none;
}

.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    align-items: center;
}
.filter-bar .select-inline { flex: 1; }

/* ============================================================
   13. 错题/收藏
   ============================================================ */
.wrong-item {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    margin-bottom: 10px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    border-left: 4px solid var(--color-danger);
    border-top: 1px solid var(--color-border-light);
    border-right: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}
.wrong-item .w-stem {
    font-size: 14px;
    color: var(--color-text);
    margin-bottom: 8px;
    line-height: 1.6;
}
.wrong-item .w-meta {
    font-size: 12px;
    color: var(--color-text-tertiary);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.wrong-hint {
    padding: 10px 14px;
    background: #FFFBEB;
    border-radius: var(--radius-md);
    font-size: 13px;
    color: #92400E;
    margin-bottom: 16px;
    border: 1px solid #FDE68A;
}

#page-favorites .wrong-item { border-left-color: var(--color-warning); }
#page-quiz-review .wrong-item { border-left-color: #0891B2; background: #F0FDFA; }

/* ============================================================
   14. 模拟考试
   ============================================================ */
.exam-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: #fff;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    font-size: 14px;
}

.exam-header-v2 {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #fff;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
}
.exam-timer {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    transition: color var(--transition);
}
.exam-timer.urgent {
    color: var(--color-danger);
    animation: exam-timer-pulse 1s ease-in-out infinite;
}
@keyframes exam-timer-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.exam-progress-track {
    height: 6px;
    background: var(--color-border-light);
    border-radius: 3px;
    overflow: hidden;
}
.exam-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #1E3A8A, #3B82F6);
    border-radius: 3px;
    transition: width 0.3s;
}
.exam-progress-text {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
}

.exam-nav {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}
.exam-nav .btn { flex: 1; }

.exam-result-card {
    padding: 28px 20px 24px;
    text-align: center;
    background: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%);
    border-radius: var(--radius-lg);
}
.er-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 20px;
}
.er-circle-wrap {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto 16px;
}
.er-circle { width: 100%; height: 100%; display: block; }
.er-score-wrap {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    line-height: 1;
}
.er-score {
    font-size: 52px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    display: inline-block;
    letter-spacing: -2px;
}
.er-score-unit {
    font-size: 14px;
    color: var(--color-text-tertiary);
    margin-top: 4px;
    font-weight: 500;
}
.er-level {
    display: inline-block;
    padding: 5px 20px;
    border-radius: var(--radius-xl);
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 22px;
}
.er-level.excellent { background: var(--color-success-light); color: var(--color-success-dark); }
.er-level.good      { background: #DBEAFE; color: #1E40AF; }
.er-level.pass      { background: var(--color-warning-light); color: #92400E; }
.er-level.fail      { background: var(--color-danger-light); color: #991B1B; }

.er-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 22px;
}
.er-stat {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 12px 6px;
    text-align: center;
}
.er-stat-num {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
    font-variant-numeric: tabular-nums;
    margin-bottom: 4px;
}
.er-stat-label { font-size: 11px; color: var(--color-text-tertiary); }
.er-actions { display: flex; gap: 10px; }
.er-btn { flex: 1; padding: 12px; font-size: 14px; }

/* ============================================================
   15. 学习日历
   ============================================================ */
.calendar-stats {
    font-size: 13px;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: 12px;
    line-height: 1.6;
}
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(15, 1fr);
    gap: 4px;
    margin: 8px 0;
}
.cal-cell {
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--color-border-light);
}
.cal-level-0 { background: var(--color-border-light); }
.cal-level-1 { background: #C7D2FE; }
.cal-level-2 { background: #818CF8; }
.cal-level-3 { background: #4F46E5; }
.cal-level-4 { background: #1E3A8A; }

.calendar-legend {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: flex-end;
    font-size: 11px;
    color: var(--color-text-tertiary);
    margin-top: 8px;
}
.calendar-legend .cal-cell { width: 12px; height: 12px; aspect-ratio: unset; }

/* ============================================================
   16. 排行榜
   ============================================================ */
.lb-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}
.lb-tab {
    flex: 1;
    padding: 10px;
    border: 1.5px solid var(--color-border);
    background: #fff;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition);
}
.lb-tab.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.lb-me-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: linear-gradient(135deg, #FFF8E1, #FFFDE7);
    border: 1.5px solid #FFD54F;
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    margin-bottom: 12px;
}
.lb-me-rank {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #FFD54F;
    color: #78350F;
    font-size: 17px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.lb-me-info { flex: 1; }
.lb-me-name { font-size: 14px; font-weight: 600; color: var(--color-text); }
.lb-me-stat { font-size: 12px; color: var(--color-text-tertiary); margin-top: 2px; }

.lb-list { display: flex; flex-direction: column; gap: 6px; }
.lb-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #fff;
    border-radius: var(--radius-md);
    padding: 12px 14px;
    border: 1px solid var(--color-border-light);
}
.lb-item.lb-me {
    background: #FFF8E1;
    border-color: #FFD54F;
}
.lb-rank {
    width: 32px;
    text-align: center;
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    flex-shrink: 0;
}
.lb-name {
    flex: 1;
    font-size: 14px;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.lb-stat {
    font-size: 12px;
    color: var(--color-text-tertiary);
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
}

/* ============================================================
   17. 邀请
   ============================================================ */
.invite-card {
    background: linear-gradient(135deg, #F3E8FF, #EDE9FE);
    border: 1.5px solid #C4B5FD;
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
    margin-bottom: 12px;
}
.invite-title {
    font-size: 13px;
    color: #6B21A8;
    font-weight: 600;
    margin-bottom: 12px;
}
.invite-code-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
}
.invite-code {
    font-size: 24px;
    font-weight: 700;
    color: #6B21A8;
    letter-spacing: 4px;
    font-family: ui-monospace, monospace;
    padding: 8px 16px;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.invite-desc { font-size: 12px; color: #6B21A8; line-height: 1.6; }

.invite-stats { display: flex; gap: 12px; margin-bottom: 12px; }
.invite-stat {
    flex: 1;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 14px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.invite-stat-num {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
}
.invite-stat-label {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-top: 4px;
}

.invite-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 13px;
}
.invite-item:last-child { border-bottom: none; }
.invite-name { color: var(--color-text); font-weight: 600; }
.invite-reward { color: var(--color-success); font-weight: 700; }
.invite-time { color: var(--color-text-tertiary); font-size: 11px; }

/* ============================================================
   18. 小组
   ============================================================ */
.group-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.group-join-input {
    flex: 1;
    min-width: 120px;
    padding: 10px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    outline: none;
}
.group-join-input:focus { border-color: var(--color-primary); }

.group-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    margin-bottom: 10px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}
.group-item:active { transform: scale(0.99); }
.group-info { flex: 1; min-width: 0; }
.group-name { font-size: 14px; font-weight: 600; color: var(--color-text); margin-bottom: 4px; }
.group-desc {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.group-meta { font-size: 12px; color: var(--color-primary); }
.group-arrow { font-size: 22px; color: var(--color-text-tertiary); flex-shrink: 0; }

.gd-title { font-size: 17px; font-weight: 700; color: var(--color-text); margin-bottom: 6px; }
.gd-desc { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 10px; }
.gd-code-line { font-size: 13px; color: var(--color-text-secondary); }
.gd-code-line strong {
    color: #6B21A8;
    font-family: ui-monospace, monospace;
    letter-spacing: 2px;
    background: #F3E8FF;
    padding: 3px 10px;
    border-radius: var(--radius-sm);
}

.gd-member {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.gd-member:last-child { border-bottom: none; }
.gd-member.gd-me {
    background: var(--color-primary-lighter);
    border-radius: var(--radius-sm);
    padding: 10px 8px;
}
.gd-rank {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
}
.gd-info { flex: 1; }
.gd-username { font-size: 14px; color: var(--color-text); font-weight: 600; }
.gd-stat { font-size: 12px; color: var(--color-text-tertiary); margin-top: 2px; }

.gd-owner-actions {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}
.gd-owner-actions .btn { flex: 1; }

/* ============================================================
   19. 讨论区
   ============================================================ */
.comment-input-wrap {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 12px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.comment-input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    resize: vertical;
    min-height: 70px;
}
.comment-input:focus { border-color: var(--color-primary); }

.comment-count {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-bottom: 12px;
}

.comments-list { display: flex; flex-direction: column; gap: 10px; }
.comment-item {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 12px 14px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    font-size: 12px;
}
.comment-author { color: var(--color-text); font-weight: 600; }
.comment-header.comment-mine .comment-author { color: var(--color-primary); }
.comment-time { color: var(--color-text-tertiary); font-size: 11px; }
.comment-content {
    font-size: 14px;
    color: var(--color-text);
    line-height: 1.6;
    word-break: break-word;
}
.comment-actions {
    margin-top: 8px;
    text-align: right;
}
.comment-del-btn {
    background: none;
    border: none;
    color: var(--color-danger);
    font-size: 12px;
    cursor: pointer;
    padding: 2px 6px;
}

/* ============================================================
   20. 我的
   ============================================================ */
.profile-card {
    text-align: center;
    padding: 28px 16px;
}
.profile-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1E3A8A, #10B981);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #fff;
    margin: 0 auto 12px;
    box-shadow: var(--shadow-md);
}
.profile-info { text-align: center; }
.profile-info .p-name {
    font-size: 19px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}
.profile-info .p-detail {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-top: 2px;
}

.switch-track-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: linear-gradient(135deg, #EEF2FF, #E0E7FF);
    border: 1.5px solid #C7D2FE;
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all var(--transition);
}
.switch-track-card:active { transform: scale(0.99); }
.stc-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #1E3A8A, #3B82F6);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}
.stc-content { flex: 1; min-width: 0; }
.stc-title { font-size: 14px; font-weight: 600; color: var(--color-text); margin-bottom: 3px; }
.stc-desc { font-size: 12px; color: var(--color-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stc-desc span { font-weight: 700; }
.stc-arrow { font-size: 22px; color: var(--color-primary); flex-shrink: 0; }

.profile-setting {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 13px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.profile-setting:last-child { border-bottom: none; }
.profile-setting .s-label { font-size: 14px; color: var(--color-text); }
.profile-setting .s-value {
    font-size: 14px;
    color: var(--color-primary);
    cursor: pointer;
    font-weight: 500;
}

/* ============================================================
   21. 学习报告
   ============================================================ */
.report-overview {
    display: flex;
    justify-content: space-around;
    padding: 16px 8px;
    text-align: center;
}
.ro-item { flex: 1; }
.ro-num {
    font-size: 22px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    margin-bottom: 4px;
}
.ro-label { font-size: 11px; color: var(--color-text-tertiary); }

.radar-canvas {
    width: 100%;
    height: auto;
    max-width: 300px;
    margin: 0 auto;
    display: block;
}

.mastery-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 0;
    font-size: 13px;
}
.mastery-item .m-label {
    width: 82px;
    flex-shrink: 0;
    color: var(--color-text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mastery-item .m-bar {
    flex: 1;
    height: 8px;
    background: var(--color-border-light);
    border-radius: 4px;
    overflow: hidden;
}
.mastery-item .m-bar .m-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.6s;
}
.mastery-item .m-pct {
    width: 46px;
    text-align: right;
    font-weight: 600;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}
.mastery-item .m-level {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 10px;
    color: #fff;
    margin-left: 4px;
}
.level-weak { background: var(--color-danger); }
.level-medium { background: var(--color-warning); }
.level-strong { background: var(--color-success); }

/* ============================================================
   22. 管理后台
   ============================================================ */
.admin-tabs {
    display: flex;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
}
.admin-tab-btn {
    flex: 1;
    padding: 14px 16px;
    background: #fff;
    border: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    font-family: inherit;
    transition: all var(--transition);
}
.admin-tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.admin-tab-content {
    padding: 12px;
    background: var(--color-bg);
    min-height: calc(100vh - 120px);
}
.admin-tab-content.active { display: block; }

.admin-filter-bar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px;
    align-items: center;
}
.admin-filter-bar .select-inline,
.admin-filter-bar .input-inline { flex: 1; min-width: 80px; }

.admin-table-wrap,
.code-table-wrap {
    overflow-x: auto;
    background: #fff;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    border: 1px solid var(--color-border);
}
.admin-table-wrap table,
.code-table-wrap table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    min-width: 900px;
}
.admin-table-wrap th,
.code-table-wrap th {
    padding: 10px 8px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 700;
    text-align: left;
    border-bottom: 1px solid #C7D2FE;
    white-space: nowrap;
}
.admin-table-wrap td,
.code-table-wrap td {
    padding: 8px;
    border-bottom: 1px solid var(--color-border-light);
    text-align: left;
    vertical-align: top;
}

.status-used { color: var(--color-danger); font-weight: 600; }
.status-unused { color: var(--color-success); font-weight: 600; }

.admin-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.report-item {
    padding: 14px;
    margin-bottom: 8px;
    background: #FFFBEB;
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-warning);
    font-size: 13px;
    border-top: 1px solid #FDE68A;
    border-right: 1px solid #FDE68A;
    border-bottom: 1px solid #FDE68A;
}
.report-item .r-type { font-weight: 700; color: var(--color-danger); }
.report-item .r-stem { margin: 4px 0; color: var(--color-text); }
.report-item .r-desc { color: var(--color-text-secondary); font-size: 12px; }
.report-item .r-time { color: var(--color-text-tertiary); font-size: 11px; }

/* ============================================================
   23. 弹窗
   ============================================================ */
.modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
}
.modal.hidden { display: none; }

.modal-content {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 24px 20px;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}
.modal-wide { max-width: 520px; }

.modal-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
}

.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
}
.modal-overlay.hidden { display: none; }

.modal-box {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 24px 20px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.modal-dark { background: rgba(0, 0, 0, 0.75); align-items: flex-start; padding: 20px 0; }

.question-preview-wrap {
    width: 90%;
    max-width: 460px;
    margin: 0 auto;
}

/* 批量导入 */
.batch-result {
    margin-top: 12px;
    font-size: 13px;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--color-text);
    line-height: 1.6;
}
.batch-progress {
    margin-top: 8px;
    font-size: 13px;
    color: var(--color-text-tertiary);
}

/* ============================================================
   24. 付费墙
   ============================================================ */
.vip-wall-box {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 22px 20px 20px;
    width: 100%;
    max-width: 380px;
    max-height: 88vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    text-align: center;
}
.vw-header {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 6px;
}
.vw-sub {
    font-size: 14px;
    color: var(--color-text);
    margin-bottom: 16px;
}
.vw-sub span { color: var(--color-danger); font-weight: 700; }

.vw-qr-wrap {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 10px;
    display: inline-block;
    margin-bottom: 12px;
}
.vw-qr {
    width: 180px;
    height: 180px;
    border-radius: var(--radius-sm);
    display: block;
    background: #fff;
}
.vw-tip {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}
.vw-benefits-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    margin-bottom: 10px;
    text-align: left;
}
.vw-benefits {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 10px;
    font-size: 13px;
    color: var(--color-text);
    text-align: left;
    background: var(--color-primary-lighter);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    margin-bottom: 4px;
}

/* ============================================================
   25. 题卡预览
   ============================================================ */
.qp-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    color: var(--color-text);
    line-height: 1.7;
}
.qp-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-primary);
    margin-bottom: 14px;
}
.qp-meta { font-size: 13px; font-weight: 700; color: var(--color-primary); }
.qp-id {
    font-size: 12px;
    color: var(--color-text-tertiary);
    background: var(--color-primary-light);
    padding: 2px 10px;
    border-radius: 10px;
}
.qp-paper {
    font-size: 12px;
    color: #D97706;
    background: #FEF3C7;
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    font-weight: 600;
}
.qp-stem {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 16px;
    line-height: 1.7;
}
.qp-options { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.qp-option {
    display: flex;
    gap: 10px;
    padding: 8px 12px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1.6;
}
.qp-option-correct { background: var(--color-success-light); border: 1px solid #A3E4BC; }
.qp-letter { font-weight: 700; color: var(--color-primary); flex-shrink: 0; }
.qp-option-correct .qp-letter { color: var(--color-success-dark); }
.qp-option-text { flex: 1; color: var(--color-text); }
.qp-answer {
    font-size: 14px;
    color: var(--color-success-dark);
    background: var(--color-success-light);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
}
.qp-answer strong { font-size: 16px; }
.qp-analysis {
    background: var(--color-primary-lighter);
    border-left: 3px solid var(--color-primary);
    padding: 12px 14px;
    border-radius: var(--radius-md);
    margin-bottom: 14px;
}
.qp-analysis-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}
.qp-analysis-body {
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.7;
    word-break: break-word;
}
.qp-footer {
    padding-top: 14px;
    border-top: 1px dashed var(--color-border);
    text-align: center;
}
.qp-brand {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

/* ============================================================
   26. 真题模式切换
   ============================================================ */
.mode-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}
.mode-tab {
    flex: 1;
    padding: 10px;
    border: 1.5px solid var(--color-border);
    background: #fff;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition);
}
.mode-tab.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.mode-tab.btn-outline {
    background: #fff;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* ============================================================
   27. 底部 Tab
   ============================================================ */
.global-tab-bar {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 500px;
    height: 60px;
    background: #fff;
    display: flex;
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.06);
    border-top: 1px solid var(--color-border-light);
    z-index: 500;
    padding-bottom: env(safe-area-inset-bottom, 0);
}
.gtab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    cursor: pointer;
    user-select: none;
    color: var(--color-text-tertiary);
    transition: color var(--transition);
    position: relative;
}
.gtab-item.active { color: var(--color-primary); }
.gtab-item.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 0 0 3px 3px;
}
.gtab-icon svg { width: 22px; height: 22px; display: block; }
.gtab-label { font-size: 11px; font-weight: 500; }

/* ============================================================
   28. 小屏优化
   ============================================================ */
@media (max-width: 380px) {
    .quick-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
    .quick-icon { width: 36px; height: 36px; }
    .quick-icon svg { width: 20px; height: 20px; }
    .quick-title { font-size: 10px; }
    .er-score { font-size: 44px; }
    .er-circle-wrap { width: 140px; height: 140px; }
    .wq-img { width: 180px; height: 180px; }
    .login-logo { width: 76px; height: 76px; }
    .login-title { font-size: 22px; }
}
/* AI 解析关键词高亮 */
.kw-hl {
    background: linear-gradient(180deg, transparent 60%, #FEF3C7 60%);
    color: #1E3A8A;
    font-weight: 700;
    padding: 0 2px;
}