/* ============================================================
   校区拼车平台 - 主样式表
   移动优先设计，支持暗色/亮色主题
   ============================================================ */

/* --- CSS变量（设计令牌） --- */
:root {
    --primary: #4F46E5;
    --primary-light: #6366F1;
    --primary-dark: #3730A3;
    --primary-bg: #EEF2FF;
    --success: #10B981;
    --success-bg: #D1FAE5;
    --warning: #F59E0B;
    --warning-bg: #FEF3C7;
    --danger: #EF4444;
    --danger-bg: #FEE2E2;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --white: #FFFFFF;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: 0.2s ease;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --bottom-nav-h: 64px;
    --top-nav-h: 56px;
}

/* --- 全局重置 --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }

/* --- 页面主体 --- */
.main-content {
    padding: 16px;
    padding-top: calc(var(--top-nav-h) + 16px);
    padding-bottom: calc(var(--bottom-nav-h) + 16px);
    max-width: 800px;
    margin: 0 auto;
    min-height: 100vh;
}
.bottom-spacer { height: var(--bottom-nav-h); }

/* --- 顶部导航栏 --- */
.top-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--top-nav-h);
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 100;
}
.nav-inner {
    max-width: 800px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}
.nav-logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--gray-900); font-weight: 700; font-size: 18px; }
.nav-logo:hover { color: var(--gray-900); }
.logo-icon { font-size: 24px; }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-btn {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 6px 14px; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 500; color: var(--gray-700);
    border: 1px solid var(--gray-300); background: var(--white);
    cursor: pointer; transition: var(--transition);
    white-space: nowrap; text-decoration: none;
}
.nav-btn:hover { background: var(--gray-50); color: var(--gray-700); }
.nav-btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.nav-btn-primary:hover { background: var(--primary-dark); color: var(--white); }

/* 头像按钮 / 下拉菜单 */
.nav-user-menu { position: relative; }
.nav-avatar-btn {
    width: 36px; height: 36px; border-radius: 50%; border: none;
    background: var(--primary); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}
.avatar { color: var(--white); font-size: 16px; font-weight: 600; }
.nav-dropdown {
    position: absolute; top: 44px; right: 0;
    background: var(--white); border-radius: var(--radius);
    box-shadow: var(--shadow-lg); min-width: 200px;
    overflow: hidden; z-index: 200; border: 1px solid var(--gray-200);
}
.nav-dropdown .dropdown-header {
    padding: 12px 16px; border-bottom: 1px solid var(--gray-100);
}
.nav-dropdown .dropdown-header strong { display: block; font-size: 14px; }
.nav-dropdown .dropdown-header small { color: var(--gray-500); font-size: 12px; }
.nav-dropdown a {
    display: block; padding: 10px 16px; color: var(--gray-700);
    font-size: 14px; transition: var(--transition);
}
.nav-dropdown a:hover { background: var(--gray-50); color: var(--primary); }

/* --- 底部导航栏（移动端） --- */
.bottom-nav {
    position: fixed; bottom: 0; left: 0; right: 0;
    height: var(--bottom-nav-h);
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--gray-200);
    display: flex; align-items: center;
    z-index: 100; max-width: 100%;
}
.bn-item {
    flex: 1; display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    gap: 2px; padding: 8px 0;
    color: var(--gray-500); font-size: 11px; text-decoration: none;
    transition: var(--transition);
}
.bn-item svg { width: 22px; height: 22px; stroke: var(--gray-500); }
.bn-item.active, .bn-item.active svg { color: var(--primary); stroke: var(--primary); }
.bn-item:active { transform: scale(.95); }

/* --- 卡片 --- */
.card {
    background: var(--white); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 16px; margin-bottom: 12px;
    transition: var(--transition);
}
.card:active { transform: scale(.99); }
.card-header { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--gray-900); }
.card-body { color: var(--gray-600); font-size: 14px; }

/* 拼车卡片 */
.ride-card {
    background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md); padding: 0; margin-bottom: 14px;
    overflow: hidden; transition: var(--transition);
    border: 1px solid var(--gray-100);
}
.ride-card:active { transform: none; box-shadow: var(--shadow-lg); }
.ride-card-top {
    display: flex; align-items: center; gap: 12px;
    padding: 16px 16px 12px;
}
.ride-route {
    flex: 1; display: flex; align-items: center; gap: 8px;
    font-weight: 600; font-size: 15px;
}
.ride-route .from, .ride-route .to { color: var(--gray-800); }
.ride-route .arrow { color: var(--primary); font-size: 18px; }
.ride-badge {
    padding: 4px 10px; border-radius: 20px; font-size: 12px;
    font-weight: 600; white-space: nowrap;
}
.ride-badge-available { background: var(--success-bg); color: var(--success); }
.ride-badge-full { background: var(--danger-bg); color: var(--danger); }
.ride-badge-ended { background: var(--gray-100); color: var(--gray-500); }
.ride-card-meta {
    display: flex; flex-wrap: wrap; gap: 8px;
    padding: 0 16px 16px; color: var(--gray-500); font-size: 13px;
}
.ride-card-meta span {
    display: inline-flex; align-items: center; gap: 4px;
}
.ride-card-actions {
    display: flex; border-top: 1px solid var(--gray-100);
}
.ride-card-actions .btn, .ride-card-actions button { flex: 1; border-radius: 0; margin: 0; }

/* --- 按钮 --- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 20px; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 600; border: none;
    cursor: pointer; transition: var(--transition);
    text-decoration: none; white-space: nowrap; line-height: 1.5;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); color: var(--white); }
.btn-success { background: var(--success); color: var(--white); }
.btn-success:hover { background: #059669; color: var(--white); }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #DC2626; color: var(--white); }
.btn-outline {
    background: var(--white); color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-bg); }
.btn-outline-danger {
    background: var(--white); color: var(--danger);
    border: 2px solid var(--danger);
}
.btn-outline-danger:hover { background: var(--danger-bg); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { display: flex; width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }

/* --- 表单 --- */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block; font-size: 14px; font-weight: 600;
    color: var(--gray-700); margin-bottom: 6px;
}
.form-label .required { color: var(--danger); margin-left: 2px; }
.form-input, .form-select, .form-textarea {
    width: 100%; padding: 10px 14px; border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm); font-size: 15px;
    color: var(--gray-800); background: var(--white);
    transition: var(--transition); outline: none;
    -webkit-appearance: none; appearance: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-bg);
}
.form-input.error, .form-select.error { border-color: var(--danger); }
.form-textarea { min-height: 80px; resize: vertical; }
.form-hint { font-size: 12px; color: var(--gray-400); margin-top: 4px; }
.form-error { font-size: 12px; color: var(--danger); margin-top: 4px; }
.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 10px center; background-repeat: no-repeat;
    background-size: 20px; padding-right: 36px;
}
.form-inline { display: flex; gap: 8px; }
.form-inline .form-input { flex: 1; }

/* --- 搜索栏 --- */
.search-section { margin-bottom: 16px; }
.search-bar {
    position: relative; display: flex; gap: 8px; flex-wrap: wrap;
}
.search-input {
    flex: 1; min-width: 160px;
    padding: 12px 16px; border: 2px solid var(--gray-200);
    border-radius: var(--radius); font-size: 15px;
    background: var(--white); outline: none;
}
.search-input:focus { border-color: var(--primary); }
.filter-group { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }

/* --- 空状态 --- */
.empty-state { text-align: center; padding: 40px 20px; color: var(--gray-400); }
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { margin-bottom: 8px; }

/* --- 标签/徽章 --- */
.tag {
    display: inline-block; padding: 2px 8px; border-radius: 4px;
    font-size: 12px; font-weight: 500; background: var(--gray-100);
    color: var(--gray-600);
}
.tag-primary { background: var(--primary-bg); color: var(--primary); }
.tag-success { background: var(--success-bg); color: var(--success); }

/* --- 认证页面 --- */
.auth-container {
    max-width: 400px; margin: 0 auto; padding: 20px 0;
}
.auth-card {
    background: var(--white); border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg); padding: 32px 24px;
    border: 1px solid var(--gray-100);
}
.auth-title { text-align: center; font-size: 22px; font-weight: 700; margin-bottom: 8px; color: var(--gray-900); }
.auth-subtitle { text-align: center; color: var(--gray-500); font-size: 14px; margin-bottom: 24px; }
.auth-link { text-align: center; margin-top: 16px; font-size: 14px; color: var(--gray-500); }
.auth-link a { font-weight: 600; }

/* 验证码输入 */
.code-input-group { display: flex; gap: 8px; align-items: center; }
.code-input-group .form-input { flex: 1; min-width: 0; }
.send-code-btn {
    white-space: nowrap; padding: 10px 16px; font-size: 14px;
    border-radius: var(--radius-sm); border: 2px solid var(--primary);
    background: var(--white); color: var(--primary); cursor: pointer;
    font-weight: 600; transition: var(--transition);
}
.send-code-btn:hover { background: var(--primary-bg); }
.send-code-btn:disabled { opacity: .5; cursor: not-allowed; }

/* --- 拼车详情 --- */
.ride-detail { max-width: 600px; margin: 0 auto; }
.ride-detail-card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); overflow: hidden; }
.ride-detail-header { background: var(--primary); color: var(--white); padding: 24px; text-align: center; }
.ride-detail-route { font-size: 20px; font-weight: 700; }
.ride-detail-body { padding: 20px; }
.ride-detail-row { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--gray-100); }
.ride-detail-row:last-child { border-bottom: none; }
.ride-detail-label { color: var(--gray-500); font-size: 14px; }
.ride-detail-value { font-weight: 600; text-align: right; }

/* --- 用户中心 --- */
.user-center-header {
    text-align: center; padding: 24px 0 16px;
}
.user-avatar {
    width: 80px; height: 80px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 34px; font-weight: 700; margin-bottom: 10px;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}
.user-badges { display: flex; gap: 6px; justify-content: center; margin-top: 6px; flex-wrap: wrap; }
.user-badge {
    display: inline-flex; align-items: center; gap: 3px;
    padding: 2px 8px; border-radius: 12px; font-size: 11px; font-weight: 500;
}
.user-badge-verified { background: var(--success-bg); color: var(--success); }
.user-badge-warn { background: var(--warning-bg); color: var(--warning); }
.user-badge-info { background: var(--primary-bg); color: var(--primary); }
.user-badge-level { background: var(--gray-100); color: var(--gray-600); }

/* 安全评分 */
.security-score {
    display: flex; align-items: center; gap: 12px; padding: 14px 16px;
    background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 12px;
}
.security-score .score-ring {
    width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 700; flex-shrink: 0;
}
.security-score .score-ring.high { background: var(--success-bg); color: var(--success); border: 3px solid var(--success); }
.security-score .score-ring.mid { background: var(--warning-bg); color: var(--warning); border: 3px solid var(--warning); }
.security-score .score-ring.low { background: var(--danger-bg); color: var(--danger); border: 3px solid var(--danger); }
.security-score .score-body { flex: 1; }
.security-score .score-title { font-size: 14px; font-weight: 600; color: var(--gray-800); }
.security-score .score-hint { font-size: 12px; color: var(--gray-500); margin-top: 2px; }
.security-score .score-bar { height: 4px; border-radius: 2px; background: var(--gray-100); margin-top: 6px; overflow: hidden; }
.security-score .score-bar-fill { height: 100%; border-radius: 2px; transition: width .3s; }

/* 用户中心统计 */
.uc-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 16px; }
.uc-stat-card {
    background: var(--white); border-radius: var(--radius); padding: 14px 10px;
    text-align: center; box-shadow: var(--shadow);
}
.uc-stat-card .uc-stat-icon { font-size: 20px; margin-bottom: 4px; }
.uc-stat-card .uc-stat-val { font-size: 20px; font-weight: 700; }
.uc-stat-card .uc-stat-lbl { font-size: 12px; color: var(--gray-500); margin-top: 2px; }

/* 我的发布卡片 */
.my-ride-mini {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 0; border-bottom: 1px solid var(--gray-100);
}
.my-ride-mini:last-child { border-bottom: none; }
.my-ride-mini .ride-info { flex: 1; min-width: 0; }
.my-ride-mini .ride-route-text {
    font-size: 14px; font-weight: 600; color: var(--gray-800);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.my-ride-mini .ride-meta-text { font-size: 12px; color: var(--gray-400); margin-top: 2px; }
.my-ride-mini .ride-seats-badge {
    flex-shrink: 0; padding: 4px 10px; border-radius: 12px;
    font-size: 12px; font-weight: 600;
}
.seats-available { background: var(--success-bg); color: var(--success); }
.seats-full { background: var(--warning-bg); color: var(--warning); }

/* 空状态引导 */
.empty-guide {
    text-align: center; padding: 24px 16px; color: var(--gray-400);
}
.empty-guide .empty-icon { font-size: 36px; margin-bottom: 8px; }
.empty-guide p { font-size: 13px; margin-bottom: 8px; }
.empty-guide .empty-action { display: inline-block; margin-top: 4px; }

/* 通知操作栏 */
.notif-toolbar {
    display: flex; gap: 8px; align-items: center; margin-bottom: 10px; flex-wrap: wrap;
}
.notif-toolbar .notif-filter { display: flex; gap: 4px; }
.notif-toolbar .notif-filter a {
    padding: 4px 10px; border-radius: 12px; font-size: 12px;
    color: var(--gray-600); background: var(--gray-50); text-decoration: none;
}
.notif-toolbar .notif-filter a.active { background: var(--primary-bg); color: var(--primary); font-weight: 600; }

/* 快捷入口 */
.quick-actions { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 16px; }
.quick-action-btn {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 14px 8px; background: var(--white); border-radius: var(--radius);
    box-shadow: var(--shadow); text-decoration: none; color: var(--gray-700);
    transition: var(--transition); font-size: 13px; font-weight: 500;
}
.quick-action-btn:hover { background: var(--primary-bg); color: var(--primary); }
.quick-action-btn .qa-icon { font-size: 24px; }

@media (max-width: 400px) {
    .uc-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .quick-actions { grid-template-columns: repeat(2, 1fr); }
}

.menu-list { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.menu-item {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 16px; border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700); text-decoration: none; transition: var(--transition);
    cursor: pointer;
}
.menu-item:last-child { border-bottom: none; }
.menu-item:hover { background: var(--gray-50); }
.menu-item:active { background: var(--gray-100); }
.menu-item .menu-icon { font-size: 20px; flex-shrink: 0; }
.menu-item .menu-text { flex: 1; }
.menu-item .menu-arrow { color: var(--gray-400); }

/* --- 表格 --- */
.table-container { overflow-x: auto; -webkit-overflow-scrolling: touch; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead { background: var(--gray-50); }
th { padding: 12px 16px; text-align: left; font-weight: 600; color: var(--gray-600); font-size: 13px; border-bottom: 2px solid var(--gray-200); white-space: nowrap; }
td { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--gray-50); }

/* --- 统计卡片（管理后台） --- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card {
    background: var(--white); border-radius: var(--radius);
    padding: 16px; box-shadow: var(--shadow); text-align: center;
}
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 13px; color: var(--gray-500); margin-top: 4px; }

/* --- 分页 --- */
.pagination { display: flex; justify-content: center; gap: 4px; margin: 20px 0; }
.pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 500;
}
.pagination a { background: var(--white); color: var(--gray-700); border: 1px solid var(--gray-200); }
.pagination a:hover { background: var(--primary-bg); border-color: var(--primary); color: var(--primary); }
.pagination .active { background: var(--primary); color: var(--white); border-color: var(--primary); }
.pagination .disabled { color: var(--gray-300); pointer-events: none; }
.pagination .dots { color: var(--gray-400); }

/* --- 提示消息 --- */
.flash-msg {
    padding: 12px 16px; margin-bottom: 16px;
    border-radius: var(--radius-sm); font-size: 14px;
    display: flex; align-items: center; gap: 8px; cursor: pointer;
}
.flash-success { background: var(--success-bg); color: #065F46; border: 1px solid #A7F3D0; }
.flash-error { background: var(--danger-bg); color: #991B1B; border: 1px solid #FECACA; }
.flash-warning { background: var(--warning-bg); color: #92400E; border: 1px solid #FDE68A; }
.flash-info { background: var(--primary-bg); color: #3730A3; border: 1px solid #C7D2FE; }
.flash-icon { font-weight: 700; font-size: 16px; }

/* --- 模态框 --- */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.5);
    z-index: 300; display: flex; align-items: center; justify-content: center;
    padding: 16px;
}
.modal {
    background: var(--white); border-radius: var(--radius-lg);
    padding: 24px; max-width: 400px; width: 100%; box-shadow: var(--shadow-lg);
}
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.modal-body { margin-bottom: 20px; color: var(--gray-600); font-size: 14px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* --- 加载/骨架屏 --- */
.skeleton {
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
    background-size: 200% 100%; animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
.skeleton-text { height: 16px; margin-bottom: 8px; }
.skeleton-card { height: 120px; margin-bottom: 12px; border-radius: var(--radius); }

/* --- 响应式 --- */
@media (min-width: 768px) {
    .bottom-nav { display: none; }
    .bottom-spacer { display: none; }
    .main-content { padding-top: calc(var(--top-nav-h) + 24px); padding-bottom: 24px; }
    .auth-container { padding: 40px 0; }
    .auth-card { padding: 40px 32px; }
    .ride-card-meta { gap: 16px; }
    .ride-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
}

@media (max-width: 400px) {
    .nav-logo .logo-text { display: none; }
    .nav-btn { padding: 6px 10px; font-size: 13px; }
    .ride-route { font-size: 14px; }
    .card { padding: 12px; }
}

/* --- 管理后台布局 --- */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 240px; background: var(--gray-900); color: var(--white);
    padding: 20px 0; flex-shrink: 0; display: flex; flex-direction: column;
}
.admin-sidebar .admin-logo {
    padding: 0 20px 20px; font-size: 18px; font-weight: 700;
    border-bottom: 1px solid var(--gray-700); margin-bottom: 12px;
}
.admin-sidebar .admin-nav { flex: 1; }
.admin-sidebar a {
    display: flex; align-items: center; gap: 10px;
    padding: 11px 20px; color: var(--gray-400); text-decoration: none;
    font-size: 14px; transition: .2s; border-left: 3px solid transparent;
}
.admin-sidebar a:hover { background: var(--gray-800); color: var(--gray-200); }
.admin-sidebar a.active { background: var(--gray-800); color: var(--white); border-left-color: var(--primary-light); }
.admin-sidebar .admin-footer {
    margin-top: auto; padding-top: 12px; border-top: 1px solid var(--gray-700);
}
.admin-sidebar .admin-footer a { color: var(--gray-500); font-size: 13px; }
.admin-sidebar .sidebar-badge {
    margin-left: auto; background: var(--danger); color: #fff;
    font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 10px;
}
.admin-main { flex: 1; padding: 28px; background: var(--gray-50); min-width: 0; overflow-x: hidden; }
.admin-main h1 { font-size: 22px; font-weight: 700; color: var(--gray-900); }
.admin-table-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* 后台统计卡片变体 */
.stat-card-blue { border-top: 3px solid var(--primary); }
.stat-card-green { border-top: 3px solid var(--success); }
.stat-card-orange { border-top: 3px solid var(--warning); }
.stat-card-red { border-top: 3px solid var(--danger); }
.stat-card .stat-icon { font-size: 28px; margin-bottom: 4px; }
.stat-card .stat-trend { font-size: 12px; color: var(--gray-400); margin-top: 4px; }
.stat-card .stat-trend .up { color: var(--success); }
.stat-card .stat-trend .down { color: var(--danger); }

/* 趋势图表 */
.trend-chart-wrap { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px; }
.trend-chart-wrap h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--gray-800); }
.css-bar-chart { display: flex; align-items: flex-end; gap: 6px; height: 120px; padding-top: 8px; }
.css-bar-chart .bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.css-bar-chart .bar { width: 100%; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 4px; transition: height .3s; position: relative; }
.css-bar-chart .bar:hover { background: var(--primary-dark); }
.css-bar-chart .bar .bar-val {
    position: absolute; top: -18px; left: 50%; transform: translateX(-50%);
    font-size: 11px; color: var(--gray-600); font-weight: 600; white-space: nowrap;
}
.css-bar-chart .bar-label { font-size: 11px; color: var(--gray-500); }

/* 待办事项卡片 */
.todo-card { display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 10px; border-left: 4px solid var(--warning); }
.todo-card .todo-icon { font-size: 24px; }
.todo-card .todo-body { flex: 1; }
.todo-card .todo-title { font-size: 14px; font-weight: 600; color: var(--gray-800); }
.todo-card .todo-desc { font-size: 12px; color: var(--gray-500); margin-top: 2px; }
.todo-card .todo-count { font-size: 22px; font-weight: 700; color: var(--warning); }

/* 操作下拉菜单 */
.action-dropdown { position: relative; display: inline-block; }
.action-dropdown .action-btn {
    padding: 5px 12px; font-size: 13px; border-radius: var(--radius-sm);
    background: var(--white); color: var(--gray-700); border: 1px solid var(--gray-300);
    cursor: pointer; font-weight: 500;
}
.action-dropdown .action-menu {
    display: none; position: absolute; right: 0; top: 100%; z-index: 50;
    background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md); min-width: 130px; margin-top: 4px;
}
.action-dropdown.open .action-menu { display: block; }
.action-dropdown .action-menu button, .action-dropdown .action-menu a {
    display: block; width: 100%; text-align: left; padding: 8px 14px;
    font-size: 13px; color: var(--gray-700); background: none; border: none;
    cursor: pointer; text-decoration: none; white-space: nowrap;
}
.action-dropdown .action-menu button:hover, .action-dropdown .action-menu a:hover { background: var(--gray-50); }
.action-dropdown .action-menu .danger { color: var(--danger); }

/* 热门路线排行 */
.hot-route-item { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--gray-100); }
.hot-route-item:last-child { border-bottom: none; }
.hot-route-rank { width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.hot-route-rank.r1 { background: #FFD700; color: #fff; }
.hot-route-rank.r2 { background: #C0C0C0; color: #fff; }
.hot-route-rank.r3 { background: #CD7F32; color: #fff; }
.hot-route-rank.rn { background: var(--gray-100); color: var(--gray-500); }
.hot-route-name { flex: 1; font-size: 14px; color: var(--gray-700); }
.hot-route-count { font-size: 13px; font-weight: 600; color: var(--gray-500); }

/* 系统健康状态 */
.health-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.health-item { background: var(--white); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.health-item .health-label { font-size: 13px; color: var(--gray-500); margin-bottom: 6px; }
.health-item .health-value { font-size: 18px; font-weight: 700; }
.health-item .health-value.ok { color: var(--success); }
.health-item .health-value.warn { color: var(--warning); }
.health-item .health-value.err { color: var(--danger); }

@media (max-width: 768px) {
    .admin-layout { flex-direction: column; }
    .admin-sidebar { width: 100%; padding: 12px; flex-direction: row; flex-wrap: wrap; }
    .admin-sidebar .admin-logo { padding: 0 8px 8px; border-bottom: none; margin-bottom: 0; width: 100%; border-bottom: 1px solid var(--gray-700); padding-bottom: 10px; }
    .admin-sidebar .admin-nav { display: flex; flex-wrap: wrap; gap: 2px; width: 100%; }
    .admin-sidebar a { display: inline-flex; padding: 7px 12px; border-left: none; border-bottom: 2px solid transparent; }
    .admin-sidebar a.active { border-left: none; border-bottom-color: var(--primary-light); }
    .admin-sidebar .admin-footer { width: 100%; margin-top: 8px; padding-top: 8px; }
    .admin-main { padding: 16px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 打印样式 */
@media print {
    .top-nav, .bottom-nav, .ride-card-actions, .btn { display: none !important; }
    .main-content { padding-top: 0; }
}