/**
 * 统一样式文件 v2 - 统一为原系统风格
 * 精简、现代、优雅
 */

/* 重置和基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --brand-grad-start: #4e6a80;
    --brand-grad-end: #3d5668;
    --brand-border: #587286;
    --nav-bg: #5c7d91;
    --accent: #ff9655;
    --accent-hover: #ffb57f;
    --primary: #2c3e50;
    --primary-hover: #34495e;
    --bg: linear-gradient(120deg,#f5f7fa 0%,#e7edf3 100%);
    --bg-solid: #f5f7fa;
    --surface: #ffffff;
    --text: #2c3e50;
    --text-secondary: #5c7d91;
    --border: #d2d2d7;
    --nav-dark: #2c3e50;
    --success: #34c759;
    --error: #ff3b30;
    --warning: #ff9500;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    background: linear-gradient(120deg,#f5f7fa 0%,#e7edf3 100%);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* 移动端优化 */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    .admin-container {
        padding: 12px;
    }
    
    .card {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 18px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* 防止iOS自动缩放 */
    }
    
    .btn {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        width: 100%;
        margin-bottom: 8px;
    }
}

/* 头部 */
.admin-header {
    background: linear-gradient(135deg, var(--brand-grad-start), var(--brand-grad-end));
    border-bottom: 1px solid var(--brand-border);
    padding: 20px 40px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 6px rgba(0,0,0,.10);
    color: #fff;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.admin-header h1 {
    font-size: 21px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.header-info {
    font-size: 14px;
    color: #fff;
    display: flex;
    gap: 12px;
    align-items: center;
}

.header-info a {
    color: #fff;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.2s;
}

.header-info a:hover {
    opacity: 0.7;
}

/* 导航 */
.admin-nav {
    background: var(--nav-dark);
    border-bottom: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: none;
    cursor: pointer;
    background: none;
    border: 1px solid rgba(255,255,255,.55);
    color: #fff;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 14px;
    line-height: 1;
    transition: background .2s, border-color .2s;
    margin: 8px 12px;
    white-space: nowrap;
}

.nav-toggle:hover {
    background: rgba(255,255,255,.12);
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.nav-links {
    display: flex;
    list-style: none;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    gap: 4px;
}

.nav-links li {
    display: block;
}

.nav-links a {
    display: block;
    padding: 12px 16px;
    color: #ecf0f1;
    text-decoration: none;
    font-size: 14px;
    border-radius: 4px;
    transition: all 0.18s;
}

.nav-links a:hover {
    background: rgba(236,240,241,0.08);
    color: #ecf0f1;
}

.nav-links a.active {
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,.25);
}

/* 移动端导航 */
@media (max-width: 768px) {
    .admin-nav {
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: flex-end;
        padding: 0;
        position: relative;
    }

    .nav-toggle {
        display: block;
        margin: 8px 12px 8px 12px;
        flex-shrink: 0;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        right: 12px;
        flex-direction: column;
        gap: 6px;
        padding: 0;
        max-width: none;
        width: auto;
        min-width: 140px;
        background: #34495e;
        border-radius: 8px;
        z-index: 999;
        box-shadow: 0 8px 22px rgba(0,0,0,.18);
        margin-top: 4px;
    }

    /* 展开时显示 */
    .nav-links.show {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        width: 100%;
        white-space: nowrap;
        padding: 10px 14px;
        border-radius: 6px;
        box-sizing: border-box;
    }

    .nav-links a:hover {
        background: rgba(52, 90, 116, 0.8);
    }

    .nav-links a.active {
        background: linear-gradient(90deg, var(--accent) 0%, var(--accent-hover) 100%);
    }
}

/* 容器 */
.admin-container {
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 40px;
}

.admin-container > h1 {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

/* 卡片 */
.card {
    background: var(--surface);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

/* 消息提示 */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.5;
}

.alert-success {
    background: #e8f5e9;
    color: #2e7d32;
}

.alert-error {
    background: #ffebee;
    color: #c62828;
}

/* 表单 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background: var(--surface);
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.btn-primary {
    background: var(--nav-dark);
    color: #fff;
    box-shadow: 0 2px 8px rgba(44,62,80,0.10);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 6px 20px rgba(44,62,80,0.18);
    transform: translateY(-2px) scale(1.04);
}

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

.btn-secondary:hover {
    background: var(--bg);
}

.btn-link {
    color: var(--accent);
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    font-size: 14px;
}

.btn-link:hover {
    text-decoration: underline;
}

.text-danger {
    color: var(--error);
}

/* 表格 */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--bg);
}

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

.data-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

/* 可排序表头 */
.sortable {
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-right: 20px !important;
    transition: background-color 0.2s ease;
}

.sortable:hover {
    background-color: var(--bg-solid) !important;
}

.sort-indicator {
    font-size: 12px;
    color: var(--primary);
    margin-left: 5px;
    font-weight: bold;
}

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

.text-center {
    text-align: center;
}

/* 状态标签 */
.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.status-success {
    background: #e8f5e9;
    color: #2e7d32;
}

.status-warning {
    background: #fff3e0;
    color: #ef6c00;
}

.status-secondary {
    background: #f5f5f5;
    color: #757575;
}

/* 工具栏 */
.toolbar {
    margin-bottom: 20px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--surface);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.stat-card .number {
    font-size: 40px;
    font-weight: 600;
    color: var(--nav-dark);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

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

/* 登录页面 */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 20px;
}

.login-container {
    background: var(--surface);
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--shadow-hover);
    width: 100%;
    max-width: 420px;
}

.login-container h1 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 32px;
    letter-spacing: -0.01em;
}

/* 响应式 */
@media (max-width: 768px) {
    .admin-container {
        padding: 0 20px;
    }
    
    .nav-links {
        padding: 0 20px;
        overflow-x: auto;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Tab切换样式 */
.tab-container {
    margin-bottom: 20px;
}

.tab-nav {
    display: flex;
    gap: 8px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0;
}

.tab-link {
    padding: 12px 20px;
    background: transparent;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px 8px 0 0;
    transition: all 0.2s;
    font-weight: 500;
    border: 2px solid transparent;
    margin-bottom: -2px;
}

.tab-link:hover {
    background: var(--bg-solid);
    color: var(--text);
}

.tab-link.active {
    background: var(--surface);
    color: var(--accent);
    border-color: var(--border);
    border-bottom-color: var(--surface);
}

/* 搜索表单样式 */
.search-form {
    margin-bottom: 20px;
}

.search-form .form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    align-items: end;
}

.search-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.search-form .form-group label {
    font-weight: 500;
    font-size: 14px;
    color: var(--text);
}

.search-form .form-group input,
.search-form .form-group select {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.search-form .form-group input:focus,
.search-form .form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.pagination .current-page {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: var(--accent);
    color: white;
    border-radius: 6px;
    font-weight: 500;
}

.pagination-info {
    text-align: center;
    margin-top: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* 数据表格样式增强 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

.data-table thead th {
    background: var(--bg-solid);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    color: var(--text);
    border-bottom: 2px solid var(--border);
}

.data-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

.data-table tbody tr:hover {
    background: var(--bg-solid);
}

.data-table .text-center {
    text-align: center;
}

/* 按钮链接样式 */
.btn-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.btn-link:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.btn-link.text-danger {
    color: var(--error);
}

.btn-link.text-danger:hover {
    color: #d32f2f;
}

/* 状态标签样式 */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-success {
    background: #e8f5e9;
    color: #2e7d32;
}

.status-warning {
    background: #fff3e0;
    color: #f57c00;
}

.status-error {
    background: #ffebee;
    color: #c62828;
}

.status-secondary {
    background: #f5f5f5;
    color: #616161;
}

.status-info {
    background: #e3f2fd;
    color: #1565c0;
}

/* 成功按钮 */
.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #2ea644;
}