/* ========== 基础样式 ========== */
:root {
    --primary: #c41e3a;
    --primary-dark: #a01830;
    --success: #52c41a;
    --warning: #faad14;
    --danger: #ff4d4f;
    --text: #333;
    --text-secondary: #666;
    --border: #e8e8e8;
    --bg: #f5f5f5;
    --white: #fff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* ========== 布局 ========== */
#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 桌面端头部 */
.header {
    background: var(--primary);
    color: var(--white);
    padding: 0 24px;
}

.header h1 {
    font-size: 20px;
    padding: 16px 0;
}

.header nav {
    display: flex;
    gap: 4px;
    padding-bottom: 12px;
}

.header nav a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.3s;
}

.header nav a:hover,
.header nav a.active {
    background: rgba(255,255,255,0.15);
    color: var(--white);
}

/* 移动端头部 */
.mobile-header-content {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
}

.mobile-logo {
    font-size: 24px;
}

.mobile-title {
    font-size: 18px;
    font-weight: 500;
}

/* ========== 主内容区域 ========== */
main {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

/* ========== 卡片 ========== */
.card {
    background: var(--white);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 8px 16px;
    border-radius: 4px;
    border: none;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

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

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

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

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

/* ========== 表格 ========== */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table th {
    background: #fafafa;
    font-weight: 500;
    color: var(--text-secondary);
}

.data-table tr:hover {
    background: #fafafa;
}

/* ========== 标签 ========== */
.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    line-height: 1.5;
}

.tag-draft { background: #e6f7ff; color: #1890ff; }
.tag-pending { background: #fff7e6; color: #faad14; }
.tag-approved { background: #f6ffed; color: #52c41a; }
.tag-rejected { background: #fff1f0; color: #ff4d4f; }
.tag-warning { background: #fff7e6; color: #faad14; }
.tag-normal { background: #f6ffed; color: #52c41a; }

/* ========== 表单 ========== */
.form-row {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    flex: 1;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.3s;
}

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

/* ========== 操作按钮组 ========== */
.action-btns {
    display: flex;
    gap: 8px;
}

/* ========== 底部导航 ========== */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 56px;
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
}

.mobile-bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    height: 100%;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 11px;
    transition: all 0.3s;
}

.mobile-bottom-nav a .nav-icon {
    font-size: 20px;
    line-height: 1;
    margin-bottom: 2px;
}

.mobile-bottom-nav a.active {
    color: var(--primary);
}

/* ========== 响应式 ========== */
.desktop-only {
    display: block;
}

.mobile-only {
    display: none;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .desktop-only {
        display: none;
    }
    
    .mobile-only {
        display: block;
    }
    
    main {
        padding: 12px;
        padding-bottom: 72px; /* 为底部导航留出空间 */
    }
    
    .form-row {
        flex-direction: column;
        gap: 12px;
    }
    
    .card {
        padding: 16px;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px 12px;
    }
}

/* 警告行 */
.warning-row {
    background: #fff7e6;
}

/* 加载状态 */
.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
}

/* 空数据提示 */
.empty-tip {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
}