/* 精致美化样式 - 统一设计系统 */

/* ========== 全局变量 ========== */
:root {
    /* 主色调 */
    --primary-color: #409EFF;
    --primary-hover: #66b1ff;
    --primary-active: #3a8ee6;
    --primary-light: #ecf5ff;
    
    /* 功能色 */
    --success-color: #67c23a;
    --warning-color: #e6a23c;
    --danger-color: #f56c6c;
    --info-color: #909399;
    
    /* 中性色 */
    --text-primary: #303133;
    --text-regular: #606266;
    --text-secondary: #909399;
    --text-placeholder: #c0c4cc;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-tertiary: #f0f2f5;
    
    /* 边框色 */
    --border-base: #dcdfe6;
    --border-light: #e4e7ed;
    --border-lighter: #ebeef5;
    --border-extra-light: #f2f6fc;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-base: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-base: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-base: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    
    /* 过渡动画 */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 全局重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #eef2f7 100%);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== 导航栏美化 ========== */
.navbar {
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-bottom: none;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1000;
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.navbar > * {
    position: relative;
    z-index: 1;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 0.5px;
    transition: var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.nav-item {
    padding: 10px 18px;
    border-radius: var(--radius-base);
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition-base);
}

.nav-item:hover::before {
    left: 0;
}

.nav-item:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    font-weight: 600;
}

.navbar-right {
    color: rgba(255, 255, 255, 0.9);
}

.navbar-right a {
    color: rgba(255, 255, 255, 0.9);
    transition: var(--transition-base);
}

.navbar-right a:hover {
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* ========== 卡片美化 ========== */
.card {
    background: var(--bg-primary);
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-base);
    padding: var(--spacing-md);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transition: var(--transition-base);
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-title {
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-sub {
    color: var(--success-color);
    font-size: 12px;
    margin-top: 6px;
    font-weight: 500;
}

/* ========== 按钮美化 ========== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-base);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-default {
    background: var(--bg-primary);
    color: var(--text-regular);
    border: 1px solid var(--border-base);
    box-shadow: var(--shadow-sm);
}

.btn-default:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: var(--shadow-base);
    transform: translateY(-1px);
}

.btn-danger {
    background: linear-gradient(135deg, #f56c6c 0%, #e85a5a 100%);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(245, 108, 108, 0.4);
}

.btn-danger:hover {
    box-shadow: 0 6px 16px rgba(245, 108, 108, 0.5);
    transform: translateY(-2px);
}

/* ========== 表格美化 ========== */
.table-container {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-base);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

th {
    background: linear-gradient(135deg, #f8f9fa 0%, #f0f2f5 100%);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
    padding: 16px;
    text-align: left;
    border-bottom: 2px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 10;
}

td {
    padding: 16px;
    border-bottom: 1px solid var(--border-extra-light);
    color: var(--text-regular);
    font-size: 14px;
    transition: var(--transition-fast);
}

tr {
    transition: var(--transition-fast);
}

tr:hover {
    background: var(--primary-light);
}

tr:last-child td {
    border-bottom: none;
}

/* ========== 表单美化 ========== */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-base);
    border-radius: var(--radius-base);
    font-size: 14px;
    transition: var(--transition-base);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}

.required {
    color: var(--danger-color);
    margin-right: 4px;
}

/* ========== 搜索表单美化 ========== */
.search-form {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-base);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-lighter);
}

/* ========== 页面标题美化 ========== */
.page-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-base);
    border-bottom: 2px solid var(--border-extra-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.page-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========== 标签美化 ========== */
.tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    background: var(--primary-light);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    display: inline-block;
    box-shadow: var(--shadow-sm);
}

.status-published {
    background: linear-gradient(135deg, #f6ffed 0%, #d9f7be 100%);
    color: #52c41a;
}

.status-draft {
    background: linear-gradient(135deg, #fff7e6 0%, #ffe7ba 100%);
    color: #d46b08;
}

/* ========== 侧边栏美化 ========== */
.sidebar {
    background: var(--bg-primary);
    border-right: 1px solid var(--border-lighter);
    box-shadow: var(--shadow-sm);
}

.menu-item {
    padding: 14px 24px;
    cursor: pointer;
    transition: var(--transition-base);
    border-left: 3px solid transparent;
    color: var(--text-regular);
    font-size: 14px;
    position: relative;
}

.menu-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleY(0);
    transition: var(--transition-base);
}

.menu-item:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    padding-left: 28px;
}

.menu-item:hover::before {
    transform: scaleY(1);
}

.menu-item.active {
    background: linear-gradient(90deg, var(--primary-light) 0%, rgba(102, 126, 234, 0.05) 100%);
    color: var(--primary-color);
    font-weight: 600;
    border-left-color: var(--primary-color);
}

.menu-item.active::before {
    transform: scaleY(1);
}

/* ========== 内容区域美化 ========== */
.content {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-base);
    padding: var(--spacing-md);
    margin: var(--spacing-base);
}

/* ========== 分页美化 ========== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: var(--spacing-base);
    background: var(--bg-secondary);
    border-radius: var(--radius-base);
}

/* ========== 操作链接美化 ========== */
.action-link {
    color: var(--primary-color);
    cursor: pointer;
    margin-right: 16px;
    font-size: 14px;
    transition: var(--transition-base);
    position: relative;
    padding-bottom: 2px;
}

.action-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-base);
}

.action-link:hover {
    color: var(--primary-hover);
}

.action-link:hover::after {
    width: 100%;
}

.action-link.danger {
    color: var(--danger-color);
}

.action-link.danger::after {
    background: var(--danger-color);
}

/* ========== 加载动画 ========== */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* ========== 响应式优化 ========== */
@media (max-width: 768px) {
    .navbar {
        height: 56px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .content {
        margin: var(--spacing-sm);
        padding: var(--spacing-base);
    }
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-base);
    border-radius: 4px;
    transition: var(--transition-base);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}