/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    padding-bottom: 60px; /* 底部导航栏高度 */
}

/* 顶部导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 44px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 16px;
}

.header-title {
    font-size: 18px;
    font-weight: 600;
}

.header-icon {
    font-size: 24px;
    cursor: pointer;
}

/* 底部导航栏 */
.tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: white;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
    z-index: 1000;
}

.tabbar-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tabbar-icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.tabbar-text {
    font-size: 12px;
    color: #666;
}

.tabbar-item.active .tabbar-text {
    color: #667eea;
    font-weight: 600;
}

.tabbar-item.active .tabbar-icon {
    transform: scale(1.1);
}

/* 页面内容区域 */
.page-content {
    padding-top: 44px;
    min-height: calc(100vh - 104px);
}

/* 区块标题 */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.section-more {
    font-size: 14px;
    color: #999;
    text-decoration: none;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px 0;
    color: #999;
}

.loading::after {
    content: '加载中...';
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-text {
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 375px) {
    .header-title {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 16px;
    }
}