/* 关键CSS - 首屏渲染所需的最小样式集 */

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

:root {
    --primary-color: #ff2442;
    --secondary-color: #333333;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --dark-gray: #9e9e9e;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--secondary-color);
    background-color: var(--light-gray);
    line-height: 1.6;
    font-display: swap;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
}

img {
    max-width: 100%;
    height: auto;
    image-rendering: -webkit-optimize-contrast;
}

/* 头部样式 */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

.header-sticky {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 5px 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.mobile-menu-toggle {
    z-index: 101;
    touch-action: manipulation;
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-link {
    font-weight: 500;
    transition: color 0.3s;
    touch-action: manipulation;
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.search-container {
    display: flex;
    align-items: center;
    background-color: var(--light-gray);
    border-radius: 20px;
    padding: 6px 16px;
    width: 250px;
}

.search-input {
    background: transparent;
    border: none;
    outline: none;
    flex: 1;
    padding: 4px 0;
}

/* 主内容样式 */
.main-content {
    padding: 20px 0;
}

/* 移动端特定关键样式 */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 0;
    }
    
    .search-container {
        order: 3;
        width: 100%;
        margin-top: 10px;
    }
    
    .nav-links {
        gap: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}