:root {
    --primary-red: #d32f2f;
    --soft-red: #ffebee;
    --text-dark: #333333;
    --text-light: #777777;
    --border-color: #eaeaea;
    --bg-white: #ffffff;
    --shadow-light: rgba(0, 0, 0, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', '微软雅黑', sans-serif;
}

body {
    background-color: var(--bg-white);
    color: var(--text-dark);
    line-height: 1.6;
}

header {
    background-color: var(--bg-white);
    position: fixed;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 15px var(--shadow-light);
    border-bottom: 1px solid var(--border-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo-link {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 18px;
    transition: all 0.3s;
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.nav-active {
    color: var(--primary-red);
    background-color: var(--soft-red);
}

.download-btn {
    background-color: var(--primary-red);
    color: white;
    padding: 10px 25px;
    border-radius: 30px;
    font-weight: bold;
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s;
}

.download-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.news-page {
    padding: 140px 0 80px;
}

.news-page-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 40px;
    text-align: center;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--border-color);
}

.news-card {
    display: flex;
    flex-direction: column;
    padding: 32px 28px 28px;
    text-decoration: none;
    color: inherit;
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    transition: background-color 0.25s ease;
    min-height: 200px;
}

.news-card:nth-child(3n) {
    border-right: none;
}

.news-card:hover {
    background-color: var(--soft-red);
}

.news-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.55;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card .news-excerpt {
    flex: 1;
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card .news-date {
    font-size: 13px;
    color: #b0b0b0;
}

.site-footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
}

.site-footer a {
    color: var(--text-light);
    text-decoration: none;
}

.site-footer a:hover {
    color: var(--primary-red);
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .news-card:nth-child(3n) {
        border-right: 1px solid var(--border-color);
    }

    .news-card:nth-child(2n) {
        border-right: none;
    }
}

@media (max-width: 576px) {
    .news-page {
        padding: 120px 0 60px;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .news-card,
    .news-card:nth-child(3n) {
        border-right: none;
    }
}