/* 极光蓝暗黑主题 */
:root {
    --primary-color: #4cc9f0;
    --secondary-color: #4895ef;
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent-color: #f72585;
    --border-color: #334155;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

a:hover {
    color: var(--accent-color);
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 3D立体头部 */
header {
    background-color: rgba(15, 23, 42, 0.95);
    padding: 1.25rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.025em;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    padding: 0.5rem 0;
    font-weight: 500;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

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

/* 不对称内容布局 */
.main-content {
    margin: 2.5rem 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.content-card {
    background-color: var(--dark-card);
    border-radius: 1rem;
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-card:hover {
    transform: translateY(-0.5rem);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.75rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 3rem;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), transparent);
}

/* 蜂窝网格布局 */
.article-honeycomb {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.article-cell {
    position: relative;
    aspect-ratio: 1/1;
    overflow: hidden;
    border-radius: 0.75rem;
    isolation: isolate;
}

.article-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.article-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.8));
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1rem;
}

.article-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: white;
}

.article-meta {
    display: flex;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 文章详情页 */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
}

.article-header {
    margin-bottom: 2rem;
    text-align: center;
}

.article-detail-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.article-detail-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.article-detail-image {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border-radius: 1rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.article-content {
    line-height: 1.8;
    font-size: 1.1rem;
}

.article-content p {
    margin-bottom: 1.5rem;
}

/* 分页导航 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
}

.pagination-link {
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    background-color: var(--dark-card);
    border: 1px solid var(--border-color);
    font-weight: 500;
    transition: all 0.3s ease;
}

.pagination-link:hover {
    background-color: var(--primary-color);
    color: var(--dark-bg);
    border-color: var(--primary-color);
}

/* 友情链接 - 波浪效果 */
.friend-links {
    margin: 3rem 0;
    position: relative;
    overflow: hidden;
    border-radius: 1rem;
    padding: 2rem;
    background-color: var(--dark-card);
    border: 1px solid var(--border-color);
}

.friend-links::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(72, 149, 239, 0.1),
        transparent
    );
    transform: translateX(-100%);
    animation: wave 3s infinite linear;
}

@keyframes wave {
    100% {
        transform: translateX(100%);
    }
}

.friend-links h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.friend-links h3::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), transparent);
}

.friend-links-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.friend-link {
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    background-color: rgba(15, 23, 42, 0.7);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.friend-link:hover {
    background-color: var(--primary-color);
    color: var(--dark-bg);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* 页脚 - 极光效果 */
footer {
    background-color: var(--dark-card);
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(
        90deg,
        var(--primary-color),
        var(--accent-color),
        var(--primary-color)
    );
    animation: aurora 8s linear infinite;
    background-size: 200% 100%;
}

@keyframes aurora {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .article-honeycomb {
        grid-template-columns: 1fr;
    }

    .article-cell {
        aspect-ratio: 16/9;
    }
}