/* 通用排版优化 */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.4;
}

h1 {
    font-size: 2rem;
    margin: 1.5em 0 0.8em;
}

h2 {
    font-size: 1.5rem;
    margin: 1.5em 0 0.6em;
}

h3 {
    font-size: 1.25rem;
    margin: 1.2em 0 0.5em;
}

p {
    margin: 1em 0;
    line-height: 1.8;
}

/* 文章页 */
.post-article time {
    display: inline-block;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.post-meta {
    color: var(--text-secondary);
    font-size: 0.9em;
    margin-left: 1em;
}

.post-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-top: 3em;
    padding-top: 1.5em;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.95em;
}

.post-nav-next {
    text-align: right;
}

.back-home {
    margin-top: 2em;
    text-align: center;
}

.back-home a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5em 1em;
    border-radius: 4px;
    transition: background 0.2s ease;
}

.back-home a:hover {
    background: var(--accent-light);
}

@media (max-width: 640px) {
    .post-nav {
        flex-direction: column;
        align-items: flex-start;
    }

    .post-nav-next {
        text-align: left;
    }
}

/* 归档页 */
.archive-year {
    font-size: 1.2em;
    font-weight: 700;
    margin: 1.5em 0 0.8em;
    color: var(--text-primary);
}

.archive-list {
    list-style: none;
    padding-left: 0;
}

.archive-item {
    margin: 0.8em 0;
    padding: 0.5em 0;
    border-bottom: 1px dashed var(--border);
}

.archive-date {
    color: var(--text-secondary);
    font-size: 0.9em;
    min-width: 80px;
    display: inline-block;
}

.archive-category {
    color: var(--text-secondary);
    font-size: 0.85em;
    margin-left: 8px;
    opacity: 0.7;
}

/* 文章链接 */
.post-article a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--border);
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.post-article a:hover {
    color: var(--text-primary);
    text-decoration-color: var(--accent);
}

/* 首页 */
.home-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 2.5em;
    font-size: 1em;
    letter-spacing: 0.5px;
}

.home-list {
    list-style: none;
    padding-left: 0;
}

.home-list li {
    margin: 1em 0;
    padding: 1em 1.2em;
    border-radius: 4px;
    transition: background 0.2s ease;
}

.home-list li:hover {
    background: var(--accent-light);
}

.home-list li a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

.home-list li a:hover {
    color: var(--accent);
}

.home-date {
    color: var(--text-secondary);
    font-size: 0.85em;
    margin-left: 1em;
}

.post-category {
    color: var(--text-secondary);
    font-size: 0.85em;
    opacity: 0.8;
    margin-left: 0.5em;
}

/* 关于页 */
.about-section {
    margin: 2em 0;
    padding: 1.5em;
    background: var(--accent-light);
    border-radius: 4px;
}

.about-section h2 {
    margin-top: 0;
}

.about-links {
    list-style: none;
    padding-left: 0;
}

.about-links li {
    margin: 0.8em 0;
}

.about-links a {
    color: var(--accent);
    text-decoration: none;
    padding: 0.3em 0.6em;
    border-radius: 4px;
    transition: background 0.2s ease;
}

.about-links a:hover {
    background: var(--accent-light);
}

/* 返回首页链接 */
.return-home {
    display: inline-block;
    margin-top: 2em;
    padding: 0.6em 1.2em;
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    transition: all 0.2s ease;
}

.return-home:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background: var(--accent-light);
}

/* 代码复制按钮 */
.code-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 8px;
    font-size: 12px;
    background: var(--accent-light);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: 10;
}

pre:hover .code-copy-btn,
.highlight:hover .code-copy-btn {
    opacity: 1;
}

.code-copy-btn:hover {
    background: var(--hover);
}

.code-copy-btn.copied {
    background: #4caf50;
    color: white;
    border-color: #4caf50;
}

/* 图片点击放大 */
.post-article img {
    cursor: zoom-in;
    transition: transform 0.2s ease;
}

.post-article img:active {
    cursor: zoom-out;
}

/* 图片灯箱容器 */
.lightbox-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    cursor: zoom-out;
}

.lightbox-overlay.active {
    display: flex;
}

.lightbox-overlay img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    cursor: default;
}

/* Giscus 评论区域 */
.comments-section {
    margin-top: 3em;
    padding-top: 2em;
    border-top: 1px solid var(--border);
}

.comments-section h2 {
    font-size: 1.3em;
    margin-bottom: 1em;
}