/* 全局变量 */
:root {
    --iheir-primary: #0073aa;
    --iheir-primary-dark: #005a87;
    --iheir-text: #333;
    --iheir-bg: #fff;
    --iheir-gray: #f5f5f5;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--iheir-text);
    background: var(--iheir-bg);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 头部 */
.site-header {
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.site-branding img {
    max-height: 50px;
    width: auto;
}
.main-navigation ul {
    list-style: none;
    display: flex;
    gap: 20px;
}
.main-navigation a {
    text-decoration: none;
    color: var(--iheir-text);
    font-weight: 500;
}
.main-navigation a:hover {
    color: var(--iheir-primary);
}
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

/* 首页 Hero */
.hero {
    background: linear-gradient(135deg, var(--iheir-primary), var(--iheir-primary-dark));
    color: white;
    text-align: center;
    padding: 100px 0;
}
.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}
.hero .btn {
    display: inline-block;
    background: white;
    color: var(--iheir-primary);
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
    transition: all 0.3s;
}
.hero .btn:hover {
    background: var(--iheir-primary-dark);
    color: white;
}

/* 服务区块 */
.services {
    padding: 80px 0;
    text-align: center;
}
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}
.service-item {
    padding: 20px;
    background: var(--iheir-gray);
    border-radius: 8px;
    transition: transform 0.3s;
}
.service-item:hover {
    transform: translateY(-5px);
}
.service-item i {
    font-size: 40px;
    color: var(--iheir-primary);
    margin-bottom: 20px;
}
.service-item h3 {
    margin-bottom: 10px;
}

/* 按钮通用 */
.btn-primary-bg {
    background-color: var(--iheir-primary);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}
.btn-primary-bg:hover {
    background-color: var(--iheir-primary-dark);
}

/* 页脚 */
.site-footer {
    background: #222;
    color: #ccc;
    padding: 40px 0 20px;
    margin-top: 60px;
}
.footer-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 30px;
}
.footer-contact p {
    margin-bottom: 8px;
}
.footer-menu ul {
    list-style: none;
}
.footer-menu a {
    color: #ccc;
    text-decoration: none;
}
.copyright {
    text-align: center;
    border-top: 1px solid #444;
    padding-top: 20px;
    font-size: 14px;
}

/* 文章页 */
.entry-header {
    margin-bottom: 20px;
}
.entry-meta {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}
.entry-content {
    margin-bottom: 30px;
}

/* ========== 新增：分类/标签归档页网格布局 ========== */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.grid-item {
    background: var(--iheir-bg);
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.post-thumbnail img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.grid-item .entry-content {
    padding: 20px;
}

.grid-item .entry-title {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.grid-item .entry-title a {
    text-decoration: none;
    color: var(--iheir-text);
}

.grid-item .entry-title a:hover {
    color: var(--iheir-primary);
}

.entry-meta {
    font-size: 0.85rem;
    color: #777;
    margin-bottom: 15px;
}

.entry-summary {
    font-size: 0.9rem;
    line-height: 1.5;
}

.archive-header {
    text-align: center;
    margin-bottom: 40px;
}

.archive-title {
    font-size: 2rem;
    margin-bottom: 15px;
}

.archive-description {
    color: #666;
    max-width: 800px;
    margin: 0 auto;
}

/* 分页样式 */
.pagination {
    text-align: center;
    margin: 40px 0;
}

.pagination .page-numbers {
    display: inline-block;
    padding: 8px 12px;
    margin: 0 3px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: var(--iheir-text);
}

.pagination .page-numbers.current {
    background: var(--iheir-primary);
    color: #fff;
    border-color: var(--iheir-primary);
}

.pagination .page-numbers:hover:not(.current) {
    background: #f5f5f5;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .posts-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}
/* 作品集网格布局 */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.portfolio-item {
    background: var(--iheir-bg);
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.portfolio-thumbnail img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.portfolio-content {
    padding: 20px;
}

.portfolio-title {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.portfolio-title a {
    text-decoration: none;
    color: var(--iheir-text);
}

.portfolio-title a:hover {
    color: var(--iheir-primary);
}

.portfolio-excerpt {
    font-size: 0.9rem;
    line-height: 1.5;
}