/* 现代化简约风格 - 参考小红书设计 */

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ff2442;
    --primary-hover: #ff4757;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --border-color: #f0f0f0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    right: 18px;
    bottom: 18px;
    width: 44px;
    height: 44px;
    border-radius: 999px;
    border: 1px solid rgba(0,0,0,0.08);
    background: rgba(255,255,255,0.95);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 9999;
    font-size: 20px;
    font-weight: 800;
    line-height: 1;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    border-color: rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .back-to-top {
        right: 14px;
        bottom: 14px;
        width: 40px;
        height: 40px;
    }
}

/* 头部样式 - 简洁清爽 */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.logo a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.logo a:hover {
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 400;
    padding: 6px 0;
    position: relative;
    transition: color 0.2s;
}

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

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

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.mobile-menu-toggle:hover {
    background: var(--bg-secondary);
}

/* 主内容区 - 大留白 */
.main {
    min-height: calc(100vh - 200px);
    padding: 32px 0 64px;
}

/* Hero区域 - 简洁设计 */
.hero {
    text-align: center;
    padding: 80px 32px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    margin-bottom: 48px;
    box-shadow: var(--shadow-sm);
}

.hero h2 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* 栏目网格 - 卡片式设计 */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.category-card {
    background: var(--bg-primary);
    padding: 32px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.category-card h3 {
    margin-bottom: 12px;
    font-size: 20px;
    font-weight: 600;
}

.category-card h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.category-card:hover h3 a {
    color: var(--primary-color);
}

.category-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

/* ===== 首页栏目卡片（新增，参考你图） ===== */
.home-categories-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
    margin-bottom: 48px;
}

.home-cat-card {
    position: relative;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    text-decoration: none;
    background: #f5f5f5;
    border-radius: 12px;
    padding: 26px 26px;
    border: 1px solid #f0f0f0;
    min-height: 140px;
    transition: all .2s ease;
}

.home-cat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: #f2f2f2;
}

.home-cat-badge {
    position: absolute;
    left: 14px;
    top: 14px;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: var(--primary-color);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.home-cat-icon {
    width: 96px;
    height: 96px;
    border-radius: 999px;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 700;
    color: #9b9b9b;
    flex: 0 0 96px;
}

.home-cat-icon-img{
    width: 44px;
    height: 44px;
    object-fit: contain;
    display: block;
}

.home-cat-icon-placeholder{
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: #eee;
    display: block;
}

.home-cat-body {
    min-width: 0;
    padding-top: 2px;
}

.home-cat-title {
    font-size: 24px;
    font-weight: 800;
    color: #111;
    line-height: 1.15;
    margin-bottom: 10px;
}

.home-cat-desc {
    font-size: 14px;
    color: #7a7a7a;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@media (max-width: 1100px) {
    .home-categories-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .home-categories-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .home-cat-card {
        padding: 18px;
        min-height: 120px;
    }

    .home-cat-icon {
        width: 78px;
        height: 78px;
        flex-basis: 78px;
        font-size: 30px;
    }

    .home-cat-title {
        font-size: 20px;
    }

    .home-cat-desc {
        font-size: 13px;
    }
}

/* 分页样式 */
.pagination {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin: 22px 0 10px;
}

.pagination a {
    display: inline-block;
    padding: 8px 12px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-secondary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.pagination a:hover {
    color: var(--primary-color);
    border-color: rgba(255, 36, 66, 0.25);
    background: rgba(255, 36, 66, 0.06);
}

.pagination a.active {
    color: #fff;
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* 栏目页面样式 */
.category-header {
    background: var(--bg-primary);
    padding: 40px 32px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 32px;
    border: 1px solid var(--border-color);
}

.category-header h1 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.category-desc {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-top: 8px;
}

/* 内容列表容器 */
.content-list {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

/* 最新内容区域 */
.latest-contents {
    background: var(--bg-primary);
    padding: 40px 32px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.latest-contents h2 {
    margin-bottom: 32px;
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
}

.content-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* 内容项 - 卡片式设计 */
.content-item {
    padding: 24px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.2s;
}

.content-item:first-child {
    padding-top: 0;
}

.content-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.content-item:hover {
    padding-left: 8px;
}

.content-item h2,
.content-item h3 {
    margin-bottom: 12px;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.5;
}

.content-item h2 a,
.content-item h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
    display: block;
}

.content-item h2 a:hover,
.content-item h3 a:hover {
    color: var(--primary-color);
}

.content-item .meta {
    color: var(--text-light);
    font-size: 13px;
    margin-bottom: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

.content-item .meta span {
    display: inline-flex;
    align-items: center;
}

.content-item .meta a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

.content-item .meta a:hover {
    opacity: 0.8;
}

.content-item .excerpt {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 14px;
    margin: 0;
}

.empty {
    text-align: center;
    color: var(--text-light);
    padding: 80px 20px;
    font-size: 15px;
}

/* 单页内容 */
.page-content {
    background: var(--bg-primary);
    padding: 48px 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.page-content h1 {
    margin-bottom: 24px;
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.page-content .content {
    line-height: 1.8;
    color: var(--text-secondary);
    font-size: 15px;
}

.page-content .content p {
    margin-bottom: 16px;
}

/* 内容详情页 */
.content-detail {
    background: var(--bg-primary);
    padding: 48px 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.content-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
    margin-bottom: 32px;
}

.content-header h1 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    line-height: 1.4;
}

.content-meta {
    color: var(--text-light);
    font-size: 13px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
}

.content-meta span {
    display: inline-flex;
    align-items: center;
}

.content-meta a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

.content-meta a:hover {
    opacity: 0.8;
}

.content-body {
    line-height: 1.8;
    color: var(--text-secondary);
    font-size: 15px;
}

.content-body p {
    margin-bottom: 16px;
}

.content-body h1,
.content-body h2,
.content-body h3,
.content-body h4,
.content-body h5,
.content-body h6 {
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--text-primary);
    font-weight: 600;
}

.content-body h2 {
    font-size: 24px;
    letter-spacing: -0.3px;
}

.content-body h3 {
    font-size: 20px;
}

.content-body ul,
.content-body ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.content-body li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.content-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    margin: 24px 0;
    box-shadow: var(--shadow-sm);
}

/* 页脚 - 简洁设计 */
.footer {
    background: var(--bg-primary);
    color: var(--text-secondary);
    text-align: center;
    padding: 40px 0;
   /* margin-top: 64px;*/
    border-top: 1px solid var(--border-color);
    font-size: 13px;
}
.footer p {
    margin: 10px;
}
.footer a {
    color: var(--text-secondary);
    text-decoration: none;
}
/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .header .container {
        padding: 12px 16px;
    }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 16px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
    }

    .nav.active {
        display: flex;
    }

    .nav a {
        padding: 12px 0;
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav a:last-child {
        border-bottom: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .main {
        padding: 24px 0 48px;
    }

    .hero {
        padding: 48px 24px;
        margin-bottom: 32px;
    }

    .hero h2 {
        font-size: 28px;
    }

    .hero p {
        font-size: 15px;
    }

    .categories-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 32px;
    }

    .category-card {
        padding: 24px 20px;
    }

    .latest-contents,
    .content-list,
    .category-header,
    .page-content,
    .content-detail {
        padding: 24px 20px;
    }

    .latest-contents h2 {
        font-size: 20px;
        margin-bottom: 24px;
    }

    .content-item {
        padding: 20px 0;
    }

    .content-header h1,
    .page-content h1,
    .category-header h1 {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 32px 16px;
    }

    .hero h2 {
        font-size: 24px;
    }

    .category-card {
        padding: 20px 16px;
    }

    .latest-contents,
    .content-list,
    .category-header,
    .page-content,
    .content-detail {
        padding: 20px 16px;
    }
}