/*
Theme Name: bian_mb4
Theme URI: https://www.binance.com/
Author: 币安研究团队
Author URI: https://www.binance.com/
Description: 一款以币安品牌视觉为设计灵感的深色系 WordPress 主题，适用于加密货币资讯、区块链行业博客及数字资产品牌展示。支持首页模块化、文章列表与详情页，具备响应式布局与优秀的 SEO 基础结构。
Version: 1.0.0
Requires at least: 5.8
Tested up to: 6.5
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: bian_mb4
Tags: 深色主题, 黑色背景, 黄色强调色, 加密货币, 区块链, 博客, 响应式, 自定义菜单, 专栏文章, SEO友好
*/

/* ==========================================================================
   一、设计变量 Design Tokens
   ========================================================================== */
:root {
    --bg-primary: #0B0E11;
    --bg-secondary: #181A20;
    --bg-card: #1E2329;
    --bg-hover: #2B3139;
    --border-color: #2B3139;
    --text-primary: #EAECEF;
    --text-secondary: #848E9C;
    --text-tertiary: #5E6673;
    --accent-yellow: #FCD535;
    --accent-yellow-hover: #F0C820;
    --accent-yellow-dark: #C9A010;
    --green-up: #03A66D;
    --red-down: #CF304A;
    --btn-radius: 8px;
    --card-radius: 12px;
    --font-xs: 12px;
    --font-sm: 14px;
    --font-md: 16px;
    --font-lg: 18px;
    --font-xl: 24px;
    --font-2xl: 32px;
    --font-3xl: 40px;
    --font-4xl: 48px;
    --font-5xl: 56px;
    --max-width: 1200px;
    --content-width: 820px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-yellow: 0 4px 20px rgba(252, 213, 53, 0.3);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

/* ==========================================================================
   二、重置与基础样式 Reset & Base
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    font-size: var(--font-md);
    letter-spacing: -0.01em;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    color: var(--accent-yellow);
}
a:focus-visible {
    outline: 2px solid var(--accent-yellow);
    outline-offset: 3px;
    border-radius: 4px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* WordPress Core 图像样式兼容 */
.alignleft {
    float: left;
    margin-right: 1.5rem;
}
.alignright {
    float: right;
    margin-left: 1.5rem;
}
.aligncenter {
    clear: both;
    display: block;
    margin-left: auto;
    margin-right: auto;
}
.wp-caption {
    max-width: 100%;
    margin-bottom: 1.5rem;
}
.wp-caption-text {
    font-size: var(--font-sm);
    color: var(--text-tertiary);
    text-align: center;
    padding: 8px 0;
}
.sticky {
    position: relative;
}
.sticky::before {
    content: "置顶";
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent-yellow);
    color: var(--bg-primary);
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 0 var(--card-radius) 0 8px;
    z-index: 2;
}
.screen-reader-text {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ==========================================================================
   三、顶部导航栏 Header & Navigation
   ========================================================================== */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(11, 14, 17, 0.92);
}
.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 20px;
}
.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-icon {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
}
.logo-text {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    white-space: nowrap;
}
.logo-text span {
    color: var(--accent-yellow);
}
.nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            flex-shrink: 0;
        }
        .nav-links a {
            font-size: var(--font-sm);
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
            white-space: nowrap;
            padding: 6px 0;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text-primary);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-yellow);
            border-radius: 1px;
            transition: width var(--transition-normal);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .header-btns {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

/* WordPress 导航菜单 */
.site-navigation {
    flex-shrink: 0;
}
.site-navigation ul {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.site-navigation li {
    position: relative;
}
.site-navigation a {
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    white-space: nowrap;
    padding: 6px 0;
    position: relative;
    display: inline-block;
}
.site-navigation a:hover {
    color: var(--text-primary);
}
.site-navigation .current-menu-item > a,
.site-navigation .current_page_item > a,
.site-navigation .current_page_parent > a {
    color: var(--accent-yellow);
}
.site-navigation .current-menu-item > a::after,
.site-navigation .current_page_item > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-yellow);
    border-radius: 1px;
}
.site-navigation a:hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-yellow);
    border-radius: 1px;
}

.header-btns {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--btn-radius);
    padding: 8px 12px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: var(--font-sm);
    min-height: 40px;
    align-items: center;
    gap: 6px;
}
.menu-toggle:hover {
    color: var(--accent-yellow);
    border-color: var(--accent-yellow);
}

/* ==========================================================================
   四、按钮样式 Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: var(--font-sm);
    font-weight: 600;
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    white-space: nowrap;
    letter-spacing: 0.01em;
    font-family: inherit;
    text-decoration: none;
    line-height: 1.4;
    min-height: 42px;
    background: transparent;
    color: var(--text-primary);
}
.btn:focus-visible {
    outline: 2px solid var(--accent-yellow);
    outline-offset: 3px;
}
.btn-primary {
    background-color: var(--accent-yellow);
    color: #0B0E11;
    box-shadow: 0 2px 8px rgba(252, 213, 53, 0.25);
}
.btn-primary:hover {
    background-color: var(--accent-yellow-hover);
    box-shadow: var(--shadow-yellow);
    transform: translateY(-1px);
    color: #0B0E11;
}
.btn-primary:active {
    transform: scale(0.97);
    box-shadow: 0 1px 4px rgba(252, 213, 53, 0.3);
}
.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}
.btn-outline:hover {
    border-color: var(--accent-yellow);
    color: var(--accent-yellow);
    box-shadow: 0 2px 12px rgba(252, 213, 53, 0.12);
    transform: translateY(-1px);
}
.btn-lg {
    padding: 14px 32px;
    font-size: var(--font-lg);
    border-radius: 10px;
    min-height: 52px;
    font-weight: 700;
}
.btn-xl {
    padding: 16px 40px;
    font-size: var(--font-xl);
    border-radius: 12px;
    min-height: 60px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* ==========================================================================
   五、首页 Hero 区 & 通用 Section
   ========================================================================== */
.hero {
    padding: 80px 24px 90px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(252, 213, 53, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.hero-inner {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.hero-badge {
    display: inline-block;
    background-color: rgba(252, 213, 53, 0.1);
    color: var(--accent-yellow);
    font-size: var(--font-xs);
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 24px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: 1px solid rgba(252, 213, 53, 0.2);
}
.hero h1 {
    font-size: var(--font-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}
.hero h1 .highlight {
    color: var(--accent-yellow);
    position: relative;
}
.hero p {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.hero-actions .btn {
    min-width: 160px;
}
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 56px;
    flex-wrap: wrap;
}
.hero-stat {
    text-align: center;
}
.hero-stat-value {
    font-size: var(--font-3xl);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1;
}
.hero-stat-label {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    margin-top: 6px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

/* 模块区域通用 */
.section {
    padding: 80px 24px;
}
.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-header h2 {
    font-size: var(--font-3xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    color: var(--text-primary);
}
.section-header p {
    font-size: var(--font-md);
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* 卡片网格（首页"核心优势"） */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 28px 24px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}
.card:hover {
    border-color: rgba(252, 213, 53, 0.35);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    background-color: #1a1f27;
}
.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: rgba(252, 213, 53, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    flex-shrink: 0;
}
.card-icon svg {
    width: 26px;
    height: 26px;
}
.card h3 {
    font-size: var(--font-lg);
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}
.card p {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    line-height: 1.65;
}

/* 产品生态网格 */
.ecosystem {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.eco-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}
.eco-item {
    background-color: var(--bg-card);
    border-radius: var(--card-radius);
    padding: 20px 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid transparent;
    transition: all var(--transition-normal);
    cursor: pointer;
}
.eco-item:hover {
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}
.eco-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-yellow);
    flex-shrink: 0;
    box-shadow: 0 0 10px rgba(252, 213, 53, 0.5);
}
.eco-name {
    font-weight: 600;
    font-size: var(--font-sm);
    color: var(--text-primary);
}
.eco-desc {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
}

/* ==========================================================================
   六、列表页 Archive / 分类筛选 / 文章列表
   ========================================================================== */
.page-hero {
    padding: 64px 24px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}
.page-hero::before {
    content: '';
    position: absolute;
    top: -150px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(252, 213, 53, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.page-hero-inner {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.breadcrumb {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}
.breadcrumb a {
    color: var(--text-tertiary);
}
.breadcrumb a:hover {
    color: var(--accent-yellow);
}
.breadcrumb .sep {
    margin: 0 8px;
}
.page-hero h1 {
    font-size: var(--font-4xl);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}
.page-hero h1 .highlight {
    color: var(--accent-yellow);
}
.page-hero p {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* 分类筛选区 */
.filter-section {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 24px;
}
.filter-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.category-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}
.category-tabs a,
.category-tab {
    padding: 8px 18px;
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
    display: inline-block;
    line-height: 1.4;
}
.category-tabs a:hover,
.category-tab:hover {
    color: var(--text-primary);
    border-color: rgba(252, 213, 53, 0.3);
}
.category-tabs a.active,
.category-tabs .current-cat a,
.category-tabs li.current-cat > a {
    background-color: var(--accent-yellow);
    color: #0B0E11;
    border-color: var(--accent-yellow);
    font-weight: 600;
}
.list-info {
    font-size: var(--font-sm);
    color: var(--text-tertiary);
}
.list-info strong {
    color: var(--accent-yellow);
    font-weight: 600;
}

/* 文章列表 */
.list-section {
    padding: 48px 24px;
}
.list-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.article-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.article-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 28px 32px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 28px;
    align-items: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}
.article-item:hover {
    border-color: rgba(252, 213, 53, 0.35);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
    background-color: #1a1f27;
}
.article-date {
    text-align: center;
    padding: 12px 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    flex-shrink: 0;
    min-width: 80px;
}
.article-date .day {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--accent-yellow);
    line-height: 1;
    letter-spacing: -0.02em;
}
.article-date .month {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}
.article-content {
    min-width: 0;
}
.article-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.article-tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-yellow);
    background-color: rgba(252, 213, 53, 0.1);
    padding: 4px 10px;
    border-radius: 12px;
    border: 1px solid rgba(252, 213, 53, 0.2);
    letter-spacing: 0.02em;
    text-decoration: none;
    display: inline-block;
}
.article-title {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
    line-height: 1.3;
}
.article-item:hover .article-title {
    color: var(--accent-yellow);
}
.article-excerpt {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    line-height: 1.65;
}
.article-excerpt p {
    display: inline;
}
.article-meta {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: var(--font-xs);
    color: var(--text-tertiary);
}
.article-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.article-arrow {
    color: var(--text-tertiary);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}
.article-item:hover .article-arrow {
    color: var(--accent-yellow);
    transform: translateX(4px);
}

/* 分页 */
.pagination {
    margin-top: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.pagination ul {
    display: flex;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.pagination li {
    margin: 0;
}

.page-numbers,
.page-btn,
.pagination__btn {
    min-width: 42px;
    height: 42px;
    padding: 0 14px;
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    line-height: 1;
}

.page-numbers:hover:not(.current):not(.disabled),
.page-btn:hover:not(.current):not(.disabled),
.pagination__btn:hover:not(.pagination__btn--active):not(.disabled) {
    color: var(--text-primary);
    border-color: rgba(252, 213, 53, 0.3);
}

.page-numbers.current,
.page-btn.current,
.pagination__btn--active {
    background-color: var(--accent-yellow);
    color: #0B0E11;
    border-color: var(--accent-yellow);
    font-weight: 700;
}

.page-numbers.disabled,
.page-btn.disabled,
.pagination__btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination__btn.next,
.pagination__btn.prev {
    font-size: var(--font-lg);
}

/* 无内容提示 */
.no-posts {
    padding: 60px 24px;
    text-align: center;
}
.no-posts h2 {
    font-size: var(--font-2xl);
    color: var(--text-primary);
    margin-bottom: 16px;
}
.no-posts p {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

/* ==========================================================================
   七、文章详情页 Single Post
   ========================================================================== */
.content-hero {
    padding: 56px 24px 40px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}
.content-hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(252, 213, 53, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.content-hero-inner {
    max-width: var(--content-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.content-hero .article-tags {
    justify-content: center;
}
.article-title {
    font-size: var(--font-3xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}
.content-hero .article-title {
    text-align: center;
}
.article-excerpt {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
    text-align: center;
}
.content-hero .article-meta {
    justify-content: center;
    padding: 20px 0 0 0;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}
.article-author {
    display: flex;
    align-items: center;
    gap: 10px;
}
.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-yellow), var(--accent-yellow-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0E11;
    font-weight: 700;
    font-size: var(--font-sm);
    flex-shrink: 0;
    overflow: hidden;
}
.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}
.author-info .name {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--text-primary);
}
.author-info .date {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    margin-top: 2px;
}
.meta-divider {
    color: var(--border-color);
    font-size: var(--font-sm);
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-xs);
    color: var(--text-tertiary);
}

/* 正文区 */
.content-section {
    padding: 56px 24px;
}
.content-inner {
    max-width: var(--content-width);
    margin: 0 auto;
}
.article-body {
    font-size: var(--font-md);
    line-height: 1.85;
    color: var(--text-primary);
}
.article-body p {
    margin-bottom: 24px;
    color: var(--text-secondary);
}
.article-body > p:first-of-type::first-letter {
    font-size: 3.2em;
    font-weight: 700;
    color: var(--accent-yellow);
    float: left;
    line-height: 1;
    padding: 4px 12px 0 0;
}
.article-body h1,
.article-body h2 {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 48px 0 20px 0;
    letter-spacing: -0.02em;
    line-height: 1.3;
    padding-left: 16px;
    border-left: 4px solid var(--accent-yellow);
}
.article-body h3 {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 36px 0 16px 0;
    letter-spacing: -0.01em;
}
.article-body h4 {
    font-size: var(--font-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin: 28px 0 12px 0;
}
.article-body strong {
    color: var(--text-primary);
    font-weight: 700;
}
.article-body a {
    color: var(--accent-yellow);
    text-decoration: underline;
    text-decoration-color: rgba(252, 213, 53, 0.4);
}
.article-body a:hover {
    text-decoration-color: var(--accent-yellow);
}
.article-body ul,
.article-body ol {
    margin: 20px 0 24px 0;
    padding-left: 28px;
    color: var(--text-secondary);
}
.article-body li {
    margin-bottom: 12px;
    line-height: 1.75;
}
.article-body ul li::marker {
    color: var(--accent-yellow);
}

/* 引用块 */
.article-body blockquote {
    background: linear-gradient(135deg, var(--bg-card) 0%, #1a1f27 100%);
    border-left: 4px solid var(--accent-yellow);
    padding: 24px 28px;
    margin: 32px 0;
    border-radius: 0 var(--card-radius) var(--card-radius) 0;
    color: var(--text-primary);
    font-size: var(--font-md);
    line-height: 1.75;
    font-style: italic;
}
.article-body blockquote::before {
    content: '"';
    display: block;
    font-size: 3em;
    color: var(--accent-yellow);
    line-height: 0.5;
    margin-bottom: 10px;
    font-family: Georgia, serif;
    font-style: normal;
}
.article-body blockquote cite {
    display: block;
    margin-top: 16px;
    font-size: var(--font-sm);
    color: var(--text-tertiary);
    font-style: normal;
}

/* 信息卡片（用于 shortcode / Gutenberg） */
.info-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 28px;
    margin: 32px 0;
}
.info-card-title {
    font-size: var(--font-lg);
    font-weight: 700;
    color: var(--accent-yellow);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.info-card-body {
    color: var(--text-secondary);
    line-height: 1.75;
}
.info-card-body p {
    margin-bottom: 0;
}

/* 数据表格 */
.article-body table,
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 32px 0;
    background-color: var(--bg-card);
    border-radius: var(--card-radius);
    overflow: hidden;
    font-size: var(--font-sm);
}
.article-body table th,
.article-body table td,
.data-table th,
.data-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.article-body table thead,
.data-table thead {
    background-color: rgba(252, 213, 53, 0.08);
}
.article-body table th,
.data-table th {
    font-weight: 700;
    color: var(--accent-yellow);
    font-size: var(--font-sm);
    letter-spacing: 0.02em;
}
.article-body table td,
.data-table td {
    color: var(--text-secondary);
}
.article-body table tr:last-child td,
.data-table tr:last-child td {
    border-bottom: none;
}
.article-body table tr:hover td,
.data-table tr:hover td {
    background-color: rgba(252, 213, 53, 0.03);
}
.value-up {
    color: var(--green-up);
    font-weight: 600;
}
.value-down {
    color: var(--red-down);
    font-weight: 600;
}

/* 代码块 */
.article-body code {
    background-color: var(--bg-primary);
    color: var(--accent-yellow);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: "SF Mono", Menlo, Consolas, "Courier New", monospace;
    font-size: 0.9em;
}
.article-body pre {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 20px;
    margin: 28px 0;
    overflow-x: auto;
    font-size: var(--font-sm);
    line-height: 1.6;
}
.article-body pre code {
    background: none;
    padding: 0;
    color: var(--text-secondary);
}

/* 特色图像 */
.post-thumbnail {
    margin: 0 0 32px 0;
    border-radius: var(--card-radius);
    overflow: hidden;
}
.post-thumbnail img {
    width: 100%;
    height: auto;
    border-radius: var(--card-radius);
}

/* 文章底部：标签、分享 */
.article-footer {
    margin-top: 56px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}
.footer-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}
.footer-tag {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    background-color: var(--bg-card);
    padding: 6px 14px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    text-decoration: none;
}
.footer-tag:hover {
    color: var(--accent-yellow);
    border-color: rgba(252, 213, 53, 0.3);
}
.share-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background-color: var(--bg-card);
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 16px;
}
.share-label {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--text-primary);
}
.share-buttons {
    display: flex;
    gap: 10px;
}
.share-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}
.share-btn:hover {
    color: var(--accent-yellow);
    border-color: var(--accent-yellow);
    transform: translateY(-2px);
}

/* 上/下一篇导航 */
.post-navigation {
    max-width: var(--content-width);
    margin: 48px auto 0;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.nav-previous,
.nav-next {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 20px 24px;
    transition: all var(--transition-normal);
}
.nav-previous:hover,
.nav-next:hover {
    border-color: rgba(252, 213, 53, 0.35);
    transform: translateY(-2px);
}
.nav-next {
    text-align: right;
}
.nav-label {
    display: block;
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.nav-title {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}
.nav-previous:hover .nav-title,
.nav-next:hover .nav-title {
    color: var(--accent-yellow);
}

/* 相关文章区 */
.related-section {
    padding: 56px 24px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}
.related-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.related-section .section-header {
    margin-bottom: 40px;
}
.related-section .section-header h2 {
    font-size: var(--font-2xl);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}
.related-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 24px;
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}
.related-card:hover {
    border-color: rgba(252, 213, 53, 0.35);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.related-tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-yellow);
    background-color: rgba(252, 213, 53, 0.1);
    padding: 4px 10px;
    border-radius: 12px;
    display: inline-block;
    margin-bottom: 14px;
    align-self: flex-start;
}
.related-title {
    font-size: var(--font-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}
.related-card:hover .related-title {
    color: var(--accent-yellow);
}
.related-excerpt {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
    flex: 1;
}
.related-date {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
}

/* ==========================================================================
   八、CTA 区 & 页脚
   ========================================================================== */
.cta-section {
    padding: 70px 24px;
    text-align: center;
}
.cta-inner {
    max-width: 700px;
    margin: 0 auto;
    background: linear-gradient(135deg, #1a1e26 0%, #1E2329 50%, #1a1e26 100%);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 56px 40px;
    position: relative;
    overflow: hidden;
}
.cta-inner::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(252, 213, 53, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.cta-inner h2 {
    font-size: var(--font-2xl);
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
    letter-spacing: -0.02em;
}
.cta-inner p {
    color: var(--text-secondary);
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
    font-size: var(--font-md);
}
.cta-inner .btn {
    position: relative;
    z-index: 1;
}

/* 页脚 */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 24px;
    text-align: center;
}
.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    list-style: none;
}
.footer-links a {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}
.footer-links a:hover {
    color: var(--accent-yellow);
}
.footer-copy {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

/* ==========================================================================
   九、响应式设计 Responsive Design
   ========================================================================== */
@media (max-width: 960px) {
    .site-navigation ul {
        gap: 18px;
    }
    .site-navigation a {
        font-size: 13px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 56px;
        padding: 0 16px;
        gap: 10px;
    }
    .nav-links {
                display: none;
            }
    .site-navigation {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
        z-index: 999;
    }
    .site-navigation.is-open {
        display: block;
    }
    .site-navigation ul {
        flex-direction: column;
        gap: 4px;
        align-items: flex-start;
    }
    .site-navigation li {
        width: 100%;
    }
    .site-navigation a {
        display: block;
        padding: 12px 14px;
        border-radius: 6px;
        font-size: var(--font-md);
        width: 100%;
    }
    .site-navigation a:hover {
        background-color: var(--bg-card);
    }
    .site-navigation .current-menu-item > a::after,
    .site-navigation .current_page_item > a::after,
    .site-navigation a:hover::after {
        display: none;
    }
    .menu-toggle {
        display: inline-flex;
    }
    .logo-text {
        font-size: var(--font-lg);
    }
    .logo-icon {
        width: 30px;
        height: 30px;
    }
    .hero {
        padding: 50px 16px 56px;
    }
    .hero h1 {
        font-size: var(--font-2xl);
    }
    .hero p {
        font-size: var(--font-md);
    }
    .hero-stats {
        gap: 24px;
        margin-top: 36px;
    }
    .hero-stat-value {
        font-size: var(--font-xl);
    }
    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }
    .hero-actions .btn {
        width: 100%;
        min-width: auto;
    }
    .btn-xl {
        padding: 14px 24px;
        font-size: var(--font-lg);
        min-height: 50px;
    }
    .btn-lg {
        padding: 12px 24px;
        font-size: var(--font-md);
        min-height: 44px;
    }
    .section {
        padding: 48px 16px;
    }
    .section-header h2 {
        font-size: var(--font-xl);
    }
    .card-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .eco-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .cta-inner {
        padding: 36px 20px;
        border-radius: 12px;
    }
    .cta-inner h2 {
        font-size: var(--font-xl);
    }
    .header-btns .btn {
        padding: 8px 14px;
        font-size: var(--font-xs);
        min-height: 34px;
        border-radius: 6px;
    }
    .header-btns {
        gap: 8px;
    }
    /* 列表页 */
    .page-hero {
        padding: 40px 16px 32px;
    }
    .page-hero h1 {
        font-size: var(--font-2xl);
    }
    .page-hero p {
        font-size: var(--font-md);
    }
    .filter-section {
        padding: 16px;
    }
    .list-section {
        padding: 32px 16px;
    }
    .article-item {
        grid-template-columns: 1fr;
        padding: 24px 20px;
        gap: 16px;
    }
    .article-date {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 6px 12px;
        min-width: auto;
        width: fit-content;
    }
    .article-date .day {
        font-size: var(--font-lg);
    }
    .article-title {
        font-size: var(--font-lg);
    }
    .article-arrow {
        display: none;
    }
    /* 详情页 */
    .content-hero {
        padding: 40px 16px 32px;
    }
    .article-title {
        font-size: var(--font-2xl);
    }
    .content-section {
        padding: 40px 16px;
    }
    .article-body {
        font-size: var(--font-md);
        line-height: 1.8;
    }
    .article-body h1,
    .article-body h2 {
        font-size: var(--font-xl);
        margin-top: 36px;
    }
    .article-body h3 {
        font-size: var(--font-lg);
    }
    .info-card {
        padding: 20px;
    }
    .article-body table th,
    .article-body table td,
    .data-table th,
    .data-table td {
        padding: 10px 12px;
        font-size: var(--font-xs);
    }
    .share-section {
        flex-direction: column;
        gap: 14px;
        align-items: flex-start;
        padding: 20px;
    }
    .post-navigation {
        grid-template-columns: 1fr;
    }
    .nav-next {
        text-align: left;
    }
    .related-section {
        padding: 40px 16px;
    }
    .section-header h2 {
        font-size: var(--font-xl);
    }
    .page-numbers,
    .page-btn {
        min-width: 38px;
        height: 38px;
        padding: 0 10px;
    }
}

@media (max-width: 400px) {
    .hero h1 {
        font-size: 26px;
    }
    .hero-stats {
        gap: 16px;
    }
    .eco-grid {
        grid-template-columns: 1fr;
    }
    .header-btns .btn {
        padding: 6px 10px;
        font-size: 11px;
        min-height: 30px;
    }
    .logo-text {
        font-size: var(--font-md);
    }
    .logo-icon {
        width: 26px;
        height: 26px;
    }
    .category-tabs a,
    .category-tab {
        padding: 6px 14px;
        font-size: var(--font-xs);
    }
    .article-meta {
        gap: 12px;
    }
}

/* ==========================================================================
   十、打印样式 & 辅助类
   ========================================================================== */
@media print {
    .header,
    .footer,
    .cta-section,
    .hero-actions,
    .share-section,
    .related-section,
    .filter-section {
        display: none;
    }
    body {
        background: #fff;
        color: #000;
        font-size: 13px;
    }
    .article-body p,
    .article-body h1,
    .article-body h2,
    .article-body h3 {
        color: #000;
    }
}

/* WordPress 评论区样式（基础） */
.comments-area {
    max-width: var(--content-width);
    margin: 56px auto 0;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}
.comments-title {
    font-size: var(--font-2xl);
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}
.comment-list {
    list-style: none;
    padding: 0;
}
.comment-list .comment {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 20px 24px;
    margin-bottom: 16px;
}
.comment-author {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.comment-metadata {
    font-size: var(--font-xs);
    color: var(--text-tertiary);
    margin-bottom: 12px;
}
.comment-content p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
    line-height: 1.7;
}
.comment-respond {
    margin-top: 32px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 24px;
}
.comment-reply-title {
    font-size: var(--font-xl);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.comment-form label {
    display: block;
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
    width: 100%;
    padding: 12px 14px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--btn-radius);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--font-sm);
    margin-bottom: 16px;
}
.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--accent-yellow);
    box-shadow: 0 0 0 3px rgba(252, 213, 53, 0.15);
}
.form-allowed-tags {
    display: none;
}