/*
Theme Name: bian_mb2
Theme URI: https://www.binance.com
Author: Binance
Author URI: https://www.binance.com
Description: Binance 币安 - 全球领先的加密货币交易平台主题，适合加密货币、区块链行业资讯网站
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Tags: 加密货币, 区块链, 比特币, 以太坊, 深色主题, 响应式, 资讯, 财经
Text Domain: bian_mb2
*/

/* ============================================
   Binance Landing Page - Style Sheet
   ============================================ */

/* CSS Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #0b0e11;
    --color-bg-secondary: #181a20;
    --color-bg-card: #2b3139;
    --color-bg-card-hover: #343a44;
    --color-primary: #f0b90b;
    --color-primary-hover: #d4a30a;
    --color-text: #eaecef;
    --color-text-secondary: #848e9c;
    --color-text-muted: #5e6673;
    --color-border: #2b3139;
    --color-green: #0ecb81;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: 0 24px;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0;
}

.logo img {
    height: 28px;
    width: auto;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-link:hover {
    color: var(--color-text);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 20px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #181a20;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-text-secondary);
}

.btn-outline:hover {
    border-color: var(--color-text);
}

.btn-large {
    padding: 14px 40px;
    font-size: 16px;
    border-radius: 4px;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 80px 0 60px;
    text-align: center;
}

.section-label {
    display: inline-block;
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--color-text);
}

.hero-desc {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: 60px 0 80px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    background-color: var(--color-bg-card);
    border-radius: 12px;
    padding: 32px 24px;
    transition: var(--transition);
}

.feature-card:hover {
    background-color: var(--color-bg-card-hover);
    transform: translateY(-4px);
}

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.feature-card:nth-child(1) .feature-icon {
    background-color: rgba(240, 185, 11, 0.15);
}

.feature-card:nth-child(2) .feature-icon {
    background-color: rgba(14, 203, 129, 0.15);
}

.feature-card:nth-child(3) .feature-icon {
    background-color: rgba(56, 119, 255, 0.15);
}

.feature-card:nth-child(4) .feature-icon {
    background-color: rgba(168, 85, 247, 0.15);
}

.feature-card:nth-child(3) .feature-icon svg {
    color: #3877ff;
}

.feature-card:nth-child(4) .feature-icon svg {
    color: #a855f7;
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.feature-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   Data Section
   ============================================ */
.data-section {
    padding: 80px 0;
    text-align: center;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.data-card {
    background-color: var(--color-bg-card);
    border-radius: 12px;
    padding: 32px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.data-card:hover {
    background-color: var(--color-bg-card-hover);
}

.data-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.data-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    padding: 60px 0 80px;
}

.cta-box {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, #1e2329 100%);
    border-radius: 16px;
    padding: 60px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
    position: relative;
}

.cta-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    position: relative;
}

.cta-box .btn {
    position: relative;
}

/* ============================================
   FAQ Section
   ============================================ */
.faq-section {
    padding: 80px 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background-color: var(--color-bg-card);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    background-color: var(--color-bg-card-hover);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    list-style: none;
    transition: var(--transition);
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    margin-left: auto;
    font-size: 24px;
    font-weight: 300;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.faq-item[open] .faq-question::after {
    content: '−';
}

.faq-q-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background-color: rgba(240, 185, 11, 0.15);
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-answer {
    padding: 0 24px 20px 68px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
    text-align: center;
}

.footer-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.footer-desc a {
    color: var(--color-primary);
}

.footer-desc a:hover {
    text-decoration: underline;
}

.footer-copyright {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ============================================
   Breadcrumb
   ============================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 0;
    font-size: 14px;
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-secondary);
}

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

.breadcrumb-sep {
    color: var(--color-text-muted);
}

.breadcrumb-current {
    color: var(--color-text);
}

/* ============================================
   Page Header (List Page)
   ============================================ */
.page-header {
    padding: 40px 0 32px;
    text-align: center;
}

.page-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.page-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Category Filter
   ============================================ */
.category-filter {
    padding: 0 0 32px;
}

.category-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.category-link {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-card);
    transition: var(--transition);
}

.category-link:hover,
.category-link.active {
    color: var(--color-bg);
    background-color: var(--color-primary);
}

/* ============================================
   Article List
   ============================================ */
.article-list-section {
    padding: 0 0 80px;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.article-card {
    background-color: var(--color-bg-card);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.article-card:hover {
    background-color: var(--color-bg-card-hover);
    transform: translateY(-4px);
}

.article-card-link {
    display: block;
    color: inherit;
}

.article-card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
}

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

.article-card:hover .article-card-image img {
    transform: scale(1.05);
}

.article-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
}

.tag-hot {
    background-color: #e74c3c;
}

.tag-new {
    background-color: var(--color-green);
}

.article-card-body {
    padding: 20px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    font-size: 13px;
}

.article-category {
    color: var(--color-primary);
    font-weight: 600;
}

.article-date {
    color: var(--color-text-muted);
}

.article-card-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 10px;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-excerpt {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-footer {
    margin-top: 12px;
}

.article-read-more {
    font-size: 14px;
    color: var(--color-primary);
    font-weight: 500;
}

/* Featured Article (spans full width) */
.article-card-featured {
    grid-column: span 2;
}

.article-card-featured .article-card-image {
    aspect-ratio: 21 / 9;
}

.article-card-featured .article-card-title {
    font-size: 24px;
    -webkit-line-clamp: 2;
}

.article-card-featured .article-card-excerpt {
    -webkit-line-clamp: 3;
}

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

.pagination ul.page-numbers {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.pagination__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-card);
    text-decoration: none;
    transition: var(--transition);
}

.pagination__btn:hover {
    color: var(--color-text);
    background-color: var(--color-bg-card-hover);
}

.pagination__btn--active {
    color: var(--color-bg);
    background-color: var(--color-primary);
    pointer-events: none;
}

.pagination__btn--prev svg,
.pagination__btn--next svg {
    margin: 0 4px;
}

.pagination__dots {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    color: var(--color-text-muted);
    font-size: 14px;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-card);
    transition: var(--transition);
}

.pagination-link:hover {
    color: var(--color-text);
    background-color: var(--color-bg-card-hover);
}

.pagination-link.active {
    color: var(--color-bg);
    background-color: var(--color-primary);
}

.pagination-ellipsis {
    color: var(--color-text-muted);
    padding: 0 4px;
}

.pagination-prev svg,
.pagination-next svg {
    margin: 0 4px;
}

/* ============================================
   Article Content Page
   ============================================ */
.article-content {
    padding: 24px 0 80px;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}

/* Article Header */
.article-header {
    margin-bottom: 32px;
}

.article-header-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 14px;
}

.article-category-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 4px;
    background-color: rgba(240, 185, 11, 0.15);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
}

.article-time {
    color: var(--color-text-secondary);
}

.article-views {
    color: var(--color-text-muted);
}

.article-title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
    color: var(--color-text);
}

.article-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Article Cover Image */
.article-cover {
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 40px;
}

.article-cover img {
    width: 100%;
    height: auto;
    display: block;
}

/* Article Body */
.article-body {
    font-size: 16px;
    line-height: 1.9;
    color: var(--color-text-secondary);
}

.article-body p {
    margin-bottom: 20px;
}

.article-body h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-text);
    margin: 40px 0 16px;
    padding-top: 8px;
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
    margin: 32px 0 12px;
}

.article-body ul,
.article-body ol {
    margin: 16px 0 20px 24px;
}

.article-body li {
    margin-bottom: 8px;
    line-height: 1.8;
}

.article-body strong {
    color: var(--color-text);
    font-weight: 600;
}

.article-body blockquote {
    border-left: 4px solid var(--color-primary);
    background-color: var(--color-bg-card);
    padding: 20px 24px;
    margin: 24px 0;
    border-radius: 0 8px 8px 0;
}

.article-body blockquote p {
    margin-bottom: 0;
    font-style: italic;
    color: var(--color-text);
}

/* Article Tags */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.article-tags-label {
    font-size: 14px;
    color: var(--color-text-muted);
    font-weight: 500;
}

.article-tag-link {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-card);
    transition: var(--transition);
}

.article-tag-link:hover {
    color: var(--color-primary);
    background-color: rgba(240, 185, 11, 0.1);
}

/* Article Share */
.article-share {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.article-share-label {
    font-size: 14px;
    color: var(--color-text-muted);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-bg-card);
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.share-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-bg);
}

.share-btn.copied {
    background-color: var(--color-green);
    color: #fff;
}

/* ============================================
   Post Navigation (Prev/Next)
   ============================================ */
.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.nav-previous,
.nav-next {
    background-color: var(--color-bg-card);
    border-radius: 12px;
    padding: 20px;
    transition: var(--transition);
}

.nav-previous:hover,
.nav-next:hover {
    background-color: var(--color-bg-card-hover);
}

.nav-previous a,
.nav-next a {
    display: block;
    color: inherit;
}

.nav-previous {
    text-align: left;
}

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

.nav-empty {
    background-color: transparent;
    visibility: hidden;
}

.nav-label {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 8px;
}

.nav-title {
    display: block;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   Sidebar
   ============================================ */
.article-sidebar {
    position: sticky;
    top: 88px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background-color: var(--color-bg-card);
    border-radius: 12px;
    padding: 24px;
}

.sidebar-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

/* Author Card */
.author-card {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: rgba(240, 185, 11, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.author-role {
    font-size: 13px;
    color: var(--color-text-muted);
}

.author-bio {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Related Articles */
.related-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.related-item {
    display: flex;
    gap: 12px;
    color: inherit;
}

.related-item:hover .related-title {
    color: var(--color-primary);
}

.related-item img {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
}

.related-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    min-width: 0;
}

.related-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.related-date {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* Sidebar CTA */
.sidebar-cta {
    text-align: center;
    background: linear-gradient(135deg, var(--color-bg-card) 0%, #1e2329 100%);
}

.sidebar-cta-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
    padding-bottom: 0;
    border-bottom: none;
}

.sidebar-cta-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ============================================
   Active Nav Link
   ============================================ */
.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 1px;
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .data-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .hero-title {
        font-size: 40px;
    }

    .section-title {
        font-size: 32px;
    }

    /* List page */
    .article-grid {
        grid-template-columns: 1fr;
    }

    .article-card-featured {
        grid-column: span 1;
    }

    .article-card-featured .article-card-image {
        aspect-ratio: 16 / 9;
    }

    .article-card-featured .article-card-title {
        font-size: 18px;
    }

    /* Content page */
    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sidebar-card {
        flex: 1;
        min-width: 280px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--color-bg-secondary);
        border-bottom: 1px solid var(--color-border);
        padding: 16px 24px;
    }

    .nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        gap: 16px;
    }

    .menu-toggle {
        display: flex;
    }

    .header-actions .btn-outline {
        display: none;
    }

    .hero {
        padding: 60px 0 40px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .data-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .data-card:last-child {
        grid-column: span 2;
    }

    .data-value {
        font-size: 28px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-desc {
        font-size: 14px;
    }

    .cta-box {
        padding: 40px 24px;
    }

    .cta-title {
        font-size: 24px;
    }

    .faq-answer {
        padding-left: 24px;
    }

    .btn-large {
        padding: 12px 32px;
        font-size: 14px;
    }

    /* List page mobile */
    .page-title {
        font-size: 28px;
    }

    .page-desc {
        font-size: 14px;
    }

    .category-list {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
    }

    .category-list::-webkit-scrollbar {
        display: none;
    }

    .category-link {
        white-space: nowrap;
        flex-shrink: 0;
    }

    .article-card-title {
        font-size: 16px;
    }

    .pagination-link {
        min-width: 36px;
        height: 36px;
        font-size: 13px;
    }

    /* Content page mobile */
    .article-title {
        font-size: 24px;
    }

    .article-subtitle {
        font-size: 16px;
    }

    .article-body {
        font-size: 15px;
    }

    .article-body h2 {
        font-size: 20px;
    }

    .article-sidebar {
        flex-direction: column;
    }

    .sidebar-card {
        min-width: 100%;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

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

    .data-grid {
        grid-template-columns: 1fr;
    }

    .data-card:last-child {
        grid-column: span 1;
    }

    .section-title {
        font-size: 24px;
    }

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

    /* Content page small mobile */
    .article-title {
        font-size: 22px;
    }

    .article-header-meta {
        flex-wrap: wrap;
        gap: 8px;
    }

    .article-share {
        flex-wrap: wrap;
    }
}

/* ============================================
   Accessibility
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
details:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .cta-section,
    .menu-toggle {
        display: none;
    }

    body {
        background: #fff;
        color: #000;
    }

    .feature-card,
    .data-card,
    .faq-item {
        border: 1px solid #ccc;
        background: #fff;
    }
}