/* ==========================================
   1. 基础重置 + 全局变量（核心）
   ========================================== */
:root {
    /* 主题色 */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #4f46e5;
    --danger-color: #dc2626;
    --success-color: #16a34a;
    --warning-color: #f59e0b;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 布局变量 */
    --container-width: 1200px;
    --gutter: 20px;
    --header-height: 80px;
    
    /* 字体变量 */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* 过渡动画 */
    --transition-base: all 0.3s ease;
    --transition-fast: all 0.2s ease;
}

/* 全局重置 */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    line-height: 1.5;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    color: var(--gray-800);
    background-color: var(--gray-50);
    line-height: 1.6;
}

/* ==========================================
   2. 通用基础样式（核心修复：容器宽度强制生效）
   ========================================== */
/* 无障碍样式 - 跳转到内容链接 */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    z-index: 1000;
    text-decoration: none;
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* 通用容器（强制宽度，解决下载页面卡片挤边问题） */
.container {
    width: 100% !important;
    max-width: 1200px !important; /* 强制最大宽度，优先级最高 */
    margin: 0 auto !important;     /* 强制居中 */
    padding: 0 var(--gutter);
    min-width: 320px;
}

/* 通用链接样式 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 通用按钮样式 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    min-height: 48px;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: white;
    text-decoration: none;
}

.btn-primary:focus {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    min-height: 48px;
}

.btn-secondary:hover {
    background-color: var(--gray-100);
    color: var(--primary-dark);
    text-decoration: none;
}

/* 通用标题样式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

h1 {
    font-size: var(--font-size-2xl);
}

h2 {
    font-size: var(--font-size-xl);
}

h3 {
    font-size: var(--font-size-lg);
}

/* 通用列表样式 */
ul, ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

/* SEO关键词样式 */
.seo-keyword {
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
}

/* ==========================================
   3. 头部导航样式
   ========================================== */
.site-header {
    background-color: white;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 999;
    height: var(--header-height);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo img {
    max-height: 40px;
    width: auto;
}

/* 主导航样式 */
.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    gap: 2rem;
}

.main-nav li {
    margin: 0;
}

.main-nav a {
    color: var(--gray-700);
    font-weight: var(--font-weight-medium);
    padding: 0.5rem 0;
    position: relative;
    text-decoration: none;
}

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

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

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

/* 移动端菜单触发器（默认隐藏） */
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--gray-800);
    position: relative;
}

.menu-icon::before,
.menu-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--gray-800);
    left: 0;
}

.menu-icon::before {
    top: -8px;
}

.menu-icon::after {
    bottom: -8px;
}

/* ==========================================
   4. 主要内容区基础样式
   ========================================== */
.main-content {
    padding: 3rem 0;
    min-height: calc(100vh - var(--header-height) - 300px);
}

/* ==========================================
   5. 主页核心板块样式
   ========================================== */
/* 板块通用样式 */
.section-title {
    text-align: center;
    margin-bottom: 2rem;
}
.section-title h2 {
    font-size: 2rem;
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
}
.section-title .section-desc {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-top: 1rem;
}
.home-more-link {
    text-align: center;
    margin-top: 2rem;
}
.home-more-link a {
    display: inline-block;
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-lg);
    text-decoration: none;
}
.home-more-link a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}
.home-more-link a i {
    margin-left: 0.5rem;
}

/* 英雄区样式 */
.hero-section {
    text-align: center;
    padding: 4rem 0;
    background-color: var(--gray-100);
    border-radius: 8px;
    margin-bottom: 3rem;
}

.hero-section h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: var(--font-size-lg);
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--gray-700);
}

.version-info {
    margin-top: 2rem;
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

/* 1. 主页官方下载板块 */
.home-download-section {
    background-color: white;
    padding: 3rem 0;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    margin-bottom: 3rem;
}
.home-download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}
.home-download-card {
    padding: 2rem;
    border-radius: 8px;
    color: white;
    text-align: center;
}
.home-download-card h3 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}
.home-download-card p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}
.home-download-card.android-card {
    background-color: #34a853;
}
.home-download-card.ios-card {
    background-color: #5ac8fa;
}
.home-download-card.pc-card {
    background-color: #5856d6;
}

/* 2. 主页多链教程板块 */
.home-tutorial-section {
    margin-bottom: 3rem;
}
.home-tutorial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.home-tutorial-item {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    transition: var(--transition-base);
}
.home-tutorial-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.home-tutorial-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}
.home-tutorial-item p {
    color: var(--gray-700);
    margin-bottom: 1.5rem;
}
.home-tutorial-item a {
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
}
.home-tutorial-item a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* 3. 主页质押资讯板块 */
.home-stake-section {
    background-color: var(--gray-50);
    padding: 3rem 0;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    margin-bottom: 3rem;
}
.home-stake-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.home-stake-item {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.stake-item-meta {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    margin-bottom: 0.5rem;
}
.home-stake-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
}
.home-stake-item h3 a {
    color: var(--gray-900);
    text-decoration: none;
}
.home-stake-item h3 a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}
.home-stake-item p {
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    line-height: 1.5;
}

/* 4. 主页DEX功能板块 */
.home-dex-section {
    margin-bottom: 3rem;
}
.home-dex-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.home-dex-item {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    text-align: center;
    transition: var(--transition-base);
}
.home-dex-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.dex-icon {
    width: 60px;
    height: 60px;
    line-height: 60px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: white;
    font-weight: var(--font-weight-bold);
    margin: 0 auto 1.5rem;
    font-size: 0.9rem;
}
.home-dex-item:nth-child(2) .dex-icon {
    background-color: var(--secondary-color);
}
.home-dex-item:nth-child(3) .dex-icon {
    background-color: var(--warning-color);
}
.home-dex-item h3 {
    margin-bottom: 1rem;
}
.home-dex-item p {
    color: var(--gray-700);
    font-size: var(--font-size-sm);
}

/* 5. 主页最新新闻板块 */
.home-news-section {
    background-color: white;
    padding: 3rem 0;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    margin-bottom: 3rem;
}
.home-news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.home-news-item {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    transition: var(--transition-base);
}
.home-news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.news-item-img {
    height: 180px;
    overflow: hidden;
}
.news-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}
.home-news-item:hover .news-item-img img {
    transform: scale(1.05);
}
.news-item-content {
    padding: 1.5rem;
}
.news-item-meta {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    margin-bottom: 0.8rem;
}
.home-news-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
}
.home-news-item h3 a {
    color: var(--gray-900);
    text-decoration: none;
}
.home-news-item h3 a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}
.home-news-item p {
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    line-height: 1.5;
}

/* 功能区样式（修复网格布局） */
.features-section {
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.feature-item {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    transition: var(--transition-base);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feature-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 用户评价样式 */
.testimonials-section {
    margin-bottom: 3rem;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.testimonial-item {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 1rem;
    color: var(--gray-700);
}

.testimonial-author {
    font-weight: var(--font-weight-medium);
    color: var(--gray-800);
}

/* ==========================================
   6. 教程页面样式（核心修复：双栏布局）
   ========================================== */
.tutorial-header {
    margin-bottom: 3rem;
    text-align: center;
}

.tutorial-desc {
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--gray-700);
}

/* 修复双栏布局 - 强制生效，解决核心问题 */
.tutorial-content {
    display: grid;
    /* 强制侧边栏最小280px，主内容自适应，优先级最高 */
    grid-template-columns: minmax(280px, 1fr) 3fr !important;
    gap: 2rem;
    width: 100% !important;
    /* 防止布局塌陷 */
    overflow: hidden;
}

/* 修复侧边栏定位和宽度 */
.sidebar-menu {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: calc(var(--header-height) + 2rem);
    height: fit-content;
    /* 强制侧边栏宽度，防止被压缩 */
    min-width: 280px !important;
    max-width: 300px !important;
}

.sidebar-menu h3 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.sidebar-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar-menu a {
    display: block;
    padding: 0.5rem 0;
    color: var(--gray-700);
    text-decoration: none;
}

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

.sidebar-tips {
    background-color: var(--gray-100);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 2rem;
}

.sidebar-tips h3 {
    margin-bottom: 1rem;
    font-size: var(--font-size-base);
}

.sidebar-btn {
    display: block;
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 0.75rem;
    border-radius: 6px;
    margin-top: 1rem;
    text-decoration: none;
    font-weight: var(--font-weight-medium);
}

.sidebar-btn:hover {
    background-color: var(--primary-dark);
    color: white;
    text-decoration: none;
}

.tutorial-step {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 2rem;
}

.tutorial-step h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.warning-note {
    background-color: rgba(220, 38, 38, 0.1);
    border-left: 4px solid var(--danger-color);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0 6px 6px 0;
}

.tips-note {
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning-color);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0 6px 6px 0;
}

.tutorial-img {
    margin: 1.5rem 0;
    text-align: center;
}

.tutorial-img img {
    max-width: 100%;
    border-radius: 6px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

/* ==========================================
   7. 下载页面样式（核心修复：卡片排列）
   ========================================== */
.download-header {
    margin-bottom: 3rem;
    text-align: center;
}

.download-desc {
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--gray-700);
}

.version-card {
    background-color: var(--gray-100);
    padding: 1.5rem;
    border-radius: 8px;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.version-badge {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: var(--font-size-sm);
    margin-bottom: 1rem;
}

/* 核心修复：下载卡片排列 - 强制三列+居中+占满宽度 */
.download-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr) !important; /* 强制三列 */
    gap: 2rem;
    margin-bottom: 3rem;
    width: 100% !important; /* 强制占满父容器 */
    max-width: 1200px !important; /* 最大宽度匹配容器 */
    margin-left: auto !important; /* 强制居中 */
    margin-right: auto !important;
}

.download-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: var(--transition-base);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.android-card .card-header {
    background-color: #34a853;
}

.ios-card .card-header {
    background-color: #5ac8fa;
}

.pc-card .card-header {
    background-color: #5856d6;
}

.os-badge {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: var(--font-size-sm);
}

.card-body {
    padding: 1.5rem;
}

.version-info-list {
    list-style: none;
    margin: 0 0 1.5rem;
    padding: 0;
}

.version-info-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.btn-download {
    display: block;
    width: 100%;
    text-align: center;
    margin-bottom: 1rem;
}

.btn-download.secondary {
    margin-bottom: 0.5rem;
}

.size {
    font-size: var(--font-size-sm);
    opacity: 0.8;
    margin-left: 0.5rem;
}

.download-tips {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: var(--gray-100);
    border-radius: 6px;
    font-size: var(--font-size-sm);
}

.download-tips h4 {
    margin-bottom: 0.5rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

/* 下载验证样式 */
.download-verification {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 3rem;
}

.verification-steps ol {
    counter-reset: step-counter;
    list-style: none;
    margin: 0;
    padding: 0;
}

.verification-steps li {
    counter-increment: step-counter;
    margin-bottom: 2rem;
    position: relative;
    padding-left: 3rem;
}

.verification-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 2rem;
    height: 2rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
}

.warning-box {
    background-color: rgba(220, 38, 38, 0.1);
    border-left: 4px solid var(--danger-color);
    padding: 1rem;
    margin-top: 2rem;
    border-radius: 0 6px 6px 0;
}

.warning-box h3 {
    color: var(--danger-color);
    margin-bottom: 0.5rem;
    font-size: var(--font-size-base);
}

/* FAQ样式 */
.download-faq, .tutorial-faq, .dex-faq {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.faq-list {
    margin-top: 2rem;
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-item:first-child {
    border-top: 1px solid var(--gray-200);
}

.faq-question {
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    padding: 1rem 0;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.faq-question[aria-expanded="true"]::after {
    content: '-';
}

.faq-answer {
    padding: 0 0 1rem;
    color: var(--gray-700);
}

/* ==========================================
   8. 资讯页面样式
   ========================================== */
.news-header {
    margin-bottom: 3rem;
    text-align: center;
}

.news-desc {
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--gray-700);
}

.news-content {
    display: grid;
    grid-template-columns: minmax(280px, 1fr) 3fr !important;
    gap: 2rem;
    width: 100% !important;
}

.sidebar-search {
    display: flex;
    margin-bottom: 2rem;
}

.sidebar-search input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px 0 0 6px;
    font-size: var(--font-size-base);
}

.sidebar-search button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0 1rem;
    border-radius: 0 6px 6px 0;
    cursor: pointer;
}

.sidebar-categories {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 2rem;
}

.sidebar-categories h3 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.sidebar-categories ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar-categories a {
    display: block;
    padding: 0.5rem 0;
    color: var(--gray-700);
    text-decoration: none;
}

.sidebar-categories a.active {
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
}

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

.sidebar-download {
    background-color: var(--gray-100);
    padding: 1.5rem;
    border-radius: 8px;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.news-item {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    display: grid;
    grid-template-columns: 250px 1fr;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-content-inner {
    padding: 1.5rem;
}

.news-content h2 {
    margin-bottom: 0.5rem;
    font-size: var(--font-size-lg);
}

.news-content h2 a {
    color: var(--gray-900);
    text-decoration: none;
}

.news-content h2 a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.news-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.category {
    background-color: var(--gray-100);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: var(--font-size-sm);
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
}

.read-more:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.pagination {
    margin-top: 3rem;
    text-align: center;
}

.pagination ul {
    display: inline-flex;
    list-style: none;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.pagination a {
    display: block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    color: var(--gray-700);
    text-decoration: none;
}

.pagination a:hover {
    background-color: var(--gray-100);
    color: var(--primary-color);
}

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

/* ==========================================
   9. DEX功能页面样式
   ========================================== */
.dex-header {
    margin-bottom: 3rem;
    text-align: center;
}

.dex-desc {
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--gray-700);
}

.dex-features {
    margin-bottom: 3rem;
}

.dex-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.dex-feature-item {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.feature-icon {
    margin-bottom: 1.5rem;
}

.feature-icon img {
    max-height: 64px;
}

.feature-points {
    list-style: none;
    margin: 1rem 0 0;
    padding: 0;
}

.dex-tutorial {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 3rem;
}

.tutorial-steps {
    margin-top: 2rem;
}

.tutorial-step-item {
    margin-bottom: 2rem;
}

.tutorial-step-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* ==========================================
   10. 页脚样式
   ========================================== */
.site-footer {
    background-color: var(--gray-900);
    color: var(--gray-300);
    padding: 4rem 0 2rem;
    margin-top: 3rem;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-brand img {
    max-height: 33px;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

.site-footer h3 {
    color: white;
    font-size: var(--font-size-base);
    margin-bottom: 1.5rem;
}

.site-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer li {
    margin-bottom: 0.75rem;
}

.site-footer a {
    color: var(--gray-400);
    text-decoration: none;
}

.site-footer a:hover {
    color: white;
    text-decoration: none;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.copyright {
    margin-bottom: 0.5rem;
}

.disclaimer {
    margin-bottom: 0.5rem;
}

.seo-footer {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

/* ==========================================
   11. 辅助工具类
   ========================================== */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0 !important;
}

.mt-1 {
    margin-top: 0.5rem !important;
}

.mt-2 {
    margin-top: 1rem !important;
}

.mb-1 {
    margin-bottom: 0.5rem !important;
}

.mb-2 {
    margin-bottom: 1rem !important;
}

/* ==========================================
   12. 响应式样式（修复断点错误）
   ========================================== */
/* 平板设备 (最大宽度 1024px) */
@media (max-width: 1024px) {
    :root {
        --container-width: 900px;
    }
    
    .features-grid,
    .dex-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .download-options {
        grid-template-columns: repeat(2, 1fr) !important; /* 平板显示两列 */
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .news-item {
        grid-template-columns: 200px 1fr;
    }

    /* 教程/资讯页面平板端仍保持双栏 */
    .tutorial-content, .news-content {
        grid-template-columns: minmax(250px, 1fr) 3fr !important;
    }
}

/* 手机设备 (最大宽度 768px) */
@media (max-width: 768px) {
    /* 移动端显示菜单按钮 */
    .menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: white;
        padding: 1rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        z-index: 998;
    }
    
    .main-nav.active {
        transform: translateY(0);
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    /* 下载页面手机端显示单列 */
    .download-options {
        grid-template-columns: 1fr !important;
    }
    
    .features-grid,
    .dex-features-grid,
    .home-download-grid,
    .home-tutorial-grid,
    .home-stake-grid,
    .home-dex-grid,
    .home-news-grid {
        grid-template-columns: 1fr !important;
    }
    
    .footer-top {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-item {
        grid-template-columns: 1fr;
    }

    /* 教程/资讯页面手机端切换为单列 */
    .tutorial-content, .news-content {
        grid-template-columns: 1fr !important;
    }

    .sidebar-menu {
        position: static !important;
        max-width: 100% !important;
        min-width: 100% !important;
        margin-bottom: 2rem;
    }
}