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

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    padding: 60px 0 40px;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.logo i {
    font-size: 48px;
    color: #ffd700;
    animation: pulse 2s infinite;
}

.logo h1 {
    font-size: 3rem;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-top: 10px;
}

/* 主要内容区域 */
.main-content {
    background: white;
    border-radius: 20px;
    padding: 50px 40px;
    margin-bottom: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* 介绍区域 */
.intro-section {
    text-align: center;
    margin-bottom: 60px;
}

.intro-section h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 20px;
    position: relative;
}

.intro-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 2px;
}

.description {
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
    max-width: 900px;
    margin: 0 auto;
}

/* 功能特点区域 */
.features-section {
    margin-bottom: 60px;
}

.features-section h3 {
    font-size: 2.2rem;
    text-align: center;
    color: #2c3e50;
    margin-bottom: 40px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8f4f8 100%);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    border-color: #667eea;
}

.feature-icon {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 20px;
}

.feature-card h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 彩票类型区域 */
.lottery-types {
    margin-bottom: 60px;
}

.lottery-types h3 {
    font-size: 2.2rem;
    text-align: center;
    color: #2c3e50;
    margin-bottom: 40px;
}

.lottery-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.lottery-item {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 15px 25px;
    border-radius: 25px;
    font-weight: bold;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.lottery-item:hover {
    transform: scale(1.05);
}

/* 快速导航区域 */
.quick-nav {
    margin: 50px 0;
}

.quick-nav h3 {
    text-align: center;
    font-size: 2.2rem;
    color: #2c3e50;
    margin-bottom: 40px;
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.nav-item {
    background: white;
    border-radius: 15px;
    padding: 30px 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    text-align: center;
}

.nav-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
    border-color: #667eea;
}

.nav-item i {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 15px;
    display: block;
}

.nav-item h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin: 0 0 10px 0;
    font-weight: bold;
}

.nav-item p {
    color: #666;
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 最新文章区域 */
.articles-section {
    margin-bottom: 60px;
}

.articles-section h3 {
    font-size: 2.2rem;
    text-align: center;
    color: #2c3e50;
    margin-bottom: 40px;
}

.articles-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.article-item {
    background: #ffffff;
    border: 1px solid #e8e8e8;
    border-radius: 12px;
    padding: 25px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.article-item:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transform: translateY(-3px);
    border-color: #667eea;
}

.article-content h4 {
    margin-bottom: 15px;
    line-height: 1.4;
}

.article-content h4 a {
    color: #2c3e50;
    text-decoration: none;
    font-size: 1.15rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.article-content h4 a:hover {
    color: #667eea;
}

.article-excerpt {
    color: #666;
    line-height: 1.6;
    font-size: 0.95rem;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #888;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
}

.article-date {
    color: #999;
}

.article-category {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.more-articles-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(45deg, #f8f9ff, #e8f4f8);
    color: #667eea;
    padding: 15px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    border: 2px solid #667eea;
    transition: all 0.3s ease;
}

.more-articles-btn:hover {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.more-articles-btn i {
    transition: transform 0.3s ease;
}

.more-articles-btn:hover i {
    transform: translateX(5px);
}

/* 下载区域 */
.download-section {
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 50px;
    border-radius: 20px;
    color: white;
}

.download-section h3 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.download-section > p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.download-btn {
    display: inline-block;
    background: linear-gradient(45deg, #ffd700, #ffed4a);
    color: #333;
    padding: 20px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    margin-bottom: 30px;
}

.download-btn:hover {
    background: linear-gradient(45deg, #ffed4a, #ffd700);
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.download-btn i {
    margin-right: 10px;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}

.download-info p {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
}

.download-info i {
    color: #ffd700;
}

/* 底部 */
.footer {
    text-align: center;
    padding: 30px 0;
    color: white;
    opacity: 0.8;
}

/* 动画效果 */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card {
    animation: fadeInUp 0.8s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

/* 移动适配优化 */
/* 中等屏幕 (平板) */
@media (max-width: 1024px) {
    .container {
        padding: 0 25px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .main-content {
        padding: 40px 30px;
    }
}

/* 小屏幕 (手机横屏/小平板) */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header {
        padding: 40px 0 30px;
    }
    
    .logo {
        flex-direction: column;
        gap: 10px;
    }
    
    .logo h1 {
        font-size: 2.2rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .intro-section h2 {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    .description {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .features-section h3,
    .lottery-types h3,
    .articles-section h3,
    .download-section h3 {
        font-size: 1.8rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px 20px;
    }
    
    .feature-icon {
        font-size: 2.5rem;
    }
    
    .main-content {
        padding: 30px 20px;
        margin-bottom: 30px;
    }
    
    .download-section {
        padding: 40px 20px;
    }
    
    .download-section h3 {
        font-size: 2rem;
    }
    
    .download-btn {
        padding: 18px 35px;
        font-size: 1.2rem;
        margin-bottom: 25px;
    }
    
    .download-info {
        flex-direction: column;
        gap: 15px;
    }
    
    .lottery-list {
        justify-content: center;
        gap: 15px;
    }
    
    .lottery-item {
        padding: 12px 20px;
        font-size: 0.9rem;
        margin: 5px;
    }
    
    /* 文章板块移动端适配 */
    .articles-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .article-item {
        padding: 20px;
    }
    
    .article-content h4 a {
        font-size: 1.1rem;
    }
    
    .article-excerpt {
        font-size: 0.9rem;
        -webkit-line-clamp: 2;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    /* 移动端触摸优化 */
    .feature-card:hover {
        transform: translateY(-5px);
    }
    
    .lottery-item:focus,
    .lottery-item:active {
        outline: 2px solid #667eea;
        outline-offset: 2px;
    }
}

/* 超小屏幕 (手机竖屏) */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .header {
        padding: 30px 0 20px;
    }
    
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .logo i {
        font-size: 36px;
    }
    
    .tagline {
        font-size: 0.9rem;
    }
    
    .intro-section h2 {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    .description {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .features-section h3,
    .lottery-types h3,
    .articles-section h3 {
        font-size: 1.5rem;
    }
    
    .feature-card {
        padding: 20px 15px;
    }
    
    .feature-card h4 {
        font-size: 1.1rem;
    }
    
    .feature-card p {
        font-size: 0.9rem;
    }
    
    .main-content {
        padding: 25px 15px;
        border-radius: 15px;
    }
    
    .download-section {
        padding: 30px 15px;
        border-radius: 15px;
    }
    
    .download-section h3 {
        font-size: 1.7rem;
        line-height: 1.2;
    }
    
    .download-btn {
        padding: 15px 30px;
        font-size: 1.1rem;
        border-radius: 40px;
    }
    
    .download-info p {
        font-size: 0.9rem;
    }
    
    .lottery-item {
        padding: 10px 15px;
        font-size: 0.85rem;
        border-radius: 20px;
    }
    
    /* 小屏幕文章板块优化 */
    .article-item {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    .article-content h4 a {
        font-size: 1rem;
        line-height: 1.3;
    }
    
    .article-excerpt {
        font-size: 0.85rem;
    }
    
    .more-articles-btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
    
    .footer p {
        font-size: 0.85rem;
        line-height: 1.4;
    }
}

/* 超小屏幕优化 */
@media (max-width: 320px) {
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .intro-section h2 {
        font-size: 1.3rem;
    }
    
    .features-section h3,
    .lottery-types h3,
    .articles-section h3,
    .download-section h3 {
        font-size: 1.3rem;
    }
    
    .download-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
}

/* 横屏手机优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .header {
        padding: 20px 0 15px;
    }
    
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .intro-section {
        margin-bottom: 40px;
    }
    
    .features-section {
        margin-bottom: 40px;
    }
    
    .lottery-types {
        margin-bottom: 40px;
    }
}

/* 高DPI屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo i,
    .feature-icon i {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .feature-card:hover {
        transform: none;
    }
    
    .lottery-item:hover {
        transform: none;
    }
    
    .download-btn:hover {
        transform: none;
    }
    
    /* 增加触摸区域 */
    .lottery-item {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .download-btn {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* 可访问性优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .logo i {
        animation: none;
    }
}

/* 暗黑模式支持 */
@media (prefers-color-scheme: dark) {
    .main-content {
        background: #1a1a1a;
        color: #e0e0e0;
    }
    
    .intro-section h2,
    .features-section h3,
    .lottery-types h3 {
        color: #ffffff;
    }
    
    .feature-card {
        background: linear-gradient(135deg, #2a2a2a 0%, #1e1e1e 100%);
        color: #e0e0e0;
    }
    
    .feature-card h4 {
        color: #ffffff;
    }
    
    .description {
        color: #cccccc;
    }
}