/* 基础重置与变量 */
:root {
    --bg-dark: #0a0a0a;
    --bg-card: #1a1a1a;
    --bg-hover: #2a2a2a;
    --text-main: #e0e0e0;
    --text-muted: #999999;
    --primary-color: #d32f2f; /* 扑克红 */
    --primary-hover: #b71c1c;
    --secondary-color: #d4af37; /* 金色 */
    --border-color: #333333;
}

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

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.3s;
}

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    background-color: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav a {
    font-size: 16px;
    font-weight: 500;
    padding: 10px 0;
}

.nav a.active, .nav a:hover {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
}

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

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: #000;
}

.btn-secondary:hover {
    background-color: #bfa030;
    color: #000;
}

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

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

.btn-small {
    padding: 8px 20px;
    font-size: 14px;
}

/* 英雄区域 */
.hero {
    padding: 100px 0;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://via.placeholder.com/1920x800/111/333?text=Poker+Background') no-repeat center center/cover;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
}

.hero p {
    font-size: 20px;
    color: #ddd;
    max-width: 800px;
    margin: 0 auto 40px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 通用区块标题 */
.section-title {
    font-size: 32px;
    text-align: center;
    margin-bottom: 50px;
    color: #fff;
}

/* 平台特色 */
.features {
    padding: 80px 0;
    background-color: var(--bg-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.feature-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.feature-card h3 {
    padding: 20px 20px 10px;
    font-size: 20px;
    color: var(--secondary-color);
}

.feature-card p {
    padding: 0 20px 20px;
    color: var(--text-muted);
    font-size: 15px;
}

/* 新闻与文章区域 */
.news-section {
    padding: 80px 0;
    background-color: #111;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.column-header h2 {
    font-size: 24px;
    color: #fff;
    border-left: 4px solid var(--primary-color);
    padding-left: 10px;
}

.view-more {
    font-size: 14px;
    color: var(--text-muted);
}

.view-more:hover {
    color: var(--primary-color);
}

.news-list {
    list-style: none;
}

.news-list li {
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px dashed var(--border-color);
    display: flex;
    gap: 15px;
}

.news-list li:last-child {
    border-bottom: none;
}

.news-list .date {
    color: var(--secondary-color);
    font-size: 14px;
    white-space: nowrap;
}

.news-list a {
    font-size: 16px;
    display: block;
    line-height: 1.4;
}

/* 活动区域 */
.activities-section {
    padding: 80px 0;
    background-color: var(--bg-dark);
}

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

.activity-card {
    background-color: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.activity-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.activity-info {
    padding: 20px;
}

.activity-info h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #fff;
}

.activity-info p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
    height: 42px;
    overflow: hidden;
}

/* 页脚 */
.footer {
    background-color: #050505;
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo p {
    margin-top: 15px;
    color: var(--text-muted);
}

.footer-links h4, .footer-contact h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-muted);
}

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

.footer-contact p {
    color: var(--text-muted);
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
    .nav ul {
        display: none;
    }
    .hero h1 {
        font-size: 32px;
    }
}