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

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

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

/* 广告位样式 */
.ad-banner {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    margin: 20px 0;
    border-radius: 10px;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.ad-sidebar {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 160px;
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
    z-index: 100;
}

.left-ad {
    left: 10px;
}

.right-ad {
    right: 10px;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #667eea;
}

/* 主横幅 */
.hero {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%),
                url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%23667eea" width="1200" height="600"/></svg>');
    background-size: cover;
    background-position: center;
    margin-bottom: 40px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: white;
    color: #667eea;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 18px;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* 主要内容区 */
main {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px 20px;
    margin: 20px auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.section-title {
    font-size: 32px;
    margin-bottom: 30px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 网格布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card-image {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-img {
    font-size: 80px;
}

.card-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.9);
    color: #667eea;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.card-content p {
    color: #666;
    margin-bottom: 15px;
}

.card-button {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: opacity 0.3s;
}

.card-button:hover {
    opacity: 0.9;
}

/* 独家内容区 */
.exclusive-section {
    margin: 60px 0;
}

.exclusive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.exclusive-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s;
}

.exclusive-card:hover {
    transform: scale(1.05);
}

.exclusive-icon {
    font-size: 60px;
    margin-bottom: 15px;
}

.exclusive-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.exclusive-card p {
    color: #666;
    margin-bottom: 20px;
}

.exclusive-button {
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: opacity 0.3s;
}

.exclusive-button:hover {
    opacity: 0.9;
}

/* VIP会员区 */
.vip-section {
    margin: 60px 0;
}

.vip-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 50px;
    border-radius: 20px;
    text-align: center;
    color: white;
}

.vip-banner h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.vip-banner > p {
    font-size: 18px;
    margin-bottom: 30px;
}

.vip-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.vip-feature {
    background: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: 10px;
    font-size: 16px;
}

.vip-button {
    padding: 15px 50px;
    background: white;
    color: #667eea;
    border: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.3s;
}

.vip-button:hover {
    transform: scale(1.05);
}

/* 小卡片 */
.small-card {
    text-align: center;
    padding: 20px;
}

.small-card-image {
    font-size: 50px;
    margin-bottom: 10px;
}

.small-card h4 {
    font-size: 18px;
    margin-bottom: 5px;
}

.small-card p {
    color: #28a745;
    font-weight: bold;
}

/* 页脚 */
.footer {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px 0 20px;
    margin-top: 60px;
}

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

.footer-section h4 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 18px;
}

.footer-section p {
    color: #666;
}

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

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

.footer-section ul li a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #667eea;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
        font-size: 14px;
    }

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

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

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

    .ad-sidebar {
        display: none;
    }

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

    .vip-banner {
        padding: 30px 20px;
    }

    .vip-banner h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .hero {
        height: 350px;
    }

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

    .cta-button {
        padding: 12px 30px;
        font-size: 16px;
    }
}