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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', '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: 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    padding: 60px 20px;
    color: white;
}

/* 头像容器 */
.avatar-container {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid white;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    background: white;
}

.avatar-img:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.main-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.95;
    font-weight: 300;
}

/* 社交媒体图标 */
.social-icons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.social-icon svg {
    width: 24px;
    height: 24px;
}

.download-btn {
    display: inline-block;
    background: #ff6b6b;
    color: white;
    padding: 15px 40px;
    font-size: 1.2rem;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    font-weight: bold;
}

.download-btn:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

/* 通用区块样式 */
section {
    background: white;
    border-radius: 20px;
    padding: 40px;
    margin: 30px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.section-title {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #333;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

/* 交易所下载区域 */
.exchange-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.exchange-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
    padding: 25px;
    position: relative;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.exchange-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    border-color: #667eea;
}

.exchange-header {
    margin-bottom: 15px;
    text-align: center;
}

.exchange-name {
    font-size: 1.8rem;
    font-weight: bold;
    color: #333;
}

.download-link {
    display: block;
    background: white;
    color: #667eea;
    padding: 12px 20px;
    border-radius: 10px;
    text-decoration: none;
    text-align: center;
    font-weight: bold;
    transition: all 0.3s ease;
    border: 2px solid #667eea;
}

.download-link:hover {
    background: #667eea;
    color: white;
    transform: scale(1.05);
}

.recommend-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #ff6b6b;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

/* 备用下载区域 */
.backup-section {
    background: linear-gradient(135deg, #ffeaa7 0%, #fdcb6e 100%);
}

.backup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.backup-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
}

.backup-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.backup-card h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.backup-link {
    display: block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 12px 20px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.backup-link:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.backup-badge {
    display: inline-block;
    background: #fdcb6e;
    color: #333;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

/* 教程区域 */
.tutorial-section {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.tutorial-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    transition: all 0.3s ease;
    border-left: 4px solid #667eea;
}

.tutorial-card:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.tutorial-card h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.tutorial-link {
    display: inline-block;
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.tutorial-link:hover {
    border-bottom-color: #667eea;
    color: #764ba2;
}

/* 视频播放模态框 */
.video-modal-content {
    position: relative;
    width: 90%;
    max-width: 1200px;
    background: transparent;
}

.video-close-btn {
    position: absolute;
    top: -40px;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10001;
}

.video-close-btn:hover {
    background: white;
    transform: scale(1.1);
}

/* 客服支持区域 */
.support-section {
    background: linear-gradient(135deg, #d299c2 0%, #fef9d7 100%);
    text-align: center;
}

.support-info p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    color: #333;
}

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

.contact-btn {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    border: 2px solid #667eea;
}

.contact-btn:hover {
    background: #667eea;
    color: white;
    transform: scale(1.05);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 30px 20px;
    color: white;
}

.footer p {
    margin: 5px 0;
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .avatar-img {
        width: 120px;
        height: 120px;
        border-width: 4px;
    }

    .main-title {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .social-icons {
        gap: 15px;
        margin-bottom: 25px;
    }

    .social-icon {
        width: 45px;
        height: 45px;
    }

    .social-icon svg {
        width: 22px;
        height: 22px;
    }

    section {
        padding: 25px 20px;
    }

    .exchange-grid,
    .backup-grid,
    .tutorial-grid {
        grid-template-columns: 1fr;
    }

    .contact-buttons {
        flex-direction: column;
        align-items: center;
    }

    .contact-btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .avatar-img {
        width: 100px;
        height: 100px;
        border-width: 3px;
    }

    .main-title {
        font-size: 2rem;
    }

    .social-icons {
        gap: 12px;
        margin-bottom: 20px;
    }

    .social-icon {
        width: 40px;
        height: 40px;
    }

    .social-icon svg {
        width: 20px;
        height: 20px;
    }

    .download-btn {
        padding: 12px 30px;
        font-size: 1rem;
    }
}

/* 微信客服悬浮按钮 */
.wechat-float-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, #07c160, #06ad56);
    color: white;
    padding: 15px 20px;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(7, 193, 96, 0.4);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 9999;
    transition: all 0.3s ease;
    font-weight: bold;
}

.wechat-float-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(7, 193, 96, 0.6);
    background: linear-gradient(135deg, #06ad56, #05994a);
}

.wechat-icon {
    font-size: 1.5rem;
}

.wechat-text {
    font-size: 1rem;
}

@media (max-width: 768px) {
    .wechat-float-btn {
        bottom: 20px;
        right: 20px;
        padding: 12px 16px;
    }
    
    .wechat-text {
        font-size: 0.9rem;
    }
    
    .wechat-icon {
        font-size: 1.3rem;
    }
}