/* contact.html 专用样式 */

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏样式 - 版本2 (黄红渐变) */
header {
    background: linear-gradient(90deg, #ffcc00, #ff3b30);
    padding: 10px 0;
    position: relative;
    z-index: 1000;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 18px;
    font-weight: bold;
    color: #000000;
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 15px;
}

.nav a {
    color: #000000;
    text-decoration: none;
    font-size: 12px;
    font-weight: bold;
    transition: all 0.3s;
}

.nav a:hover {
    text-decoration: underline;
}

/* 主要内容区样式 */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 40px 20px;
}

.content-overlay {
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    padding: 60px;
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 10;
}

.content-overlay h1 {
    font-size: 24px;
    font-weight: bold;
    color: #ffcc00;
    margin-bottom: 20px;
}

.content-overlay p {
    color: #ffffff;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.content-overlay ul {
    list-style: none;
    margin-bottom: 20px;
    text-align: left;
    display: inline-block;
}

.content-overlay li {
    color: #ffffff;
    font-size: 14px;
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.content-overlay li::before {
    content: "•";
    color: #ffffff;
    position: absolute;
    left: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .content-overlay {
        padding: 40px;
        margin: 20px;
    }
    
    .content-overlay h1 {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .content-overlay {
        padding: 30px;
        border-radius: 20px;
    }
    
    .content-overlay h1 {
        font-size: 18px;
    }
    
    .content-overlay p,
    .content-overlay li {
        font-size: 12px;
    }
}