/* 通用样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #004d99;
    --text-color: #333333;
    --light-bg: #f5f5f5;
    --white: #ffffff;
    --footer-bg: #2c3a47;
    --footer-text: #fff;
    --footer-link: #bfc9d1;
    --footer-link-hover: #fff;
    --max-width: 1200px;
    --header-height: 80px;
    --nav-bg: rgba(255, 255, 255, 0.98);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: text;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
}

body {
    font-family: "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 底部样式 */
footer {
    background: #2c3e50;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
    flex: 0 0 200px;
}

.footer-logo .logo-img {
    height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-middle {
    flex: 0 0 600px;
    display: flex;
    justify-content: space-between;
}

.footer-section {
    flex: 1;
}

.footer-section h4 {
    font-size: 14px;
    margin-bottom: 15px;
    color: #fff;
    font-weight: normal;
}

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

.footer-section ul li {
    margin-bottom: 8px;
    font-size: 12px;
    color: rgba(255,255,255,0.8);
}

.footer-section ul li a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-contact {
    flex: 0 0 300px;
}

.footer-contact h4 {
    font-size: 14px;
    margin-bottom: 15px;
    color: #fff;
    font-weight: normal;
}

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

.footer-contact ul li {
    margin-bottom: 8px;
    font-size: 12px;
    color: rgba(255,255,255,0.8);
}

.footer-contact .wechat {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact .wechat img {
    width: 100px;
    height: 100px;
    border-radius: 4px;
}

.footer-contact .wechat span {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    color: rgba(255,255,255,0.6);
    font-size: 14px;
}

.footer-bottom span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: #fff;
}

.footer-bottom img {
    height: 16px;
    width: auto;
    margin-right: 5px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .footer-top {
        flex-direction: column;
        gap: 30px;
    }

    .footer-logo {
        flex: none;
        text-align: center;
    }

    .footer-middle {
        flex: none;
        flex-direction: column;
        gap: 30px;
    }

    .footer-contact {
        flex: none;
        text-align: center;
    }

    .footer-contact .wechat {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}