/**
 * 页脚样式 - 官方大气，响应式
 * 背景色 #1a2744
 */

.site-footer {
    background: #1a2744;
    color: #b0c4de;
    padding: 40px 0 20px;
    font-size: 14px;
    line-height: 1.8;
    border-top: 3px solid #2a3a5c;
}

.site-footer a {
    color: #b0c4de;
    text-decoration: none;
    transition: color 0.3s;
}
.site-footer a:hover {
    color: #ffffff;
}

/* ===== 上部三列布局 ===== */
.footer-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding-bottom: 30px;
    border-bottom: 1px solid #2a3a5c;
    margin-bottom: 20px;
}

.footer-col {
    flex: 1 1 220px;
    min-width: 160px;
    margin-bottom: 25px;
    padding-right: 20px;
}

/* 联系我们列 - 占比1 */
.footer-contact {
    flex: 1 1 240px;
}
.footer-contact ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-contact li {
    padding: 4px 0;
    display: flex;
    align-items: center;
}
.footer-contact li i {
    width: 24px;
    color: #4a7a9a;
    margin-right: 8px;
    font-size: 16px;
}

/* 快速导航列 - 占比1，限制最大宽度 */
.footer-links {
    flex: 1 1 240px;
    max-width: 280px; /* 防止过宽 */
}
.footer-links h4,
.footer-contact h4,
.footer-qrcode h4 {
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 16px; /* 行4px，列16px */
}
.footer-links li {
    padding: 3px 0;
}
.footer-links a::before {
    content: "› ";
    color: #4a6a8a;
    font-size: 18px;
}

/* 关注我们列 - 占比0.8 */
.footer-qrcode {
    flex: 0.8 1 180px;
}
.qrcode-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.qrcode-item {
    text-align: center;
}
.qrcode-item img {
    max-width: 100px;
    height: auto;
    border: 2px solid #2a3a5c;
    border-radius: 6px;
    background: #fff;
    padding: 4px;
    display: block;
}
.qrcode-item p {
    margin-top: 6px;
    color: #8aa4c8;
    font-size: 13px;
}

/* ===== 底部版权（左右结构） ===== */
.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding-top: 5px;
    font-size: 13px;
    color: #7a94b8;
}
.footer-bottom a {
    color: #7a94b8;
}
.footer-bottom a:hover {
    color: #fff;
}
.footer-copyright p {
    margin: 2px 0;
}
.footer-extra a {
    margin-left: 0;
}

/* ===== 响应式 ===== */

/* 平板及以下：三列变两列 */
@media screen and (max-width: 992px) {
    .footer-col {
        flex: 1 1 45%;
    }
    .footer-contact {
        flex: 1 1 100%;
    }
    .footer-links {
        max-width: none; /* 平板上不限制宽度 */
    }
    .footer-links ul {
        gap: 4px 16px;
    }
}

/* 手机：隐藏快速导航，联系人与二维码上下排列，底部居中 */
@media screen and (max-width: 768px) {
    .site-footer {
        padding: 30px 20px 15px;
    }
    .footer-top {
        flex-direction: column;
    }
    .footer-links {
        display: none;
    }
    .footer-col {
        flex: 1 1 100%;
        padding-right: 0;
        border-bottom: 1px solid #2a3a5c;
        padding-bottom: 20px;
        margin-bottom: 20px;
    }
    .footer-col:last-of-type {
        border-bottom: none;
        margin-bottom: 0;
    }
    .qrcode-wrap {
        justify-content: center;
    }
    .footer-contact ul {
        text-align: left;
    }
    .footer-contact li {
        justify-content: flex-start;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        justify-content: center;
    }
    .footer-extra {
        margin-top: 6px;
    }
}

/* 小屏手机 */
@media screen and (max-width: 480px) {
    .site-footer {
        padding: 20px 12px 10px;
        font-size: 13px;
    }
    .footer-col h4 {
        font-size: 15px;
    }
    .qrcode-item img {
        max-width: 80px;
    }
}