* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Source Han Sans CN', sans-serif; /* 字体 */
}


/* Header */
header {
    width: 100%;
    height: 7vh;
    min-height: 50px;
    max-height: 90px;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(100,160,200,0.06);
    padding: 0 20px;
    font-family: 'Source Han Sans CN', sans-serif; /* 字体 */
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 32px;
}

.header-lang {
    font-size: 14px;
    color: #3E9ACC;
}

.header-btn {
    font-weight: bold;
    background: #3E9ACC;
    color: #fff;
    border: none;
    padding: 6px 16px;
    margin: 0 12px;
    border-radius: 22px;
    font-size: 15px;
    cursor: pointer;
    transition: background .2s;
}
    .header-btn:hover {
        background: #127CBE;
    }
    .header-btn img {
        width: 20px;
        height: 20px;
        margin-right: 6px;
    }

.header-logo {
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    align-items: center; /* 垂直居中 */
    justify-content: space-between; /* 左右分布，可选 */
    padding: 0 20px; /* 可选，左右内边距 */
    box-sizing: border-box;
}

    nav ul {
        display: flex;
        list-style: none;
        gap: 6vh;
        margin-top: 2.2vh;
    }
    nav ul li {
        font-size: 16px;
        color: #1B1F31;
        cursor: pointer;
        padding-bottom: 5px;
    }
        nav ul li.active,
        nav ul li:hover {
            color: #127CBE;
            border-bottom: 2px solid #127CBE;
            font-weight: 600;
        }

.main-container {
    overflow-x: hidden;
    font-family: 'Source Han Sans CN', sans-serif; /* 字体 */
    background: #F7FBFE;
    color: #222;
    /* 新增：使容器成为Flex容器 */
    display: flex;
    flex-direction: column; /* 子元素垂直排列 */
    align-items: center; /* 水平居中对齐子元素 */
}

.main-btn {
    background: linear-gradient(135deg,#3E9ACC 0%,#77BCD9 100%);
    color: #fff;
    border: none;
    border-radius: 28px;
    padding: 16px 32px;
    font-size: 18px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background .2s;
}

    .main-btn img {
        height: 24px;
        display: inline-block;
    }

    .main-btn:hover {
        background: linear-gradient(135deg,#127CBE 0%,#3E9ACC 100%);
    }

footer {
    width: 100%;
    /*border-top: 1px dashed #ccc;  模拟虚线边框，与设计呼应 */
    padding: 10vh 0 5vh;
    background-color: #fcfcfc;
}

.footer-inner {
    width: 76%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap:20px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    
    
}
    .footer-logo p {
        display: flex;
        flex-direction: row;
        color: #002F41;
        font-size: 16px;
        width: 320px;
    }
    .footer-logo .logo-text {
        /* 模拟 logo 文字样式，实际项目替换为 <img> 标签 */
        font-size: 24px;
        color: #0088cc;
        font-weight: bold;
        margin-bottom: 4px;
    }

    .footer-logo .company-name {
        font-size: 16px;
        color: #333;
        margin-bottom: 12px;
    }

.footer-contact p {
    margin-bottom: 6px;
    color: #666;
    font-size: 14px;
}

.footer-nav {
    width:  92vh;
    display: flex;
    margin-top: 2vh;
    /* gap: 35vh; 控制导航列间距 */
    display:flex;
    justify-content:space-between;
    align-items: center;
}

  .footer-nav-column {
        display: flex;
        flex-direction: column;
        line-height: 2.5;
    }

.footer-nav-column h4 {
    color: #002F41;
    font-size: 18px;
    font-family:700;
}

.footer-nav-column ul {
    list-style: none;
}

    .footer-nav-column ul li {
        font-size: 16px;
        cursor: pointer;
        transition: color 0.2s;
    }

        .footer-nav-column ul li:hover {
            color: #007bff;
        }

.footer-middle {
    display: flex;
    flex-direction: column;
    align-items: center;
}

    .footer-middle .line {

        height: 5px; /* 红线粗细 */
        background-color: #EEF0F4;
        margin: 10px 0;
    }

.social-icons {
    display: flex;
    gap: 8px;
}

    .social-icons img {
        width: 40px;
        height: 40px;
        border-radius: 2px;
        display: inline-block;
    }

.footer-copyright {
    color: #002F41;
    font-size: 16px;
    text-align: right;
    opacity: 0.8;
}