.nav {
    width: 100%;
    height: 80px;
    background-image: url('https://cdn1.guoxinshujian.com/image/home/nav-back.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    padding: 0 120px;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0.5;
    pointer-events: none;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-right: 80px;
}

.logo {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
}

.logo img {
    width: 45px;
    height: 45px;
    object-fit: contain;
}

.brand-name {
    font-family: "Noto Serif SC", serif;
    color: #FFFFFF;
    font-size: 24px;
    font-weight: 500;
}

.nav-center {
    display: flex;
    gap: 24px;
    margin-left: 0;
    margin-right: auto;
}

.nav-link {
    font-family: "Noto Sans SC Semibold", sans-serif;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    position: relative;
    padding: 8px 0;
    transition: color 0.3s ease;
    text-align: left;
}

.nav-link:hover {
    color: #FFFFFF;
}

.nav-link.active {
    color: #FFFFFF;
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -14px;
    left: 0;
    width: 100%;
    height: 14px;
    background: url('https://cdn1.guoxinshujian.com/image/home/nav-select2.png') no-repeat center/cover;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #FFFFFF;
}

.nav-right a {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: #FFFFFF;
}

.nav-right i {
    font-size: 16px;
}

.nan-contact {
    font-family: "Noto Sans SC Medium", sans-serif;
    font-size: 14px;
}

.phone-icon {
    width: 16px;
    height: 16px;
    fill: #FFFFFF;
}


.float-buttons {
    position: fixed;
    right: 20px;
    top: 528px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.float-btn {
    width: 60px;
    height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.float-btn.primary {
    background: linear-gradient(to bottom, #AD7036, #6C421B);
}

.float-btn.secondary {
    background: #6C421B;
}

.float-btn.white {
    background: #FFFFFF;
}

.float-btn .icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.float-btn .icon svg {
    width: 28px;
    height: 28px;
}

.float-btn .text {
    color: #FFFFFF;
    font-size: 12px;
    font-family: "Noto Sans SC", sans-serif;
}

.float-btn.white .icon svg {
    opacity: 0.27;
}

.float-btn:hover {
    opacity: 0.9;
}

@media (max-width: 1440px) {
    .nav {
        padding: 0 80px;
    }
}

@media (max-width: 1200px) {
    .nav {
        padding: 0 40px;
    }

    .nav-left {
        margin-right: 40px;
    }

    .nav-center {
        gap: 16px;
    }

    .nav-link {
        font-size: 14px;
    }

    .brand-name {
        font-size: 20px;
    }

    .logo {
        width: 40px;
        height: 40px;
    }

    .logo img {
        width: 40px;
        height: 40px;
    }

    .float-btn{
        width: 50px;
        height: 50px;
    }

    .float-btn .text{
        font-size: 9px;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 0 20px;
    }

    .nav-center {
        display: none;
    }

    .nav-right span {
        display: none;
    }
}