body{
    background-color: #ffffff;
}

.header{
    height: 90px;
    background: linear-gradient(135deg, #ffffff 0%, #f0f7f4 100%);
    margin: auto;
    box-shadow: 0 2px 15px rgba(10, 77, 60, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(212, 175, 55, 0.15);
}
.header::before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #d4af37, transparent);
}
.top{
    width: 1200px;
    margin: auto;
    max-width: 100%;
    padding: 0 40px;
    box-sizing: border-box;
}
.top_logo{
    float: left;
    width: auto;
    margin-top: 0;
    position: relative;
}
.top_logo::before{
    content: '';
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 35px;
    background: linear-gradient(180deg, #0a4d3c, #1a5f4e);
}
.top_logo a{
    display: block;
    height: 90px;
    line-height: 90px;
    font-size: 26px;
    color: #0a4d3c;
    font-weight: 800;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    text-transform: uppercase;
}
.top_logo a:hover{
    color: #1a5f4e;
    letter-spacing: 3px;
}
.top_nav ul li:first-child{
    margin-left: 280px;
}
.top_nav ul li{
    float: left;
    margin: 0 25px;
}
.top_nav ul li:last-child{
    margin-left: 15px;
    margin-right: 0;
}
.top_nav ul li a{
    display: inline-block;
    height: 90px;
    line-height: 90px;
    font-size: 15px;
    color: #2d3e3a;
    position: relative;
    transition: all 0.3s ease;
    font-weight: 500;
    letter-spacing: 0.5px;
}
.top_nav ul li a::after{
    content: '';
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #0a4d3c, #1a5f4e);
    transition: width 0.3s ease;
}
.top_nav ul li a:hover::after{
    width: 100%;
}
.top_nav ul li a:hover{
    color: #0a4d3c;
}
.top_nav .relation{
    display: inline-block;
    text-align: center;
    line-height: 44px;
    font-size: 14px;
    height: 44px;
    width: 140px;
    background: linear-gradient(135deg, #d4af37 0%, #f4d03f 100%);
    border-radius: 8px;
    color: #ffffff;
    margin: 23px 0 23px 0;
    transition: all 0.3s ease;
    font-weight: 700;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}
.top_nav .relation:hover{
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(212, 175, 55, 0.5);
}
.top_nav .relation::after{
    display: none;
}

.footer{
    height: auto;
    padding: 60px 0 40px;
    background: linear-gradient(135deg, #0a4d3c 0%, #1a5f4e 100%);
    border-top: 1px solid rgba(212, 175, 55, 0.2);
    position: relative;
}
.footer::before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #d4af37, transparent);
}
.footer p{
    text-align: center;
    font-size: 14px;
    color: #e8f5f1;
    margin: 10px 0;
    transition: color 0.3s ease;
}
.footer p:hover{
    color: #d4af37;
}
.footer ul{
    width: 1200px;
    max-width: 100%;
    margin: 20px auto;
    padding: 0 20px;
    box-sizing: border-box;
}
.footer .f1{
    float: left;
    font-size: 14px;
    color: #e8f5f1;
    margin-left: 500px;
}
.footer .f1 .f1_down{
    color: #e8f5f1;
    margin-left: 55px;
}
.footer .f1 .f1_down a{
    color: #e8f5f1;
}

/* Responsive Design */
@media screen and (max-width: 1200px) {
    .top{
        width: 100%;
    }
    .top_nav ul li:first-child{
        margin-left: 200px;
    }
    .footer ul{
        width: 100%;
    }
    .footer .f1{
        margin-left: 300px;
    }
}

@media screen and (max-width: 768px) {
    .header{
        height: auto;
    }
    .top{
        width: 100%;
        padding: 10px 15px;
    }
    .top_logo{
        float: none;
        text-align: center;
        width: 100%;
    }
    .top_logo a{
        height: 60px;
        line-height: 60px;
        font-size: 20px;
    }
    .top_nav{
        float: none;
        width: 100%;
    }
    .top_nav ul{
        text-align: center;
    }
    .top_nav ul li{
        float: none;
        display: inline-block;
        margin: 0 10px;
    }
    .top_nav ul li:first-child{
        margin-left: 10px;
    }
    .top_nav ul li a{
        height: 50px;
        line-height: 50px;
        font-size: 14px;
    }
    .top_nav .relation{
        margin: 5px 0;
        width: 100px;
        height: 36px;
        line-height: 36px;
        font-size: 13px;
    }
    .footer{
        padding: 30px 0;
    }
    .footer .f1{
        float: none;
        margin-left: 0;
        text-align: center;
        width: 100%;
    }
    .footer .f1 .f1_down{
        margin-left: 0;
    }
}


/* Responsive Design */
@media screen and (max-width: 1200px) {
    .top{
        width: 100%;
    }
    .top_nav ul li:first-child{
        margin-left: 200px;
    }
    .footer ul{
        width: 100%;
    }
    .footer .f1{
        margin-left: 300px;
    }
}

@media screen and (max-width: 768px) {
    .header{
        height: auto;
    }
    .top{
        width: 100%;
        padding: 10px 20px;
    }
    .top_logo{
        float: none;
        text-align: center;
        width: 100%;
    }
    .top_logo::before{
        display: none;
    }
    .top_logo a{
        height: 70px;
        line-height: 70px;
        font-size: 22px;
    }
    .top_nav{
        float: none;
        width: 100%;
    }
    .top_nav ul{
        text-align: center;
    }
    .top_nav ul li{
        float: none;
        display: inline-block;
        margin: 0 12px;
    }
    .top_nav ul li:first-child{
        margin-left: 12px;
    }
    .top_nav ul li a{
        height: 60px;
        line-height: 60px;
        font-size: 14px;
    }
    .top_nav .relation{
        margin: 10px auto;
        width: 120px;
        height: 40px;
        line-height: 40px;
        font-size: 13px;
    }
    .footer{
        padding: 40px 0 30px;
    }
    .footer .f1{
        float: none;
        margin-left: 0;
        text-align: center;
        width: 100%;
    }
    .footer .f1 .f1_down{
        margin-left: 0;
    }
}