* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Microsoft YaHei;
}


body {
    background: #050505;
    color: white;
}



.header {
    height: 80px;
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8%;
    background: #050505dd;
    backdrop-filter: blur(15px);
    z-index: 99;
}



.logo {
    font-size: 30px;
    font-weight: bold;
}


    .logo span {
        color: #00ff88;
    }



nav a {
    text-decoration: none;
    color: #bbb;
    margin: 0 15px;
}


    nav a:hover {
        color: #00ff88;
    }

    nav a.active {
        color: #00ff88;
    }

.menu {
    display: none;
}



section {
    padding: 100px 8%;
}


h2 {
    font-size: 42px;
    margin-bottom: 50px;
}





.about-hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-image: linear-gradient( 90deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.45) 50%, rgba(0,0,0,0.1) 100% ), url("../picture/about.png");
    background-size: cover;
    background-position: center;
}


.hero-content {
    width: 50%;
}


    .hero-content > p:first-child {
        color: #00ff88;
        letter-spacing: 4px;
    }



h1 {
    font-size: 65px;
    line-height: 1.2;
    margin: 30px 0;
}


.intro {
    color: #aaa;
    line-height: 2;
    font-size: 18px;
}



button {
    margin-top: 30px;
    padding: 15px 35px;
    border: 0;
    border-radius: 40px;
    background: #00ff88;
    font-weight: bold;
}







.tech-box {
    width: 400px;
    height: 400px;
    position: relative;
}


.cube {
    position: absolute;
    top: 130px;
    left: 120px;
    width: 160px;
    height: 160px;
    background: #00ff88;
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}



.circle {
    position: absolute;
    padding: 20px;
    border: 1px solid #00ff88;
    border-radius: 30px;
}



.one {
    top: 20px;
    left: 160px;
}


.two {
    right: 20px;
    top: 180px;
}



.three {
    bottom: 40px;
    left: 130px;
}







.brand-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}



.big-text {
    font-size: 80px;
    color: #00ff88;
    font-weight: bold;
}



.brand-content p {
    width: 40%;
    color: #aaa;
    line-height: 2;
}





.mission-grid,
.tech-grid,
.team-list,
.service-box,
.numbers {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 25px;
}



    .mission-grid div,
    .tech-grid div,
    .team-list div,
    .service-box div,
    .numbers div {
        background: #111;
        border: 1px solid #222;
        padding: 35px;
        border-radius: 20px;
    }



h3 {
    color: #00ff88;
    margin-bottom: 15px;
}



.steps {
    display: flex;
    justify-content: center;
    gap: 20px;
}



    .steps div {
        background: #111;
        border: 1px solid #00ff88;
        padding: 25px;
        text-align: center;
    }




strong {
    font-size: 55px;
    color: #00ff88;
}





.culture {
    text-align: center;
    font-size: 35px;
}



.contact {
    text-align: center;
    background: #00ff88;
    color: #000;
}



    .contact button {
        background: #000;
        color: #fff;
    }



footer {
    background: #000;
    padding: 50px;
    text-align: center;
    color: #777;
}





@media(max-width:900px) {


    nav {
        display: none;
    }


    .menu {
        display: block;
    }


    .about-hero {
        flex-direction: column;
        height: auto;
        padding-top: 150px;
    }


    .hero-content {
        width: 100%;
    }


    h1 {
        font-size: 42px;
    }



    .tech-box {
        margin-top: 50px;
    }



    .brand-content {
        flex-direction: column;
    }



    .big-text {
        font-size: 50px;
    }


    .brand-content p {
        width: 100%;
    }



    .mission-grid,
    .tech-grid,
    .team-list,
    .service-box,
    .numbers {
        grid-template-columns: 1fr;
    }



    .steps {
        flex-direction: column;
    }
}

/* 友情链接 */

.friend-links {
    margin-top: 45px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}



    .friend-links a {
        min-width: 180px;
        padding: 14px 25px;
        background: rgba(0,0,0,.08);
        border: 1px solid rgba(0,0,0,.2);
        border-radius: 30px;
        color: #000;
        text-decoration: none;
        font-weight: 600;
        transition: .3s;
    }




        .friend-links a:hover {
            background: #000;
            color: #00ff88;
            transform: translateY(-5px);
        }

/* =========================
        FAQ SECTION
========================= */


.faq {
    padding: 90px 10%;
    background: #050505;
    color: #fff;
}



    .faq h2 {
        text-align: center;
        font-size: 38px;
        margin-bottom: 50px;
        color: #ffffff;
    }




    .faq > div {
        max-width: 1000px;
        margin: 0 auto 20px;
        padding: 30px 35px;
        background: #111111;
        border-radius: 16px;
        border: 1px solid rgba(0,170,255,.18);
        transition: .35s ease;
    }




        .faq > div:hover {
            transform: translateY(-6px);
            border-color: #00aaff;
            box-shadow: 0 15px 40px rgba(0,170,255,.2);
        }



    .faq h3 {
        font-size: 21px;
        color: #fff;
        margin-bottom: 15px;
        font-weight: 600;
    }



    .faq p {
        font-size: 16px;
        color: #b8b8b8;
        line-height: 1.9;
        margin: 0;
    }