* {
    margin: 0;
    padding: 0;
}

header {
    background-color: #FE6903;
    color: white;
    padding: 10px 20px;

}

nav {
    margin: auto;
    max-width: 1200px;
    display: flex;
    justify-content: space-around;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    line-height: 40px;
}

main {
    max-width: 1200px;
    margin: auto;
    overflow: hidden;
}

.banner {
    font-weight: 900;
}

.app-info {
    width: 30%;
    float: left;
    margin-left: 20px;
}

.app-info .app-interface-text {
    color: #FE6903;
    margin-top: 40px;
    margin-bottom: 10px;
}

.app-logo {
    width: 120px;
    margin-bottom: 10px;
    
}

.app-name {
    font-size: 35px;
    font-weight: bold;
    color: #FE6903;
    margin-bottom: 5px;
}

.app-desc {
    margin-bottom: 10px;
    color: #FE6903;
}

.app-year {
    color: #FE6903;
    margin-top: 100px;
}

.watch-img {
    width: 30%;
    float: left;
    transform: scaleX(-1);
}

.phone-img {
    width: 20%;
    float: right;
}
.theme-section {
            clear: both;
            width: 100%;
            position: relative;
        }

        .theme-bg {
            width: 100%;
            height: auto;
            display: block;
        }

        .theme-text,
        .theme-text1 {
            width: 100%;
            color: white;
            font-size: 72px;
            font-weight: bold;
            text-align: center;
            position: absolute;
            top: 35%;
        }

        .theme-text span {
            margin: 0 20px;
        }
        .theme-text1 span {
            margin: 0 60px;
        }
        .theme-text1 {
            font-size: 25px;
            top: 50%;
        }

        .feature-section {
            padding: 50px 20px;
            text-align: center;
        }

        .section-title {
            font-size: 44px;
            font-weight: bold;
            color: #FE6903;
            margin-bottom: 40px;
        }

        .feature-img {
            max-width: 700px;
            width: 100%;
            height: auto;
        }

        .feature-texts {
            margin-bottom: 30px;
        }

        .feature-texts p {
            color: #FE6903;
            font-weight: 600;
            font-size: 14px;
            margin-bottom: 5px;
        }

        /* 安全相伴区块 */
        .safety-section .feature-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 30px;
            margin-bottom: 30px;
        }

        .safety-img {
            width: 220px;
            height: auto;
        }

        .safety-desc {
            max-width: 300px;
            text-align: left;
            color: #FE6903;
        }

        .safety-desc p {
            font-size: 14px;
            margin-bottom: 10px;
        }

        .safety-desc p:first-child {
            font-weight: bold;
        }

        .guide-arrow {
            width: 60px;
            height: auto;
            margin: 20px auto;
        }