/* 页面布局 - 确保footer始终在底部 */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 确保导航栏不受flex影响 */
.navbar {
    flex-shrink: 0;
}

/* 确保footer不受flex影响 */
.footer {
    flex-shrink: 0;
}

/* 主要内容区域占据剩余空间 */
.main-content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
    padding: 40px 0;
    box-sizing: border-box;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.main-content-left {
    flex: 1;
    max-width: 550px;
    padding-right: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
}

.main-content-right {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 320px;
}

.main-content-right iframe {
    width: 100%;
    height: 500px;
    border: none !important;
    border-radius: 0;
    box-shadow: none;
    outline: none;
    transition: none;
}



h1 {
    font-size: 3rem;
    font-weight: 700;
    color: #474747;
    line-height: 1.2;
}

.gray-bold {
    color: #bdbdbd;
    font-weight: 700;
}

.dark-bold {
    color: #4a4646;
    font-weight: 700;
}

.desc {
    color: #888;
    font-size: 1.15rem;
    margin-bottom: 24px;
}

.feature-list {
    color: #888;
    font-size: 1.05rem;
    margin-bottom: 32px;
    line-height: 1.8;
    padding-left: 20px;
}

.signup-btn {
    background: linear-gradient(90deg, #ffe259 0%, #ffa751 100%);
    color: #fff;
    font-size: 1.25rem;
    font-weight: 600;
    border: none;
    border-radius: 32px;
    padding: 16px 36px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(255, 167, 81, 0.15);
    transition: box-shadow 0.2s;
    display: inline-block;
    text-decoration: none;
    text-align: center;
}

.signup-btn:hover {
    box-shadow: 0 4px 16px rgba(255, 167, 81, 0.25);
}

.earth-img {
    width: 420px;
    max-width: 100%;
    border-radius: 50%;
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.10);
    background: #222;
}

.main-title {
    display: inline-block;
    width: 628px;
    height: 118px;
    font-family: 'Roboto', Roboto, Arial, sans-serif;
    font-weight: bold;
    font-size: 54px;
    line-height: 59px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    background: linear-gradient(-90deg, #231815 0%, #B0AFB0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

@media (max-width: 900px) {

    .signup-btn {
        width: 100%;
        display: block;
        text-align: center;
    }

    .main-content {
        flex-direction: column-reverse;
        padding: 120px 10px 24px 10px;
    }

    .main-content-left,
    .main-content-right {
        max-width: 100%;
        padding: 0;
        box-sizing: border-box;
    }

    .main-content-left {
        margin-bottom: 32px;
        align-items: flex-start;
        text-align: left;
    }
    
    .main-content-right {
        margin-bottom: 40px;
        margin-top: 10px;
    }

    .main-content-right iframe {
        height: 360px;
        border: none !important;
        border-radius: 0;
        box-shadow: none;
        outline: none;
    }

    .earth-img {
        width: 260px;
    }

    .main-title {
        width: 343px;
        height: 105px;
        font-family: 'Roboto', Roboto, Arial, sans-serif;
        font-weight: bold;
        font-size: 32px;
        line-height: 35px;
        text-align: center;
        font-style: normal;
        text-transform: none;
        background: linear-gradient(180deg, #231815 0%, #B0AFB0 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        text-fill-color: transparent;
        white-space: normal;
        word-break: break-word;
        margin-top: 12px;
        margin-left: 0;
        margin-right: 0;
    }

    .desc {
        width: 343px;
        height: 25px;
        font-family: 'Roboto', Roboto, Arial, sans-serif;
        font-weight: 400;
        font-size: 18px;
        color: #7B7572;
        line-height: 25px;
        text-align: left;
        font-style: normal;
        text-transform: none;
        margin-left: 0;
        margin-right: 0;
    }

    .feature-list {
        text-align: left;
        margin-left: 0;
        margin-right: 0;
        padding-left: 20px;
        align-self: flex-start;
        width: 343px;
    }

    .feature-list li {
        text-align: left;
    }
}