body {
            background-color: #ECEDEA;
            font-family:ABC Social Cyrillic Unlicensed Trial, sans-serif;
            margin: 0;
            padding: 0;
        }

        .container {
            width: 1200px;
            margin: 0 auto;
            padding-top: 40px;
            padding-left: 80px;
        }

        header {
            display: flex;
            align-items: center;
            margin-bottom: 80px;
        }

        ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            align-items: center;
        }

        li {
            margin-right: 30px;
        }

        a {
            text-decoration: none;
            color: #1a1a1a;
            font-weight: bold;
        }

        .home-btn {
            background-color: #cf3f78;
            color: white;
            padding: 10px 20px;
            border-radius: 5px;
        }

        .join-btn {
            background-color: black;
            color: white;
            padding: 12px 24px;
            border-radius: 5px;
        }

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

        .text-box {
            width: 50%;
        }

        .subtitle {
            font-size: 32px;
            color: #333;
            font-family: ABC Social Cyrillic Unlicensed Trial, serif;
        }

        h1 {
            font-size: 60px;
            font-family: Noto , serif;
            margin: 15px 0 20px 0;
            line-height: 1.1;
        }

        .description {
            font-size: 32px;
            font-weight: bold;
            line-height: 1.5;
            margin-bottom: 40px;
        }

        .start-btn {
            background-color: #cf3f78;
            color: white;
            padding: 16px 32px;
            border-radius: 5px;
            font-weight: bold;
            font-size: 32px;
            display: inline-block;
        }

        .image-box {
            width: 45%;
        }

        .image-box img {
            width: 100%;
            height: auto;
            }
            .page-two {
            width: 100%;
        }

        .chapter {
            text-align: right;
            font-size: 18px;
            color: #cf3f78;
            margin-bottom: 15px;
        }

        .chapter span {
            color: #1a1a1a;
            margin-left: 8px;
        }

        .page-two {
           width: 100%;
           height: auto;
           padding-top: 150px;
           padding-bottom: 150px;
           position: relative;
        }

        .chapter {
            position: absolute;
            top: 25px;
            right: 0;
            font-size: 24px;
            color: #b40048;
        }

        .chapter span {
            color: #c20078;
            margin-left: 12px;
        }

        .page-two h2 {
            font-family:ABC Gramercy Unlicensed Trial, serif;
            font-size: 48px;
            margin: 0 0 40px 0;
            line-height: 1.2;
            font-weight: normal;
        }

        .page-two h3 {
            font-size:33px;
            font-weight: bold;
            margin: 0 0 25px 0;
        }

        .page-two p {
            font-family:ABC Social Cyrillic Unlicensed Trial, serif;
            font-size: 30px
            ;
            line-height: 1.5;
            color: #333;
            font-weight: bold;
            margin-bottom: 32px;
            width: 85%;
        }
        .page-three {
            width: 100%;
            height: 100vh;
            position: relative;
            background-image: url('beijingtu3.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            display: flex;
            flex-direction: column;
            justify-content: center;
            box-sizing: border-box;
            padding: 0 80px;
        }
    

.page-three h2 {
    font-family:ABC Gramercy Unlicensed Trial, serif;
    font-size: 40px;
    margin: 0 0 80px 0;
    line-height: 1.2;
    font-weight: normal;
    color: #1a1a1a;
}

.cat-corner {
    position: absolute;
    top: 0;
    right: 0;
    width: 400px;
    height: auto;
    z-index: 0;
}

.info-nav {
    width: 100%;
    position: relative;
    z-index: 1;
}

.info-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: space-between;
    align-items: stretch;
}

.info-nav li {
    width: 23%;
    display: flex;
    flex-direction: column;
}

.info-nav a {
    text-decoration: none;
    color: #1a1a1a;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.info-nav img {
    width: 70px;
    height: 70px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

.info-nav .icon-box {
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.info-nav .num {
    font-size: 32px;
    font-family: Georgia, serif;
    text-align: center;
    color: #555;
    font-weight: normal;
    height: 50px;
    line-height: 50px;
    margin: 0 0 20px 0;
}

.info-nav h3 {
    font-size: 32px;
    font-family: Georgia, serif;
    text-align: center;
    font-weight: bold;
    height: 50px;
    line-height: 50px;
    margin: 0 0 20px 0;
}

.info-nav p {
    font-size: 20px;
    line-height: 1.5;
    color: #444;
    text-align: left;
    margin: 0;
}
.page-four {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    box-sizing: border-box;
    padding: 0 100px;
    gap: 80px;
}

.corner-icon {
    position: absolute;
    top: 40px;
    right: 60px;
    width: 60px;
    height: auto;
}

.four-image {
    width: 40%;
}

.four-image img {
    width: 80%;
    height: auto;
    display: block;
}

.four-text {
    width: 50%;
}

.four-text h2 {
    font-family: GeorgiaABC Gramercy Unlicensed Trial, serif;
    font-size: 32px;
    font-weight: bold;
    margin: 0 0 40px 0;
    color: #1a1a1a;
}

.four-text p {
    font-size: 20px;
    line-height: 1.6;
    color: #333;
    margin: 0;
}
.page-five {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    box-sizing: border-box;
    padding: 0 100px;
    gap: 80px;
}

.five-text {
    width: 50%;
}

.five-text h2 {
    font-family: GeorgiaABC Gramercy Unlicensed Trial, serif;
    font-size: 32px;
    font-weight: bold;
    margin: 0 0 40px 0;
    color: #1a1a1a;
}

.five-text p {
    font-size: 20px;
    line-height: 1.6;
    color: #333;
    margin: 0;
}

.five-image {
    width: 40%;
}

.five-image img {
    width: 80%;
    height: auto;
    display: block;
}
.page-six {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    box-sizing: border-box;
    padding: 80px 100px;
}

.page-six h2 {
    font-family: Georgia, serif;
    font-size: 48px;
    font-weight: bold;
    margin: 0 0 40px 0;
    color: #1a1a1a;
    width: 100%;
    max-width: 800px;
}

.six-image {
    width: 100%;
    max-width: 800px;
    margin-bottom: 40px;
}

.six-image img {
    width: 90%;
    height: auto;
    display: block;
}

.page-six p {
    font-size: 20px;
    line-height: 1.6;
    color: #333;
    margin: 0;
    width: 100%;
    max-width: 800px;
}
@media (max-width: 900px) {

    .container {
        width: 100%;
        padding: 20px;
        box-sizing: border-box;
    }

    header {
        flex-direction: column;
        gap: 15px;
        margin-bottom: 40px;
    }

    header ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    header li {
        margin-right: 10px;
    }

    main {
        flex-direction: column;
        text-align: center;
        margin-bottom: 60px;
    }

    .text-box {
        width: 100%;
        padding-left: 0;
    }

    h1 {
        font-size: 38px;
    }

    .subtitle {
        font-size: 18px;
    }

    .description {
        font-size: 16px;
    }

    .image-box {
        width: 80%;
        margin-top: 30px;
    }

    .page-two {
        height: auto;
        padding: 40px 0;
    }

    .page-two h2 {
        font-size: 26px;
    }

    .page-two h3 {
        font-size: 18px;
    }

    .page-two p {
        font-size: 15px;
        width: 100%;
    }

    .chapter {
        position: static;
        text-align: center;
        margin-bottom: 20px;
    }

    .page-three {
        height: auto;
        padding: 60px 20px;
    }

    .page-three h2 {
        font-size: 28px;
        margin-bottom: 40px;
    }

    .cat-corner {
        width: 180px;
    }

    .info-nav ul {
        flex-direction: column;
        gap: 40px;
    }

    .info-nav li {
        width: 100%;
    }

    .info-nav .num {
        font-size: 24px;
        height: 40px;
        line-height: 40px;
    }

    .info-nav h3 {
        font-size: 22px;
        height: 40px;
        line-height: 40px;
    }

    .info-nav p {
        font-size: 16px;
    }
    .page-four {
    height: auto;
    flex-direction: column;
    padding: 60px 20px;
    gap: 30px;
}

.corner-icon {
    top: 20px;
    right: 20px;
    width: 40px;
}

.four-image {
    width: 100%;
}

.four-text {
    width: 100%;
}

.four-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
}

.four-text p {
    font-size: 16px;
}
.page-five {
    height: auto;
    flex-direction: column;
    padding: 60px 20px;
    gap: 30px;
}

.five-text {
    width: 100%;
}

.five-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
}

.five-text p {
    font-size: 16px;
}

.five-image {
    width: 100%;
}
.page-six {
    padding: 60px 20px;
}

.page-six h2 {
    font-size: 32px;
    margin-bottom: 20px;
}

.six-image {
    margin-bottom: 20px;
}

.page-six p {
    font-size: 16px;
}
}