@media only screen and (min-width : 1000px) {
    .abt {
        width: 100%;
        height: 540px;
        position: relative;
        overflow: hidden;
        background: no-repeat url(../pic/about-bg1.jpg);
        background-size: cover;
    }
    .abt-f1 {
        right: 0;
        margin: 200px 30% 0 auto;
        padding: 48px;
        background-color: #ffffff30;
        width: 660px;
        position: absolute;
        border-bottom: solid 2px #a00;
    }
    .abt-t1 {
        color: #666;
        font-size: 36px;
    }

    .rct {
        padding: 8px 0;
        width: 100%;
        height: 100%;
        display: flex;
        background-color: #aaa;
    }
    .rct-f1 {
        margin: 0 auto;
        display: flex;
        align-items: center;
    }
    .rct-t1 {
        padding: 8px;
        font-size: 28px;
        text-align: center;
    }
    .rct-lk1 {
        width: 160px;
        color: #ddd;
        text-decoration: none;
        background-color: #888;
        border-radius: 10px;
        overflow: hidden;
    }
    .rct-lk1:hover .rct-t1 {
        color: #000;
    }

    .art {
        background-color: #666;
        display: grid;
        overflow: hidden;
        grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
    }
    .art-art1 {
        margin: 48px auto;
        width: 480px;
        background-color: #ddd;
        border-radius: 10px;
        border-bottom: solid 2px #a00;
    }
    .art-t1 {
        padding: 10px 0;
        text-align: center;
        width: 100%;
        font-size: 28px;
        border-bottom: solid 1px #666;
    }
    .art-t2 {
        padding: 10px 20px;
        font-size: 20px;
    }

    .pln {
        padding: 48px 0;
        width: 100%;
        height: 100%;
        background-color: #444;
    }
    .pln-f1 {
        margin: 0 auto;
        width: 840px;
        background-color: #ddd;
        border-radius: 10px;
        border-bottom: solid 2px #a00;
    }
    .pln-t1 {
        padding: 12px 0;
        font-size: 32px;
        text-align: center;
        border-bottom: solid 1px #666;
    }
    .pln-t2 {
        padding: 18px 0;
        font-size: 24px;
        text-align: center;
    }
}
@media only screen and (max-width : 999px) {
    .abt {
        width: 100%;
        height: 360px;
        position: relative;
        background: no-repeat url(../pic/about-bg1.jpg);
        background-size: cover;
    }
    .abt-f1 {
        margin: 10% 0 0 10%;
        padding: 48px;
        background-color: #ffffff30;
        max-width: 360px;
        position: absolute;
        border-bottom: solid 2px #a00;
    }
    .abt-t1 {
        color: #666;
        font-size: 24px;
    }

    .rct {
        padding: 8px 0;
        width: 100%;
        height: 100%;
        display: flex;
        background-color: #aaa;
    }
    .rct-f1 {
        margin: 0 auto;
        display: flex;
        align-items: center;
    }
    .rct-t1 {
        padding: 8px;
        font-size: 20px;
        text-align: center;
    }
    .rct-lk1 {
        width: 160px;
        color: #ddd;
        text-decoration: none;
        background-color: #888;
        border-radius: 10px;
        overflow: hidden;
    }
    .rct-lk1:hover .rct-t1 {
        color: #000;
    }

    .art {
        display: grid;
        overflow: hidden;
        grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
        background-color: #666;
    }
    .art-art1 {
        margin: 12px auto;
        width: 360px;
        background-color: #ddd;
        border-radius: 10px;
        border-bottom: solid 2px #a00;
    }
    .art-t1 {
        padding: 4px 0;
        text-align: center;
        width: 100%;
        font-size: 20px;
        border-bottom: solid 1px #666;
    }
    .art-t2 {
        padding: 4px 8px;
        font-size: 16px;
    }

    .pln {
        padding: 12px 0;
        width: 100%;
        height: 100%;
        background-color: #444;
    }
    .pln-f1 {
        margin: 0 auto;
        width: 90%;
        background-color: #ddd;
        border-radius: 4px;
        border-bottom: solid 2px #a00;
    }
    .pln-t1 {
        padding: 4px 0;
        font-size: 24px;
        text-align: center;
        border-bottom: solid 1px #666;
    }
    .pln-t2 {
        padding: 4px 0;
        font-size: 16px;
        text-align: center;
    }
}