article {
    position: relative;
    background: url(../images/arc_bg.jpg) no-repeat center bottom/cover;
}

.arc-title {
    padding: 15px 0;
    text-align: center;
}

.arc-title img {
    width: 1.6rem;
}

.arc-detail {
    display: none;
}

.arc-arc {
    padding-bottom: 200px;
}

.arc-arc p {
    font: 400 14px/24px "微软雅黑";
    color: #000;
    text-align: justify;
}

.arc-arc p img {
    max-width: 100%;
}

.arc-arc-bottom {
    display: block;
    position: absolute;
    z-index: 10;
    left: 0;
    bottom: 0;
    padding-bottom: 70px;
}

.arc-arc-bottom img {
    width: 100%;
}

footer {
    position: absolute;
    left: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    padding: 5px 0;
    background: #fff;
}

footer p {
    padding: 0 5px;
    font: 400 14px/20px "微软雅黑";
    color: #000;
    text-align: center;
}

@media (min-width: 1200px) {
    article {
        padding-bottom: 280px;
    }
    .arc-main {
        display: flex;
        justify-content: space-between;
        position: relative;
        z-index: 5;
        width: 1000px;
        margin: 0 auto;
    }
    .arc-left {
        width: 220px;
        text-align: center;
    }
    .arc-title {
        padding: 0;
    }
    .arc-title img {
        width: 90px;
    }
    .arc-detail {
        display: block;
        padding: 15px 0 30px;
    }
    .arc-right {
        width: 730px;
        padding: 20px;
        background: rgba(255, 255, 255, 0.8);
    }
    .common-box {
        margin: 0;
        padding: 20px;
        background: none;
        border: 3px solid #2e3131;
    }
    .arc-arc {
        padding-bottom: 200px;
    }
    .arc-arc-title {
        padding: 0 0 15px 0;
        font: bold 22px/30px "微软雅黑";
        color: #000;
        text-align: center;
    }
    .common-nav li a {
        padding: 5px 0;
    }
    .arc-arc p {
        font: 400 16px/30px "微软雅黑";
    }
    .arc-arc-bottom {
        padding-bottom: 0;
    }
    footer {
        position: absolute;
        z-index: 20;
        left: 0;
        bottom: 0;
        width: 100%;
        padding: 15px 0;
    }
}

@media (min-width: 1480px) {
    article {
        padding-bottom: 400px;
    }
    .arc-main {
        width: 1200px;
    }
    .arc-detail {
        padding: 30px 0 45px;
    }
    .arc-right {
        width: 930px;
        padding: 30px;
    }
    .common-box {
        padding: 30px;
        border: 5px solid #2e3131;
    }
    .arc-arc {
        padding-bottom: 200px;
    }
    .arc-arc-title {
        padding: 0 0 20px 0;
        font: bold 22px/30px "微软雅黑";
    }
    footer {
        padding: 15px 0;
    }
}