html * {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

*,
*:after,
*:before {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

body {
    font-size: 100%;
    color: #000;
    background-color: #ffffff;
}

img {
    max-width: 100%;
}

.cd-container {
    /* 这个类的作用是给元素设定最大宽度，当元素达到这个最大宽度时，让元素水平居中 */
    width: 90%;
    max-width: 1170px;
    margin: 0 auto;
}

.cd-container::after {
    content: "";
    display: table;
    clear: both;
}

#timeline {
    position: relative;
    padding: 2em 0;
    margin-top: 2em;
    margin-bottom: 2em;
}

#timeline::before {
    /* 垂直线 */
    content: "";
    position: absolute;
    top: 0;
    left: 18px;
    height: 100%;
    width: 4px;
    background: #d7e4ed;
}

@media only screen and (min-width: 1170px) {
    #timeline {
        margin-top: 3em;
        margin-bottom: 3em;
    }

    #timeline::before {
        left: 50%;
        margin-left: -2px;
    }
}

.timeline-block {
    position: relative;
    margin: 2em 0;
}

.timeline-block:after {
    content: "";
    display: table;
    clear: both;
}

.timeline-block:first-child {
    margin-top: 0;
}

.timeline-block:last-child {
    margin-bottom: 0;
}

@media only screen and (min-width: 1170px) {
    .timeline-block {
        margin: 4em 0;
    }

    .timeline-block:first-child {
        margin-top: 0;
    }

    .timeline-block:last-child {
        margin-bottom: 0;
    }
}

.timeline-round {
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    box-shadow: 0 0 0 4px white, inset 0 2px 0 rgba(0, 0, 0, 0.08),
        0 3px 0 4px rgba(0, 0, 0, 0.05);
}

.timeline-round {
    background-color: #c49582;
}


@media only screen and (min-width: 1170px) {
    .timeline-round {
        width: 60px;
        height: 60px;
        left: 50%;
        margin-left: -30px;
    }

    .cssanimations .timeline-round.is-hidden {
        visibility: hidden;
    }
}

.timeline-content {
    position: relative;
    margin-left: 60px;
    background: #fcece5;
    border-radius: 0.25em;
    padding: 1em;
    box-shadow: 0 3px 0 #d7e4ed;
}

.timeline-content:after {
    content: "";
    display: table;
    clear: both;
}

.timeline-content h2 {
    color: #303e49;
}

.timeline-content p {
    font-size: medium;
}

.timeline-content .cd-date {
    font-size: 13px;
    font-size: 0.8125rem;
}

.timeline-content .cd-date {
    display: inline-block;
}

.timeline-content p {
    margin: 1em 0;
    line-height: 1.6;
}

.no-touch .timeline-content .cd-read-more:hover {
    background-color: #bac4cb;
}

.timeline-content .cd-date {
    float: left;
    padding: 0.8em 0;
    opacity: 0.7;
}

.timeline-content::before {
    content: "";
    position: absolute;
    top: 16px;
    right: 100%;
    height: 0;
    width: 0;
    border: 7px solid transparent;
    border-right: 7px solid white;
}

@media only screen and (min-width: 768px) {
    .timeline-content h2 {
        font-size: 20px;
        font-size: 1.25rem;
    }

    .timeline-content p {
        font-size: 16px;
        font-size: 1rem;
    }

    .timeline-content .cd-date {
        font-size: 14px;
        font-size: 0.875rem;
    }
}

@media only screen and (min-width: 1170px) {
    .timeline-content {
        margin-left: 0;
        padding: 1.6em;
        width: 45%;
    }

    .timeline-content::before {
        top: 24px;
        left: 100%;
        border-color: transparent;
        border-left-color: white;
    }

    .timeline-content .cd-date {
        position: absolute;
        width: 100%;
        left: 122%;
        top: 6px;
        font-size: 16px;
        font-size: 1rem;
    }

    .timeline-block:nth-child(even) .timeline-content {
        float: right;
    }

    .timeline-block:nth-child(even) .timeline-content::before {
        top: 24px;
        left: auto;
        right: 100%;
        border-color: transparent;
        border-right-color: white;
    }

    .timeline-block:nth-child(even) .timeline-content .cd-read-more {
        float: right;
    }

    .timeline-block:nth-child(even) .timeline-content .cd-date {
        left: auto;
        right: 122%;
        text-align: right;
    }

    .cssanimations .timeline-content.is-hidden {
        visibility: hidden;
    }


}