漂亮的响应式html时间轴UI设计效果

这是一款漂亮的响应式html时间轴UI设计效果。该时间轴UI使用简单的html和css代码，就构建出响应式的、漂亮的时间轴效果。

使用方法

HTML代码

<ul class="ul">
    <li style="--accent-color:#41516C">
        <div class="date">2002</div>
        <div class="title">Title 1</div>
        <div class="descr">Lorem ipsum, dolor sit amet consectetur adipisicing elit. Quas itaque hic quibusdam fugiat est numquam harum, accusamus suscipit consequatur laboriosam!</div>
    </li>
    <li style="--accent-color:#FBCA3E">
        <div class="date">2007</div>
        <div class="title">Title 2</div>
        <div class="descr">Lorem ipsum dolor sit, amet consectetur adipisicing elit. Quos adipisci nobis nostrum vero nihil veniam.</div>
    </li>
    <li style="--accent-color:#E24A68">
        <div class="date">2012</div>
        <div class="title">Title 3</div>
        <div class="descr">Lorem ipsum dolor sit amet consectetur adipisicing elit. Fuga minima consequuntur soluta placeat iure totam commodi repellendus ea delectus, libero fugit quod reprehenderit, sequi quo, et dolorum saepe nulla hic.</div>
    </li>
    <li style="--accent-color:#1B5F8C">
        <div class="date">2017</div>
        <div class="title">Title 4</div>
        <div class="descr">Lorem ipsum dolor, sit amet consectetur adipisicing elit. Impedit, cumque.</div>
    </li>
    <li style="--accent-color:#4CADAD">
        <div class="date">2022</div>
        <div class="title">Title 5</div>
        <div class="descr">Lorem, ipsum dolor sit amet consectetur adipisicing elit. Odit, non.</div>
    </li>
</ul>
		

CSS代码

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root{
    --color: rgba(30, 30, 30);
    --bgColor: rgba(245, 245, 245);
}

.container {
    
    min-height: 100vh;
    display: grid;
    align-content: center;
    gap: 2rem;
    padding: 2rem;
    font-family: "Poppins", sans-serif;
    color: var(--color);
    background: var(--bgColor);
}

h1 {
    text-align: center;
}

.ul {
    --col-gap: 2rem;
    --row-gap: 2rem;
    --line-w: 0.25rem;
    display: grid;
    grid-template-columns: var(--line-w) 1fr;
    grid-auto-columns: max-content;
    column-gap: var(--col-gap);
    list-style: none;
    width: min(60rem, 90%);
    margin-inline: auto;
}

/* line */
.ul::before {
    content: "";
    grid-column: 1;
    grid-row: 1 / span 20;
    background: rgb(225, 225, 225);
    border-radius: calc(var(--line-w) / 2);
}

/* columns*/

/* row gaps */
.ul li:not(:last-child) {
    margin-bottom: var(--row-gap);
}

/* card */
.ul li {
    grid-column: 2;
    --inlineP: 1.5rem;
    margin-inline: var(--inlineP);
    grid-row: span 2;
    display: grid;
    grid-template-rows: min-content min-content min-content;
}

/* date */
.ul li .date {
    --dateH: 3rem;
    height: var(--dateH);
    margin-inline: calc(var(--inlineP) * -1);

    text-align: center;
    background-color: var(--accent-color);

    color: white;
    font-size: 1.25rem;
    font-weight: 700;

    display: grid;
    place-content: center;
    position: relative;

    border-radius: calc(var(--dateH) / 2) 0 0 calc(var(--dateH) / 2);
}

/* date flap */
.ul li .date::before {
    content: "";
    width: var(--inlineP);
    aspect-ratio: 1;
    background: var(--accent-color);
    background-image: linear-gradient(rgba(0, 0, 0, 0.2) 100%, transparent);
    position: absolute;
    top: 100%;

    clip-path: polygon(0 0, 100% 0, 0 100%);
    right: 0;
}

/* circle */
.ul li .date::after {
    content: "";
    position: absolute;
    width: 2rem;
    aspect-ratio: 1;
    background: var(--bgColor);
    border: 0.3rem solid var(--accent-color);
    border-radius: 50%;
    top: 50%;

    transform: translate(50%, -50%);
    right: calc(100% + var(--col-gap) + var(--line-w) / 2);
}

/* title descr */
.ul li .title,
.ul li .descr {
    background: var(--bgColor);
    position: relative;
    padding-inline: 1.5rem;
}

.ul li .title {
    overflow: hidden;
    padding-block-start: 1.5rem;
    padding-block-end: 1rem;
    font-weight: 500;
}

.ul li .descr {
    padding-block-end: 1.5rem;
    font-weight: 300;
}

/* shadows */
.ul li .title::before,
.ul li .descr::before {
    content: "";
    position: absolute;
    width: 90%;
    height: 0.5rem;
    background: rgba(0, 0, 0, 0.5);
    left: 50%;
    border-radius: 50%;
    filter: blur(4px);
    transform: translate(-50%, 50%);
}

.ul li .title::before {
    bottom: calc(100% + 0.125rem);
}

.ul li .descr::before {
    z-index: -1;
    bottom: 0.25rem;
}

@media (min-width: 40rem) {
    .ul {
        grid-template-columns: 1fr var(--line-w) 1fr;
    }

    .ul::before {
        grid-column: 2;
    }

    .ul li:nth-child(odd) {
        grid-column: 1;
    }

    .ul li:nth-child(even) {
        grid-column: 3;
    }

    /* start second card */
    .ul li:nth-child(2) {
        grid-row: 2/4;
    }

    .ul li:nth-child(odd) .date::before {
        clip-path: polygon(0 0, 100% 0, 100% 100%);
        left: 0;
    }

    .ul li:nth-child(odd) .date::after {
        transform: translate(-50%, -50%);
        left: calc(100% + var(--col-gap) + var(--line-w) / 2);
    }

    .ul li:nth-child(odd) .date {
        border-radius: 0 calc(var(--dateH) / 2) calc(var(--dateH) / 2) 0;
    }
}
		

codepen网址：https://codepen.io/MarkBoots/pen/OJOqNyB