koa3-demo/public/css/page/index.css

.home-hero {
    margin: 40px 20px 40px;
    /* background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px); */
    text-align: center;
}
.avatar-container {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    position: relative;
}
.avatar-container .author {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 20px;
    font-weight: bold;
}
.avatar-container:hover .avatar {
    transform: rotate(360deg);
    left: 100%;
}
.avatar {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    cursor: pointer;
    left: 0;
    transform-origin: center center;
    transition: 0.5s transform ease-in-out, 0.5s left ease-in-out;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    border-radius: 8px;
    padding: 20px;
    width: 300px;
    margin: 0 auto;
    margin-bottom: 40px;
    text-align: center;
}

.time-line {
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.time-line:before {
    content: "";
    width: 3px;
    height: 100%;
    background: rgba(255, 255, 255, 0.37);
    backdrop-filter: blur(12px);
    left: 50%;
    top: 0;
    position: absolute;
    transform: translateX(-50%);
}

.time-line::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 100%;
    width: 0;
    height: 0;
    border-top: 12px solid rgba(255, 255, 255, 0.37);
    border-right: 7px solid transparent;
    border-left: 7px solid transparent;
    backdrop-filter: blur(12px);
    transform: translateX(-50%);
}

.time-line a {
    color: rgb(219, 255, 121);
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.2s, background 0.2s;
    border-radius: 8px;
    padding: 1px 4px;
}
.time-line a:hover {
    color: #fff;
    background: linear-gradient(90deg, #7ec6f7 0%, #ff8ca8 100%);
    text-decoration: none;
}

.time-line-item {
    color: white;
    width: 900px;
    margin: 20px auto;
    position: relative;
}

.time-line-item:first-child {
    margin-top: 0;
}

.time-line-item:last-child {
    margin-bottom: 50px;
}

.timeline-icon {
    position: absolute;
    width: 100px;
    height: 50px;
    background-color: #ee4d4d7a;
    backdrop-filter: blur(12px);
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: Arial, Helvetica, sans-serif;
}

.time-line-item-title {
    background-color: #ee4d4d7a;
    backdrop-filter: blur(12px);
    height: 50px;
    line-height: 50px;
    padding: 0 20px;
}

.time-line-item:nth-child(odd) .time-line-item-content {
    color: white;
    width: 50%;
    padding-right: 80px;
}

.time-line-item:nth-child(odd) .time-line-item-content::before {
    content: "";
    position: absolute;
    left: calc(50% - 80px);
    top: 20px;
    width: 0;
    height: 0;
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
    border-left: 7px solid #ee4d4d7a;
    backdrop-filter: blur(12px);
}

.time-line-item:nth-child(even) .time-line-item-content {
    float: right;
    width: 50%;
    padding-left: 80px;
}

.time-line-item:nth-child(even) .time-line-item-content::before {
    content: "";
    position: absolute;
    right: calc(50% - 80px);
    top: 20px;
    width: 0;
    height: 0;
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
    border-right: 7px solid #ee4d4d7a;
    backdrop-filter: blur(12px);
}

.time-line-item-desc {
    background-color: #ffffff54;
    backdrop-filter: blur(12px);
    color: #fff;
    padding: 20px;
    line-height: 1.4;
}

@media screen and (max-width: 768px) {
    .home-hero {
        margin: 0;
        margin-top: 20px;
    }
}