:root {
    --primary-color: #E53935;
    --secondary-color: #FFC107;
    --text-color: #333333;
    --background-color: #F5F5F5;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
    padding: 1rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}


nav ul {
    display: flex;
    justify-content: center;
    list-style-type: none;
    padding: 0;
    margin-top: 0.1rem;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition: color 0.3s ease;
    font-size: 1.5rem;
}

nav ul li a:hover {
    color: var(--secondary-color);
}
.text-content a {
    color: inherit; /* 继承父元素的颜色 */
    text-decoration: none; /* 去掉下划线 */
}

.text-content a:hover {
    text-decoration: underline; /* 鼠标悬停时显示下划线 */
}

#home {
    height: 95vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0rem;
}

.container {
    position: relative;
    width: 90vw;
    height: 90vh;
    background: #f5f5f5;
    box-shadow: 0 20px 20px #dbdbdb;
}

.container .slide .item {
    width: 20%;
    height: 50%;
    position: absolute;
    top: 50%;
    transform: translate(0, -50%);
    border-radius: 20px;
    box-shadow: 0 30px 30px #505050;
    background-position: 50% 50%;
    background-size: cover;
    display: inline-block;
    transition: 0.5s;
}

.slide .item:nth-child(1),
.slide .item:nth-child(2) {
    top: 0;
    left: 0;
    transform: translate(0, 0);
    border-radius: 0;
    width: 100%;
    height: 100%;
}

.slide .item:nth-child(3) {
    left: 50%;
}

.slide .item:nth-child(4) {
    left: calc(50% + 220px);
}

.slide .item:nth-child(5) {
    left: calc(50% + 440px);
}

.slide .item:nth-child(n+6) {
    left: calc(50% + 660px);
    opacity: 0;
}

.item .content {
    position: absolute;
    top: 50%;
    left: 100px;
    width: 300px;
    text-align: left;
    color: #eee;
    transform: translate(0, -50%);
    font-family: system-ui;
    display: none;
}

.slide .item:nth-child(2) .content {
    display: block;
}

.content .name {
    font-size: 80px;
    text-transform: uppercase;
    font-weight: bold;
    opacity: 0;
    animation: animate 1s ease-in-out 1 forwards;
    white-space: nowrap;
}

.content .des {
    font-size: 40px;
    width: 600px;
    margin-top: 10px;
    margin-bottom: 20px;
    opacity: 0;
    animation: animate 1s ease-in-out 0.3s 1 forwards;
}

.content button {
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    opacity: 0;
    animation: animate 1s ease-in-out 0.6s 1 forwards;
}

@keyframes animate {
    from {
        opacity: 0;
        transform: translate(0, 100px);
        filter: blur(33px);
    }
    to {
        opacity: 1;
        transform: translate(0);
        filter: blur(0);
    }
}

.button {
    width: 100%;
    text-align: center;
    position: absolute;
    bottom: 20px;
}

.button button {
    width: 40px;
    height: 35px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    margin: 0 5px;
    border: 1px solid #000;
    transition: 0.3s;
}

.button button:hover {
    background: #ababab;
    color: #fff;
}

.gallery-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.research-item {
    display: flex;
    margin-bottom: 4rem;
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.research-item:hover {
    transform: translateY(-5px);
}

.image-container {
    flex: 1;
    position: relative;
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.5rem;
    margin: 0;
    text-align: center;
    font-size: 0.9rem;
}

.text-content {
    flex: 1;
    padding: 2rem;
}

h3 {
    color: var(--primary-color);
    margin-top: 0;
}

.back-button {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.back-button:hover {
    background-color: #C62828;
}

@media (max-width: 768px) {
    .research-item {
        flex-direction: column;
    }

    .image-container, .text-content {
        flex: auto;
    }

    .image-container img {
        height: 300px;
    }
}