/* 首页专用样式 */
/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    width: 95%;
    margin: 0 auto;
    padding: 0;
}

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    width: 95%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: #000;
    font-weight: 700;
    font-size: 2rem;
    text-transform: uppercase;
    position: relative;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.nav-logo h2::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #000;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: #000;
    font-weight: 500;
    padding: 10px 0;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
    text-transform: uppercase;
    font-size: 1rem;
    letter-spacing: 0.5px;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

.nav-link.active {
    border-bottom: 2px solid #000;
}

.nav-link:hover {
    color: #666;
}

.search-icon {
    font-size: 1.1rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 10px 0;
    min-width: 250px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: #333;
    text-decoration: none;
    transition: background-color 0.3s ease;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

.dropdown-menu li a:hover {
    background-color: #f8f9fa;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域 */
.hero {
    height: 600px;
    position: relative;
    overflow: hidden;
}

.hero-slider {
    width: 100%;
    height: 100%;
    position: relative;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.hero-slide.active {
    opacity: 1;
}

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

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.hero-navigation {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 10;
}

.hero-nav-btn {
    background: rgba(255, 255, 255, 0.8);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.hero-nav-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
}

.hero-pagination {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.pagination-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.pagination-dot.active {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.2);
}

/* 实验室介绍 */
.lab-intro {
    padding: 80px 0;
    background: #f8f9fa;
}

.lab-intro h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    font-family: 'Georgia', 'Times New Roman', serif;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.lab-intro h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #333;
}

.lab-intro p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 30px;
    text-align: justify;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

.lab-intro ul {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.lab-intro li {
    padding: 10px 0;
    position: relative;
    padding-left: 30px;
    font-size: 1.1rem;
    color: #555;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

.lab-intro li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: #333;
    font-weight: bold;
}

/* 最近项目 */
.recent-projects {
    padding: 80px 0;
}

.recent-projects h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 50px;
    text-align: center;
    position: relative;
    font-family: 'Georgia', 'Times New Roman', serif;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.recent-projects h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #333;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.project-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: 25px;
}

.project-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.project-content p {
    color: #666;
    line-height: 1.6;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 40px 0;
    margin-top: 80px;
}

.footer p {
    font-size: 1rem;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero {
        height: 400px;
    }

    .hero-navigation {
        display: none;
    }

    .lab-intro h2,
    .recent-projects h2 {
        font-size: 2rem;
    }

    .lab-intro p,
    .lab-intro li {
        font-size: 1rem;
    }

    .project-content h3 {
        font-size: 1.2rem;
    }

    .project-content p {
        font-size: 0.9rem;
    }

    .project-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        width: 95%;
    }

    .nav-container {
        width: 95%;
    }

    .hero {
        height: 300px;
    }

    .lab-intro h2,
    .recent-projects h2 {
        font-size: 1.8rem;
    }

    .lab-intro p,
    .lab-intro li {
        font-size: 0.9rem;
    }

    .project-content h3 {
        font-size: 1.1rem;
    }

    .project-content p {
        font-size: 0.85rem;
    }

    .project-content {
        padding: 20px;
    }
}