* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans SC', 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #f72585;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --dark-bg: #1a1a2e;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 导航栏样式 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(26, 26, 46, 0.95);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(67, 97, 238, 0.3);
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: white;
    letter-spacing: 1px;
}

.logo-text span {
    color: white;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: white;
    font-weight: 600;
    font-size: 18px;
    padding: 8px 5px;
    position: relative;
    transition: var(--transition);
}

nav a:hover {
    color: var(--primary-color);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--accent-color);
    transition: var(--transition);
    border-radius: 2px;
}

nav a:hover::after {
    width: 100%;
}

/* 主内容区域 */
section {
    padding: 100px 5% 80px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* 首页英雄区域 */
#home {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1511379938547-c1f69419868d?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    text-align: center;
    color: white;
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out;
}

.hero-logo {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.logo-image {
    width: 100%; /* 根据实际情况调整大小 */
    height: 100%;
    object-fit: contain; /* 保持图片比例 */
    border-radius: 50%; /* 如果需要图片本身也是圆形 */
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 10px;
    font-weight: 800;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-tagline {
    font-size: 24px;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 1px;
}

.hero-subtitle {
    font-size: 22px;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

.hero-tagline {
    font-size: 24px;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 1px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

.btn {
    padding: 15px 35px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    letter-spacing: 1px;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
    box-shadow: 0 5px 15px rgba(247, 37, 133, 0.4);
}

.btn-primary:hover {
    background-color: #e11570;
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(247, 37, 133, 0.5);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

/* 社团简介 */
#about {
    background-color: white;
}

.section-title {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 18px;
    color: #666;
    margin-bottom: 50px;
    max-width: 700px;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
    min-width: 300px;
    font-size: 18px;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: 25px;
}

.image-grid {
    flex: 1;
    min-width: 300px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 20px;
}

.grid-item {
    border-radius: 10px;
    overflow: hidden;
    height: 200px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.grid-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.grid-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 核心成员 */
#members {
    background-color: var(--light-bg);
    position: relative;
    overflow: hidden;
}

.members-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    overflow: hidden; /* 添加这一行，防止内容溢出 */
}

.members-slider {
    display: flex;
    transition: transform 0.5s ease;
    position: relative;
    height: 600px;
    border-radius: 15px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.member-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 40px;
    color: white;
    background-size: cover;
    background-position: center;
}

.member-slide:nth-child(1) {
    background-image: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1516280440614-37939bbacd81?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
}

.member-slide:nth-child(2) {
    background-image: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1511671782779-c97d3d27a1d4?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
}

.member-slide:nth-child(3) {
    background-image: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1493225457124-a3eb161ffa5f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
}

.member-slide:nth-child(4) {
    background-image: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1525201548942-d8732f6617a0?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
}

.member-slide:nth-child(5) {
    background-image: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1510915361894-db8b60106cb1?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
}

.member-info {
    max-width: 600px;
    background: rgba(0, 0, 0, 0.7);
    padding: 30px;
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

.member-name {
    font-size: 32px;
    margin-bottom: 10px;
    color: white;
}

.member-role {
    font-size: 20px;
    color: var(--accent-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.member-desc {
    font-size: 16px;
    line-height: 1.7;
    opacity: 0.9;
}

.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    gap: 20px;
}

.slider-btn {
    background-color: rgba(255, 255, 255, 0.9);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-btn:hover {
    background-color: white;
    transform: scale(1.1);
}

.slider-dots {
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

/* 艺演活动 */
#activities {
    background-color: white;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 50px auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 30px;
    position: relative;
    margin: 40px 0;
    width: 50%;
    align-items: center;
}

.timeline-item:nth-child(even) {
    align-self: flex-end;
    justify-content: flex-start;
    padding-left: 30px;
    padding-right: 0;
    left: 50%;
}

.timeline-content {
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    position: relative;
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.timeline-item:nth-child(even) .timeline-content::before {
    content: '';
    position: absolute;
    right: -10px;
    top: 20px;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-left: 10px solid white;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 20px;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 10px solid white;
}

.timeline-date {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 25px;
}

.timeline-title {
    font-size: 22px;
    margin-bottom: 4px;
    color: var(--secondary-color);
}

.timeline-desc {
    color: #666;
    line-height: 1.7;
    margin-bottom: 10px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: white;
    border: 4px solid var(--accent-color);
    border-radius: 50%;
    top: 20px;
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    left: -10px;
    right: auto;
}

/* 加入我们 */
#join {
    background-color: var(--light-bg);
}

.join-content {
    max-width: 800px;
    margin: 0 auto;
}

.join-text {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 30px;
    text-align: left;
}

.join-text p {
    margin-bottom: 20px;
}

.requirements {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    text-align: left;
    margin-top: 30px;
}

.requirements h3 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 24px;
}

.requirements ul {
    padding-left: 20px;
    margin-bottom: 20px;
}

.requirements li {
    margin-bottom: 10px;
    position: relative;
}

.requirements li::before {
    content: '♪';
    color: var(--accent-color);
    font-weight: bold;
    position: absolute;
    left: -20px;
}

/* 页脚 */
footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 40px 5% 30px;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-copyright {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-copyright a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-copyright a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .nav-container {
        flex-direction: column;
        padding: 15px;
    }
    
    nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 0;
        justify-content: flex-start;
    }
    
    .timeline-item:nth-child(even) {
        left: 0;
        padding-left: 50px;
    }
    
    .timeline-item::after {
        left: 10px;
        right: auto;
    }
    
    .timeline-item:nth-child(even)::after {
        left: 10px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .member-slide {
        padding: 20px;
    }
    .members-slider {
        height: 500px;
    }
    
    .member-slide {
        padding: 20px;
    }
    
    .member-info {
        padding: 20px;
    }
    
    .member-name {
        font-size: 24px;
    }
    
    .member-role {
        font-size: 18px;
    }

    
    .member-name {
        font-size: 28px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}