* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow-x: hidden;
    transition: all 0.3s ease;
}

/* 暗色主题 */
body.dark {
    color: #e2e8f0;
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: white;
    font-weight: 500;
}

.theme-toggle:hover {
    background: rgba(0, 0, 0, 0.5);
    transform: translateY(-2px);
}

.dark .theme-toggle {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.4);
}

.theme-toggle .icon {
    font-size: 16px;
    transition: transform 0.3s ease;
}

.theme-toggle.rotating .icon {
    transform: rotate(360deg);
}

.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: background 0.3s ease;
}

.dark .hero {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

.dark .hero::before {
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-title {
    font-size: clamp(4rem, 15vw, 12rem);
    font-weight: 900;
    color: white;
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-shadow: 0 10px 30px rgba(0,0,0,0.3);
    animation: glow 3s ease-in-out infinite alternate;
    position: relative;
    z-index: 2;
}

@keyframes glow {
    from { text-shadow: 0 0 20px rgba(255,255,255,0.5), 0 0 30px rgba(255,255,255,0.3); }
    to { text-shadow: 0 0 40px rgba(255,255,255,0.8), 0 0 60px rgba(255,255,255,0.4); }
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 3rem;
    position: relative;
    z-index: 2;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    animation: bounce 2s infinite;
    font-size: 2rem;
    cursor: pointer;
    z-index: 2;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.section {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    background: #d4d4d4;
    position: relative;
    transition: background 0.3s ease, color 0.3s ease;
}

.dark .section {
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);;
    color: #e2e8f0;
}

.intro-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    text-align: center;
    border-radius: 20px 20px 0 0;
    margin-top: -50px;
    position: relative;
    z-index: 3;
    transition: background 0.3s ease;
}

.dark .intro-section {
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #2d3748;
    position: relative;
    transition: color 0.3s ease;
}

.dark .section-title {
    color: #e2e8f0;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.dark .section-title::after {
    background: linear-gradient(90deg, #63b3ed, #90cdf4);
}

.intro-text {
    font-size: 1.2rem;
    color: #4a5568;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    transition: color 0.3s ease;
}

.dark .intro-text {
    color: #cbd5e0;
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.member-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
}

.dark .member-card {
    background: #2d3748;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
}

.member-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.dark .member-card::before {
    background: linear-gradient(90deg, #63b3ed, #90cdf4);
}

.member-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.dark .member-card:hover {
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.member-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    border: 4px solid #667eea;
    transition: transform 0.3s ease;
}

.dark .member-avatar {
    border: 4px solid #63b3ed;
}

.member-card:hover .member-avatar {
    transform: scale(1.1);
}

.member-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.dark .member-name {
    color: #e2e8f0;
}

.member-website {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 1rem;
    display: inline-block;
    transition: color 0.3s ease;
}

.dark .member-website {
    color: #63b3ed;
}

.member-website:hover {
    color: #764ba2;
}

.dark .member-website:hover {
    color: #90cdf4;
}

.member-skills {
    background: #f7fafc;
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    border-left: 4px solid #667eea;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.dark .member-skills {
    background: #4a5568;
    border-left: 4px solid #63b3ed;
}

.member-skills h4 {
    color: #2d3748;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.dark .member-skills h4 {
    color: #e2e8f0;
}

.member-bio {
    color: #4a5568;
    line-height: 1.6;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.dark .member-bio {
    color: #cbd5e0;
}

.projects-section {
    background: #d4d4d4; /* 或 #ffffff */
    color: black; /* 白底黑字 */
    text-align: center;
    transition: background 0.3s ease;
}

.dark .projects-section {
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
}

.projects-section .section-title {
    color: black;
}

.dark .projects-section .section-title {
    color: white;
}

.projects-section .section-title::after {
    background: linear-gradient(90deg, #63b3ed, #90cdf4);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: #f3f4f6; /* 淡灰色，接近 Tailwind 的 gray-100 */
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid #e5e7eb; /* 更浅的灰边框 */
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}


.dark .project-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
}

.project-card:hover {
    transform: translateY(-5px);
    background: #e5e7eb; /* hover 时再浅一点，形成反馈 */
    color: inherit;
}

.dark .project-card:hover {
    background: rgba(255,255,255,0.1);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer {
    background: #1a202c;
    color: white;
    text-align: center;
    padding: 2rem;
    font-size: 1rem;
    transition: background 0.3s ease;
}

.dark .footer {
    background: #0d1117;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 4rem;
    }
    
    .section {
        padding: 3rem 1rem;
    }
    
    .members-grid {
        grid-template-columns: 1fr;
    }
    
    .member-card {
        padding: 1.5rem;
    }

    .theme-toggle {
        top: 20px;
        right: 20px;
        padding: 10px 16px;
        font-size: 12px;
    }
}

.glassmorphism {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.dark .glassmorphism {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.contact-section {
    background: #d4d4d4;
    text-align: center;
    transition: background 0.3s ease;
}

.dark .contact-section {
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
}

.contact-content p {
    font-size: 1.1rem;
    margin: 1rem 0;
    color: #4a5568;
    transition: color 0.3s ease;
}

.dark .contact-content p {
    color: #cbd5e0;
}

.contact-content a {
    color: #667eea;
    text-decoration: none;
}

.dark .contact-content a {
    color: #63b3ed;
}

.contact-content a:hover {
    text-decoration: underline;
}

.github-corner {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}
.contact-section {
    border-radius: 0 !important;
}