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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color, #333);
    background-color: var(--background-color, #fff);
    padding-bottom: 60px;
}

header {
    background: var(--header-bg, #4CAF50);
    color: white;
    text-align: center;
    padding: 1rem;
}

h1 {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    margin-bottom: 0.5rem;
}

nav ul {
    list-style: none;
    padding: 0.5rem 0;
}

nav ul li {
    display: inline-block;
    margin: 0.5rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.1);
    transition: background-color 0.3s;
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    width: 100%;
}

section {
    margin-bottom: 2rem;
}

h2 {
    color: var(--primary-color, #4CAF50);
    margin-bottom: 1rem;
    font-size: clamp(1.2rem, 4vw, 1.8rem);
}

.student-info {
    background-color: var(--card-bg, #f5f5f5);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.info-item {
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.info-item label {
    font-weight: bold;
    margin-right: 1rem;
    min-width: 60px;
}

.photo-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    padding: 0.5rem;
}

.photo-gallery img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

@media (hover: hover) {
    .photo-gallery img:hover {
        transform: scale(1.05);
    }
}

.photo-gallery img.enlarged {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1.5);
    max-width: 90vw;
    max-height: 90vh;
    z-index: 1000;
    object-fit: contain;
    background-color: rgba(0,0,0,0.8);
    padding: 1rem;
}

footer {
    text-align: center;
    padding: 1rem;
    background: var(--header-bg, #4CAF50);
    color: white;
    position: fixed;
    bottom: 0;
    width: 100%;
    font-size: 0.9rem;
}

@media screen and (max-width: 768px) {
    .student-info {
        padding: 0.8rem;
    }

    .info-item {
        margin-bottom: 0.8rem;
    }

    .info-item label {
        margin-bottom: 0.2rem;
        width: 100%;
    }

    .photo-gallery {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 0.8rem;
    }

    .photo-gallery img.enlarged {
        transform: translate(-50%, -50%) scale(1.2);
    }
}

@media screen and (max-width: 480px) {
    header {
        padding: 0.8rem;
    }

    main {
        padding: 0.8rem;
    }

    .photo-gallery {
        grid-template-columns: 1fr;
    }

    nav ul li {
        margin: 0.3rem;
    }

    nav ul li a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }

    .student-info {
        background-color: #2d2d2d;
    }

    h2 {
        color: #6ece71;
    }

    header, footer {
        background-color: #2d6930;
    }
}

.error {
    color: #721c24;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
    margin: 1rem 0;
}

@media (prefers-color-scheme: dark) {
    .error {
        color: #f8d7da;
        background-color: #721c24;
        border-color: #9c2632;
    }
}