/* --- 基础设置 --- */
:root {
    --bg-color: #1a1a1a;       /* 深灰背景 */
    --text-color: #f0f0f0;     /* 浅白文字 */
    --accent-color: #888;      /* 辅助色 */
    --gap: 20px;               /* 间距 */
}

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

body {
    font-family: 'Work Sans', 'Noto Serif SC', sans-serif; /* 衬线体与无衬线体混排 */
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* --- 头部设计 --- */
.header {
    padding: 80px 20px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.header h1 {
    font-size: 2.5rem;
    letter-spacing: 2px;
    margin-bottom: 10px;
    font-weight: 300;
}

.bio {
    color: var(--accent-color);
    margin-bottom: 30px;
    font-family: 'Noto Serif SC', serif;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    text-decoration: none;
    color: var(--text-color);
    border: 1px solid var(--accent-color);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
}

/* --- 瀑布流画廊 (核心部分) --- */
.gallery-container {
    padding: 0 20px 60px;
    max-width: 1400px;
    margin: 0 auto;
}

.masonry-grid {
    column-count: 3; /* 默认3列 */
    column-gap: var(--gap);
}

.gallery-item {
    break-inside: avoid; /* 防止图片被切断 */
    margin-bottom: var(--gap);
    position: relative;
    cursor: zoom-in;
    overflow: hidden;
    border-radius: 4px;
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

/* 悬停效果 */
.gallery-item:hover img {
    transform: scale(1.03); /* 轻微放大 */
}

.overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none; /* 让点击穿透到图片 */
}

.gallery-item:hover .overlay {
    opacity: 1;
}

.overlay h3 {
    font-size: 1rem;
    font-weight: 500;
}

.overlay p {
    font-size: 0.8rem;
    color: #ccc;
}

/* --- 响应式调整 --- */
@media (max-width: 1024px) {
    .masonry-grid { column-count: 2; }
}

@media (max-width: 600px) {
    .masonry-grid { column-count: 1; }
    .header h1 { font-size: 2rem; }
}

/* --- 底部 --- */
footer {
    text-align: center;
    padding: 40px;
    font-size: 0.8rem;
    color: var(--accent-color);
    border-top: 1px solid #333;
}

/* --- 灯箱 (大图查看模式) --- */
.lightbox {
    display: none; /* 默认隐藏 */
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.95);
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.lightbox-content {
    max-width: 90%;
    max-height: 85vh;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    animation: zoomIn 0.3s;
}

#caption {
    margin-top: 20px;
    color: #ccc;
    font-family: 'Noto Serif SC', serif;
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.close-btn:hover { color: #bbb; }

@keyframes zoomIn {
    from {transform:scale(0.9); opacity:0}
    to {transform:scale(1); opacity:1}
}