/* --- 全局和基础样式 (与首页同步) --- */
:root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --subtle-text-color: #a0a0a0;
    --border-color: #333;
}

body {
    background-color: var(--bg-color);
    margin: 0;
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    
    /* --- 精致化的脚印背景 (与首页同步) --- */
    background-image:
        radial-gradient(ellipse 40% 60% at 30% 40%, #222 15%, transparent 15.5%),
        radial-gradient(circle at 20% 15%, #222 4%, transparent 4.5%),
        radial-gradient(circle at 28% 10%, #222 3%, transparent 3.5%),
        radial-gradient(circle at 38% 9%, #222 2.5%, transparent 3%),
        radial-gradient(circle at 48% 11%, #222 2%, transparent 2.5%),
        radial-gradient(circle at 56% 15%, #222 1.5%, transparent 2%),
        radial-gradient(ellipse 40% 60% at 80% 70%, #222 15%, transparent 15.5%),
        radial-gradient(circle at 90% 85%, #222 4%, transparent 4.5%),
        radial-gradient(circle at 82% 90%, #222 3%, transparent 3.5%),
        radial-gradient(circle at 72% 91%, #222 2.5%, transparent 3%),
        radial-gradient(circle at 62% 89%, #222 2%, transparent 2.5%),
        radial-gradient(circle at 54% 85%, #222 1.5%, transparent 2%);
    background-size: 500px 500px;
    
    /* 使用 flex 布局实现垂直居中 */
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 40px 0; /* 给上下一些空间 */
    box-sizing: border-box;
}

/* --- 详情页主容器 --- */
.detail-container {
    width: 90%;
    max-width: 1400px; /* 图片的最大宽度 */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px; /* 图片和返回链接的间距 */
    position: relative;
}

/* --- 图片展示区域 --- */
.image-display {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

#detail-image {
    display: block;
    width: 100%;
    height: auto;
}

/* --- 精致的返回链接 --- */
.back-home-link {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 1.1rem;
    text-decoration: none;
    color: var(--subtle-text-color);
    padding: 10px 20px;
    border: 1px solid transparent;
    border-radius: 25px;
    transition: all 0.3s ease;
    
    /* 定位在左上角 */
    position: fixed;
    top: 30px;
    left: 30px;
    background-color: rgba(26, 26, 26, 0.7);
    backdrop-filter: blur(8px);
}

.back-home-link:hover {
    color: #fff;
    border-color: var(--border-color);
    background-color: rgba(40, 40, 40, 0.7);
}

/* 移动端优化 */
@media (max-width: 768px) {
    .back-home-link {
        top: 20px;
        left: 20px;
        font-size: 0.9rem;
        padding: 8px 16px;
    }

    .detail-container {
        width: 95%;
    }
}