/* 相册详情页面特定样式 - 蓝白配色体系 */
:root {
    --primary-blue: #1e40af;
    --secondary-blue: #3b82f6;
    --light-blue: #dbeafe;
    --accent-blue: #60a5fa;
    --white: #ffffff;
    --light-gray: #f8fafc;
    --medium-gray: #e2e8f0;
    --dark-gray: #475569;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --border-radius-lg: 20px;
}

body { 
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif; 
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%); 
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
}

.container { 
    max-width: 1400px; 
    margin: 0 auto; 
    padding: 30px 20px; 
}

.header { margin-bottom: 40px; }
.back-link { 
    display: inline-flex; 
    align-items: center; 
    gap: 10px; 
    padding: 12px 24px; 
    background: var(--white); 
    color: var(--primary-blue); 
    text-decoration: none; 
    border-radius: var(--border-radius); 
    box-shadow: var(--shadow-sm);
    margin-bottom: 25px;
    transition: all 0.3s ease;
    border: 1px solid var(--medium-gray);
    font-weight: 500;
}
.back-link:hover { 
    background: var(--light-blue);
    transform: translateX(-5px);
    box-shadow: var(--shadow-md);
    color: var(--primary-blue);
}
.album-title { 
    color: var(--text-dark); 
    font-size: 2.5rem; 
    text-align: center; 
    margin-bottom: 15px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.album-info { 
    text-align: center; 
    color: var(--text-light); 
    font-size: 1.2rem;
    margin-bottom: 40px;
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--medium-gray);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.images-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); 
    gap: 25px; 
    margin-bottom: 50px;
}
.image-item { 
    position: relative; 
    overflow: hidden; 
    border-radius: var(--border-radius); 
    box-shadow: var(--shadow-lg);
    background: var(--white);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid var(--medium-gray);
}
.image-item:hover { 
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-blue);
}
.image-item img { 
    width: 100%; 
    height: 220px; 
    object-fit: cover; 
    display: block;
    transition: transform 0.5s ease;
}
.image-item:hover img { 
    transform: scale(1.05);
}
.image-caption { 
    padding: 12px; 
    text-align: center; 
    color: var(--text-dark);
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.4;
}

/* 图片查看器样式 */
.lightbox { 
    display: none; 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background: rgba(30, 41, 59, 0.95); 
    z-index: 1000; 
    justify-content: center; 
    align-items: center;
    flex-direction: column;
    backdrop-filter: blur(10px);
}
.lightbox img { 
    max-width: 85%; 
    max-height: 75%; 
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
.lightbox-close { 
    position: absolute; 
    top: 30px; 
    right: 40px; 
    color: var(--white); 
    font-size: 36px; 
    cursor: pointer;
    z-index: 1001;
    background: rgba(255, 255, 255, 0.1);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}
.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}
.lightbox-nav { 
    position: absolute; 
    top: 50%; 
    width: 100%; 
    display: flex; 
    justify-content: space-between; 
    padding: 0 20px;
    transform: translateY(-50%);
    z-index: 1001;
}
.lightbox-nav button { 
    background: rgba(255,255,255,0.2);
    color: var(--white);
    font-size: 30px; 
    padding: 12px 24px; 
    cursor: pointer; 
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.lightbox-nav button:hover { 
    background: rgba(255,255,255,0.3);
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.3);
}
.lightbox-info { 
    color: var(--white); 
    text-align: center; 
    margin-top: 25px;
    font-size: 1.2rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 15px 25px;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

@media (max-width: 768px) {
    .images-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
    .album-title { font-size: 1.8rem; }
    .lightbox img { max-width: 95%; max-height: 60%; }
    .lightbox-nav button { font-size: 24px; padding: 10px 18px; }
    .container { padding: 20px 15px; }
    .album-info { font-size: 1.1rem; padding: 15px; }
}