/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根样式变量 */
:root {
    --primary-color: #333;
    --secondary-color: #999;
    --background-color: #fefefe;
    --border-color: #eee;
    --text-light: #666;
    --font-family: "Helvetica Neue", Arial, sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --border-radius: 0.25rem;
    --transition-speed: 0.3s;
}

/* 基础样式 */
body {
    font-family: var(--font-family);
    color: var(--primary-color);
    line-height: 1.6;
    background-color: var(--background-color);
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed) ease;
}

/* 导航栏 */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 5%;
    display: flex;
    justify-content: center;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
    padding: 0;
    margin: 0;
}

nav a {
    font-weight: 300;
    letter-spacing: 0.1em;
}

nav a:hover {
    color: var(--secondary-color);
}

/* 主容器 */
.container {
    padding: var(--spacing-xl) 10%;
    max-width: 1400px;
    margin: 0 auto;
}

/* 章节标题 */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.5em;
    text-transform: uppercase;
}

/* 英雄区域 */
.hero {
    height: 100vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 300;
    letter-spacing: 0.2em;
    padding: var(--spacing-md);
    position: relative;
    z-index: 2;
    background-color: rgba(0, 0, 0, 0.3);
}

/* 网格布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.grid-item {
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.grid-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.grid-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-speed) ease;
    aspect-ratio: 4/5;
    object-fit: cover;
}

.grid-item:hover img {
    transform: scale(1.05);
}

/* 图片说明 */
.item-caption {
    padding: var(--spacing-sm) 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 300;
}

/* 系列卡片 */
.series-card {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    cursor: pointer;
    height: 400px;
}

.series-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-speed) ease;
}

.series-card:hover img {
    transform: scale(1.08);
}

.series-card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
    padding: var(--spacing-md);
    transform: translateY(20px);
    transition: transform var(--transition-speed) ease;
}

.series-card:hover .series-card-content {
    transform: translateY(0);
}

.series-card h3 {
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.series-card p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 理念页面 */
.philosophy {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
    text-align: justify;
    color: var(--primary-color);
}

.philosophy p {
    margin-bottom: var(--spacing-md);
    text-indent: 2em;
}

/* 页脚 */
footer {
    text-align: center;
    padding: var(--spacing-md);
    color: var(--secondary-color);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md) 5%;
    }
    
    nav ul {
        gap: var(--spacing-md);
    }
    
    nav a {
        font-size: 0.9rem;
    }
    
    .hero h1 {
        font-size: 1.8rem;
        letter-spacing: 0.1em;
        padding: var(--spacing-sm);
    }
    
    .grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .section-title {
        font-size: 1.2rem;
        letter-spacing: 0.3em;
    }
    
    .philosophy {
        font-size: 1rem;
    }
    
    .philosophy p {
        text-indent: 1.5em;
    }
}

@media (max-width: 480px) {
    nav ul {
        gap: var(--spacing-sm);
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .series-card {
        height: 300px;
    }
}

/* 加载动画 */
.fade-in {
    animation: fadeIn 0.8s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}