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

/* 设计令牌 - 颜色 */
:root {
    --color-primary: #8B7355;
    --color-secondary: #D2B48C;
    --color-background: #FAF8F5;
    --color-surface: #F5F2ED;
    --color-text: #3A3A3A;
    --color-text-light: #6B6B6B;
    --color-border: #E8E4DC;
}

/* 设计令牌 - 间距 */
:root {
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
}

/* 设计令牌 - 字体 */
:root {
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(250, 248, 245, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-text);
    margin: 3px 0;
    transition: 0.3s;
}

/* 主内容区域 */
main {
    margin-top: 60px;
    min-height: calc(100vh - 60px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 首页样式 */
.hero-section {
    height: calc(100vh - 60px);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.2), rgba(0,0,0,0.4));
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    padding: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    letter-spacing: 2px;
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: transparent;
    color: white;
    border: 1px solid white;
    text-decoration: none;
    border-radius: 2px;
    transition: all 0.3s ease;
    font-weight: 500;
}

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

/* 网格布局 */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-2-responsive {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-cols-3-responsive {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* 卡片样式 */
.card {
    background-color: var(--color-surface);
    border-radius: 4px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.card-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.card-content {
    padding: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.card-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* 页面标题 */
.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    text-align: center;
    margin: var(--spacing-xl) 0;
    color: var(--color-text);
    letter-spacing: 1px;
}

/* 图文区块 */
.content-block {
    margin-bottom: var(--spacing-xl);
}

.content-block-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 4px;
}

.content-block-text {
    padding: var(--spacing-md) 0;
}

/* 页脚 */
footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: var(--color-background);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }
    
    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .grid-cols-3 {
        grid-template-columns: 1fr;
    }
    
    .card-image {
        height: 200px;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--color-secondary);
    border-radius: 4px;
}

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