/* 
 * 全局样式表 - 现代男性时尚网站
 * 风格：简约现代、深色系、中性色调
 * 布局：Flexbox & Grid
 */

:root {
    /* 颜色变量 - 深色系与中性色调 */
    --bg-primary: #121212;      /* 深邃背景 */
    --bg-secondary: #1e1e1e;    /* 次级背景 */
    --text-primary: #f5f5f5;    /* 主要文字 */
    --text-secondary: #a0a0a0;  /* 次要文字 */
    --accent-color: #ffffff;    /* 强调色 */
    --border-color: #333333;    /* 边框颜色 */
    
    /* 间距变量 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 字体变量 */
    --font-family-base: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    
    /* 过渡效果 */
    --transition-fast: 0.3s ease;
    --transition-smooth: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* === 全局重置与基础样式 === */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    opacity: 0; /* 页面加载淡入初始状态 */
    animation: fadeInPage 1s ease forwards;
    overflow-x: hidden;
}

@keyframes fadeInPage {
    to { opacity: 1; }
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* === 排版样式 === */
h1, h2, h3, h4 {
    font-weight: 400;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 300;
}

/* === 通用组件 === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-xl) 0;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border: 1px solid var(--text-primary);
    color: var(--text-primary);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-sm);
}

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

/* 动态槽位容器 - 预留给未来功能 */
.slot-container {
    display: none; 
}

/* === 导航栏 === */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(18, 18, 18, 0.95);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    z-index: 1001;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

/* 移动端菜单开关 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

/* === 首页 (index.html) === */
.hero {
    height: 100vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.6); /* 压暗图片以突出文字 */
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 var(--spacing-sm);
    animation: slideUp 1s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    margin-bottom: var(--spacing-sm);
}

.slider-controls {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 12px;
}

.control-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition-fast);
}

.control-dot.active {
    background-color: var(--text-primary);
}

/* === 系列页面 (collections.html) === */
.collection-category {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
}

.category-header {
    margin-bottom: var(--spacing-md);
    max-width: 600px;
}

.grid-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.grid-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3/4;
    cursor: pointer;
}

.grid-item img {
    width: 100%;
    height: 100%;
    transition: transform var(--transition-smooth);
}

.grid-item:hover img {
    transform: scale(1.08);
}

.grid-desc {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 20px;
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.grid-item:hover .grid-desc {
    opacity: 1;
    transform: translateY(0);
}

/* === 风格指南页面 (guide.html) === */
.guide-hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-lg);
    background-color: var(--bg-secondary);
    text-align: center;
}

.trend-module, .occasion-module, .fabric-module {
    margin-bottom: var(--spacing-xl);
}

.guide-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.guide-block.reverse {
    direction: rtl; /* 简单的左右互换实现 */
}

.guide-block.reverse .guide-text {
    direction: ltr;
}

.guide-text h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.seasonal-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.season-card {
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm);
    text-align: center;
}

.season-card img {
    margin-bottom: var(--spacing-sm);
    aspect-ratio: 3/4;
}

/* === 页脚 === */
.site-footer {
    padding: var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    background-color: var(--bg-primary);
}

.site-footer p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

/* === 响应式设计 === */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.8rem; }
    
    .navbar {
        padding: var(--spacing-sm);
    }

    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right var(--transition-fast);
        z-index: 1000;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.5rem;
    }

    /* 汉堡菜单动画 */
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }

    .guide-block, 
    .guide-block.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    
    .seasonal-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    
    .seasonal-grid {
        grid-template-columns: 1fr;
    }
    
    .grid-gallery {
        grid-template-columns: 1fr;
    }
}