/* =========================================
   设计令牌 (Design Tokens) - 现代时尚男装主题
   ========================================= */
:root {
  /* 核心调色板 */
  --color-primary: #333333;       /* 深灰 - 主标题/正文 */
  --color-secondary: #3E4C59;     /* 炭灰 - 次要信息 */
  --color-accent: #0A2463;        /* 深蓝 - 交互/强调 */
  --color-bg-body: #FFFFFF;       /* 纯白 - 页面背景 */
  --color-bg-surface: #F8F5F1;    /* 米色 - 温暖区块背景 */
  --color-bg-light: #F5F5F5;      /* 浅灰 - 分割线/弱背景 */
  --color-text-inverse: #FFFFFF;  /* 反白文字 */

  /* 字体系统 */
  --font-family-base: 'Helvetica Neue', Helvetica, Arial, 'Source Han Sans CN', 'PingFang SC', sans-serif;
  --font-family-heading: var(--font-family-base);
  
  /* 布局参数 */
  --spacing-unit: 1rem;
  --container-width: 1280px;
  --header-height: 80px;
  
  /* 动效参数 */
  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  
  /* Pico.css 变量覆盖 - 强制极简风格 */
  --pico-font-family: var(--font-family-base);
  --pico-background-color: var(--color-bg-body);
  --pico-color: var(--color-primary);
  --pico-primary: var(--color-primary);
  --pico-primary-background: var(--color-primary);
  --pico-primary-hover: var(--color-accent);
  --pico-primary-underline: var(--color-accent);
  --pico-border-radius: 0px; /* 时尚界偏好锐利的直角 */
  --pico-form-element-spacing-vertical: 0.75rem;
  --pico-form-element-spacing-horizontal: 1.5rem;
  --pico-typography-spacing-vertical: 1.5rem;
}

/* =========================================
   全局重置与基础排版
   ========================================= */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family-base);
  color: var(--color-primary);
  background-color: var(--color-bg-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
}

/* 标题排版 */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 0;
}

h1 { font-size: 3.5rem; line-height: 1.1; margin-bottom: 1.5rem; }
h2 { font-size: 2.25rem; margin-bottom: 2rem; font-weight: 500; }
h3 { font-size: 1.5rem; font-weight: 500; letter-spacing: 0.05em; }

p {
  color: var(--color-secondary);
  margin-bottom: 1.5rem;
  max-width: 65ch; /* 优化阅读体验 */
}

a {
  text-decoration: none;
  color: var(--color-primary);
  transition: var(--transition-smooth);
}

a:hover {
  color: var(--color-accent);
}

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

/* 布局容器 */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* 去除Pico默认padding */
body > header, body > main, body > footer {
  padding: 0;
}

/* =========================================
   组件：导航栏 (Sticky Header)
   ========================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  transition: var(--transition-smooth);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 0.25rem 0.75rem;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 3rem;
}

.nav-link {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 500;
  color: var(--color-secondary);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

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

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

/* =========================================
   组件：Hero 轮播展示区
   ========================================= */
.hero-section {
  height: 100vh;
  width: 100%;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #000;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center top;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  filter: brightness(0.85); /* 降低亮度提升文字可读性 */
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1.02); /* 微弱缩放动效 */
  transition: opacity 1.2s ease-in-out, transform 6s ease-out;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: var(--color-text-inverse);
  max-width: 800px;
  padding: 0 1rem;
}

.hero-title {
  color: var(--color-text-inverse);
  font-size: 4.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.hero-desc {
  font-size: 1.25rem;
  font-weight: 300;
  margin-bottom: 3rem;
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.05em;
}

.btn-outline-white {
  display: inline-block;
  padding: 1rem 3rem;
  border: 1px solid #fff;
  color: #fff;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  transition: all 0.3s ease;
  background: transparent;
}

.btn-outline-white:hover {
  background: #fff;
  color: #000;
}

/* =========================================
   组件：通用区块布局
   ========================================= */
.section-padding {
  padding: 6rem 0;
}

.bg-light { background-color: var(--color-bg-light); }
.bg-surface { background-color: var(--color-bg-surface); }

.section-header {
  text-align: center;
  margin-bottom: 5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-secondary);
  margin-bottom: 1rem;
}

/* =========================================
   组件：网格画廊 (Gallery)
   ========================================= */
.grid-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

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

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.2, 1, 0.2, 1);
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  transition: opacity 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-text {
  color: #fff;
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transform: translateY(20px);
  transition: transform 0.4s ease;
  border: 1px solid rgba(255,255,255,0.5);
  padding: 0.75rem 1.5rem;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(4px);
}

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

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-item:hover .gallery-text {
  transform: translateY(0);
}

/* =========================================
   组件：卡片 (Cards)
   ========================================= */
.card-group {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.style-card {
  flex: 1;
  min-width: 280px;
  background: #fff;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.style-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.06);
}

.card-image-wrapper {
  overflow: hidden;
  aspect-ratio: 4/5;
}

.card-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.style-card:hover .card-image-wrapper img {
  transform: scale(1.05);
}

.card-content {
  padding: 2rem;
  border: 1px solid var(--color-bg-light);
  border-top: none;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: block;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

/* =========================================
   组件：细节页布局
   ========================================= */
.detail-hero {
  height: 60vh;
  position: relative;
  overflow: hidden;
}

.detail-split {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4rem;
  margin-bottom: 6rem;
}

.detail-split.reverse {
  flex-direction: row-reverse;
}

.split-image {
  flex: 1;
  min-width: 300px;
}

.split-content {
  flex: 1;
  min-width: 300px;
  padding: 2rem;
}

.material-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.material-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 1.5rem;
  border: 4px solid var(--color-bg-light);
}

.material-circle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* =========================================
   页脚
   ========================================= */
.site-footer {
  background-color: #111;
  color: #666;
  padding: 4rem 0;
  text-align: center;
  margin-top: auto;
}

.footer-text {
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

/* =========================================
   工具类 (Utilities)
   ========================================= */
.text-center { text-align: center; }
.mt-4 { margin-top: 4rem; }
.mb-2 { margin-bottom: 2rem; }
.w-full { width: 100%; }
.object-cover { object-fit: cover; }
.tracking-wide { letter-spacing: 0.1em; }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1); }

/* 动态插槽 - 预留 */
.slot-placeholder {
  min-height: 50px;
  border: 1px dashed var(--color-border);
  display: none; /* 默认隐藏，有内容时脚本激活 */
}