/* 
 * 风尚美学馆 (Fashion Aesthetics Gallery) - 全局样式表
 * 设计风格：极简现代主义 | 核心原则：纯粹视觉展示
 */

:root {
  /* 色彩系统 */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F7;
  --bg-accent: #FAF9F6;
  
  --text-main: #2C2C2C;
  --text-muted: #4A4A4A;
  --text-light: #888888;
  
  --color-terra-cotta: #E8B4B8;
  --color-deep-sea: #2A3B5C;
  --color-oatmeal: #D8CFC4;
  
  --footer-bg: #1A1A1A;
  --footer-text: #CCCCCC;

  /* 字体系统 */
  --font-primary: 'Helvetica Now Display', 'Montserrat', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --font-heading: 'Montserrat', 'PingFang SC', sans-serif;
  
  /* 间距与布局 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  --container-width: 1440px;
  --header-height: 80px;
  
  /* 动画 */
  --transition-smooth: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: all 0.3s ease;
}

/* --- 基础重置 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* --- 排版 --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-sm);
}

.text-center { text-align: center; }
.text-justify { text-align: justify; }
.uppercase { text-transform: uppercase; letter-spacing: 0.1em; }

.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
  position: relative;
  display: inline-block;
  padding-bottom: var(--spacing-sm);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 1px;
  background-color: var(--text-main);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-muted);
}

/* --- 布局工具 --- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.section-bg {
  background-color: var(--bg-secondary);
}

.grid {
  display: grid;
  gap: var(--spacing-md);
}

/* --- 导航栏 (Glassmorphism) --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--spacing-lg);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: var(--transition-smooth);
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-main);
}

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

.nav-item {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  position: relative;
}

.nav-item::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -4px;
  left: 0;
  background-color: var(--text-main);
  transition: width 0.3s ease;
}

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

.nav-item:hover, .nav-item.active {
  color: var(--text-main);
}

/* --- 首页轮播 (Hero) --- */
.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
  background-size: cover;
  background-position: center;
  z-index: 1;
}

.slide.active {
  opacity: 1;
  z-index: 2;
}

.slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.2); /* 轻微暗化以突出文字 */
}

.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
  text-align: center;
  color: #fff;
  width: 80%;
}

.hero-title {
  font-size: 4rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s ease forwards 0.5s;
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s ease forwards 0.8s;
}

/* --- 通用组件：卡片与悬停 --- */
.card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.card-image-wrapper {
  overflow: hidden;
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 140%; /* 纵向长图比例 */
}

.card-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.2, 1, 0.3, 1);
}

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

.card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  opacity: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
  transition: opacity 0.4s ease;
  text-align: center;
}

.card:hover .card-overlay {
  opacity: 1;
}

.card-title {
  font-size: 1.5rem;
  color: var(--text-main);
  margin-bottom: var(--spacing-sm);
  transform: translateY(20px);
  transition: transform 0.4s ease;
}

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

.card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  transform: translateY(20px);
  transition: transform 0.4s ease 0.1s;
}

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

/* --- 系列展示 (Collections) --- */
.collections-layout {
  display: flex;
  min-height: 100vh;
  padding-top: var(--header-height);
}

.sidebar {
  width: 250px;
  position: fixed;
  height: calc(100vh - var(--header-height));
  padding: var(--spacing-lg) var(--spacing-md);
  border-right: 1px solid rgba(0,0,0,0.05);
  background: var(--bg-primary);
  z-index: 90;
}

.sidebar ul li {
  margin-bottom: var(--spacing-md);
}

.sidebar a {
  font-size: 1.1rem;
  color: var(--text-muted);
  display: block;
  padding-left: var(--spacing-xs);
  border-left: 2px solid transparent;
}

.sidebar a.active, .sidebar a:hover {
  color: var(--text-main);
  border-left-color: var(--color-terra-cotta);
  padding-left: var(--spacing-sm);
}

.main-content {
  flex: 1;
  margin-left: 250px;
  padding: var(--spacing-lg);
  background: var(--bg-accent);
}

.masonry-grid {
  column-count: 3;
  column-gap: var(--spacing-md);
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--spacing-md);
}

/* --- 设计美学 (Aesthetics) --- */
.aesthetics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  padding: var(--spacing-xl) 0;
}

.aesthetic-col {
  padding: var(--spacing-md);
  background: var(--bg-primary);
  transition: var(--transition-smooth);
}

.aesthetic-col:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.03);
}

/* --- 搭配艺术 (Styling) --- */
.styling-container {
  display: flex;
  height: calc(100vh - var(--header-height));
  margin-top: var(--header-height);
}

.styling-nav {
  width: 30%;
  background: var(--bg-secondary);
  padding: var(--spacing-xl) var(--spacing-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.styling-showcase {
  width: 70%;
  position: relative;
  overflow: hidden;
}

.styling-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.styling-slide.active {
  opacity: 1;
}

/* --- 细节之眼 (Details) --- */
.details-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0; /* 无缝拼接 */
}

.detail-item {
  position: relative;
  height: 50vh;
  overflow: hidden;
}

.magnify-icon {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  background: rgba(0,0,0,0.3);
  padding: 8px;
  border-radius: 50%;
  z-index: 5;
}

/* --- 灵感之源 (Inspiration) --- */
.inspiration-section {
  padding: var(--spacing-xl) 0;
}

.inspiration-block {
  display: flex;
  margin-bottom: var(--spacing-xl);
  align-items: center;
}

.inspiration-block:nth-child(even) {
  flex-direction: row-reverse;
}

.inspiration-img {
  flex: 1;
  height: 600px;
}

.inspiration-text {
  flex: 1;
  padding: var(--spacing-lg);
}

/* --- 页脚 --- */
.footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
  padding: 80px 0 40px;
  text-align: center;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-statement {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  font-weight: 300;
}

.footer-divider {
  height: 1px;
  background: rgba(255,255,255,0.1);
  width: 100%;
  margin: var(--spacing-lg) 0;
}

.copyright {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

.footer-note {
  font-size: 0.8rem;
  opacity: 0.6;
}

/* --- 动画关键帧 --- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- 响应式设计 --- */
@media (max-width: 1024px) {
  :root {
    --header-height: 70px;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .masonry-grid {
    column-count: 2;
  }
  
  .aesthetics-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .styling-container {
    flex-direction: column;
    height: auto;
  }
  
  .styling-nav, .styling-showcase {
    width: 100%;
  }
  
  .styling-showcase {
    height: 50vh;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
  }

  .navbar {
    padding: 0 var(--spacing-sm);
  }

  .nav-links {
    display: none; /* 移动端菜单需JS控制，这里暂隐 */
  }
  
  /* 简单的移动端汉堡菜单替代方案 */
  .mobile-menu-btn {
    display: block; 
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .collections-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    padding: var(--spacing-sm);
    overflow-x: auto;
    white-space: nowrap;
    border-right: none;
    border-bottom: 1px solid rgba(0,0,0,0.05);
  }

  .sidebar ul {
    display: flex;
    gap: var(--spacing-md);
  }
  
  .sidebar ul li {
    margin-bottom: 0;
  }

  .main-content {
    margin-left: 0;
    padding: var(--spacing-sm);
  }

  .masonry-grid {
    column-count: 1;
  }
  
  .details-grid {
    grid-template-columns: 1fr;
  }
  
  .inspiration-block, .inspiration-block:nth-child(even) {
    flex-direction: column;
  }
  
  .inspiration-img {
    width: 100%;
    height: 300px;
  }
}