/* 
 * 全局样式文件 - 风尚视觉
 * 遵循现代极简主义设计原则
 * 适配 mvp.css 基础样式并进行高定风格化
 */

:root {
  /* 调色板 - 柔和中性色系 */
  --color-bg: #ffffff;
  --color-bg-alt: #f8f8f8;
  --color-text-main: #333333;
  --color-text-light: #666666;
  --color-accent: #d2c8bd; /* 裸色 */
  --color-border: #e5e5e5;
  
  /* 布局与间距 */
  --spacing-unit: 8px;
  --container-width: 1200px;
  --header-height: 80px;
  
  /* 动效 */
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-base: 0.3s ease;
}

/* === 基础重置与排版 === */
body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text-main);
  background-color: var(--color-bg);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 覆盖 mvp.css 的部分默认粗犷样式，使其更精致 */
header, main, footer {
  padding: 0;
  max-width: 100%;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 400; /* 细体标题 */
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

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

/* === 布局工具类 === */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* 响应式栅格调整 */
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.text-center { text-align: center; }
.mt-4 { margin-top: 4rem; }
.mb-4 { margin-bottom: 4rem; }

/* === 导航栏 === */
.site-header {
  height: var(--header-height);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.site-header.scrolled {
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  font-weight: 500;
  color: var(--color-text-main);
}

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  position: relative;
  padding-bottom: 5px;
}

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

.nav-link:hover { color: var(--color-text-main); }
.nav-link:hover::after { width: 100%; }

/* === 首页：轮播图 === */
.hero-slider {
  position: relative;
  height: calc(100vh - var(--header-height));
  min-height: 600px;
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

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

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

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 极其缓慢的缩放效果 */
  animation: subtleZoom 20s infinite alternate; 
}

@keyframes subtleZoom {
  from { transform: scale(1); }
  to { transform: scale(1.05); }
}

.slide-content {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: white;
  z-index: 3;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.slide-title {
  font-size: 2rem; /* 实际上不需要太大，优雅为主 */
  font-weight: 300;
  letter-spacing: 0.2em;
  margin: 0;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.8s ease 0.5s;
}

.slide.active .slide-title {
  opacity: 1;
  transform: translateY(0);
}

/* === 特色展示区 & 卡片 === */
.section-title {
  font-size: 1.5rem;
  text-align: center;
  margin: 4rem 0 2rem;
  letter-spacing: 0.1em;
  color: var(--color-text-main);
  position: relative;
}

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

.feature-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.feature-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(2px);
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.4s ease;
}

.feature-text {
  background: #fff;
  color: #000;
  padding: 10px 20px;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  transform: translateY(10px);
  transition: transform 0.4s ease;
}

.feature-card:hover img { transform: scale(1.05); }
.feature-card:hover .feature-overlay { opacity: 1; }
.feature-card:hover .feature-text { transform: translateY(0); }

/* === 编辑推荐区（图文混排） === */
.editor-pick {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: center;
  margin: 4rem auto;
}

.editor-content {
  padding: 2rem;
}

.editor-desc {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  text-align: justify;
}

/* === 系列展示页面 === */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 3rem 0;
  flex-wrap: wrap;
}

.filter-item {
  cursor: pointer;
  padding: 8px 16px;
  border: 1px solid transparent;
  transition: all 0.3s;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

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

.details-scroll {
  display: flex;
  overflow-x: auto;
  gap: 20px;
  padding: 20px 0;
  scrollbar-width: none; /* Firefox */
}
.details-scroll::-webkit-scrollbar { display: none; } /* Chrome/Safari */

.detail-item {
  min-width: 300px;
  flex-shrink: 0;
}

/* === 风格指南页面 === */
.philosophy-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.philosophy-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
  color: var(--color-text-light);
}

.lookbook-card {
  margin-bottom: 4rem;
}

.lookbook-main-img {
  aspect-ratio: 16/9;
  object-fit: cover;
  margin-bottom: 1rem;
}

.lookbook-items {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.color-palette {
  display: flex;
  height: 100px;
  width: 100%;
  margin-bottom: 1rem;
}

.color-swatch {
  flex: 1;
  transition: flex 0.3s ease;
}
.color-swatch:hover { flex: 1.5; }

/* === 页脚 === */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  text-align: center;
  margin-top: 4rem;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* === 汉堡菜单 (Mobile) === */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* 简化处理，实际项目应配合JS做展开 */
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: white;
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  }
  
  .nav-links.active { display: flex; }
  .mobile-menu-btn { display: block; }
  
  .editor-pick { grid-template-columns: 1fr; gap: 2rem; }
  .hero-slider { height: 50vh; }
}

/* === 辅助动效 === */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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