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

:root {
  --color-ivory: #FDFDF8;
  --color-gray-light: #E8E8E8;
  --color-gray: #C4C4C4;
  --color-oat: #E5DCC5;
  --color-charcoal: #2C2C2C;
  --color-accent: #B8A398;
  --font-primary: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

/* 导航栏 */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(253, 253, 248, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1.5rem 5%;
  border-bottom: 1px solid var(--color-gray-light);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--color-charcoal);
}

.nav-menu {
  display: flex;
  gap: 3rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-charcoal);
  transition: var(--transition);
}

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

/* 页面容器 */
.page-container {
  margin-top: 80px;
  min-height: calc(100vh - 160px);
}

/* 英雄区域 */
.hero-section {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.9);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(44, 44, 44, 0.15);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: var(--color-ivory);
  padding: 0 2rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 200;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  opacity: 0.95;
}

.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-left: 2px solid var(--color-ivory);
  border-bottom: 2px solid var(--color-ivory);
  transform: rotate(-45deg);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* 内容区域 */
.content-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 8rem 5% 6rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 200;
  letter-spacing: 0.05em;
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 300;
  text-align: center;
  color: var(--color-gray);
  margin-bottom: 5rem;
  letter-spacing: 0.05em;
}

/* 网格布局 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
}

.grid-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.grid-image {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  transition: var(--transition);
}

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

.grid-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(44, 44, 44, 0.8), transparent);
  padding: 2rem;
  transform: translateY(100%);
  transition: var(--transition);
}

.grid-item:hover .grid-overlay {
  transform: translateY(0);
}

.grid-text {
  color: var(--color-ivory);
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: 0.05em;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  background: transparent;
  border: 1px solid var(--color-charcoal);
  color: var(--color-charcoal);
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: var(--transition);
}

.btn:hover {
  background: var(--color-charcoal);
  color: var(--color-ivory);
}

/* 趋势卡片 */
.trend-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.trend-card {
  padding: 2rem;
  background: var(--color-gray-light);
  transition: var(--transition);
}

.trend-card:hover {
  background: var(--color-oat);
  transform: translateY(-5px);
}

.trend-title {
  font-size: 1.3rem;
  font-weight: 400;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.trend-text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-charcoal);
  opacity: 0.85;
}

/* 系列展示 */
.collection-block {
  margin-bottom: 8rem;
}

.collection-hero {
  position: relative;
  height: 70vh;
  margin-bottom: 3rem;
  overflow: hidden;
}

.collection-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.collection-info {
  max-width: 900px;
  margin: 0 auto 3rem;
  text-align: center;
  padding: 0 2rem;
}

.collection-name {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 300;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

.collection-desc {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-charcoal);
  opacity: 0.85;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.collection-item img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  transition: var(--transition);
}

.collection-item:hover img {
  opacity: 0.85;
}

/* 风格指南 */
.style-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 5rem;
  padding: 0 2rem;
}

.style-quote {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 300;
  line-height: 1.8;
  font-style: italic;
  color: var(--color-charcoal);
  opacity: 0.9;
}

.style-topic {
  margin-bottom: 6rem;
}

.topic-visual {
  width: 100%;
  height: 50vh;
  object-fit: cover;
  margin-bottom: 3rem;
}

.topic-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

.topic-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 300;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

.topic-text {
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 2rem;
  color: var(--color-charcoal);
  opacity: 0.85;
}

.topic-examples {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.example-img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}

/* 页脚 */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--color-gray-light);
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: var(--color-charcoal);
  opacity: 0.7;
}

/* 懒加载动画 */
.lazy-load {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.lazy-load.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-menu {
    gap: 1.5rem;
  }
  
  .nav-link {
    font-size: 0.85rem;
  }
  
  .content-section {
    padding: 5rem 5% 4rem;
  }
  
  .grid-3, .collection-grid, .topic-examples {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .trend-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav-header {
    padding: 1rem 5%;
  }
  
  .nav-logo {
    font-size: 1.2rem;
  }
  
  .nav-menu {
    gap: 1rem;
  }
}