/* 全局样式重置与基础设置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-ivory: #FFFFF0;
  --color-light-gray: #F5F5F5;
  --color-soft-black: #1A1A1A;
  --color-terracotta: #E3B6A3;
  --color-oatmeal: #D8CFC4;
  --color-deep-gray-blue: #2C3E50;
  --font-serif: 'Noto Serif SC', serif;
  --font-sans: 'Noto Sans SC', sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-soft-black);
  background-color: var(--color-ivory);
  line-height: 1.8;
  overflow-x: hidden;
}

/* 导航栏样式 */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 240, 0.95);
  backdrop-filter: blur(10px);
  padding: 1.5rem 5%;
  transition: var(--transition-smooth);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

nav.scrolled {
  padding: 1rem 5%;
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.1);
}

nav ul {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3rem;
  list-style: none;
}

nav a {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-soft-black);
  text-decoration: none;
  position: relative;
  transition: var(--transition-smooth);
  letter-spacing: 0.05em;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 2px;
  background: var(--color-terracotta);
  transition: var(--transition-smooth);
}

nav a:hover::after,
nav a.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* 轮播图容器 */
.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  margin-top: 0;
}

.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;
  object-position: center;
}

.slide-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent);
  padding: 3rem 5%;
  color: white;
}

.slide-overlay h2 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

/* 主要内容区域 */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 5rem 5%;
}

section {
  margin-bottom: 6rem;
}

h1 {
  font-family: var(--font-serif);
  font-size: 3rem;
  text-align: center;
  margin-bottom: 2rem;
  letter-spacing: 0.08em;
  color: var(--color-soft-black);
}

h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  color: var(--color-deep-gray-blue);
}

h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
  color: var(--color-soft-black);
}

p {
  font-size: 1.1rem;
  line-height: 2;
  margin-bottom: 1.5rem;
  color: var(--color-soft-black);
}

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

.grid-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  transition: var(--transition-smooth);
  background: var(--color-light-gray);
}

.grid-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.grid-item img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: var(--transition-smooth);
}

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

.grid-item-content {
  padding: 2rem;
}

/* 按钮样式 */
.btn-group {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 3rem;
}

.btn {
  padding: 1rem 2.5rem;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-soft-black);
  background: transparent;
  border: 2px solid var(--color-terracotta);
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  display: inline-block;
  letter-spacing: 0.05em;
}

.btn:hover {
  background: var(--color-terracotta);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(227, 182, 163, 0.3);
}

/* 特色展示区 */
.welcome-text {
  text-align: center;
  max-width: 800px;
  margin: 3rem auto;
  font-size: 1.2rem;
  line-height: 2.2;
  color: var(--color-deep-gray-blue);
}

/* 设计理念页面 */
.philosophy-section {
  margin-bottom: 5rem;
}

.philosophy-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 4rem;
}

.philosophy-content:nth-child(even) {
  direction: rtl;
}

.philosophy-content:nth-child(even) > * {
  direction: ltr;
}

.philosophy-image {
  width: 100%;
  height: 500px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

/* 精选系列页面 */
.collection-intro {
  text-align: center;
  max-width: 700px;
  margin: 2rem auto 4rem;
  font-size: 1.2rem;
  color: var(--color-deep-gray-blue);
}

.collection-category {
  margin-bottom: 5rem;
}

.category-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.category-image {
  width: 100%;
  height: 450px;
  object-fit: cover;
  border-radius: 8px;
  transition: var(--transition-smooth);
}

.category-image:hover {
  transform: scale(1.02);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

/* 页脚样式 */
footer {
  text-align: center;
  padding: 2rem;
  background: var(--color-light-gray);
  color: var(--color-soft-black);
  font-family: var(--font-serif);
  letter-spacing: 0.1em;
}

/* 响应式设计 */
@media (max-width: 768px) {
  nav ul {
    gap: 1.5rem;
  }

  nav a {
    font-size: 1rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .slide-overlay h2 {
    font-size: 1.8rem;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .philosophy-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .philosophy-content:nth-child(even) {
    direction: ltr;
  }

  .btn-group {
    flex-direction: column;
    gap: 1rem;
  }

  .category-images {
    grid-template-columns: 1fr;
  }

  main {
    padding: 3rem 5%;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }

  .welcome-text,
  .collection-intro {
    font-size: 1rem;
  }

  nav ul {
    gap: 1rem;
  }

  .hero-slider {
    height: 60vh;
  }
}

/* 图片懒加载占位 */
img[data-src] {
  filter: blur(10px);
  transition: filter 0.5s;
}

img[data-src].loaded {
  filter: blur(0);
}