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

:root {
  --color-white: #FFFFFF;
  --color-light-gray: #F8F8F8;
  --color-dark-gray: #333333;
  --color-black: #000000;
  --color-accent: #999999;
  --transition-speed: 0.3s;
  --font-base: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
  font-family: var(--font-base);
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-dark-gray);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* 导航栏样式 */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--color-dark-gray);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 1px;
  transition: color var(--transition-speed);
  position: relative;
}

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

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

.nav-links a.active {
  color: var(--color-black);
  font-weight: 500;
}

/* 首页轮播样式 */
.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  margin-top: 70px;
}

.slider-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
}

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

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

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

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

.slide-title {
  font-size: 3rem;
  font-weight: 500;
  letter-spacing: 3px;
  margin-bottom: 1rem;
}

.slide-subtitle {
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 2px;
}

/* 轮播控制按钮 */
.slider-controls {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 1rem;
  z-index: 10;
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all var(--transition-speed);
}

.slider-dot.active {
  background: var(--color-white);
  width: 30px;
  border-radius: 5px;
}

/* 探索按钮 */
.explore-btn {
  position: absolute;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 1rem 2.5rem;
  background: transparent;
  border: 2px solid var(--color-white);
  color: var(--color-white);
  font-size: 0.95rem;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all var(--transition-speed);
  text-decoration: none;
  display: inline-block;
}

.explore-btn:hover {
  background: var(--color-white);
  color: var(--color-black);
}

/* 画廊页面样式 */
.gallery-container {
  max-width: 1400px;
  margin: 100px auto 2rem;
  padding: 0 2rem;
}

.gallery-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: 3px;
  margin-bottom: 3rem;
  color: var(--color-black);
}

/* 筛选标签 */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 0.8rem 2rem;
  background: transparent;
  border: 1px solid var(--color-dark-gray);
  color: var(--color-dark-gray);
  font-size: 0.9rem;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

/* 网格布局 */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

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

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.gallery-item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: var(--color-white);
  opacity: 0;
  transition: opacity var(--transition-speed);
}

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

/* 设计理念页面样式 */
.philosophy-container {
  max-width: 1400px;
  margin: 100px auto 2rem;
  padding: 0 2rem;
}

.philosophy-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: 3px;
  margin-bottom: 4rem;
  color: var(--color-black);
}

.philosophy-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-bottom: 6rem;
  align-items: center;
}

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

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

.philosophy-image {
  width: 100%;
  height: 500px;
  overflow: hidden;
}

.philosophy-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.philosophy-text {
  padding: 2rem;
}

.philosophy-text h3 {
  font-size: 1.8rem;
  font-weight: 500;
  letter-spacing: 2px;
  margin-bottom: 1.5rem;
  color: var(--color-black);
}

.philosophy-text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-dark-gray);
  margin-bottom: 1rem;
}

/* 页脚样式 */
.footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.75rem;
  color: var(--color-accent);
  background: var(--color-light-gray);
  margin-top: 4rem;
}

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

  .nav-links a {
    font-size: 0.85rem;
  }

  .slide-title {
    font-size: 2rem;
  }

  .slide-subtitle {
    font-size: 1rem;
  }

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

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

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

  .philosophy-image {
    height: 400px;
  }

  .filter-tabs {
    gap: 1rem;
  }

  .filter-tab {
    padding: 0.6rem 1.5rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .nav-bar {
    padding: 1rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .slide-title {
    font-size: 1.5rem;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-title,
  .philosophy-title {
    font-size: 1.8rem;
  }

  .philosophy-text {
    padding: 1rem;
  }
}