/* CSS变量定义 - 颜色方案 */
:root {
  --color-primary-gray: #F5F5F5;
  --color-white: #FFFFFF;
  --color-gold: #C0A975;
  --color-black: #2A2A2A;
  --color-beige: #F8F4E9;
  --color-charcoal: #3C3C3C;
  --transition-smooth: all 0.3s ease;
}

/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Noto Sans SC', 'Source Han Sans', -apple-system, sans-serif;
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-black);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* 字体优化 */
h1, h2, h3 {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', serif;
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* 导航栏样式 */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.5rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: transparent;
  transition: var(--transition-smooth);
}

.nav.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav__logo {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-black);
  text-decoration: none;
  letter-spacing: 0.1em;
}

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

.nav__link {
  color: var(--color-black);
  text-decoration: none;
  font-size: 0.95rem;
  position: relative;
  transition: var(--transition-smooth);
}

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

.nav__link:hover::after {
  width: 100%;
}

/* 轮播图样式 */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.hero__slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero__slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease;
}

.hero__slide.active {
  opacity: 1;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.3));
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__text {
  text-align: center;
  color: var(--color-white);
  max-width: 800px;
  padding: 2rem;
}

.hero__text h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  letter-spacing: 0.15em;
}

.hero__dots {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 1rem;
}

.hero__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.hero__dot.active {
  background-color: var(--color-white);
  transform: scale(1.2);
}

/* 特色展示区 */
.features {
  padding: 6rem 5%;
  background-color: var(--color-primary-gray);
}

.features__title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 4rem;
  color: var(--color-black);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  max-width: 1400px;
  margin: 0 auto;
}

.feature__card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.feature__image {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.feature__card:hover .feature__image {
  transform: scale(1.05);
}

.feature__content {
  padding: 1.5rem 0;
  text-align: center;
}

.feature__subtitle {
  font-size: 1.1rem;
  color: var(--color-charcoal);
}

/* 理念摘要区 */
.philosophy-preview {
  padding: 6rem 5%;
  background-color: var(--color-beige);
  text-align: center;
}

.philosophy-preview__title {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--color-black);
}

.philosophy-preview__text {
  max-width: 800px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
  line-height: 2;
  color: var(--color-charcoal);
}

.btn {
  display: inline-block;
  padding: 1rem 3rem;
  background-color: var(--color-black);
  color: var(--color-white);
  text-decoration: none;
  transition: var(--transition-smooth);
  border: 2px solid var(--color-black);
}

.btn:hover {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-black);
}

/* 系列展示页样式 */
.collections {
  display: flex;
  min-height: calc(100vh - 80px);
  margin-top: 80px;
}

.collections__sidebar {
  width: 250px;
  background-color: var(--color-primary-gray);
  padding: 3rem 2rem;
  position: sticky;
  top: 80px;
  height: calc(100vh - 80px);
}

.collections__nav {
  list-style: none;
}

.collections__nav-item {
  margin-bottom: 2rem;
}

.collections__nav-link {
  color: var(--color-charcoal);
  text-decoration: none;
  font-size: 1.1rem;
  transition: var(--transition-smooth);
  display: block;
  padding: 0.5rem 0;
}

.collections__nav-link.active,
.collections__nav-link:hover {
  color: var(--color-gold);
  padding-left: 1rem;
}

.collections__content {
  flex: 1;
  padding: 4rem 5%;
}

.collection__section {
  display: none;
}

.collection__section.active {
  display: block;
}

.collection__title {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.collection__description {
  font-size: 1.1rem;
  margin-bottom: 3rem;
  color: var(--color-charcoal);
  max-width: 800px;
}

.collection__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.collection__item {
  position: relative;
  overflow: hidden;
}

.collection__image {
  width: 100%;
  height: 450px;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.collection__item:hover .collection__image {
  transform: scale(1.05);
}

.collection__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  padding: 2rem;
  transform: translateY(100%);
  transition: var(--transition-smooth);
}

.collection__item:hover .collection__overlay {
  transform: translateY(0);
}

.collection__label {
  color: var(--color-white);
  font-size: 1rem;
}

/* 工艺理念页样式 */
.philosophy-hero {
  position: relative;
  height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 80px;
  background-size: cover;
  background-position: center;
}

.philosophy-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
}

.philosophy-hero__content {
  position: relative;
  text-align: center;
  color: var(--color-white);
  max-width: 800px;
  padding: 2rem;
}

.philosophy-hero__title {
  font-size: 3rem;
  margin-bottom: 2rem;
}

.philosophy-hero__text {
  font-size: 1.2rem;
  line-height: 2;
}

.craftsmanship {
  padding: 6rem 5%;
  background-color: var(--color-white);
}

.craftsmanship__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.craft__item {
  text-align: center;
}

.craft__image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  margin-bottom: 2rem;
}

.craft__title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.craft__description {
  color: var(--color-charcoal);
  line-height: 1.8;
}

.sustainability {
  padding: 6rem 5%;
  background-color: var(--color-primary-gray);
}

.sustainability__content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.sustainability__text {
  padding: 2rem;
}

.sustainability__title {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.sustainability__description {
  font-size: 1.1rem;
  line-height: 2;
  color: var(--color-charcoal);
}

.sustainability__image {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

/* 页脚样式 */
.footer {
  padding: 3rem 5%;
  text-align: center;
  border-top: 1px solid var(--color-primary-gray);
}

.footer__text {
  color: var(--color-charcoal);
  font-size: 0.95rem;
}

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
  .nav__menu {
    gap: 2rem;
  }

  .features__grid,
  .collection__grid,
  .craftsmanship__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }

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

  .collections__sidebar {
    width: 200px;
  }
}

/* 响应式设计 - 手机 */
@media (max-width: 768px) {
  .nav {
    padding: 1rem 3%;
  }

  .nav__menu {
    gap: 1.5rem;
    font-size: 0.9rem;
  }

  .hero__text h1 {
    font-size: 2rem;
  }

  .features__grid,
  .collection__grid,
  .craftsmanship__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .features__title,
  .philosophy-preview__title,
  .collection__title,
  .philosophy-hero__title,
  .sustainability__title {
    font-size: 2rem;
  }

  .collections {
    flex-direction: column;
  }

  .collections__sidebar {
    width: 100%;
    height: auto;
    position: static;
  }

  .collections__nav {
    display: flex;
    overflow-x: auto;
  }

  .collections__nav-item {
    margin-bottom: 0;
    margin-right: 2rem;
  }

  .feature__image,
  .collection__image,
  .craft__image,
  .sustainability__image {
    height: 350px;
  }
}

@media (max-width: 480px) {
  .nav__logo {
    font-size: 1.2rem;
  }

  .nav__menu {
    gap: 1rem;
  }

  .hero__text h1 {
    font-size: 1.5rem;
  }

  .features,
  .philosophy-preview,
  .collections__content,
  .craftsmanship,
  .sustainability {
    padding: 3rem 5%;
  }
}