/* 导航栏 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar__logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-dark);
}

.navbar__logo span {
  color: var(--color-primary);
}

.navbar__menu {
  display: flex;
  gap: var(--spacing-2xl);
}

.navbar__link {
  font-weight: 500;
  color: var(--color-gray-600);
  position: relative;
  padding: var(--spacing-sm) 0;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.navbar__link:hover::after,
.navbar__link.active::after {
  width: 100%;
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--color-primary);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.navbar__cart {
  position: relative;
  font-size: var(--text-xl);
  color: var(--color-gray-600);
}

.navbar__cart-count {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 18px;
  height: 18px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.navbar__hamburger span {
  width: 24px;
  height: 2px;
  background-color: var(--color-dark);
  transition: all var(--transition-base);
}

/* 页脚 */
.footer {
  background-color: var(--color-dark);
  color: var(--color-gray-300);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer__container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-2xl);
}

.footer__brand h3 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.footer__brand h3 span {
  color: var(--color-primary-light);
}

.footer__brand p {
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.footer__social {
  display: flex;
  gap: var(--spacing-md);
}

.footer__social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-700);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  transition: all var(--transition-base);
}

.footer__social a:hover {
  background-color: var(--color-primary);
  transform: translateY(-3px);
}

.footer__column h4 {
  color: var(--color-white);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-lg);
}

.footer__column ul li {
  margin-bottom: var(--spacing-sm);
}

.footer__column ul li a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

.footer__column ul li a:hover {
  color: var(--color-primary-light);
}

.footer__bottom {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-gray-700);
  text-align: center;
  font-size: var(--text-sm);
}

/* Hero区域 */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-light) 100%);
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero__content {
  max-width: 560px;
}

.hero__subtitle {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.hero__title {
  font-size: var(--text-6xl);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.hero__description {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-lg);
}

.hero__image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

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

.hero__image::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--color-primary-light) 0%, transparent 70%);
  opacity: 0.3;
  z-index: -1;
}

/* 分类区域 */
.categories {
  padding: var(--spacing-4xl) 0;
}

.categories__header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.categories__header h2 {
  margin-bottom: var(--spacing-md);
}

.categories__header p {
  color: var(--color-gray-500);
  max-width: 600px;
  margin: 0 auto;
}

.categories__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
}

.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  cursor: pointer;
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.category-card:hover img {
  transform: scale(1.1);
}

.category-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--spacing-xl);
  color: var(--color-white);
}

.category-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.category-card__count {
  font-size: var(--text-sm);
  opacity: 0.8;
}

/* 商品区域 */
.products-section {
  padding: var(--spacing-4xl) 0;
  background-color: var(--color-white);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  color: var(--color-gray-500);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
}

/* 促销横幅 */
.promo-banner {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
}

.promo-banner__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.promo-banner__content h2 {
  color: var(--color-white);
  font-size: var(--text-5xl);
  margin-bottom: var(--spacing-lg);
}

.promo-banner__content p {
  font-size: var(--text-lg);
  opacity: 0.9;
  margin-bottom: var(--spacing-2xl);
}

.promo-banner__image {
  text-align: center;
}

.promo-banner__image img {
  max-width: 100%;
  border-radius: var(--radius-xl);
}

/* 商品列表页 */
.products-page {
  padding: var(--spacing-3xl) 0;
}

.products-page__header {
  margin-bottom: var(--spacing-2xl);
}

.products-page__header h1 {
  margin-bottom: var(--spacing-sm);
}

.products-page__toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-gray-100);
}

.products-page__filters {
  display: flex;
  gap: var(--spacing-md);
}

.products-page__sort select {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
}

/* 商品详情页 */
.product-detail {
  padding: var(--spacing-3xl) 0;
}

.product-detail__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.product-detail__gallery {
  position: sticky;
  top: calc(var(--nav-height) + var(--spacing-xl));
}

.product-detail__main-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-xl);
  margin-bottom: var(--spacing-lg);
}

.product-detail__thumbnails {
  display: flex;
  gap: var(--spacing-md);
}

.product-detail__thumbnail {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color var(--transition-fast);
}

.product-detail__thumbnail.active {
  border-color: var(--color-primary);
}

.product-detail__info {
  padding: var(--spacing-lg) 0;
}

.product-detail__category {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-sm);
}

.product-detail__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--spacing-md);
}

.product-detail__price {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.product-detail__description {
  color: var(--color-gray-500);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.product-detail__options {
  margin-bottom: var(--spacing-xl);
}

.product-detail__option-group {
  margin-bottom: var(--spacing-lg);
}

.product-detail__option-label {
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.product-detail__option-values {
  display: flex;
  gap: var(--spacing-sm);
}

.product-detail__option-value {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.product-detail__option-value:hover {
  border-color: var(--color-primary);
}

.product-detail__option-value.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.product-detail__actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

/* 购物车页 */
.cart-page {
  padding: var(--spacing-3xl) 0;
}

.cart-page__container {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--spacing-2xl);
}

.cart-page__items h2 {
  margin-bottom: var(--spacing-xl);
}

.cart-page__empty {
  text-align: center;
  padding: var(--spacing-4xl) 0;
}

.cart-page__empty h3 {
  margin-bottom: var(--spacing-md);
}

.cart-page__summary {
  position: sticky;
  top: calc(var(--nav-height) + var(--spacing-xl));
}

/* 结算页 */
.checkout-page {
  padding: var(--spacing-3xl) 0;
}

.checkout-page__container {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--spacing-2xl);
}

.checkout-page__form h2 {
  margin-bottom: var(--spacing-xl);
}

.checkout-page__section {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.checkout-page__section h3 {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-gray-100);
}

.checkout-page__payment-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.checkout-page__payment-option {
  padding: var(--spacing-lg);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.checkout-page__payment-option:hover {
  border-color: var(--color-primary);
}

.checkout-page__payment-option.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* 成功页 */
.success-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.success-page__content {
  max-width: 500px;
}

.success-page__icon {
  width: 80px;
  height: 80px;
  background-color: var(--color-success);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-xl);
  color: var(--color-white);
  font-size: var(--text-4xl);
}

.success-page h1 {
  margin-bottom: var(--spacing-md);
}

.success-page p {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-2xl);
}

/* 响应式 */
@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .categories__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer__container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar__menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  
  .navbar__menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .navbar__hamburger {
    display: flex;
  }
  
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero__content {
    max-width: 100%;
  }
  
  .hero__actions {
    justify-content: center;
  }
  
  .hero__image {
    display: none;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .categories__grid {
    grid-template-columns: 1fr;
  }
  
  .promo-banner__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .product-detail__container {
    grid-template-columns: 1fr;
  }
  
  .product-detail__gallery {
    position: static;
  }
  
  .cart-page__container,
  .checkout-page__container {
    grid-template-columns: 1fr;
  }
  
  .footer__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}