/* ==================== CSS变量系统 ==================== */
:root {
  /* 颜色系统 */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary-color: #ec4899;
  --accent-color: #f59e0b;
  
  /* 文本颜色 */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --text-white: #ffffff;
  
  /* 背景颜色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-dark: #111827;
  
  /* 边框颜色 */
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  
  /* 字体系统 */
  --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 2rem;        /* 32px */
  --font-size-4xl: 2.5rem;      /* 40px */
  --font-size-5xl: 3rem;        /* 48px */
  
  /* 字重 */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  
  /* 间距系统 */
  --spacing-xs: 0.25rem;        /* 4px */
  --spacing-sm: 0.5rem;         /* 8px */
  --spacing-md: 1rem;           /* 16px */
  --spacing-lg: 1.5rem;         /* 24px */
  --spacing-xl: 2rem;           /* 32px */
  --spacing-2xl: 3rem;          /* 48px */
  --spacing-3xl: 4rem;          /* 64px */
  
  /* 圆角系统 */
  --radius-sm: 0.375rem;        /* 6px */
  --radius-md: 0.5rem;          /* 8px */
  --radius-lg: 0.75rem;         /* 12px */
  --radius-xl: 1rem;            /* 16px */
  --radius-2xl: 1.5rem;         /* 24px */
  --radius-full: 9999px;
  
  /* 阴影系统 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* 过渡动画 */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* 容器宽度 */
  --container-max-width: 1200px;
  --container-padding: 1rem;
  
  /* Z-index层级 */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-tooltip: 1050;
}

/* ==================== 基础样式重置 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition-fast);
}

ul {
  list-style: none;
}

/* ==================== 通用工具类 ==================== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==================== 按钮组件 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-add-cart {
  padding: 0.625rem 1.25rem;
  background: var(--primary-color);
  color: var(--text-white);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-base);
}

.btn-add-cart:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ==================== 导航栏 ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-fixed);
  transition: var(--transition-base);
}

.header.scroll-header {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.logo-icon {
  font-size: 1.75rem;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

.nav__actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav__search,
.nav__cart {
  font-size: 1.25rem;
  color: var(--text-secondary);
  background: transparent;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.nav__search:hover,
.nav__cart:hover {
  color: var(--primary-color);
  background: var(--bg-secondary);
}

.nav__cart {
  position: relative;
}

.cart-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--secondary-color);
  color: var(--text-white);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  width: 1.25rem;
  height: 1.25rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__toggle,
.nav__close {
  display: none;
}

/* ==================== 主视觉区域 - 轮播图 ==================== */
.hero-slider {
  position: relative;
  margin-top: 4.5rem;
  overflow: hidden;
}

.slider-container {
  position: relative;
  width: 100%;
  height: 600px;
  overflow: hidden;
}

.slider-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
  z-index: 1;
}

.slider-item.active {
  opacity: 1;
  visibility: visible;
  z-index: 2;
}

.slider-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.slider-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(0, 0, 0, 0.6) 0%,
    rgba(0, 0, 0, 0.3) 50%,
    rgba(0, 0, 0, 0.5) 100%
  );
  z-index: 1;
}

.slider-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: var(--container-max-width);
  padding: 0 var(--container-padding);
  text-align: center;
  z-index: 2;
  color: var(--text-white);
}

.slider-item.active .slider-content {
  /* 动画已移除 */
}

.slider-subtitle {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  color: var(--text-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.slider-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--text-white);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.slider-description {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 2.5rem;
  line-height: 1.8;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

.slider-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 轮播控制按钮 */
.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 3.5rem;
  height: 3.5rem;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  color: var(--text-white);
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-base);
  opacity: 0.8;
}

.slider-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  opacity: 1;
  transform: translateY(-50%) scale(1.1);
}

.slider-btn-prev {
  left: 2rem;
}

.slider-btn-next {
  right: 2rem;
}

/* 轮播指示器 */
.slider-indicators {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.75rem;
  z-index: 10;
}

.indicator {
  width: 2.5rem;
  height: 0.375rem;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
}

.indicator:hover {
  background: rgba(255, 255, 255, 0.6);
}

.indicator.active {
  background: var(--text-white);
  width: 3rem;
}

/* 统计数据 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 3rem var(--container-padding);
  background: var(--bg-secondary);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* ==================== 产品展示区 ==================== */
.products {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-subtitle {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  margin-bottom: 1rem;
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.product-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.product-card.featured {
  border: 2px solid var(--primary-color);
}

.product-card__badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.375rem 0.875rem;
  background: var(--primary-color);
  color: var(--text-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  z-index: 1;
}

.product-card__badge.hot {
  background: var(--secondary-color);
}

.product-card__image {
  height: 280px;
  overflow: hidden;
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-base);
}

.product-card:hover .product-image {
  transform: scale(1.05);
}

.product-card__content {
  padding: 1.5rem;
}

.product-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.product-card__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.product-card__specs {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.spec-item {
  padding: 0.375rem 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.product-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.product-card__price {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.price-current {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--secondary-color);
}

.price-original {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  text-decoration: line-through;
}

/* ==================== 特性展示区 ==================== */
.features {
  padding: 5rem 0;
  background: var(--bg-secondary);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card__icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.feature-card__description {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==================== 用户评价区 ==================== */
.reviews {
  padding: 5rem 0;
}

.reviews__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.review-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
}

.review-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.review-card__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.review-card__avatar {
  width: 3rem;
  height: 3rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.review-card__name {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.review-card__rating {
  font-size: var(--font-size-sm);
}

.review-card__content {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.review-card__date {
  font-size: var(--font-size-sm);
  color: var(--text-light);
}

/* ==================== 页脚 ==================== */
.footer {
  background: var(--bg-dark);
  color: var(--text-white);
  padding: 4rem 0 2rem;
}

.footer__content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer__description {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.footer__social {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 2.5rem;
  height: 2.5rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: var(--transition-base);
}

.social-link:hover {
  background: var(--primary-color);
  transform: translateY(-2px);
}

.footer__subtitle {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: 1.5rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer__links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
}

.footer__links a:hover {
  color: var(--primary-light);
  padding-left: 0.5rem;
}

.footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer__copyright {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-sm);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.icp-filing {
  display: inline-block;
}

.icp-filing a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: var(--transition-base);
}

.icp-filing a:hover {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: underline;
}

/* ==================== 页面头部 ==================== */
.page-header {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  text-align: center;
}

.page-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.page-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--primary-color);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* ==================== 产品页面样式 ==================== */
.product-filters {
  padding: 2rem 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

.filters-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.filter-label {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.filter-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: var(--text-white);
}

.filter-select {
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: var(--transition-base);
}

.filter-select:hover {
  border-color: var(--primary-color);
}

.products-section {
  padding: 3rem 0;
}

.product-card__wishlist {
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  z-index: 2;
  transition: var(--transition-base);
}

.product-card__wishlist:hover {
  background: var(--secondary-color);
  color: var(--text-white);
  transform: scale(1.1);
}

.product-card__rating {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.stars {
  font-size: var(--font-size-sm);
}

.rating-count {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

/* ==================== 特性页面样式 ==================== */
.features-main {
  padding: 3rem 0;
}

.feature-card-large {
  background: var(--bg-primary);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.feature-card-large:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.feature-card__icon-large {
  font-size: 4rem;
  margin-bottom: 1.5rem;
}

.feature-list {
  list-style: none;
  margin-top: 1.5rem;
}

.feature-list li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  font-size: var(--font-size-base);
}

.service-process {
  padding: 5rem 0;
  background: var(--bg-secondary);
}

.process-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.process-step {
  position: relative;
  text-align: center;
  flex: 0 0 200px;
}

.step-number {
  position: absolute;
  top: -10px;
  right: -10px;
  width: 2rem;
  height: 2rem;
  background: var(--primary-color);
  color: var(--text-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
}

.step-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.step-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.step-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.process-arrow {
  font-size: 2rem;
  color: var(--primary-color);
}

.payment-methods {
  padding: 5rem 0;
}

.payment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.payment-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.payment-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.payment-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.payment-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.payment-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.security-section {
  padding: 5rem 0;
  background: var(--bg-secondary);
}

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

.security-list {
  list-style: none;
  margin-top: 2rem;
}

.security-list li {
  display: flex;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-light);
}

.security-list li:last-child {
  border-bottom: none;
}

.security-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.security-list h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.security-list p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.security-placeholder {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-2xl);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.security-icon-large {
  font-size: 8rem;
  opacity: 0.9;
}

/* ==================== 评价页面样式 ==================== */
.review-stats {
  padding: 3rem 0;
  background: var(--bg-secondary);
}

.stats-wrapper {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 3rem;
  align-items: center;
}

.overall-rating {
  text-align: center;
}

.rating-number {
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.rating-stars {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.rating-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.rating-count {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.rating-breakdown {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rating-bar-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.rating-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  min-width: 3rem;
}

.rating-bar {
  flex: 1;
  height: 0.5rem;
  background: var(--border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.rating-bar-fill {
  height: 100%;
  background: var(--primary-color);
  transition: var(--transition-base);
}

.rating-percent {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  min-width: 3rem;
  text-align: right;
}

.satisfaction-stats {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.satisfaction-item {
  text-align: center;
}

.satisfaction-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.satisfaction-number {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.satisfaction-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.review-filters {
  padding: 2rem 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

.reviews-section {
  padding: 3rem 0;
}

.reviews-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.review-item {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.review-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.review-user {
  display: flex;
  gap: 1rem;
}

.review-avatar {
  width: 3rem;
  height: 3rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.review-username {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.review-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.review-rating {
  font-size: var(--font-size-sm);
}

.review-date {
  font-size: var(--font-size-sm);
  color: var(--text-light);
}

.verified-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.review-product {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.product-name {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.product-spec {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.review-content {
  margin-bottom: 1rem;
}

.review-content p {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: 1.8;
}

.review-images {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.review-image-placeholder {
  width: 100px;
  height: 100px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  cursor: pointer;
  transition: var(--transition-base);
}

.review-image-placeholder:hover {
  transform: scale(1.05);
}

.review-footer {
  display: flex;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

.review-action {
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  transition: var(--transition-base);
}

.review-action:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

.load-more {
  text-align: center;
  margin-top: 3rem;
}

/* ==================== 联系页面样式 ==================== */
.contact-info-section {
  padding: 3rem 0;
}

.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.contact-info-card {
  background: var(--bg-primary);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.contact-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.contact-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.contact-detail {
  font-size: var(--font-size-lg);
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
  margin-bottom: 0.5rem;
}

.contact-time {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.contact-form-section {
  padding: 5rem 0;
  background: var(--bg-secondary);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  padding: 0.875rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  transition: var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
}

.form-checkbox input {
  cursor: pointer;
}

.form-checkbox a {
  color: var(--primary-color);
}

.btn-submit {
  width: 100%;
  padding: 1rem;
  font-size: var(--font-size-lg);
}

.contact-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.faq-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.faq-list a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
}

.faq-list a:hover {
  color: var(--primary-color);
  padding-left: 0.5rem;
}

.sidebar-link {
  color: var(--primary-color);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.working-hours {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hours-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-light);
}

.hours-item:last-child {
  border-bottom: none;
}

.hours-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.hours-time {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.social-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.social-item:hover {
  background: var(--primary-color);
  color: var(--text-white);
}

.social-icon {
  font-size: 1.5rem;
}

.social-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.map-section {
  padding: 5rem 0;
}

.map-container {
  margin: 3rem 0;
}

.map-placeholder {
  height: 400px;
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.map-icon {
  font-size: 4rem;
}

.map-address {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.location-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.location-item {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.location-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.location-item h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.location-item p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* ==================== 购物车页面样式 ==================== */
.cart-section {
  padding: 3rem 0;
  min-height: 60vh;
}

.cart-wrapper {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 2rem;
}

.cart-main {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.cart-header {
  display: grid;
  grid-template-columns: 3fr 1fr 1fr 1fr 1fr;
  gap: 1rem;
  padding: 1.5rem 2rem;
  background: var(--bg-secondary);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.cart-items {
  display: flex;
  flex-direction: column;
}

.cart-item {
  display: grid;
  grid-template-columns: 3fr 1fr 1fr 1fr 1fr;
  gap: 1rem;
  padding: 2rem;
  border-bottom: 1px solid var(--border-light);
  align-items: center;
  transition: var(--transition-base);
}

.cart-item:hover {
  background: var(--bg-secondary);
}

.cart-col-product {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.cart-checkbox {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

.cart-product-image {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex-shrink: 0;
}

.cart-product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cart-product-info {
  flex: 1;
}

.cart-product-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.cart-product-spec {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.cart-product-tags {
  display: flex;
  gap: 0.5rem;
}

.tag {
  padding: 0.25rem 0.5rem;
  background: var(--primary-color);
  color: var(--text-white);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.tag.hot {
  background: var(--secondary-color);
}

.cart-price {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  display: block;
}

.cart-original-price {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  text-decoration: line-through;
  display: block;
  margin-top: 0.25rem;
}

.quantity-control {
  display: flex;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  width: fit-content;
}

.quantity-btn {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
}

.quantity-btn:hover {
  background: var(--primary-color);
  color: var(--text-white);
}

.quantity-input {
  width: 3rem;
  height: 2rem;
  text-align: center;
  border: none;
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  font-size: var(--font-size-base);
}

.cart-subtotal {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--secondary-color);
}

.cart-action-btn {
  padding: 0.5rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-base);
  font-size: 1.25rem;
}

.cart-action-btn:hover {
  color: var(--primary-color);
}

.cart-delete:hover {
  color: var(--secondary-color);
}

.cart-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: var(--bg-secondary);
}

.cart-footer-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.cart-footer-left label {
  font-weight: var(--font-weight-medium);
  cursor: pointer;
}

.cart-clear-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-base);
}

.cart-clear-btn:hover {
  border-color: var(--secondary-color);
  color: var(--secondary-color);
}

.cart-selected-count {
  color: var(--text-secondary);
}

.cart-selected-count strong {
  color: var(--primary-color);
  font-size: var(--font-size-lg);
}

.cart-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cart-sidebar-card {
  background: var(--bg-primary);
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.sidebar-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.coupon-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1rem;
}

.coupon-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--border-color);
}

.coupon-amount {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--secondary-color);
  flex-shrink: 0;
}

.coupon-info {
  flex: 1;
}

.coupon-name {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.coupon-desc {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.coupon-btn {
  padding: 0.5rem 1rem;
  background: var(--primary-color);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
}

.coupon-btn:hover {
  background: var(--primary-dark);
}

.more-coupons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-size: var(--font-size-sm);
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.more-coupons:hover {
  background: var(--bg-secondary);
}

.cart-summary {
  position: sticky;
  top: 5rem;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  color: var(--text-secondary);
}

.free-shipping {
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
}

.discount-amount {
  color: var(--secondary-color);
}

.summary-divider {
  height: 1px;
  background: var(--border-color);
  margin: 1rem 0;
}

.summary-total {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.total-amount {
  font-size: var(--font-size-2xl);
  color: var(--secondary-color);
}

.btn-checkout {
  width: 100%;
  margin-top: 1.5rem;
  padding: 1rem;
  font-size: var(--font-size-lg);
}

.summary-tips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.recommend-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.recommend-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
}

.recommend-item:hover {
  box-shadow: var(--shadow-md);
}

.recommend-image {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}

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

.recommend-info {
  flex: 1;
}

.recommend-info h4 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.recommend-price {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--secondary-color);
}

.recommend-add {
  width: 2rem;
  height: 2rem;
  background: var(--primary-color);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-base);
}

.recommend-add:hover {
  transform: scale(1.1);
}

.cart-empty {
  text-align: center;
  padding: 5rem 2rem;
}

.empty-icon {
  font-size: 6rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.empty-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.empty-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* ==================== 结算页面样式 ==================== */
.checkout-steps {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.step.active {
  color: var(--primary-color);
}

.step-number {
  width: 2rem;
  height: 2rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
}

.step.active .step-number {
  background: var(--primary-color);
  color: var(--text-white);
}

.step-line {
  width: 3rem;
  height: 2px;
  background: var(--border-color);
}

.back-to-cart {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.back-to-cart:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

.checkout-section {
  padding: 3rem 0;
  background: var(--bg-secondary);
}

.checkout-wrapper {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 2rem;
}

.checkout-main {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.checkout-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-add-address {
  padding: 0.5rem 1rem;
  background: var(--primary-color);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-base);
}

.btn-add-address:hover {
  background: var(--primary-dark);
}

.address-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.address-item {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition-base);
}

.address-item:hover {
  border-color: var(--primary-color);
}

.address-item.active {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.05);
}

.address-radio input {
  width: 1.25rem;
  height: 1.25rem;
}

.address-content {
  flex: 1;
}

.address-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.address-name {
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.address-phone {
  color: var(--text-secondary);
}

.address-tag {
  padding: 0.25rem 0.5rem;
  background: var(--secondary-color);
  color: var(--text-white);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.address-detail {
  color: var(--text-secondary);
  line-height: 1.6;
}

.address-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.address-action-btn {
  padding: 0.5rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  transition: var(--transition-base);
}

.address-action-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Address Form Styles */
.address-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.form-label .required {
  color: var(--secondary-color);
  font-weight: bold;
}

.form-input,
.form-select,
.form-textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: var(--transition-base);
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background: var(--bg-secondary);
  color: var(--text-tertiary);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary-color);
}

.checkout-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.checkout-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.checkout-item-image {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}

.checkout-product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.checkout-item-info {
  flex: 1;
}

.checkout-item-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.checkout-item-spec {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.checkout-item-price {
  text-align: right;
}

.item-price {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  display: block;
}

.item-quantity {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  display: block;
  margin-top: 0.25rem;
}

.shipping-methods {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.shipping-method {
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
}

.shipping-method:hover {
  border-color: var(--primary-color);
}

.shipping-method.active {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.05);
}

.shipping-method input {
  display: none;
}

.shipping-method label {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  cursor: pointer;
}

.method-icon {
  width: 3rem;
  height: 3rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.method-info {
  flex: 1;
}

.method-name {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.method-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.method-price {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
}

.payment-methods-checkout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.payment-method-item {
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
}

.payment-method-item:hover {
  border-color: var(--primary-color);
}

.payment-method-item.active {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.05);
}

.payment-method-item input {
  display: none;
}

.payment-method-item label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem;
  cursor: pointer;
}

.payment-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
}

.payment-name {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.invoice-options {
  display: flex;
  gap: 2rem;
}

.invoice-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.invoice-option input {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

.invoice-option label {
  cursor: pointer;
  color: var(--text-secondary);
}

.order-note {
  width: 100%;
  min-height: 100px;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  resize: vertical;
  transition: var(--transition-base);
}

.order-note:focus {
  outline: none;
  border-color: var(--primary-color);
}

.checkout-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.checkout-summary-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 5rem;
}

.summary-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.summary-coupon {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.coupon-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.coupon-select {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-base);
}

.coupon-select:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.summary-details {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
}

.free-text {
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
}

.discount-text {
  color: var(--secondary-color);
}

.summary-total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.total-price {
  font-size: var(--font-size-3xl);
  color: var(--secondary-color);
}

.btn-submit-order {
  width: 100%;
  padding: 1rem;
  margin-top: 1.5rem;
  font-size: var(--font-size-lg);
}

.security-tips {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-light);
}

.security-tip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.security-tip i {
  color: var(--primary-color);
}

.checkout-tips-card {
  background: var(--bg-primary);
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.tips-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tips-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tips-list li {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
}

.tips-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* ==================== 支付二维码弹窗 ==================== */
.qr-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10000;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.qr-modal.active {
  opacity: 1;
}

.qr-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.qr-modal-content {
  position: relative;
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: 2rem;
  max-width: 450px;
  width: 90%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  transform: scale(0.9);
  transition: transform 0.3s ease;
  z-index: 10001;
}

.qr-modal.active .qr-modal-content {
  transform: scale(1);
}

.qr-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border: none;
  background: var(--bg-secondary);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
  z-index: 10002;
}

.qr-modal-close:hover {
  background: var(--secondary-color);
  color: white;
  transform: rotate(90deg);
}

.qr-modal-header {
  text-align: center;
  margin-bottom: 2rem;
}

.qr-modal-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.qr-modal-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.qr-modal-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.qr-code-container {
  width: 250px;
  height: 250px;
  padding: 1rem;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-code-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-payment-info {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.payment-amount {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.amount-label {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
}

.amount-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--secondary-color);
}

.payment-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
  border-radius: var(--radius-lg);
  color: var(--primary-color);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
}

.payment-status i {
  font-size: 1.25rem;
}

.qr-modal-footer {
  margin-top: 1.5rem;
  text-align: center;
}

.qr-tips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.qr-tips i {
  color: var(--primary-color);
}

/* ==================== 返回顶部按钮 ==================== */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  background: var(--primary-color);
  color: var(--text-white);
  border-radius: var(--radius-full);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}

.scroll-top.show {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px);
}

/* ==================== 动画效果 ==================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ==================== 响应式设计 ==================== */

/* 平板设备 (768px - 1023px) */
@media screen and (max-width: 1023px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }

  .slider-container {
    height: 500px;
  }

  .slider-title {
    font-size: var(--font-size-4xl);
  }

  .slider-description {
    font-size: var(--font-size-lg);
  }

  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    padding: 2rem var(--container-padding);
  }

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

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

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

  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .process-arrow {
    display: none;
  }
}

/* 移动设备 (最大 767px) */
@media screen and (max-width: 767px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --container-padding: 1.5rem;
  }

  /* 导航栏移动端 */
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background: var(--bg-primary);
    padding: 4rem 2rem;
    box-shadow: var(--shadow-xl);
    transition: var(--transition-base);
    z-index: var(--z-fixed);
  }

  .nav__menu.show-menu {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    gap: 2rem;
    align-items: flex-start;
  }

  .nav__close {
    display: block;
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 2rem;
    color: var(--text-primary);
    cursor: pointer;
  }

  .nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    cursor: pointer;
  }

  .nav__toggle span {
    width: 1.5rem;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
  }

  .logo-text {
    display: none;
  }

  /* 主视觉区域移动端 */
  .slider-container {
    height: 500px;
  }

  .slider-title {
    font-size: var(--font-size-3xl);
  }

  .slider-description {
    font-size: var(--font-size-base);
    margin-bottom: 2rem;
  }

  .slider-buttons {
    flex-direction: column;
    align-items: center;
  }

  .slider-buttons .btn {
    width: 100%;
    max-width: 300px;
  }

  .slider-btn {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.5rem;
  }

  .slider-btn-prev {
    left: 1rem;
  }

  .slider-btn-next {
    right: 1rem;
  }

  .slider-indicators {
    bottom: 1rem;
    gap: 0.5rem;
  }

  .indicator {
    width: 2rem;
    height: 0.25rem;
  }

  .indicator.active {
    width: 2.5rem;
  }

  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 2rem var(--container-padding);
  }

  .stat-number {
    font-size: var(--font-size-2xl);
  }

  /* 产品展示区移动端 */
  .products {
    padding: 3rem 0;
  }

  .section-header {
    margin-bottom: 2rem;
  }

  .products__grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* 特性展示区移动端 */
  .features {
    padding: 3rem 0;
  }

  .features__grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* 用户评价区移动端 */
  .reviews {
    padding: 3rem 0;
  }

  .reviews__grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* 页脚移动端 */
  .footer {
    padding: 3rem 0 1.5rem;
  }

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

  .scroll-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.25rem;
  }

  .page-header {
    padding: 6rem 0 3rem;
  }

  .page-title {
    font-size: var(--font-size-3xl);
  }

  .filters-wrapper {
    flex-direction: column;
    align-items: flex-start;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-sidebar {
    order: -1;
  }

  .process-steps {
    flex-direction: column;
  }

  .location-info {
    grid-template-columns: 1fr;
  }

  .cart-wrapper,
  .checkout-wrapper {
    grid-template-columns: 1fr;
  }

  .cart-header {
    display: none;
  }

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

  .cart-col-product {
    flex-direction: column;
    align-items: flex-start;
  }

  .cart-product-image {
    width: 100%;
    height: 200px;
  }

  .cart-footer {
    flex-direction: column;
    gap: 1rem;
  }

  .checkout-steps {
    display: none;
  }

  .payment-methods-checkout {
    grid-template-columns: 1fr;
  }
}

/* 小屏幕移动设备 (最大 374px) */
@media screen and (max-width: 374px) {
  :root {
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
  }

  .slider-container {
    height: 450px;
  }

  .slider-title {
    font-size: var(--font-size-2xl);
  }

  .slider-subtitle {
    font-size: var(--font-size-xs);
    padding: 0.375rem 1rem;
  }

  .slider-description {
    font-size: var(--font-size-sm);
  }

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

/* 大屏幕优化 (1440px+) */
@media screen and (min-width: 1440px) {
  :root {
    --container-max-width: 1320px;
  }
}

/* 打印样式 */
@media print {
  .header,
  .nav__actions,
  .scroll-top,
  .hero__buttons {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-light: #9ca3af;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --border-color: #374151;
    --border-light: #2d3748;
  }

  .header {
    background: rgba(17, 24, 39, 0.95);
  }

  .product-card,
  .feature-card,
  .review-card {
    background: var(--bg-secondary);
  }
}

/* 减少动画（可访问性） */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}