/*!
 * 黑龙江远东心脑血管医院官网样式
 * 现代医疗专业风格 | 响应式设计
 */

/* ==========================================================================
   CSS变量定义 - 医疗主题配色
   ========================================================================== */
:root {
  /* 主色调 - 医疗蓝 */
  --primary-color: #1a6fc4;
  --primary-dark: #125a9e;
  --primary-light: #e8f4fc;
  
  /* 辅助色 */
  --secondary-color: #00a8a8;
  --accent-color: #ff6b35;
  
  /* 中性色 */
  --text-dark: #333333;
  --text-medium: #666666;
  --text-light: #999999;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --border-color: #e0e0e0;
  
  /* 功能色 */
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  
  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  
  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* ==========================================================================
   基础重置和通用样式
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--primary-dark);
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   布局容器
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* 响应式断点 */
@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

/* ==========================================================================
   导航栏
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}

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

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

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

.logo img {
  height: 45px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--text-light);
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-dark);
  padding: var(--spacing-sm) 0;
  position: relative;
}

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

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

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

/* 汉堡菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-sm);
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: all var(--transition-fast);
}

/* 紧急电话按钮 */
.emergency-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--accent-color);
  color: var(--bg-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
}

.emergency-btn:hover {
  background: #e55a2b;
  color: var(--bg-white);
}

.emergency-btn svg {
  width: 16px;
  height: 16px;
}

/* 移动端导航 */
@media (max-width: 991px) {
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .emergency-btn span {
    display: none;
  }
}

/* ==========================================================================
   Hero区域
   ========================================================================== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  margin-top: 70px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../img/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.1;
}

.hero-image {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 100%;
  z-index: 0;
  overflow: hidden;
}

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

.hero-image-gradient {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to left, transparent 0%, rgba(26, 111, 196, 1) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--bg-white);
  padding: var(--spacing-xxl) 0;
  max-width: 600px;
}

@media (max-width: 991px) {
  .hero-image {
    width: 40%;
  }
  
  .hero-content {
    max-width: 60%;
  }
}

@media (max-width: 767px) {
  .hero-image {
    display: none;
  }
  
  .hero-content {
    max-width: 100%;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(255,255,255,0.15);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
  backdrop-filter: blur(10px);
}

.hero-badge svg {
  width: 16px;
  height: 16px;
  color: #4ade80;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9375rem;
}

.hero-feature svg {
  width: 18px;
  height: 18px;
  color: #4ade80;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--bg-white);
  color: var(--primary-color);
}

.btn-primary:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--bg-white);
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--bg-white);
  color: var(--bg-white);
}

.btn svg {
  width: 18px;
  height: 18px;
}

@media (max-width: 767px) {
  .hero {
    min-height: 500px;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}

/* ==========================================================================
   区块通用样式
   ========================================================================== */
.section {
  padding: var(--spacing-xxl) 0;
}

.section-alt {
  background: var(--bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.section-label {
  display: inline-block;
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-medium);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 767px) {
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
}

/* ==========================================================================
   资质荣誉
   ========================================================================== */
.certificates {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
}

.certificate-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.certificate-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.certificate-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
}

.certificate-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary-color);
}

.certificate-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-dark);
}

/* ==========================================================================
   科室卡片
   ========================================================================== */
.departments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.dept-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.dept-card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--bg-white);
}

.dept-icon {
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.dept-icon svg {
  width: 24px;
  height: 24px;
}

.dept-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.dept-card-body {
  padding: var(--spacing-lg);
}

.dept-desc {
  font-size: 0.9375rem;
  color: var(--text-medium);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.dept-services {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.dept-service-tag {
  font-size: 0.8125rem;
  color: var(--primary-color);
  background: var(--primary-light);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.dept-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary-color);
}

.dept-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.dept-link:hover svg {
  transform: translateX(4px);
}

/* ==========================================================================
   专家团队
   ========================================================================== */
.doctors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.doctor-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.doctor-avatar {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--bg-light);
}

.doctor-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.doctor-card:hover .doctor-avatar img {
  transform: scale(1.05);
}

.doctor-badge {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: var(--accent-color);
  color: var(--bg-white);
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.doctor-info {
  padding: var(--spacing-lg);
}

.doctor-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
}

.doctor-title {
  font-size: 0.9375rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.doctor-specialty {
  font-size: 0.875rem;
  color: var(--text-medium);
  line-height: 1.5;
  margin-bottom: var(--spacing-md);
}

.doctor-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary-color);
}

/* ==========================================================================
   设备展示
   ========================================================================== */
.equipment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.equipment-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.equipment-image {
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.equipment-image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.equipment-info {
  padding: var(--spacing-lg);
}

.equipment-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
}

.equipment-brand {
  font-size: 0.875rem;
  color: var(--text-light);
}

/* ==========================================================================
   快捷入口
   ========================================================================== */
.quick-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.quick-link-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.quick-link-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: var(--primary-color);
}

.quick-link-card:hover .quick-link-icon {
  background: rgba(255,255,255,0.2);
}

.quick-link-card:hover .quick-link-title,
.quick-link-card:hover .quick-link-desc {
  color: var(--bg-white);
}

.quick-link-icon {
  width: 70px;
  height: 70px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-normal);
}

.quick-link-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary-color);
  transition: all var(--transition-normal);
}

.quick-link-card:hover .quick-link-icon svg {
  color: var(--bg-white);
}

.quick-link-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
  transition: color var(--transition-normal);
}

.quick-link-desc {
  font-size: 0.875rem;
  color: var(--text-medium);
  transition: color var(--transition-normal);
}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  background: #1a2332;
  color: var(--bg-white);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.footer-desc {
  font-size: 0.9375rem;
  opacity: 0.8;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.footer-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  color: rgba(255,255,255,0.8);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--bg-white);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.contact-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  opacity: 0.8;
}

.contact-text {
  font-size: 0.9375rem;
  opacity: 0.9;
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-lg);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-copyright {
  font-size: 0.875rem;
  opacity: 0.7;
}

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

.footer-legal a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

.footer-legal a:hover {
  color: var(--bg-white);
}

@media (max-width: 767px) {
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   悬浮按钮
   ========================================================================== */
.floating-buttons {
  position: fixed;
  right: var(--spacing-md);
  bottom: var(--spacing-md);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.floating-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.floating-btn:hover {
  transform: scale(1.1);
}

.floating-btn svg {
  width: 24px;
  height: 24px;
}

.floating-btn-phone {
  background: var(--accent-color);
  color: var(--bg-white);
}

.floating-btn-wechat {
  background: #07c160;
  color: var(--bg-white);
}

.floating-btn-top {
  background: var(--bg-white);
  color: var(--text-dark);
  border: 1px solid var(--border-color);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.floating-btn-top.visible {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   面包屑导航
   ========================================================================== */
.breadcrumb {
  background: var(--bg-light);
  padding: var(--spacing-md) 0;
  margin-top: 70px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.breadcrumb-item a {
  color: var(--text-medium);
}

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

.breadcrumb-item.active {
  color: var(--text-dark);
  font-weight: 500;
}

.breadcrumb-separator {
  color: var(--text-light);
}

/* ==========================================================================
   页面内容区
   ========================================================================== */
.page-content {
  padding: var(--spacing-xxl) 0;
}

.page-header {
  margin-bottom: var(--spacing-xl);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--text-medium);
}

/* 文章样式 */
.article-content {
  max-width: 800px;
  margin: 0 auto;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: var(--spacing-xl) 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--primary-light);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.article-content p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-medium);
  margin-bottom: var(--spacing-md);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-medium);
  margin-bottom: var(--spacing-xs);
}

/* ==========================================================================
   辅助类
   ========================================================================== */
.text-center {
  text-align: center;
}

.text-primary {
  color: var(--primary-color);
}

.text-accent {
  color: var(--accent-color);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

/* 隐藏类 */
.hidden {
  display: none !important;
}

@media (max-width: 767px) {
  .hidden-mobile {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .hidden-desktop {
    display: none !important;
  }
}