/* Smart RentHub - 全局样式 */

:root {
    /* 品牌主要色彩 */
    --primary-color: #2563eb; /* 蓝色 - 主品牌色 */
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;

    /* 辅助色彩 */
    --accent-color: #8b5cf6; /* 紫色 - 辅助色 */
    --success-color: #10b981; /* 绿色 - 成功/确认色 */
    --warning-color: #f59e0b; /* 橙色 - 警告色 */
    --danger-color: #ef4444; /* 红色 - 错误/删除色 */

    /* 灰度色阶 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* 字体 */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-heading: var(--font-primary);

    /* 字体大小 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    /* 间距 */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;

    /* 边框圆角 */
    --radius-sm: 0.125rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* 过渡 */
    --transition-fast: 150ms;
    --transition-normal: 300ms;
    --transition-slow: 500ms;
  }

  /* 基础样式重置与默认样式 */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-primary);
    color: var(--gray-800);
    background-color: var(--gray-50);
    line-height: 1.5;
    overflow-x: hidden;
  }

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

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

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

  /* 全局通用组件样式 */

  /* 按钮 */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    text-align: center;
  }

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

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

  .btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
  }

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

  .btn-secondary {
    background-color: var(--gray-200);
    color: var(--gray-800);
  }

  .btn-secondary:hover {
    background-color: var(--gray-300);
  }

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

  .btn-accent:hover {
    background-color: #7c3aed; /* 深紫色 */
  }

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

  .btn-success:hover {
    background-color: #059669;
  }

  .btn-rounded {
    border-radius: var(--radius-full);
  }

  .btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: var(--text-sm);
  }

  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--text-lg);
  }

  /* 英雄区域按钮 */
  .hero-btn-outline {
    border: 2px solid white;
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }

  .hero-btn-outline:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 10px rgba(0, 0, 0, 0.15);
  }

  /* 卡片 */
  .card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
  }

  /* 表单元素 */
  .form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--gray-700);
    background-color: white;
    background-clip: padding-box;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  }

  .form-control:focus {
    border-color: var(--primary-light);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
  }

  .form-label {
    display: inline-block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
  }

  .form-group {
    margin-bottom: 1.5rem;
  }

  /* 常用工具类 */
  .text-center {
    text-align: center;
  }

  .text-right {
    text-align: right;
  }

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

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

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

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

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

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

  .bg-accent {
    background-color: var(--accent-color);
  }

  .bg-success {
    background-color: var(--success-color);
  }

  .bg-warning {
    background-color: var(--warning-color);
  }

  .bg-danger {
    background-color: var(--danger-color);
  }

  .mt-1 { margin-top: var(--spacing-1); }
  .mt-2 { margin-top: var(--spacing-2); }
  .mt-4 { margin-top: var(--spacing-4); }
  .mt-8 { margin-top: var(--spacing-8); }

  .mb-1 { margin-bottom: var(--spacing-1); }
  .mb-2 { margin-bottom: var(--spacing-2); }
  .mb-4 { margin-bottom: var(--spacing-4); }
  .mb-8 { margin-bottom: var(--spacing-8); }

  .my-1 { margin-top: var(--spacing-1); margin-bottom: var(--spacing-1); }
  .my-2 { margin-top: var(--spacing-2); margin-bottom: var(--spacing-2); }
  .my-4 { margin-top: var(--spacing-4); margin-bottom: var(--spacing-4); }
  .my-8 { margin-top: var(--spacing-8); margin-bottom: var(--spacing-8); }

  .p-1 { padding: var(--spacing-1); }
  .p-2 { padding: var(--spacing-2); }
  .p-4 { padding: var(--spacing-4); }
  .p-8 { padding: var(--spacing-8); }

  .py-1 { padding-top: var(--spacing-1); padding-bottom: var(--spacing-1); }
  .py-2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); }
  .py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
  .py-8 { padding-top: var(--spacing-8); padding-bottom: var(--spacing-8); }

  .px-1 { padding-left: var(--spacing-1); padding-right: var(--spacing-1); }
  .px-2 { padding-left: var(--spacing-2); padding-right: var(--spacing-2); }
  .px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
  .px-8 { padding-left: var(--spacing-8); padding-right: var(--spacing-8); }

  /* 动画 */
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes slideInUp {
    from {
      transform: translateY(20px);
      opacity: 0;
    }
    to {
      transform: translateY(0);
      opacity: 1;
    }
  }

  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
  }

  .animate-fadeIn {
    animation: fadeIn var(--transition-normal) ease-in forwards;
  }

  .animate-slideInUp {
    animation: slideInUp var(--transition-normal) ease-out forwards;
  }

  .animate-pulse {
    animation: pulse 2s infinite;
  }

  /* 延迟动画 */
  .delay-100 { animation-delay: 100ms; }
  .delay-200 { animation-delay: 200ms; }
  .delay-300 { animation-delay: 300ms; }
  .delay-400 { animation-delay: 400ms; }
  .delay-500 { animation-delay: 500ms; }

  /* 响应式工具 */
  .hidden-xs {
    display: none;
  }

  @media (min-width: 640px) {
    .hidden-xs {
      display: block;
    }

    .hidden-sm {
      display: none;
    }
  }

  @media (min-width: 768px) {
    .hidden-sm {
      display: block;
    }

    .hidden-md {
      display: none;
    }
  }

  @media (min-width: 1024px) {
    .hidden-md {
      display: block;
    }

    .hidden-lg {
      display: none;
    }
  }

  @media (min-width: 1280px) {
    .hidden-lg {
      display: block;
    }

    .hidden-xl {
      display: none;
    }
  }

  /* 导航栏和页脚组件样式 */

  /* 通用导航栏 */
  .navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background-color: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
  }

  .navbar-brand {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--gray-900);
  }

  .navbar-brand a {
    display: flex;
    align-items: center;
    color: inherit;
    text-decoration: none;
  }

  .navbar-brand img {
    margin-right: 0.5rem;
  }

  .navbar-links {
    display: none;
  }

  .navbar-mobile-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--gray-700);
    font-size: var(--text-xl);
    cursor: pointer;
  }

  /* 语言切换器 */
  .language-switcher {
    position: relative;
    display: flex;
    align-items: center;
    margin-left: 1rem;
  }

  .language-buttons {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .language-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    background: none;
    cursor: pointer;
    font-size: var(--text-sm);
  }

  .language-btn:hover, .language-btn.active {
    background-color: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-color);
  }

  .language-btn.active {
    font-weight: 600;
  }

  .footer-lang-btn {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    transition: color 0.3s ease;
    font-size: var(--text-sm);
  }

  .footer-lang-btn:hover, .footer-lang-btn.active {
    color: white;
  }

  .footer-lang-btn.active {
    font-weight: 600;
  }

  .footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--gray-800);
  }

  @media (min-width: 768px) {
    .footer-bottom {
      flex-direction: row;
    }
  }

  @media (min-width: 768px) {
    .navbar-links {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }

    .navbar-mobile-toggle {
      display: none;
    }

    .navbar-link {
      color: var(--gray-700);
      font-weight: 500;
      transition: color var(--transition-normal);
      position: relative;
    }

    .navbar-link:hover {
      color: var(--primary-color);
    }

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

    .navbar-link.active::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary-color);
    }

    .navbar-auth {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
  }

  /* 移动导航菜单 */
  .mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 300px;
    height: 100vh;
    background-color: white;
    box-shadow: var(--shadow-xl);
    z-index: 60;
    padding: 2rem;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
  }

  .mobile-menu.active {
    transform: translateX(0);
  }

  .mobile-menu-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--gray-700);
    font-size: var(--text-xl);
    cursor: pointer;
  }

  .mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
  }

  .mobile-menu-link {
    color: var(--gray-800);
    font-weight: 500;
    font-size: var(--text-lg);
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: 0.5rem;
  }

  .mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 55;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  /* 页脚 */
  .footer {
    background-color: var(--gray-900);
    color: var(--gray-300);
    padding: 4rem 0 2rem;
  }

  .footer-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-logo {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
  }

  .footer-description {
    margin-bottom: 1.5rem;
    line-height: 1.6;
  }

  .footer-social {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .footer-social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--gray-800);
    color: var(--gray-200);
    transition: all var(--transition-normal);
  }

  .footer-social-icon:hover {
    background-color: var(--primary-color);
    color: white;
  }

  .footer-heading {
    font-size: var(--text-lg);
    font-weight: 600;
    color: white;
    margin-bottom: 1.25rem;
  }

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

  .footer-link {
    color: var(--gray-400);
    transition: color var(--transition-normal);
  }

  .footer-link:hover {
    color: white;
  }

  .footer-copyright {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--gray-500);
  }

  /* 页脚语言切换器 */
  .footer-language {
    margin-bottom: 1.5rem;
  }

  @media (min-width: 768px) {
    .footer-container {
      grid-template-columns: 2fr 1fr 1fr;
    }

    .footer-language {
      margin-bottom: 0;
    }
  }

  @media (min-width: 1024px) {
    .footer-container {
      grid-template-columns: 2fr 1fr 1fr 1fr;
    }
  }

  /* FAQ 样式 */
  .faq-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
  }

  .faq-item.active {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
  }

  .faq-header {
    padding: 1.25rem;
    background-color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
  }

  .faq-header i {
    transition: transform 0.3s ease;
  }

  .faq-item.active .faq-header i {
    transform: rotate(180deg);
  }

  .faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: var(--gray-50);
    padding: 0 1.25rem;
  }

  .faq-item.active .faq-content {
    padding: 1.25rem;
    border-top: 1px solid var(--gray-200);
  }

     /* Call to Action Section Styles */
     .cta-section {
        padding: 5rem 0;
        background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
        color: white;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before,
    .cta-section::after {
        content: '';
        position: absolute;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.1);
        z-index: 0;
    }

    .cta-section::before {
        top: -150px;
        left: -100px;
    }

    .cta-section::after {
        bottom: -150px;
        right: -100px;
    }

    .cta-content {
        position: relative;
        z-index: 1;
        max-width: 1000px;
        margin: 0 auto;
    }

    .cta-content h2 {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 1rem;
    }

    .cta-content p {
        font-size: 1.25rem;
        opacity: 0.9;
        margin-bottom: 2rem;
    }

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

    .cta-buttons .btn-outline {
        border-color: white;
        color: white;
    }

    .cta-buttons .btn-outline:hover {
        background-color: white;
        color: var(--primary-color);
    }

    .hero-action {
        background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
        color: white;
        padding: 80px 0;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .hero-action::before,
    .hero-action::after {
        content: '';
        position: absolute;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.1);
        z-index: 0;
    }

    .hero-action::before {
        top: -100px;
        left: -100px;
    }

    .hero-action::after {
        bottom: -100px;
        right: -100px;
    }

    .hero-action h1 {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 1rem;
        position: relative;
        z-index: 1;
    }

    .hero-action .subtitle {
        font-size: 1.25rem;
        max-width: 700px;
        margin: 0 auto 2rem;
        opacity: 0.9;
        position: relative;
        z-index: 1;
    }