:root {
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --primary-bg: #eff6ff;
    --secondary: #64748b;
    --dark: #0f172a;
    --light: #f8fafc;
    --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;
    --shadow: 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);
    --card-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.1), 0 10px 10px -5px rgba(59, 130, 246, 0.04);
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition: all 0.3s ease;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
  }
  
  body {
    background-color: var(--gray-50);
    color: var(--gray-800);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
  }
  
  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
  }
  
  button {
    cursor: pointer;
    border: none;
    transition: var(--transition);
  }
  
  /* 导航栏 - 优化抖动问题 */
  header {
    background-color: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px; /* 固定高度，防止抖动 */
    transition: box-shadow 0.3s ease;
  }
  
  .navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    height: 100%;
    transition: transform 0.3s ease;
  }
  
  /* 滚动时导航栏效果 - 优化版 */
  header.scrolled .navbar {
    transform: translateY(-4px);
  }
  
  header.scrolled {
    box-shadow: var(--shadow-lg);
  }
  
  .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .logo i {
    color: var(--primary);
    font-size: 1.5rem;
  }
  
  .logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, #2dd4bf 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  .nav-links {
    display: none;
    gap: 1.5rem;
    align-items: center;
  }
  
  .nav-links a {
    color: var(--gray-600);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
  }
  
  .nav-links a:hover {
    color: var(--primary);
  }
  
  .menu-toggle {
    display: block;
    background: none;
    color: var(--gray-600);
    font-size: 1.25rem;
  }
  
  .mobile-menu {
    display: none;
    background-color: white;
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
  }
  
  .mobile-menu.active {
    display: block;
  }
  
  .mobile-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .mobile-links a {
    color: var(--gray-600);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-100);
  }
  
  .mobile-links a:hover {
    color: var(--primary);
  }
  
  /* 主要内容 */
  main {
    flex: 1;
    padding: 0 0 2rem;
  }
  
  /* 英雄区域 */
  .hero {
    text-align: center;
    padding: 2rem 0;
  }
  
  .hero h2 {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, #2dd4bf 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  .hero p {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 1.5rem auto 0.5rem;
  }
  
  /* 查询表单 */
  .query-form {
    max-width: 700px;
    margin: 1rem auto;
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    transition: var(--transition);
  }
  
  .query-form:hover {
    transform: scale(1.02);
  }
  
  .form-group {
    display: flex;
    gap: 0;
  }
  
  .query-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
    font-size: 1rem;
    transition: var(--transition);
  }
  
  .query-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  }
  
  .query-btn {
    background-color: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .query-btn:hover {
    background-color: var(--primary-dark);
  }
  
  .form-hint {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--gray-500);
    text-align: left;
  }
  

  .more-info{
    color: blue;
    text-align: center;
    padding-bottom: 20px;
  }
  

  
  .info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: var(--gray-50);
    padding: 0.25rem 0.2rem;
    border-radius: var(--radius-lg);
  }
  
  .info-item i {
    color: var(--primary);
    font-size: 1.25rem;
    width: 2rem;
    text-align: center;
  }
  
  .info-content {
    flex: 1;
  }
  
  .info-label {
    font-size: 0.75rem;
    /* color: var(--gray-500); */
    margin-bottom: 0.25rem;
    background: linear-gradient(135deg, var(--primary) 0%, #2dd4bf 100%);
    background-clip: text;
    color: transparent;
    font-weight: 600;
  }
  
  .info-value {
    font-weight: 500;
    color: var(--gray-800);
  }
  
  /* 查询结果区域 */
  .result-section {
    /* max-width: 800px; */
    margin: 0 auto 4rem;
    /* display: none; */
  }
  
  .result-card {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    overflow: hidden;
  }
  
  .result-header {
    background: linear-gradient(135deg, var(--primary) 0%, #2dd4bf 100%);
    color: white;
    padding: 1.5rem;
  }
  
  .result-title {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
  }
  
  .result-ip {
    font-size: 1.5rem;
    opacity: 0.9;
  }
  
  .result-content {
    padding: 1.5rem;
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1rem;
  }
  
  @media (min-width: 640px) {
    .result-content {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  .result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: var(--gray-50);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
  }
  
  .result-item i {
    color: var(--primary);
    font-size: 1.25rem;
    width: 2rem;
    text-align: center;
  }
  
  .address-info {
    grid-column: 1 / -1;
    background-color: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 1rem;
    margin-top: 0.5rem;
  }
  
  .address-title {
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--gray-800);
  }
  
  .address-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 0.75rem;
  }
  
  @media (min-width: 640px) {
    .address-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  .address-item {
    display: flex;
    gap: 0.75rem;
  }
  
  .address-item i {
    color: var(--primary);
    font-size: 1rem;
    margin-top: 0.25rem;
    width: 1.25rem;
    text-align: center;
  }
  
  .address-content {
    flex: 1;
  }
  
  .address-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-bottom: 0.125rem;
  }
  
  .address-value {
    font-weight: 500;
    color: var(--gray-800);
  }
  
  .map-link {
    color: var(--primary);
    font-weight: 500;
    text-decoration: underline;
    font-size: 0.875rem;
    margin-left: 0.5rem;
  }
  
  .loading {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    padding: 2rem 0;
  }
  
  .spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid rgba(59, 130, 246, 0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }
  
  @keyframes spin {
    to {
      transform: rotate(360deg);
    }
  }
  
  .error {
    grid-column: 1 / -1;
    background-color: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #dc2626;
    padding: 1rem;
    border-radius: var(--radius-lg);
  }
  
  /* 功能特点 */
  .features {
    margin-bottom: 4rem;
    padding: 2rem 0;
  }
  
  .section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--primary) 0%, #2dd4bf 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  .features-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1.5rem;
  }
  
  @media (min-width: 640px) {
    .features-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (min-width: 1024px) {
    .features-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  .feature-card {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: var(--transition);
  }
  
  .feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
  }
  
  .feature-icon {
    width: 3rem;
    height: 3rem;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
  }
  
  .feature-icon i {
    color: var(--primary);
    font-size: 1.5rem;
  }
  
  .feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--gray-800);
  }
  
  .feature-desc {
    color: var(--gray-600);
    font-size: 0.9375rem;
  }
  
  /* 使用方法 */
  .how-it-works {
    /* max-width: 700px; */
    margin: 0 auto 4rem;
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    padding: 2rem;
  }
  
  .how-it-works h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--gray-800);
  }
  
  .steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .step {
    display: flex;
    gap: 1rem;
  }
  
  .step-number {
    width: 2.5rem;
    height: 2.5rem;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
  }
  
  .step-content {
    flex: 1;
  }
  
  .step-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-800);
  }
  
  .step-desc {
    color: var(--gray-600);
    font-size: 0.9375rem;
  }
  
  /* 常见问题 */
  .faq {
    margin-bottom: 4rem;
    padding: 2rem 0;
  }
  
  .faq-grid {
    /* max-width: 700px; */
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .faq-item {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
  }
  
  .faq-question {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--gray-800);
  }
  
  .faq-answer {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
  }
  
  /* 用户评价 - 优化为三个 */
  .testimonials {
    margin-bottom: 4rem;
    padding: 3rem 0;
    background-color: rgba(59, 130, 246, 0.05);
    border-radius: 2rem;
  }
  
  .testimonials-grid {
    max-width: 1100px; /* 增加最大宽度以容纳三个评论 */
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1.5rem;
  }
  
  @media (min-width: 640px) {
    .testimonials-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (min-width: 1024px) {
    .testimonials-grid {
      grid-template-columns: repeat(3, 1fr); /* 桌面端显示三个 */
    }
  }
  
  .testimonial-card {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    transition: var(--transition);
  }
  
  .testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
  }
  
  .testimonial-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
  }
  
  .testimonial-avatar {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    object-fit: cover;
  }
  
  .testimonial-name {
    font-weight: 600;
    color: var(--gray-800);
  }
  
  .testimonial-role {
    font-size: 0.875rem;
    color: var(--gray-500);
  }
  
  .testimonial-stars {
    margin-bottom: 0.75rem;
    color: #f59e0b;
  }
  
  .testimonial-text {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
  }
  
  /* 关于部分 */
  .about {
    /* max-width: 700px; */
    margin: 0 auto 4rem;
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    padding: 2rem;
  }
  
  .about h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--gray-800);
  }
  
  .about-text {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
  }
  
  .about-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .btn-primary {
    background-color: var(--primary);
    color: white;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .btn-primary:hover {
    background-color: var(--primary-dark);
  }
  
  .btn-secondary {
    background-color: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .btn-secondary:hover {
    background-color: var(--gray-50);
  }
  
  /* 页脚 */
  footer {
    background-color: var(--dark);
    color: white;
    padding: 3rem 0 1.5rem;
  }
  
  .footer-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
  }
  
  @media (min-width: 640px) {
    .footer-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (min-width: 1024px) {
    .footer-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  .footer-col {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
  }
  
  .footer-logo i {
    color: var(--primary);
    font-size: 1.5rem;
  }
  
  .footer-logo h2 {
    font-size: 1.25rem;
    font-weight: 700;
  }
  
  .footer-desc {
    color: var(--gray-400);
    font-size: 0.875rem;
    line-height: 1.5;
  }
  
  .footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
  }
  
  .footer-social a {
    color: var(--gray-400);
    font-size: 1.25rem;
  }
  
  .footer-social a:hover {
    color: white;
  }
  
  .footer-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
  }
  
  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .footer-links a {
    color: var(--gray-400);
    font-size: 0.875rem;
  }
  
  .footer-links a:hover {
    color: white;
  }
  
  .footer-contact {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray-400);
    font-size: 0.875rem;
  }
  
  .footer-contact i {
    color: var(--primary);
    width: 1.25rem;
    text-align: center;
  }
  
  .footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }
  
  @media (min-width: 640px) {
    .footer-bottom {
      flex-direction: row;
      justify-content: space-between;
    }
  }
  
  .copyright {
    color: var(--gray-400);
    font-size: 0.875rem;
  }
  
  .footer-bottom-links {
    display: flex;
    gap: 1.5rem;
  }
  
  .footer-bottom-links a {
    color: var(--gray-400);
    font-size: 0.875rem;
  }
  
  .footer-bottom-links a:hover {
    color: white;
  }
  
  /* 响应式调整 */
  @media (min-width: 768px) {
    .nav-links {
      display: flex;
    }
    
    .menu-toggle {
      display: none;
    }
    
    .navbar {
      padding: 1rem 1rem;
    }
    
    .logo h1 {
      font-size: 1.5rem;
    }
  }
  
  @media (min-width: 1024px) {
    .container {
      padding: 0 2rem;
    }
    
    .hero h2 {
      font-size: clamp(2rem, 5vw, 3rem);
    }
  }