/* 添加基础动画 */
    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

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

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

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

    @keyframes scaleIn {
      from {
        opacity: 0;
        transform: scale(0.95);
      }
      to {
        opacity: 1;
        transform: scale(1);
      }
    }

    /* 应用动画到具体元素 */
    .logo {
      animation: fadeIn 0.8s ease;
    }

    .nav-links, .nav-buttons {
      animation: fadeIn 0.8s ease 0.2s both;
    }

    .hero h2 {
      animation: slideUp 0.8s ease 0.3s both;
    }

    .hero p {
      animation: slideUp 0.8s ease 0.5s both;
    }

    .hero-buttons {
      animation: slideUp 0.8s ease 0.7s both;
    }

    .hero-image {
      animation: scaleIn 1.2s ease 0.8s both;
    }

    .feature-card {
      animation: slideUp 0.8s ease both;
      animation-play-state: paused; /* 暂停动画，直到元素进入视口 */
    }

    .client-card {
      animation: slideUp 0.8s ease both;
      animation-play-state: paused; /* 暂停动画，直到元素进入视口 */
    }

    .cta-container {
      animation: scaleIn 0.8s ease both;
      animation-play-state: paused; /* 暂停动画，直到元素进入视口 */
    }

    :root {
      --primary-color: #7b4b27;           /* 咖啡棕 */
      --primary-color-light: #b07b56;     /* 浅咖啡 */
      --primary-rgb: 123, 75, 39;         /* RGB值用于透明度计算 */
      --text-color: #3e2723;              /* 深咖啡色 */
      --text-light: #795548;              /* 浅咖啡色 */
      --background-color: #f8f5f2;        /* 咖啡奶白色 */
      --section-bg: #f3ede7;              /* 更浅的咖啡奶白色 */
      --button-hover: #5d3317;            /* 深咖啡色hover */
      --primary-shadow: rgba(123, 75, 39, 0.18);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body, button, input, textarea, select {
      font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", "Helvetica Neue", Arial, "Noto Sans", "sans-serif";
      font-weight: 400;
      color: var(--text-color);
      background: var(--background-color);
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      color: var(--text-color);
      background-color: var(--background-color);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }

    /* 隐藏滚动条 */
    @media (min-width: 769px) {
      html, body, div, main, section, article, aside, nav {
        scrollbar-width: none !important;
        -ms-overflow-style: none !important;
      }
      ::-webkit-scrollbar, ::-webkit-scrollbar-button, ::-webkit-scrollbar-track, 
      ::-webkit-scrollbar-track-piece, ::-webkit-scrollbar-thumb, 
      ::-webkit-scrollbar-corner, ::-webkit-resizer {
        display: none !important;
        width: 0 !important;
        height: 0 !important;
        background: transparent !important;
      }
    }

    header {
      background-color: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 5%;
      border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    }

    .logo {
      display: flex;
      align-items: center;
    }

    .logo img {
      height: 32px;
      margin-right: 10px;
      border-radius: 8px;
    }

    .logo h1 {
      font-size: 22px;
      font-weight: 600;
    }

    .nav-links {
      display: flex;
      gap: 30px;
      align-self: center;
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
    }

    .nav-links a {
      color: var(--text-color);
      text-decoration: none;
      font-size: 16px;
      font-weight: 500;
      transition: color 0.3s;
      display: inline-flex;
      align-items: center;
    }

    .nav-links a:hover {
      color: var(--primary-color);
    }

    .nav-buttons {
      display: flex;
      gap: 15px;
      align-items: center;
    }

    .button {
      display: inline-block;
      padding: 10px 20px;
      border-radius: 24px;
      font-weight: 500;
      text-decoration: none;
      transition: all 0.3s ease;
      text-align: center;
    }

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

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

    .secondary-button {
      background-color: transparent;
      color: var(--text-color);
      border: 1px solid rgba(0, 0, 0, 0.1);
    }

    .secondary-button:hover {
      background-color: rgba(0, 0, 0, 0.05);
      transform: translateY(-2px);
    }

    .hero {
      padding: 180px 5% 120px;
      text-align: center;
      background-color: var(--background-color);
    }

    .hero h2 {
      font-size: 56px;
      font-weight: 700;
      margin-bottom: 20px;
      background: linear-gradient(to right, var(--primary-color), var(--primary-color-light));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }

    .hero p {
      font-size: 24px;
      color: var(--text-light);
      margin-bottom: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-bottom: 60px;
    }

    .hero-image {
      max-width: 85%;
      border-radius: 12px;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
      margin: 0 auto;
    }

    .features {
      padding: 100px 5%;
      background-color: var(--section-bg);
    }

    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }

    .section-title h3 {
      font-size: 40px;
      font-weight: 700;
      margin-bottom: 15px;
    }

    .section-title p {
      font-size: 20px;
      color: var(--text-light);
      max-width: 700px;
      margin: 0 auto;
    }

    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 40px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .feature-card {
      background-color: white;
      border-radius: 16px;
      padding: 40px 30px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
    }

    .feature-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }

    .feature-icon {
      width: 64px;
      height: 64px;
      margin: 0 auto 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: rgba(53, 92, 194, 0.1);
      border-radius: 50%;
      transition: transform 0.3s ease;
    }

    .feature-card:hover .feature-icon {
      transform: scale(1.1);
    }

    .feature-icon svg {
      width: 32px;
      height: 32px;
      stroke: var(--primary-color);
      stroke-width: 2;
    }

    .feature-card h4 {
      font-size: 22px;
      margin-bottom: 15px;
    }

    .feature-card p {
      color: var(--text-light);
      font-size: 16px;
    }

    .download {
      padding: 100px 5%;
      text-align: center;
    }

    .client-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .client-card {
      background-color: var(--section-bg);
      border-radius: 16px;
      padding: 30px;
      transition: transform 0.3s ease;
      cursor: pointer;
    }

    .client-card:hover {
      transform: translateY(-8px);
    }

    .client-card img {
      width: 80px;
      height: 80px;
      margin-bottom: 20px;
    }

    .client-card svg {
      width: 60px;
      height: 60px;
      margin-bottom: 20px;
      stroke: var(--primary-color);
      stroke-width: 1.5;
    }

    .client-card h4 {
      font-size: 20px;
      margin-bottom: 10px;
    }

    .client-card p {
      font-size: 14px;
      color: var(--text-light);
      margin-bottom: 20px;
    }

    .cta {
      padding: 100px 5%;
      background-color: var(--section-bg);
      text-align: center;
    }

    .cta-container {
      max-width: 800px;
      margin: 0 auto;
      background: linear-gradient(135deg, var(--primary-color), var(--primary-color-light));
      border-radius: 24px;
      padding: 60px;
      color: white;
      box-shadow: 0 20px 40px var(--primary-shadow);
    }

    .cta h3 {
      font-size: 36px;
      margin-bottom: 20px;
    }

    .cta p {
      font-size: 18px;
      margin-bottom: 30px;
      opacity: 0.9;
    }

    .cta-button {
      background-color: white;
      color: var(--primary-color);
      padding: 14px 30px;
      font-size: 16px;
      font-weight: 600;
    }

    .cta-button:hover {
      background-color: rgba(255, 255, 255, 0.9);
      transform: translateY(-2px);
    }

    footer {
      padding: 60px 5% 40px;
      background-color: var(--background-color);
      text-align: center;
    }

    .footer-links {
      display: flex;
      justify-content: center;
      gap: 40px;
      margin-bottom: 30px;
    }

    .footer-links a {
      color: var(--text-light);
      text-decoration: none;
      font-size: 16px;
      transition: color 0.3s;
    }

    .footer-links a:hover {
      color: var(--primary-color);
    }

    .footer-logo {
      margin-bottom: 20px;
    }

    .footer-logo img {
      height: 40px;
      border-radius: 8px;
    }

    .footer-logo svg {
      height: 40px;
      width: auto;
      stroke: var(--primary-color);
      stroke-width: 1.5;
    }

    .copyright {
      color: var(--text-light);
      font-size: 14px;
    }

    /* 响应式设计 */
    @media (max-width: 1024px) {
      .hero h2 {
        font-size: 48px;
      }
      .hero p {
        font-size: 20px;
      }
    }

    @media (max-width: 768px) {
      /* 强制隐藏移动端水平滚动条 */
      body {
        overflow-x: hidden;
      }
      
      .nav-links {
        display: none; /* 在移动端隐藏导航链接 */
      }
      
      .nav-buttons {
        display: none; /* 在移动端隐藏导航按钮 */
      }
      
      .mobile-menu-button {
        display: block; /* 在移动端显示菜单按钮 */
      }
      
      .mobile-nav {
        display: flex; /* 在移动端才显示 */
      }
      
      .mobile-nav-overlay {
        display: block; /* 只在移动设备宽度下显示 */
      }
      
      .hero {
        padding: 150px 5% 80px;
      }
      .hero h2 {
        font-size: 36px;
      }
      .hero p {
        font-size: 18px;
      }
      .section-title h3 {
        font-size: 32px;
      }
      .feature-grid, .client-grid {
        grid-template-columns: 1fr;
      }
      .cta-container {
        padding: 40px 20px;
      }
      .cta h3 {
        font-size: 28px;
      }
      .footer-links {
        flex-direction: column;
        gap: 20px;
      }
    }

    .mobile-menu-button {
      display: none;
      font-size: 24px;
      background: none;
      border: none;
      color: var(--text-color);
      cursor: pointer;
    }

    .mobile-nav {
      display: none; /* 默认隐藏，只在移动端显示 */
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: var(--background-color);
      flex-direction: column;
      padding: 80px 30px;
      z-index: 999;
      transform: translateX(100%);
      transition: transform 0.3s ease;
    }

    .mobile-nav-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.5);
      z-index: 998;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s ease, visibility 0.3s ease;
      display: none; /* 默认隐藏 */
    }
    
    .mobile-nav-overlay.active {
      opacity: 1;
      visibility: visible;
    }

    @media (max-width: 768px) {
      /* 强制隐藏移动端水平滚动条 */
      body {
        overflow-x: hidden;
      }
      
      .mobile-menu-button {
        display: block;
      }
      .nav-buttons {
        display: none;
      }
      .mobile-nav {
        display: flex; /* 在移动端才显示 */
      }
      .mobile-nav-overlay {
        display: block; /* 只在移动设备宽度下显示 */
      }
      .mobile-nav.active {
        transform: translateX(0);
      }
      .mobile-nav-links {
        display: flex;
        flex-direction: column;
        gap: 20px;
        margin-bottom: 40px;
      }
      .mobile-nav-links a {
        color: var(--text-color);
        text-decoration: none;
        font-size: 20px;
        font-weight: 500;
      }
      .mobile-nav-buttons {
        display: flex;
        flex-direction: column;
        gap: 15px;
      }
      .close-menu {
        position: absolute;
        top: 20px;
        right: 20px;
        font-size: 24px;
        background: none;
        border: none;
        color: var(--text-color);
        cursor: pointer;
      }
    }

    /* 添加加载动画样式 */
    .preloader {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: var(--background-color);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 9999;
      transition: opacity 0.8s ease, visibility 0.8s ease;
    }

    .preloader.fade-out {
      opacity: 0;
      visibility: hidden;
    }

    .loader {
      width: 50px;
      height: 50px;
      border: 3px solid rgba(var(--primary-rgb, 53, 92, 194), 0.1);
      border-radius: 50%;
      border-top-color: var(--primary-color);
      animation: spin 1s ease-in-out infinite;
      position: relative;
    }

    .loader::before {
      content: '';
      position: absolute;
      top: -3px;
      left: -3px;
      right: -3px;
      bottom: -3px;
      border: 3px solid transparent;
      border-bottom-color: var(--primary-color-light);
      border-radius: 50%;
      animation: spin 1.5s linear infinite;
    }

    @keyframes spin {
      0% {
        transform: rotate(0deg);
      }
      100% {
        transform: rotate(360deg);
      }
    }

    @keyframes pulse {
      0%, 100% {
        transform: scale(0.95);
        opacity: 0.8;
      }
      50% {
        transform: scale(1);
        opacity: 1;
      }
    }