/* styles.css */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      color: #333;
      background-color: #f9f9f9;
    }

    a {
      text-decoration: none;
      color: #007aff;
    }

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 头部：文字全白 */
    header {
      background-color: #FF2868;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
      padding: 15px 0;
      color: white;
    }

    .header-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-size: 24px;
      font-weight: bold;
      color: white; /* 原为 #ff6b00，现改为白色 */
    }

    header nav span {
      color: white; /* 导航文字白色 */
    }

    /* 主体内容 */
    main {
      padding: 60px 0;
    }

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

    .hero h1 {
      font-size: 36px;
      margin-bottom: 20px;
      color: #222;
    }

    .hero p {
      font-size: 18px;
      color: #666;
      max-width: 700px;
      margin: 0 auto 30px;
    }

    .download-btn {
      display: inline-block;
      background-color: #55C9F2; /* 替换原 #ff6b00 */
      color: white;
      padding: 14px 32px;
      font-size: 20px;
      font-weight: bold;
      border-radius: 8px;
      transition: background-color 0.3s;
    }

    .download-btn:hover {
      background-color: #3dbde0; /* 稍暗一点的 hover 色 */
    }

    /* 功能介绍 */
    .features {
      background-color: #fff;
      padding: 50px 0;
      margin-bottom: 60px;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .features h2 {
      text-align: center;
      font-size: 28px;
      margin-bottom: 40px;
      color: #222;
    }

    .feature-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
    }

    .feature-item {
      flex: 1;
      min-width: 250px;
      max-width: 320px;
      text-align: center;
      padding: 20px;
    }

    .feature-item h3 {
      font-size: 20px;
      margin: 15px 0;
      color: #55C9F2; /* 替换原 #ff6b00 */
    }

    .feature-item p {
      color: #666;
    }

    /* 核心功能区顶部图片 */
    .feature-top-image {
      width: 100%;
      height: 160px;
      object-fit: cover;
      border-bottom: 1px solid #eee;
    }

    /* 核心功能区 */
    .core-features {
      background-color: #fff;
      padding: 60px 0;
      margin-bottom: 60px;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .core-features h2 {
      text-align: center;
      font-size: 28px;
      margin-bottom: 40px;
      color: #222;
    }

    .feature-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 30px;
      justify-content: center;
    }

    .feature-card {
      flex: 1;
      min-width: 300px;
      max-width: 400px;
      background-color: #f9f9f9;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
      transition: transform 0.3s ease;
    }

    .feature-card:hover {
      transform: translateY(-5px);
    }

    .card-header {
      padding: 20px;
      background-color: #f0f7ff;
      border-bottom: 1px solid #e0e0e0;
    }

    .tag {
      display: inline-block;
      background-color: #e0f2fe;
      color: #55C9F2; /* 替换原 #007aff，保持品牌色一致 */
      font-size: 12px;
      padding: 4px 8px;
      border-radius: 4px;
      margin-bottom: 8px;
    }

    .card-header h3 {
      font-size: 20px;
      margin: 10px 0;
      color: #222;
    }

    .card-header p {
      color: #666;
      font-size: 14px;
    }

    .card-body {
      padding: 20px;
    }

    .benefits {
      list-style: none;
      margin: 20px 0;
    }

    .benefits li {
      padding: 10px 0;
      border-bottom: 1px dashed #eee;
      position: relative;
      padding-left: 30px;
    }

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

    /* SVG 图标颜色同步为 #55C9F2 */
    .icon-check::before,
    .icon-clock::before,
    .icon-chart::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 16px;
      height: 16px;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41L9 16.17z" fill="%2355C9F2"/></svg>');
      background-repeat: no-repeat;
      background-position: center;
      background-size: contain;
    }

    .icon-clock::before {
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm0-14c-3.31 0-6 2.69-6 6s2.69 6 6 6 6-2.69 6-6-2.69-6-6-6zm0 10c-1.1 0-2-.9-2-2s.9-2 2-2 2 .9 2 2-.9 2-2 2z" fill="%2355C9F2"/></svg>');
    }

    .icon-chart::before {
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 3H5c-1.1 0-2 .9-2 2v14h2V5h12V3zm-7 14H9v-2h3v2zm4 0h-2v-6h2v6zm-8 0H7v-4h2v4z" fill="%2355C9F2"/></svg>');
    }

    .btn-primary {
      display: inline-block;
      background-color: #55C9F2; /* 替换原 #007aff */
      color: white;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: bold;
      border-radius: 6px;
      transition: background-color 0.3s;
      text-align: center;
    }

    .btn-primary:hover {
      background-color: #3dbde0; /* hover 色 */
    }

    /* FAQ */
    .faq {
      background-color: #fff;
      padding: 50px 0;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .faq h2 {
      text-align: center;
      font-size: 28px;
      margin-bottom: 40px;
      color: #222;
    }

    .faq-item {
      margin-bottom: 20px;
      padding-bottom: 20px;
      border-bottom: 1px solid #eee;
    }

    .faq-item:last-child {
      border-bottom: none;
      margin-bottom: 0;
      padding-bottom: 0;
    }

    .faq-item h3 {
      font-size: 18px;
      margin-bottom: 8px;
      color: #333;
    }

    .faq-item p {
      color: #666;
    }

    /* 页脚 */
    footer {
      background-color: #222;
      color: #ccc;
      padding: 30px 0;
      text-align: center;
      font-size: 14px;
    }

    footer a {
      color: #55C9F2; /* 替换原 #ff6b00 */
    }