/* styles_4work_step.css */
    .how-it-works {
      
      padding: 40px 20px 60px;
      
      background-image: url('../img/4steps/4steps.jpg');
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      position: relative;
      overflow: hidden;
    }
    
    .how-it-works::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      
      z-index: 0;
    }
    
    .how-it-works h2 {
      font-size: 2.2rem;
    margin-bottom: 30px;
    color: var(--dark-blue);
    text-align: center;
    font-weight: 600;
    }
    
    .how-it-works .subtitle {
      font-size: 18px;
      color: #000000;
      text-align: center;
      margin-bottom: 50px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
      position: relative;
      z-index: 1;
    }
    
    .steps-container {
      display: flex;
      justify-content: space-between;
      position: relative;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      z-index: 1;
    }
    
    .step-card {
      position: relative;
      width: calc(25% - 30px);
      background: #fff;
      border-radius: 10px;
      padding: 30px 20px;
      box-shadow: 0 5px 15px rgba(0,0,0,0.08);
      transition: all 0.3s ease;
      z-index: 1;
      margin: 0 15px;
      box-sizing: border-box;
    }
    
    .step-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 15px 30px rgba(0,0,0,0.12);
    }
    
    .step-number {
      position: absolute;
      top: -20px;
      left: 20px;
      background: #27ae60;
      color: white;
      width: 75px;
      height: 40px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 20px;
      box-shadow: 0 3px 10px rgba(39, 174, 96, 0.3);
    }
    
    .step-content h3 {
      color: #2a6496;
      margin-top: 20px;
      margin-bottom: 15px;
      font-size: 20px;
    }
    
    .step-content p {
      color: #000000;
      font-weight: bold;
      font-size: 17px;
      line-height: 1.6;
    }
    
    .step-content strong {
      color: #27ae60;
    }
    
    .arrow {
      position: absolute;
      right: -30px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 30px;
      color: #27ae60;
      font-weight: bold;
      z-index: 2;
    }
    
    /* decor line */
    .steps-container::before {
      content: '';
      position: absolute;
      top: 40%;
      left: 20px;
      right: 20px;
      height: 2px;
      background: linear-gradient(to right, transparent 0%, #27ae60 20%, #27ae60 80%, transparent 100%);
      z-index: -1;
    }
    
    /* adapt */
    @media (max-width: 1200px) {
      .steps-container {
        padding: 0 15px;
      }
      
      .step-card {
        width: calc(25% - 20px);
        margin: 0 10px;
      }
    }
    
    @media (max-width: 992px) {
      .step-card {
        width: calc(50% - 20px);
        margin-bottom: 60px;
      }
      
      .steps-container {
        flex-wrap: wrap;
        justify-content: center;
      }
      
      .steps-container::before {
        display: none;
      }
      
      .arrow {
        display: none;
      }
    }
    
    /* adapt mobile */
    @media (max-width: 768px) {
      .how-it-works {
        padding: 30px 15px;
      }
      
      .how-it-works h2 {
        font-size: 28px;
      }
      
      .how-it-works .subtitle {
        font-size: 16px;
      }
      
      .step-card {
        width: 100%;
        margin: 0 0 40px 0;
      }
      
      .step-number {
        width: 75px;
        height: 40px;
        font-size: 18px;
      }
      
      /* line mobile */
      .step-card:not(:last-child)::after {
        content: '↓';
        position: absolute;
        bottom: -25px;
        left: 50%;
        transform: translateX(-50%);
        font-size: 30px;
        color: #27ae60;
        font-weight: bold;
        z-index: 2;
      }
    }