* {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      margin: 0;
      font-family: 'Inter', Arial, sans-serif;
      background: #f5f6fa;
      color: #222;
      line-height: 1.7;
    }
    header {
      background: #222;
      color: white;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      padding: 0.6em;
      padding-left: 2em;
      display: flex;
      align-items: center;
      gap: 2em;
      
      a {
        color: white;
        text-decoration: none;
        font-weight: 600;
        transition: color 0.2s;
        &:hover {
          color: #4f8cff;
        } 
      }

      a.ddw {
        background: linear-gradient(90deg, #00c896 0%, #0099ff 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        color: transparent;
        font-weight: bold;
      }
    }

    @media (max-width: 600px) {
      header {
        padding: 0.4em 1em;
        gap: 1em;

        a {
          font-size: 0.8rem;
          text-align: center;
        }
      }
    }

    .logo {
      display: block;
      font-size: 2.7rem;
      font-weight: 700;
      letter-spacing: -2px;
      margin: 0;
      margin-right: auto;
    }
    .hero {
      display: flex;
      align-items: center;
      padding: 72px 32px 56px 32px;
      background: linear-gradient(220deg, #e3eafc 0%, #f5f6fa 100%);
      gap: 56px;
    }
    .hero img {
      max-width: 720px;
      width: 100%;
      filter: drop-shadow(0 2px 8px rgba(0,0,0,0.1)) blur(0px);
      margin-right: 24px;
      animation: float 12s cubic-bezier(0.4,0.0,0.2,1.1) infinite, shadowFloat 12s cubic-bezier(0.4,0.0,0.2,1) infinite;
    }

    @keyframes float {
      0%   { transform: translateY(0px); }
      50%  { transform: translateY(-22px); }
      100% { transform: translateY(0px); }
    }

    @keyframes shadowFloat {
      0%   { filter: drop-shadow(0 2px 8px rgba(0,0,0,0.1));  }
      50%  { filter: drop-shadow(0 18px 28px rgba(0,0,0,0.16)) ; }
      100% { filter: drop-shadow(0 2px 8px rgba(0,0,0,0.1)) ; }
    }

    .hero .text {
      margin-left: auto;
      max-width: 35em;
      margin-right: 4em;
      text-align: center;
      margin-left: 4em;
    }
    
    @media (max-width: 1500px) {
      .hero {
        flex-direction: column;
        gap: 32px;
        padding: 40px 8px 32px 8px;
      }
      .hero img {
        margin-top: 100px;
        margin-right: 0;
      }
      .hero .text {
        margin-left: 1em;
        margin-right: 1em;
      }
    }
    .hero-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 28px;
      color: #222;
      text-align: center;
      background: linear-gradient(90deg, #4f8cff 0%, #a16eff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-fill-color: transparent;
      font-weight: bold;
      font-size: 2.5rem;
    }
    .hero-desc {
      font-size: 1.18rem;
      color: #444;
      max-width: 600px;
      text-align: center;
      margin-bottom: 40px;
      margin-top: 8px;
    }
    .cta-btn {
      background: #222;
      color: #fff;
      font-size: 1.15rem;
      font-weight: 600;
      padding: 18px 48px;
      border: none;
      border-radius: 28px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
      cursor: pointer;
      transition: background 0.2s;
      margin-top: 12px;
    }
    .cta-btn:hover {
      background: #444;
    }
    .features {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 68px;
      padding: 64px 32px;
      background: #fff;
      max-width: 1400px;
      margin: 0 auto;
    }
    .feature {
      background: #f5f6fa;
      
      border-radius: 28px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      padding: 44px 32px;
      max-width: 340px;
      flex: 1 1 280px;
      text-align: center;
      margin: 8px 0;
      position: relative;
      z-index: 1;
      box-shadow: 8px 8px 8px rgba(0,0,0,0.08);
      transition: transform 0.2s, box-shadow 0.2s;

      &:hover {
        transform: translateY(-4px);
        box-shadow: 0 4px 16px rgba(0,0,0,0.12);
      }
      
      &::before {
        content: "";
        position: absolute;
        inset: 0;
        border-radius: 28px;
        background: linear-gradient(90deg, #4f8cff 0%, #a16eff 100%);
        z-index: -2;
        pointer-events: none;
      }
      &::after {
        content: "";
        position: absolute;
        inset: 4px;
        border-radius: 24px;
        background: #efefef;
        z-index: -1;
        pointer-events: none;
      }
    }
    .feature-icon {
      font-size: 2.7rem;
      margin-bottom: 22px;
      color: #222;
    }
    .feature-title {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .feature-desc {
      font-size: 1.05rem;
      color: #555;
      margin-bottom: 4px;
    }
    footer {
      text-align: center;
      padding: 44px 16px;
      color: #888;
      font-size: 1rem;
      background: #fff;
      border-top: 1px solid #eee;
      margin-top: 32px;
    }
    @media (max-width: 700px) {
      .features {
        flex-direction: column;
        gap: 32px;
        padding: 40px 8px;
        align-items: center;
      }
      .hero {
        flex-direction: column;
        gap: 32px;
        padding: 40px 8px 32px 8px;
      }
      .hero img {
        max-width: 100%;
        margin-right: 0;
      }
      .feature {
        padding: 32px 12px;
      }
    }
    /* Products Section Styles */
    .products {
      background: linear-gradient(90deg,#e3eafc 0%,#f5f6fa 100%);
      padding: 72px 32px 56px 32px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .products-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 48px;
      color: #222;
      text-align: center;
      background: linear-gradient(90deg, #4f8cff 0%, #a16eff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      /* text-fill-color: transparent; */
    }
    .products-list {
      display: flex;
      gap: 48px;
      flex-wrap: wrap;
      justify-content: center;
      width: 100%;
      max-width: 1100px;
    }
    .product-card {
      background: #fff;
      border-radius: 28px;
      box-shadow: 0 4px 16px rgba(79,140,255,0.08);
      padding: 44px 32px;
      max-width: 380px;
      flex: 1 1 280px;
      text-align: center;
      position: relative;
      margin-bottom: 16px;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .product-card.fullset {
      box-shadow: 0 4px 16px rgba(161,110,255,0.08);
      border: 2.5px solid #a16eff;
    }
    .product-icon {
      font-size: 2.2rem;
      margin-bottom: 18px;
    }
    .product-name {
      font-size: 1.18rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: #222;
    }
    .product-desc {
      font-size: 1.05rem;
      color: #555;
      margin-bottom: 18px;
    }
    .product-price {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .price-controller {
      color: #4f8cff;
    }
    .price-fullset {
      color: #a16eff;
    }
    .buy-btn {
      background: #4f8cff;
      text-decoration: none;
      display: block;
      color: #fff;
      font-size: 1.1rem;
      font-weight: 600;
      padding: 14px 38px;
      border: none;
      border-radius: 24px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
      cursor: pointer;
      transition: background 0.2s;
    }
    .buy-btn.buy-fullset {
      background: #a16eff;
    }
    .buy-btn:hover {
      background: #222;
    }
    @media (max-width: 700px) {
      .products-list {
        flex-direction: column;
        gap: 32px;
        padding: 0;
        align-items: center;
      }
      .products {
        padding: 40px 8px 32px 8px;
      }
      .product-card {
        padding: 32px 12px;
      }
    }
    /* How Does It Work Section Styles */
    .how-it-works {
      background: #fff;
      padding: 72px 32px 56px 32px;
      max-width: 1100px;
      margin: 0 auto;
    }
    .how-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 32px;
      color: #222;
      text-align: center;
      background: linear-gradient(90deg, #4f8cff 0%, #a16eff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      /* text-fill-color: transparent; */
    }
    .how-desc {
      font-size: 1.18rem;
      color: hsl(0, 0%, 27%);
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
      line-height: 1.8;
    }
    .testimonials {
      background: linear-gradient(120deg, #e3eafc 0%, #f5f6fa 100%);
      padding: 64px 32px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .testimonials-list {
      display: flex;
      gap: 56px;
      flex-wrap: wrap;
      justify-content: center;
      width: 100%;
      max-width: 900px;
      align-items: center;
    }
    .testimonial {
      border-radius: 32px;
      flex: 1 1 320px;
      text-align: center;
      margin-bottom: 20px;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 180px;
    }
    .testimonial-quote {
      font-size: 2rem;
      font-weight: 600;
      color: #222;
      margin-bottom: 0;
      line-height: 1.3;
      position: relative;
      z-index: 1;
      padding-left: 44px;
      text-align: center;
    }
    .testimonial-quote::before {
      content: "“";
      font-size: 5.5rem;
      font-weight: 700;
      color: #a16eff;
      position: absolute;
      left: 0;
      top: -18px;
      line-height: 1;
      font-family: serif;
      z-index: 0;
      opacity: 0.18;
      pointer-events: none;
    }
    @media (max-width: 700px) {
      .testimonials-list {
      flex-direction: column;
      gap: 28px;
      padding: 0;
      align-items: center;
      }
      .testimonial {
      padding: 32px 14px 28px 14px;
      min-height: 120px;
      }
      .testimonial-quote {
      font-size: 1.3rem;
      padding-left: 32px;
      }
      .testimonial-quote::before {
      font-size: 3.2rem;
      top: -8px;
      }
    }
    /* Navigation Styles */
    .page-nav {
      width: 100%;
      background: #fff;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      padding: 18px 0 8px 0;
      margin-bottom: 0.5em;
      display: flex;
      justify-content: center;
      z-index: 10;
      position: sticky;
      top: 0;
    }
    .page-nav ul {
      display: flex;
      gap: 38px;
      list-style: none;
      margin: 0;
      padding: 0;
      font-size: 1.15rem;
      font-weight: 600;
    }
    .page-nav a {
      color: #222;
      text-decoration: none;
    }
    .page-nav a:hover {
      color: #4f8cff;
    }
    .page-nav a:active {
      color: #a16eff;
    }
    .page-nav a.active-nav {
      color: #a16eff !important;
    }

    @media (max-width: 700px) {
      .page-nav {
        display: none;
      }
    }

    .btn-lined-link {
      color: inherit;
      display: inline-block;
      padding: 8px 16px;
      border: 2px solid ;
      font-weight: 600;
      text-decoration: none;
      transition: background-color 0.2s, color 0.2s;
    }

    .hero-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1600px;
      margin: 0 auto;
      padding: 40px 20px;
    }

    @media (max-width: 1200px) {
      .hero-inner {
        flex-direction: column;
        align-items: center;
        gap: 32px;
        padding: 0;
      }
      .hero img {
        margin-top: 20px;
        margin-right: 0;
      }
      .hero .text {
        margin-left: 1em;
        margin-right: 1em;
        text-align: center;
      }
    }

form {
  select, textarea {
    flex: 1;
  }
}



@media (min-width: 1200px) {
  .video {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #ddd;
  }
  .video .container {
    width: 1200px;
    max-width: 100%;
    margin: 0 auto;
  }
}