:root {
      --primary: #bf95f7;
      --purple-border: rgba(191, 149, 247, 0.4);
      --btn-gradient: linear-gradient(135deg, #7634ea, #b04ef6);
      --error-red: #ff4d4d;
      --gold: #ffd700;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      background: #1a1a1a;
      color: #fff;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      overflow-x: hidden;
      overflow-y: auto;
      position: relative;
    }
    .container {
      width: 100%;
      min-height: 100vh;
      padding: 15px;
      display: flex;
      flex-direction: column;
    }
    .header {
      margin-top: 10px;
    }
    .description {
      color: #FF007F;
      font-size: 24px;
      text-align: center;
      margin-top: 100px;
      font-weight: 500;
    }
    .main-image-section {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 200vh;
      z-index: -1;
      overflow: hidden;
    }
    .scrolling-images {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 200%;
      animation: scrollBackground 30s linear infinite;
    }
    .scrolling-image {
      width: 100%;
      height: 50%;
      background-image: url('/images/changtu.jpg');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
    }
    @keyframes scrollBackground {
      0% { transform: translateY(0); }
      100% { transform: translateY(-50%); }
    }
    .left-container {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 9;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 15px;
      width: auto;
    }
    .title-text {
      width: 300px;
      color: #fe4e60;
      font-style: italic;
      font-size: 42px;
      font-weight: 900;
      text-align: center;
      text-shadow: 0 4px 8px rgba(0,0,0,0.7);
      letter-spacing: 2px;
      font-family: 'Montserrat', sans-serif;
    }
    .left-image-text-container {
      display: flex;
      align-items: center;
      gap: 15px;
      width: 100%;
      padding-left: 20px;
      padding-right: 20px;
    }
    .left-image {
      width: 60px;
      height: 60px;
      border-radius: 8px;
      overflow: hidden;
    }
    .left-image:hover {
      transform: scale(1.1);
    }
    .left-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .text-label {
      color: #fff;
      font-size: 20px;
      font-weight: bold;
      font-style: italic;
      font-family: "Comic Sans MS", "Comic Sans", cursive;
      line-height: 1.4;
      text-shadow: 0 2px 4px rgba(0,0,0,0.5);
      flex: 1;
      text-align: left;
    }
    .thumbnails {
      position: fixed;
      bottom: 125px;
      left: 0;
      width: 100%;
      display: flex;
      gap: 5px;
      z-index: 5;
      overflow-x: auto;
      scrollbar-width: none;
    }
    .thumbnails::-webkit-scrollbar {
      display: none;
    }
    .thumbnails-container {
      display: flex;
      gap: 5px;
      animation: scroll 20s linear infinite;
    }
    @keyframes scroll {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }
    .thumbnail {
      width: 120px;
      height: 200px;
      border-radius: 16px;
      object-fit: cover;
      border: none;
      box-shadow: 0 6px 16px rgba(0,0,0,0.5);
      transition: transform 0.3s ease;
    }
    .thumbnail:hover {
      transform: scale(1.05);
    }

    .download-button {
      position: fixed;
      bottom: 40px;
      left: 50%;
      transform: translateX(-50%) translateZ(0);
      z-index: 99999 !important;
      background: linear-gradient(145deg, #ff5a70, #fe2f50);
      border: none;
      border-radius: 50px;
      cursor: pointer;
      min-width: 240px;
      height: 75px;
      box-shadow:
        0 8px 30px rgba(254,78,96,0.7),
        0 0 40px rgba(255,60,80,0.8),
        0 0 60px rgba(255,100,120,0.6),
        inset 0 -4px 10px rgba(0,0,0,0.2),
        inset 0 4px 10px rgba(255,255,255,0.2);
      transition: all 0.35s cubic-bezier(0.175,0.885,0.32,1.275);
      text-decoration: none;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      will-change: transform, box-shadow;
      -webkit-font-smoothing: antialiased;
      animation: glowPulse 2.2s infinite ease-in-out;
    }
    .download-button span {
      color: #fff;
      font-size: 28px;
      font-weight: 900;
      text-shadow: 0 3px 8px rgba(0,0,0,0.4);
      letter-spacing: 1.5px;
      z-index: 2;
    }
    .download-button:hover {
      transform: translateX(-50%) scale(1.08) translateZ(0);
      box-shadow:
        0 12px 40px rgba(254,78,96,0.9),
        0 0 55px rgba(255,60,80,1),
        0 0 80px rgba(255,100,120,0.8),
        inset 0 -4px 10px rgba(0,0,0,0.25),
        inset 0 4px 10px rgba(255,255,255,0.25);
    }
    @keyframes glowPulse {
      0%,100% {
        box-shadow:
          0 8px 30px rgba(254,78,96,0.7),
          0 0 40px rgba(255,60,80,0.8),
          0 0 60px rgba(255,100,120,0.6),
          inset 0 -4px 10px rgba(0,0,0,0.2),
          inset 0 4px 10px rgba(255,255,255,0.2);
      }
      50% {
        box-shadow:
          0 10px 35px rgba(254,78,96,0.9),
          0 0 50px rgba(255,60,80,1),
          0 0 75px rgba(255,100,120,0.8),
          inset 0 -4px 10px rgba(0,0,0,0.2),
          inset 0 4px 10px rgba(255,255,255,0.2);
      }
    }

    @media (min-width: 768px) {
      .main-image-section {
        left: 50%;
        transform: translateX(-50%);
        width: 400px;
      }
      .container {
        width: 400px;
        margin: 0 auto;
      }
      body {
        display: flex;
        justify-content: center;
      }
      .left-container {
        left: 50%;
        transform: translateX(-50%);
      }
      .title-text {
        font-size: 48px;
      }
      .left-image-text-container {
        width: 400px;
        padding-left: 0;
        padding-right: 0;
      }
      .left-image {
        width: 70px;
        height: 70px;
      }
      .text-label {
        font-size: 16px;
      }
      .thumbnails {
        left: 50%;
        transform: translateX(-50%);
        width: 400px;
        bottom: 80px;
      }
      .download-button {
        height: 80px;
        min-width: 350px;
      }
      .download-button span {
        font-size: 36px;
      }
    }

    .main-container,
    .modal-overlay,
    .loading-overlay {
      display: none;
    }