:root {
      --main-bg: rgba(255, 255, 255, 0.85);
      --glass-bg: rgba(255, 255, 255, 0.5);
      --card-bg: rgba(255, 255, 255, 0.75);
      --primary: #ff6b8b;
      --primary-dark: #ff4d6d;
      --secondary: #6a67ce;
      --success: #4CAF50;
      --text-dark: #333;
      --text-light: #555;
      --shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
      color: var(--text-dark);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      background-image: url('https://img.czzu.cn/u/moe/8ro8rTW1.jpg');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
    }

    header {
      background: var(--main-bg);
      padding: 1rem 2rem;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1000;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

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

    .logo {
      font-size: 1.6rem;
      font-weight: bold;
      color: var(--text-dark);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo i {
      color: var(--primary);
    }

    .nav-links {
      list-style: none;
      display: flex;
      gap: 1.5rem;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text-dark);
      font-size: 1.1rem;
      padding: 0.5rem 0.8rem;
      transition: var(--transition);
      border-radius: 50px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-links a:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-2px);
    }

    .burger {
      display: none;
      flex-direction: column;
      cursor: pointer;
    }

    .burger div {
      width: 25px;
      height: 3px;
      background: var(--text-dark);
      margin: 4px;
      transition: var(--transition);
    }

    main {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 120px 20px 80px;
    }

    .upload-container {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      padding: 2.5rem;
      border-radius: 20px;
      box-shadow: var(--shadow);
      max-width: 1000px;
      width: 100%;
      animation: fadeIn 0.8s ease-out;
      display: flex;
      flex-direction: column;
      gap: 25px;
    }

    .upload-header {
      text-align: center;
      margin-bottom: 15px;
    }

    .upload-header h1 {
      font-size: 2.2rem;
      margin-bottom: 10px;
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .upload-header h1::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 50%;
      transform: translateX(-50%);
      width: 70px;
      height: 4px;
      background: var(--secondary);
      border-radius: 2px;
    }

    .upload-header p {
      color: var(--text-light);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
      line-height: 1.6;
    }

    #uploadForm {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .file-input-container {
      position: relative;
      border: 2px dashed var(--primary);
      border-radius: 15px;
      padding: 40px 20px;
      text-align: center;
      background: rgba(255, 255, 255, 0.3);
      transition: var(--transition);
      cursor: pointer;
    }

    .file-input-container:hover {
      background: rgba(255, 255, 255, 0.5);
      transform: translateY(-3px);
    }

    .file-input-container i {
      font-size: 3.5rem;
      color: var(--primary);
      margin-bottom: 15px;
    }

    .file-input-container h3 {
      font-size: 1.4rem;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .file-input-container p {
      color: var(--text-light);
      margin-bottom: 15px;
    }

    .custom-file-input {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      opacity: 0;
      cursor: pointer;
    }

    .upload-btn {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: white;
      border: none;
      padding: 14px 25px;
      border-radius: 50px;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      box-shadow: 0 4px 15px rgba(255, 107, 139, 0.4);
    }

    .upload-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 20px rgba(255, 107, 139, 0.6);
    }

    .upload-btn:active {
      transform: translateY(1px);
    }

    .result-container {
      background: var(--glass-bg);
      backdrop-filter: blur(8px);
      border-radius: 15px;
      padding: 20px;
      margin-top: 10px;
      min-height: 60px;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .result-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 15px;
    }

    .result-header .title {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .result-header i {
      color: var(--secondary);
      font-size: 1.4rem;
    }

    .result-header h3 {
      font-size: 1.3rem;
      color: var(--text-dark);
    }

    .copy-all-btn {
      background: var(--secondary);
      color: white;
      border: none;
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.95rem;
      cursor: pointer;
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .copy-all-btn:hover {
      background: #5957b3;
      transform: translateY(-2px);
    }

    .result-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .result-item {
      background: white;
      border-radius: 10px;
      padding: 15px;
      word-break: break-all;
      font-family: monospace;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: transform 0.3s ease;
    }

    .result-item:hover {
      transform: translateX(5px);
    }

    .result-item .url {
      flex: 1;
    }

    .result-item a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }

    .result-item a:hover {
      color: var(--primary-dark);
      text-decoration: underline;
    }

    .copy-btn {
      background: var(--success);
      color: white;
      border: none;
      padding: 6px 12px;
      border-radius: 30px;
      font-size: 0.85rem;
      cursor: pointer;
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 5px;
      margin-left: 10px;
    }

    .copy-btn:hover {
      background: #43a047;
    }

    .preview-container {
      margin-top: 20px;
      border-radius: 15px;
      overflow: hidden;
      background: var(--glass-bg);
      backdrop-filter: blur(8px);
      padding: 20px;
    }

    .preview-container h3 {
      margin-bottom: 15px;
      color: var(--text-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
    }

    .preview-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 15px;
      margin-top: 15px;
    }

    .preview-item {
      position: relative;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.5);
      transition: transform 0.3s ease;
      aspect-ratio: 16/9;
    }

    .preview-item:hover {
      transform: translateY(-5px);
    }

    .preview-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .preview-item .filename {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(0, 0, 0, 0.7);
      color: white;
      padding: 5px 8px;
      font-size: 0.8rem;
      text-align: center;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .upload-progress {
      height: 6px;
      background: rgba(0, 0, 0, 0.1);
      border-radius: 3px;
      overflow: hidden;
      margin-top: 15px;
      display: none;
    }

    .progress-bar {
      height: 100%;
      background: var(--primary);
      width: 0%;
      transition: width 0.3s ease;
    }

    .file-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 15px;
    }

    .file-tag {
      background: rgba(106, 103, 206, 0.2);
      padding: 5px 10px;
      border-radius: 20px;
      font-size: 0.85rem;
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .file-tag .remove-btn {
      cursor: pointer;
      color: #ff4d6d;
    }

    footer {
      background: var(--main-bg);
      text-align: center;
      padding: 1.2rem;
      width: 100%;
      font-size: 0.95rem;
      backdrop-filter: blur(10px);
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    @media screen and (max-width: 768px) {
      .nav-links {
        position: fixed;
        right: 0;
        top: 0;
        height: 100vh;
        background: var(--main-bg);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 70%;
        transform: translateX(100%);
        transition: transform 0.4s ease-in-out;
        backdrop-filter: blur(15px);
      }

      .nav-links.nav-active {
        transform: translateX(0%);
      }

      .nav-links li {
        opacity: 0;
        animation: navLinkFade 0.5s forwards ease-in;
      }

      .burger {
        display: flex;
      }

      .burger.toggle .line1 {
        transform: rotate(-45deg) translate(-5px, 6px);
      }

      .burger.toggle .line2 {
        opacity: 0;
      }

      .burger.toggle .line3 {
        transform: rotate(45deg) translate(-5px, -6px);
      }

      .upload-container {
        padding: 1.8rem;
      }

      .upload-header h1 {
        font-size: 1.8rem;
      }

      .file-input-container h3 {
        font-size: 1.2rem;
      }

      .preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
      }

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