* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html, body {
      height: 100%;
      font-family: "Microsoft YaHei", "Noto Sans SC", "PingFang SC", system-ui, -apple-system, sans-serif;
    }
    
    body {
      display: flex;
      align-items: center;
      justify-content: center;
      background: white;
      padding: 20px;
    }

    body.modal-open {
      overflow: hidden;
    }
    
    .container {
      text-align: center;
      max-width: 500px;
      width: 100%;
      position: relative;
    }

    .settings-btn {
      position: absolute;
      top: -60px;
      right: 0;
      width: 48px;
      height: 48px;
      background: rgba(255, 255, 255, 0.9);
      border: none;
      border-radius: 50%;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      z-index: 100;
    }
    
    .settings-btn:hover {
      transform: rotate(90deg) scale(1.1);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
      background: rgba(255, 255, 255, 1);
    }
    
    .settings-btn .icon {
      width: 24px;
      height: 24px;
      transition: transform 0.3s ease;
    }
    
    .settings-btn:hover .icon {
      transform: rotate(90deg);
    }
    
    h1 {
      color: #2d5a5a;
      font-size: 48px;
      font-weight: 800;
      margin-bottom: 16px;
      text-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      letter-spacing: 2px;
    }
    
    .subtitle {
      color: #666;
      font-size: 17px;
      margin-bottom: 50px;
      font-weight: 400;
      letter-spacing: 0.3px;
      line-height: 1.6;
    }
    
    .button-group {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-bottom: 30px;
    }
    
    .choice-btn {
      background: white;
      border: none;
      border-radius: 20px;
      padding: 32px 48px;
      font-size: 22px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 10px 32px rgba(0,0,0,0.15);
      position: relative;
      overflow: hidden;
      text-decoration: none;
      display: block;
      color: #333;
      letter-spacing: 0.5px;
    }
    
    .choice-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
      transition: left 0.5s;
    }
    
    .choice-btn:hover::before {
      left: 100%;
    }
    
    .choice-btn:hover {
      transform: translateY(-6px) scale(1.02);
      box-shadow: 0 16px 48px rgba(0,0,0,0.25);
    }
    
    .choice-btn:active {
      transform: translateY(-3px) scale(1);
      box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    }
    
    .btn-self {
      background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
      color: #5a3e36;
    }
    
    .btn-friend {
      background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
      color: #2d5a5a;
    }

    .btn-newyear {
      background: linear-gradient(135deg, #ff4b2b 0%, #ff416c 100%);
      color: #fff;
    }

    .btn-blessings {
      background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
      color: #3f3d56;
    }

    .btn-2026-love {
      background: linear-gradient(135deg, #ff6b6b 0%, #ee5a52 100%);
      color: #fff;
    }

    .btn-more {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: #fff;
    }

    .btn-christmas {
      background: linear-gradient(135deg, #2f7336 0%, #a8e063 100%);
      color: #fff;
    }

    /* 弹出框样式 */
    .modal-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 10000;
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
      transition: opacity 0.4s ease, visibility 0.4s ease;
    }

    .modal-overlay.active {
      display: flex;
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }

    .modal {
      background: linear-gradient(180deg, #ffffff 0%, #f8f9ff 100%);
      border-radius: 24px;
      padding: 0;
      max-width: 420px;
      width: 90%;
      position: relative;
      transform: scale(0.9) translateY(20px);
      transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
      box-shadow:
        0 25px 80px rgba(102, 126, 234, 0.25),
        0 10px 30px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
      overflow: hidden;
    }

    .modal-overlay.active .modal {
      transform: scale(1) translateY(0);
    }

    .modal-header {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      padding: 28px 32px 24px;
      position: relative;
      overflow: hidden;
    }

    .modal-header::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
      animation: shimmer 3s ease-in-out infinite;
      pointer-events: none;
    }

    @keyframes shimmer {
      0%, 100% { transform: rotate(0deg); }
      50% { transform: rotate(180deg); }
    }

    .modal-close {
      position: absolute;
      top: 20px;
      right: 20px;
      background: rgba(255, 255, 255, 0.2);
      border: none;
      font-size: 20px;
      cursor: pointer;
      color: #fff;
      transition: all 0.3s ease;
      line-height: 1;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 100;
      pointer-events: auto;
    }

    .modal-close:hover {
      background: rgba(255, 255, 255, 0.3);
      transform: rotate(90deg);
    }

    .modal-close:active {
      transform: rotate(90deg) scale(0.9);
    }

    .modal-title {
      font-size: 26px;
      font-weight: 700;
      color: #fff;
      margin: 0;
      text-align: center;
      position: relative;
      z-index: 1;
      text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .modal-title::after {
      content: '🎯';
      display: block;
      font-size: 40px;
      margin-top: 8px;
      animation: bounce 2s ease-in-out infinite;
    }

    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    .modal-body {
      padding: 28px;
    }

    .modal-content {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .donate-section {
      background: linear-gradient(135deg, #fff5eb 0%, #ffe4d4 100%);
      padding: 20px 24px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 16px;
      font-weight: 600;
      color: #8b5a3c;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow:
        0 4px 15px rgba(252, 182, 159, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
      border: 1px solid rgba(252, 182, 159, 0.3);
      position: relative;
      overflow: hidden;
    }

    .donate-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
      transition: left 0.5s ease;
    }

    .donate-section:hover::before {
      left: 100%;
    }

    .donate-section:hover {
      transform: translateY(-3px);
      box-shadow:
        0 8px 25px rgba(252, 182, 159, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    }

    .donate-icon {
      font-size: 32px;
      animation: wiggle 2s ease-in-out infinite;
    }

    @keyframes wiggle {
      0%, 100% { transform: rotate(0deg); }
      25% { transform: rotate(-10deg); }
      75% { transform: rotate(10deg); }
    }

    .donate-qrcode {
      max-height: 0;
      overflow: hidden;
      opacity: 0;
      padding: 0;
      margin: 0;
      pointer-events: none;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      background: linear-gradient(180deg, #fffaf7 0%, #fff5ef 100%);
      border-radius: 20px;
      border: 2px dashed rgba(252, 182, 159, 0.4);
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .donate-qrcode.active {
      max-height: 380px;
      padding: 28px;
      margin-top: 12px;
      opacity: 1;
      pointer-events: auto;
    }

    .donate-qrcode img {
      max-width: 180px;
      width: 100%;
      border-radius: 16px;
      box-shadow:
        0 8px 30px rgba(0, 0, 0, 0.12),
        0 2px 8px rgba(0, 0, 0, 0.08);
      border: 3px solid #fff;
    }

    .donate-qrcode p {
      margin-top: 18px;
      font-size: 15px;
      color: #8b5a3c;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .donate-qrcode p::before {
      content: '📱';
    }

    .version-section {
      text-align: center;
      padding: 20px 24px;
      background: linear-gradient(135deg, #f0f4ff 0%, #e8edff 100%);
      border-radius: 16px;
      color: #5a6acf;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      align-items: center;
      gap: 14px;
      box-shadow:
        0 4px 15px rgba(102, 126, 234, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
      border: 1px solid rgba(102, 126, 234, 0.2);
      position: relative;
      overflow: hidden;
    }

    .version-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
      transition: left 0.5s ease;
    }

    .version-section:hover::before {
      left: 100%;
    }

    .version-section:hover {
      transform: translateY(-3px);
      box-shadow:
        0 8px 25px rgba(102, 126, 234, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    }

    .version-section .version-icon {
      font-size: 28px;
    }

    .announcement-section {
      text-align: center;
      padding: 20px 24px;
      background: linear-gradient(135deg, #fff0f0 0%, #ffe0e0 100%);
      border-radius: 16px;
      color: #d63384;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      align-items: center;
      gap: 14px;
      box-shadow:
        0 4px 15px rgba(214, 51, 132, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
      border: 1px solid rgba(214, 51, 132, 0.2);
      position: relative;
      overflow: hidden;
    }

    .announcement-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
      transition: left 0.5s ease;
    }

    .announcement-section:hover::before {
      left: 100%;
    }

    .announcement-section:hover {
      transform: translateY(-3px);
      box-shadow:
        0 8px 25px rgba(214, 51, 132, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    }

    .announcement-section .announcement-icon {
      font-size: 28px;
    }

    .announcement-content {
      max-height: 0;
      overflow: hidden;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      background: linear-gradient(145deg, #fff5f5 0%, #ffe8e8 100%);
      border-radius: 20px;
      border: 2px dashed rgba(214, 51, 132, 0.3);
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
    }

    .announcement-alert {
      width: 100%;
      background: #fff9fb;
      border: 1px solid rgba(214, 51, 132, 0.2);
      border-radius: 14px;
      padding: 16px;
      margin-bottom: 12px;
      box-shadow: 0 4px 12px rgba(214, 51, 132, 0.08);
      text-align: left;
    }

    .announcement-alert strong {
      display: block;
      color: #b12b6b;
      margin-bottom: 8px;
      font-size: 15px;
    }

    .announcement-alert p {
      margin: 0;
      color: #d63384;
      font-size: 14px;
      line-height: 1.6;
      font-weight: 600;
    }

    .announcement-content.active {
      max-height: 200px;
      padding: 28px;
      margin-top: 12px;
      opacity: 1;
      pointer-events: auto;
      animation: announcementSlideIn 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    @keyframes announcementSlideIn {
      0% {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
      }
      100% {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    .announcement-content h3 {
      font-size: 20px;
      font-weight: 700;
      background: linear-gradient(135deg, #d63384 0%, #e91e63 100%);
      background-clip: text;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 16px;
      text-align: center;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
    }

    .announcement-content p {
      font-size: 16px;
      color: #d63384;
      font-weight: 600;
      margin: 0;
      line-height: 1.6;
    }

    .version-hint {
      display: none;
    }

    .changelog {
      max-height: 0;
      overflow: hidden;
      transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      background: linear-gradient(145deg, #f8f9ff 0%, #f0f4ff 50%, #e8edff 100%);
      border-radius: 24px;
      border: 2px solid rgba(102, 126, 234, 0.1);
      box-shadow: 
        0 8px 32px rgba(102, 126, 234, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
      position: relative;
    }

    .changelog::before {
      content: '';
      position: absolute;
      top: -2px;
      left: -2px;
      right: -2px;
      bottom: -2px;
      background: linear-gradient(45deg, #667eea, #764ba2, #667eea);
      border-radius: 24px;
      z-index: -1;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .changelog.active::before {
      opacity: 0.3;
    }

    .changelog.active {
      max-height: 400px;
      padding: 28px;
      margin-top: 16px;
      overflow-y: auto;
      animation: changelogSlideIn 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    @keyframes changelogSlideIn {
      0% {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
      }
      100% {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    .changelog::-webkit-scrollbar {
      width: 8px;
    }

    .changelog::-webkit-scrollbar-track {
      background: rgba(102, 126, 234, 0.05);
      border-radius: 4px;
    }

    .changelog::-webkit-scrollbar-thumb {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      border-radius: 4px;
      box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    }

    .changelog::-webkit-scrollbar-thumb:hover {
      background: linear-gradient(135deg, #5a6acf 0%, #6a4190 100%);
    }

    .changelog h3 {
      font-size: 20px;
      font-weight: 700;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      background-clip: text;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 24px;
      text-align: center;
      padding-bottom: 16px;
      border-bottom: 2px solid rgba(102, 126, 234, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      position: relative;
    }

    .changelog h3::before {
      content: '📋';
      font-size: 22px;
      animation: iconFloat 3s ease-in-out infinite;
      -webkit-text-fill-color: initial;
    }

    @keyframes iconFloat {
      0%, 100% { transform: translateY(0px); }
      50% { transform: translateY(-3px); }
    }

    .changelog-item {
      margin-bottom: 20px;
      padding: 24px;
      background: linear-gradient(145deg, #ffffff 0%, #f8f9ff 100%);
      border-radius: 16px;
      box-shadow: 
        0 4px 16px rgba(0, 0, 0, 0.06),
        0 1px 3px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
      text-align: left;
      border: 1px solid rgba(102, 126, 234, 0.08);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }

    .changelog-item::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
      transition: left 0.6s ease;
    }

    .changelog-item:hover::before {
      left: 100%;
    }

    .changelog-item:hover {
      transform: translateY(-2px) translateX(4px);
      box-shadow: 
        0 8px 24px rgba(102, 126, 234, 0.15),
        0 4px 8px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
      border-color: rgba(102, 126, 234, 0.15);
    }

    .changelog-item:last-child {
      margin-bottom: 0;
    }

    .changelog-item strong {
      color: #fff;
      font-size: 13px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 16px;
      padding: 8px 16px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      border-radius: 25px;
      box-shadow: 
        0 4px 12px rgba(102, 126, 234, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      position: relative;
      overflow: hidden;
    }

    .changelog-item strong::before {
      content: '🏷️';
      font-size: 12px;
      animation: tagPulse 2s ease-in-out infinite;
    }

    @keyframes tagPulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.1); }
    }

    .changelog-item ul {
      padding-left: 0;
      margin: 0;
      list-style: none;
    }

    .changelog-item li {
      font-size: 15px;
      color: #4a5568;
      line-height: 1.8;
      margin-bottom: 10px;
      padding: 12px 0 12px 28px;
      position: relative;
      transition: color 0.2s ease;
    }

    .changelog-item li:hover {
      color: #2d3748;
    }

    .changelog-item li::before {
      content: '✨';
      position: absolute;
      left: 0;
      top: 12px;
      font-size: 14px;
      animation: sparkle 2s ease-in-out infinite;
    }

    @keyframes sparkle {
      0%, 100% { transform: scale(1) rotate(0deg); opacity: 1; }
      50% { transform: scale(1.2) rotate(180deg); opacity: 0.8; }
    }

    .changelog-item li:last-child {
      margin-bottom: 0;
    }
    
    .emoji {
      font-size: 36px;
      margin-right: 14px;
      display: inline-block;
      animation: float 3s ease-in-out infinite;
      filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
    }
    
    .btn-self .emoji {
      animation-delay: 0s;
    }
    
    .btn-friend .emoji {
      animation-delay: 0.5s;
    }

    .btn-blessings .emoji {
      animation-delay: 1s;
    }

    .btn-2026-love .emoji {
      animation-delay: 1.25s;
    }

    .btn-christmas .emoji {
      animation-delay: 1.5s;
    }
    
    @keyframes float {
      0%, 100% { 
        transform: translateY(0px) scale(1); 
      }
      50% { 
        transform: translateY(-8px) scale(1.05); 
      }
    }
    
    .footer {
      color: #999;
      font-size: 13px;
      margin-top: 40px;
      line-height: 1.6;
    }
    
    .credit {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid #e0e0e0;
    }
    
    .credit a {
      color: #667eea;
      text-decoration: none;
      font-weight: 500;
      transition: all 0.3s ease;
    }
    
    .credit a:hover {
      color: #764ba2;
      text-decoration: underline;
    }

    .build-version {
      margin-top: 8px;
      font-size: 12px;
      color: #b3b3b3;
    }
    
    @media (max-width: 480px) {
      body {
        padding: 16px;
      }
      h1 {
        font-size: 32px;
      }
      .subtitle {
        font-size: 15px;
        margin-bottom: 32px;
      }
      .button-group {
        gap: 16px;
      }
      .choice-btn {
        padding: 24px 32px;
        font-size: 18px;
      }
      .emoji {
        font-size: 28px;
      }
      .loading-screen {
        padding: 0 16px;
      }
      .loading-text {
        font-size: 42px;
        letter-spacing: 4px;
      }
      .loading-icon {
        width: 36px;
        height: 36px;
      }
      .progress-container {
        width: 250px;
      }
      .settings-btn {
        top: -50px;
        width: 36px;
        height: 36px;
      }
      .settings-btn .icon {
        width: 20px;
        height: 20px;
      }
    }
    
    /* 加载动画 */
    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    .container {
      animation: fadeIn 0.8s ease-out;
    }
    
    /* 加载屏幕样式 */
    .loading-screen {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: white;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      z-index: 9999;
      transition: opacity 0.5s ease, visibility 0.5s ease;
    }
    
    .loading-screen.fade-out {
      opacity: 0;
      visibility: hidden;
    }
    
    .loading-text {
      font-size: 64px;
      font-weight: 800;
      color: #000;
      margin-bottom: 40px;
      letter-spacing: 8px;
      display: flex;
      align-items: center;
      gap: 12px;
      position: relative;
      flex-wrap: wrap;
      justify-content: center;
      text-align: center;
    }
    
    .loading-text span {
      position: relative;
      background: linear-gradient(90deg, #000 0%, #000 40%, #fff 50%, #000 60%, #000 100%);
      background-size: 200% 100%;
      background-clip: text;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: shine 3s ease-in-out infinite;
    }
    
    @keyframes shine {
      0% {
        background-position: -200% 0;
      }
      50% {
        background-position: 200% 0;
      }
      100% {
        background-position: -200% 0;
      }
    }
    
    .loading-icon {
      width: 48px;
      height: 48px;
      animation: dropDown 0.8s ease-out 0.5s forwards, pulse 2s ease-in-out 1.3s infinite;
      transform: translateY(-60px) rotate(-15deg);
      opacity: 0;
    }
    
    @keyframes dropDown {
      0% {
        transform: translateY(-60px) rotate(-15deg);
        opacity: 0;
      }
      60% {
        transform: translateY(8px) rotate(5deg);
        opacity: 1;
      }
      80% {
        transform: translateY(-3px) rotate(-2deg);
      }
      100% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
      }
    }
    
    @keyframes pulse {
      0%, 100% {
        opacity: 1;
        transform: scale(1);
      }
      50% {
        opacity: 0.7;
        transform: scale(1.05);
      }
    }
    
    .progress-container {
      width: 300px;
      height: 6px;
      background: #f0f0f0;
      border-radius: 3px;
      overflow: hidden;
      box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
    }
    
    .progress-bar {
      height: 100%;
      background: linear-gradient(90deg, #a8edea 0%, #fed6e3 100%);
      border-radius: 3px;
      width: 0%;
      transition: width 0.3s ease;
      box-shadow: 0 0 10px rgba(168, 237, 234, 0.5);
    }
    
    @media (max-width: 360px) {
      h1 {
        font-size: 28px;
      }
      .subtitle {
        font-size: 14px;
      }
      .choice-btn {
        padding: 20px 24px;
        font-size: 16px;
      }
      .loading-text {
        font-size: 32px;
        letter-spacing: 1px;
      }
      .progress-container {
        width: 200px;
      }
      .settings-btn {
        top: -40px;
        width: 36px;
        height: 36px;
      }
      .settings-btn .icon {
        width: 18px;
        height: 18px;
      }
    }

    /* 移动设备优化 */
    @media (max-width: 480px) {
      .changelog.active {
        max-height: 300px;
        padding: 20px;
        margin-top: 12px;
      }
      
      .changelog h3 {
        font-size: 18px;
        margin-bottom: 20px;
      }
      
      .changelog h3::before {
        font-size: 20px;
      }
      
      .changelog-item {
        padding: 20px;
        margin-bottom: 16px;
      }
      
      .changelog-item strong {
        font-size: 12px;
        padding: 6px 12px;
        margin-bottom: 14px;
      }
      
      .changelog-item li {
        font-size: 14px;
        padding: 10px 0 10px 24px;
      }
      
      .changelog-item li::before {
        font-size: 12px;
        top: 10px;
      }
    }

    @media (max-width: 360px) {
      .changelog.active {
        max-height: 280px;
        padding: 16px;
      }
      
      .changelog-item {
        padding: 16px;
      }
      
      .changelog-item li {
        font-size: 13px;
        line-height: 1.6;
      }
    }