* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: #0f172a;
      color: #f8fafc;
      line-height: 1.5;
      min-height: 100vh;
      overflow-x: hidden;
    }

    .container {
      max-width: 100%;
      margin: 0 auto;
      padding: 20px 16px;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    .header {
      margin-bottom: 24px;
      text-align: center;
    }

    .brand {
      font-size: 1.3rem;
      font-weight: 700;
      color: #2563eb;
      margin-bottom: 8px;
    }

    .title {
      margin: 0 0 12px 0;
      font-size: 2rem;
      font-weight: 700;
      background: linear-gradient(135deg, #2563eb, #10b981);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }

    .subtitle {
      font-size: 1.1rem;
      color: #94a3b8;
      margin-bottom: 8px;
      font-weight: 400;
    }

    .features {
      display: flex;
      gap: 12px;
      margin: 24px 0;
      overflow-x: auto;
      padding: 8px 0;
      -webkit-overflow-scrolling: touch;
      justify-content: center;
    }

    .feature-card {
      flex: 0 0 auto;
      background: #1e293b;
      padding: 16px;
      border-radius: 12px;
      border: 1px solid #334155;
      width: 140px;
      text-align: center;
    }

    .feature-icon {
      font-size: 1.5rem;
      margin-bottom: 8px;
    }

    .feature-title {
      font-size: 0.9rem;
      margin: 0 0 4px 0;
      font-weight: 600;
    }

    .feature-desc {
      font-size: 0.8rem;
      color: #94a3b8;
      margin: 0;
    }

    /* 主输入区域 - 修复移动端 */
    .main-card {
      background: #1e293b;
      padding: 24px 20px;
      border-radius: 16px;
      border: 1px solid #334155;
      margin: 16px 0;
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
    }

    .input-section {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 20px 0;
      width: 100%;
      max-width: 400px;
    }

    .stock-input {
      width: 100%;
      height: 56px;
      padding: 0 20px;
      font-size: 16px;
      border-radius: 12px;
      border: 2px solid #334155;
      background: #0f172a;
      color: #f8fafc;
      outline: none;
      transition: all 0.3s ease;
      text-align: center;
    }

    .stock-input:focus {
      border-color: #2563eb;
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    }

    .stock-input::placeholder {
      color: #64748b;
      font-size: 16px;
      text-align: center;
    }

    .analyze-btn {
      background: linear-gradient(135deg, #10b981, #059669);
      color: white;
      font-size: 18px;
      font-weight: 600;
      padding: 18px 24px;
      border: none;
      border-radius: 14px;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.3);
      width: 100%;
      min-height: 60px;
    }

    .analyze-btn:active {
      transform: scale(0.98);
      box-shadow: 0 2px 8px 0 rgba(16, 185, 129, 0.4);
    }

    .progress-section {
      margin: 24px 0;
      width: 100%;
      max-width: 400px;
    }

    .progress-bar {
      height: 6px;
      background: #334155;
      border-radius: 8px;
      overflow: hidden;
      margin: 12px 0;
    }

    .progress-fill {
      height: 100%;
      width: 0;
      background: linear-gradient(90deg, #2563eb, #10b981);
      transition: width 0.4s ease;
    }

    .status-text {
      margin-top: 8px;
      font-size: 14px;
      color: #94a3b8;
      font-weight: 500;
      text-align: center;
    }

    .disclaimer {
      margin-top: 24px;
      font-size: 11px;
      color: #64748b;
      line-height: 1.4;
      text-align: center;
      width: 100%;
    }

    /* 模态框样式 */
    .modal {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(15, 23, 42, 0.98);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      padding: 20px;
      backdrop-filter: blur(10px);
    }

    .modal-content {
      width: 100%;
      max-width: 400px;
      background: #1e293b;
      border-radius: 20px;
      padding: 24px;
      border: 1px solid #334155;
      color: #f8fafc;
      text-align: left;
      position: relative;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
      max-height: 90vh;
      overflow-y: auto;
    }

    .close-btn {
      position: absolute;
      right: 16px;
      top: 16px;
      font-size: 24px;
      color: #64748b;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      border-radius: 8px;
      transition: background 0.2s ease;
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .close-btn:active {
      background: #334155;
    }

    .analysis-step {
      margin-top: 20px;
      font-size: 14px;
      color: #94a3b8;
      font-weight: 500;
      margin-bottom: 8px;
    }

    .cta-section {
      text-align: center;
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid #334155;
    }

    .whatsapp-btn {
      background: linear-gradient(135deg, #2563eb, #1d4ed8);
      color: white;
      font-size: 16px;
      font-weight: 600;
      padding: 16px 24px;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      transition: all 0.3s ease;
      width: 100%;
      min-height: 54px;
    }

    .whatsapp-btn:active {
      transform: scale(0.98);
    }

    /* 移动端优化 */
    @media (max-width: 768px) {
      .container {
        padding: 16px 12px;
      }
      
      .title {
        font-size: 1.8rem;
      }
      
      .subtitle {
        font-size: 1rem;
      }
      
      .main-card {
        padding: 20px 16px;
        margin: 12px 0;
      }
      
      .feature-card {
        width: 130px;
        padding: 14px;
      }
      
      .features {
        justify-content: flex-start;
      }
      
      .stock-input {
        font-size: 16px;
        height: 52px;
      }
      
      .analyze-btn {
        min-height: 56px;
        font-size: 17px;
      }
      
      .modal {
        padding: 16px;
      }
      
      .modal-content {
        padding: 20px;
      }
    }

    @media (max-width: 480px) {
      .title {
        font-size: 1.6rem;
      }
      
      .subtitle {
        font-size: 0.9rem;
      }
      
      .feature-card {
        width: 120px;
        padding: 12px;
      }
      
      .feature-title {
        font-size: 0.85rem;
      }
      
      .feature-desc {
        font-size: 0.75rem;
      }
      
      .main-card {
        padding: 16px 12px;
      }
      
      .input-section,
      .progress-section {
        max-width: 100%;
      }
    }

    /* 安全区域支持 */
    @supports(padding: max(0px)) {
      .container {
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
        padding-bottom: max(20px, env(safe-area-inset-bottom));
      }
    }