.btn {
            padding: 10px 22px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-decoration: none;
            display: inline-block;
            text-align: center;
            font-size: 1rem;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }
        
        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            height: 100%;
            background: rgba(255,255,255,0.2);
            z-index: -1;
            transition: var(--transition);
        }
        
        .btn:hover::before {
            width: 100%;
        }
        
  
        .btn-secondary {
            background: var(--success);
            color: white;
            box-shadow: 0 4px 12px rgba(46, 196, 182, 0.4);
        }
        
        .btn-secondary:hover {
            background: #29a99f;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(46, 196, 182, 0.5);
        }
        
        .btn-lg {
            padding: 14px 32px;
            font-size: 1.1rem;
        }
        
        /* 页面标题区域 */
        .page-header {
            background: linear-gradient(135deg, #e0e7ff 0%, #dbeafe 100%);
            padding: 100px 0 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .page-header::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 800px;
            height: 800px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(67, 97, 238, 0.1) 0%, rgba(67, 97, 238, 0) 70%);
        }
        
        .page-header h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            color: var(--dark);
            position: relative;
            z-index: 2;
        }
        
        .page-header p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
            color: var(--gray);
            position: relative;
            z-index: 2;
        }
        
        /* 交易流程内容 */
        .process-section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
        }
        
        .section-title p {
            font-size: 1.1rem;
            color: var(--gray);
            margin-top: 25px;
        }
              /* 时间线样式 */
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--accent);
            left: 50%;
            margin-left: -2px;
            border-radius: 2px;
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: 80px;
        }
        
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        
        .timeline-content {
            position: relative;
            width: 45%;
            padding: 30px;
            background: white;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }
        
        .timeline-content:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        
        .timeline-item:nth-child(odd) .timeline-content {
            left: 0;
        }
        
        .timeline-item:nth-child(even) .timeline-content {
            left: 55%;
        }
        
        .timeline-icon {
            position: absolute;
            top: 32px;
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: white;
            z-index: 1;
        }
        
        .timeline-item:nth-child(odd) .timeline-icon {
            right: -85px;
            background: var(--primary);
        }
        
        .timeline-item:nth-child(even) .timeline-icon {
            left: -85px;
            background: var(--success);
        }
        
        .timeline-step {
            position: absolute;
            top: -10px;
            left: 20px;
            background: var(--warning);
            color: white;
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
        }
        
        .timeline-title {
            font-size: 1.6rem;
            margin-bottom: 15px;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .timeline-title i {
            color: var(--accent);
        }
        
        .timeline-desc {
            color: var(--gray);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        
        .timeline-features {
            list-style: none;
            margin-top: 20px;
        }
        
        .timeline-features li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--light-gray);
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        
        .timeline-features li:last-child {
            border-bottom: none;
        }
        
        .timeline-features li i {
            color: var(--success);
            margin-top: 5px;
        }
         /* 开始交易区域 */
        .start-section {
            text-align: center;
            padding: 60px 0;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .start-buttons {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
      /* 响应式设计 */
        @media (max-width: 991px) {
            .timeline::before {
                left: 30px;
            }
            
            .timeline-item:nth-child(odd) .timeline-content,
            .timeline-item:nth-child(even) .timeline-content {
                width: calc(100% - 90px);
                left: auto;
                margin-left: 80px;
            }
            
            .timeline-item:nth-child(odd) .timeline-icon,
            .timeline-item:nth-child(even) .timeline-icon {
                left: -85px;
            }
        }
        
         @media (max-width: 768px) {
            .page-header h1 {
                font-size: 2.2rem;
            }
        }
        
        @media (max-width: 576px) {
            .page-header {
                padding: 80px 0 40px;
            }
            
            .page-header h1 {
                font-size: 1.8rem;
            }
            
            .page-header p {
                font-size: 1rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .timeline-content {
                padding: 20px;
            }
            
            .timeline-title {
                font-size: 1.4rem;
            }
        }