:root {
            --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --glass: rgba(255, 255, 255, 0.9);
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            --text: #2d3748;
            --accent: #4fd1c5;
            --nav-height: 70px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
        }

        body {
            background: #f7fafc;
            color: var(--text);
            line-height: 1.6;
            padding-top: var(--nav-height);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* 固定导航栏 */
        .sticky-nav {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            padding: 1rem 0;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-link {
            color: var(--text);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
        }

        .nav-link:hover {
            background: rgba(108,92,231,0.1);
        }

        /* 主内容区 */
        .hero {
            text-align: center;
            padding: 6rem 0 4rem;
            background: var(--gradient);
            color: white;
            clip-path: ellipse(100% 60% at 50% 40%);
            margin-bottom: 4rem;
        }

        /* 卡片样式 */
        .card {
            background: var(--glass);
            backdrop-filter: blur(10px);
            border-radius: 1.5rem;
            padding: 2.5rem;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255,255,255,0.3);
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.8rem;
            padding: 1rem 2rem;
            border-radius: 2rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
        }

        .btn-primary {
            background: var(--accent);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(79,209,197,0.3);
        }


		
		  /* 使用说明模块 */
  
        .manual-grid {
            display: grid;
            gap: 2rem;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        }

        .manual-card {
            background: rgba(255,255,255,0.95);
            padding: 2rem;
            border-radius: 1rem;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            transition: transform 0.3s;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .manual-card:hover {
            transform: translateY(-5px);
        }

        /* 版本时间线 */
        .timeline {
            position: relative;
            padding-left: 2rem;
            margin: 3rem 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 2px;
            height: 100%;
            background: #e2e8f0;
        }

        .timeline-item {
            position: relative;
            padding: 1.5rem;
            margin: 2rem 0;
            background: white;
            border-radius: 1rem;
            box-shadow: var(--shadow);
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.3rem;
            top: 1.8rem;
            width: 1rem;
            height: 1rem;
            background: var(--accent);
            border-radius: 50%;
        }
		/* 返回顶部按钮样式 */
		.top {
			position: fixed;
			bottom: calc(2rem + 90px); /* 在客服按钮上方保持间距 */
			right: 2rem;
			width: 60px;
			height: 60px;
			border-radius: 50%;
			background: var(--accent);
			color: white;
			border: none;
			cursor: pointer;
			opacity: 0;
			visibility: hidden;
			transform: translateY(20px);
			transition: all 0.3s ease;
			box-shadow: 0 4px 8px rgba(0,0,0,0.15);
			z-index: 1000;
			display: flex;
			align-items: center;
			justify-content: center;
		}

		.top.show {
			opacity: 1;
			visibility: visible;
			transform: translateY(0);
			display: flex !important;
		}
		.top:hover {
			background: var(--primary);
			transform: translateY(-3px) scale(1.1);
			box-shadow: 0 8px 20px rgba(0,0,0,0.3);
		}
		

		.hidden{
			display:none;
		}

        /* 响应式设计 */
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }

            .nav-links {
                display: none;
            }

            .mobile-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                padding: 1rem;
                box-shadow: var(--shadow);
                flex-direction: column;
                gap: 1rem;
            }

            .menu-toggle {
                display: block;
                background: none;
                border: none;
                font-size: 1.5rem;
                color: var(--text);
            }

            .hero {
                padding: 4rem 0;
                clip-path: ellipse(120% 60% at 50% 40%);
            }

            .timeline::before {
                left: 0.5rem;
            }

            .timeline-item::before {
                left: -0.8rem;
            }
			 .chat-bubble {
				bottom: 1.5rem;
				right: 1.5rem;
				width: 50px;
				height: 50px;
			}

			.top {
				bottom: calc(1.5rem + 65px); /* 保持间距 */
				right: 1.5rem;
				width: 45px;
				height: 45px;
			}
        }
		/* 横屏优化 */
		@media (orientation: landscape) {
			.chat-bubble {
				bottom: 1rem;
				right: 1rem;
			}
			
			.back-to-top {
				bottom: calc(1rem + 85px);
				right: 1rem;
			}
		}
		.loading-spinner {
		  width: 1rem;
		  height: 1rem;
		  border: 2px solid #fff;
		  border-radius: 50%;
		  border-top-color: transparent;
		  animation: spin 0.8s linear infinite;
		}

		@keyframes spin {
		  to { transform: rotate(360deg); }
		}

		/* 渐变悬浮效果 */
		.customer-service-btn {
		  position: fixed;
		  bottom: 40px;
		  right: 40px;
		  width: 80px;
		  height: 80px;
		  border-radius: 50%;
		  background: linear-gradient(135deg, #4fd1c5 0%, #4299e1 100%);
		  display: flex;
		  align-items: center;
		  justify-content: center;
		  cursor: pointer;
		  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
		  box-shadow: 0 8px 25px rgba(79, 209, 197, 0.3);
		  z-index: 1000;
		  overflow: hidden;
		}

		/* 流体动效 */
		.customer-service-btn::after {
		  content: '';
		  position: absolute;
		  width: 120%;
		  height: 120%;
		  background: rgba(255,255,255,0.1);
		  transform: rotate(45deg) translate(-20%, 100%);
		  transition: transform 0.5s ease;
		}

		.customer-service-btn:hover::after {
		  transform: rotate(45deg) translate(-20%, -50%);
		}

		/* 图标动画 */
		.customer-service-btn i {
		  font-size: 2.2rem;
		  color: white;
		  transition: transform 0.3s;
		  position: relative;
		  z-index: 1;
		}

		.customer-service-btn:hover i {
		  transform: scale(1.1) rotate(-10deg);
		}

		/* 通知徽章 */
		.notification-badge {
		  position: absolute;
		  top: 10px;
		  right: 10px;
		  background: #ff4757;
		  color: white;
		  width: 24px;
		  height: 24px;
		  border-radius: 50%;
		  display: flex;
		  align-items: center;
		  justify-content: center;
		  font-size: 12px;
		  font-weight: bold;
		  animation: ping 1.5s infinite;
		}

		/* 悬浮提示 */
		.tooltip {
		  position: absolute;
		  right: 100%;
		  top: 50%;
		  transform: translateY(-50%);
		  background: rgba(0,0,0,0.8);
		  color: white;
		  padding: 8px 12px;
		  border-radius: 4px;
		  font-size: 14px;
		  white-space: nowrap;
		  opacity: 0;
		  pointer-events: none;
		  transition: opacity 0.3s, transform 0.3s;
		}

		.customer-service-btn:hover .tooltip {
		  opacity: 1;
		  transform: translateY(-50%) translateX(-10px);
		}

		/* 动画效果 */
		@keyframes ping {
		  0% { transform: scale(1); }
		  50% { transform: scale(1.2); }
		  100% { transform: scale(1); }
		}

		/* 点击涟漪效果 */
		.customer-service-btn:active {
		  animation: ripple 0.6s linear;
		}

		@keyframes ripple {
		  from {
			box-shadow: 0 0 0 0 rgba(79, 209, 197, 0.3),
						0 0 0 10px rgba(79, 209, 197, 0.3),
						0 0 0 20px rgba(79, 209, 197, 0.1);
		  }
		  to {
			box-shadow: 0 0 0 10px rgba(79, 209, 197, 0),
						0 0 0 20px rgba(79, 209, 197, 0),
						0 0 0 30px rgba(79, 209, 197, 0);
		  }
		}

		/* 移动端适配 */
		@media (max-width: 768px) {
		  .customer-service-btn {
			width: 60px;
			height: 60px;
			bottom: 20px;
			right: 20px;
		  }
		  
		  .notification-badge {
			width: 20px;
			height: 20px;
			font-size: 10px;
		  }
		  
		  .tooltip {
			display: none;
		  }
		}
/* 弹窗背景 */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(3px);
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.3s ease;
			z-index:1999;
        }

        /* 显示时的动画 */
        .modal.show {
            opacity: 1;
        }

        /* 弹窗内容 */
        .modal-content {
            background: linear-gradient(145deg, #ffffff, #f8f9ff);
            width: 90%;
            max-width: 500px;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            transform: scale(0.8);
            transition: transform 0.3s ease;
            position: relative;
        }

        .modal.show .modal-content {
            transform: scale(1);
        }

        /* 关闭按钮美化 */
        .close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 32px;
            height: 32px;
            background: #ff4757;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .close::before,
        .close::after {
            content: '';
            position: absolute;
            width: 16px;
            height: 2px;
            background: white;
        }

        .close::before {
            transform: rotate(45deg);
        }

        .close::after {
            transform: rotate(-45deg);
        }

        .close:hover {
            transform: rotate(90deg);
        }

        /* 内容样式 */
        .modal-content h2 {
            color: #2d3436;
            margin-bottom: 15px;
            font-size: 24px;
        }

        .modal-content p {
            color: #636e72;
            line-height: 1.6;
            font-size: 16px;
        }

        /* 响应式调整 */
        @media (max-width: 480px) {
            .modal-content {
                padding: 20px;
                width: 85%;
            }
            
            .modal-content h2 {
                font-size: 20px;
            }
        }
		a {
			cursor: pointer;
		}
		/* 新增加载动画样式 */
		.loading-screen {
			position: fixed;
			top: 0;
			left: 0;
			width: 100%;
			height: 100%;
			background: rgba(255,255,255,0.95);
			z-index: 9999;
			display: flex;
			justify-content: center;
			align-items: center;
			transition: opacity 0.5s ease;
		}

		.loader {
			position: relative;
			width: 120px;
			height: 120px;
		}

		.loader-inner {
			position: absolute;
			width: 100%;
			height: 100%;
			border: 4px solid transparent;
			border-top-color: var(--accent);
			border-radius: 50%;
			animation: spin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
		}

		@keyframes spin {
			0% { transform: rotate(0deg); }
			100% { transform: rotate(360deg); }
		}

		.loader-text {
			position: absolute;
			top: 50%;
			left: 50%;
			transform: translate(-50%, -50%);
			font-size: 1.4rem;
			font-weight: bold;
			color: var(--text);
			animation: pulse 1.5s ease-in-out infinite;
		}

		@keyframes pulse {
			0% { opacity: 0.8; transform: translate(-50%, -50%) scale(1); }
			50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
			100% { opacity: 0.8; transform: translate(-50%, -50%) scale(1); }
		}
		@keyframes popIn {
			0% { 
				transform: scale(0);
				opacity: 0;
			}
			80% {
				transform: scale(1.1);
				opacity: 1;
			}
			100% {
				transform: scale(1);
			}
		}