:root {
            /* 品牌主色 */
            --primary-blue: #1a5fb4;
            --primary-red: #e01b24;

            /* 基础色板 */
            --blue-100: #d4e2f7;
            --blue-500: var(--primary-blue);
            --blue-700: #0e3a7a;
            --red-100: #f9d6d8;
            --red-500: var(--primary-red);
            --red-700: #a0131a;
            --gray-100: #f5f5f5;
			--gray-300: #c1c1c1;
            --gray-500: #666666;
            --gray-700: #333333;
            --white: #ffffff;
            --black: #000000;

            /* 语义化颜色变量 */
            --color-primary: var(--blue-500);
            --color-secondary: var(--red-500);
            --color-text-dark: var(--gray-700);
            --color-text-light: var(--white);
            --color-bg-default: var(--white);
            --color-bg-alt: var(--gray-100);
            --color-border: var(--gray-100);

            /* 间距系统 */
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;

            /* 字体与排版 */
            --font-family-base: "Helvetica Neue", Arial, sans-serif;
            --font-size-base: 16px;
            --line-height-base: 1.5;
        }

        /* 重置样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        ul, ol, li {
            list-style: none;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        h1, h2, h3, h4, h5, h6, p {
            margin: 0;
            font-weight: normal;
        }

        img {
            display: block;
            max-width: 100%;
            border: none;
        }

        body {
            font-family: var(--font-family-base);
            font-size: var(--font-size-base);
            line-height: var(--line-height-base);
            color: var(--color-text-dark);
            background-color: var(--color-bg-default);
            padding-top: 80px;
            position: relative;
        }

        /* 容器 */
        .container {
            margin: 0 auto;
            padding-left: 15px;
            padding-right: 15px;
			max-width: 1200px;
        }

        /* 头部导航 */
        .header {
            position: fixed;
            top: 0;
            width: 100%;
            background-color: var(--color-bg-default);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            z-index: 2000;
        }

        .header .navigation {
            display: flex;
            flex-flow: row nowrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            text-align: left;
        }

        /* 品牌标识 */
        .header .brand {
            display: flex;
            align-items: center;
        }

        .header .logo {
            display: flex;
            align-items: center;
            font-weight: bold;
            font-size: 32px;
        }

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

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

        .header .tagline {
            margin-left: var(--spacing-md);
            font-size: 14px;
            color: var(--gray-500);
            border-left: 1px solid var(--color-border);
            padding-left: var(--spacing-md);
        }

        /* 桌面端导航 */
        .header .nav {
            display: flex;
            align-items: center;
        }

        .header .navlist {
            display: flex;
            flex-flow: row nowrap;
        }

        .header .navlist > li {
            position: relative;
        }

        .header .navlist > li > a {
            display: block;
            padding: var(--spacing-md) var(--spacing-lg);
            font-weight: 500;
            color: var(--color-text-dark);
            transition: all 0.3s ease;
        }

        .header .navlist > li > a:hover {
            color: var(--color-primary);
        }
		/* 新增：当前页高亮样式 */
		.header .navlist > li > a.active {
		    color: var(--color-primary);
		    background-color: var(--color-bg-alt);
		    border-radius: 4px;
		}
		
		/* 二级菜单当前页高亮样式 */
		.header .submenu li a.active {
		    color: var(--color-primary);
		    font-weight: bold;
		    background-color: var(--color-bg-alt);
		}
        /* 二级菜单 */
        .header .submenu {
            position: absolute;
            top: 100%;
            left: 0;
            width: 280px;
            background: var(--color-bg-default);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            border-radius: 0 0 4px 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;
            z-index: 1000;
        }

        .header .navlist > li:hover .submenu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .header .submenu li a {
            display: block;
            padding: var(--spacing-sm) var(--spacing-sm);
            border-bottom: 1px solid var(--color-border);
            color: var(--color-text-dark);
            transition: all 0.3s ease;
        }

        .header .submenu li:last-child a {
            border-bottom: none;
        }

        .header .submenu li a:hover {
            background-color: var(--color-bg-alt);
            color: var(--color-primary);
        }

        /* 移动端菜单按钮 */
        .header .open, .header .close {
            display: none;
            width: 24px;
            height: 24px;
            cursor: pointer;
        }

        /* 遮罩层样式 */
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* 移动端样式 */
        @media (max-width: 1373px) {
            body {
                padding-top: 64px;
            }

            .header .navigation {
                height: 64px;
            }

            .header .tagline {
                display: none;
            }

            .header .open {
                display: block;
            }

            .header .nav {
                position: fixed;
                top: 0;
                left: -100%;
                width: 85%;
                height: 100vh;
                background-color: var(--color-bg-default);
                flex-direction: column;
                align-items: flex-start;
                padding: var(--spacing-lg);
                transition: left 0.3s ease;
                z-index: 2001;
                overflow-y: auto;
                box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
            }

            .header .nav.active {
                left: 0;
            }

            .header .close {
                display: block;
                position: absolute;
                top: var(--spacing-lg);
                right: var(--spacing-lg);
            }

            .header .navlist {
                flex-direction: column;
                width: 100%;
                margin-top: var(--spacing-xl);
            }

            .header .navlist > li {
                width: 100%;
                border-bottom: 1px solid var(--color-border);
            }

            .header .navlist > li > a {
                padding: var(--spacing-md) 0;
                display: flex;
                justify-content: space-between;
                align-items: center;
            }
			.header .navlist > li > a.active {
				background-color: transparent;
				color: var(--color-primary);
			}
            .header .submenu {
                position: static;
                width: 100%;
                box-shadow: none;
                opacity: 1;
                visibility: visible;
                transform: none;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s ease;
            }

            .header .submenu.active {
                max-height: 500px;
            }

            .header .submenu li a {
                padding-left: var(--spacing-lg);
            }
        }

/* 页脚样式 */
.footer {
  background-color: var(--color-text-dark);
  color: var(--color-bg-alt);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 40px;
}

.footer-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-text-light);
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--primary-blue);
}

.footer-content {
  font-size: 14px;
  line-height: 1.6;
}

.contact-info {
  margin-top: 15px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 12px;
  font-size: 14px;
}

.contact-icon {
  margin-right: 10px;
  margin-top: 2px;
  flex-shrink: 0;
  color: var(--primary-blue);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--color-bg-alt);
  font-size: 14px;
  transition: color 0.3s ease;
  position: relative;
  padding-left: 15px;
}

.footer-links a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background-color: var(--primary-blue);
  border-radius: 50%;
  transition: all 0.3s ease;
}

.footer-links a:hover {
  color: var(--color-text-light);
  padding-left: 20px;
}

.footer-links a:hover::before {
  width: 8px;
  height: 8px;
}

.footer-button {
  display: inline-block;
  background-color: var(--primary-blue);
  color: var(--color-text-light);
  padding: 10px 20px;
  border-radius: 4px;
  font-weight: 500;
  margin-top: 15px;
  transition: all 0.3s ease;
  text-align: center;
  font-size: 14px;
}

.footer-button:hover {
  background-color: var(--blue-700);
  transform: translateY(-2px);
}

.social-links {
  display: flex;
  margin-top: 20px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  margin-right: 10px;
  transition: all 0.3s ease;
  color: var(--color-bg-alt);
}

.social-link:hover {
  background-color: var(--primary-blue);
  color: var(--color-text-light);
  transform: translateY(-2px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 14px;
}

.footer-links-bottom {
  display: flex;
}

.footer-links-bottom a {
  margin-left: 20px;
  color: var(--color-bg-alt);
  transition: color 0.3s ease;
}

.footer-links-bottom a:hover {
  color: var(--color-text-light);
}

/* 响应式设计 */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .footer {
    padding: 40px 0 20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links-bottom {
    margin-top: 15px;
    justify-content: center;
  }
  
  .footer-links-bottom a {
    margin: 0 10px;
  }
}

@media (max-width: 576px) {
  .footer {
    padding: 30px 0 15px;
  }
  
  .footer-grid {
    gap: 25px;
  }
  
  .footer-title {
    font-size: 16px;
  }
  
  .footer-content, 
  .footer-links a,
  .contact-item,
  .footer-bottom {
    font-size: 13px;
  }
}