* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
        }

        :root {
            --primary: #0F4C81; /* 深海蓝，专业稳重 */
            --secondary: #1E88E5; /* 科技蓝，活力高效 */
            --accent: #FF6B35; /* 活力橙，突出亮点 */
            --text-dark: #1A1A1A;
            --text-gray: #666666;
            --text-light: #999999;
            --bg-light: #F5F7FA;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(15, 76, 129, 0.12);
            --radius: 12px;
            --radius-sm: 8px;
        }

        /* 全局滚动条美化 */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-light);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }

        /* 导航栏 */
        nav {
            background: var(--white);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .nav-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 1.2rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
        }
        .nav-links {
            display: flex;
            gap: 2.5rem;
            list-style: none;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            font-size: 1rem;
            transition: color 0.3s ease;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--secondary);
        }

        /* Hero区 */
        .hero {
/*            background: linear-gradient(135deg, var(--primary) 0%, #0A3A63 100%); */
			background: linear-gradient(135deg, rgba(0, 102, 179, 0.9), rgba(0, 153, 204, 0.85)), url(https://images.unsplash.com/photo-1589394815804-964ed0be2eb0?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80);
            color: var(--white);
            padding: 6rem 2rem 5rem;
            text-align: center;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.15rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            line-height: 1.6;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 4rem;
            flex-wrap: wrap;
        }
        .stat-item {
            text-align: center;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 0.3rem;
        }
        .stat-label {
            font-size: 0.95rem;
            opacity: 0.85;
        }

        /* 案例筛选区（可选，预留） */
        .filter {
            max-width: 1280px;
            margin: 3rem auto 0;
            padding: 0 2rem;
            display: none; /* 暂时隐藏，案例少不需要 */
        }

        /* 案例展示区 */
        .cases {
            max-width: 1280px;
            margin: 4rem auto 6rem;
            padding: 0 2rem;
        }
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(580px, 1fr));
            gap: 2.5rem;
        }
        .case-card {
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .case-header {
            padding: 2rem 2rem 1.5rem;
            border-bottom: 1px solid var(--bg-light);
        }
        .case-tags {
            display: flex;
            gap: 0.8rem;
            margin-bottom: 1.2rem;
            flex-wrap: wrap;
        }
        .tag {
            padding: 0.35rem 0.9rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        .tag-route {
            background: #E3F2FD;
            color: var(--secondary);
        }
        .tag-service {
            background: #FFF3E0;
            color: var(--accent);
        }
        .tag-goods {
            background: #F5F7FA;
            color: var(--text-gray);
        }
        .case-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }
        .case-subtitle {
            font-size: 0.95rem;
            color: var(--text-gray);
        }
        .case-body {
            padding: 1.8rem 2rem 2rem;
        }
        .case-section {
            margin-bottom: 1.5rem;
        }
        .case-section:last-child {
            margin-bottom: 0;
        }
        .section-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .section-title::before {
            content: '';
            width: 4px;
            height: 16px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-content {
            font-size: 0.98rem;
            color: var(--text-dark);
            line-height: 1.7;
        }
        .highlight-list {
            list-style: none;
            padding-left: 0;
        }
        .highlight-list li {
            padding-left: 1.5rem;
            margin-bottom: 0.6rem;
            position: relative;
            color: var(--text-dark);
            line-height: 1.6;
        }
        .highlight-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: 700;
        }
        .result-box {
            background: linear-gradient(135deg, #F5F7FA 0%, #E8F0FE 100%);
            padding: 1.2rem 1.5rem;
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--secondary);
        }
        .result-text {
            font-size: 0.98rem;
            color: var(--text-dark);
            font-weight: 500;
        }

        /* 页脚 */
        footer {
            background: var(--text-dark);
            color: var(--white);
            padding: 4rem 2rem 2rem;
        }
        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 1rem;
        }
        .footer-desc {
            font-size: 0.95rem;
            color: #CCCCCC;
            line-height: 1.6;
        }
        .footer-section h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            color: var(--white);
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section ul li {
            margin-bottom: 0.7rem;
        }
        .footer-section a {
            color: #CCCCCC;
            text-decoration: none;
            font-size: 0.95rem;
            transition: color 0.3s ease;
        }
        .footer-section a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            max-width: 1280px;
            margin: 0 auto;
            padding-top: 2rem;
            border-top: 1px solid #333333;
            text-align: center;
            color: #999999;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 1200px) {
            .case-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-stats {
                gap: 2rem;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .nav-links {
                display: none;
            }
            .case-header,
            .case-body {
                padding: 1.5rem;
            }
        }