/* -------------------- 全局样式 -------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
    scroll-behavior: smooth;
}
body {
    background: #0a0a0a; 
    color: #fff;
    line-height: 1.8;
    overflow-x: hidden;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}
.section {
    padding: 120px 0;
    position: relative;
}
h1 { font-size: clamp(2.5rem, 8vw, 5rem); font-weight: 900; line-height: 1.1; }
h2 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: 60px; text-align: center; }
h3 { font-size: 1.5rem; margin-bottom: 15px; }
.blue-highlight { color: #007BFF; 
    background: -webkit-linear-gradient(45deg, #007BFF, #00E5FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
            
        }
        .text-gradient {
            background: linear-gradient(45deg, #007BFF, #00E5FF);
            -webkit-background-clip: text;
            color: transparent;
        }
        .white-bg { background: rgba(255,255,255,0.05); } 
        .white-border { border: 1px solid rgba(255,255,255,0.1); } 

        /* -------------------- 导航栏优化 -------------------- */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            padding: 25px 50px;
            z-index: 1000;
            backdrop-filter: blur(20px);
            background: rgba(10,10,10,0.9); 
            transition: all 0.3s;
            border-bottom: 1px solid rgba(255,255,255,0.05); 
        }
        .navbar.scrolled {
            padding: 15px 50px;
            background: rgba(10,10,10,0.95); 
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .nav-logo {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            transition: transform 0.3s;
            font-style: italic;
        }
        .nav-logo:hover {
            transform: scale(1.05);
        }
        .nav-logo i {
            margin-right: 10px;
            color: #007BFF;
        }
        .nav-links {
            display: flex;
            gap: 40px;
        }
        .nav-links a {
            color: #fff;
            text-decoration: none;
            font-weight: 500;
            position: relative;
            padding: 5px 0;
            transition: all 0.3s;
        }
        .nav-links a:hover {
            color: #007BFF;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: #007BFF;
            transition: width 0.3s;
        }
        .nav-links a:hover::after { width: 100%; }
        
        /* 移动端导航增强 */
        .mobile-menu-button {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #fff;
        }
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -300px;
            width: 300px;
            height: 100%;
            background: rgba(10,10,10,0.95); 
            z-index: 1001;
            padding: 50px;
            transition: right 0.3s;
            backdrop-filter: blur(20px);
            border-left: 1px solid rgba(255,255,255,0.05); 
        }
        .mobile-nav.active {
            right: 0;
        }
        .mobile-nav .close-button {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 1.5rem;
            cursor: pointer;
            color: #fff;
            transition: transform 0.3s;
        }
        .mobile-nav .close-button:hover {
            transform: rotate(90deg);
        }
        .mobile-nav-links {
            display: flex;
            flex-direction: column;
            gap: 30px;
            margin-top: 30px;
        }
        .mobile-nav-links a {
            color: #fff;
            text-decoration: none;
            font-size: 1.2rem;
            transition: all 0.3s;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .mobile-nav-links a:hover {
            color: #007BFF;
            padding-left: 10px;
        }

        /* -------------------- 英雄页面增强 -------------------- */
        .hero {
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, rgba(10,10,10,0.6), rgba(10,10,10,0.9)); 
            z-index: 1;
        }
        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
            filter: grayscale(100%) brightness(40%); 
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 1200px;
            padding: 0 20px;
        }
        .hero-title {
            text-shadow: 0 0 30px rgba(0, 123, 255, 0.5);
            margin-bottom: 30px;
            animation: glow 2s ease-in-out infinite alternate;
        }
        @keyframes glow {
            from { text-shadow: 0 0 10px rgba(0, 123, 255, 0.3); }
            to { text-shadow: 0 0 30px rgba(0, 123, 255, 0.7); }
        }
        .hero-subtitle {
            font-size: clamp(1.2rem, 3vw, 1.8rem);
            color: rgba(255,255,255,0.9);
            margin-bottom: 60px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }
        .primary-btn {
            background: linear-gradient(45deg, #007BFF, #0056B3);
            color: #fff;
            padding: 20px 60px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            box-shadow: 0 8px 30px rgba(0,123,255,0.4);
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255,255,255,0.1); 
        }
        .primary-btn::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,0) 100%);
            transform: rotate(30deg);
            animation: shine 3s infinite;
        }
        @keyframes shine {
            0% { transform: translateX(-100%) rotate(30deg); }
            100% { transform: translateX(100%) rotate(30deg); }
        }
        .primary-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0,123,255,0.6);
            border-color: rgba(255,255,255,0.2); 
        }
        .scroll-indicator {
            position: absolute;
            bottom: 50px;
            left: 50%;
            transform: translateX(-50%);
            animation: bounce 2s infinite;
            color: #fff;
            background: rgba(255,255,255,0.1); 
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255,255,255,0.1); 
        }
        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
            40% { transform: translateY(-20px) translateX(-50%); }
            60% { transform: translateY(-10px) translateX(-50%); }
        }

        /* -------------------- 数据统计增强 -------------------- */
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin: 100px 0;
        }
        .stat-item {
            background: rgba(255,255,255,0.05); 
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            transition: all 0.3s;
            border: 1px solid rgba(255,255,255,0.1); 
        }
        .stat-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, #007BFF, #00E5FF);
        }
        .stat-item:hover {
            transform: translateY(-10px);
            background: rgba(255,255,255,0.08); 
            border-color: rgba(255,255,255,0.15); 
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 900;
            margin-bottom: 10px;
            color: #fff;
            text-shadow: 0 0 15px rgba(0,123,255,0.5);
        }
        .stat-label {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.8); 
        }
        .stat-item i {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 2.5rem;
            opacity: 0.05;
        }

        /* -------------------- 3D模型增强 -------------------- */
        #3d-container {
            height: 600px;
            position: relative;
            background: rgba(255,255,255,0.01);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(0,0,0,0.5);
        }
        .model-controls {
            position: absolute;
            bottom: 30px;
            right: 30px;
            display: flex;
            gap: 10px;
            z-index: 10;
        }
        .model-control {
            background: rgba(255,255,255,0.1); 
            color: #fff;
            border: 1px solid rgba(255,255,255,0.2); 
            padding: 12px 18px;
            border-radius: 50%;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 1.2rem;
        }
        .model-control:hover {
            background: #007BFF;
            border-color: #007BFF;
            transform: scale(1.1);
        }

        /* -------------------- 产品分类增强 -------------------- */
        .product-categories {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 50px;
        }
        .category-card {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0,0,0,0.3);
            transition: all 0.5s;
            transform-style: preserve-3d;
            background: rgba(255,255,255,0.03); 
        }
        .category-card:hover {
            transform: translateY(-15px) rotateY(5deg);
            box-shadow: 0 20px 40px rgba(0,0,0,0.5);
            background: rgba(255,255,255,0.05); 
        }
        .category-image {
            height: 280px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .category-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.8) 100%); 
        }
        .category-content {
            padding: 30px;
            position: relative;
            background: rgba(255,255,255,0.05); 
        }
        .category-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: #fff;
        }
        .category-desc {
            color: rgba(255,255,255,0.8); 
            margin-bottom: 20px;
        }
        .category-link {
            color: #007BFF;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            transition: all 0.3s;
        }
        .category-link:hover {
            color: #00E5FF;
            transform: translateX(5px);
        }
        .category-link i {
            margin-left: 5px;
        }

        /* -------------------- 解决方案增强 -------------------- */
        .solution {
            background: linear-gradient(rgba(10,10,10,0.9), rgba(10,10,10,0.95)), 
                        url('https://picsum.photos/id/1/1920/1080');
            background-size: cover;
            background-attachment: fixed;
            position: relative;
        }
        .solution::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 50% 50%, rgba(0,123,255,0.1) 0%, rgba(0,0,0,0) 70%);
        }
        .solution-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 50px;
        }
        .solution-card {
            background: rgba(255,255,255,0.05); 
            border-radius: 20px;
            padding: 50px 40px;
            position: relative;
            border: 1px solid rgba(255,255,255,0.1); 
            transition: all 0.3s;
            backdrop-filter: blur(15px);
        }
        .solution-card:hover {
            background: rgba(255,255,255,0.08); 
            transform: translateY(-10px);
            border-color: rgba(255,255,255,0.15); 
        }
        .solution-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 50% 50%, rgba(0,123,255,0.08) 0%, transparent 70%);
            opacity: 0;
            transition: opacity 0.3s;
        }
        .solution-card:hover::before {
            opacity: 1;
        }
        .solution-icon {
            font-size: 3rem;
            color: #007BFF;
            margin-bottom: 30px;
            transition: transform 0.3s;
        }
        .solution-card:hover .solution-icon {
            transform: rotate(360deg);
        }
        .solution-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: #fff;
        }
        .solution-desc {
            color: rgba(255,255,255,0.8); 
            margin-bottom: 30px;
        }
        .solution-list {
            list-style: none;
            margin-bottom: 30px;
        }
        .solution-list li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            color: rgba(255,255,255,0.85); 
        }
        .solution-list li i {
            color: #007BFF;
            margin-right: 10px;
        }

        /* -------------------- 客户案例优化 -------------------- */
        .case-studies {
            overflow: hidden;
        }
        .case-slider {
            display: flex;
            gap: 30px;
            animation: slide 30s linear infinite;
        }
        .case-slider:hover {
            animation-play-state: paused;
        }
        @keyframes slide {
            0% { transform: translateX(0); }
            100% { transform: translateX(-190%); }
        }
        .case-card {
            min-width: 350px;
            background: rgba(255,255,255,0.05); 
            border-radius: 15px;
            padding: 40px;
            transition: all 0.3s;
            border: 1px solid rgba(255,255,255,0.1); 
        }
        .case-card:hover {
            background: rgba(255,255,255,0.08); 
            transform: translateY(-5px);
            border-color: rgba(255,255,255,0.15); 
        }
        .case-logo {
            height: 90px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .case-logo img {
            max-height: 100%;
            max-width: 100%;
            filter: grayscale(100%) brightness(180%); 
            transition: all 0.3s;
        }
        .case-card:hover .case-logo img {
            filter: grayscale(0%) brightness(100%);
        }
        .case-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #fff;
        }
        .case-desc {
            color: rgba(255,255,255,0.8); 
            font-size: 0.9rem;
        }

        /* -------------------- 时间轴优化 -------------------- */
        .about-timeline {
            /*max-width: 1200px;*/
            margin: 0 auto;
            position: relative;
        }
        .about-timeline::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 100%;
            background: linear-gradient(to bottom, rgba(0,123,255,0.3), rgba(0,123,255,0.8), rgba(0,123,255,0.3));
        }
        .timeline-item {
            margin: 60px 0;
            position: relative;
            width: 50%;
            padding: 0 40px;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-item:nth-child(odd) {
            text-align: right;
        }
        .timeline-dot {
            position: absolute;
            top: 0;
            width: 20px;
            height: 20px;
            background: #007BFF;
            border-radius: 50%;
            box-shadow: 0 0 15px rgba(0,123,255,0.7);
        }
        .timeline-item:nth-child(odd) .timeline-dot {
            right: -10px;
        }
        .timeline-item:nth-child(even) .timeline-dot {
            left: -10px;
        }
        .timeline-content {
            background: rgba(255,255,255,0.05); 
            border-radius: 15px;
            padding: 40px;
            transition: all 0.3s;
            border: 1px solid rgba(255,255,255,0.1); 
        }
        .timeline-item:hover .timeline-content {
            background: rgba(255,255,255,0.08); 
            transform: translateY(-5px);
            border-color: rgba(255,255,255,0.15); 
        }
        .timeline-year {
            font-size: 1.5rem;
            font-weight: 700;
            color: #007BFF;
            margin-bottom: 10px;
            background: -webkit-linear-gradient(50deg, #007BFF, #00E5FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
        }
        .timeline-desc {
            color: rgba(255,255,255,0.8); 
            margin: 10px 0 10px 0;
            line-height: 32px;
        }

        /* -------------------- 联系表单增强 -------------------- */
        .contact-form {
            max-width: 800px;
            margin: 0 auto;
            background: rgba(255,255,255,0.05); 
            border-radius: 20px;
            padding: 70px;
            backdrop-filter: blur(10px);
            box-shadow: 0 20px 50px rgba(0,0,0,0.3);
        }
        .form-group {
            margin-bottom: 30px;
        }
        .form-label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: #fff;
        }
        input, textarea {
            width: 100%;
            padding: 18px 25px; /* 修正原代码中的笔误（255px → 25px） */
            background: rgba(255,255,255,0.05); 
            border: 1px solid rgba(255,255,255,0.1); 
            border-radius: 10px;
            color: #fff;
            font-size: 1rem;
            transition: all 0.3s;
        }
        input:focus, textarea:focus {
            outline: none;
            border-color: #007BFF;
            box-shadow: 0 0 15px rgba(0,123,255,0.2);
            background: rgba(255,255,255,0.05); 
            transform: translateY(-3px);
        }
        button[type="submit"] {
            width: 100%;
            padding: 20px;
            background: linear-gradient(45deg, #007BFF, #0056B3);
            color: #fff;
            border: none;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255,255,255,0.1); 
        }
        button[type="submit"]::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,0) 100%);
            transform: rotate(30deg);
            animation: shine 3s infinite;
        }
        button[type="submit"]:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,123,255,0.4);
            border-color: rgba(255,255,255,0.2); 
        }

        /* -------------------- 页脚优化 -------------------- */
        footer {
            padding: 80px 0 30px;
            background: rgba(255,255,255,0.02); 
            border-top: 1px solid rgba(255,255,255,0.05); 
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 50px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 30px;
            display: flex;
            align-items: center;
            color: #fff;
            font-style: italic;
            text-decoration: none;
        }
        .footer-logo i {
            margin-right: 10px;
            color: #007BFF;
        }
        .footer-desc {
            color: rgba(255,255,255,0.8); 
            margin-bottom: 30px;
        }
        .social-links {
            display: flex;
            gap: 20px;
        }
        .social-links a{
            text-decoration: none;
        }
        .social-link {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.05); 
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.8); 
            transition: all 0.3s;
            border: 1px solid rgba(255,255,255,0.05); 
        }
        .social-link:hover {
            background: #007BFF;
            color: #fff;
            transform: translateY(-3px);
            border-color: rgba(0,123,255,0.3);
        }
        .footer-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 30px;
            color: #fff;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 15px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.8); 
            text-decoration: none;
            transition: all 0.3s;
        }
        .footer-links a:hover {
            color: #007BFF;
            transform: translateX(5px);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            color: rgba(255,255,255,0.8); 
        }
        .footer-contact i {
            margin-right: 10px;
            color: #007BFF;
        }
        .copyright {
            text-align: center;
            margin-top: 80px;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.05); 
            color: rgba(255,255,255,0.6); 
        }

        /* -------------------- 回到顶部按钮 -------------------- */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: #007BFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000; /* 修正原代码中的笔误（z1-index → z-index） */
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
            transform: translateY(-10px);
        }
        .back-to-top:hover {
            background: #0056B3;
            transform: translateY(-15px);
        }

        /* -------------------- 移动端适配优化 -------------------- */
        @media (max-width: 992px) {
            .product-categories {
                grid-template-columns: 1fr;
            }
            .category-card {
                max-width: 500px;
                margin: 0 auto;
            }
            .case-slider {
                animation: slide 25s linear infinite;
            }
        }
        @media (max-width: 768px) {
            .navbar {
                padding: 15px 20px;
            }
            .navbar.scrolled {
                padding: 10px 20px;
            }
            .nav-links {
                display: none;
            }
            .mobile-menu-button {
                display: block;
            }
            .hero-title {
                font-size: 2.8rem;
            }
            .contact-form {
                padding: 40px 30px;
            }
            #3d-container {
                height: 350px;
            }
            .stats {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 2rem;
            }
            .timeline-item {
                width: 100%;
                padding: 0;
                margin: 50px 0;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-item:nth-child(odd) {
                text-align: left;
            }
            .timeline-item:nth-child(odd) .timeline-dot,
            .timeline-item:nth-child(even) .timeline-dot {
                left: -10px;
            }
            .about-timeline::before {
                left: 0;
            }
            
        }
        .text-center{
            margin: 10px;
        }
        
        .hout{
            text-decoration: none;
            color: rgba(255, 255, 255, 0.9);
        }
        
        
        
        /* ==============================================
   核心产品技术板块样式（暗色高端版）
   ============================================== */
#core-tech {
    padding: 80px 0;
    background: 
        linear-gradient(180deg, rgba(15, 15, 15, 0.9) 0%, rgba(20, 20, 20, 0.95) 100%),
        url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQIW2NkQAL/YaCG4d8Tq1BQkA1EkgpAAQAEADMEbwIvcE8AAAAASUVORK5CYII=');
    background-size: cover;
    position: relative;
    
    &::before, &::after {
        content: '';
        position: absolute;
        left: 0;
        width: 100%;
        height: 1px;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    }
    &::before { top: 0; }
    &::after { bottom: 0; }
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    padding: 0 10px;
}

.tech-card {
    background: rgba(255, 255, 255, 0.03); /* 更暗的卡片背景 */
    border: 1px solid rgba(255, 255, 255, 0.08); /* 更细的浅色边框 */
    border-radius: 12px;
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    
    &::before {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: linear-gradient(45deg, #007BFF, #00E5FF);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.3s ease;
    }
}

.tech-card:hover {
    background: rgba(255, 255, 255, 0.05); /* 悬停时背景稍亮 */
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 123, 255, 0.15); /* 更明显的蓝色阴影 */
    
    &::before {
        transform: scaleX(1);
    }
}
i{
    font-size: 2.5rem; /* 若用Font Awesome，保留此属性 */
    background: -webkit-linear-gradient(45deg, #007BFF, #00E5FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
/* 图标（Font Awesome 或 SVG） */
.tech-card i, .custom-icon {
    font-size: 2.5rem; /* 若用Font Awesome，保留此属性 */
    background: -webkit-linear-gradient(45deg, #007BFF, #00E5FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
}

.tech-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.95); /* 标题更清晰 */
}

.tech-card p {
    color: rgba(255, 255, 255, 0.7); /* 描述稍浅，突出标题 */
    font-size: 0.95rem;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .tech-grid {
        grid-template-columns: 1fr;
        padding: 0;
    }
    .tech-card {
        padding: 2rem 1.5rem;
    }
}
.logo{
    width: 13rem;
}