/* ===== 全局重置 & 基础 ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #1a3c6e;
            --primary-light: #2a5a9a;
            --primary-dark: #0f2642;
            --accent: #f5b342;
            --accent-light: #ffd966;
            --bg-light: #f8faff;
            --text-dark: #1e2a3a;
            --text-gray: #5a6b7c;
            --shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
            --radius: 20px;
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(145deg, var(--primary-light), var(--primary-dark));
            color: #fff;
            padding: 10px 10px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(26, 60, 110, 0.30);
            letter-spacing: 0.3px;
        }
        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 14px 36px rgba(26, 60, 110, 0.40);
        }
        .btn-primary i {
            font-size: 1.1rem;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            padding: 12px 32px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid var(--primary);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 顶部横幅 ===== */
        .top-banner {
            background: linear-gradient(90deg, var(--primary-dark), var(--primary-light));
            color: #fff;
            text-align: center;
            padding: 10px 16px;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .top-banner i {
            color: var(--accent);
            font-size: 1rem;
        }
        .top-banner strong {
            color: var(--accent-light);
        }

        /* ===== 全屏广告轮播 ===== */
        .ad-carousel {
            position: relative;
            width: 100%;
            height: 80vh;
            min-height: 300px;
            max-height: 800px;
            overflow: hidden;
            background: #0f2642;
        }
        .carousel-slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0;
            transition: opacity 1s ease;
            z-index: 1;
        }
        .carousel-slide.active {
            opacity: 1;
            z-index: 2;
        }
        .carousel-indicators {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 10;
            display: flex;
            gap: 12px;
        }
        .carousel-indicators .dot {
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.4);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .carousel-indicators .dot.active {
            background: #fff;
            border-color: var(--accent);
            transform: scale(1.2);
        }
        /* 左右箭头 (可选) */
        .carousel-arrow {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            z-index: 10;
            background: rgba(0, 0, 0, 0.3);
            color: #fff;
            border: none;
            font-size: 2.5rem;
            padding: 8px 16px;
            cursor: pointer;
            border-radius: 30px;
            transition: var(--transition);
        }
        .carousel-arrow:hover {
            background: rgba(0, 0, 0, 0.6);
        }
        .carousel-arrow.prev {
            left: 16px;
        }
        .carousel-arrow.next {
            right: 16px;
        }

        /* ===== 导航栏 ===== */
        .navbar {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-dark);
        }
        .logo i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .logo span {
            color: var(--primary-light);
            font-weight: 300;
        }
 @media (max-width: 1024px) {
            .logo span {
                font-weight: 100;
               font-size: 1.0rem;
            }
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .nav-links a {
            color: var(--text-gray);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary-dark);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 8px 22px;
            border-radius: 40px;
            font-weight: 600;
        }
 @media (max-width: 1024px) {
            .nav-cta {
                font-weight: 50;
               font-size: 1.0rem;
            }
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #fff !important;
        }

        .mobile-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--primary-dark);
            cursor: pointer;
            background: none;
            border: none;
        }

        /* ===== 英雄区 ===== */
        .hero {
            padding: 50px 0 60px;
            background: linear-gradient(135deg, #eef4ff 0%, #fff 70%);
            position: relative;
            overflow: hidden;
        }
        .hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.8rem;
            padding: 6px 18px;
            border-radius: 40px;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.15;
            color: var(--primary-dark);
        }
        .hero h1 span {
            color: var(--primary-light);
            background: linear-gradient(145deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-gray);
            margin: 20px 0 30px;
            max-width: 90%;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            gap: 30px;
            margin-top: 32px;
            padding-top: 28px;
            border-top: 1px solid rgba(0, 0, 0, 0.06);
        }
        .hero-stats div {
            text-align: left;
        }
        .hero-stats .num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-dark);
        }
        .hero-stats .label {
            font-size: 0.85rem;
            color: var(--text-gray);
        }

        .hero-image {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-image .main-img {
            width: 100%;
            max-width: 480px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: #fff;
            padding: 12px;
            transition: var(--transition);
        }
        .hero-image .float-badge {
            position: absolute;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            padding: 12px 18px;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.10);
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            animation: float 3s ease-in-out infinite;
        }
        .hero-image .float-badge i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .float-badge.b1 {
            top: 38%;
            right: 2%;
            animation-delay: 0s;
        }
        .float-badge.b2 {
            bottom: 30%;
            left: 0%;
            animation-delay: 1.2s;
        }

        @keyframes float {
            0%,
            100% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-10px);
            }
        }

        /* ===== 通用标题 ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--primary-dark);
        }
        .section-title p {
            color: var(--text-gray);
            font-size: 1.1rem;
            margin-top: 10px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-title .line {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            border-radius: 4px;
            margin: 14px auto 0;
        }

        /* ===== 功能亮点 ===== */
        .features {
            padding: 70px 0;
            background: #fff;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
        }
        .feature-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.03);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(26, 60, 110, 0.10);
        }
        .feature-card .icon {
            font-size: 2.6rem;
            color: var(--primary-light);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card p {
            color: var(--text-gray);
            font-size: 0.95rem;
        }

        /* ===== 图片画廊 ===== */
        .gallery {
            padding: 70px 0;
            background: var(--bg-light);
        }
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 18px;
        }
        .gallery-item {
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            aspect-ratio: 1/1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8px;
            border: 1px solid rgba(0, 0, 0, 0.04);
            cursor: pointer;
        }
        .gallery-item:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow);
        }
        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 12px;
        }

        /* ===== 产品展示 ===== */
        .showcase {
            padding: 70px 0;
            background: #fff;
        }
        .showcase .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .showcase-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 16px;
        }
        .showcase-content ul {
            list-style: none;
            margin: 20px 0 30px;
        }
        .showcase-content ul li {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            font-size: 1rem;
            color: var(--text-gray);
        }
        .showcase-content ul li i {
            color: var(--accent);
            font-size: 1.2rem;
            width: 24px;
            text-align: center;
        }
        .showcase-image img {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: #fff;
            padding: 12px;
            width: 100%;
        }

        /* ===== 技术规格 ===== */
        .specs {
            padding: 70px 0;
            background: var(--bg-light);
        }
        .specs-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
        }
        .spec-item {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }
        .spec-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .spec-item .value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-dark);
        }
        .spec-item .label {
            color: var(--text-gray);
            font-size: 0.9rem;
            margin-top: 4px;
        }
        .spec-item i {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== 用户评价 ===== */
        .testimonials {
            padding: 70px 0;
            background: #fff;
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
        }
        .testimonial-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .testimonial-card .stars {
            color: var(--accent);
            letter-spacing: 2px;
            font-size: 1.1rem;
            margin-bottom: 10px;
        }
        .testimonial-card p {
            font-size: 0.98rem;
            color: var(--text-gray);
            font-style: italic;
        }
        .testimonial-card .author {
            margin-top: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .author img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
        }

        /* ===== CTA ===== */
        .cta {
            padding: 70px 0 80px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            color: #fff;
            text-align: center;
        }
        .cta h2 {
            font-size: 2.6rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta p {
            font-size: 1.15rem;
            opacity: 0.85;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.20);
        }
        .cta .btn-primary:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.30);
        }
        .cta .price-tag {
            font-size: 2rem;
            font-weight: 700;
            background: rgba(255, 255, 255, 0.12);
            padding: 6px 28px;
            border-radius: 60px;
            display: inline-block;
            margin-bottom: 24px;
        }
        .cta .price-tag small {
            font-size: 1rem;
            font-weight: 400;
            opacity: 0.7;
            margin-left: 8px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 40px 0 24px;
        }
        .footer .container {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
        }
        .footer-col {
            flex: 1 1 30px;
        }
        .footer-col h4 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 12px;
            font-size: 1rem;
        }
        .footer-col a {
            display: block;
            padding: 1px 0;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 6px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 32px;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 模态框通用 ===== */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.75);
            z-index: 9999;
            justify-content: center;
            align-items: center;
            animation: fadeIn 0.3s;
        }
        .modal.active {
            display: flex;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }
        .modal-content {
            position: relative;
            max-width: 90%;
            max-height: 90%;
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .close-modal {
            position: absolute;
            top: 12px;
            right: 20px;
            font-size: 2.5rem;
            font-weight: 300;
            color: #333;
            cursor: pointer;
            transition: var(--transition);
            z-index: 10;
            line-height: 1;
            background: rgba(255, 255, 255, 0.6);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .close-modal:hover {
            color: #000;
            transform: rotate(90deg);
            background: rgba(255, 255, 255, 0.9);
        }

        /* 视频模态框 */
        .video-wrapper {
            width: 100%;
            max-width: 800px;
            aspect-ratio: 9/16 ;
        }
        .video-wrapper iframe {
            width: 100%;
            height: 100%;
            border: 0;
            border-radius: 12px;
        }

        /* 图片模态框 */
        .image-modal-content {
            background: transparent;
            box-shadow: none;
            padding: 0;
            max-width: 95vw;
            max-height: 95vh;
        }
        .image-viewer {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            height: 100%;
        }
        .image-viewer img {
            max-width: 90vw;
            max-height: 85vh;
            border-radius: 12px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            background: #fff;
            padding: 4px;
        }
        .image-viewer .prev-btn,
        .image-viewer .next-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background: rgba(0, 0, 0, 0.4);
            color: #fff;
            border: none;
            font-size: 2.8rem;
            padding: 8px 18px;
            cursor: pointer;
            border-radius: 40px;
            transition: var(--transition);
            z-index: 5;
            backdrop-filter: blur(4px);
        }
        .image-viewer .prev-btn:hover,
        .image-viewer .next-btn:hover {
            background: rgba(0, 0, 0, 0.7);
        }
        .image-viewer .prev-btn {
            left: 10px;
        }
        .image-viewer .next-btn {
            right: 10px;
        }
        .image-counter {
            color: #fff;
            background: rgba(0, 0, 0, 0.5);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            margin-top: 12px;
            backdrop-filter: blur(4px);
        }
        /* 关闭按钮在图片模态框内调整 */
        .image-modal-content .close-modal {
            color: #fff;
            background: rgba(0, 0, 0, 0.3);
            top: 16px;
            right: 16px;
        }
        .image-modal-content .close-modal:hover {
            background: rgba(0, 0, 0, 0.6);
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.6rem;
            }
            .gallery-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .hero .container {
                gap: 30px;
            }
            .ad-carousel {
                height: 50vh;
                max-height: 400px;
            }
        }

        @media (max-width: 860px) {
            .hero .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero p {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .hero-image .main-img {
                max-width: 380px;
            }
            .float-badge.b1,
            .float-badge.b2 {
                display: none;
            }

            .showcase .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .showcase-content ul li {
                justify-content: center;
            }
            .showcase-image {
                order: -1;
            }

            .gallery-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .section-title h2 {
                font-size: 2rem;
            }
            .navbar .container {
                flex-wrap: nowrap;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                padding: 20px 0;
                border-radius: 16px;
                box-shadow: var(--shadow);
                margin-top: 12px;
                gap: 16px;
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-cta {
                display: inline-block;
            }
            .cta h2 {
                font-size: 2rem;
            }
            .ad-carousel {
                height: 40vh;
                max-height: 300px;
            }
            .carousel-arrow {
                font-size: 1.8rem;
                padding: 4px 12px;
            }
        }

        @media (max-width: 600px) {
            .hero h1 {
                font-size: 2rem;
            }
            .hero {
                padding: 30px 0 40px;
            }
            .gallery-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }
            .gallery-item {
                aspect-ratio: 1/1;
                padding: 4px;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .specs-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .btn-primary {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            .container {
                padding: 0 16px;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
            .hero-stats .num {
                font-size: 1.4rem;
            }
            .cta .price-tag {
                font-size: 1.6rem;
                padding: 4px 20px;
            }
            .footer .container {
                flex-direction: column;
                gap: 20px;
            }
            .ad-carousel {
                height: 30vh;
                max-height: 250px;
            }
            .image-viewer .prev-btn,
            .image-viewer .next-btn {
                font-size: 2rem;
                padding: 4px 12px;
            }
        }

        @media (max-width: 420px) {
            .gallery-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .feature-card {
                padding: 20px 14px;
            }
            .feature-card .icon {
                font-size: 2rem;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
        }