/* ===== HERO 首屏 ===== */
        .hero {
            padding: 80px 0;
            background: #fafaf9;
            border-bottom: 1px solid #f3f4f6;
            text-align: center;
        }
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }
        .hero-content .sub-title {
            font-size: 18px;
            color: #64748b;
            margin-bottom: 12px;
            font-weight: 500;
            letter-spacing: 2px;
        }
        .hero-content h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            color: #0f172a;
            margin-bottom: 16px;
        }
        .hero-content h1 .highlight {
            color: #d97706;
        }
        .hero-content p {
            font-size: 18px;
            color: #475569;
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-meta {
            display: flex;
            justify-content: center;
            gap: 60px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid #e2e8f0;
        }
        .hero-meta div strong {
            display: block;
            font-size: 28px;
            font-weight: 700;
            color: #0f172a;
        }
        .hero-meta div span {
            font-size: 14px;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 34px;
            }
            .hero-meta {
                gap: 24px;
                flex-wrap: wrap;
            }
        }
        @media (max-width: 480px) {
            .hero {
                padding: 48px 0 32px;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
            }
        }

        /* ===== 权威认证 / 信任条 ===== */
        .trust-bar {
            padding: 32px 0;
            background: #ffffff;
            border-bottom: 1px solid #f1f5f9;
            text-align: center;
        }
        .trust-bar p {
            font-size: 14px;
            font-weight: 600;
            color: #94a3b8;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }
        .trust-logos {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px 32px;
        }
        .trust-logos span {
            font-size: 14px;
            font-weight: 600;
            color: #065f46;
            background: #ecfdf5;
            padding: 6px 20px;
            border-radius: 20px;
            border: 1px solid #a7f3d0;
        }
        .trust-logos span.highlight-badge {
            background: #d1fae5;
            border-color: #34d399;
            color: #064e3b;
        }

        /* ===== 产品中心 ===== */
        .products {
            padding: 72px 0;
            background: #fafaf9;
        }
        .section-label {
            font-size: 14px;
            font-weight: 600;
            color: #d97706;
            letter-spacing: 2px;
            text-transform: uppercase;
            text-align: center;
            margin-bottom: 6px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            color: #0f172a;
        }
        .section-desc {
            text-align: center;
            color: #64748b;
            font-size: 17px;
            max-width: 560px;
            margin: 0 auto 44px;
        }
        .product-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .product-card {
            background: #ffffff;
            border-radius: 12px;
            padding: 24px 16px;
            text-align: center;
            border: 1px solid #f1f5f9;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .product-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.06);
        }
        .product-card .product-img {
            width: 100%;
            height: 120px;
            background: #f8fafc;
            border-radius: 8px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: #94a3b8;
            border: 1px solid #f1f5f9;
            overflow: hidden;
        }
        .product-card .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .product-card h3 {
            font-size: 17px;
            margin-bottom: 4px;
            color: #0f172a;
        }
        .product-card .model {
            display: inline-block;
            margin-top: 6px;
            font-size: 12px;
            color: #d97706;
            font-weight: 600;
            background: #fef3c7;
            padding: 2px 16px;
            border-radius: 20px;
        }

        @media (max-width: 900px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .product-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 26px;
            }
        }

        /* ===== 工厂实力 ===== */
        .advantages {
            padding: 72px 0;
            background: #ffffff;
        }
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .adv-item {
            text-align: center;
            padding: 20px 12px;
        }
        .adv-item .num {
            font-size: 36px;
            font-weight: 800;
            color: #d97706;
            display: block;
        }
        .adv-item h4 {
            font-size: 18px;
            margin: 8px 0 4px;
        }
        .adv-item p {
            font-size: 14px;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .adv-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .adv-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== OEM 定制流程 ===== */
        .oem {
            padding: 72px 0;
            background: #fafaf9;
            border-top: 1px solid #f3f4f6;
            border-bottom: 1px solid #f3f4f6;
        }
        .oem-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 32px;
        }
        .step {
            text-align: center;
            background: #fff;
            padding: 28px 16px;
            border-radius: 12px;
            border: 1px solid #f1f5f9;
        }
        .step .step-num {
            display: inline-block;
            background: #d97706;
            color: #fff;
            width: 36px;
            height: 36px;
            line-height: 36px;
            border-radius: 50%;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .step h4 {
            font-size: 18px;
            margin-bottom: 4px;
        }
        .step p {
            font-size: 14px;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .oem-steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .oem-steps {
                grid-template-columns: 1fr;
            }
        }