:root {
            --primary-color: #003366;
            --accent-color: #e67e23;
            --bg-light: #f4f7f6;
            --border-color: #e0e0e0;
            --text-dark: #333333;
            --text-light: #555555;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-dark);
            background: var(--bg-light);
        }

        .container {
            max-width: 1150px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Banner */
        .header-banner {
            background: linear-gradient(135deg, var(--primary-color) 0%, #004080 100%);
            color: white;
            padding: 55px 45px;
            margin: 30px 0;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 51, 102, 0.2);
            position: relative;
            overflow: hidden;
        }

        .header-banner::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
        }

        .header-banner h1 {
            font-size: 2.5em;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
            position: relative;
            z-index: 1;
        }

        .header-banner .subtitle {
            font-size: 1.1em;
            line-height: 1.8;
            opacity: 0.95;
            max-width: 900px;
            position: relative;
            z-index: 1;
        }

        /* Definition Box */
        .definition-box {
            background: white;
            padding: 35px 40px;
            margin-bottom: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            border-left: 6px solid var(--primary-color);
        }

        .definition-box p {
            color: var(--text-dark);
            font-size: 1.05em;
            font-weight: 500;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Image Showcase */
        .image-showcase {
            background: white;
            padding: 40px;
            margin-bottom: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            text-align: center;
        }

        .image-showcase .image-wrapper {
            background: var(--bg-light);
            padding: 30px;
            border-radius: 10px;
            border: 3px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .image-showcase .image-wrapper:hover {
            border-color: var(--accent-color);
            box-shadow: 0 8px 25px rgba(230, 126, 35, 0.2);
            transform: scale(1.02);
        }

        .image-showcase img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
        }

        /* Features Section */
        .features-section {
            background: white;
            padding: 45px 40px;
            margin-bottom: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
        }

        .features-section h2 {
            color: var(--primary-color);
            font-size: 1.6em;
            font-weight: 700;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 4px solid var(--accent-color);
            display: inline-block;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }

        .feature-card {
            background: var(--bg-light);
            padding: 30px;
            border-radius: 10px;
            border: 2px solid var(--border-color);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 6px;
            height: 100%;
            background: var(--accent-color);
            transform: scaleY(0);
            transition: transform 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 51, 102, 0.15);
            border-color: var(--accent-color);
        }

        .feature-card:hover::before {
            transform: scaleY(1);
        }

        .feature-card h3 {
            color: var(--primary-color);
            font-size: 1.2em;
            font-weight: 700;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .feature-card h3::before {
            content: "▶";
            color: var(--accent-color);
            margin-right: 12px;
            font-size: 0.8em;
        }

        .feature-card p {
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Info Highlight Strip */
        .info-strip {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 25px;
        }

        .info-item {
            background: linear-gradient(135deg, #fff5e6 0%, #ffe8cc 100%);
            padding: 25px;
            border-radius: 10px;
            text-align: center;
            border: 2px solid var(--accent-color);
            transition: all 0.3s ease;
        }

        .info-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(230, 126, 35, 0.25);
        }

        .info-item .icon {
            font-size: 2.5em;
            color: var(--accent-color);
            margin-bottom: 12px;
        }

        .info-item h4 {
            color: var(--primary-color);
            font-size: 1.1em;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .info-item p {
            color: var(--text-light);
            font-size: 0.95em;
            margin-bottom: 0;
        }

        /* Safety Footer */
        .safety-footer {
            background: white;
            padding: 40px;
            margin-bottom: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            border-top: 5px solid var(--accent-color);
        }

        .safety-footer h3 {
            color: var(--primary-color);
            font-size: 1.4em;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
        }

        .safety-footer h3::before {
            content: "⚠";
            color: var(--accent-color);
            font-size: 1.3em;
            margin-right: 12px;
        }

        .safety-footer p {
            color: var(--text-light);
            line-height: 1.8;
            font-size: 1.05em;
            margin-bottom: 0;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .container {
                padding: 0 15px;
            }

            .header-banner {
                padding: 40px 28px;
                margin: 20px 0;
            }

            .header-banner h1 {
                font-size: 1.9em;
            }

            .header-banner .subtitle {
                font-size: 1em;
            }

            .features-section,
            .image-showcase,
            .safety-footer {
                padding: 30px 25px;
            }

            .features-section h2 {
                font-size: 1.4em;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .info-strip {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            body {
                font-size: 15px;
            }

            .header-banner {
                padding: 30px 20px;
            }

            .header-banner h1 {
                font-size: 1.7em;
            }

            .definition-box,
            .features-section,
            .image-showcase,
            .safety-footer {
                padding: 25px 20px;
            }

            .feature-card {
                padding: 25px;
            }

            .image-showcase .image-wrapper {
                padding: 20px;
            }
        }