:root {
            --navy: #1c4587;
            --navy-dk: #123163;
            --green: #3d7a1f;
            --green-lt: #e8f2e0;
            --grey: #f0f0f0;
            --line: #c0c0c0;
            --link: #1155cc;
            --red: #a01919;
            --amber: #b45309;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background-color: #e8ecf1;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            line-height: 1.5;
            color: #222;
            -webkit-text-size-adjust: 100%;
        }
        a {
            color: var(--link);
            text-decoration: none;
        }
        a:hover {
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--navy);
            outline-offset: 2px;
        }
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--navy);
            outline-offset: 2px;
        }
        .container {
            max-width: 1100px;
            margin: 0 auto;
            background: #fff;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        /* Header */
        .header {
            background: var(--navy);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 16px;
            flex-wrap: wrap;
        }
        .logo {
            font-size: 22px;
            font-weight: bold;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .logo span {
            color: #8fc34d;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .nav-links a {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover {
            border-bottom-color: #8fc34d;
            text-decoration: none;
        }
        .nav-links .btn-primary {
            background: #fff;
            color: var(--navy);
            padding: 8px 14px;
            font-weight: bold;
            border-radius: 0;
            border: none;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
        }
        .nav-links .btn-primary:hover {
            background: #e8ecf1;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: transparent;
            border: none;
            gap: 4px;
            padding: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: #fff;
            display: block;
            border-radius: 2px;
        }
        @media (max-width: 700px) {
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                background: var(--navy-dk);
                padding: 12px 0;
                margin-top: 8px;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            .header {
                flex-wrap: wrap;
            }
            .nav-links a {
                padding: 8px 16px;
                width: 100%;
                border-bottom: none;
            }
            .nav-links .btn-primary {
                margin: 0 16px;
                width: auto;
            }
        }
        /* Breadcrumb */
        .breadcrumb {
            padding: 10px 20px;
            font-size: 13px;
            color: #555;
            background: #fafafa;
            border-bottom: 1px solid var(--line);
        }
        .breadcrumb a {
            color: var(--link);
        }
        /* Main */
        .main {
            flex: 1;
            padding: 20px;
        }
        .hero {
            text-align: center;
            margin-bottom: 32px;
        }
        h1 {
            font-size: 28px;
            color: var(--navy);
            margin-bottom: 8px;
            line-height: 1.2;
        }
        .hero p {
            font-size: 16px;
            color: #333;
            margin-bottom: 16px;
        }
        .hero .trust {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #555;
            margin: 12px 0 20px;
        }
        .btn {
            display: inline-block;
            font-weight: bold;
            padding: 12px 24px;
            font-size: 16px;
            text-align: center;
            border: none;
            cursor: pointer;
            border-radius: 0;
            text-decoration: none;
            line-height: 1.2;
            transition: background 0.2s;
        }
        .btn-primary {
            background: var(--navy);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--navy-dk);
            text-decoration: none;
        }
        .btn-success {
            background: var(--green);
            color: #fff;
        }
        .btn-success:hover {
            background: #2e5e17;
            text-decoration: none;
        }
        .btn-secondary {
            background: var(--grey);
            color: #222;
            border: 1px solid var(--line);
        }
        .btn-secondary:hover {
            background: #e0e0e0;
            text-decoration: none;
        }
        .section {
            margin: 32px 0;
        }
        h2 {
            font-size: 22px;
            color: var(--navy);
            margin-bottom: 12px;
            font-weight: bold;
        }
        h3 {
            font-size: 18px;
            color: var(--navy);
            margin-bottom: 8px;
        }
        .intro-text {
            font-size: 15px;
            max-width: 800px;
        }
        .steps {
            margin: 16px 0 24px;
            padding-left: 20px;
        }
        .steps li {
            margin-bottom: 12px;
            font-size: 15px;
        }
        .spec-table {
            width: 100%;
            border-collapse: collapse;
            margin: 16px 0;
            background: #fcfcfc;
            border: 1px solid var(--line);
        }
        .spec-table th,
        .spec-table td {
            padding: 10px 14px;
            border: 1px solid var(--line);
            text-align: left;
            font-size: 14px;
        }
        .spec-table th {
            background: #f0f0f0;
            color: var(--navy);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 20px 0;
        }
        .feature-card {
            background: #fafafa;
            border: 1px solid var(--line);
            padding: 16px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            border-radius: 0;
        }
        .feature-card svg {
            flex-shrink: 0;
            margin-top: 2px;
        }
        .feature-card h4 {
            font-size: 16px;
            margin-bottom: 4px;
            color: var(--navy);
        }
        .problem-list {
            list-style-type: disc;
            padding-left: 24px;
            margin: 12px 0;
        }
        .problem-list li {
            margin-bottom: 8px;
            font-size: 14px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 12px;
            margin: 16px 0;
        }
        .related-grid a {
            display: block;
            padding: 8px 12px;
            background: #f9f9f9;
            border: 1px solid var(--line);
            color: var(--navy);
            font-weight: 600;
            text-decoration: none;
        }
        .related-grid a:hover {
            background: #e8ecf1;
            text-decoration: none;
        }
        details {
            margin-bottom: 14px;
            background: #fafafa;
            border: 1px solid var(--line);
            padding: 10px 14px;
        }
        details[open] {
            background: #fff;
        }
        summary {
            font-weight: bold;
            cursor: pointer;
            font-size: 15px;
            color: var(--navy);
            list-style: none;
        }
        summary::-webkit-details-marker {
            display: none;
        }
        summary:focus-visible {
            outline: 2px solid var(--navy);
            outline-offset: 2px;
        }
        .cta-band {
            text-align: center;
            background: #f0f4fa;
            padding: 28px 20px;
            margin: 32px 0 16px;
            border: 1px solid var(--line);
        }
        .cta-band h2 {
            margin-bottom: 12px;
        }
        footer {
            background: #f0f0f0;
            color: #333;
            padding: 20px;
            font-size: 13px;
            border-top: 1px solid var(--line);
            margin-top: auto;
        }
        footer a {
            color: var(--navy);
            font-weight: 600;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            margin: 12px 0 16px;
        }
        .footer-disclaimer {
            margin-top: 12px;
            color: #555;
            font-size: 12px;
        }
        /* Sticky mobile CTA */
        .sticky-mobile-cta {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: #fff;
            padding: 8px 16px;
            box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
            z-index: 99;
            text-align: center;
            border-top: 1px solid var(--line);
        }
        .sticky-mobile-cta .btn {
            width: 100%;
            padding: 14px;
            font-size: 16px;
        }
        @media (max-width: 700px) {
            .sticky-mobile-cta {
                display: block;
            }
            body {
                padding-bottom: 70px;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 24px;
            }
            .hero .trust {
                flex-direction: column;
                gap: 8px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }