:root {
            --bg: #eef3f8;
            --card: #ffffff;
            --text: #1f2937;
            --muted: #5b6472;
            --accent: #0f766e;
            --accent-hover: #0b5d57;
            --border: #d7e0ea;
            --shadow: 0 14px 40px rgba(31, 41, 55, 0.12);
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: "Segoe UI", Arial, sans-serif;
            background:
                radial-gradient(circle at top left, #d7f0eb 0, transparent 35%),
                radial-gradient(circle at bottom right, #dbeafe 0, transparent 30%),
                var(--bg);
            color: var(--text);
        }

        .page {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 32px 20px;
        }

        .card {
            width: 100%;
            max-width: 920px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 24px;
            box-shadow: var(--shadow);
            padding: 36px;
        }

        .eyebrow {
            display: inline-block;
            margin-bottom: 12px;
            padding: 6px 12px;
            border-radius: 999px;
            background: #e6fffb;
            color: var(--accent);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        h1 {
            margin: 0 0 10px;
            font-size: 34px;
            line-height: 1.15;
        }

        .lead {
            margin: 0 0 28px;
            color: var(--muted);
            font-size: 17px;
            line-height: 1.6;
        }

        .section-title {
            margin: 0 0 18px;
            font-size: 22px;
        }

        .links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 14px;
        }

        .links li a {
            display: block;
            padding: 18px 20px;
            border: 1px solid var(--border);
            border-radius: 16px;
            background: #fbfdff;
            color: var(--text);
            text-decoration: none;
            transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
        }

        .links li a:hover {
            transform: translateY(-2px);
            border-color: #9fd6cf;
            box-shadow: 0 10px 24px rgba(15, 118, 110, 0.12);
        }

        .link-title {
            display: block;
            margin-bottom: 6px;
            color: var(--accent);
            font-size: 18px;
            font-weight: 700;
        }

        .link-text {
            display: block;
            color: var(--muted);
            line-height: 1.5;
        }

        @media (max-width: 640px) {
            .card {
                padding: 24px;
                border-radius: 18px;
            }

            h1 {
                font-size: 28px;
            }

            .lead {
                font-size: 16px;
            }

            .links li a {
                padding: 16px;
            }
        }

.section-block {
    margin-bottom: 20px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: #ffffff;
    overflow: hidden;
}

.section-summary {
    padding: 18px 20px;
    cursor: pointer;
    font-size: 22px;
    font-weight: 700;
    list-style: none;
    color: var(--text);
    background: #f8fbfd;
}

.section-summary::-webkit-details-marker {
    display: none;
}

.section-summary::after {
    content: "+";
    float: right;
    color: var(--accent);
    font-size: 24px;
    line-height: 1;
}

.section-block[open] .section-summary::after {
    content: "−";
}

.section-block .links {
    padding: 0 16px 16px;
    margin: 0;
}