:root {
            --bg: #f7f7fb;
            --card-bg: #ffffff;
            --accent: #2f6fe0;
            --accent-soft: #e3edff;
            --text-main: #222222;
            --text-muted: #666666;
            --border-soft: #e0e0ea;
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.06);
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: var(--bg);
            color: var(--text-main);
        }

        .page {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        header {
            padding: 1.5rem 1.5rem 0.5rem;
        }

        .logo-row {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #2f6fe0, #6ea8ff);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 6px 16px rgba(47, 111, 224, 0.35);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
        }

        .logo-text-title {
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .logo-text-sub {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .back-row {
            padding: 0.5rem 1.5rem 0;
        }

        .back-button {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.4rem 0.8rem;
            border-radius: 999px;
            border: 1px solid var(--border-soft);
            background: #ffffff;
            color: var(--text-muted);
            font-size: 0.85rem;
            text-decoration: none;
            cursor: pointer;
            transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
        }

        .back-button:hover {
            background: var(--accent-soft);
            border-color: var(--accent);
            color: var(--accent);
        }

        .back-icon {
            font-size: 0.9rem;
        }

        main {
            flex: 1;
            padding: 1.5rem;
            display: flex;
            justify-content: center;
        }

        .card {
            width: 100%;
            max-width: 820px;
            background: var(--card-bg);
            border-radius: 18px;
            box-shadow: var(--shadow-soft);
            padding: 1.75rem 1.75rem 1.5rem;
            border: 1px solid var(--border-soft);
        }

        .card-header {
            margin-bottom: 1.25rem;
        }

        .card-title {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 0 0 0.25rem;
        }

        .card-subtitle {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .section {
            margin-bottom: 1.25rem;
        }

        .section:last-of-type {
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.35rem;
        }

        .section-text {
            font-size: 0.95rem;
            line-height: 1.5;
            color: var(--text-main);
        }

        .section-list {
            margin: 0.35rem 0 0.35rem 1.1rem;
            padding: 0;
            font-size: 0.95rem;
            color: var(--text-main);
        }

        .section-list li {
            margin-bottom: 0.15rem;
        }

        .muted {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        footer {
            padding: 1rem 1.5rem 1.25rem;
            border-top: 1px solid var(--border-soft);
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(6px);
        }

        .footer-inner {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-links {
            display: flex;
            gap: 0.75rem;
        }

        .footer-link {
            color: var(--accent);
            text-decoration: none;
        }

        .footer-link:hover {
            text-decoration: underline;
        }

        @media (max-width: 640px) {
            header {
                padding: 1.25rem 1rem 0.5rem;
            }
            .back-row {
                padding: 0.5rem 1rem 0;
            }
            main {
                padding: 1rem;
            }
            .card {
                padding: 1.4rem 1.3rem 1.2rem;
                border-radius: 14px;
            }
            footer {
                padding: 0.9rem 1rem 1rem;
            }
            .footer-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }