.header_ptn_1 {
    background: var(--color-cream);
    border-bottom: 1px solid var(--color-line);
    .wrap {
        margin: 0 auto;
        padding: 20px 40px;
        max-width: 1280px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        @media (max-width: 600px) {
            padding: 16px 24px;
            align-items: flex-start;
        }
        @media (max-width: 370px) {
            padding: 16px;
        }
    }
    .name {
        color: var(--color-ink);
        font-family: var(--font-serif);
        font-size: 18px;
        font-weight: 600;
        line-height: 1.5em;
        letter-spacing: 0.06em;
        @media (max-width: 600px) {
            padding: 8px 0;
            font-size: 16px;
        }
    }
    .nav {
        @media (max-width: 600px) {
            display: none;
        }
        .list {
            display: flex;
            gap: 40px;
            @media (max-width: 800px) {
                gap: 28px;
            }
        }
        a {
            padding: 8px 0;
            display: inline-block;
            background: linear-gradient(currentColor, currentColor) right bottom / 0 1px no-repeat;
            color: var(--color-ink);
            font-size: 14px;
            font-weight: 500;
            line-height: 1.6em;
            letter-spacing: 0.1em;
            transition: background-size 0.3s, color 0.3s;
            @media (hover: hover) {
                &:hover {
                    background-position: left bottom;
                    background-size: 100% 1px;
                    color: var(--color-accent);
                }
            }
        }
    }
    .toggle {
        display: none;
        @media (max-width: 600px) {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
        }
        summary {
            padding: 0 16px;
            min-height: 40px;
            display: flex;
            align-items: center;
            color: var(--color-ink);
            font-size: 14px;
            font-weight: 500;
            line-height: 1.5em;
            letter-spacing: 0.1em;
            border: 1px solid var(--color-ink);
            list-style: none;
            cursor: pointer;
            &::-webkit-details-marker {
                display: none;
            }
        }
        &[open] summary {
            background: var(--color-ink);
            color: var(--color-cream);
        }
        .list {
            margin-top: 8px;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
        }
        a {
            padding: 10px 0;
            min-height: 44px;
            display: block;
            color: var(--color-ink);
            font-size: 16px;
            font-weight: 500;
            line-height: 1.5em;
            letter-spacing: 0.08em;
        }
    }
}

/* 最終更新: 2026-10-25 19:15 */