/* ABOUT 안에서만 적용되는 스타일 */
.about-page {
    --about-space: clamp(72px, 9vw, 132px);
}

.about-page section {
    scroll-margin-top: 24px;
}

.about-meta {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    font-size: 10px;
    line-height: 1.6;
    letter-spacing: 0.13em;
}

.about-meta>span:last-child {
    color: var(--color-muted);
    text-align: right;
}

.about-eyebrow {
    margin-bottom: 24px;
    font-size: 10px;
    letter-spacing: 0.14em;
}

.about-heading {
    font-size: clamp(30px, 3.5vw, 52px);
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.055em;
}

.about-copy {
    max-width: 470px;
    color: var(--color-muted);
    font-size: 15px;
    line-height: 1.95;
}

.about-section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 48px;
    margin-block: 72px 64px;
}

/* 첫 번째 화면 */
.about-intro {
    padding-block: 40px var(--about-space);
}

.about-intro__title {
    margin-top: clamp(64px, 9vw, 132px);
    font-size: clamp(44px, 8.2vw, 120px);
    font-weight: 800;
    line-height: 1.02;
    letter-spacing: -0.065em;
}

.about-intro__title>span {
    color: #92928a;
}

.about-intro__bottom {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    margin-top: 72px;
    padding-top: 32px;
    border-top: 1px solid var(--color-line);
}

.about-intro__bottom>p {
    font-size: clamp(22px, 2.5vw, 34px);
    line-height: 1.45;
    letter-spacing: -0.04em;
}

/* 모든 섹션 이동 링크에 동일한 글꼴 크기와 여백을 적용합니다. */
.about-page .text-link {
    margin-top: 30px;
    font-size: 10px;
    letter-spacing: 0.12em;
}

/* 브랜드 철학 */
.about-philosophy {
    padding-block: 36px var(--about-space);
    /* 공통 종이 질감이 섹션 사이에서 끊기지 않도록 배경을 투명하게 유지합니다. */
    background: transparent;
}

.about-philosophy__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 80px;
    margin-top: 80px;
}

.about-philosophy .about-copy {
    margin-top: 28px;
}

.about-key-art {
    display: grid;
    justify-items: center;
    align-content: center;
    min-height: 340px;
    padding: 40px 24px;
}

.about-key {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(100%, 330px);
    height: 166px;
    padding: 32px;
    border: 1px solid #fffefa;
    border-bottom: 14px solid #c4c3bb;
    border-radius: 18px;
    background: linear-gradient(145deg, #fffefa, #e2e1d9);
    box-shadow:
        0 30px 28px -20px rgb(30 30 25 / 30%),
        inset 0 0 0 6px rgb(255 255 255 / 30%);
    transform: rotate(-9deg);
    font-size: 38px;
}

.about-key>span:first-child {
    font-family: Arial, sans-serif;
    font-size: 56px;
}

.about-key-art>p {
    margin-top: 52px;
    color: var(--color-muted);
    font-size: 9px;
    text-align: center;
    letter-spacing: 0.12em;
}

/* 서비스 */
.about-services,
.about-approach {
    padding-block: 36px var(--about-space);
}

.about-services {
    padding-top: 48px;
}

.about-service {
    border-top: 1px solid var(--color-line);
}

.about-service:last-child {
    border-bottom: 1px solid var(--color-line);
}

.about-service>summary {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr) 32px;
    align-items: center;
    gap: 20px;
    padding-block: 32px;
    cursor: pointer;
    list-style: none;
}

.about-service>summary::-webkit-details-marker {
    display: none;
}

.about-service>summary:focus-visible {
    outline-offset: -2px;
}

.about-service__number {
    align-self: start;
    padding-top: 8px;
    color: var(--color-muted);
    font-size: 11px;
}

.about-service__name {
    display: grid;
    gap: 10px;
}

.about-service__name>span:first-child {
    font-size: clamp(24px, 3vw, 40px);
    line-height: 1.2;
    letter-spacing: -0.035em;
}

.about-service__name>span:last-child {
    color: var(--color-muted);
    font-size: 13px;
    line-height: 1.7;
}

.about-service__icon {
    position: relative;
    width: 24px;
    height: 24px;
}

.about-service__icon::before,
.about-service__icon::after {
    position: absolute;
    top: 11px;
    left: 3px;
    width: 18px;
    height: 1px;
    background: currentColor;
    content: "";
}

.about-service__icon::after {
    transform: rotate(90deg);
    transition: transform 180ms ease;
}

.about-service[open] .about-service__icon::after {
    transform: rotate(0);
}

.about-service__body {
    padding: 0 52px 36px 84px;
}

.about-service__body>p {
    max-width: 640px;
    color: var(--color-muted);
    font-size: 14px;
    line-height: 1.95;
}

.about-service__body ul {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
}

.about-service__body li {
    padding: 7px 12px;
    border: 1px solid var(--color-line);
    border-radius: 4px;
    font-size: 10px;
}

/* 협업 방식 */
.about-approach {
    border-top: 1px solid var(--color-line);
}

.about-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 40px;
}

.about-step {
    padding-top: 24px;
    border-top: 1px solid var(--color-text);
}

.about-step__number {
    color: var(--color-muted);
    font-size: 10px;
    letter-spacing: 0.12em;
}

.about-step h3 {
    margin-top: 40px;
    font-size: 23px;
    letter-spacing: -0.04em;
}

.about-step p {
    max-width: 320px;
    margin-top: 20px;
    color: var(--color-muted);
    font-size: 14px;
    line-height: 1.95;
}

/* 문의 영역 */
.about-contact {
    padding-block: 80px;
    /* 공통 종이 질감이 섹션 사이에서 끊기지 않도록 배경을 투명하게 유지합니다. */
    background: transparent;
}

.about-contact__inner {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 48px;
}

.about-contact__link {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    min-height: 52px;
    padding-block: 12px;
    border-bottom: 1px solid currentColor;
    font-size: 15px;
}

.about-contact__link>span {
    font-size: 24px;
    transition: transform 180ms ease;
}

.about-contact__link:hover>span {
    transform: translate(3px, -3px);
}

.about-page+.site-footer {
    margin-top: 0;
}

/* 모바일 */
@media (max-width: 760px) {
    .about-intro {
        padding-top: 28px;
    }

    .about-meta {
        font-size: 9px;
    }

    .about-intro__title {
        font-size: clamp(36px, 8.5vw, 64px);
    }

    .about-intro__bottom,
    .about-philosophy__grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .about-intro__bottom {
        margin-top: 48px;
    }

    .about-copy {
        font-size: 14px;
    }

    .about-philosophy__grid {
        margin-top: 32px;
    }

    .about-key-art {
        min-height: 280px;
    }

    .about-key {
        width: 260px;
        max-width: 100%;
        height: 140px;
        padding: 24px;
        font-size: 30px;
    }

    .about-key>span:first-child {
        font-size: 44px;
    }

    .about-section-heading,
    .about-contact__inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 28px;
    }

    .about-section-heading {
        margin-block: 48px 40px;
    }

    .about-service>summary {
        grid-template-columns: 24px minmax(0, 1fr) 24px;
        gap: 12px;
        padding-block: 26px;
    }

    .about-service__number {
        padding-top: 5px;
    }

    .about-service__name>span:first-child {
        font-size: clamp(20px, 5.5vw, 28px);
    }

    .about-service__name>span:last-child {
        font-size: 12px;
    }

    .about-service__body {
        padding: 0 0 28px 36px;
    }

    .about-steps {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .about-step h3 {
        margin-top: 24px;
    }

    .about-step p {
        max-width: none;
    }

    .about-contact {
        padding-block: 64px;
    }

    .about-contact__link {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {

    .about-service__icon::after,
    .about-contact__link>span {
        transition: none;
    }
}

/* ABOUT 가독성 보정: 본문 크기와 명도 대비 개선 */
.about-page .about-copy,
.about-page .about-service__body>p,
.about-page .about-step p {
    color: var(--color-muted);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.85;
    letter-spacing: 0;
}

/* 제목 일부가 지나치게 흐리게 보이지 않도록 조정 */
.about-page .about-intro__title>span {
    color: #62625c;
}

/* 작은 영문 안내 문구 확대 및 과한 자간 완화 */
.about-page .about-meta,
.about-page .about-eyebrow,
.about-page .about-step__number,
.about-page .about-key-art>p,
.about-page .text-link {
    font-size: 12px;
    letter-spacing: 0.08em;
}

/* 서비스 설명 및 태그도 모바일에서 읽기 쉬운 크기로 통일 */
.about-page .about-service__name>span:last-child {
    font-size: 14px;
}

.about-page .about-service__body li,
.about-page .about-service__number {
    font-size: 12px;
}

/* 한글 제목의 지나치게 좁은 자간 완화 */
.about-page .about-heading,
.about-page .about-step h3 {
    letter-spacing: -0.035em;
}

/* 서비스 제목과 설명을 위아래로 배치 */
.about-services .about-section-heading {
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

/* 제목 아래 설명은 작은 크기로 표시 */
.about-services .about-section-heading > .about-copy {
  font-size: 14px;
  line-height: 1.8;
}

/* TOP 링크를 본문과 같은 좌우 기준선에 맞추고 하단 여백을 확보합니다. */
.about-top-link {
    padding-bottom: 32px;
}

/* HOW WE WORK를 오른쪽 본문 시작선에 맞춥니다.
   브랜드 철학 영역의 2열 배치와 간격 80px을 기준으로 합니다. */
.about-services > .container > .text-link {
    margin-left: calc(50% + 40px);
}

/* TOP은 문서 흐름에서 분리해 화면 오른쪽 위에 고정합니다. */
.about-page .about-top-link {
    position: fixed;
    top: 110px;
    right: var(--page-gutter);
    z-index: 15;

    width: auto;
    max-width: none;
    margin: 0;
    padding: 0;
}

/* 배경 위에서도 읽기 쉽도록 작은 버튼 형태로 표시합니다. */
.about-page .about-top-link > .text-link {
    min-height: 44px;
    margin: 0;
    padding: 10px 14px;
    gap: 8px;

    border: 1px solid var(--color-line);
    border-radius: 4px;
    background: rgb(255 255 255 / 95%);
    color: var(--color-text);
    font-size: 12px;
    letter-spacing: 0.08em;
}

/* 모바일에서는 본문 링크를 왼쪽에 맞추고,
   TOP은 헤더 바로 아래에 고정합니다. */
@media (max-width: 760px) {
    .about-services > .container > .text-link {
        margin-left: 0;
    }

    .about-page .about-top-link {
        top: 84px;
        right: 16px;
    }
}

/* TOP: 평소에는 숨기고, 스크롤 후 오른쪽 아래에 표시 */
.about-page .about-top-link {
    position: fixed;
    top: auto;
    right: clamp(20px, 3vw, 48px);
    bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    z-index: 15;

    width: auto;
    max-width: none;
    margin: 0;
    padding: 0;

    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(10px);

    transition:
        opacity 220ms ease,
        transform 220ms ease,
        visibility 220ms;
}

.about-page .about-top-link.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

/* 작고 차분한 원형 버튼 */
.about-page .about-top-link > .text-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;

    width: 56px;
    height: 56px;
    min-height: 56px;
    margin: 0;
    padding: 0;

    border: 1px solid rgb(37 37 37 / 15%);
    border-radius: 50%;
    background: rgb(255 255 255 / 94%);
    color: #252525;
    box-shadow: 0 3px 14px rgb(0 0 0 / 6%);

    font-size: 9px;
    line-height: 1.2;
    letter-spacing: 0.08em;

    transition:
        background-color 180ms ease,
        box-shadow 180ms ease;
}

/* 컬러 이모지는 숨기고 단색 화살표로 교체 */
.about-page .about-top-link > .text-link > span {
    display: none;
}

.about-page .about-top-link > .text-link::before {
    content: "↑";
    font-family: Arial, sans-serif;
    font-size: 20px;
    line-height: 1;
}

@media (hover: hover) {
    .about-page .about-top-link > .text-link:hover {
        background: #fff;
        box-shadow: 0 5px 18px rgb(0 0 0 / 10%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .about-page .about-top-link,
    .about-page .about-top-link > .text-link {
        transition: none;
    }

    .about-page .about-top-link {
        transform: none;
    }
}

/* TOP 버튼을 모서리에서 안쪽으로 이동 */
.about-page .about-top-link {
    right: clamp(32px, 5vw, 80px);
    bottom: calc(64px + env(safe-area-inset-bottom, 0px));
}

/* 크기와 대비를 높여 눈에 잘 띄도록 조정 */
.about-page .about-top-link > .text-link {
    width: 64px;
    height: 64px;
    min-height: 64px;

    background: #fff;
    border-color: rgb(37 37 37 / 28%);
    box-shadow: 0 4px 18px rgb(0 0 0 / 12%);
    font-size: 11px;
}

.about-page .about-top-link > .text-link::before {
    font-size: 24px;
}

/* 모바일에서는 본문을 과하게 가리지 않도록 간격 조정 */
@media (max-width: 760px) {
    .about-page .about-top-link {
        right: 24px;
        bottom: calc(40px + env(safe-area-inset-bottom, 0px));
    }
}
/* 투명 Shift 키: 원본 각도를 유지하고 크기를 제한합니다. */
.about-key.about-key--photo {
    transform: none;
    width: min(100%, 300px);
    padding: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: url("../image/shiftkey-transparent.png") center / contain no-repeat;
}

@media (max-width: 760px) {
    .about-key.about-key--photo {
        width: min(100%, 240px);
    }
}

/* 수정된 서비스 설명 */
.about-services .about-section-heading > .about-copy {
    max-width: 960px;
}

.about-page .about-service__name > span:last-child {
    max-width: 760px;
    line-height: 1.8;
    word-break: keep-all;
    overflow-wrap: anywhere;
}

.about-service__body > ul:first-child {
    margin-top: 0;
}

/* 작업 프로세스: 01–04 / 05–08 / 09–11 / 12–14 */
.about-process .about-section-heading {
    margin-block: 48px 40px;
}

.about-process__list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(4, auto);
    grid-auto-flow: column;
    align-items: stretch;
    gap: 14px 20px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.about-process__item:nth-child(12) { grid-area: 1 / 4; }
.about-process__item:nth-child(13) { grid-area: 2 / 4; }
.about-process__item:nth-child(14) { grid-area: 3 / 4; }

.about-process__item {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    align-items: start;
    gap: 12px;
    min-width: 0;
    padding: 20px 16px;
    color: #252525;
    background: linear-gradient(145deg, #f5f5f2, #deded9);
    border: 1px solid #c4c3bb;
}

.about-process__number {
    padding-top: 2px;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.5;
    font-variant-numeric: tabular-nums;
}

.about-process__item h3 {
    margin: 0;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.5;
    word-break: keep-all;
    overflow-wrap: anywhere;
}

.about-process__item p {
    margin: 4px 0 0;
    font-size: 13px;
    line-height: 1.6;
    word-break: keep-all;
    overflow-wrap: anywhere;
}

@media (max-width: 1100px) {
    .about-process__list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        grid-template-rows: none;
        grid-auto-flow: row;
    }

    .about-process__list > .about-process__item {
        grid-area: auto;
    }
}

@media (max-width: 600px) {
    .about-process__list {
        grid-template-columns: minmax(0, 1fr);
        gap: 10px;
    }

    .about-process__item {
        padding: 18px;
    }
}