/* ==========================================================
   サイトについてページ専用ダークテーマ
   body.dark-top.dt-about 配下のみに適用
   ========================================================== */

/* ---------- ヒーロー ---------- */
.dt-about .dta-hero {
    position: relative;
    background:
        linear-gradient(90deg, rgba(10, 9, 11, .88) 0%, rgba(10, 9, 11, .58) 55%, rgba(10, 9, 11, .22) 100%),
        url(/img/design/footer_torii.jpg) center 38% / cover no-repeat;
    border-bottom: 1px solid #1c1b20;
}

.dt-about .dta-hero__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 66px 16px 44px;
}

.dt-about .dta-hero__label {
    display: block;
    font-size: 13px;
    font-weight: bold;
    letter-spacing: .16em;
    color: #d0161f;
    margin-bottom: 14px;
}

.dt-about .dta-hero__title {
    font-family: "Shippori Mincho", serif;
    font-size: 52px;
    font-weight: 800;
    color: #f2f0ed;
    letter-spacing: .08em;
    text-shadow: 0 2px 14px rgba(0, 0, 0, .9);
}

.dt-about .dta-hero__lead {
    margin-top: 20px;
    font-size: 15px;
    color: #d5d2d8;
    line-height: 1.9;
    text-shadow: 0 1px 6px rgba(0, 0, 0, .9);
}

.dt-about .dta-hero__pan {
    margin-top: 26px;
    font-size: 12px;
    color: #9a969f;
}

.dt-about .dta-hero__pan a {
    color: #d0161f;
}

.dt-about .dta-hero__pan a:hover {
    text-decoration: underline;
}

/* ---------- 共通コンテナ・見出し ---------- */
.dt-about .dta-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 56px 16px 70px;
}

.dt-about .dta-secttl {
    text-align: center;
    margin-bottom: 34px;
}

.dt-about .dta-secttl span {
    font-family: "Shippori Mincho", serif;
    font-size: 28px;
    font-weight: 800;
    color: #f2f0ed;
    letter-spacing: .1em;
    position: relative;
    display: inline-block;
    padding-bottom: 14px;
}

.dt-about .dta-secttl span::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 46px;
    height: 2px;
    background: #d0161f;
}

.dt-about .dta-secttl--left {
    text-align: left;
    margin-top: 54px;
}

.dt-about .dta-secttl--left span::after {
    left: 0;
    transform: none;
}

/* ---------- コンセプト ---------- */
.dt-about .dta-concept {
    margin-bottom: 66px;
}

.dt-about .dta-concept__catch {
    text-align: center;
    font-family: "Shippori Mincho", serif;
    font-size: 30px;
    font-weight: 800;
    color: #d0161f;
    letter-spacing: .12em;
    margin-bottom: 30px;
}

.dt-about .dta-concept__body {
    max-width: 860px;
    margin: 0 auto;
}

.dt-about .dta-concept__body p {
    font-size: 15px;
    line-height: 2.1;
    color: #cdc9d2;
    margin-bottom: 20px;
}

/* ---------- 特徴 ---------- */
.dt-about .dta-features {
    margin-bottom: 66px;
}

.dt-about .dta-feats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.dt-about .dta-feat {
    background: #131217;
    border: 1px solid #24222a;
    border-radius: 6px;
    padding: 30px 24px;
    transition: .25s;
}

.dt-about .dta-feat:hover {
    border-color: #d0161f;
    transform: translateY(-4px);
}

.dt-about .dta-feat__icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(208, 22, 31, .12);
    border: 1px solid rgba(208, 22, 31, .4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #d0161f;
    margin-bottom: 18px;
}

.dt-about .dta-feat__title {
    font-size: 17px;
    font-weight: bold;
    color: #f2f0ed;
    margin-bottom: 12px;
}

.dt-about .dta-feat__desc {
    font-size: 13px;
    line-height: 1.95;
    color: #a8a4b0;
}

/* ---------- ご利用の流れ ---------- */
.dt-about .dta-flow {
    margin-bottom: 20px;
}

.dt-about .dta-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    list-style: none;
    padding: 0;
}

.dt-about .dta-step {
    position: relative;
    background: linear-gradient(180deg, #17161c 0%, #111015 100%);
    border: 1px solid #24222a;
    border-radius: 6px;
    padding: 34px 24px 26px;
}

.dt-about .dta-step__num {
    position: absolute;
    top: -14px;
    left: 24px;
    font-family: "Shippori Mincho", serif;
    font-size: 30px;
    font-weight: 800;
    color: #d0161f;
    letter-spacing: .04em;
    text-shadow: 0 2px 10px rgba(0, 0, 0, .9);
}

.dt-about .dta-step__title {
    font-size: 18px;
    font-weight: bold;
    color: #f2f0ed;
    margin: 12px 0 12px;
}

.dt-about .dta-step__desc {
    font-size: 13px;
    line-height: 1.95;
    color: #a8a4b0;
    margin-bottom: 16px;
}

.dt-about .dta-step__link {
    font-size: 13px;
    color: #d0161f;
    font-weight: bold;
}

.dt-about .dta-step__link:hover {
    text-decoration: underline;
}

/* ---------- レイアウト ---------- */
.dt-about .dta-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}

/* ---------- 主なコンテンツ ---------- */
.dt-about .dta-conts {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.dt-about .dta-conts li {
    background: #131217;
    border: 1px solid #24222a;
    border-radius: 6px;
    padding: 24px 22px;
}

.dt-about .dta-conts h3 {
    font-size: 16px;
    font-weight: bold;
    color: #f2f0ed;
    margin-bottom: 12px;
}

.dt-about .dta-conts p {
    font-size: 13px;
    line-height: 1.95;
    color: #a8a4b0;
    margin-bottom: 14px;
}

.dt-about .dta-conts a {
    font-size: 13px;
    color: #d0161f;
    font-weight: bold;
}

.dt-about .dta-conts a:hover {
    text-decoration: underline;
}

/* ---------- 注意事項 ---------- */
.dt-about .dta-notes {
    background: rgba(208, 22, 31, .06);
    border: 1px solid rgba(208, 22, 31, .28);
    border-radius: 6px;
    padding: 26px 24px;
}

.dt-about .dta-notes p {
    font-size: 13.5px;
    line-height: 1.95;
    color: #cdc9d2;
    padding-left: 26px;
    text-indent: -26px;
    margin-bottom: 14px;
}

.dt-about .dta-notes p:last-child {
    margin-bottom: 0;
}

.dt-about .dta-notes i {
    margin-right: 10px;
}

/* ---------- サイドバー ---------- */
/* base.css の aside{float:right;width:30%} を打ち消す */
.dt-about .dta-side {
    float: none;
    width: auto;
}

.dt-about .dta-box {
    background: #131217;
    border: 1px solid #24222a;
    border-radius: 6px;
    padding: 24px 22px;
    margin-bottom: 20px;
}

.dt-about .dta-box__ttl {
    font-size: 16px;
    font-weight: bold;
    color: #f2f0ed;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #24222a;
}

.dt-about .dta-box__lead {
    font-size: 13px;
    line-height: 1.9;
    color: #a8a4b0;
    margin-bottom: 16px;
}

.dt-about .dta-box--help {
    background: linear-gradient(180deg, rgba(208, 22, 31, .14) 0%, #131217 100%);
    border-color: rgba(208, 22, 31, .36);
}

.dt-about .dta-box__btn {
    display: block;
    text-align: center;
    background: #d0161f;
    color: #fff;
    font-size: 14px;
    font-weight: bold;
    padding: 13px 10px;
    border-radius: 4px;
    transition: .2s;
}

.dt-about .dta-box__btn:hover {
    background: #b2121a;
}

.dt-about .dta-box__btn--ghost {
    background: transparent;
    border: 1px solid #3a3742;
    color: #e4e1e8;
    margin-top: 18px;
}

.dt-about .dta-box__btn--ghost:hover {
    background: #1c1b22;
    border-color: #d0161f;
}

/* 運営情報 */
.dt-about .dta-prof dt {
    font-size: 12px;
    color: #d0161f;
    font-weight: bold;
    letter-spacing: .06em;
    margin-top: 14px;
}

.dt-about .dta-prof dt:first-child {
    margin-top: 0;
}

.dt-about .dta-prof dd {
    font-size: 13px;
    line-height: 1.8;
    color: #cdc9d2;
    margin-top: 4px;
}

/* 関連リンク */
.dt-about .dta-links {
    list-style: none;
    padding: 0;
}

.dt-about .dta-links li {
    border-bottom: 1px solid #1f1e25;
}

.dt-about .dta-links li:last-child {
    border-bottom: none;
}

.dt-about .dta-links a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13.5px;
    color: #cdc9d2;
    padding: 13px 2px;
    transition: .2s;
}

.dt-about .dta-links a:hover {
    color: #d0161f;
    padding-left: 6px;
}

.dt-about .dta-links i {
    font-size: 10px;
    color: #6d6976;
}

/* ---------- CTA ---------- */
.dt-about .dta-cta {
    background:
        linear-gradient(90deg, rgba(10, 9, 11, .92) 0%, rgba(10, 9, 11, .6) 100%),
        url(/img/design/footer_torii.jpg) center 60% / cover no-repeat;
    border-top: 1px solid #1c1b20;
    border-bottom: 1px solid #1c1b20;
}

.dt-about .dta-cta__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 46px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.dt-about .dta-cta__text h2 {
    font-family: "Shippori Mincho", serif;
    font-size: 26px;
    font-weight: 800;
    color: #f2f0ed;
    letter-spacing: .08em;
    margin-bottom: 10px;
}

.dt-about .dta-cta__text p {
    font-size: 14px;
    color: #cdc9d2;
}

.dt-about .dta-cta__btn {
    flex-shrink: 0;
    background: #d0161f;
    color: #fff;
    font-size: 15px;
    font-weight: bold;
    padding: 15px 34px;
    border-radius: 4px;
    transition: .2s;
}

.dt-about .dta-cta__btn:hover {
    background: #b2121a;
}

/* ---------- レスポンシブ ---------- */
@media screen and (max-width: 1080px) {
    .dt-about .dta-feats,
    .dt-about .dta-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .dt-about .dta-layout {
        grid-template-columns: 1fr;
    }

    .dt-about .dta-conts {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 760px) {
    .dt-about .dta-hero__title {
        font-size: 34px;
    }

    .dt-about .dta-feats,
    .dt-about .dta-steps {
        grid-template-columns: 1fr;
    }

    .dt-about .dta-cta__inner {
        flex-direction: column;
        text-align: center;
    }
}