@charset "utf-8";

/* =========================================================
   OJホールディングス株式会社 コーポレートサイト
   共通スタイルシート
   ---------------------------------------------------------
   意匠：墨色を基調とした縦罫のグリッド。見出しは明朝、
   　　　本文はゴシック。事業の連番は漢数字を用いる。
   ========================================================= */

:root{
  /* --- 色 --- */
  --sumi:       #101c26;   /* 墨色（基調） */
  --sumi-2:     #1b2b38;
  --ink:        #17222b;   /* 本文 */
  --ink-2:      #3c4a55;
  --muted:      #6d7a84;
  --muted-2:    #9aa4ac;
  --paper:      #f4f4f2;   /* 地 */
  --paper-2:    #fbfbfa;
  --white:      #ffffff;
  --ai:         #1f3a5f;   /* 藍（差し色・ごく少量） */
  --hairline:   #d9dad5;
  --hairline-2: #e8e8e4;
  --hairline-d: #2b3a46;   /* 墨地の上の罫 */

  /* --- 書体 --- */
  --mincho: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "MS PMincho", serif;
  --gothic: "Zen Kaku Gothic New", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;

  /* --- 版面 --- */
  --wrap: min(1120px, 100% - 4rem);
  --aside: 15rem;
  --gutter: 3.5rem;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--gothic);
  font-size: 15.5px;
  line-height: 2.05;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
}

img, svg{ max-width: 100%; }
a{ color: var(--ai); }
h1,h2,h3,h4{ margin: 0; font-weight: 700; text-wrap: balance; }
p{ margin: 0; }
ul,ol{ margin: 0; padding: 0; list-style: none; }

.wrap{ width: var(--wrap); margin-inline: auto; }

:where(a, button):focus-visible{
  outline: 2px solid var(--ai);
  outline-offset: 4px;
}

/* =========================================================
   ヘッダー
   ========================================================= */
.site-header{
  position: sticky; top: 0; z-index: 60;
  background: rgba(244,244,242,.93);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap{
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.25rem 2rem; flex-wrap: wrap;
  min-height: 82px; padding-block: .75rem;
}

.lockup{
  display: flex; align-items: center; gap: 1.05rem;
  text-decoration: none; color: var(--sumi);
}
.lockup .mark{ width: 40px; height: 30px; flex: none; color: var(--sumi); }
.lockup .bar{ width: 1px; height: 34px; background: var(--hairline); flex: none; }
.lockup .names{ display: flex; flex-direction: column; gap: .18rem; }
.lockup .ja{
  font-family: var(--mincho);
  font-size: 1.06rem; font-weight: 700;
  letter-spacing: .09em; line-height: 1.3; white-space: nowrap;
}
.lockup .en{
  font-family: var(--mincho);
  font-size: .56rem; font-weight: 600;
  letter-spacing: .3em; color: var(--muted-2); line-height: 1.3;
}

.site-nav{ display: flex; gap: 2.1rem; flex-wrap: wrap; }
.site-nav a{
  position: relative;
  font-size: .86rem; letter-spacing: .08em;
  color: var(--ink-2); text-decoration: none;
  padding-block: .35rem;
}
.site-nav a::after{
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: var(--sumi);
  transform: scaleX(0); transform-origin: left;
  transition: transform .28s cubic-bezier(.22,.61,.36,1);
}
.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after{ transform: scaleX(1); }
.site-nav a[aria-current="page"]{ color: var(--sumi); }

/* =========================================================
   ヒーロー（トップ）
   ========================================================= */
.hero{
  position: relative; overflow: hidden;
  background: var(--sumi); color: var(--white);
  padding: 8.5rem 0 7rem;
}
.hero::before{   /* 左の縦罫 */
  content: ""; position: absolute; top: 0; bottom: 0;
  left: max(2rem, calc((100% - min(1120px, 100% - 4rem)) / 2));
  width: 1px; background: var(--hairline-d);
}
.hero .watermark{
  position: absolute; right: -3rem; top: 50%; translate: 0 -50%;
  width: min(30rem, 42vw); color: #ffffff; opacity: .045;
  pointer-events: none;
}
.hero .wrap{ position: relative; padding-left: 3.25rem; }
.hero .eyebrow{
  display: block; font-family: var(--mincho);
  font-size: .64rem; font-weight: 600; letter-spacing: .42em;
  color: #8fa6bb; margin-bottom: 2.4rem;
}
.hero h1{
  font-family: var(--mincho);
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  font-weight: 700; line-height: 1.68; letter-spacing: .1em;
}
.hero .lead{
  margin-top: 2.6rem; max-width: 31em;
  font-size: .97rem; line-height: 2.25; color: #bdc8d1;
}
.hero .hr{ width: 76px; height: 1px; background: #52697c; margin-top: 3rem; }

@media (prefers-reduced-motion: no-preference){
  .hero .eyebrow, .hero h1, .hero .lead, .hero .hr{
    animation: rise .9s cubic-bezier(.22,.61,.36,1) both;
  }
  .hero h1{ animation-delay: .06s; }
  .hero .lead{ animation-delay: .14s; }
  .hero .hr{ animation-delay: .22s; }
  @keyframes rise{
    from{ opacity: 0; transform: translateY(14px); }
    to{ opacity: 1; transform: none; }
  }
}

/* =========================================================
   下層ページの扉
   ========================================================= */
.page-head{
  position: relative; overflow: hidden;
  background: var(--sumi); color: var(--white);
  padding: 4.6rem 0 4.2rem;
}
.page-head::before{
  content: ""; position: absolute; top: 0; bottom: 0;
  left: max(2rem, calc((100% - min(1120px, 100% - 4rem)) / 2));
  width: 1px; background: var(--hairline-d);
}
.page-head .wrap{ position: relative; padding-left: 3.25rem; }
.page-head .eyebrow{
  display: block; font-family: var(--mincho);
  font-size: .62rem; font-weight: 600; letter-spacing: .4em;
  color: #8fa6bb; margin-bottom: 1.1rem;
}
.page-head h1{
  font-family: var(--mincho);
  font-size: clamp(1.6rem, 3.6vw, 2.15rem);
  letter-spacing: .14em; font-weight: 700;
}

/* =========================================================
   セクション（非対称グリッド）
   ========================================================= */
.sec{ padding: 6rem 0; }
.sec.paper2{ background: var(--paper-2); border-block: 1px solid var(--hairline); }
.sec .wrap{
  display: grid;
  grid-template-columns: var(--aside) 1fr;
  column-gap: var(--gutter);
}
.sec-aside{
  border-top: 2px solid var(--sumi);
  padding-top: 1.1rem;
}
.sec-aside .eyebrow{
  display: block; font-family: var(--mincho);
  font-size: .6rem; font-weight: 600; letter-spacing: .34em;
  color: var(--muted-2); margin-bottom: .75rem;
}
.sec-aside h2{
  font-family: var(--mincho);
  font-size: 1.42rem; letter-spacing: .12em; line-height: 1.6;
}
.sec-body{ padding-top: .35rem; }
.sec-intro{
  font-size: .97rem; color: var(--ink-2);
  max-width: 40em; margin-bottom: 3rem;
}

/* =========================================================
   事業領域（漢数字の連番／罫線のみ）
   ========================================================= */
.fields{ border-top: 1px solid var(--hairline); }
.fields > li{
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  column-gap: 2rem;
  padding: 2.6rem 0;
  border-bottom: 1px solid var(--hairline);
}
.fields .num{
  font-family: var(--mincho);
  font-size: 2.05rem; font-weight: 500; line-height: 1.2;
  color: var(--muted-2);
  letter-spacing: .05em;
  transition: color .3s ease;
}
.fields > li:hover .num{ color: var(--ai); }
.fields h3{
  font-family: var(--mincho);
  font-size: 1.32rem; letter-spacing: .09em; line-height: 1.6;
  margin-bottom: .95rem;
}
.fields p{
  font-size: .94rem; color: var(--ink-2); max-width: 42em;
}
.fields .tags{
  display: flex; flex-wrap: wrap; gap: .45rem 1.4rem;
  margin-top: 1.3rem;
}
.fields .tags li{
  font-size: .78rem; letter-spacing: .08em; color: var(--muted);
  position: relative; padding-left: .85rem;
}
.fields .tags li::before{
  content: ""; position: absolute; left: 0; top: .82em;
  width: 5px; height: 1px; background: var(--muted-2);
}

/* =========================================================
   定義リスト（会社概要）
   ========================================================= */
.deflist{ border-top: 2px solid var(--sumi); }
.deflist .row{
  display: grid;
  grid-template-columns: 11rem 1fr;
  column-gap: 2.5rem;
  padding: 1.55rem 0;
  border-bottom: 1px solid var(--hairline);
}
.deflist dt{
  font-size: .86rem; font-weight: 500;
  letter-spacing: .14em; color: var(--muted);
}
.deflist dd{ margin: 0; font-size: .97rem; color: var(--ink); }
.deflist dd .en{
  display: block; margin-top: .2rem;
  font-size: .76rem; letter-spacing: .16em; color: var(--muted-2);
}
.deflist .purpose{
  display: flex; flex-direction: column; gap: .55rem;
  counter-reset: p;
}
.deflist .purpose li{
  counter-increment: p;
  display: grid; grid-template-columns: 2.2rem 1fr;
  font-size: .91rem; line-height: 1.95; color: var(--ink-2);
}
.deflist .purpose li::before{
  content: counter(p) ".";
  color: var(--muted-2); font-size: .82rem; letter-spacing: .04em;
}

/* =========================================================
   本文ブロック（個人情報保護方針）
   ========================================================= */
.prose{ max-width: 46rem; }
.prose > * + *{ margin-top: 1.45rem; }
.prose h2{
  font-family: var(--mincho);
  font-size: 1.08rem; letter-spacing: .1em;
  margin-top: 3rem; padding-bottom: .6rem;
  border-bottom: 1px solid var(--hairline);
}
.prose h2:first-of-type{ margin-top: 0; }
.prose p, .prose li{ font-size: .94rem; color: var(--ink-2); }
.prose ol{
  display: flex; flex-direction: column; gap: .5rem;
  counter-reset: q;
}
.prose ol li{
  counter-increment: q;
  display: grid; grid-template-columns: 2.2rem 1fr;
}
.prose ol li::before{
  content: "（" counter(q) "）";
  color: var(--muted-2); font-size: .82rem;
}
.prose .sign{
  margin-top: 3.2rem; padding-top: 1.5rem;
  border-top: 1px solid var(--hairline);
  font-size: .86rem; color: var(--muted); line-height: 2.1;
}

/* =========================================================
   連絡先
   ========================================================= */
.contact{ border-top: 2px solid var(--sumi); }
.contact > li{
  display: grid; grid-template-columns: 9rem 1fr;
  column-gap: 2.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--hairline);
}
.contact .label{
  font-family: var(--mincho);
  font-size: .62rem; font-weight: 600; letter-spacing: .3em;
  color: var(--muted-2); padding-top: .55rem;
}
.contact .value{
  font-family: var(--mincho);
  font-size: 1.24rem; font-weight: 700; letter-spacing: .06em;
  line-height: 1.75; word-break: break-word;
}
.contact .value a{ text-decoration: none; color: inherit; border-bottom: 1px solid var(--hairline); }
.contact .value a:hover{ border-bottom-color: var(--sumi); }
.contact .sub{
  margin-top: .5rem; font-size: .85rem; color: var(--muted);
}
.placeholder{
  display: inline-block;
  font-family: var(--gothic);
  font-size: .86rem; font-weight: 500; letter-spacing: .02em;
  color: #9a5a2c; background: #fbf1e7;
  border: 1px dashed #d2a277; border-radius: 1px;
  padding: .12rem .6rem;
}

/* =========================================================
   誘導帯
   ========================================================= */
.band{
  background: var(--sumi); color: var(--white);
  padding: 4.4rem 0;
}
.band .wrap{
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.75rem 3rem; flex-wrap: wrap;
}
.band h2{
  font-family: var(--mincho);
  font-size: 1.5rem; letter-spacing: .14em;
}
.band p{ margin-top: .75rem; font-size: .9rem; color: #a9b6c1; }

.link-arrow{
  display: inline-flex; align-items: center; gap: .9rem;
  font-family: var(--mincho);
  font-size: .98rem; font-weight: 700; letter-spacing: .14em;
  color: var(--white); text-decoration: none;
  padding-bottom: .45rem; border-bottom: 1px solid #52697c;
  transition: border-color .25s ease;
}
.link-arrow:hover{ border-bottom-color: var(--white); }
.link-arrow .ar{
  width: 30px; height: 1px; background: currentColor; position: relative;
  transition: width .28s cubic-bezier(.22,.61,.36,1);
}
.link-arrow .ar::after{
  content: ""; position: absolute; right: 0; top: -3px;
  width: 7px; height: 7px;
  border-top: 1px solid currentColor; border-right: 1px solid currentColor;
  transform: rotate(45deg);
}
.link-arrow:hover .ar{ width: 42px; }

.link-arrow.dark{ color: var(--sumi); border-bottom-color: var(--hairline); }
.link-arrow.dark:hover{ border-bottom-color: var(--sumi); }

/* =========================================================
   フッター
   ========================================================= */
.site-footer{
  background: var(--sumi); color: #94a3ae;
  padding: 4.6rem 0 2.6rem; font-size: .85rem;
}
.site-footer .top{
  display: grid; grid-template-columns: 1fr auto;
  gap: 2.5rem 4rem;
  padding-bottom: 2.6rem; border-bottom: 1px solid var(--hairline-d);
}
.site-footer .mark{ width: 44px; height: 33px; color: #fff; margin-bottom: 1.5rem; display: block; }
.site-footer .name{
  font-family: var(--mincho);
  font-size: 1.06rem; font-weight: 700; letter-spacing: .1em;
  color: #fff; margin-bottom: .9rem;
}
.site-footer address{ font-style: normal; line-height: 2.05; }
.site-footer nav{ display: flex; flex-direction: column; gap: .7rem; }
.site-footer nav a{
  color: #94a3ae; text-decoration: none; letter-spacing: .08em;
  transition: color .2s ease;
}
.site-footer nav a:hover{ color: #fff; }
.site-footer .copy{
  margin-top: 1.8rem;
  font-family: var(--mincho);
  font-size: .64rem; letter-spacing: .22em; color: #5d6d79;
}

/* =========================================================
   レスポンシブ
   ========================================================= */
@media (max-width: 900px){
  :root{ --aside: 100%; --gutter: 0rem; --wrap: min(1120px, 100% - 2.5rem); }
  .sec{ padding: 4rem 0; }
  .sec .wrap{ grid-template-columns: 1fr; row-gap: 2rem; }
  .sec-aside{ padding-bottom: 0; }
  .sec-intro{ margin-bottom: 2rem; }
  .hero{ padding: 5rem 0 4.2rem; }
  .hero .wrap, .page-head .wrap{ padding-left: 1.9rem; }
  .hero::before, .page-head::before{ left: 1.25rem; }
  .hero .watermark{ width: 17rem; right: -4.5rem; opacity: .04; }
  .fields > li{ grid-template-columns: 2.6rem 1fr; column-gap: 1.1rem; padding: 2rem 0; }
  .fields .num{ font-size: 1.35rem; }
  .deflist .row,
  .contact > li{ grid-template-columns: 1fr; row-gap: .5rem; }
  .contact .label{ padding-top: 0; }
  .site-footer .top{ grid-template-columns: 1fr; }
}

@media (max-width: 560px){
  body{ font-size: 15px; }
  .lockup .ja{ font-size: .95rem; }
  .site-nav{ gap: 1.35rem; }
  .site-header .wrap{ min-height: 0; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation: none !important; transition: none !important; }
}

/* =========================================================
   印刷
   ========================================================= */
@media print{
  .site-header, .band, .site-footer nav{ display: none; }
  body{ background: #fff; }
  .hero, .page-head, .site-footer{ background: #fff; color: #000; }
  .hero .watermark{ display: none; }
}