/* ===========================================================
   織境ホールディングス コーポレートサイト
   =========================================================== */

:root{
  --navy:#06111A;
  --deep:#03080D;
  --white:#F4F0E8;
  --gray:#AAA59D;
  --gold:#B8945A;
  --gold-light:#D3B77F;
  --line:rgba(255,255,255,.14);

  --mincho:"Yu Mincho","Hiragino Mincho ProN","Noto Serif JP",serif;
  --sans:"Helvetica Neue","Inter","Noto Sans JP",sans-serif;

  --header-h:88px;
  --wrap:1240px;
  --pad:48px;
  --sec-y:160px;

  --e-out:cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{color-scheme:dark;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--navy);
  color:var(--white);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  overflow-x:clip;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
ol,dl,dd{margin:0;padding:0}
li{list-style:none}

.wrap{width:min(var(--wrap),100% - var(--pad) * 2);margin-inline:auto}

.skip-link{
  position:absolute;left:16px;top:-80px;z-index:60;
  padding:12px 20px;background:var(--deep);color:var(--white);
  border:1px solid var(--gold);text-decoration:none;
  font-size:12px;letter-spacing:.14em;
  transition:top .25s var(--e-out);
}
.skip-link:focus-visible{top:16px}

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

/* ---------- 見出し共通 ---------- */

.eyebrow{
  margin:0;color:var(--gold);
  font-size:11px;font-weight:500;letter-spacing:.32em;line-height:1.4;
}
h1,h2{
  margin:0;font-family:var(--mincho);font-weight:400;color:var(--white);
  text-wrap:balance;
}
h2{
  margin-top:28px;
  font-size:clamp(28px,3vw,44px);line-height:1.5;letter-spacing:.06em;
}
.lead{
  margin:32px 0 0;color:var(--gray);
  font-size:15px;line-height:2.1;letter-spacing:.04em;
}

/* ---------- ヘッダ ---------- */

.site-header{
  position:absolute;z-index:30;top:0;left:0;width:100%;
  height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;
  padding-inline:max(var(--pad),env(safe-area-inset-left)) max(var(--pad),env(safe-area-inset-right));
  border-bottom:1px solid var(--line);
}
.brand{
  display:flex;align-items:center;gap:16px;
  padding-block:14px;
  text-decoration:none;
  transition:opacity .3s var(--e-out);
}
.brand-mark{display:flex;align-items:flex-end;gap:3px;width:26px;height:26px}
.brand-mark span{display:block;width:3px;background:var(--gold)}
.brand-mark span:nth-child(1){height:46%}
.brand-mark span:nth-child(2){height:72%}
.brand-mark span:nth-child(3){height:100%}
.brand-name{
  font-family:var(--mincho);font-size:15px;letter-spacing:.30em;
  white-space:nowrap;color:var(--white);
}
.brand:hover .brand-name{color:var(--gold-light)}
.brand:active{transform:translateY(4px) scale(.95)}

.nav-pc{display:flex;align-items:center;gap:40px}
.nav-pc a{
  position:relative;padding-block:18px;
  font-size:13px;letter-spacing:.1em;text-decoration:none;color:var(--white);
  transition:color .3s var(--e-out);
}
.nav-pc a::after{
  content:"";position:absolute;left:0;bottom:10px;
  width:0;height:1px;background:var(--gold);
  transition:width .35s var(--e-out);
}
.nav-pc a:hover{color:var(--gold-light)}
.nav-pc a:hover::after{width:100%}
.nav-pc a:active{transform:translateY(4px) scale(.95)}

.burger{
  display:none;
  width:48px;height:48px;padding:0;
  align-items:center;justify-content:center;flex-direction:column;gap:6px;
  background:transparent;border:1px solid var(--line);cursor:pointer;
  transition:border-color .3s var(--e-out),background-color .3s var(--e-out);
}
.burger span{
  display:block;width:20px;height:1px;background:var(--white);
  transition:transform .35s var(--e-out),opacity .2s linear;
}
.burger:hover{border-color:var(--gold)}
.burger:active{transform:translateY(4px) scale(.95);background:rgba(184,148,90,.16)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 携帯メニュー：閉じている間は完全に無効化する */
.nav-sp{
  position:fixed;z-index:29;top:var(--header-h);left:0;width:100%;
  display:grid;
  background:var(--deep);
  border-bottom:1px solid var(--line);
  transform:translateY(-100%);
  visibility:hidden;pointer-events:none;
  transition:transform .4s var(--e-out),visibility 0s linear .4s;
}
.nav-sp.is-open{transform:translateY(0);visibility:visible;pointer-events:auto;transition:transform .4s var(--e-out),visibility 0s}
.nav-sp a{
  padding:20px max(var(--pad),env(safe-area-inset-left));
  border-top:1px solid var(--line);
  font-size:14px;letter-spacing:.08em;text-decoration:none;
  transition:color .3s var(--e-out),background-color .3s var(--e-out);
}
.nav-sp a:first-child{border-top:0}
.nav-sp a:hover{color:var(--gold-light);background:rgba(184,148,90,.08)}
.nav-sp a:active{transform:translateY(4px) scale(.95);background:rgba(184,148,90,.18)}

/* ---------- ヒーロー ---------- */

.hero{
  position:relative;
  min-height:100vh;min-height:100svh;
  display:flex;align-items:center;
  overflow:hidden;
  background:var(--deep);
}
.hero-img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center;
}
.hero-veil{
  position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(3,8,13,.72) 0%,rgba(3,8,13,.18) 12%,transparent 22%),
    linear-gradient(90deg,rgba(3,8,13,.94) 0%,rgba(3,8,13,.78) 27%,rgba(3,8,13,.22) 53%,rgba(3,8,13,.05) 72%);
}
.hero-inner{position:relative;z-index:2;padding-block:var(--header-h) 0}
.hero-eyebrow{
  margin:0;color:var(--gold);
  font-size:11px;font-weight:500;letter-spacing:.35em;
}
#hero-title{
  margin-top:34px;
  font-size:clamp(58px,5vw,88px);
  font-weight:400;line-height:1.18;letter-spacing:.05em;
}
.hero-body{
  margin:42px 0 0;color:var(--white);
  font-size:15px;line-height:2.15;letter-spacing:.06em;
}

/* ---------- 枠線ボタン ---------- */

.btn-line{
  display:inline-flex;align-items:center;justify-content:space-between;gap:24px;
  padding:0 26px;
  color:var(--white);text-decoration:none;
  font-size:13px;letter-spacing:.14em;
  background:transparent;
  border:1px solid var(--gold);
  border-radius:0;
  transition:background-color .35s var(--e-out),color .35s var(--e-out),border-color .35s var(--e-out);
}
.btn-line .arw{color:var(--gold);transition:transform .35s var(--e-out),color .35s var(--e-out)}
.btn-line:hover{background:rgba(184,148,90,.14);border-color:var(--gold-light);color:var(--gold-light)}
.btn-line:hover .arw{transform:translateX(8px);color:var(--gold-light)}
.btn-line:active{transform:translateY(4px) scale(.95);background:rgba(184,148,90,.3)}

.hero-cta{width:290px;height:62px;margin-top:56px}

/* ---------- セクション共通 ---------- */

.sec{padding-block:var(--sec-y);border-top:1px solid var(--line)}
.sec-about{background:var(--navy)}
.sec-business{background:var(--deep)}
.sec-group{background:var(--navy)}
.sec-company{background:var(--deep)}
.sec-contact{background:var(--navy)}

/* ---------- ABOUT ---------- */

.about-grid{
  display:grid;grid-template-columns:minmax(min(420px,100%),1fr) minmax(0,1fr);
  gap:80px;align-items:center;
}
.about-photo img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:2px}

/* ---------- BUSINESS ---------- */

.biz-list{margin-top:72px;border-top:1px solid var(--line)}
.biz{
  position:relative;
  display:grid;
  grid-template-columns:88px minmax(180px,240px) minmax(0,1fr);
  align-items:baseline;gap:32px;
  padding-block:40px;
  border-bottom:1px solid var(--line);
  transition:background-color .35s var(--e-out);
}
.biz::after{
  content:"";position:absolute;left:0;bottom:-1px;
  width:0;height:1px;background:var(--gold);
  transition:width .5s var(--e-out);
}
.biz:hover{background:rgba(244,240,232,.035)}
.biz:hover::after{width:100%}
.biz-no{
  font-family:var(--mincho);font-size:13px;color:var(--gold);
  letter-spacing:.2em;font-variant-numeric:tabular-nums;
}
.biz-en{font-size:13px;letter-spacing:.2em;color:var(--white)}
.biz-ja{font-size:15px;line-height:1.95;letter-spacing:.04em;color:var(--gray)}

/* ---------- GROUP ---------- */

.grp-grid{
  margin-top:72px;
  display:grid;grid-template-columns:repeat(2,minmax(min(300px,100%),1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);
}
.grp{background:var(--navy);padding:56px 44px}
.grp-kind{margin:0;color:var(--gold);font-size:11px;letter-spacing:.24em}
.grp-name{
  margin:20px 0 0;font-family:var(--mincho);
  font-size:clamp(20px,2vw,27px);line-height:1.6;letter-spacing:.05em;
}
.grp-role{margin:24px 0 0;color:var(--gray);font-size:14px;line-height:1.95;letter-spacing:.04em}

/* ---------- COMPANY ---------- */

.co-table{margin-top:72px;border-top:1px solid var(--line)}
.co-row{
  display:grid;grid-template-columns:minmax(min(200px,100%),1fr) minmax(0,3fr);
  gap:32px;padding-block:28px;border-bottom:1px solid var(--line);
}
.co-row dt{color:var(--gray);font-size:13px;letter-spacing:.14em}
.co-row dd{font-size:15px;letter-spacing:.05em}

/* ---------- CONTACT ---------- */

.ct-actions{margin-top:56px;display:grid;gap:20px}
.ct-btn{
  width:100%;min-height:88px;
  padding:22px 32px;
  display:grid;grid-template-columns:88px minmax(0,1fr) 24px;
  align-items:center;gap:20px;justify-content:stretch;
}
.ct-label{color:var(--gold);font-size:11px;letter-spacing:.24em}
.ct-value{font-size:clamp(15px,1.5vw,20px);letter-spacing:.05em;overflow-wrap:anywhere;text-align:left}

/* ---------- フッタ ---------- */

.site-footer{background:var(--deep);border-top:1px solid var(--line);padding-block:64px 40px}
.foot-grid{
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.foot-brand{margin:0;font-family:var(--mincho);font-size:14px;letter-spacing:.3em}
.foot-nav{display:flex;gap:28px;flex-wrap:wrap}
.foot-nav a{
  font-size:12.5px;letter-spacing:.08em;color:var(--gray);text-decoration:none;
  padding-block:14px;transition:color .3s var(--e-out);
}
.foot-nav a:hover{color:var(--gold-light)}
.foot-nav a:active{transform:translateY(4px) scale(.95)}
.to-top{
  display:inline-flex;align-items:center;gap:12px;
  padding:14px 4px;
  font-size:12.5px;letter-spacing:.14em;text-decoration:none;color:var(--white);
  transition:color .3s var(--e-out);
}
.to-top .arw{color:var(--gold);transition:transform .35s var(--e-out)}
.to-top:hover{color:var(--gold-light)}
.to-top:hover .arw{transform:translateY(-5px)}
.to-top:active{transform:translateY(4px) scale(.95)}
.copy{
  margin:48px 0 0;text-align:center;
  color:var(--gray);font-size:11px;letter-spacing:.2em;
}

/* ---------- 404 ---------- */

.nf{min-height:100vh;min-height:100svh;display:grid;place-items:center;background:var(--deep);text-align:left}
.nf-inner{display:grid;justify-items:start;gap:0}
.nf-code{margin:0;font-family:var(--mincho);font-size:clamp(64px,10vw,120px);line-height:1;letter-spacing:.08em;color:var(--gold)}
.nf h1{margin-top:32px;font-size:clamp(24px,3vw,38px);line-height:1.5;letter-spacing:.06em}
.nf .btn-line{margin-top:56px;width:290px;height:62px}

/* ===========================================================
   1200px 以下
   =========================================================== */
@media (max-width:1200px){
  :root{--pad:36px;--sec-y:120px}
  .about-grid{gap:56px}
  .biz{grid-template-columns:72px minmax(150px,200px) minmax(0,1fr);gap:24px}
}

/* ===========================================================
   900px 以下：ハンバーガーへ
   =========================================================== */
@media (max-width:900px){
  :root{--pad:24px;--header-h:76px;--sec-y:96px}
  .nav-pc{display:none}
  .burger{display:flex}
  .brand-name{font-size:13px;letter-spacing:.22em}

  #hero-title{font-size:clamp(34px,8.6vw,52px);line-height:1.32;letter-spacing:.04em}
  .hero-body{margin-top:28px;font-size:14px;line-height:2}
  .hero-cta{width:100%;max-width:340px;height:58px;margin-top:40px}
  .hero-veil{
    background:
      linear-gradient(180deg,rgba(3,8,13,.82) 0%,rgba(3,8,13,.3) 13%,transparent 26%),
      linear-gradient(0deg,rgba(3,8,13,.95) 0%,rgba(3,8,13,.86) 30%,rgba(3,8,13,.5) 56%,rgba(3,8,13,.12) 78%,transparent 100%);
  }
  .hero{align-items:flex-end}
  .hero-inner{padding-block:0 72px}

  .about-grid{grid-template-columns:1fr;gap:40px}
  .about-photo{order:-1}

  .biz{grid-template-columns:auto 1fr;gap:8px 20px;padding-block:28px}
  .biz-no{grid-row:1}
  .biz-en{grid-row:1}
  .biz-ja{grid-column:1 / -1;grid-row:2;margin-top:6px}

  .grp-grid{grid-template-columns:1fr}
  .grp{padding:40px 28px}

  .co-row{grid-template-columns:1fr;gap:8px;padding-block:22px}

  .ct-btn{grid-template-columns:1fr 20px;gap:6px 16px;padding:20px 24px;min-height:84px}
  .ct-label{grid-column:1;grid-row:1}
  .ct-value{grid-column:1;grid-row:2}
  .ct-btn .arw{grid-column:2;grid-row:1 / span 2;justify-self:end}

  .foot-grid{flex-direction:column;align-items:flex-start;gap:24px}
  .foot-nav{gap:8px 22px}
}

/* ===========================================================
   420px 以下
   =========================================================== */
@media (max-width:420px){
  :root{--pad:20px}
  .brand{gap:12px}
  .brand-name{font-size:11.5px;letter-spacing:.18em}
  #hero-title{font-size:clamp(30px,8.8vw,38px)}
  .eyebrow{letter-spacing:.24em}
  .hero-eyebrow{letter-spacing:.26em;font-size:10px}
  .grp{padding:32px 22px}
}

/* ===========================================================
   動きを減らす設定
   =========================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .btn-line:active,.nav-pc a:active,.brand:active,.to-top:active,.foot-nav a:active,.nav-sp a:active,.burger:active{transform:none}
  .btn-line:active{background:rgba(184,148,90,.34)}
}

/* ===========================================================
   HERO 背景動画・入場演出・スクロール連動
   =========================================================== */

.hero-media{position:absolute;inset:0;overflow:hidden;transform-origin:50% 55%;will-change:transform}
.hero-img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center;
}
/* 開いた瞬間：画面ぜんぶがふわりと入る（文字は最初から場所を持っている） */
@keyframes heroIn{from{opacity:0}to{opacity:1}}
@keyframes ioIn{from{opacity:0;transform:translateY(25px)}to{opacity:1;transform:none}}
@keyframes headIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}

.hero.is-intro{animation:heroIn .8s var(--e-out) both}
.site-header{animation:headIn .9s var(--e-out) 0s both}
.hero .io{animation:ioIn 1.2s var(--e-out) both}
/* 見出しは待たせない。0.3秒の時点で読めていないと、開いた瞬間が空に見える */
.hero-eyebrow.io{animation-delay:0s}
#hero-title.io{animation-delay:0s}
.hero-body.io{animation-delay:.2s}
.hero-cta.io{animation-delay:.4s}

/* スクロールで、背景がわずかに寄り、文字が引く */
.hero-inner{will-change:opacity}

@media (prefers-reduced-motion:reduce){
  .hero.is-intro,.site-header,.hero .io{animation:none !important;opacity:1 !important;transform:none !important}
  .hero-media{transform:none !important}
  .hero-inner{opacity:1 !important}
}