/*
 * DAISEN トップページ スタイルシート
 * daisen-top/daisen-top.css
 */

/* ===== リセット ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
button{cursor:pointer;border:none;background:none;font-family:inherit}

/* ===== CSS変数 ===== */
:root{
  --black:    #070710;
  --dark:     #0e0e1a;
  --surface:  #161625;
  --border:   #252540;
  --white:    #ffffff;
  --off-w:    #e4e4f2;
  --muted:    #7a7a99;
  --gold:     #ffd700;
  --gold-glow:#fff176;
  --blue:     #00c8e6;
  --blue-neon:#00ffe5;
  --font-d:   'Montserrat',sans-serif;
  --font-b:   'Noto Sans JP',sans-serif;
  --ease:     cubic-bezier(0.16,1,0.3,1);
  --ease-io:  cubic-bezier(0.4,0,0.2,1);
  --site-fcs: #00b4d8;
  --site-si:  #06d6a0;
  --site-psd: #7209b7;
  --site-nexus:#f72585;
  --site-log: #fb8500;
}

body.daisen-top{
  font-family:var(--font-b);
  background:var(--black);
  color:var(--off-w);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ===========================
   HEADER
   =========================== */
.dt-header{
  position:fixed;top:0;left:0;right:0;
  z-index:9999;
  height:68px;
  background:rgba(7,7,16,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .4s,box-shadow .4s;
}
.dt-header.scrolled{background:rgba(7,7,16,.98);box-shadow:0 4px 32px rgba(0,0,0,.6)}
.dt-header__inner{
  max-width:1400px;margin:0 auto;padding:0 32px;
  height:100%;display:flex;align-items:center;gap:16px;
}
.dt-logo{
	text-decoration: none !important;
	-webkit-text-decoration: none !important;
  display:flex;align-items:center;gap:12px;
  color:var(--white);
  font-family:var(--font-d);font-weight:900;font-size:1.15rem;
  letter-spacing:.14em;flex-shrink:0;
}

.dt-logo__mark-placeholder{
  width:36px;height:36px;border-radius:8px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#00c8e6,#0078ff);
  font-size:.9rem;font-weight:900;color:var(--black);
}

.dt-logo__mark {
  width:36px;height:36px;border-radius:0;
  display:block;
  background:transparent;
  box-shadow:none;
}
.dt-logo img{
  width:36px;height:36px;
  border-radius:0;
  object-fit:contain;
  background:transparent;
  display:block;
}

.dt-nav{
  margin-left:auto;
  display:flex;align-items:center;gap:2px;
}
.dt-nav__item{
	text-decoration: none !important;
	-webkit-text-decoration: none !important;
  font-family:var(--font-d);
  font-size:.72rem;font-weight:600;letter-spacing:.06em;
  color:var(--muted);
  padding:7px 11px;border-radius:7px;
  white-space:nowrap;
  transition:color .3s,background .3s;
}
.dt-nav__item:hover{color:var(--white);background:rgba(255,255,255,.07)
text-decoration: none !important;
}
.dt-nav__item--cta{
	text-decoration: none !important;
  background:linear-gradient(135deg,#00c8e6,#0078ff);
  color:var(--black)!important;font-weight:700;
  padding:7px 16px;margin-left:8px;
}
.dt-nav__item--cta:hover{opacity:.85;background:linear-gradient(135deg,#00c8e6,#0078ff)
text-decoration: none !important;
}

.dt-menu-toggle{
  display:none;flex-direction:column;gap:6px;
  padding:8px;margin-left:auto;
}
.dt-menu-toggle__bar{
  display:block;width:26px;height:2px;
  background:var(--white);border-radius:1px;
  transition:transform .35s var(--ease),opacity .35s;
}

/* ===========================
   HERO
   =========================== */
.dt-hero{
  position:relative;
  width:100%;height:100vh;min-height:600px;
  overflow:hidden;display:flex;align-items:center;justify-content:center;
}
.dt-hero__slides,.dt-vision__slides{
  position:absolute;inset:0;
}
.dt-hero__slide,.dt-vision__slide{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:0;transition:opacity 1.2s ease-in-out;
}
.dt-hero__slide.is-active,.dt-vision__slide.is-active{opacity:1}
.dt-hero__slide--empty{background:linear-gradient(135deg,#0a0a1e,#1a1a3a)}
.dt-hero__overlay{
  position:absolute;inset:0;
  background:linear-gradient(to bottom,rgba(7,7,16,.2),rgba(7,7,16,.55) 60%,rgba(7,7,16,.9));
  z-index:1;
}
.dt-hero__content{
  position:relative;z-index:2;
  text-align:center;padding:0 24px;
}
.dt-hero__eyebrow{
  font-family:var(--font-d);font-size:.7rem;font-weight:700;
  letter-spacing:.5em;color:var(--blue);
  margin-bottom:20px;
  opacity:0;transform:translateY(16px);
  animation:dtFadeUp .7s var(--ease) .4s forwards;
}
.dt-hero__headline{
  font-family:var(--font-d);
  font-size:clamp(2.2rem,5.5vw,4.8rem);
  font-weight:900;line-height:1.1;
  letter-spacing:-.02em;color:var(--white);
}
.dt-hero__line1,.dt-hero__line2{
  display:block;
  opacity:0;transform:translateY(32px);
}
.dt-hero__line1{animation:dtFadeUp .8s var(--ease) .6s forwards}
.dt-hero__line2{animation:dtFadeUp .8s var(--ease) .85s forwards}
.dt-hero__sub{
  font-family:var(--font-b);
  font-size:clamp(.9rem,2.2vw,1.2rem);
  color:rgba(255,255,255,.65);
  font-weight:300;letter-spacing:.18em;
  margin-top:20px;
  opacity:0;transform:translateY(16px);
  animation:dtFadeUp .7s var(--ease) 1.1s forwards;
}
.dt-hero__scroll-btn{
  position:absolute;bottom:40px;left:50%;transform:translateX(-50%);
  z-index:3;background:none;border:none;cursor:pointer;
  animation:dtScrollBlink 2.4s ease-in-out infinite;
}
.dt-hero__scroll-icon{display:block}
.dt-hero__scroll-dot{animation:dtDotDrop 2.4s ease-in-out infinite}

@keyframes dtFadeUp{to{opacity:1;transform:translateY(0)}}
@keyframes dtScrollBlink{0%,100%{opacity:.4}50%{opacity:1}}
@keyframes dtDotDrop{
  0%,100%{transform:translateY(0);opacity:1}
  80%{transform:translateY(18px);opacity:0}
}

/* ===========================
   VISION
   =========================== */
.dt-vision {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.dt-vision__slide--cosmos {
  background: linear-gradient(135deg, #000005 0%, #0a0024 40%, #001a2e 100%);
}
.dt-vision__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,10,.62);
  z-index: 1;
}
.dt-vision__inner {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 120px 24px 100px;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
}
.dt-vision__label {
  font-family: var(--font-d);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .5em;
  color: var(--blue);
  margin-bottom: 48px;
  opacity: .8;
}

/* ── KPIメッセージブロック ── */
.dt-vision__kpi-block {
  margin-bottom: 56px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}
.dt-vision__kpi-line {
  display: block; /* flexをやめてblock＋文字個別inline-blockに */
  text-align: center;
  white-space: nowrap; /* 意図しない折り返しを防ぐ */
}
.dt-vision__kpi-char {
  display: inline; /* iOS Safariで最も安定 */
  font-family: var(--font-b);
  font-size: clamp(1.1rem, 2.8vw, 1.9rem);
  font-weight: 700;
  letter-spacing: .06em;
  opacity: 0;
  /* transformをやめてopacityのみでフェード（Safari GPU最適化との競合回避） */
  transition: opacity .5s var(--ease);
}

/* 1行目：ゴールドグロー */
.dt-vision__kpi-line--1 .dt-vision__kpi-char {
  color: var(--gold);
  filter: drop-shadow(0 0 8px rgba(255,215,0,.9))
          drop-shadow(0 0 20px rgba(255,215,0,.5))
          drop-shadow(0 0 40px rgba(255,215,0,.25));
}

/* 2行目：ブルーネオン */
.dt-vision__kpi-line--2 .dt-vision__kpi-char {
  color: var(--blue-neon);
  filter: drop-shadow(0 0 6px rgba(0,255,229,1))
          drop-shadow(0 0 16px rgba(0,255,229,.6))
          drop-shadow(0 0 32px rgba(0,255,229,.3));
}

.dt-vision__kpi-char.shown {
  opacity: 1;
}

/* 区切りライン */
.dt-vision__kpi-block::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.3), transparent);
  margin-top: 8px;
}

/* ── 英語3行テキストブロック ── */
.dt-vision__en-block {
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.dt-vision__en-line {
  font-family: var(--font-d);
  font-size: clamp(1.6rem, 4.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--blue-neon);
  /* ★ text-shadow → filter（iOS Safari でグローが柔らかく出る） */
  filter: drop-shadow(0 0 12px var(--blue-neon))
          drop-shadow(0 0 32px rgba(0,200,230,.5));
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  white-space: nowrap;
}
#dt-vision-line-2 {
  font-size: clamp(1.4rem, 3.8vw, 3.2rem);
  opacity: .85;
}
.dt-vision__en-line.shown {
  opacity: 1;
  transform: translateY(0);
}
#dt-vision-line-2.shown { opacity: .85; }

/* ── 日本語テキスト ── */
.dt-vision__ja {
  margin-top: 28px;
  font-family: var(--font-b);
  font-size: clamp(1rem, 2.6vw, 1.6rem);
  font-weight: 700;
  letter-spacing: .14em;
  line-height: 1.7;
}
.dt-vision__ja-gold {
  color: var(--gold);
  text-shadow:
    0 0 30px rgba(255,215,0,.6),
    0 0 80px rgba(255,215,0,.3);
  animation: dtGoldGlow 3s ease-in-out infinite;
}
.dt-vision__ja-brand {
  font-family: var(--font-d);
  font-size: 1.4em;
  font-weight: 900;
  letter-spacing: .3em;
  display: block;
  margin-top: 12px;
}

@keyframes dtGoldGlow {
  0%,100% { text-shadow: 0 0 20px rgba(255,215,0,.5), 0 0 60px rgba(255,215,0,.2); }
  50%      { text-shadow: 0 0 40px rgba(255,215,0,.9), 0 0 100px rgba(255,215,0,.5), 0 0 160px rgba(255,215,0,.2); }
}

/* レスポンシブ */
@media (max-width: 768px) {
  .dt-vision__inner { padding: 80px 20px 80px; }
  .dt-vision__en-line { white-space: normal; word-break: keep-all; }
  .dt-vision__kpi-char { font-size: clamp(.95rem, 4vw, 1.4rem); }
}
@media (max-width: 480px) {
  .dt-vision__en-line { font-size: clamp(1.3rem, 8vw, 2.2rem); }
  #dt-vision-line-2   { font-size: clamp(1.1rem, 7vw, 1.9rem); }
}

/* ===========================
   BUSINESS
   =========================== */
.dt-business{
  position:relative;
  background:var(--dark);
  padding:120px 0;overflow:hidden;
}
.dt-business__bg-pattern{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.015) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.015) 1px,transparent 1px);
  background-size:80px 80px;
}
.dt-business__logos{
  position:absolute;right:5%;top:50%;transform:translateY(-50%);
  display:flex;flex-direction:column;gap:16px;
  opacity:.12;pointer-events:none;
}
.dt-business__logo-ai,.dt-business__logo-daisen{
  width:120px;height:120px;object-fit:contain;
}
.dt-business__logo-placeholder{
  width:120px;height:120px;border-radius:16px;
  display:grid;place-items:center;
  background:rgba(255,255,255,.04);
  font-family:var(--font-d);font-size:1.4rem;
  font-weight:900;color:rgba(255,255,255,.3);
}
.dt-business__inner{
  max-width:1280px;margin:0 auto;padding:0 40px;
}
.dt-section-header{
  margin-bottom:56px;
}
.dt-section-header--light .dt-section-label{color:rgba(255,255,255,.4)}
.dt-section-header--light .dt-section-title{color:var(--off-w)}
.dt-section-label{
  display:block;
  font-family:var(--font-d);font-size:.65rem;font-weight:700;
  letter-spacing:.5em;color:var(--muted);margin-bottom:12px;
}
.dt-section-label--log{color:var(--site-log)}
.dt-section-title{
  font-family:var(--font-d);
  font-size:clamp(1.8rem,4vw,3rem);
  font-weight:900;letter-spacing:-.02em;
  color:var(--white);line-height:1.15;
}
.dt-section-more{
  display:inline-block;margin-top:16px;
  font-family:var(--font-d);font-size:.8rem;font-weight:700;
  color:var(--muted);letter-spacing:.1em;
  transition:color .3s;
}
.dt-section-more:hover{color:var(--white)}

.dt-biz-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.dt-biz-card{
  background:rgba(255,255,255,.03);
  border:1px solid var(--border);
  border-radius:20px;
  padding:36px;
  position:relative;overflow:hidden;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s;
}
.dt-biz-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  transition:opacity .3s;
}
.dt-biz-card--fcs::before{background:linear-gradient(90deg,var(--site-fcs),transparent)}
.dt-biz-card--si::before{background:linear-gradient(90deg,var(--site-si),transparent)}
.dt-biz-card--psd::before{background:linear-gradient(90deg,var(--site-psd),transparent)}
.dt-biz-card--nexus::before{background:linear-gradient(90deg,var(--site-nexus),transparent)}
.dt-biz-card:hover{
  transform:translateY(-8px);
  box-shadow:0 24px 64px rgba(0,0,0,.4);
  border-color:rgba(255,255,255,.1);
}
.dt-biz-card__num{
  font-family:var(--font-d);font-size:3.5rem;font-weight:900;
  line-height:1;letter-spacing:-.04em;
  color:rgba(255,255,255,.06);
  position:absolute;top:24px;right:28px;
}
.dt-biz-card__title{
  font-family:var(--font-b);font-size:1.15rem;font-weight:700;
  color:var(--off-w);line-height:1.4;margin-bottom:12px;
}
.dt-biz-card__title small{font-size:.8em;font-weight:400;color:var(--muted)}
.dt-biz-card__lead{font-size:.875rem;color:var(--muted);margin-bottom:20px}
.dt-biz-card__tag{
  display:inline-block;
  font-size:.8rem;color:var(--site-si);
  background:rgba(6,214,160,.08);
  border:1px solid rgba(6,214,160,.2);
  border-radius:24px;padding:6px 16px;margin-top:8px;
}
.dt-biz-card__items{display:flex;flex-direction:column;gap:16px;margin-top:16px}
.dt-biz-item{display:flex;gap:12px;align-items:flex-start}
.dt-biz-item__num{
  flex-shrink:0;font-family:var(--font-d);font-size:.72rem;
  font-weight:700;color:var(--muted);margin-top:3px;
}

/* ビジネスカード リンク化 */
.dt-biz-card__link-wrap {
  display: block;
  color: inherit;
  text-decoration: none;
  height: 100%;
}
.dt-biz-card__arrow {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--font-d);
  font-size: .8rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .1em;
  transition: color .3s, transform .3s;
}
.dt-biz-card:hover .dt-biz-card__arrow {
  transform: translateX(6px);
}
.dt-biz-card--fcs:hover   .dt-biz-card__arrow { color: var(--site-fcs); }
.dt-biz-card--si:hover    .dt-biz-card__arrow { color: var(--site-si); }
.dt-biz-card--psd:hover   .dt-biz-card__arrow { color: var(--site-psd); }
.dt-biz-card--nexus:hover .dt-biz-card__arrow { color: var(--site-nexus); }

/* カード全体のカーソル */
.dt-biz-card { cursor: pointer; }

.dt-biz-item__label{
  flex-shrink:0;font-size:.8rem;font-weight:700;
  color:var(--off-w);white-space:nowrap;margin-top:2px;
}
.dt-biz-item strong{display:block;font-size:.875rem;color:var(--off-w);margin-bottom:4px}
.dt-biz-item p{font-size:.8rem;color:var(--muted);line-height:1.6}

/* ===========================
   ビジネス概要図
   =========================== */
.dt-biz-overview{
  margin-top:80px;text-align:center;
}
.dt-biz-overview__label{
  font-family:var(--font-d);font-size:.65rem;font-weight:700;
  letter-spacing:.5em;color:var(--muted);margin-bottom:32px;
  text-transform:uppercase;
}

/* ビジネス概要図 キャプション */
.dt-biz-overview__caption {
  font-family: var(--font-b);
  font-size: clamp(.88rem, 1.8vw, 1rem);
  color: rgba(228, 228, 242, 0.52);   /* --off-w の52%透明 */
  text-align: center;
  line-height: 2.0;
  margin: -16px 0 32px;              /* labelとframeの間に自然に収まる */
  letter-spacing: .06em;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  /* 微細なグロー：暗背景に溶け込みすぎず、図と調和する */
  text-shadow: 0 1px 12px rgba(0, 180, 216, 0.12);
}

@media (max-width: 768px) {
  .dt-biz-overview__caption {
    font-size: .85rem;
    line-height: 1.9;
    padding: 0 4px;
    margin: -12px 0 24px;
  }
}

.dt-biz-overview__frame{
  position:relative;display:inline-block;width:100%;max-width:1100px;
  border-radius:24px;overflow:hidden;
  box-shadow:0 0 0 1px rgba(255,255,255,.06),
             0 32px 100px rgba(0,0,0,.6),
             0 0 80px rgba(0,120,212,.12);
}
.dt-biz-overview__img{
  width:100%;height:auto;display:block;
  filter:brightness(.92) contrast(1.05);
  transition:filter .6s var(--ease),transform .8s var(--ease);
}
.dt-biz-overview__frame:hover .dt-biz-overview__img{
  filter:brightness(1) contrast(1.08);
  transform:scale(1.012);
}
.dt-biz-overview__glow{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(ellipse 60% 30% at 20% 80%, rgba(0,180,216,.08), transparent),
    radial-gradient(ellipse 60% 30% at 80% 20%, rgba(114,9,183,.06), transparent);
  mix-blend-mode:screen;
}

/* ===========================
   SITES（共通パーティクル背景）
   =========================== */
.dt-sites-bg{
  position:absolute;
  width:0;height:0;pointer-events:none;
}
#dt-particle-canvas{
  position:fixed;inset:0;
  width:100vw;height:100vh;
  pointer-events:none;
  z-index:0;
  opacity:0;
  transition:opacity .8s;
}
.dt-sites-visible #dt-particle-canvas{opacity:1}

/* ===========================
   SITE SECTIONS (FCS/SI/PSD/NEXUS)
   =========================== */
.dt-site-section{
  position:relative;z-index:1;
  background:linear-gradient(180deg,rgba(7,7,16,.97) 0%,rgba(10,10,22,.99) 100%);
  padding:120px 0;border-top:1px solid var(--border);
  overflow:hidden;
}
/* Aurora 背景レイヤー（各セクション固有カラー） */
.dt-site-section::before{
  content:'';
  position:absolute;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%,   var(--aurora-a,.1) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 0% 100%,  var(--aurora-b,.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 100% 50%, var(--aurora-c,.06) 0%, transparent 60%);
  animation:dtAuroraShift 12s ease-in-out infinite alternate;
}
@keyframes dtAuroraShift{
  0%  {opacity:.7; transform:scale(1)   translateY(0)}
  33% {opacity:1;  transform:scale(1.04) translateY(-1%)}
  66% {opacity:.85;transform:scale(.97)  translateY(1%)}
  100%{opacity:1;  transform:scale(1.02) translateY(-0.5%)}
}
.dt-site-section--fcs{
  --aurora-a:rgba(0,180,216,.15);
  --aurora-b:rgba(0,255,200,.08);
  --aurora-c:rgba(0,100,200,.10);
}
.dt-site-section--si{
  --aurora-a:rgba(6,214,160,.14);
  --aurora-b:rgba(0,200,150,.08);
  --aurora-c:rgba(0,180,120,.06);
}
.dt-site-section--psd{
  --aurora-a:rgba(114,9,183,.18);
  --aurora-b:rgba(180,0,200,.10);
  --aurora-c:rgba(80,0,140,.12);
}
.dt-site-section--nexus{
  --aurora-a:rgba(247,37,133,.16);
  --aurora-b:rgba(200,0,100,.08);
  --aurora-c:rgba(255,80,150,.10);
}
.dt-site-section > *{position:relative;z-index:1;}
.dt-site-section__inner{
  max-width:1280px;margin:0 auto;padding:0 40px;
  display:grid;
  grid-template-columns:1fr 1fr;
  grid-template-areas:'content visual';
  gap:80px;align-items:center;
}
/* FCS / PSD: 左=一覧 右=画像（デフォルト） */
.dt-site-section--fcs .dt-site-section__inner,
.dt-site-section--psd .dt-site-section__inner{
  grid-template-areas:'content visual';
}
.dt-site-section--fcs .dt-site-section__content,
.dt-site-section--psd .dt-site-section__content{grid-area:content}
.dt-site-section--fcs .dt-site-section__visual,
.dt-site-section--psd .dt-site-section__visual{grid-area:visual}
/* SI / NEXUS: 左=画像 右=一覧 */
.dt-site-section--si .dt-site-section__inner,
.dt-site-section--nexus .dt-site-section__inner{
  grid-template-areas:'visual content';
}
.dt-site-section--si .dt-site-section__content,
.dt-site-section--nexus .dt-site-section__content{grid-area:content}
.dt-site-section--si .dt-site-section__visual,
.dt-site-section--nexus .dt-site-section__visual{grid-area:visual}
.dt-site-section__meta{margin-bottom:28px}
.dt-site-section__label{
  display:block;font-family:var(--font-d);font-size:.65rem;font-weight:700;
  letter-spacing:.5em;margin-bottom:10px;
}
.dt-site-section--fcs .dt-site-section__label{color:var(--site-fcs)}
.dt-site-section--si  .dt-site-section__label{color:var(--site-si)}
.dt-site-section--psd .dt-site-section__label{color:var(--site-psd)}
.dt-site-section--nexus .dt-site-section__label{color:var(--site-nexus)}
.dt-site-section__title{
  font-family:var(--font-d);
  font-size:clamp(1.6rem,3.5vw,2.8rem);
  font-weight:900;letter-spacing:-.02em;
  color:var(--white);line-height:1.15;
}
.dt-site-section__news{
  list-style:none;display:flex;flex-direction:column;gap:4px;
  margin-bottom:28px;
}
.dt-site-section__news-item{
  display:flex;align-items:center;gap:10px;
  padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,.06);
  color:var(--off-w);font-size:.875rem;
  transition:color .3s,gap .3s;
}
.dt-site-section__news-item:hover{gap:14px}
.dt-site-section--fcs .dt-site-section__news-item:hover{color:var(--site-fcs)}
.dt-site-section--si  .dt-site-section__news-item:hover{color:var(--site-si)}
.dt-site-section--psd .dt-site-section__news-item:hover{color:var(--site-psd)}
.dt-site-section--nexus .dt-site-section__news-item:hover{color:var(--site-nexus)}
.dt-site-section__news-arrow{
  font-size:.8rem;opacity:.4;flex-shrink:0;transition:opacity .3s;
}
.dt-site-section__news-item:hover .dt-site-section__news-arrow{opacity:1}
.dt-site-section__news-empty{
  padding:16px 0;color:var(--muted);font-size:.875rem;
}
.dt-site-section__actions{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
}
.dt-site-section__site-btn{
  font-family:var(--font-d);font-size:.8rem;font-weight:700;
  color:var(--muted);letter-spacing:.1em;
  padding:8px 0;border-bottom:1px solid rgba(255,255,255,.2);
  transition:color .3s,border-color .3s;
}
.dt-site-section__site-btn:hover{color:var(--white);border-color:var(--white)}
.dt-site-section__learn-btn{
  position:relative;
  font-family:var(--font-d);font-size:.8rem;font-weight:700;
  letter-spacing:.14em;
  padding:12px 28px;border-radius:40px;
  display:inline-flex;align-items:center;gap:8px;overflow:visible;
}
.dt-site-section--fcs .dt-site-section__learn-btn{background:var(--site-fcs);color:var(--black)}
.dt-site-section--si  .dt-site-section__learn-btn{background:var(--site-si);color:var(--black)}
.dt-site-section--psd .dt-site-section__learn-btn{background:var(--site-psd);color:#fff}
.dt-site-section--nexus .dt-site-section__learn-btn{background:var(--site-nexus);color:#fff}
.dt-site-section__learn-btn:hover{opacity:.85}
.dt-learn-tooltip{
  position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);
  background:rgba(255,255,255,.95);color:var(--black);
  font-size:.72rem;font-weight:700;
  padding:5px 12px;border-radius:8px;white-space:nowrap;
  opacity:0;pointer-events:none;transition:opacity .25s;
}
.dt-site-section__learn-btn:hover .dt-learn-tooltip{opacity:1}

/* スライドショー */
.dt-slideshow{
  position:relative;
  width:100%;aspect-ratio:4/3;
  border-radius:20px;overflow:hidden;
  background:var(--surface);
  box-shadow:0 24px 80px rgba(0,0,0,.5);
}
.dt-slideshow__slide{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:0;transition:opacity 1s ease-in-out;
}
.dt-slideshow__slide.is-active{opacity:1}
.dt-slideshow__empty{
  position:absolute;inset:0;
  background:linear-gradient(135deg,var(--surface),var(--border));
}

/* ===========================
   LOG PORTAL
   =========================== */
.dt-log{
  position:relative;z-index:1;
  background:var(--dark);
  padding:120px 0;border-top:1px solid var(--border);
}
.dt-log__inner{
  max-width:1280px;margin:0 auto;padding:0 40px;
}
.dt-log-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:32px;
  margin-top:48px;
}
.dt-log-card{
  background:rgba(255,255,255,.03);border:1px solid var(--border);
  border-radius:16px;overflow:hidden;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .3s;
}
.dt-log-card:hover{
  transform:translateY(-8px);
  box-shadow:0 20px 56px rgba(0,0,0,.4);
  border-color:rgba(var(--site-log),.3);
}
.dt-log-card__link{display:block;color:inherit}
.dt-log-card__thumb{
  aspect-ratio:16/9;overflow:hidden;background:var(--surface);
}
.dt-log-card__thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s var(--ease);
}
.dt-log-card:hover .dt-log-card__thumb img{transform:scale(1.06)}
.dt-log-card__thumb-placeholder{
  width:100%;height:100%;
  background:linear-gradient(135deg,var(--surface),var(--border));
}
.dt-log-card__body{padding:24px}
.dt-log-card__title{
  font-size:1rem;font-weight:700;
  color:var(--off-w);line-height:1.5;margin-bottom:10px;
}
.dt-log-card__excerpt{
  font-size:.8rem;color:var(--muted);line-height:1.7;margin-bottom:12px;
}
.dt-log-card__more{
  font-family:var(--font-d);font-size:.72rem;font-weight:700;
  color:var(--site-log);letter-spacing:.06em;
}

/* ===========================
   CONTACT
   =========================== */
.dt-contact{
  position:relative;z-index:1;
  background:linear-gradient(180deg,var(--surface),var(--dark));
  padding:120px 0;border-top:1px solid var(--border);
  overflow:hidden;
}
.dt-contact::before{
  content:'';position:absolute;
  width:600px;height:600px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,200,230,.06),transparent 70%);
  top:-200px;right:-200px;pointer-events:none;
}
.dt-contact__inner{
  max-width:1280px;margin:0 auto;padding:0 40px;
}
.dt-contact__title{
  background:linear-gradient(90deg,var(--blue),var(--gold));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.dt-contact__body{
  display:grid;grid-template-columns:1fr 1fr;gap:80px;margin-top:56px;align-items:start;
}
.dt-contact__lead{
  font-family:var(--font-d);font-size:clamp(1.4rem,3vw,2.4rem);
  font-weight:900;line-height:1.3;color:var(--white);margin-bottom:24px;
}
.dt-contact__sub{
  font-size:.9rem;color:var(--muted);line-height:1.9;margin-bottom:28px;
}
.dt-contact__reasons{
  list-style:none;display:flex;flex-direction:column;gap:10px;margin-bottom:28px;
}
.dt-contact__reasons li{
  padding:10px 16px;
  background:rgba(255,255,255,.03);border-left:3px solid var(--blue);
  border-radius:0 8px 8px 0;font-size:.875rem;color:var(--off-w);
}
.dt-contact__cta-msg{
  font-size:.9rem;color:var(--off-w);line-height:1.8;
}
.dt-contact__cta-msg strong{color:var(--gold)}

/* CF7 スタイル */
.dt-contact__form{margin-top:60px}
.dt-contact__form .wpcf7-form-control{
  width:100%!important;padding:12px 16px!important;
  background:rgba(255,255,255,.04)!important;
  border:1.5px solid rgba(255,255,255,.1)!important;
  border-radius:10px!important;color:var(--off-w)!important;
  font-family:var(--font-b)!important;font-size:.9rem!important;
  transition:border-color .3s,background .3s!important;
}
.dt-contact__form .wpcf7-form-control:focus{
  border-color:var(--blue)!important;
  background:rgba(0,200,230,.04)!important;outline:none!important;
}
.dt-contact__form .wpcf7-submit{
  background:linear-gradient(135deg,var(--blue),#0078ff)!important;
  color:var(--black)!important;font-weight:700!important;
  border:none!important;padding:14px 36px!important;
  border-radius:10px!important;width:100%!important;
  font-size:.95rem!important;letter-spacing:.06em!important;
  cursor:pointer!important;transition:opacity .3s!important;margin-top:8px!important;
}
.dt-contact__form .wpcf7-submit:hover{opacity:.85!important}
.dt-contact__form-placeholder{
  background:rgba(255,255,255,.03);border:1px dashed var(--border);
  border-radius:12px;padding:32px;color:var(--muted);font-size:.875rem;
  line-height:1.8;text-align:center;
}

/* ===========================
   MAP
   =========================== */
.dt-map{
  position:relative;z-index:1;
  width:100%;height:480px;overflow:hidden;
  filter:grayscale(0) saturate(1.1) brightness(.9);
}
.dt-map iframe{
  width:100%;height:100%;border:0;display:block;
  pointer-events:all;
}

/* ===========================
   FOOTER
   =========================== */
.dt-footer{
  position:relative;z-index:1;
  background:var(--black);
  border-top:1px solid var(--border);
  padding:64px 0 36px;
  font-family:var(--font-d);
}
.dt-footer__inner{
  max-width:1280px;margin:0 auto;padding:0 40px;
}
.dt-footer__brand{
  display:flex;align-items:center;gap:12px;
  font-size:1.2rem;font-weight:900;letter-spacing:.14em;
  color:var(--white);margin-bottom:40px;
}
.dt-footer__brand-img{width:40px;height:40px;border-radius:8px;object-fit:contain}
.dt-footer__nav{
  display:flex;flex-wrap:wrap;gap:8px 20px;
  margin-bottom:40px;
}
.dt-footer__nav a{
  color:var(--muted);font-size:.78rem;font-weight:500;
  letter-spacing:.06em;transition:color .3s;
}
.dt-footer__nav a:hover{color:var(--white)}
.dt-footer__copy{
  font-size:.72rem;color:var(--muted);letter-spacing:.1em;
  border-top:1px solid var(--border);padding-top:28px;
}
.dt-footer__copy a{color:var(--off-w);font-weight:700;transition:color .3s}
.dt-footer__copy a:hover{color:var(--gold)}

/* ===========================
   スクロールリビール
   =========================== */
.ds-reveal{
  opacity:0;transform:translateY(32px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
.ds-reveal.ds-revealed{opacity:1;transform:none}

/* ===========================
   RESPONSIVE
   =========================== */
@media(max-width:1100px){
  .dt-biz-grid{grid-template-columns:1fr}
  .dt-site-section__inner{gap:48px}
  .dt-contact__body{grid-template-columns:1fr;gap:48px}
  .dt-log-grid{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:768px){
  .dt-log-grid{grid-template-columns:1fr}
  .dt-business__inner,.dt-log__inner,.dt-contact__inner,
  .dt-site-section__inner,.dt-footer__inner{padding:0 20px}
  .dt-site-section{padding:80px 0}
  .dt-business{padding:80px 0}
  .dt-log{padding:80px 0}
  .dt-contact{padding:80px 0}
  .dt-footer{padding:48px 0 28px}
  .dt-map{height:320px}
}

@media(max-width:480px){
  .dt-hero__headline{font-size:clamp(1.8rem,9vw,3rem)}
  .dt-vision__en{font-size:clamp(1.5rem,8vw,3rem)}
  .dt-footer__brand{margin-bottom:28px}
}

@media(max-width:640px){
  .dt-slideshow {
    aspect-ratio: 16/9;
    max-height: 200px;
    border-radius: 10px;
  }
}

/* ===========================
   Back to Top Button
   =========================== */
.dt-btt {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 9000;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), #0060d0);
  border: 1.5px solid rgba(255,255,255,.2);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  /* 初期状態：非表示 */
  opacity: 0;
  transform: translateY(16px) scale(.85);
  pointer-events: none;
  transition:
    opacity .45s cubic-bezier(0.16,1,0.3,1),
    transform .45s cubic-bezier(0.16,1,0.3,1),
    box-shadow .3s;
  box-shadow:
    0 4px 20px rgba(0,180,216,.35),
    0 0 0 0 rgba(0,180,216,.2);
}
.dt-btt.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.dt-btt:hover {
  box-shadow:
    0 8px 32px rgba(0,180,216,.55),
    0 0 0 8px rgba(0,180,216,.08);
  transform: translateY(-3px) scale(1.06);
}
.dt-btt:active {
  transform: scale(.96);
}

@media (max-width: 768px) {
  .dt-btt { bottom: 20px; right: 16px; width: 44px; height: 44px; }

  .dt-vision__inner { padding: 80px 20px 80px; }
  /* 文字送りアニメーション：スマホでは最初から表示 */
  .dt-vision__kpi-char {
    font-size: clamp(.9rem, 4vw, 1.3rem);
    /* スマホでは必ず表示されるよう、opacity初期値をCSSで上書き */
  }
  .dt-vision__en-line {
    white-space: normal;
    word-break: keep-all;
    font-size: clamp(1.3rem, 8vw, 2.2rem);
  }
  #dt-vision-line-2 { font-size: clamp(1.1rem, 6.5vw, 1.9rem); }
  .dt-vision__kpi-line { gap: 0; }
}

@media(max-width:900px){
  /* 既存の記述はそのまま維持 */
  .dt-nav{display:none}
  .dt-menu-toggle{display:flex}
  /* ... */

  /* スライドショーをスマホで適切なサイズに */
  .dt-site-section__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .dt-slideshow {
    aspect-ratio: 16/9; /* スマホでは横長に変更（縦長より自然） */
    border-radius: 12px;
    max-height: 260px;
  }
  .dt-site-section__visual {
    order: -1; /* 画像を上、テキストを下 */
  }
  .dt-site-section {
    padding: 72px 0;
  }
}

@media (max-width: 900px) {
  .dt-nav { display: none; }
  .dt-menu-toggle { display: flex; }
 
	
	.dt-nav.is-open {
    display: flex; flex-direction: column;
    position: fixed; top: 68px; left: 0; right: 0;
    background: rgba(7,7,16,.98);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px; gap: 4px; z-index: 9998;
  }

.dt-nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(7, 7, 16, .98);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    gap: 4px;
    z-index: 9999; /* LINE WebKit 対策 */
    -webkit-overflow-scrolling: touch;
  }
	
  .dt-nav.is-open .dt-nav__item--cta {
    background: linear-gradient(135deg,var(--blue),#0078ff);
    color: var(--black) !important; border-radius: 10px;
  }

  /* サイトセクション：スマホで1カラム化 */
  .dt-site-section__inner {
    grid-template-columns: 1fr !important;
    grid-template-areas: 'visual' 'content' !important;
    gap: 28px;
    padding: 0 20px;
  }
  /* すべてのセクションで visual を上、content を下 */
  .dt-site-section--fcs .dt-site-section__inner,
  .dt-site-section--si .dt-site-section__inner,
  .dt-site-section--psd .dt-site-section__inner,
  .dt-site-section--nexus .dt-site-section__inner {
    grid-template-areas: 'visual' 'content' !important;
  }
  .dt-site-section__visual {
    grid-area: visual !important;
    order: 1 !important;
    width: 100%;
  }
  .dt-site-section__content {
    grid-area: content !important;
    order: 2 !important;
  }

  /* スライドショー：スマホ表示 */
  .dt-slideshow {
    aspect-ratio: 16/9;
    border-radius: 12px;
    width: 100%;
    max-height: none;
  }
  .dt-slideshow__slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
  }
  .dt-slideshow__slide.is-active { opacity: 1; }

  .dt-business__logos { display: none; }
  .dt-site-section { padding: 72px 0; }
}