/* ===========================================================
   ixaid corporate site — shared stylesheet
   2026-06-29 Docs部門作成
   デザイン方針：details.co.jp 風の「明るいミニマル・エディトリアル」
   モノトーン基調（白/黒/グレー）・大きな余白・和欧併記・ヘアライン
   =========================================================== */

:root{
  --ink:#141414;        /* ニアブラック（主役） */
  --ink-2:#1f1f1f;
  --accent:#141414;     /* アクセント＝ブラック（モノトーン） */
  --accent-2:#9a9a9a;   /* ミューテッドグレー（ラベル等） */
  --bg:#ffffff;
  --bg-soft:#f5f4f1;    /* ごく淡いニュートラル */
  --line:#e7e4df;       /* ヘアライン */
  --text:#1c1c1c;
  --muted:#6e6e6e;
  --radius:14px;
  --maxw:1180px;
  --font:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",-apple-system,BlinkMacSystemFont,sans-serif;
  --serif:"Times New Roman","Hiragino Mincho ProN",serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.85;-webkit-font-smoothing:antialiased;letter-spacing:.01em}
.page-transition{position:fixed;inset:0;z-index:9999;pointer-events:none;color:#fff;visibility:visible}
.page-transition__panel{position:absolute;left:0;width:100%;height:50.5%;background:#111;transform:translateY(0);transition:transform .82s cubic-bezier(.76,0,.24,1);will-change:transform}
.page-transition__panel--top{top:0}
.page-transition__panel--bottom{bottom:0}
.page-transition__bar{position:absolute;left:0;width:100%;height:4px;background:#000;transform:scaleX(1);transition:transform .58s cubic-bezier(.76,0,.24,1),opacity .28s ease;will-change:transform,opacity}
.page-transition__bar--top{top:0;transform-origin:left}
.page-transition__bar--bottom{bottom:0;transform-origin:right}
.page-transition__center{position:absolute;left:50%;top:50%;display:flex;align-items:center;gap:22px;transform:translate(-50%,-50%);font-family:var(--serif);font-style:italic;font-size:.86rem;letter-spacing:.08em;color:rgba(255,255,255,.72);opacity:1;transition:opacity .26s ease,transform .56s cubic-bezier(.76,0,.24,1);white-space:nowrap}
.page-transition__center::before,
.page-transition__center::after{content:"";display:block;width:70px;height:1px;background:rgba(255,255,255,.34);transform:scaleX(1);transition:transform .56s cubic-bezier(.76,0,.24,1)}
.page-ready .page-transition{visibility:hidden;transition:visibility 0s linear .9s}
.page-ready .page-transition__panel--top{transform:translateY(-101%)}
.page-ready .page-transition__panel--bottom{transform:translateY(101%)}
.page-ready .page-transition__bar{opacity:0;transform:scaleX(0)}
.page-ready .page-transition__center{opacity:0;transform:translate(-50%,-56%)}
.page-ready .page-transition__center::before,
.page-ready .page-transition__center::after{transform:scaleX(0)}
.page-leaving .page-transition{visibility:visible;transition:none}
.page-leaving .page-transition__panel{transform:translateY(0)}
.page-leaving .page-transition__bar{opacity:1;transform:scaleX(1)}
.page-leaving .page-transition__center{opacity:1;transform:translate(-50%,-50%);transition-delay:.18s}
.page-leaving .page-transition__center::before,
.page-leaving .page-transition__center::after{transform:scaleX(1);transition-delay:.12s}
@media (prefers-reduced-motion: reduce){
  .page-transition{display:none}
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.accent{color:var(--accent)}
/* 欧文の小ラベル（エディトリアル） */
.eyebrow{font-family:var(--serif);font-style:italic;font-size:.92rem;letter-spacing:.04em;font-weight:400;color:var(--muted);margin-bottom:16px}
.center{margin-left:auto;margin-right:auto;text-align:center}

.btn{display:inline-flex;align-items:center;gap:8px;background:var(--ink);color:#fff;font-weight:600;padding:14px 30px;border-radius:999px;font-size:.9rem;transition:opacity .2s,transform .15s;border:none;cursor:pointer}
.btn:hover{opacity:.82;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;opacity:1}

/* ---------- Header ---------- */
header{position:sticky;top:0;z-index:80;background:#111;border-bottom:1px solid rgba(255,255,255,.12)}
.nav{display:flex;align-items:center;justify-content:space-between;height:80px}
.logo{display:inline-flex;align-items:center;line-height:0}
.logo-img{height:28px;width:auto;display:block}
.menu{display:flex;gap:34px;align-items:center}
.menu a{font-size:.9rem;font-weight:500;color:rgba(255,255,255,.82);transition:color .2s;position:relative}
.menu a:not(.btn):hover,.menu a.is-active:not(.btn){color:#fff}
.menu a.btn{background:#fff;color:var(--ink);font-size:.85rem;padding:11px 24px}
.menu a.btn:hover{color:var(--ink);opacity:.88}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:1.5px;background:#fff;transition:.3s}

/* ---------- Sub-page hero（ライト） ---------- */
.page-hero{position:relative;isolation:isolate;min-height:520px;display:flex;align-items:flex-end;background:#111;color:#fff;border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;z-index:-2;background:center / cover no-repeat;filter:brightness(.7) saturate(.9)}
.page-hero::after{content:"";position:absolute;inset:0;z-index:-1;background:
  linear-gradient(90deg, rgba(0,0,0,.72) 0%, rgba(0,0,0,.42) 48%, rgba(0,0,0,.18) 100%),
  linear-gradient(180deg, rgba(0,0,0,.12) 0%, rgba(0,0,0,.68) 100%)}
.page-hero-service::before{background-image:url('/assets/img/service-design-260629.png')}
.page-hero-works::before{background-image:url('/assets/img/digital-marketing-260629.png')}
.page-hero-members::before{background-image:url('/assets/img/approach-people-260629.png')}
.page-hero-about::before{background-image:url('/assets/img/communication-design-260629.png')}
.page-hero-contact::before{background-image:url('/assets/img/content-design-260629.png')}
.page-hero .wrap{width:100%;padding:118px 32px 86px}
.breadcrumb{font-size:.78rem;letter-spacing:.06em;color:var(--muted);margin-bottom:26px}
.page-hero .breadcrumb{color:rgba(255,255,255,.7)}
.page-hero .breadcrumb a:hover{color:#fff}
.page-hero h1{font-size:clamp(2.7rem,6vw,5.4rem);font-weight:700;line-height:1.08;color:#fff;letter-spacing:.02em;text-shadow:0 8px 44px rgba(0,0,0,.42)}
.page-hero p{margin-top:24px;color:rgba(255,255,255,.78);max-width:700px;font-size:1.04rem;text-shadow:0 4px 22px rgba(0,0,0,.34)}

/* ---------- Home hero（全面動画・固定パララックス） ---------- */
/* 動画は画面に固定。コンテンツ(.page-content)がその上をスクロールして動画が背景に残る */
.hero-bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:#0b0b0d}
.hero-bg .hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-bg .hero-scrim{position:absolute;inset:0;background:
  radial-gradient(120% 80% at 50% 30%, transparent 40%, rgba(8,8,11,.35) 100%),
  linear-gradient(180deg, rgba(8,8,11,.50) 0%, rgba(8,8,11,.22) 38%, rgba(8,8,11,.72) 100%)}
.hero-full{min-height:100vh;display:flex;align-items:flex-end;color:#fff;position:relative}
.hero-full .wrap{padding:0 32px 120px}
.hero-full .eyebrow{display:flex;align-items:center;gap:10px;color:rgba(255,255,255,.88)}
.hero-full .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:#fff}
.hero-full h1{font-size:clamp(2.9rem,7.5vw,6.4rem);font-weight:700;line-height:1.16;letter-spacing:.02em;text-shadow:0 4px 50px rgba(0,0,0,.45)}
.hero-full .lead{margin-top:30px;font-size:clamp(1rem,1.5vw,1.22rem);color:rgba(255,255,255,.92);max-width:620px;line-height:1.95;text-shadow:0 2px 24px rgba(0,0,0,.45)}
.hero-full .hero-cta{margin-top:42px;display:flex;gap:14px;flex-wrap:wrap}
.hero-full .hero-cta .btn{background:#fff;color:var(--ink)}
.hero-full .hero-cta .btn:hover{opacity:.85}
.hero-full .hero-cta .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.hero-full .hero-cta .btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff;opacity:1}
.hero-full .scroll-cue{position:absolute;left:50%;bottom:32px;transform:translateX(-50%);font-family:var(--serif);font-style:italic;font-size:.82rem;letter-spacing:.06em;color:rgba(255,255,255,.85);display:flex;flex-direction:column;align-items:center;gap:12px}
.hero-full .scroll-cue::after{content:"";width:1px;height:48px;background:linear-gradient(180deg,rgba(255,255,255,.9),transparent);animation:cue 2s infinite}
@keyframes cue{0%{opacity:0;transform:scaleY(.2);transform-origin:top}45%{opacity:1;transform:scaleY(1);transform-origin:top}55%{opacity:1}100%{opacity:0;transform:scaleY(.2);transform-origin:bottom}}
/* 固定動画の上に乗るコンテンツ層（不透明・白背景） */
.page-content{position:relative;z-index:1;background:var(--bg)}

/* ---------- Trust stats（ライト・ヘアライン） ---------- */
.trust{background:var(--bg)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{text-align:center;padding:44px 16px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat .num{font-size:2rem;font-weight:700;color:var(--ink);letter-spacing:.02em}
.stat .lbl{font-size:.8rem;color:var(--muted);margin-top:6px}

/* ---------- Sections ---------- */
section{padding:120px 0}
.sec-head{max-width:720px;margin-bottom:60px}
.sec-head h2{font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:700;color:var(--ink);line-height:1.45;letter-spacing:.02em}
.sec-head p{margin-top:18px;color:var(--muted)}
.soft{background:var(--bg-soft)}

/* ---------- Cards ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
/* grid-2 はヘアライン区切りの編集グリッド */
.grid-2 .card{border:none;border-radius:0;background:var(--bg)}
.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:44px 38px;transition:background .25s}
.grid-2 .card:hover{background:var(--bg-soft);transform:none;box-shadow:none}
.service-detail-grid{width:100%;max-width:none;padding-left:clamp(22px,11vw,220px);padding-right:clamp(22px,11vw,220px);background:var(--line)}
.service-detail-grid .card{background:var(--bg);padding-left:clamp(38px,5vw,84px);padding-right:clamp(38px,5vw,84px)}
.grid-3 .card:hover{background:var(--bg-soft)}
.card .ic{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:var(--ink);margin-bottom:24px}
.card h3{font-size:1.15rem;color:var(--ink);margin-bottom:12px;font-weight:700}
.card p{color:var(--muted);font-size:.94rem}
.card .en{font-family:var(--serif);font-style:italic;font-size:.86rem;color:var(--muted);margin-bottom:8px}

/* ---------- Why ---------- */
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.why-list{list-style:none;display:flex;flex-direction:column;gap:0}
.why-list li{display:flex;gap:22px;padding:26px 0;border-top:1px solid var(--line)}
.why-list li:last-child{border-bottom:1px solid var(--line)}
.why-list .no{flex:0 0 auto;font-family:var(--serif);font-style:italic;font-size:1.1rem;color:var(--muted);min-width:34px}
.why-list h4{font-size:1.05rem;color:var(--ink);margin-bottom:6px;font-weight:700}
.why-list p{color:var(--muted);font-size:.92rem}
.why-visual{position:relative;isolation:isolate;overflow:hidden;background:#111;border:1px solid rgba(0,0,0,.12);border-radius:18px;padding:56px;color:#fff;min-height:360px;display:flex;flex-direction:column;justify-content:center}
.why-visual::before{content:"";position:absolute;inset:0;z-index:-2;background:url('/assets/img/hero-hands-overlay-260629.png') 62% center / cover no-repeat;filter:grayscale(1) contrast(1) brightness(1.58);transform:scale(1.04)}
.why-visual::after{content:"";position:absolute;inset:0;z-index:-1;background:
  linear-gradient(90deg, rgba(0,0,0,.80) 0%, rgba(0,0,0,.58) 42%, rgba(0,0,0,.08) 100%),
  linear-gradient(180deg, rgba(0,0,0,.06) 0%, rgba(0,0,0,.34) 100%)}
.why-visual .big{font-size:2.6rem;font-weight:700;line-height:1.3;letter-spacing:.02em}
.why-visual .big .accent{color:rgba(255,255,255,.66)}
.why-visual p{color:rgba(255,255,255,.7);margin-top:18px}
.why-visual .eyebrow{color:rgba(255,255,255,.68)!important}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.step{padding:34px 26px 34px 0;border-top:2px solid var(--ink);counter-increment:step;margin-right:24px}
.step::before{content:"0" counter(step);font-family:var(--serif);font-style:italic;font-size:1.4rem;color:var(--muted);display:block;margin-bottom:14px}
.steps{counter-reset:step}
.step h4{color:var(--ink);margin:0 0 8px;font-weight:700}
.step p{color:var(--muted);font-size:.9rem}

/* ---------- Capability chips ---------- */
.cap-wrap{display:flex;flex-wrap:wrap;gap:10px}
.cap{border:1px solid var(--ink);background:var(--bg);border-radius:999px;padding:11px 22px;font-weight:500;color:var(--ink);font-size:.9rem}
.cap.partner{border-color:var(--line);color:var(--muted)}

/* ---------- Clients ---------- */
.logo-row{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:8px}
.chip{border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:12px 26px;font-weight:500;color:var(--ink);font-size:.92rem}

/* ---------- Works ---------- */
.works-cat{margin-bottom:64px}
.works-cat h3{font-size:1.45rem;color:var(--ink);margin-bottom:8px;display:grid;grid-template-columns:220px 1fr;align-items:baseline;gap:28px;font-weight:700;padding-bottom:20px;border-bottom:1px solid var(--ink)}
.works-cat h3 .badge{font-family:var(--serif);font-style:italic;font-size:1rem;color:var(--muted);letter-spacing:.02em;font-weight:400}
.works-cat .lead{color:var(--muted);font-size:.92rem;margin:18px 0 24px}
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.work-item{background:var(--bg);padding:20px 20px;font-size:.9rem;font-weight:500;color:var(--ink);transition:background .2s}
.work-item:hover{background:var(--bg-soft)}

/* ---------- Members ---------- */
.member{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:start;border-top:1px solid var(--line);padding:48px 0}
.member:last-of-type{border-bottom:1px solid var(--line)}
.member .photo{position:relative;aspect-ratio:3/4;border-radius:12px;background:#111;border:1px solid var(--line);display:flex;align-items:flex-end;padding:26px;color:#fff;overflow:hidden}
.member .photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.08) 0%,rgba(0,0,0,.18) 42%,rgba(0,0,0,.78) 100%)}
.member .photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.04) brightness(.88)}
.member .photo > div{position:relative;z-index:1}
.member .photo .role{font-family:var(--serif);font-style:italic;font-size:.82rem;color:rgba(255,255,255,.72)}
.member .photo .name-ja{font-size:1.5rem;font-weight:700;line-height:1.3;color:#fff}
.member .photo .name-en{font-size:.82rem;color:rgba(255,255,255,.68)}
.member h4{color:var(--ink);font-size:1rem;margin:24px 0 10px;padding-bottom:8px;border-bottom:1px solid var(--line);font-weight:700}
.member ul{list-style:none;display:flex;flex-direction:column;gap:7px}
.member ul li{color:var(--muted);font-size:.92rem;padding-left:20px;position:relative}
.member ul li::before{content:"—";position:absolute;left:0;color:var(--ink)}

/* ---------- Company table ---------- */
.company-table{width:100%;border-collapse:collapse;border-top:1px solid var(--line)}
.company-table th,.company-table td{text-align:left;padding:22px 8px;border-bottom:1px solid var(--line);font-size:.95rem;vertical-align:top}
.company-table th{width:220px;color:var(--ink);font-weight:700}
.company-table td{color:var(--muted)}
.map-embed{width:100%;aspect-ratio:16/9;min-height:320px;border:1px solid var(--line);background:var(--bg-soft);overflow:hidden}
.map-embed iframe{width:100%;height:100%;border:0;display:block;filter:grayscale(1) contrast(.95)}

/* ---------- Contact form ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.form-grid .full{grid-column:1/-1}
.field label{display:block;font-weight:600;font-size:.84rem;color:var(--ink);margin-bottom:10px}
.field label .req{font-family:var(--serif);font-style:italic;color:var(--muted);font-size:.78rem;margin-left:8px}
.field input,.field textarea,.field select{width:100%;padding:14px 0;border:none;border-bottom:1px solid var(--line);border-radius:0;font-family:inherit;font-size:.95rem;background:transparent;transition:border-color .2s}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-bottom-color:var(--ink)}
.field textarea{min-height:130px;resize:vertical}
.contact-notice{margin-bottom:28px;padding:18px 22px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:.86rem;line-height:1.8}
.smoothcontact-embed{width:100%;background:#fff;border:1px solid var(--line);overflow:hidden}
.smoothcontact-embed iframe{display:block;width:100%;height:2500px;border:0;background:transparent}

/* ---------- CTA（モノトーンのダークブロック） ---------- */
.cta{background:var(--ink);color:#fff;border-radius:20px;padding:84px 32px;text-align:center}
.cta h2{font-size:clamp(1.6rem,3vw,2.3rem);font-weight:700;letter-spacing:.02em}
.cta p{margin:18px auto 34px;max-width:540px;color:rgba(255,255,255,.7)}
.cta .btn{background:#fff;color:var(--ink)}
.cta .btn:hover{opacity:.85}

/* ---------- Footer（ライト） ---------- */
footer{background:var(--bg-soft);color:var(--muted);padding:72px 0 34px;border-top:1px solid var(--line)}
.foot-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--line)}
.foot-top .logo-img{height:30px}
.foot-links{display:flex;gap:56px;flex-wrap:wrap}
.foot-links a{display:block;font-size:.88rem;margin-bottom:12px;color:var(--muted)}
.foot-links a:hover{color:var(--ink)}
.foot-links strong{color:var(--ink);display:block;margin-bottom:16px;font-size:.74rem;letter-spacing:.12em;font-weight:700}
.copy{padding-top:26px;font-size:.78rem;text-align:center;color:var(--muted)}

/* ---------- Home alternative（details.co.jp 参考：明るい編集レイアウト） ---------- */
.alt-home{background:#111;color:var(--ink)}
.alt-home header{background:#111;border-bottom:1px solid rgba(255,255,255,.12)}
.alt-home section{padding:0}
.alt-parallax-bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:#101010}
.alt-parallax-bg video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05)}
.alt-human-overlay{position:absolute;inset:0;background:url('/assets/img/hero-hands-overlay-260629.png') right bottom / cover no-repeat;mix-blend-mode:screen;opacity:.54;filter:grayscale(1) contrast(1.12) brightness(.74);transform:scale(1.04);transform-origin:right bottom}
.alt-human-overlay::after{content:"";position:absolute;inset:0;background:
  linear-gradient(90deg, rgba(0,0,0,.92) 0%, rgba(0,0,0,.56) 34%, rgba(0,0,0,.08) 72%, rgba(0,0,0,0) 100%),
  linear-gradient(180deg, rgba(0,0,0,.34) 0%, rgba(0,0,0,0) 46%, rgba(0,0,0,.52) 100%)}
.alt-parallax-scrim{position:absolute;inset:0;background:
  radial-gradient(100% 75% at 58% 38%, rgba(255,255,255,.08) 0%, rgba(0,0,0,.08) 42%, rgba(0,0,0,.62) 100%),
  linear-gradient(180deg, rgba(0,0,0,.52) 0%, rgba(0,0,0,.24) 44%, rgba(0,0,0,.86) 100%)}
.alt-page-content{position:relative;z-index:1;background:#fff}
.alt-hero{min-height:100vh;display:flex;align-items:flex-end;color:#fff}
.alt-hero .wrap{width:100%;max-width:1600px;padding-top:108px;padding-bottom:62px}
.alt-hero-kicker{display:flex;justify-content:space-between;gap:20px;font-family:var(--serif);font-style:italic;font-size:.9rem;color:rgba(255,255,255,.72);margin-bottom:58px}
.alt-hero-kicker span:last-child{text-align:right;min-width:0}
.alt-hero h1{font-size:clamp(3rem,7vw,6.8rem);line-height:1.08;font-weight:700;letter-spacing:0;color:#fff;max-width:1500px;text-shadow:0 8px 58px rgba(0,0,0,.4)}
.alt-hero-bottom{display:grid;grid-template-columns:minmax(0,560px) 1fr;gap:40px;align-items:end;margin-top:70px}
.alt-hero-bottom p{font-size:1.02rem;color:rgba(255,255,255,.82);line-height:2;text-shadow:0 2px 22px rgba(0,0,0,.42)}
.alt-hero-links{display:flex;justify-content:flex-end;gap:28px;flex-wrap:wrap}
.alt-hero-links a,.alt-more a,.alt-contact-link{font-family:var(--serif);font-style:italic;border-bottom:1px solid currentColor;color:var(--ink);line-height:1.5}
.alt-hero-links a{color:#fff;text-shadow:0 2px 18px rgba(0,0,0,.5)}
.alt-statement{position:relative;min-height:760px;display:flex;align-items:flex-end;overflow:hidden;color:#fff;border-bottom:1px solid var(--line);background:#111}
.alt-statement::after{content:"";position:absolute;inset:0;z-index:0;background:
  linear-gradient(90deg, rgba(0,0,0,.74) 0%, rgba(0,0,0,.50) 44%, rgba(0,0,0,.20) 100%),
  linear-gradient(180deg, rgba(0,0,0,.20) 0%, rgba(0,0,0,.62) 100%)}
.alt-statement-bg{position:absolute;inset:0;z-index:0;background:url('/assets/img/approach-people-260629.png') center center / cover no-repeat;filter:brightness(.74) saturate(.9)}
.alt-statement-inner{position:relative;z-index:1;width:100%;padding-top:120px;padding-bottom:118px}
.alt-statement-text{max-width:680px}
.alt-media{aspect-ratio:16/9;background:#111;overflow:hidden}
.alt-media video{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.04)}
.alt-media img{width:100%;height:100%;object-fit:cover}
.alt-statement-text h2,.alt-section-head h2,.alt-contact h2{font-size:clamp(1.8rem,3.6vw,3.4rem);line-height:1.34;font-weight:700;letter-spacing:0;color:var(--ink)}
.alt-statement-text h2{color:#fff;font-size:clamp(1.85rem,3.2vw,3.25rem);line-height:1.32;text-shadow:0 8px 44px rgba(0,0,0,.38)}
.alt-statement-text .eyebrow{color:rgba(255,255,255,.75)}
.alt-statement-text p:not(.eyebrow){margin-top:30px;color:rgba(255,255,255,.78);line-height:2;max-width:680px;text-shadow:0 4px 22px rgba(0,0,0,.35)}
.alt-index,.alt-works,.alt-members{border-bottom:1px solid var(--line)}
.alt-index .wrap,.alt-works .wrap,.alt-members .wrap,.alt-contact .wrap{padding-top:112px;padding-bottom:112px}
.alt-index .wrap{padding-bottom:72px}
.alt-section-head{display:block;max-width:1120px;margin-bottom:62px}
.alt-section-head h2{font-size:clamp(2rem,3.5vw,3rem);line-height:1.36;max-width:1120px}
.alt-section-head .eyebrow{margin-bottom:22px}
.alt-service-list{border-top:1px solid var(--ink)}
.alt-service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.alt-service-card{display:flex;flex-direction:column;background:#fff;min-height:520px;transition:background .2s}
.alt-service-card:hover{background:var(--bg-soft)}
.alt-service-card img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:saturate(.92);transition:filter .2s,transform .3s}
.alt-service-card:hover img{filter:saturate(1);transform:scale(1.015)}
.alt-service-card .alt-row-no{display:block;margin:28px 28px 18px}
.alt-service-card h3{font-size:1.34rem;line-height:1.45;color:var(--ink);font-weight:700;margin:0 28px 14px}
.alt-service-card p{color:var(--muted);line-height:1.85;font-size:.92rem;margin:0 28px 30px}
.alt-service-showcase{display:grid;grid-template-columns:repeat(2,1fr);gap:4px;background:var(--ink);border-top:4px solid var(--ink);border-bottom:4px solid var(--ink)}
.alt-service-panel{position:relative;min-height:52vw;max-height:720px;overflow:hidden;background:#111;display:block}
.alt-service-panel img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.78) saturate(.9);transition:transform .5s,filter .25s}
.alt-service-panel::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg, rgba(0,0,0,0) 35%, rgba(0,0,0,.46) 100%)}
.alt-service-panel:hover img{transform:scale(1.035);filter:brightness(.82) saturate(.96)}
.alt-service-info{position:absolute;right:48px;bottom:46px;z-index:1;width:min(420px,calc(100% - 96px));background:rgba(18,18,18,.94);color:#fff;padding:34px 34px 30px}
.alt-service-info span{display:block;font-family:var(--serif);font-style:italic;color:rgba(255,255,255,.55);font-size:.86rem;margin-bottom:20px}
.alt-service-info h3{color:#fff;font-size:1.45rem;line-height:1.45;font-weight:700;margin:0}
.alt-service-info p{color:rgba(255,255,255,.68);font-size:.92rem;line-height:1.9;margin-top:20px}
.alt-row{display:grid;grid-template-columns:90px minmax(220px,.8fr) 1fr;gap:32px;align-items:center;padding:34px 0;border-bottom:1px solid var(--line);transition:background .2s,padding .2s}
.alt-row:hover{background:var(--bg-soft);padding-left:18px;padding-right:18px}
.alt-row-no{font-family:var(--serif);font-style:italic;color:var(--muted)}
.alt-row-title{font-size:1.35rem;font-weight:700;color:var(--ink)}
.alt-row-desc{color:var(--muted);line-height:1.8}
.alt-work-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--line)}
.alt-work,.alt-person{display:block;border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:34px 30px;min-height:270px;transition:background .2s}
.alt-work:hover,.alt-person:hover{background:var(--bg-soft)}
.alt-work span,.alt-person span{display:block;font-family:var(--serif);font-style:italic;color:var(--muted);margin-bottom:44px}
.alt-work strong,.alt-person strong{display:block;font-size:1.2rem;line-height:1.55;color:var(--ink);font-weight:700}
.alt-work p,.alt-person p{margin-top:18px;color:var(--muted);font-size:.92rem;line-height:1.9}
.alt-more{display:flex;justify-content:flex-end;margin-top:34px}
.alt-people{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--line)}
.alt-person{position:relative;min-height:260px;overflow:hidden}
.alt-person::before{content:"";position:absolute;inset:0;background:center / cover no-repeat;opacity:.18;filter:grayscale(1) brightness(.62) contrast(1.05);transition:opacity .25s,transform .45s;transform:scale(1.02)}
.alt-person::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.99) 0%,rgba(255,255,255,.90) 48%,rgba(255,255,255,.40) 100%);opacity:1;transition:opacity .25s}
.alt-person-murayama::before{background-image:url('/assets/img/member-murayama.jpg')}
.alt-person-seike::before{background-image:url('/assets/img/member-seike.png')}
.alt-person:hover::before{opacity:.50;transform:scale(1.08)}
.alt-person:hover::after{opacity:1}
.alt-person span,.alt-person strong,.alt-person p{position:relative;z-index:1}
/* ---------- Hero 3D（Spline・260715動画差替） ---------- */
.alt-parallax-bg-spline{background:
  radial-gradient(110% 90% at 78% 12%, #1d2030 0%, transparent 55%),
  radial-gradient(90% 80% at 12% 88%, #17131c 0%, transparent 60%),
  #0b0b0d}
.alt-hero-spline .wrap{padding-bottom:0}
.alt-hero-cols{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:24px;align-items:end}
.alt-hero-copy{padding-bottom:72px}
.alt-hero-copy h1{font-size:clamp(2.6rem,4.6vw,4.6rem);line-height:1.16;font-weight:700;color:#fff;text-shadow:0 8px 58px rgba(0,0,0,.4)}
.alt-hero-copy p{margin-top:30px;font-size:1.02rem;color:rgba(255,255,255,.82);line-height:2;max-width:520px;text-shadow:0 2px 22px rgba(0,0,0,.42)}
.alt-hero-copy .alt-hero-links{justify-content:flex-start;margin-top:36px}
.alt-hero-3d{position:relative;height:min(72vh,680px);min-height:440px}
.alt-hero-3d spline-viewer{position:absolute;inset:0;width:100%;height:100%;display:block}
@media(max-width:900px){
  .alt-hero-cols{grid-template-columns:1fr;gap:0;align-items:start}
  .alt-hero-copy{padding-bottom:52px}
  .alt-hero-3d{display:none}
  .alt-hero-spline .wrap{padding-bottom:52px}
}
@media (prefers-reduced-motion: reduce){
  .alt-hero-3d{display:none}
}

/* ---------- Our Product（askHI） ---------- */
.alt-product{border-bottom:1px solid var(--line)}
.alt-product .wrap{padding-top:112px;padding-bottom:112px}
.alt-product-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,460px);gap:clamp(40px,6vw,96px);align-items:center}
.alt-product-copy .eyebrow{margin-bottom:22px}
.alt-product-copy h2{font-size:clamp(1.9rem,3.4vw,2.9rem);line-height:1.36;font-weight:700;color:var(--ink)}
.alt-product-app{display:flex;align-items:center;gap:16px;margin:34px 0 20px}
.alt-product-app img{width:58px;height:58px;border-radius:14px;border:1px solid var(--line)}
.alt-product-app .name{font-size:1.35rem;font-weight:700;color:var(--ink);line-height:1.3}
.alt-product-app .name .hi{color:#FF6B2C}
.alt-product-app .name .dot{color:#3D6BFF}
.alt-product-app .tag{font-family:var(--serif);font-style:italic;font-size:.88rem;color:var(--muted)}
.alt-product-copy > p{color:var(--muted);line-height:2;max-width:520px}
.alt-product-links{display:flex;gap:26px;align-items:center;flex-wrap:wrap;margin-top:32px}
.alt-product-links .more{font-family:var(--serif);font-style:italic;border-bottom:1px solid currentColor;color:var(--ink);line-height:1.5}
.alt-product-visual{position:relative;overflow:hidden;border-radius:18px;background:#101018;padding:clamp(28px,3.5vw,48px) clamp(28px,3.5vw,48px) 0;display:flex;justify-content:center}
.alt-product-visual::before{content:"";position:absolute;inset:0;background:
  radial-gradient(90% 110% at 85% 8%, rgba(61,107,255,.36) 0%, transparent 55%),
  radial-gradient(80% 100% at 10% 95%, rgba(255,107,44,.32) 0%, transparent 55%)}
.alt-product-visual img{position:relative;width:min(260px,72%);border-radius:22px 22px 0 0;border:1px solid rgba(255,255,255,.16);border-bottom:none;box-shadow:0 24px 60px rgba(0,0,0,.45)}
@media(max-width:900px){
  .alt-product .wrap{padding-top:82px;padding-bottom:82px}
  .alt-product-grid{grid-template-columns:1fr;gap:44px}
  .alt-product-visual{padding:34px 34px 0}
}
.alt-contact{background:var(--ink);color:#fff}
.alt-contact .wrap{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:22px 48px;align-items:end}
.alt-contact .eyebrow{grid-column:1/-1;color:rgba(255,255,255,.7);margin:0}
.alt-contact h2{grid-column:1;color:#fff;font-size:clamp(1.9rem,3vw,2.7rem);line-height:1.36;max-width:940px}
.alt-contact-link{grid-column:2;grid-row:2;color:#fff;white-space:nowrap}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .menu{position:fixed;inset:80px 0 auto 0;background:#fff;flex-direction:column;gap:0;padding:8px 0;border-bottom:1px solid var(--line);opacity:0;visibility:hidden;transform:translateY(-12px);transition:opacity .25s,transform .25s,visibility .25s}
  .menu.open{opacity:1;visibility:visible;transform:translateY(0)}
  .menu a{padding:15px 32px;width:100%;color:var(--ink)}
  .menu a:not(.btn):hover,.menu a.is-active:not(.btn){color:var(--muted)}
  .menu a.btn{margin:10px 32px;width:auto;text-align:center;justify-content:center;background:var(--ink);color:#fff}
  .menu a.btn:hover{color:#fff;opacity:.86}
  .nav-toggle{display:flex}
  .alt-home .menu{top:80px;background:rgba(255,255,255,.96)}
  .alt-home .menu a{color:var(--ink);text-shadow:none}
  .alt-home .menu a.btn{background:var(--ink);color:#fff}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-media{aspect-ratio:16/10;max-width:560px}
  .grid-2,.grid-3,.stats,.works-grid{grid-template-columns:1fr 1fr}
  .works-cat h3{grid-template-columns:1fr;gap:8px;font-size:1.3rem}
  .why-grid{grid-template-columns:1fr;gap:44px}
  .steps{grid-template-columns:1fr 1fr;gap:24px 0}
  .member{grid-template-columns:1fr;gap:28px}
  .member .photo{aspect-ratio:16/9}
  .form-grid{grid-template-columns:1fr}
  .alt-hero{min-height:auto}
  .alt-hero .wrap{padding-top:78px;padding-bottom:52px}
  .alt-hero-kicker,.alt-hero-bottom,.alt-section-head,.alt-contact .wrap{grid-template-columns:1fr;display:grid}
  .alt-hero-kicker{gap:8px;margin-bottom:40px}
  .alt-hero-kicker span:last-child{text-align:left}
  .alt-hero-bottom{margin-top:48px}
  .alt-hero-links{justify-content:flex-start}
  .alt-statement{min-height:680px}
  .alt-statement::after{background:
    linear-gradient(180deg, rgba(0,0,0,.30) 0%, rgba(0,0,0,.76) 100%),
    linear-gradient(90deg, rgba(0,0,0,.62) 0%, rgba(0,0,0,.28) 100%)}
  .alt-statement-bg{background-position:48% center}
  .alt-statement-inner{padding-top:84px;padding-bottom:82px}
  .alt-index .wrap,.alt-works .wrap,.alt-members .wrap,.alt-contact .wrap{padding-top:82px;padding-bottom:82px}
  .alt-index .wrap{padding-bottom:48px}
  .alt-section-head{gap:16px;margin-bottom:42px}
  .alt-row{grid-template-columns:54px 1fr;gap:18px;padding:28px 0}
  .alt-row-desc{grid-column:2}
  .alt-service-grid{grid-template-columns:repeat(2,1fr)}
  .alt-service-showcase{grid-template-columns:1fr}
  .alt-service-panel{min-height:620px;max-height:none}
  .alt-service-card{min-height:0}
  .alt-work-grid{grid-template-columns:1fr}
  .alt-people{grid-template-columns:1fr}
  .alt-contact .wrap{gap:24px;align-items:start}
  .alt-contact .eyebrow,.alt-contact h2,.alt-contact-link{grid-column:1;grid-row:auto}
  section{padding:84px 0}
}
@media(max-width:560px){
  .wrap{padding:0 22px}
  .grid-2,.grid-3,.stats,.works-grid,.steps{grid-template-columns:1fr}
  .stat{border-left:none;border-top:1px solid var(--line)}
  .stat:first-child{border-top:none}
  .page-hero{min-height:470px}
  .page-hero .wrap{padding:84px 22px 64px}
  .alt-hero h1{font-size:clamp(2.55rem,15vw,4rem)}
  .alt-row{grid-template-columns:1fr}
  .alt-row-desc{grid-column:auto}
  .alt-service-grid{grid-template-columns:1fr}
  .alt-service-panel{min-height:540px}
  .alt-service-info{left:22px;right:22px;bottom:22px;width:auto;padding:26px 24px 24px}
  .alt-service-info h3{font-size:1.22rem}
  .alt-service-card .alt-row-no{margin:24px 22px 14px}
  .alt-service-card h3{margin:0 22px 10px}
  .alt-service-card p{margin:0 22px 26px}
  .alt-work,.alt-person{padding:28px 22px;min-height:auto}
}