/* 株式会社T-next ── 共通デザイン（2026-10-28 リニューアル）
   色はロゴから：ライトブルー #2e97d4・ディープブルー #005aa7・グリーン #84b746
   深い紺を土台に、鋼の銀とロゴの青で「精密・清潔・確かな仕事」を表す */
:root{
  /* 基調＝会社の色（ブルー・スカイブルー・ライトブルー） */
  --n9:#0b4f86;--n8:#0f4470;--n7:#155d93;--n6:#1d74b2;
  --blue:#2e97d4;--blue-d:#1574bb;--blue-l:#dff3ff;--green:#84b746;
  --sky:#2e97d4;--sky-d:#1877bd;--sky-l:#8fd0f3;--sky-ll:#e3f3fc;
  --bgsky:linear-gradient(140deg,#2a92d3 0%,#1a7bc0 48%,#1266a8 100%);
  --bgsky2:linear-gradient(160deg,#1a7bc0 0%,#0f5f9e 100%);
  --steel:#c6d6e2;--steel-d:#86a3b8;--paper:#f3faff;--paper2:#e4f3fc;--line:#cfe5f4;
  --ink:#15334a;--muted:#577287;
  --m:'Shippori Mincho B1','Zen Old Mincho','Hiragino Mincho ProN','Yu Mincho',serif;
  --g:'Zen Kaku Gothic New','Hiragino Sans','Hiragino Kaku Gothic ProN',sans-serif;
  --en:'Cormorant Garamond',Georgia,serif;
  --lb:'Barlow Condensed','Arial Narrow',sans-serif;
  --ease:cubic-bezier(.2,.7,.1,1);
  --ease2:cubic-bezier(.77,0,.18,1);
  --gut:clamp(20px,5vw,64px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font:400 16px/1.95 var(--g);color:var(--ink);background:var(--paper);overflow-x:hidden;letter-spacing:.03em;-webkit-font-smoothing:antialiased;font-feature-settings:"palt" 1}
img{max-width:100%;display:block}
a{color:inherit}
button{font-family:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 var(--gut)}
.nb{display:inline-block}
::selection{background:var(--blue);color:#fff}

/* ── 見出しの型 ── */
.lbl{display:inline-flex;align-items:center;gap:.9em;font:500 .8rem/1 var(--lb);letter-spacing:.32em;text-transform:uppercase;color:var(--blue-d)}
.lbl::before{content:"";width:34px;height:1px;background:currentColor;opacity:.7}
.lbl.w{color:var(--blue-l)}
.h2{font:700 clamp(1.7rem,4.4vw,2.9rem)/1.45 var(--m);letter-spacing:.04em;color:var(--n8);margin:.9rem 0 1.4rem}
.h2.w{color:#fff}
.h2 em{font-style:normal;color:var(--blue-d)}
.h2.w em{color:var(--blue-l)}
.en-big{font:500 italic clamp(3.2rem,10vw,8.5rem)/.9 var(--en);letter-spacing:-.01em;color:transparent;-webkit-text-stroke:1px rgba(30,120,190,.18);position:absolute;pointer-events:none;user-select:none;white-space:nowrap}
.en-big.w{-webkit-text-stroke:1px rgba(255,255,255,.2)}
.lead{max-width:40em;color:#3b4852;font-size:1.02rem}
.lead.w{color:rgba(255,255,255,.9)}
section{position:relative}
.sec{padding:clamp(88px,14vh,160px) 0}

/* ── ボタン ── */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:.9em;padding:1.15rem 2rem;font:700 .95rem/1 var(--g);letter-spacing:.08em;text-decoration:none;overflow:hidden;isolation:isolate;transition:color .5s var(--ease),border-color .5s var(--ease),transform .5s var(--ease)}
.btn::after{content:"";position:absolute;inset:0;z-index:-1;transform:scaleX(0);transform-origin:right;transition:transform .6s var(--ease2)}
.btn:hover::after{transform:scaleX(1);transform-origin:left}
.btn .ar{display:inline-block;width:22px;height:1px;background:currentColor;position:relative;transition:width .5s var(--ease)}
.btn .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)}
.btn:hover .ar{width:34px}
.btn-w{background:#fff;color:var(--n8)}.btn-w::after{background:var(--blue-d)}.btn-w:hover{color:#fff}
.btn-o{border:1px solid rgba(255,255,255,.55);color:#fff}.btn-o::after{background:#fff}.btn-o:hover{color:var(--n8)}
.btn-n{background:var(--n8);color:#fff}.btn-n::after{background:var(--blue-d)}
.btn-l{border:1px solid var(--n8);color:var(--n8)}.btn-l::after{background:var(--n8)}.btn-l:hover{color:#fff}

/* ── ヘッダー ── */
.gh{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .5s,box-shadow .5s,transform .5s var(--ease)}
.gh .in{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:1440px;margin:0 auto;padding:18px var(--gut);transition:padding .5s var(--ease)}
.gh.on{background:rgba(22,118,188,.86);-webkit-backdrop-filter:blur(14px) saturate(1.3);backdrop-filter:blur(14px) saturate(1.3);box-shadow:0 1px 0 rgba(255,255,255,.06)}
.gh.on .in{padding-top:11px;padding-bottom:11px}
.gh.hide{transform:translateY(-100%)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff}
.brand .mk{width:42px;height:42px;background:#fff;border-radius:10px;display:grid;place-items:center;flex:none;box-shadow:0 6px 18px -8px rgba(0,0,0,.6)}
.brand .mk img{width:31px}
.brand .tx img{height:19px;width:auto}
.brand .tx small{display:block;font:500 .62rem/1 var(--g);letter-spacing:.18em;color:rgba(255,255,255,.9);margin-top:6px}
.gnav{display:flex;align-items:center;gap:30px}
.gnav a{position:relative;font:500 .86rem/1 var(--g);letter-spacing:.1em;color:rgba(255,255,255,.9);text-decoration:none;padding:.5em 0}
.gnav a:not(.cta)::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--blue-l);transform:scaleX(0);transform-origin:right;transition:transform .5s var(--ease)}
.gnav a:not(.cta):hover::after,.gnav a.cur::after{transform:scaleX(1);transform-origin:left}
.gnav .cta{padding:.85em 1.4em;border:1px solid rgba(255,255,255,.45);transition:background .4s,color .4s}
.gnav .cta:hover{background:#fff;color:var(--n8)}
.gnav .cta.rec{background:var(--blue-d);border-color:var(--blue-d)}
.gnav .cta.rec:hover{background:#fff;color:var(--n8);border-color:#fff}
.burger{display:none;width:48px;height:48px;border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.12);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);cursor:pointer;position:relative;z-index:71}
.burger i{position:absolute;left:14px;right:14px;height:1px;background:#fff;transition:transform .5s var(--ease),top .5s var(--ease),opacity .3s}
.burger i:nth-child(1){top:18px}.burger i:nth-child(2){top:24px}.burger i:nth-child(3){top:30px}
.menu-open .burger i:nth-child(1){top:24px;transform:rotate(45deg)}
.menu-open .burger i:nth-child(2){opacity:0}
.menu-open .burger i:nth-child(3){top:24px;transform:rotate(-45deg)}
.drawer{position:fixed;inset:0;z-index:70;background:var(--bgsky);color:#fff;display:flex;flex-direction:column;justify-content:center;padding:90px var(--gut) 40px;clip-path:inset(0 0 100% 0);transition:clip-path .8s var(--ease2);overflow:auto}
.menu-open .drawer{clip-path:inset(0 0 0 0)}
.drawer::before{content:"";position:absolute;right:-20%;top:10%;width:70vw;height:70vw;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.18),transparent 65%);pointer-events:none}
.drawer a{display:flex;align-items:baseline;gap:16px;text-decoration:none;padding:.9rem 0;border-bottom:1px solid rgba(255,255,255,.08);opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.drawer a small{font:500 .72rem/1 var(--lb);letter-spacing:.28em;color:var(--blue-l);width:6.5em;flex:none}
.drawer a span{font:700 1.35rem/1.4 var(--m);letter-spacing:.06em}
.menu-open .drawer a{opacity:1;transform:none}
.drawer .dtel{margin-top:2rem;font:600 1.6rem/1 var(--lb);letter-spacing:.06em;color:#fff;border:0;opacity:0}
.menu-open .drawer .dtel{opacity:1}
@media(max-width:960px){.gnav{display:none}.burger{display:block}.brand .tx small{display:none}}
@media(prefers-reduced-motion:no-preference){.menu-open .drawer a{transition-delay:calc(.25s + var(--i,0)*.06s)}}

/* 進み具合のバー */
.prog{position:fixed;left:0;top:0;height:2px;width:100%;z-index:80;background:linear-gradient(90deg,var(--blue-d),var(--blue),var(--green));transform:scaleX(var(--p,0));transform-origin:left;pointer-events:none}

/* ── オープニング ── */
.opening{position:fixed;inset:0;z-index:100;background:#fff;display:none;place-items:center}
html.is-open .opening{display:grid}
.opening .om{width:min(170px,40vw)}
.opening .om svg{width:100%;height:auto;overflow:visible}
.opening .o-bar{transform-box:fill-box;transform-origin:left center;transform:scaleX(0);animation:oBar .7s var(--ease2) .1s forwards}
.opening .o-stem{transform-box:fill-box;transform-origin:center bottom;transform:scaleY(0);animation:oStem .6s var(--ease2) .45s forwards}
.opening .o-white{opacity:0;animation:oArch .6s var(--ease) .75s forwards}
.opening .o-arch{opacity:0;transform:translateY(40px);animation:oArch .6s var(--ease) .85s forwards}
.opening .o-tx{display:block;width:78%;margin:28px auto 0;opacity:0;clip-path:inset(0 100% 0 0);animation:oTx .7s var(--ease2) 1s forwards}
.opening .o-line{position:absolute;left:0;bottom:0;height:2px;width:100%;background:linear-gradient(90deg,var(--blue-d),var(--blue),var(--green));transform:scaleX(0);transform-origin:left;animation:oLine 1.6s var(--ease) .1s forwards}
.opening.out{animation:oOut .9s var(--ease2) forwards}
@keyframes oBar{to{transform:scaleX(1)}}
@keyframes oStem{to{transform:scaleY(1)}}
@keyframes oArch{to{opacity:1;transform:none}}
@keyframes oTx{to{opacity:1;clip-path:inset(0 0 0 0)}}
@keyframes oLine{to{transform:scaleX(1)}}
@keyframes oOut{to{clip-path:inset(0 0 100% 0)}}

/* ── スクロールで現れる ── */
.js .rv{opacity:0;transform:translateY(38px);transition:opacity 1.1s var(--ease),transform 1.1s var(--ease);transition-delay:calc(var(--d,0)*.1s)}
.js .rv.l{transform:translateX(-40px)}
.js .rv.r{transform:translateX(40px)}
.js .rv.s{transform:scale(.96)}
.js .rv.in{opacity:1;transform:none}
.js .mask{clip-path:inset(0 0 100% 0);transition:clip-path 1.4s var(--ease2);transition-delay:calc(var(--d,0)*.1s)}
.js .mask.in{clip-path:inset(0 0 0 0)}
.js .mask img{transform:scale(1.18);transition:transform 2.2s var(--ease)}
.js .mask.in img{transform:scale(1)}
.js .ln{display:block;overflow:hidden}
.js .ln>span{display:inline-block;transform:translateY(110%);transition:transform 1.2s var(--ease);transition-delay:calc(var(--d,0)*.12s)}
.js .ln.in>span{transform:none}
/* 下層ページの見出し：オープニングの後に */
.js .phero .hl{display:block;overflow:hidden}
.js .phero .hl>span{display:inline-block;transform:translateY(110%);transition:transform 1.4s var(--ease);transition-delay:calc(.15s + var(--d,0)*.14s)}
.js .ready .phero .hl>span{transform:none}
.js .bar-draw{transform:scaleX(0);transform-origin:left;transition:transform 1.6s var(--ease2)}
.js .bar-draw.in{transform:scaleX(1)}
@media(prefers-reduced-motion:reduce){
  .js .rv,.js .mask,.js .mask img,.js .ln>span,.js .bar-draw{opacity:1!important;transform:none!important;clip-path:none!important;transition:none!important}
  html.is-open .opening{display:none}
  *{animation-duration:.01ms!important;animation-iteration-count:1!important}
}

/* ── 流れる英字 ── */
.marquee{overflow:hidden;white-space:nowrap;padding:26px 0;background:var(--bgsky2);border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.marquee .tr{display:inline-flex;gap:0;animation:mq 46s linear infinite}
.marquee span{font:500 italic clamp(2rem,5vw,3.6rem)/1 var(--en);color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.62);padding-right:.6em;display:inline-flex;align-items:center;gap:.6em}
.marquee span b{font:700 clamp(.8rem,1.6vw,1rem)/1 var(--g);-webkit-text-stroke:0;color:var(--blue-l);letter-spacing:.2em;font-style:normal}
.marquee span::after{content:"";width:.28em;height:.28em;border-radius:50%;background:#fff;display:inline-block}
@keyframes mq{to{transform:translateX(-50%)}}

/* ── 写真の拡大表示 ── */
.lb{position:fixed;inset:0;z-index:90;background:rgba(3,10,16,.94);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .5s var(--ease)}
.lb.open{opacity:1;pointer-events:auto}
.lb figure{max-width:min(92vw,1100px);max-height:86vh;display:flex;flex-direction:column;align-items:center}
.lb img{max-height:78vh;width:auto;object-fit:contain;box-shadow:0 40px 80px -30px #000;transform:scale(.96);transition:transform .6s var(--ease),opacity .3s}
.lb.open img{transform:none}
.lb figcaption{color:rgba(255,255,255,.9);font-size:.9rem;margin-top:14px;letter-spacing:.1em}
.lb figcaption i{font:500 .78rem/1 var(--lb);letter-spacing:.2em;color:var(--blue-l);margin-right:1em;font-style:normal}
.lb button{position:absolute;background:none;border:1px solid rgba(255,255,255,.3);color:#fff;width:52px;height:52px;cursor:pointer;font-size:1.2rem;transition:background .3s}
.lb button:hover{background:rgba(255,255,255,.1)}
.lb .x{top:18px;right:18px}
.lb .pv{left:18px;top:50%;margin-top:-26px}
.lb .nx{right:18px;top:50%;margin-top:-26px}
@media(max-width:700px){.lb .pv,.lb .nx{top:auto;bottom:18px;margin:0}}

/* ── 固定ボタン（スマホ） ── */
.fixbar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:55;grid-template-columns:1fr 1fr;transform:translateY(110%);transition:transform .6s var(--ease)}
.fixbar.on{transform:none}
.fixbar a{display:flex;align-items:center;justify-content:center;gap:.5em;padding:1.05rem .5rem calc(1.05rem + env(safe-area-inset-bottom));font-weight:700;text-decoration:none;font-size:.95rem;letter-spacing:.06em}
.fixbar a:first-child{background:#fff;color:var(--n8);border-top:1px solid var(--line)}
.fixbar a:last-child{background:var(--sky-d);color:#fff}
.fixbar.one{grid-template-columns:1fr}
@media(max-width:960px){.fixbar{display:grid}}

/* ── フッター ── */
.gf{background:var(--bgsky2);color:rgba(255,255,255,.86);padding:clamp(70px,10vh,110px) 0 40px;position:relative;overflow:hidden}
.gf .top{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:end}
.gf .logo-w{display:inline-flex;align-items:center;gap:16px;text-decoration:none}
.gf .logo-w .mk{width:64px;height:64px;background:#fff;border-radius:14px;display:grid;place-items:center}
.gf .logo-w .mk img{width:47px}
.gf .logo-w>img{height:30px;width:auto}
.gf address{font-style:normal;margin-top:1.6rem;line-height:2;font-size:.9rem}
.gf address a{color:#fff;text-decoration:none;font:600 1.5rem/1.6 var(--lb);letter-spacing:.06em}
.gf nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.2rem 2rem}
.gf nav a{text-decoration:none;font-size:.9rem;padding:.55rem 0;border-bottom:1px solid rgba(255,255,255,.07);display:flex;justify-content:space-between;transition:color .3s}
.gf nav a::after{content:"→";opacity:.4}
.gf nav a:hover{color:#fff}
.gf .bot{display:flex;justify-content:space-between;align-items:center;margin-top:60px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);font:500 .76rem/1 var(--lb);letter-spacing:.2em}
.gf .totop{background:none;border:1px solid rgba(255,255,255,.25);color:#fff;width:46px;height:46px;cursor:pointer;transition:background .3s}
.gf .totop:hover{background:rgba(255,255,255,.1)}
.gf .en-big{right:-2%;bottom:40px}
@media(max-width:860px){.gf .top{grid-template-columns:minmax(0,1fr)}.gf{padding-bottom:110px}}

/* ── 下層ページの見出し ── */
.phero{position:relative;min-height:78svh;display:flex;align-items:flex-end;color:#fff;overflow:hidden;background:var(--sky-d)}
.phero .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.62;transform:scale(1.08);animation:kb 14s var(--ease) forwards}
.phero::before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(7,60,106,.38) 0%,rgba(7,60,106,.08) 35%,rgba(7,60,106,.82) 100%),linear-gradient(90deg,rgba(7,60,106,.62),transparent 70%)}
.phero .bg{opacity:.85}
.phero h1{text-shadow:0 4px 30px rgba(4,40,72,.55)}
.phero .in{position:relative;z-index:2;width:100%;max-width:1200px;margin:0 auto;padding:140px var(--gut) clamp(56px,9vh,100px)}
.phero h1{font:700 clamp(1.75rem,6vw,4.2rem)/1.35 var(--m);letter-spacing:.05em;margin:1.2rem 0 1.4rem}
.phero p{max-width:36em;color:rgba(255,255,255,.9)}
.crumb{font:500 .74rem/1 var(--lb);letter-spacing:.24em;color:rgba(255,255,255,.75);margin-top:2rem}
.crumb a{color:#fff;text-decoration:none}
@keyframes kb{to{transform:scale(1)}}
.fixbar.one a{background:var(--blue-d);color:#fff;border-top:0}

.gf .logo-card{display:inline-block;background:#fff;padding:16px 22px;border-radius:14px;box-shadow:0 20px 40px -24px rgba(8,50,90,.6)}
.gf .logo-card img{width:120px;height:auto}

/* ===== 10/28 のっぺり解消（三段階の青・質感・青い写真・浮かぶカード・曲線の境目・緑の差し色・強い英字） ===== */
:root{
  --deep:linear-gradient(155deg,#0e5c99 0%,#0a4677 70%,#083a63 100%);
  --deepc:#0a4677;
  --lightsky:linear-gradient(180deg,#e9f6fe 0%,#d9eefb 100%);
}
/* 章の頭の英字：細い大文字 → 大きな斜体の飾り文字＋緑の印 */
.lbl{font:600 italic clamp(1.5rem,2.8vw,2.15rem)/1.1 var(--en);letter-spacing:.01em;text-transform:none;color:var(--sky);gap:.55em}
.lbl::before{width:26px;height:3px;background:var(--green);opacity:1;border-radius:2px;align-self:center}
.lbl.w{color:#fff}
.hero .lbl{color:#fff}
/* 背景の大きな英字：縁取り → 塗り */
.en-big{-webkit-text-stroke:0;color:rgba(46,151,212,.08);font-weight:600;font-size:clamp(4rem,13vw,11rem)}
.en-big.w{-webkit-text-stroke:0;color:rgba(255,255,255,.09)}
.sec>.wrap,section>.wrap{position:relative;z-index:2}
/* 図面の方眼 */
.tx-grid{position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:200px 200px,200px 200px,40px 40px,40px 40px;-webkit-mask-image:radial-gradient(ellipse at 70% 40%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse at 70% 40%,#000 20%,transparent 75%)}
.tx-grid.dk{background-image:linear-gradient(rgba(21,116,187,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(21,116,187,.08) 1px,transparent 1px),linear-gradient(rgba(21,116,187,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(21,116,187,.035) 1px,transparent 1px)}
/* 金属の光が流れる */
.tx-sheen{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.tx-sheen::after{content:"";position:absolute;top:-30%;bottom:-30%;left:-50%;width:38%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.14) 50%,transparent);transform:skewX(-16deg);animation:sheen 12s ease-in-out infinite}
@keyframes sheen{0%{left:-50%}55%,100%{left:130%}}
/* 配管の線 */
.tx-pipe{position:absolute;z-index:0;pointer-events:none;opacity:.55}
.tx-pipe path{fill:none;stroke:rgba(255,255,255,.22);stroke-width:1.5}
.tx-pipe .j{fill:none;stroke:rgba(255,255,255,.35);stroke-width:1.5}
.js .tx-pipe path{stroke-dasharray:2400;stroke-dashoffset:2400;transition:stroke-dashoffset 3.6s var(--ease)}
.js .tx-pipe.in path{stroke-dashoffset:0}
/* 青く染めた写真 */
.duo{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.duo img{width:100%;height:100%;object-fit:cover;opacity:.3;mix-blend-mode:luminosity}
.duo.soft img{opacity:.2}
.duo.fade{-webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 55%);mask-image:linear-gradient(90deg,transparent 0%,#000 55%)}
/* 曲線・斜めの境目（となりの章の色で塗る） */
.wv{position:absolute;left:0;right:0;height:clamp(36px,5.5vw,96px);z-index:1;pointer-events:none;line-height:0}
.wv svg{width:100%;height:100%;display:block}
.wv.t{top:-1px}.wv.b{bottom:-1px}
/* 緑の差し色 */
.btn .ar::after{border-color:currentColor}
.btn:hover .ar{background:var(--green)}
.gf{background:var(--deep)}
.gf nav a:hover::after{color:var(--green);opacity:1}
.prog{background:linear-gradient(90deg,var(--sky),var(--green))}
/* 動きを減らす設定 */
@media(prefers-reduced-motion:reduce){.tx-sheen::after{animation:none;display:none}.js .tx-pipe path{stroke-dashoffset:0}}