/* ============================================================
   OtO — LP styles ／ 白黒フラット・直立・コンパクト・余白重視
   見出し=英語ロワーケース(Helvetica) / 日本語=小さく軽いリード
   ロゴ=実PNG（白面=黒のまま / 黒面=invertで白）
   ============================================================ */
:root{
  --bg:#ffffff;
  --ink:#0a0a0a;
  --ink2:#7a7a74;
  --line:#e6e5e0;
  --accent:#ec3b22;
  --pad:clamp(16px,3.2vw,40px);
  --maxw:1760px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden;width:100%;background:#000}
body{background:var(--bg);color:var(--ink);font-family:"Helvetica Neue",Helvetica,Arial,"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;-webkit-font-smoothing:antialiased;line-height:1.5;overflow-x:hidden;width:100%;max-width:100%;font-feature-settings:"palt" 1}
.mono{font-family:"SFMono-Regular",ui-monospace,"Roboto Mono",monospace;letter-spacing:.04em}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.num{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink2)}
.jp{font-weight:400;line-height:1.7;color:#333}

/* ===== イントロ ===== */
#intro{position:fixed;inset:0;z-index:100;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden}
#intro.done{opacity:0;visibility:hidden;transition:opacity .55s ease,visibility 0s .55s}
.flashstage{position:relative;width:min(50vw,460px);aspect-ratio:1/1}
.flash{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;font-weight:800;font-size:clamp(36px,10vw,120px);letter-spacing:-.02em}
.flash.show{opacity:1}
.flash img{width:100%;height:100%;object-fit:cover}
.intro-skip{position:absolute;right:var(--pad);bottom:var(--pad);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink2);cursor:pointer;border:1px solid var(--line);padding:8px 14px;border-radius:999px;background:#fff}
.intro-cap{position:absolute;left:var(--pad);bottom:var(--pad);font-size:12px;letter-spacing:.1em;color:var(--ink2)}

/* ===== ファースト・フォールド＝1画面 ===== */
.fold{display:block;position:relative}
.topline{height:4px;background:var(--accent)}

/* ===== マストヘッド ===== */
.masthead{background:#fff;padding:clamp(14px,2vh,26px) var(--pad) clamp(24px,3.6vh,52px);display:flex;align-items:flex-start}
.mh-brand{margin-top:0;margin-right:clamp(12px,2.4vw,52px)}
.mh-grid{width:100%;display:flex;flex-wrap:wrap;align-items:flex-start;gap:clamp(26px,3.4vw,72px);max-width:var(--maxw);margin:0 auto}
.mh-gfx{margin-left:auto;align-self:flex-start;color:var(--ink)}
.mh-gfx img.oto-big{width:clamp(220px,30vw,560px);height:auto;display:block}
.mh-col h3{font-size:clamp(16px,1.4vw,24px);font-weight:700;letter-spacing:-.02em;line-height:1.02;margin-bottom:11px;text-transform:lowercase}
.mh-col .metaline{font-size:12.5px;color:var(--ink);margin-top:clamp(10px,1.4vw,18px)}
.mh-brand .brand-word{display:inline-block;font-weight:700;font-size:clamp(40px,4.6vw,82px);letter-spacing:-.03em;line-height:.9;color:var(--ink)}
.mh-brand .brand-mark{display:inline-block;line-height:0;color:var(--ink)}
.mh-brand .brand-mark svg{height:clamp(24px,2.8vw,42px);width:auto;display:block}
.lang-toggle{display:flex;align-items:center;gap:7px;margin-top:14px;font-size:12px;letter-spacing:.06em}
.lang-toggle button{background:none;border:0;padding:1px 2px;font:inherit;letter-spacing:inherit;color:var(--ink2);cursor:pointer}
.lang-toggle button.on{color:var(--ink);font-weight:700}
.lang-toggle button:hover{color:var(--accent)}
.lang-toggle span{color:var(--line)}
.mh-col a.lk{display:block;width:fit-content;font-size:13px;line-height:1.7;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.mh-col a.lk:hover{color:var(--accent)}
.mh-ico{display:flex;gap:9px;margin-top:14px;align-items:center;color:var(--ink);min-height:26px}
.mh-ico svg{width:30px;height:26px}
.mh-ico svg.fly{position:absolute;top:0;left:0;z-index:30;will-change:transform;pointer-events:none}
.mh-logo{justify-self:end;align-self:start}
.mh-logo .logo-img{height:clamp(52px,5.6vw,92px);width:auto}

/* ===== セカンダリ・ナビ ===== */
.subnav{min-height:clamp(10px,1.6vh,24px);padding:6px var(--pad);background:#fff}
.subnav a:hover{color:var(--accent)}
.subnav a.active{font-weight:700}

/* ===== ページ最上部：大きいOtOロゴ（白地→黒のまま・横幅ギリギリ） ===== */
.top-logo{flex:0 0 auto;background:#fff;display:flex;justify-content:center;align-items:flex-end;padding:clamp(10px,1.8vh,22px) var(--pad) clamp(4px,1vh,12px)}
.top-logo .logo-img{width:auto;max-width:96%;max-height:22vh;height:auto}

/* ===== 黒スプリットHERO ===== */
.split{margin-top:clamp(28px,5.5vh,84px);min-height:clamp(330px,46vh,560px);display:grid;grid-template-columns:1fr 1fr;color:#fff;background-color:#000;background-image:linear-gradient(rgba(0,0,0,.42),rgba(0,0,0,.42)),url(right-bg.png);background-size:cover;background-position:center;background-repeat:no-repeat}
.split>div{position:relative;padding:clamp(20px,2.6vw,44px);display:flex;flex-direction:column}
.split .left{align-items:center;text-align:center}
.split .right{border-left:1px solid rgba(255,255,255,.14);align-items:center;text-align:center}
.split-h{font-size:clamp(20px,4.1vw,64px);font-weight:700;line-height:1;letter-spacing:-.03em;white-space:nowrap}
.split-h .red{color:var(--accent)}
.split-graphic{margin:auto;width:min(56%,224px);color:#fff}
.split-graphic svg{width:100%;height:auto}
.split-graphic .cap{margin-top:10px;font-size:11px;letter-spacing:.12em;color:#bbb;text-align:center}
.feat-title{font-size:clamp(22px,3.7vw,56px);font-weight:700;line-height:1;letter-spacing:-.03em}
.feat-price{font-weight:700;font-size:13px;margin-top:7px;letter-spacing:.02em}
.feat-graphic{flex:1;display:flex;align-items:center;justify-content:center;min-height:0;margin-top:6px;color:#fff}
.feat-graphic svg{width:min(50%,176px);height:auto}
.pill{align-self:center;margin-top:16px;border:1px solid #fff;border-radius:999px;padding:8px 18px;font-size:13px;background:transparent;color:#fff;cursor:pointer;transition:.18s}
.pill:hover{background:#fff;color:#000}

/* ===== ティッカー ===== */
.ticker{border-bottom:1px solid var(--line);overflow:hidden;white-space:nowrap;background:#fff}
.ticker .run{display:inline-block;padding:10px 0;animation:run 30s linear infinite;font-weight:700;font-size:13px;letter-spacing:.04em}
.ticker .run span{margin:0 22px;color:var(--ink)}
.ticker .run .x{color:var(--accent)}
@keyframes run{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ===== セクション共通 ===== */
main{display:block}
section{padding:clamp(40px,5.4vw,82px) 0}
.sechead{display:grid;grid-template-columns:1fr 1fr;gap:clamp(16px,3vw,48px);align-items:end;padding-bottom:14px;margin-bottom:clamp(20px,2.6vw,38px);border-bottom:1px solid var(--line)}
.sechead .hl{display:flex;flex-direction:column;gap:7px}
.sechead h2{font-weight:700;font-size:clamp(26px,3.6vw,52px);line-height:.98;letter-spacing:-.03em;text-transform:lowercase}
.lead{font-size:clamp(13px,1.05vw,15px);max-width:46ch;color:#444;font-weight:400;line-height:1.7;word-break:auto-phrase;overflow-wrap:anywhere;line-break:strict}
.jp,.artist p,.face p,.drop .jp{word-break:auto-phrase;overflow-wrap:anywhere;line-break:strict}
@media(max-width:760px){.sechead{grid-template-columns:1fr}}

/* feature（KV下：グラフィック / 写真） */
.feature{display:grid;grid-template-columns:1fr 1.25fr;gap:clamp(20px,3vw,56px);align-items:center}
.feature.flip{grid-template-columns:1.25fr 1fr}
.feature.flip .ftxt{order:2}
.feature .ftxt h2{font-weight:700;font-size:clamp(26px,3.4vw,48px);line-height:.98;letter-spacing:-.03em;text-transform:lowercase}
.feature .ftxt .jp{margin-top:14px;font-size:14px;max-width:40ch}
.feature .ftxt .tags{margin-top:18px;display:flex;gap:8px;flex-wrap:wrap}
.feature .ftxt .tags span{font-size:11px;border-radius:999px;padding:6px 13px;background:var(--accent);color:#0a0a0a;font-weight:600}
.fvis{aspect-ratio:16/10;border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.fvis.graphic{background:#000;color:#fff}
.fvis.graphic svg{width:80%;height:auto}
.fvis.graphic.shot{padding:clamp(14px,2vw,26px)}
.fvis.graphic.shot img{width:100%;height:100%;object-fit:contain;display:block;border-radius:8px}
.sound-vis{margin-top:clamp(16px,2.4vw,30px);background:#000;border-radius:12px;padding:clamp(28px,5vw,64px);display:flex;align-items:center;justify-content:center}
.sound-vis svg{width:min(78%,560px);height:auto}
.sv-cap{margin:clamp(16px,2.2vw,26px) 0 0;text-align:center;font-size:clamp(17px,2vw,26px);letter-spacing:.01em;line-height:1.4;color:var(--ink);font-weight:500}
.fvis.photo{padding:clamp(12px,1.6vw,22px);background:#fff;border:1px solid var(--line)}
.photogrid{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:1fr 1fr;gap:8px;width:100%;height:100%}
.photogrid .cell{position:relative;background:#f0efea;border:1px solid var(--line);border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.photogrid .cell img{width:100%;height:100%;object-fit:cover}
.photogrid .cell b{font-size:clamp(16px,1.8vw,26px);font-weight:700;color:#d6d4cd}
@media(max-width:760px){.feature,.feature.flip{grid-template-columns:1fr}.feature.flip .ftxt{order:0}}

/* 整音/生音 */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:clamp(12px,1.6vw,22px)}
.face{border:1px solid var(--line);border-radius:12px;padding:clamp(22px,3vw,40px);background:#fff}
.face.raw{background:#000;color:#e7e8f4;border-color:#000}
.face .nm{font-weight:700;font-size:clamp(26px,3vw,44px);letter-spacing:-.02em}
.face .en{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink2)}
.face.raw .en{color:#888}
.face p{margin-top:13px;font-size:13.5px;line-height:1.7;color:#444}
.face.raw p{color:#cfcfcf}
@media(max-width:760px){.duo{grid-template-columns:1fr}}

/* 99letters */
.artist{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(22px,3.4vw,52px);align-items:start}
.artist .ph{aspect-ratio:1/1;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;color:#666}
.artist .ph img{width:100%;height:100%;object-fit:cover;display:block}
.artist h3{font-weight:700;font-size:clamp(22px,2.4vw,34px);line-height:1.1;letter-spacing:-.02em}
.artist .alinks{display:flex;gap:18px;flex-wrap:wrap;margin-top:18px}
.artist .alinks a{font-size:13px;font-weight:700;letter-spacing:.02em;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;color:var(--ink)}
.artist .alinks a:hover{color:var(--accent)}
.artist p{margin-top:12px;font-size:14px;line-height:1.75;color:#333;max-width:none;word-break:auto-phrase;overflow-wrap:anywhere;line-break:strict}
.quote{margin-top:18px;font-size:13px;color:var(--ink2);border-left:2px solid var(--accent);padding-left:14px}
@media(max-width:760px){.artist{grid-template-columns:1fr}}

/* drop */
.drop{background:#000;color:#fff;border-radius:16px;padding:clamp(34px,5.4vw,76px) clamp(24px,5vw,72px);text-align:center}
.drop h2{font-weight:700;font-size:clamp(32px,5.4vw,80px);line-height:.94;letter-spacing:-.03em;text-transform:lowercase}
.drop .jp{font-size:14px;margin-top:12px;color:#bbb}
.btn{display:inline-flex;align-items:center;gap:9px;font-size:14px;font-weight:600;padding:12px 24px;border-radius:999px;border:1.5px solid #fff;background:#fff;color:#000;cursor:pointer;transition:.18s;margin-top:24px}
.btn:hover{background:transparent;color:#fff}

/* footer */
footer{background:#000;color:#9a9a9a;padding:42px 0 52px}
.foot{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;font-size:13px}
.foot .fmark{display:flex;align-items:center;gap:14px;color:#fff}
.foot .fmark .fmark-logo svg{height:28px;width:auto;display:block;color:#fff}
.foot a:hover{color:#fff}

/* reveal — 心地よいフェード&立ち上がり */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .75s cubic-bezier(.22,.61,.36,1),transform .75s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}
.rv-item{transform:translateY(12px);transition-duration:.6s}
@media(prefers-reduced-motion:reduce){.reveal,.rv-item{opacity:1!important;transform:none!important;transition:none!important}}

/* responsive */
@media(max-width:760px){
  .fold{height:auto;overflow:visible}
  .masthead{flex:none}
  .mh-grid{gap:20px 22px}
  .mh-brand{flex-basis:100%;margin-right:0}
  .mh-gfx{flex-basis:100%;margin:clamp(6px,1.6vw,14px) 0 0;display:flex;justify-content:flex-end}
  .top-logo{padding:16px var(--pad) 8px}
  .top-logo .logo-img{max-height:none;width:96%}
  .split{flex:none;grid-template-columns:1fr}
  .split>div{min-height:auto;padding-top:clamp(28px,6vh,56px);padding-bottom:clamp(28px,6vh,56px)}
  .split .left{align-items:center;text-align:center}
  .split .right{border-left:0;border-top:1px solid #1c1c1c}
  .split-h{white-space:normal}
  .pill{position:static;align-self:center;margin-top:18px;max-width:100%}
}
@media(max-width:980px) and (min-width:761px){
  .mh-grid{gap:20px 28px}
}

/* ===== about（世界観）ページ ===== */
.ahero{position:relative;overflow:hidden;background:#000;color:#fff;padding:clamp(72px,14vh,168px) var(--pad) clamp(56px,10vh,124px);text-align:center}
.ahero .bgimg{position:absolute;inset:0;z-index:1;background:linear-gradient(rgba(0,0,0,.55),rgba(0,0,0,.72)),url(right-bg.png) center/cover no-repeat;opacity:.55}
.ahero .inner{position:relative;z-index:2;max-width:960px;margin:0 auto}
.ahero .eyebrow{font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
.ahero h1{font-size:clamp(34px,7.4vw,98px);font-weight:700;line-height:.95;letter-spacing:-.035em}
.ahero h1 .red{color:var(--accent)}
.ahero .sub{margin:24px auto 0;max-width:640px;font-size:clamp(13px,1.5vw,16px);line-height:1.95;color:#cfcfca}
.wv-sec{border-top:1px solid var(--line);padding:clamp(34px,5vw,72px) 0}
.wv-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(20px,4vw,72px);align-items:start}
.wv-grid .k .num{display:block;margin-bottom:12px}
.wv-grid .k h2{font-size:clamp(22px,3.5vw,48px);font-weight:700;line-height:1.0;letter-spacing:-.03em}
.wv-grid .v p{font-size:clamp(14px,1.4vw,16px);line-height:1.95;color:#2c2c29;word-break:auto-phrase;overflow-wrap:anywhere;line-break:strict}
.wv-grid .v p+p{margin-top:14px}
.wv-grid .v .em{font-weight:700;color:var(--ink)}
.wv-grid .v .tags{margin-top:16px}
.bigquote{background:#000;color:#fff;text-align:center;padding:clamp(58px,10vw,128px) var(--pad)}
.bigquote .num{color:#7a7a76;margin-bottom:20px}
.bigquote h2{font-size:clamp(30px,6vw,80px);font-weight:700;line-height:.98;letter-spacing:-.035em}
.bigquote h2 .red{color:var(--accent)}
.bigquote .sub{margin:22px auto 0;max-width:620px;font-size:clamp(13px,1.5vw,16px);line-height:1.95;color:#bdbdb8}
.aclose{text-align:center;padding:clamp(46px,7vw,96px) var(--pad)}
.aclose h2{font-size:clamp(24px,4vw,56px);font-weight:700;letter-spacing:-.03em;line-height:1}
.aclose p{margin:14px auto 26px;max-width:520px;color:var(--ink2);font-size:14px;line-height:1.9}
@media(max-width:760px){.wv-grid{grid-template-columns:1fr;gap:12px}}

/* ===== ハンバーガー＋全画面ナビ ===== */
.hamb{position:fixed;top:clamp(10px,1.6vh,20px);right:clamp(12px,3vw,40px);z-index:140;width:46px;height:46px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#fff;border:1px solid var(--line);border-radius:11px;cursor:pointer;box-shadow:0 1px 4px rgba(0,0,0,.07);transition:border-color .2s,background .2s}
.hamb:hover{border-color:var(--ink)}
.hamb span{display:block;width:21px;height:2px;background:var(--ink);transition:transform .26s,opacity .18s,background .2s}
body.nav-open{overflow:hidden}
body.nav-open .hamb{background:transparent;border-color:transparent;box-shadow:none}
body.nav-open .hamb span{background:#fff}
body.nav-open .hamb span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .hamb span:nth-child(2){opacity:0}
body.nav-open .hamb span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.navover{position:fixed;inset:0;z-index:130;background:#0a0a0a;color:#fff;display:flex;flex-direction:column;justify-content:center;padding:clamp(40px,9vw,110px);gap:clamp(2px,1vw,8px);opacity:0;visibility:hidden;transition:opacity .3s ease}
body.nav-open .navover{opacity:1;visibility:visible}
.navover .nav-eyebrow{font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--accent);margin-bottom:clamp(18px,2.6vw,34px)}
.navgroups{display:flex;flex-direction:column;gap:clamp(4px,1.2vw,14px)}
.navgroups .ghead{display:inline-block;width:fit-content;font-size:clamp(32px,7vw,76px);font-weight:700;letter-spacing:-.03em;line-height:1.12;color:#fff;text-decoration:none;text-transform:lowercase;transition:color .15s}
.navgroups .ghead:hover{color:var(--accent)}
.navover .navfoot{margin-top:clamp(22px,4vw,46px);display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.navover .navfoot a{font-size:13px;font-weight:400;letter-spacing:.03em;color:#8a8a86;text-decoration:none;text-transform:none}
.navover .navfoot a:hover{color:#fff}

/* ===== guide（使い方）ページ ===== */
.steps{display:flex;flex-direction:column;gap:clamp(14px,2vw,24px)}
.steps .step{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.35fr);gap:clamp(20px,4vw,56px);align-items:center;border:1px solid var(--line);border-radius:14px;padding:clamp(18px,2.4vw,34px);background:#fff}
.steps .step .txt{display:flex;flex-direction:column}
.steps .step .n{font-size:clamp(34px,4vw,62px);font-weight:700;letter-spacing:-.03em;line-height:1;color:var(--accent)}
.steps .step h3{font-size:clamp(17px,1.7vw,23px);font-weight:700;margin:12px 0 9px;text-transform:lowercase;letter-spacing:-.01em}
.steps .step p{font-size:14px;line-height:1.8;color:#3a3a37;max-width:34ch;word-break:auto-phrase;overflow-wrap:anywhere;line-break:strict}
.steps .step .shot{aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:#0a0a0a;border:1px solid var(--line)}
.steps .step .shot img{width:100%;height:100%;object-fit:cover;display:block}
@media(max-width:760px){.steps .step{grid-template-columns:1fr;gap:14px}.steps .step .shot{order:-1}}
.callout{border:1px solid var(--accent);border-radius:14px;padding:clamp(18px,2.4vw,28px);background:#fff;display:flex;gap:16px;align-items:flex-start}
.callout .big{font-size:24px;line-height:1.1;flex:none}
.callout p{font-size:14px;line-height:1.85;color:#2c2c29;word-break:auto-phrase;overflow-wrap:anywhere;line-break:strict}
.callout .em{font-weight:700;color:var(--accent)}
.rtwrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.rtable{width:100%;border-collapse:collapse;font-size:13.5px;min-width:560px}
.rtable th,.rtable td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.7}
.rtable th{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink2);font-weight:700}
.rtable td:first-child{font-weight:700;white-space:nowrap;color:var(--accent)}
.faq .qa{border-bottom:1px solid var(--line);padding:16px 0}
.faq .q{font-weight:700;font-size:14.5px;margin-bottom:6px}
.faq .a{font-size:13.5px;line-height:1.8;color:#3a3a37;word-break:auto-phrase;overflow-wrap:anywhere;line-break:strict}
.faq .a .em{font-weight:700;color:var(--ink)}
.guide-shot{margin-top:18px;background:#f7f6f3;border:1px solid var(--line);border-radius:10px;padding:clamp(16px,2.6vw,28px);display:flex;align-items:center;justify-content:center}
.guide-shot img{width:min(58%,260px);height:auto;display:block}
.guide-shot.wide img{width:min(94%,580px)}