/* ============================================================
   京大個別会2026 — Luminous Kyoto Heritage (Blueprint Preview)
   THE KYOTO PALETTE 2026 : 瑠璃色 / ブライト・バーミリオン / シャンパンゴールド
   明るく透明感のある上質トーン ／ 麻の葉・格子・5モチーフ
   ============================================================ */
:root{
  --ruri:#005bac; --ruri-deep:#0a3d70; --ruri-mid:#1f6dc0; --ruri-tint:#eaf2fb;
  --vermilion:#ff4f30; --vermilion-deep:#e23a1c;
  --gold:#e0c185; --gold-deep:#c7a55c; --gold-tint:#f6efe0;
  --sand:#faf6ee; --paper:#ffffff; --ink:#233247; --ink-2:#54617a; --muted:#8b95a7;
  --line:rgba(10,61,112,.12); --line-gold:rgba(224,193,133,.5);
  --serif:"Shippori Mincho B1","Yu Mincho","Hiragino Mincho ProN","Noto Serif JP",serif;
  --sans:"Noto Sans JP","Yu Gothic","Hiragino Kaku Gothic ProN",sans-serif;
  --en:"Cormorant Garamond",Georgia,"Times New Roman",serif;
  --max:1200px; --shadow:0 22px 55px rgba(10,61,112,.10); --shadow-soft:0 12px 34px rgba(10,61,112,.07);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mesh:repeating-linear-gradient(0deg,rgba(224,193,133,.11) 0 1px,transparent 1px 26px),
         repeating-linear-gradient(60deg,rgba(224,193,133,.11) 0 1px,transparent 1px 26px),
         repeating-linear-gradient(120deg,rgba(224,193,133,.11) 0 1px,transparent 1px 26px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);
  line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden;font-feature-settings:"palt";letter-spacing:.012em}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.4;margin:0;color:var(--ruri-deep)}
p{margin:0}
.container{width:min(100% - 44px,var(--max));margin-inline:auto}
.narrow{max-width:860px}
.eyebrow{font-family:var(--en);text-transform:uppercase;letter-spacing:.2em;font-size:.92rem;
  font-weight:600;color:var(--vermilion);display:inline-block;margin-bottom:14px}
.eyebrow--gold{color:var(--gold-deep)}
.eyebrow--ruri{color:var(--ruri)}
.section{padding:118px 0;position:relative;overflow:hidden}
.section--sand{background:var(--sand)}
.section--mesh::before{content:"";position:absolute;inset:0;background-image:var(--mesh);opacity:.6;pointer-events:none;
  -webkit-mask-image:radial-gradient(120% 90% at 90% 0%,#000,transparent 70%);mask-image:radial-gradient(120% 90% at 90% 0%,#000,transparent 70%)}
.section__head{max-width:780px;margin:0 auto 58px;text-align:center;position:relative}
.section__head h2{font-size:2.5rem}
.section__head p{margin-top:16px;color:var(--ink-2)}
.gold-rule{width:72px;height:2px;margin:20px auto 0;background:linear-gradient(90deg,transparent,var(--gold-deep),transparent)}
.reveal{opacity:0;transform:translateY(30px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.12s}.reveal[data-delay="2"]{transition-delay:.24s}
.reveal[data-delay="3"]{transition-delay:.36s}.reveal[data-delay="4"]{transition-delay:.48s}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--sans);font-weight:700;
  border-radius:8px;padding:14px 28px;transition:.28s var(--ease);border:1px solid transparent;cursor:pointer;font-size:.98rem}
.btn--primary{background:var(--vermilion);color:#fff;box-shadow:0 10px 26px rgba(255,79,48,.28);position:relative;overflow:hidden}
.btn--primary:hover{background:var(--vermilion-deep);transform:translateY(-2px);box-shadow:0 16px 36px rgba(255,79,48,.36)}
.btn--primary::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.35),transparent 70%);transform:translateX(-120%);transition:.6s}
.btn--primary:hover::after{transform:translateX(120%)}
.btn--ruri{background:var(--ruri);color:#fff}.btn--ruri:hover{background:var(--ruri-deep);transform:translateY(-2px)}
.btn--ghost{background:#fff;color:var(--ruri);border-color:var(--line-gold)}
.btn--ghost:hover{border-color:var(--ruri);box-shadow:var(--shadow-soft)}
.btn--gold{background:var(--gold);color:var(--ruri-deep)}.btn--gold:hover{background:var(--gold-deep);color:#fff}

/* ============ HEADER ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60;transition:.3s var(--ease);padding:16px 0}
.site-header.scrolled{background:rgba(255,255,255,.9);backdrop-filter:blur(14px);
  box-shadow:0 6px 22px rgba(10,61,112,.1);padding:9px 0;border-bottom:1px solid var(--line-gold)}
.hd-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:min(100% - 44px,1300px);margin-inline:auto}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:60px;height:60px;filter:drop-shadow(0 5px 14px rgba(224,193,133,.55))}
.brand b{font-family:var(--serif);color:var(--ruri-deep);font-size:1.14rem;font-weight:700;line-height:1.1}
.brand small{display:block;color:var(--muted);font-size:.66rem;letter-spacing:.02em}
.site-header:not(.scrolled) .brand b{color:var(--ruri-deep)}
.gnav{display:flex;align-items:center;gap:4px}
.gnav a{color:var(--ink-2);font-size:.9rem;font-weight:500;padding:8px 12px;border-radius:6px;transition:.2s}
.gnav a:hover{color:var(--vermilion)}
.gnav .btn{margin-left:10px;padding:10px 18px}
.gnav .btn--primary,.gnav .btn--primary:hover{color:#fff}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ruri-deep);display:block}

/* ============ 1. HERO (luminous / light) ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:130px 0 90px;
  background:
    linear-gradient(100deg,rgba(255,255,255,.86) 0%,rgba(255,255,255,.5) 30%,rgba(255,255,255,.12) 50%,rgba(255,255,255,0) 66%),
    url(../img/hero-campus.jpg) center right/cover no-repeat,
    #eef4fb}
.hero__mesh{position:absolute;inset:0;background-image:var(--mesh);opacity:.7;
  -webkit-mask-image:radial-gradient(90% 80% at 70% 35%,#000,transparent 75%);mask-image:radial-gradient(90% 80% at 70% 35%,#000,transparent 75%)}
.hero__glow{position:absolute;top:8%;right:6%;width:52vw;max-width:720px;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(224,193,133,.28),rgba(0,91,172,.06) 45%,transparent 70%);filter:blur(6px)}
.hero .container{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center}
.hero__eyebrow{font-family:var(--en);letter-spacing:.34em;color:var(--gold-deep);font-size:.92rem;margin-bottom:20px}
.hero h1{font-size:clamp(2.4rem,5vw,4rem);line-height:1.3;letter-spacing:.02em;
  background:linear-gradient(120deg,var(--ruri-deep) 30%,var(--ruri-mid));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 .accent{background:linear-gradient(120deg,var(--vermilion),#ff7a52);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__lead{margin-top:26px;color:var(--ink);font-size:1.12rem;max-width:26em;font-family:var(--serif);font-weight:500}
.hero__sub{margin-top:14px;color:var(--ink-2);font-size:.96rem;max-width:32em}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px}
.hero__badge{display:flex;gap:24px;margin-top:42px;flex-wrap:wrap}
.hero__badge div{border-left:2px solid var(--gold);padding-left:14px}
.hero__badge b{display:block;font-family:var(--serif);color:var(--ruri);font-size:1.5rem;line-height:1}
.hero__badge span{font-size:.8rem;color:var(--ink-2)}
.hero__logo{display:grid;place-items:center;position:relative}
.hero__logo img{width:min(100%,440px);filter:drop-shadow(0 24px 46px rgba(10,61,112,.22))}
.hero__logo::after{content:"";position:absolute;width:82%;aspect-ratio:1;border-radius:50%;z-index:-1;
  background:radial-gradient(circle,rgba(224,193,133,.5),transparent 66%);animation:halo 6s ease-in-out infinite}
@keyframes halo{0%,100%{transform:scale(1);opacity:.85}50%{transform:scale(1.07);opacity:1}}
.scroll-ind{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:var(--vermilion);
  font-family:var(--en);letter-spacing:.2em;font-size:.72rem;text-align:center}
.scroll-ind::after{content:"";display:block;width:1px;height:40px;margin:8px auto 0;background:linear-gradient(var(--vermilion),transparent);animation:scrolldot 1.8s infinite}
@keyframes scrolldot{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}50.1%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ============ 2. VISION + 軌跡 concept diagram ============ */
.vision{background:linear-gradient(180deg,#ffffff,var(--sand))}
.vision__lead{max-width:820px;margin:0 auto 56px;text-align:center}
.vision__lead h2{font-size:2.2rem;line-height:1.5}
.vision__lead p{margin-top:18px;color:var(--ink-2)}
.arc{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:stretch;gap:14px;max-width:1080px;margin:0 auto}
.arc__node{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;text-align:left;box-shadow:var(--shadow-soft);position:relative;margin:0;padding:0 24px 26px;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.arc__node:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.arc__photo{position:relative;margin:0 -24px 20px;aspect-ratio:16/10;overflow:hidden}
.arc__photo img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.arc__node:hover .arc__photo img{transform:scale(1.06)}
.arc__photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 48%,rgba(10,61,112,.3))}
.arc__node .pin{position:absolute;top:14px;left:14px;z-index:2;display:inline-block;font-size:.76rem;font-weight:700;padding:5px 15px;border-radius:20px;color:#fff;margin:0;letter-spacing:.06em;box-shadow:0 6px 16px rgba(10,61,112,.22)}
.arc__node--a .pin{background:var(--ruri)}
.arc__node--b{border-color:var(--line-gold)}
.arc__node--b .pin{background:var(--gold-deep)}
.arc__node--c .pin{background:var(--vermilion)}
.arc__node h3{font-size:1.18rem;margin-bottom:8px}
.arc__node--a h3{color:var(--ruri-deep)}.arc__node--b h3{color:var(--gold-deep)}.arc__node--c h3{color:var(--vermilion-deep)}
.arc__node p{font-size:.9rem;color:var(--ink-2)}
.arc__arrow{color:var(--gold-deep);font-size:1.8rem;align-self:center}
.letter-wrap{display:grid;grid-template-columns:.82fr 1.18fr;max-width:1080px;margin:64px auto 0;background:#fff;
  border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow-soft)}
.letter-photo{position:relative;min-height:330px}
.letter-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.letter-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 62%,rgba(255,255,255,.14))}
.letter{margin:0;background:#fff;border:0;border-left:4px solid var(--gold);border-radius:0;
  padding:42px 46px;max-width:none;box-shadow:none;align-self:center}
.letter p{color:var(--ink-2);margin-bottom:16px}.letter strong{color:var(--ruri)}
.letter .sign{font-family:var(--serif);color:var(--ruri-deep);font-weight:700;margin-top:22px}

/* ---- 京都大学 シネマティック帯（さりげなく） ---- */
.kyodai-band{position:relative;height:min(40vh,320px);overflow:hidden}
.kyodai-band img{width:100%;height:100%;object-fit:cover;object-position:center 58%}
.kyodai-band::after{content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(10,45,90,.62),rgba(10,45,90,.2) 52%,rgba(10,45,90,.02) 80%)}
.kyodai-band__cap{position:absolute;left:max(6%,calc(50% - var(--max)/2 + 22px));top:50%;transform:translateY(-50%);color:#fff;z-index:1;max-width:80%}
.kyodai-band__cap span{font-family:var(--en);letter-spacing:.28em;font-size:.82rem;opacity:.92;text-transform:uppercase}
.kyodai-band__cap p{font-family:var(--serif);font-size:clamp(1.3rem,3vw,2rem);font-weight:700;margin-top:10px;line-height:1.4;text-shadow:0 2px 18px rgba(6,26,54,.55)}

/* ---- 京大生コンテンツ（動画サムネイル） ---- */
.stories{background:radial-gradient(120% 80% at 50% 0%,#ffffff,var(--ruri-tint));position:relative}
.stories::before{content:"";position:absolute;inset:0;background:url(../img/kyodai-campus2.jpg) center 40%/cover;
  opacity:.06;pointer-events:none;-webkit-mask-image:linear-gradient(180deg,#000,transparent 85%);mask-image:linear-gradient(180deg,#000,transparent 85%)}
.stories .container{position:relative;z-index:1}
.kvideo-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:22px;max-width:1080px;margin:0 auto}
.kvideo{flex:0 1 310px;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  box-shadow:var(--shadow-soft);text-decoration:none;color:inherit;display:block;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.kvideo:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.kvideo__thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0a2540}
.kvideo__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.kvideo:hover .kvideo__thumb img{transform:scale(1.05)}
.kvideo__play{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.kvideo__play::before{content:"";width:52px;height:52px;border-radius:50%;background:rgba(255,79,48,.92);
  box-shadow:0 6px 20px rgba(0,0,0,.4);transition:.3s}
.kvideo__play::after{content:"";position:absolute;border-style:solid;border-width:9px 0 9px 16px;
  border-color:transparent transparent transparent #fff;margin-left:4px}
.kvideo:hover .kvideo__play::before{background:var(--vermilion);transform:scale(1.08)}
.kvideo__lock{position:absolute;top:10px;right:10px;background:rgba(10,45,90,.85);color:#fff;font-size:.68rem;
  font-weight:700;padding:3px 11px;border-radius:20px;letter-spacing:.04em}
.kvideo__body{padding:15px 17px 17px}
.kvideo__dept{font-family:var(--serif);font-size:1rem;color:var(--ruri-deep);font-weight:700;line-height:1.45}
.kvideo__meta{font-size:.82rem;color:var(--muted);margin-top:5px;letter-spacing:.03em}
.kvideo-cta{text-align:center;margin-top:38px}
.stories__note{color:var(--muted);font-size:.8rem;margin-top:16px}

/* ============ 3. 5 MOTIFS ============ */
.motifs{background:radial-gradient(120% 90% at 50% 0%,#ffffff,var(--ruri-tint) 120%);position:relative}
.brand-logo{display:grid;place-items:center;position:relative;margin:0 auto 6px}
.brand-logo img{width:min(230px,52%);filter:drop-shadow(0 20px 46px rgba(224,193,133,.55));animation:float 6s ease-in-out infinite;position:relative;z-index:1}
.brand-logo::after{content:"";position:absolute;width:min(360px,80%);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(224,193,133,.42),rgba(0,91,172,.05) 46%,transparent 70%);animation:halo 6s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.motif-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;max-width:1120px;margin:0 auto}
.motif{background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px 20px;text-align:center;transition:.32s var(--ease);position:relative;overflow:hidden}
.motif::after{content:"";position:absolute;inset:auto -30% -40% -30%;height:70%;background:radial-gradient(ellipse at bottom,rgba(224,193,133,.22),transparent 70%);opacity:0;transition:.32s}
.motif:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--line-gold)}
.motif:hover::after{opacity:1}
.motif__icon{width:74px;height:74px;margin:0 auto 16px;border-radius:50%;display:grid;place-items:center;
  background:var(--gold-tint);color:var(--gold-deep);transition:.32s;position:relative;z-index:1}
.motif:hover .motif__icon{color:#fff;box-shadow:0 0 26px rgba(224,193,133,.7)}
.motif:nth-child(1):hover .motif__icon,.motif:nth-child(4):hover .motif__icon{background:var(--ruri)}
.motif:nth-child(2):hover .motif__icon,.motif:nth-child(5):hover .motif__icon{background:var(--vermilion)}
.motif:nth-child(3):hover .motif__icon{background:var(--gold-deep)}
.motif__icon svg{width:40px;height:40px}
.motif h3{font-size:1.1rem;margin-bottom:6px;position:relative;z-index:1}
.motif h3 small{display:block;font-family:var(--en);color:var(--vermilion);font-size:.66rem;letter-spacing:.12em;margin-bottom:4px}
.motif p{color:var(--ink-2);font-size:.84rem;position:relative;z-index:1}

/* ============ 4. CONCEPTS (venn/tabs) — light ============ */
.concepts{background:var(--sand)}
.concept-wrap{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.venn{position:relative;aspect-ratio:1/.86;max-width:480px;margin:0 auto;width:100%}
.venn circle{fill:rgba(0,91,172,.02);stroke-width:2.4;transition:.35s;cursor:pointer}
.venn .c1{stroke:var(--ruri)}.venn .c2{stroke:var(--gold-deep)}.venn .c3{stroke:var(--vermilion)}
.venn text{fill:var(--ruri-deep);font-family:var(--serif);font-size:15px;font-weight:700;pointer-events:none}
.venn g.tab{cursor:pointer}.venn g.tab:hover circle{fill:rgba(0,91,172,.05)}
.venn g.active circle{filter:drop-shadow(0 0 8px currentColor)}
.venn .dot{fill:var(--gold-deep)}
.concept-panel{background:#fff;border:1px solid var(--line);border-top:3px solid var(--gold);border-radius:14px;padding:38px 36px;min-height:224px;box-shadow:var(--shadow-soft)}
.concept-panel .num{font-family:var(--en);color:var(--gold-deep);letter-spacing:.2em;font-size:.8rem}
.concept-panel h3{font-size:1.7rem;margin:10px 0 16px}
.concept-panel p{color:var(--ink-2)}
.concept-tabs{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.concept-tabs button{background:#fff;border:1px solid var(--line);color:var(--ink-2);border-radius:22px;padding:8px 16px;
  font-family:var(--sans);font-size:.85rem;cursor:pointer;transition:.25s}
.concept-tabs button.active{background:var(--ruri);color:#fff;border-color:var(--ruri);font-weight:700}
.concept-photo{max-width:1000px;margin:0 auto 48px;border-radius:18px;overflow:hidden;position:relative;box-shadow:var(--shadow-soft)}
.concept-photo img{width:100%;display:block;aspect-ratio:24/9;object-fit:cover}
.concept-photo figcaption{position:absolute;left:24px;bottom:16px;color:#fff;font-family:var(--serif);font-weight:700;font-size:1.06rem;text-shadow:0 2px 14px rgba(10,40,80,.85)}
.concept-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 44%,rgba(10,45,90,.52))}

/* ============ 5. 2026 ECOSYSTEM ============ */
.eco{background:var(--paper)}
.eco-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.eco-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-soft);display:flex;flex-direction:column}
.eco-card__photo{position:relative;aspect-ratio:16/8;overflow:hidden}
.eco-card__photo img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.eco-card:hover .eco-card__photo img{transform:scale(1.05)}
.eco-card__photo .human-tag{position:absolute;left:16px;bottom:14px;z-index:2;color:#fff;font-family:var(--serif);font-weight:700;font-size:1.02rem;text-shadow:0 2px 12px rgba(10,40,80,.8)}
.eco-card__photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(10,45,90,.55))}
.eco-card__top{padding:22px 30px;color:#fff;display:flex;align-items:center;gap:14px}
.eco-card--myobi .eco-card__top{background:linear-gradient(120deg,var(--vermilion),#ff7a52)}
.eco-card--app .eco-card__top{background:linear-gradient(120deg,var(--ruri),var(--ruri-mid))}
.eco-card__top .tag{font-family:var(--en);font-size:.66rem;letter-spacing:.14em;opacity:.9;display:block}
.eco-card__top h3{color:#fff;font-size:1.34rem}
.eco-card__body{padding:28px 30px 32px;flex:1}
.eco-card__body p{color:var(--ink-2);font-size:.94rem;margin-bottom:18px}
.eco-card ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.eco-card li{padding-left:26px;position:relative;color:var(--ink);font-size:.92rem}
.eco-card li::before{content:"";position:absolute;left:0;top:.55em;width:9px;height:9px;border-radius:2px;transform:rotate(45deg)}
.eco-card--myobi li::before{background:var(--vermilion)}.eco-card--app li::before{background:var(--gold-deep)}
.mock{margin-top:20px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--sand)}
.mock__bar{background:var(--ruri-deep);color:#fff;font-size:.78rem;padding:8px 14px}
.mock__bar b{font-weight:700}
.karte{padding:16px}
.karte-row{display:flex;justify-content:space-between;border-bottom:1px dashed var(--line);padding:7px 0;font-size:.82rem}
.karte-row span:first-child{color:var(--muted)}.karte-row span:last-child{color:var(--ruri-deep);font-weight:700}
.chat{padding:16px;display:grid;gap:10px}
.bubble{max-width:80%;padding:9px 13px;border-radius:12px;font-size:.82rem;line-height:1.6}
.bubble.ai{background:#eef2f7;color:var(--ink);border-bottom-left-radius:3px}
.bubble.human{background:var(--gold-tint);color:var(--ink);border-bottom-left-radius:3px}
.bubble.user{background:var(--ruri);color:#fff;margin-left:auto;border-bottom-right-radius:3px}
.eco-video{margin:22px 0 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#0a2540;box-shadow:var(--shadow-soft)}
.eco-video video{width:100%;aspect-ratio:16/9;display:block;background:#0a2540}
.eco-video figcaption{background:var(--ruri-deep);color:#fff;font-size:.8rem;font-weight:700;padding:9px 14px;letter-spacing:.02em}
.eco-link{display:inline-flex;align-items:center;gap:.5em;margin-top:22px;font-family:var(--sans);font-weight:700;font-size:.92rem;
  padding:12px 24px;border-radius:8px;text-decoration:none;transition:.28s var(--ease)}
.eco-card--myobi .eco-link{background:var(--vermilion);color:#fff;box-shadow:0 8px 22px rgba(255,79,48,.28)}
.eco-card--myobi .eco-link:hover{background:var(--vermilion-deep);transform:translateY(-2px);gap:.75em}
.eco-card--app .eco-link{background:var(--ruri);color:#fff;box-shadow:0 8px 22px rgba(0,91,172,.24)}
.eco-card--app .eco-link:hover{background:var(--ruri-deep);transform:translateY(-2px);gap:.75em}

/* ============ 6. ONLINE SYSTEM (watermark photo) ============ */
.online{position:relative;color:#fff;background:linear-gradient(120deg,var(--ruri-deep),var(--ruri) 70%)}
.online::before{content:"";position:absolute;inset:0;background:url(../img/online-koukou.jpg) center 34%/cover;opacity:.1;mix-blend-mode:luminosity;pointer-events:none}
.online::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(10,61,112,.55),rgba(0,91,172,.2) 70%);pointer-events:none}
.online .section__head h2,.online .section__head p{color:#fff}
.online .section__head p{color:rgba(255,255,255,.78)}
.online .container{position:relative;z-index:1}
.online-photo{max-width:1000px;margin:0 auto 42px;border-radius:18px;overflow:hidden;position:relative;
  box-shadow:0 26px 64px rgba(0,0,0,.34);border:1px solid rgba(224,193,133,.45)}
.online-photo img{width:100%;display:block;aspect-ratio:21/8;object-fit:cover}
.online-photo figcaption{position:absolute;left:22px;bottom:16px;color:#fff;font-family:var(--serif);font-weight:700;
  font-size:1.05rem;text-shadow:0 2px 14px rgba(6,30,60,.85)}
.online-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(8,38,74,.5))}
.lk-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.lk-card{background:rgba(255,255,255,.08);border:1px solid rgba(224,193,133,.35);border-radius:14px;padding:30px 26px;backdrop-filter:blur(4px)}
.lk-card .n{font-family:var(--en);color:var(--gold);font-size:1.9rem;line-height:1}
.lk-card h3{color:#fff;font-size:1.16rem;margin:12px 0 8px}
.lk-card p{color:rgba(255,255,255,.82);font-size:.9rem}
.lk-req{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:34px}
.lk-req span{border:1px solid rgba(224,193,133,.5);border-radius:30px;padding:8px 18px;font-size:.84rem;color:#fff;background:rgba(255,255,255,.06)}

/* ============ 7. FLOW + COMPANY ============ */
.flow{background:var(--sand)}
.timeline{max-width:760px;margin:0 auto;position:relative;padding-left:40px}
.timeline::before{content:"";position:absolute;left:15px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--gold-deep),var(--line-gold))}
.tl-step{position:relative;padding:0 0 34px 26px}
.tl-step::before{content:attr(data-n);position:absolute;left:-40px;top:-4px;width:32px;height:32px;border-radius:50%;
  background:var(--ruri);color:#fff;font-family:var(--en);display:grid;place-items:center;font-size:.9rem;border:2px solid var(--gold)}
.tl-step h3{font-size:1.16rem;margin-bottom:6px}
.tl-step p{color:var(--ink-2);font-size:.94rem}
.company{margin-top:56px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:38px 42px;
  display:grid;grid-template-columns:1fr 1fr;gap:28px;box-shadow:var(--shadow-soft)}
.company h3{grid-column:1/-1;font-size:1.3rem;margin-bottom:4px}
.company dt{font-family:var(--en);color:var(--gold-deep);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase}
.company dd{margin:2px 0 14px;color:var(--ink-2);font-size:.92rem}

/* CTA band — luminous ruri×gold */
.cta-band{background:radial-gradient(120% 150% at 50% 0%,#0a4a8f,var(--ruri-deep));color:#fff;text-align:center;position:relative;overflow:hidden;padding:100px 0}
.cta-band::before{content:"";position:absolute;inset:0;background:url(../img/ppl-walk.jpg) center 30%/cover;opacity:.4;mix-blend-mode:luminosity;pointer-events:none}
.cta-band::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 130% at 50% 10%,rgba(10,61,112,.25),rgba(10,45,90,.72));pointer-events:none}
.cta-band .container{position:relative;z-index:2}
.cta-band .fan{z-index:1}
.cta-band .fan{position:absolute;left:50%;bottom:-46%;transform:translateX(-50%);width:900px;max-width:150%;opacity:.55}
.cta-band h2{color:#fff;font-size:2.4rem;position:relative}
.cta-band p{color:rgba(255,255,255,.85);margin:16px auto 30px;max-width:34em;position:relative}
.cta-note{color:var(--gold);font-size:.88rem;margin-bottom:14px;font-family:var(--en);letter-spacing:.1em;position:relative}

/* sticky bottom CTA */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:55;background:var(--vermilion);
  transform:translateY(120%);transition:.4s var(--ease);box-shadow:0 -8px 30px rgba(255,79,48,.3)}
.sticky-cta.show{transform:none}
.sticky-cta .in{width:min(100% - 44px,var(--max));margin-inline:auto;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 0}
.sticky-cta p{color:#fff;font-weight:700;font-size:.98rem}
.sticky-cta p small{display:block;font-weight:400;font-size:.76rem;opacity:.9}
.sticky-cta .btn--gold{white-space:nowrap;background:#fff;color:var(--vermilion)}
.sticky-cta .btn--gold:hover{background:var(--gold);color:var(--ruri-deep)}

/* footer — deep ruri */
.foot{background:var(--ruri-deep);color:rgba(255,255,255,.72);padding:72px 0 0;position:relative}
.foot::before{content:"";position:absolute;top:0;left:0;right:0;height:24px;background:url(../img/seigaiha.png) repeat-x;background-size:48px 24px;opacity:.7}
.foot__main{display:grid;grid-template-columns:1.6fr 1fr 1.4fr;gap:36px;padding-top:22px}
.foot .brand b{color:#fff;font-size:1.1rem}.foot .brand small{color:rgba(255,255,255,.6)}
.foot__note{font-size:.85rem;color:rgba(255,255,255,.6);margin-top:14px;max-width:34ch;line-height:1.85}
.foot h4{color:var(--gold);font-family:var(--sans);font-size:.82rem;letter-spacing:.12em;border-bottom:1px solid rgba(224,193,133,.35);padding-bottom:10px;margin:0 0 12px}
.foot a{display:block;color:rgba(255,255,255,.72);font-size:.9rem;padding:4px 0}.foot a:hover{color:var(--gold)}
.foot__info p{font-size:.84rem;line-height:1.9;color:rgba(255,255,255,.66);margin-bottom:12px}.foot__info strong{color:#fff}
.foot__bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:44px;padding:20px 0;text-align:center;font-size:.82rem;color:rgba(255,255,255,.5)}
.preview-flag{position:fixed;top:0;left:0;z-index:80;background:var(--gold);color:var(--ruri-deep);font-size:.7rem;font-weight:700;padding:3px 10px;border-bottom-right-radius:6px;letter-spacing:.05em}

/* ============ RESPONSIVE ============ */
@media(max-width:1000px){
  .gnav{position:fixed;inset:0 0 0 auto;width:min(80%,320px);flex-direction:column;align-items:stretch;
    background:#fff;padding:90px 24px;transform:translateX(100%);transition:.3s var(--ease);gap:2px;box-shadow:-10px 0 40px rgba(10,61,112,.12)}
  .gnav.open{transform:none}.gnav .btn{margin:14px 0 0}
  .nav-toggle{display:flex;z-index:70}
  .hero .container,.concept-wrap,.eco-grid,.company,.letter-wrap{grid-template-columns:1fr}
  .letter-photo{min-height:220px}
  .hero{align-items:flex-start;min-height:auto;padding:120px 0 70px;
    background:
      linear-gradient(180deg,rgba(255,255,255,.93) 0%,rgba(255,255,255,.74) 28%,rgba(255,255,255,.34) 48%,rgba(255,255,255,.04) 68%),
      url(../img/hero-campus.jpg) center 24%/cover no-repeat,#eef4fb}
  .motif-grid{grid-template-columns:repeat(2,1fr)}
  .lk-grid{grid-template-columns:1fr}
  .arc{grid-template-columns:1fr;gap:8px}.arc__arrow{transform:rotate(90deg)}
  .foot__main{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .section{padding:78px 0}.section__head h2{font-size:1.9rem}
  .hero h1{font-size:2.1rem}.motif-grid{grid-template-columns:1fr}
  .company,.foot__main{grid-template-columns:1fr}
  .sticky-cta .in{flex-direction:column;gap:8px;text-align:center}
  .cta-form__grid{grid-template-columns:1fr}
  .cta-form{padding:24px 18px 20px}
}

/* ===== お問い合わせフォーム（CTAバンド内） ===== */
.cta-form{max-width:640px;margin:36px auto 0;background:#fff;border-radius:16px;padding:32px 30px 26px;
  box-shadow:0 24px 60px rgba(6,26,54,.34);text-align:left;position:relative;z-index:2}
.cta-form__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cta-field{display:block;font-size:.84rem;font-weight:700;color:var(--ruri-deep)}
.cta-field--full{grid-column:1/-1}
.cta-field .req{display:inline-block;color:#fff;background:var(--vermilion);font-size:.62rem;border-radius:4px;padding:1px 7px;margin-left:8px;font-weight:700;vertical-align:2px}
.cta-field .opt{display:inline-block;color:var(--ink-2);background:var(--sand);font-size:.62rem;border-radius:4px;padding:1px 7px;margin-left:8px;border:1px solid var(--line);font-weight:700;vertical-align:2px}
.cta-field input,.cta-field textarea{font-family:var(--sans);font-size:.95rem;font-weight:400;color:var(--ink);
  border:1px solid var(--line);border-radius:8px;padding:11px 13px;background:#fdfdfd;transition:.2s;width:100%;display:block;margin-top:7px}
.cta-field input:focus,.cta-field textarea:focus{outline:none;border-color:var(--ruri);box-shadow:0 0 0 3px rgba(0,91,172,.12);background:#fff}
.cta-field textarea{resize:vertical;min-height:118px;line-height:1.7}
.cta-hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.cta-form .g-recaptcha{margin:18px 0 2px;display:flex;justify-content:center}
.cta-form__submit{width:100%;justify-content:center;margin-top:20px;padding:15px;font-size:1.02rem}
.cta-form__note{margin-top:14px;text-align:center;font-size:.78rem;color:var(--muted)}