/* 案2「高速標識」— スクロールすると走る。ページ全体が道路と標識でできている */
:root{--road:#24272c;--road2:#1a1c20;--green:#0a6b45;--blue:#0b4ea2;--brown:#6b3f1e;--yellow:#ffd21a;--white:#f6f6f2;--f-j:"Noto Sans JP",sans-serif;--f-n:"Barlow Condensed","Noto Sans JP",sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--road);color:var(--white);font-family:var(--f-j);font-weight:500;line-height:1.8;overflow-x:hidden;
  background-image:radial-gradient(rgba(255,255,255,.035) 1px,transparent 1px);background-size:5px 5px}
a{color:inherit;text-decoration:none}
h1,h2,h3,p{margin:0}
.en{font-family:var(--f-n)}
/* 標識の基本形 */
.sign{background:var(--green);color:#fff;border:5px solid #fff;border-radius:16px;box-shadow:0 0 0 3px var(--green),0 14px 30px rgba(0,0,0,.45);position:relative}
.sign.blue{background:var(--blue);box-shadow:0 0 0 3px var(--blue),0 14px 30px rgba(0,0,0,.45)}
.sign.brown{background:var(--brown);box-shadow:0 0 0 3px var(--brown),0 14px 30px rgba(0,0,0,.45)}
.sign.white{background:#fff;color:#111;border-color:#c00;box-shadow:0 14px 30px rgba(0,0,0,.45)}
.todo{background:var(--yellow);color:#000;padding:0 .3em;border-radius:3px;font-weight:900;font-size:.85em}
/* 中央線(スクロールで流れる) */
.lane{position:fixed;left:50%;top:0;bottom:0;width:10px;margin-left:-5px;z-index:0;opacity:.28;
  background:repeating-linear-gradient(180deg,var(--yellow) 0 56px,transparent 56px 112px);background-position:0 var(--ly,0)}
main,.ft{position:relative;z-index:2}
/* ETCゲート */
.gate{position:fixed;inset:0;z-index:100;background:var(--road2);display:grid;place-items:center;text-align:center;transition:opacity .6s .9s,visibility 0s 1.5s}
.gate.open{opacity:0;visibility:hidden;pointer-events:none}
.gate .bar{position:absolute;left:0;top:34%;width:55%;height:22px;background:repeating-linear-gradient(90deg,#fff 0 40px,#e11 40px 80px);transform-origin:left center;transition:transform .8s .3s cubic-bezier(.5,0,.2,1);border-radius:0 11px 11px 0}
.gate.open .bar{transform:rotate(-70deg)}
.gate p{font-family:var(--f-n);font-size:clamp(1.6rem,5vw,3rem);font-weight:800;color:#6ff3a0;letter-spacing:.04em}
.gate small{display:block;font-family:var(--f-j);font-size:.9rem;color:#aaa;font-weight:500}
/* ヘッダー(ガントリー) */
.hd{position:fixed;top:10px;left:10px;right:10px;z-index:60;display:flex;gap:10px;justify-content:space-between;align-items:stretch}
.nav-logo{padding:6px 18px;font-weight:900;font-size:1.05rem;line-height:1.2;display:flex;flex-direction:column;justify-content:center}
.nav-logo small{font-family:var(--f-n);font-size:.75rem;letter-spacing:.2em;font-weight:600}
.nav{display:flex;overflow:hidden}
.nav a{display:flex;align-items:center;gap:6px;padding:6px clamp(10px,2vw,22px);font-weight:900;border-left:2px solid rgba(255,255,255,.5)}
.nav a:first-child{border:0}
.nav a span{font-family:var(--f-n);font-size:1.3rem}
.nav a:hover,.nav a[aria-current]{background:#fff;color:var(--green)}
/* ヒーロー: 遠近法の道路 */
.hero{position:relative;min-height:100svh;overflow:hidden;display:flex;flex-direction:column;align-items:center;padding:110px 16px 0;background:linear-gradient(180deg,#0b1020 0%,#1d2c4d 45%,#e9a15f 62%,#24272c 62%)}
.hero .sun{position:absolute;left:50%;top:44%;width:min(46vw,380px);aspect-ratio:1;margin-left:calc(min(46vw,380px) / -2);border-radius:50%;background:radial-gradient(circle,#fff3c4,#ffb25a 55%,transparent 70%);filter:blur(2px);z-index:0}
.road{position:absolute;left:-30%;right:-30%;bottom:0;height:40%;background:#2b2e34;transform:perspective(380px) rotateX(58deg);transform-origin:bottom;z-index:1;overflow:hidden}
.road::before{content:"";position:absolute;left:50%;width:2.5%;margin-left:-1.25%;top:0;bottom:0;background:repeating-linear-gradient(180deg,var(--yellow) 0 70px,transparent 70px 140px);animation:drive 1s linear infinite}
.road::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 14%,#fff 14% 15%,transparent 15% 85%,#fff 85% 86%,transparent 86%)}
@keyframes drive{to{background-position:0 140px}}
.gantry{position:relative;z-index:3;width:min(1100px,100%);margin-top:clamp(8px,4vh,40px)}
.gantry::before,.gantry::after{content:"";position:absolute;top:100%;width:12px;height:60vh;background:linear-gradient(90deg,#555,#999,#555);z-index:-1}
.gantry::before{left:12%}.gantry::after{right:12%}
.signs{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(8px,2vw,24px);padding:0 0 0}
.signs .sign{padding:clamp(10px,2vw,22px);text-align:center}
.signs .arr{font-family:var(--f-n);font-size:clamp(2.6rem,8vw,6rem);line-height:1;font-weight:800}
.signs b{display:block;font-size:clamp(1.3rem,3.6vw,2.8rem);font-weight:900;line-height:1.2}
.signs small{font-family:var(--f-n);letter-spacing:.1em;font-size:clamp(.8rem,1.6vw,1.1rem)}
.title-sign{margin:0 auto clamp(10px,2vw,20px);padding:clamp(14px,3vw,32px);text-align:center}
.title-sign h1{font-size:clamp(2.4rem,9vw,7rem);font-weight:900;line-height:1.1;letter-spacing:.04em}
.title-sign p{font-family:var(--f-n);font-weight:600;letter-spacing:.14em;font-size:clamp(.85rem,2vw,1.4rem)}
.hero-note{position:relative;z-index:3;margin-top:auto;padding:0 0 28px;text-align:center;font-weight:700;text-shadow:0 2px 8px #000}
/* セクション */
.sec{padding:clamp(56px,9vw,120px) clamp(16px,4vw,48px);max-width:1180px;margin:auto}
.km{display:inline-flex;gap:10px;align-items:center;margin-bottom:20px;font-family:var(--f-n);font-weight:800;font-size:1.3rem;background:var(--yellow);color:#000;padding:2px 18px;transform:rotate(45deg) rotate(-45deg);clip-path:polygon(12px 0,100% 0,calc(100% - 12px) 100%,0 100%)}
h2.t{font-size:clamp(2rem,6vw,4.6rem);font-weight:900;line-height:1.15;margin-bottom:.5em}
.lead{font-size:clamp(1.2rem,2.6vw,1.9rem);font-weight:700;line-height:1.7;max-width:26em}
.grid{display:grid;gap:clamp(14px,2.4vw,28px);grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));margin-top:32px}
.card{padding:22px 24px;transition:transform .3s cubic-bezier(.3,1.6,.5,1)}
.card:hover{transform:translateY(-8px) rotate(-1deg)}
.card h3{font-size:1.4rem;font-weight:900;line-height:1.3}
.card .e{font-family:var(--f-n);letter-spacing:.1em;opacity:.8;font-weight:600}
.card .ph{height:150px;margin:-6px -8px 14px;border-radius:8px;background:repeating-linear-gradient(135deg,rgba(255,255,255,.12) 0 14px,rgba(255,255,255,.04) 14px 28px);display:grid;place-items:center;font-size:.8rem;opacity:.85}
.card p{margin-top:6px;font-size:.95rem}
.tbl{display:grid;grid-template-columns:8em 1fr;font-size:1.05rem}
.tbl dt,.tbl dd{margin:0;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.35)}
.tbl dt{font-weight:900}
.signbox{padding:clamp(18px,3vw,36px)}
.pg{padding:150px clamp(16px,4vw,48px) 0;max-width:1180px;margin:auto}
.pg .sign{padding:clamp(16px,4vw,44px)}
.pg h1{font-size:clamp(3rem,12vw,9rem);font-weight:900;line-height:1;letter-spacing:.02em}
.pg p.e{font-family:var(--f-n);letter-spacing:.2em;font-weight:600;font-size:1.2rem}
.warn{display:inline-block;background:var(--yellow);color:#000;font-weight:900;padding:2px 14px;border:3px solid #000;border-radius:4px;margin-bottom:12px}
/* フッター: 出口標識 */
.ft{padding:60px clamp(16px,4vw,48px) 100px}
.exit{max-width:1100px;margin:auto;display:flex;gap:clamp(16px,4vw,48px);align-items:center;padding:clamp(18px,4vw,44px);flex-wrap:wrap}
.exit b{font-size:clamp(4rem,14vw,10rem);line-height:.9;font-weight:800;letter-spacing:.02em}
.exit .big{font-size:clamp(1.6rem,4vw,3rem);font-weight:900;line-height:1.3}
.cp{text-align:center;margin-top:24px;opacity:.6;font-size:.85rem}
/* ダッシュボード */
.dash{position:fixed;right:10px;bottom:10px;z-index:60;display:flex;gap:8px;align-items:center}
.odo{background:#000;border:2px solid #555;border-radius:8px;padding:2px 12px;font-family:var(--f-n);font-weight:600;color:#9ff;letter-spacing:.08em}
.odo b{font-weight:800;color:#fff}
#horn{font:inherit;font-weight:900;background:var(--yellow);border:3px solid #000;border-radius:999px;padding:2px 14px;cursor:pointer}
#horn:active{transform:scale(.92)}
.rv{opacity:0;transform:translateX(-40px) scale(.97);transition:.7s cubic-bezier(.2,.9,.3,1.2)}
.rv.on{opacity:1;transform:none}
@media(max-width:560px){.signs{grid-template-columns:1fr}.hd{flex-direction:column}.nav{justify-content:center}.hero{padding-top:130px}.tbl{grid-template-columns:6em 1fr}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.rv{opacity:1;transform:none}}
.tbl.m{grid-template-columns:1fr auto;column-gap:16px}.tbl.m dt{font-weight:700}.tbl.m dd{text-align:right;font-family:var(--f-n);font-size:1.25rem;font-weight:800;white-space:nowrap}.sign h3{margin-bottom:6px}