/*
 * style.css — 光触媒コーティング JOKING（ジョキング）
 * デザイン方針：ピンク×グリーン×ゴールドのマスコットキャラクターを軸に、
 * 科学的エビデンスの信頼感を伝えるスカイブルーを差し色に使う。丸ゴシックで親しみやすく。
 */
:root{
  --pink-900:#7a1f47; --pink-700:#c93d74; --pink-600:#e0578e; --pink-500:#ec7aa3; --pink-300:#f5b3cd; --pink-050:#fdeef4;
  --green-700:#4f8a1f; --green-600:#6fb238; --green-400:#a6d67c; --green-050:#f0f9e8;
  --gold:#c9a227; --gold-dark:#a3821c;
  --sky-700:#1f6fa8; --sky-600:#2f8fd1; --sky-400:#7ec1ec; --sky-050:#eaf6fd;
  --ink-900:#2a2320; --ink-600:#5c5350; --ink-400:#948b87; --line:#f0e3e8;
  --paper:#fffaf9; --paper-2:#fdf3f6; --white:#fff;
  --round:"Zen Maru Gothic","Hiragino Maru Gothic ProN",sans-serif;
  --sans:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
  --wrap:1140px; --header-h:76px; --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink-900);background:var(--paper);line-height:1.85;letter-spacing:.02em;font-size:16px;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s,opacity .2s}
ul{list-style:none}
.wrap{width:min(var(--wrap),92%);margin-inline:auto}
.round{font-family:var(--round)}

/* セクション */
.section{padding:clamp(3.25rem,7vw,5.75rem) 0}
.section--tint{background:var(--paper-2)}
.section--sky{background:linear-gradient(160deg,var(--sky-700),var(--sky-600));color:#eaf6ff}
.section-head{margin-bottom:clamp(1.75rem,4vw,3rem);text-align:center}
.section-head .en{display:block;font-size:.72rem;letter-spacing:.3em;color:var(--pink-600);font-weight:700;margin-bottom:.55rem}
.section-head .ja{font-family:var(--round);font-size:clamp(1.5rem,3.4vw,2.15rem);font-weight:700;color:var(--pink-900);line-height:1.5}
.section-head .lead{margin:1rem auto 0;color:var(--ink-600);max-width:640px}
.section--sky .section-head .ja{color:#fff}
.section--sky .section-head .en{color:var(--sky-400)}
.section--sky .section-head .lead{color:#dff1fc}

/* ボタン */
.btn{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;font-size:.94rem;padding:.9rem 2rem;border-radius:999px;border:2px solid var(--pink-600);color:var(--pink-700);background:transparent;cursor:pointer;transition:.25s}
.btn:hover{background:var(--pink-600);color:#fff}
.btn--fill{background:var(--pink-600);color:#fff}
.btn--fill:hover{background:var(--pink-700);border-color:var(--pink-700)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:#4a3a06}
.btn--gold:hover{background:var(--gold-dark);border-color:var(--gold-dark);color:#fff}
.btn--ghost{border-color:rgba(255,255,255,.7);color:#fff}
.btn--ghost:hover{background:#fff;color:var(--pink-700);border-color:#fff}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(4px)}

/* ヘッダー */
.header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-h);display:flex;align-items:center;background:rgba(255,255,255,.96);box-shadow:0 1px 0 var(--line);backdrop-filter:saturate(1.2) blur(4px)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;width:min(var(--wrap),95%)}
.brand{display:flex;align-items:center;gap:.5rem}
.brand img{height:32px;width:auto}
.nav{display:flex;align-items:center;gap:1.5rem}
.nav a{color:var(--ink-900);font-size:.88rem;font-weight:500;position:relative;padding:.3rem 0}
.nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--pink-500);transition:width .25s}
.nav a:hover{color:var(--pink-600)}
.nav a:hover::after,.nav a.active::after{width:100%}
.nav__cta{background:var(--pink-600);color:#fff!important;padding:.55rem 1.3rem!important;border-radius:999px}
.nav__cta::after{display:none}
.nav__cta:hover{background:var(--pink-700)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:34px;height:26px;position:relative}
.nav-toggle span{position:absolute;left:0;width:100%;height:2px;background:var(--pink-700);transition:.3s}
.nav-toggle span:nth-child(1){top:2px}.nav-toggle span:nth-child(2){top:12px}.nav-toggle span:nth-child(3){top:22px}
.nav-toggle.open span:nth-child(1){top:12px;transform:rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){top:12px;transform:rotate(-45deg)}

/* ヒーロー */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;color:#fff;overflow:hidden;background:linear-gradient(155deg,var(--pink-700) 0%,var(--pink-600) 55%,var(--pink-500) 100%)}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 500px at 82% 10%,rgba(255,255,255,.18),transparent 60%);}
.hero::after{content:"";position:absolute;right:-8%;bottom:-12%;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(201,162,39,.3),transparent 68%)}
.hero__inner{position:relative;z-index:2;padding-top:var(--header-h);display:grid;grid-template-columns:1.2fr .8fr;gap:2rem;align-items:center}
.hero__eyebrow{font-size:.8rem;letter-spacing:.24em;color:#ffe1ee;margin-bottom:1.2rem;font-weight:700}
.hero h1{font-family:var(--round);font-weight:700;font-size:clamp(1.8rem,4.4vw,3.1rem);line-height:1.5;margin-bottom:1.4rem}
.hero h1 .u{background:linear-gradient(transparent 62%,rgba(201,162,39,.55) 62%)}
.hero__lead{max-width:560px;color:#fff0f6;font-size:clamp(.96rem,1.6vw,1.05rem);margin-bottom:2.2rem}
.hero__actions{display:flex;gap:1rem;flex-wrap:wrap}
.hero__char{position:relative;text-align:center}
.hero__char img{max-width:280px;margin-inline:auto;filter:drop-shadow(0 20px 30px rgba(0,0,0,.2))}
.hero__wave{position:absolute;left:0;right:0;bottom:-1px;z-index:1;line-height:0}
.hero__wave svg{width:100%;height:70px;display:block}
@media(max-width:820px){.hero__inner{grid-template-columns:1fr;text-align:center}.hero__lead{margin-inline:auto}.hero__actions{justify-content:center}.hero__char img{max-width:200px}}

/* 統計 */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2rem 1.25rem;text-align:center}
.stat b{font-family:var(--round);font-size:clamp(2rem,4vw,2.6rem);color:var(--pink-600)}
.stat span.unit{font-size:1.1rem;color:var(--pink-600);font-weight:700;margin-left:.15rem}
.stat p{margin-top:.5rem;font-size:.86rem;color:var(--ink-600)}

/* 効果ピラー */
.pillars{display:grid;grid-template-columns:repeat(5,1fr);gap:1.1rem}
.pillar{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1.2rem;text-align:center;transition:.25s}
.pillar:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(201,61,116,.14)}
.pillar__ic{width:52px;height:52px;margin:0 auto .9rem;border-radius:50%;display:grid;place-items:center;background:var(--pink-050);color:var(--pink-600);font-size:1.4rem}
.pillar h3{font-family:var(--round);font-size:1rem;color:var(--pink-900);margin-bottom:.5rem}
.pillar p{font-size:.84rem;color:var(--ink-600)}
@media(max-width:900px){.pillars{grid-template-columns:repeat(2,1fr)}}

/* 光触媒とは */
.about-diagram{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:center}
.about-diagram .checks{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.4rem}
.about-diagram .checks span{background:var(--green-050);color:var(--green-700);border-radius:999px;padding:.4rem 1rem;font-size:.84rem;font-weight:700}
.about-diagram .checks span::before{content:"✓ ";}
.about-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2rem;box-shadow:0 16px 40px rgba(201,61,116,.08)}
@media(max-width:820px){.about-diagram{grid-template-columns:1fr}}

/* 商品ラインナップ */
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.product{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem;position:relative;overflow:hidden}
.product::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:linear-gradient(var(--pink-600),var(--gold))}
.product .code{font-family:var(--round);font-size:1.2rem;color:var(--pink-700);font-weight:700}
.product .alias{display:block;font-size:.8rem;color:var(--ink-400);margin-top:.2rem;margin-bottom:1rem}
.product dl{display:grid;grid-template-columns:auto 1fr;gap:.4rem 1rem;font-size:.86rem;margin-bottom:1rem}
.product dt{color:var(--pink-600);font-weight:700}
.product dd{color:var(--ink-900)}
.product ul{margin-top:.6rem}
.product li{font-size:.82rem;color:var(--ink-600);padding-left:1.1rem;position:relative;margin-bottom:.5rem}
.product li::before{content:"・";position:absolute;left:0;color:var(--pink-500)}
@media(max-width:900px){.products{grid-template-columns:1fr}}

/* ご利用シーン */
.scenes{display:flex;flex-wrap:wrap;gap:.7rem;justify-content:center}
.scene{background:var(--sky-050);color:var(--sky-700);border-radius:999px;padding:.55rem 1.3rem;font-size:.88rem;font-weight:700}

/* 料金テーブル */
.price-card{background:#fff;border:2px solid var(--pink-300);border-radius:var(--radius);padding:2rem;text-align:center;margin-bottom:1.6rem}
.price-card h3{font-family:var(--round);color:var(--pink-900);font-size:1.15rem;margin-bottom:.8rem}
.price-card .price{font-family:var(--round);font-size:clamp(1.4rem,3vw,1.9rem);color:var(--pink-600);font-weight:700;margin-bottom:1rem}
.price-card ul{max-width:620px;margin-inline:auto;text-align:left}
.price-card li{font-size:.86rem;color:var(--ink-600);padding-left:1.2rem;position:relative;margin-bottom:.5rem}
.price-card li::before{content:"・";position:absolute;left:0;color:var(--pink-500)}
.car-table,.table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.car-table th,.car-table td,.table th,.table td{text-align:left;padding:1rem 1.4rem;border-bottom:1px solid var(--line);font-size:.92rem;vertical-align:top}
.car-table tr:last-child td,.table tr:last-child td{border-bottom:0}
.car-table th,.table th{background:var(--pink-050);font-family:var(--round);color:var(--pink-900);font-weight:700}
.wholesale-note{background:var(--sky-050);color:var(--sky-700);border-radius:var(--radius);padding:1.2rem 1.6rem;font-size:.86rem;margin-top:1rem}

/* 特許 */
.patents{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.1rem}
.patent{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.patent .no{font-family:var(--round);color:var(--gold-dark);font-weight:700;font-size:.95rem}
.patent .region{font-size:.72rem;color:#fff;background:var(--gold);border-radius:999px;padding:.15rem .7rem;margin-left:.5rem}
.patent p{font-size:.86rem;color:var(--ink-600);margin-top:.6rem}

/* 試験結果 */
.tests{display:grid;gap:1.1rem}
.test{background:#fff;border:1px solid var(--line);border-left:5px solid var(--sky-600);border-radius:var(--radius);padding:1.5rem 1.8rem}
.test h3{font-family:var(--round);color:var(--sky-700);font-size:1.02rem;margin-bottom:.3rem}
.test .org{font-size:.76rem;color:var(--ink-400);margin-bottom:.7rem}
.test p{font-size:.9rem;color:var(--ink-700)}

/* 施工事例 */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 10px 26px rgba(201,61,116,.07)}
.case__img{aspect-ratio:4/3;overflow:hidden}
.case__img img{width:100%;height:100%;object-fit:cover}
.case__body{padding:1.4rem}
.case__body h3{font-family:var(--round);font-size:1rem;color:var(--pink-900);margin-bottom:.6rem}
.case__body p{font-size:.86rem;color:var(--ink-600)}
@media(max-width:900px){.cases{grid-template-columns:1fr}}

/* 会社概要テーブル */
.subhead{font-family:var(--round);font-size:1.3rem;color:var(--pink-900);font-weight:700;margin:0 0 1.4rem;padding-left:.9rem;border-left:4px solid var(--pink-500)}

/* CTA帯 */
.cta{background:linear-gradient(120deg,var(--pink-700),var(--pink-500));color:#fff;text-align:center}
.cta h2{font-family:var(--round);font-size:clamp(1.5rem,3.4vw,2.2rem);margin-bottom:1rem}
.cta p{color:#ffeaf2;margin-bottom:2rem}

/* 下層ページヘッダー */
.page-hero{padding:calc(var(--header-h) + 3.5rem) 0 3rem;background:linear-gradient(150deg,var(--pink-700),var(--pink-500));color:#fff;text-align:center}
.page-hero .en{font-size:.74rem;letter-spacing:.3em;color:#ffd6e6;font-weight:700}
.page-hero h1{font-family:var(--round);font-size:clamp(1.7rem,4.4vw,2.6rem);font-weight:700;margin-top:.6rem}
.breadcrumb{margin-top:1rem;font-size:.76rem;color:#ffe1ee}
.breadcrumb a:hover{color:#fff}.breadcrumb span{margin:0 .5rem;opacity:.6}

/* お問い合わせ */
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2.2rem;max-width:640px;margin-inline:auto}
.contact-card dl{display:grid;grid-template-columns:auto 1fr;gap:.9rem 1.4rem}
.contact-card dt{font-family:var(--round);color:var(--pink-600);font-size:.86rem}
.contact-card dd{color:var(--ink-900);font-size:.98rem}
.contact-card dd a{color:var(--pink-700);font-weight:700}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

/* フッター */
.footer{background:#3a1526;color:#e8c3d5;padding:clamp(2.5rem,5vw,4rem) 0 2rem;font-size:.88rem}
.footer__top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem;padding-bottom:2.2rem;border-bottom:1px solid rgba(255,255,255,.12)}
.footer__brand b{display:block;font-family:var(--round);color:#fff;font-size:1rem;margin-bottom:.8rem}
.footer__brand p{color:#d9a8c1;line-height:1.9}
.footer h4{font-family:var(--round);color:#fff;font-size:.82rem;letter-spacing:.1em;margin-bottom:1rem}
.footer li{margin-bottom:.65rem}
.footer a:hover{color:#fff}
.footer__bottom{padding-top:1.6rem;text-align:center;color:#a97b91;font-size:.8rem}

@media(max-width:900px){
  .footer__top{grid-template-columns:1fr;gap:1.6rem}
}
@media(max-width:720px){
  .nav{position:fixed;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;background:#fff;padding:.5rem 6%;transform:translateY(-130%);transition:transform .35s;box-shadow:0 20px 40px rgba(0,0,0,.12)}
  .nav.open{transform:translateY(0)}
  .nav a{width:100%;padding:1rem 0;border-bottom:1px solid var(--line)}
  .nav__cta{margin:.6rem 0}
  .nav-toggle{display:block}
  .stats{grid-template-columns:1fr}
}