@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@300;400;500&family=Noto+Sans+JP:wght@300;400;500;600&family=Zen+Old+Mincho:wght@400;500&display=swap');

/* ============================================================
   ISEKI TLS プロトタイプ v3
   参考サイト(yanmarmarche.com)を 1440px で実測し、構造・寸法・
   モーションを移植。色だけ ISEKI のブランド(シアン/井関ブルー)に差替。
   ============================================================ */
:root{
  --ink:#111;
  --white:#fff;
  --gray:#bebebe;      /* ラベルのピル・フッター背景(実測) */
  --hair:#d9d9d9;      /* 罫線(実測) */
  --pale:#f5f5f5;
  --accent:#00B9EF;    /* 現行ロゴのシアン。参考サイトの赤バーに相当 */
  --blue:#005BAB;      /* 井関農機コーポレートカラー。ドットのactive(参考の緑に相当) */
  --navy:#0A2B4C;
  --din:"Barlow","Helvetica Neue",Arial,sans-serif;          /* DIN Next 代替 */
  --sans:"Hiragino Sans","Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;
  --serif:"Zen Old Mincho","Hiragino Mincho ProN",serif;
  /* 実測イージング */
  --e-quart:cubic-bezier(.165,.84,.44,1);
  --e-quint:cubic-bezier(.23,1,.32,1);
  --e-expo:cubic-bezier(.19,1,.22,1);
  --pill-w:1280px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);color:var(--ink);background:var(--white);
  font-size:16px;line-height:1.6;letter-spacing:.04em;
  -webkit-font-smoothing:antialiased;font-feature-settings:"palt";
  overflow-x:hidden;
}
body.is-menu{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.din{font-family:var(--din)}

/* ====== 注記バー(プロトタイプであることの明示) ====== */
.proto-note{
  position:fixed;top:0;left:0;right:0;z-index:90;height:32px;
  display:flex;align-items:center;justify-content:center;
  background:var(--navy);color:rgba(255,255,255,.72);
  font-size:11px;letter-spacing:.05em;padding:0 16px;white-space:nowrap;overflow:hidden;
}

/* ====== ヘッダー: 浮遊するピル(実測 top32 / 1280x80 / radius40 / shadow 0 0 5px) ====== */
.header{position:fixed;top:calc(32px + 32px);left:0;right:0;z-index:80;padding:0 40px;pointer-events:none}
.header__wrap{
  position:relative;max-width:var(--pill-w);height:80px;margin:0 auto;
  background:var(--white);border-radius:40px;box-shadow:0 0 5px rgba(0,0,0,.2);
  display:flex;align-items:center;justify-content:space-between;
  pointer-events:auto;
  transition:background-color .45s var(--e-expo),box-shadow .45s var(--e-expo);
}
.header__logo{display:block;padding-left:40px}
.header__logo img{height:26px;width:auto}
.header__menu{
  width:80px;height:80px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  border-radius:0 40px 40px 0;transition:box-shadow .4s var(--e-expo);
}
.header__menu span{display:block;width:28px;height:2px;background:var(--ink);transition:transform .4s var(--e-expo),opacity .3s}
body.is-scrolled .header__wrap{background:transparent;box-shadow:none}
body.is-menu .header__wrap{background:transparent;box-shadow:none}
body.is-menu .header__menu span{background:var(--white)}
body.is-menu .header__menu span:nth-child(1){transform:translateY(10px) rotate(45deg)}
body.is-menu .header__menu span:nth-child(2){opacity:0}
body.is-menu .header__menu span:nth-child(3){transform:translateY(-10px) rotate(-45deg)}

/* ====== メニュー(参考サイトはPCでもハンバーガー) ====== */
.menu{
  position:fixed;inset:0;z-index:70;background:var(--navy);color:var(--white);
  opacity:0;visibility:hidden;transition:opacity .45s var(--e-expo),visibility 0s .45s;
  overflow:auto;
}
body.is-menu .menu{opacity:1;visibility:visible;transition:opacity .45s var(--e-expo)}
.menu__inner{max-width:1080px;margin:0 auto;padding:200px 40px 120px}
.menu__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:56px 40px}
.menu__group .en{font-family:var(--din);font-size:28px;font-weight:400;line-height:1;letter-spacing:.01em}
.menu__group .ja{display:block;font-size:12px;font-weight:500;letter-spacing:.14em;margin:10px 0 22px;color:rgba(255,255,255,.66)}
.menu__group ul{list-style:none}
.menu__group li{font-size:14px;font-weight:300;letter-spacing:.06em;line-height:2.3}
.menu__group li a{position:relative;transition:color .3s var(--e-quint)}
.menu__group li a:hover{color:var(--accent)}
.menu__tel{margin-top:72px;padding-top:40px;border-top:1px solid rgba(255,255,255,.18);display:flex;align-items:baseline;gap:28px}
.menu__tel .k{font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.66)}
.menu__tel .v{font-family:var(--din);font-size:34px;font-weight:400;letter-spacing:.02em}
.menu__tel .s{font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.66)}

/* ====== ヒーロー(実測 810px / 全面写真 / 中央ロゴ / ドット) ====== */
.hero{position:relative;height:90vh;min-height:640px;max-height:900px;overflow:hidden;background:#222}
.hero__track{position:absolute;inset:0;display:flex;transition:transform .8s var(--e-quart);will-change:transform}
.hero__slide{position:relative;flex:0 0 100%;height:100%}
.hero__slide img{width:100%;height:100%;object-fit:cover}
.hero__slide::after{content:"";position:absolute;inset:0;background:rgba(0,0,0,.08)}
.hero__logo{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;
  text-align:center;color:var(--white);text-shadow:0 2px 14px rgba(0,0,0,.28);white-space:nowrap;
}
.hero__logo .mark{display:block;font-family:var(--din);font-size:96px;font-weight:500;line-height:1;letter-spacing:.06em}
.hero__logo .rule{display:block;width:44px;height:2px;background:var(--white);margin:18px auto 16px}
.hero__logo .sub{display:block;font-family:var(--din);font-size:17px;font-weight:400;letter-spacing:.38em;text-indent:.38em}
.hero__logo .ja{display:block;font-size:12px;font-weight:500;letter-spacing:.24em;text-indent:.24em;margin-top:14px;opacity:.9}
.dots{display:flex;justify-content:center;gap:10px}
.dots button{
  width:8px;height:8px;border-radius:50%;padding:0;background:var(--white);opacity:.5;
  transition:opacity .3s var(--e-quint),transform .3s var(--e-quint),background-color .3s var(--e-quint);
}
.dots button:hover{transform:scale3d(1.14,1.14,1.14)}
.dots button.is-active{opacity:1;background:var(--blue)}
.hero .dots{position:absolute;left:0;right:0;bottom:44px;z-index:2}

/* ====== NEWS(実測: 768px列 / pt130 pb140) ====== */
.news{width:768px;max-width:calc(100% - 80px);margin:0 auto;padding:130px 0 140px}
.title-inline{display:flex;align-items:baseline;gap:22px;margin-bottom:34px}
.title-inline .en{font-family:var(--din);font-size:60px;font-weight:400;line-height:1;letter-spacing:.005em}
.title-inline .ja{font-size:18px;font-weight:500;letter-spacing:.04em}
.newsList{list-style:none;border-bottom:1px solid var(--hair)}
.newsList li{border-top:1px solid var(--hair)}
.newsList a{display:block;padding:26px 8px 24px;transition:opacity .3s var(--e-quint)}
.newsList a:hover{opacity:.55}
.newsList__head{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.newsList__date{font-size:13px;font-weight:300;letter-spacing:.04em}
.newsList__cat{
  display:inline-block;padding:0 12px;border-radius:11px;height:22px;line-height:22px;
  background:var(--gray);color:var(--white);font-size:10px;font-weight:500;letter-spacing:.04em;
}
.newsList__cat.is-rice{background:var(--blue)}
.newsList__cat.is-life{background:#5F9E3C}
.newsList__cat.is-hoken{background:#8A6D3B}
.newsList__text{font-size:14px;font-weight:300;line-height:1.8;letter-spacing:.045em}
.more-link{
  display:inline-block;font-family:var(--din);font-size:18px;font-weight:300;line-height:1;letter-spacing:.02em;
  text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px;
  transition:opacity .3s var(--e-quint);
}
.more-link:hover{opacity:.5}
.news__action{text-align:right;margin-top:26px}

/* ====== CONCEPT(実測: 動画背景 560px / 白文字 22px lh44 / mb160) ====== */
.concept{position:relative;height:560px;margin-bottom:160px;overflow:hidden;background:#333;color:var(--white)}
.concept video,.concept .concept__poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.concept::before{content:"";position:absolute;inset:0;background:rgba(0,0,0,.28);z-index:1}
.concept__inner{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0 40px}
.concept__title{font-family:var(--serif);font-weight:400;font-size:44px;letter-spacing:.32em;text-indent:.32em;line-height:1.4;margin-bottom:30px}
.concept__detail{font-size:22px;font-weight:500;line-height:2;letter-spacing:.04em;max-width:34em}
.concept .more-link{margin-top:40px;letter-spacing:.06em}

/* ====== 事業(実測: 見出し96/34 / バナー1268x480 / 左右交互の非対称) ====== */
.project{margin-bottom:170px}
.project__head{padding:0 105px;margin-bottom:36px}
.project--r .project__head{text-align:right}
.project__title{display:inline-block;text-align:inherit}
.project__en{font-family:var(--din);font-size:96px;font-weight:400;line-height:1;letter-spacing:.005em;display:block}
.project__ja{display:inline-flex;align-items:center;gap:24px;margin-top:22px;font-size:34px;font-weight:500;letter-spacing:.4em;line-height:1.3}
.project__ja::after,.project__ja::before{content:"";width:40px;height:3px;background:var(--accent);flex:none}
.project--r .project__ja::before{display:none}
.project--l .project__ja::after{display:none}
.project--l .project__ja{letter-spacing:.4em}
.project__body{display:block;position:relative;width:min(1268px,calc(100% - 15px));height:480px;overflow:hidden}
.project--r .project__body{margin-left:auto;margin-right:15px}
.project--l .project__body{margin-right:auto;margin-left:0}
.project__body img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--e-quart)}
.project__body:hover img{transform:scale3d(1.04,1.04,1)}
.project__more{
  position:absolute;bottom:0;width:298px;height:73px;background:var(--white);
  display:flex;align-items:center;gap:26px;padding-left:50px;
  font-family:var(--din);font-size:38px;font-weight:300;line-height:1;letter-spacing:.01em;color:var(--ink);
}
.project--r .project__more{left:0}
.project--l .project__more{right:0}
.arrow-long{width:104px;height:12px;flex:none;fill:none;stroke:var(--ink);stroke-width:1.5}
.project__more .arrow-long{transition:transform .45s var(--e-expo)}
.project__body:hover .project__more .arrow-long{transform:translateX(8px)}

/* 関連(実測: ラベル14px / カード346x195 ピッチ370 / 名前16px w500 / ドット) */
.related{margin-top:60px}
.related__label{text-align:center;font-size:14px;font-weight:500;letter-spacing:.06em;margin-bottom:28px}
.related__viewport{overflow:hidden;width:100%}
.related__track{display:flex;gap:24px;transition:transform .8s var(--e-quart);will-change:transform}
.related__item{flex:0 0 346px}
.related__figure{width:346px;height:195px;overflow:hidden;background:var(--pale)}
.related__figure img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--e-quart)}
.related__item:hover img{transform:scale3d(1.06,1.06,1)}
.related__name{margin-top:14px;font-size:16px;font-weight:500;letter-spacing:.04em;line-height:1.5}
.related .dots{margin-top:30px}
.related .dots button{background:var(--ink);opacity:.2}
.related .dots button.is-active{background:var(--blue);opacity:1}

/* ====== 下部カード(実測: コンテナ1080 / 540x440 x2 + 360x440 x3 / 白パネルが左下に重なる) ====== */
.cards{max-width:1080px;margin:0 auto;padding:80px 0 0}
.cards__row{display:grid;gap:0}
.cards__row--2{grid-template-columns:1fr 1fr;margin-bottom:120px}
.cards__row--3{grid-template-columns:1fr 1fr 1fr;margin-bottom:154px}
.card{position:relative;height:440px;overflow:hidden;display:block}
.card img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--e-quart)}
.card:hover img{transform:scale3d(1.05,1.05,1)}
.card__panel{
  position:absolute;left:0;bottom:0;background:var(--white);width:300px;
  display:flex;align-items:center;justify-content:space-between;padding:0 24px 0 26px;
}
.cards__row--2 .card__panel{height:130px}
.cards__row--3 .card__panel{height:75px}
.card__en{font-family:var(--din);font-weight:400;line-height:1.05;letter-spacing:.005em}
.cards__row--2 .card__en{font-size:32px}
.cards__row--3 .card__en{font-size:30px}
.card__ja{font-size:12px;font-weight:500;letter-spacing:.06em;margin-top:6px}
.cards__row--3 .card__ja{display:inline;margin:0 0 0 10px;vertical-align:4px}
.circ{
  width:36px;height:36px;border-radius:50%;border:1.5px solid var(--ink);flex:none;
  display:flex;align-items:center;justify-content:center;
  transition:background-color .45s var(--e-expo),transform .45s var(--e-expo);
}
.circ svg{width:14px;height:10px;fill:none;stroke:var(--ink);stroke-width:1.5;transition:stroke .3s var(--e-quint)}
.card:hover .circ{background:var(--ink);transform:scale3d(1.1,1.1,1)}
.card:hover .circ svg{stroke:var(--white)}

/* ====== フッター(実測: #bebebe / PAGE TOP / 5列 / ロゴ左下) ====== */
.footer{background:#B9C2CA;color:var(--white)}
.footer__inner{max-width:1286px;margin:0 auto;padding:0 40px 40px}
.footer__top{display:flex;flex-direction:column;align-items:center;padding:28px 0 22px;border-bottom:1px solid rgba(255,255,255,.55);font-size:12px;letter-spacing:.16em;font-weight:300}
.footer__top svg{width:14px;height:8px;margin-bottom:8px;fill:none;stroke:var(--white);stroke-width:1.2}
.footer__nav{display:grid;grid-template-columns:repeat(5,auto);justify-content:start;gap:0 60px;padding:48px 44px 0}
.footer__group{min-width:120px}
.footer__group h3{font-size:18px;font-weight:600;letter-spacing:.04em;line-height:1.5;margin-bottom:12px}
.footer__group h3+h3{margin-top:20px}
.footer__group ul{list-style:none;margin-bottom:22px}
.footer__group li{font-size:12px;font-weight:300;letter-spacing:.05em;line-height:2.15}
.footer__group a{transition:opacity .3s var(--e-quint)}
.footer__group a:hover{opacity:.6}
.footer__bottom{display:flex;align-items:flex-end;justify-content:space-between;margin-top:56px}
.footer__logo img{height:38px;width:auto}
.footer__copy{font-family:var(--din);font-size:10px;font-weight:300;letter-spacing:.04em;margin-top:12px}
.footer__links{display:flex;gap:32px;font-size:12px;font-weight:300;letter-spacing:.04em}

/* ====== 下層ページ ====== */
.page-head{padding:200px 105px 0}
.page-head .project__en{font-size:84px}
.page-head .project__ja{font-size:28px;margin-top:18px}
.crumb{padding:34px 105px 0;font-size:12px;font-weight:300;letter-spacing:.06em;color:#666}
.crumb a:hover{text-decoration:underline}
.crumb span{margin:0 10px}
.sec{padding:130px 0}
.wrap{max-width:1080px;margin:0 auto;padding:0 40px}
.wrap-w{max-width:1268px;margin:0 auto;padding:0 40px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.lead-t{font-family:var(--serif);font-size:34px;font-weight:400;letter-spacing:.14em;line-height:1.7;margin-bottom:28px}
.lead-p{font-size:15px;font-weight:300;line-height:2.1;letter-spacing:.05em;color:#333}
.fig{overflow:hidden}
.fig img{width:100%;height:auto;transition:transform .8s var(--e-quart)}
.fig:hover img{transform:scale3d(1.04,1.04,1)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:40px 24px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:40px 24px}
.tile figure{aspect-ratio:346/195;overflow:hidden;background:var(--pale)}
.tile figure img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--e-quart)}
.tile:hover figure img{transform:scale3d(1.06,1.06,1)}
.tile h4{font-size:16px;font-weight:500;letter-spacing:.04em;margin-top:14px}
.tile p{font-size:13px;font-weight:300;line-height:1.85;letter-spacing:.04em;color:#444;margin-top:6px}
.tbl{width:100%;border-collapse:collapse;font-size:13.5px;letter-spacing:.03em}
.tbl th{font-weight:500;text-align:left;padding:14px 12px;border-bottom:1px solid var(--ink);font-size:12px;letter-spacing:.1em}
.tbl td{padding:16px 12px;border-bottom:1px solid var(--hair);font-weight:300}
.tbl td.din{font-weight:400;font-size:15px}
.pill{display:inline-block;padding:0 12px;height:24px;line-height:24px;border-radius:12px;border:1px solid var(--ink);font-size:11px;letter-spacing:.06em;font-weight:500;margin-right:6px;transition:background-color .3s var(--e-quint),color .3s var(--e-quint)}
.pill:hover{background:var(--ink);color:var(--white)}
.contact-band{background:var(--pale);padding:96px 40px;text-align:center}
.contact-band .k{font-size:13px;font-weight:500;letter-spacing:.14em;margin-bottom:14px}
.contact-band .tel{font-family:var(--din);font-size:52px;font-weight:400;line-height:1;letter-spacing:.01em}
.contact-band .s{font-size:12px;font-weight:300;letter-spacing:.06em;color:#555;margin-top:12px}
.btn{
  display:inline-flex;align-items:center;gap:18px;margin-top:34px;padding:0 34px;height:60px;border-radius:30px;
  background:var(--ink);color:var(--white);font-size:14px;font-weight:500;letter-spacing:.08em;
  transition:background-color .45s var(--e-expo),box-shadow .45s var(--e-expo),transform .45s var(--e-expo);
}
.btn:hover{background:var(--blue);box-shadow:0 10px 24px rgba(0,91,171,.28);transform:translateY(-2px)}
.btn svg{width:22px;height:10px;fill:none;stroke:var(--white);stroke-width:1.5}
.step{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s}
.step li{list-style:none;padding:28px 26px 30px;border:1px solid var(--hair);position:relative}
.step li::before{counter-increment:s;content:"0" counter(s);font-family:var(--din);font-size:44px;font-weight:300;line-height:1;color:var(--accent);display:block;margin-bottom:16px}
.step h4{font-size:16px;font-weight:500;letter-spacing:.05em;margin-bottom:8px}
.step p{font-size:13px;font-weight:300;line-height:1.85;letter-spacing:.04em;color:#444}

/* ====== responsive ====== */
@media(max-width:1200px){
  .project__head{padding:0 6vw}
  .project__en{font-size:clamp(48px,7vw,96px)}
  .project__ja{font-size:clamp(20px,2.4vw,34px)}
  .page-head{padding:180px 6vw 0}.crumb{padding:30px 6vw 0}
}
@media(max-width:900px){
  .proto-note{height:auto;min-height:32px;white-space:normal;font-size:10px;line-height:1.45;padding:6px 14px;text-align:center}
  .header{padding:0 16px;top:calc(46px + 12px)}
  .footer__links{flex-wrap:wrap;gap:12px 24px}
  .header__wrap{height:64px;border-radius:32px}
  .header__logo{padding-left:24px}.header__logo img{height:22px}
  .header__menu{width:64px;height:64px}
  .menu__inner{padding:140px 28px 80px}.menu__grid{grid-template-columns:1fr 1fr;gap:36px 24px}
  .hero{height:72vh;min-height:520px}.hero__logo .mark{font-size:56px}.hero__logo .sub{font-size:12px}
  .news{padding:90px 0 100px}.title-inline .en{font-size:44px}
  .concept{height:480px;margin-bottom:100px}.concept__title{font-size:28px;letter-spacing:.2em;text-indent:.2em}.concept__detail{font-size:16px;line-height:1.9}
  .project{margin-bottom:110px}.project__body{height:56vw;width:calc(100% - 8px)}
  .project__more{width:220px;height:58px;font-size:28px;padding-left:28px;gap:16px}.arrow-long{width:70px}
  .related__item{flex:0 0 260px}.related__figure{width:260px;height:146px}.related__track{gap:16px}
  .cards{padding:60px 20px 0}.cards__row--2,.cards__row--3{grid-template-columns:1fr;margin-bottom:0}
  .card{height:300px;margin-bottom:24px}.cards__row--2 .card__panel,.cards__row--3 .card__panel{height:84px;width:260px}
  .cards__row--2 .card__en,.cards__row--3 .card__en{font-size:26px}.cards__row--3 .card__ja{display:block;margin:4px 0 0;vertical-align:0}
  .cards__row--3{margin-bottom:80px}
  .footer__nav{grid-template-columns:1fr 1fr;gap:20px 24px;padding:36px 0 0}.footer__bottom{flex-direction:column;align-items:flex-start;gap:24px}
  .two,.grid3,.grid4,.step{grid-template-columns:1fr}.sec{padding:80px 0}
  .page-head .project__en{font-size:48px}.page-head .project__ja{font-size:20px}
  .contact-band .tel{font-size:38px}
}