/* ===== Base ===== */
:root{
  --blue:#0b76b8;        /* アクセントブルー（見出し） */
  --navy:#1f3a52;        /* ヘッダー・ロゴ帯 */
  --dark:#222;
  --gray:#666;
  --line:#e3e6ea;
  --bg-soft:#f5f7f9;
  --max:1100px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans JP",sans-serif;
  color:var(--dark);
  line-height:1.8;
  font-size:15px;
  background:#fff;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ===== Header ===== */
.header{
  position:fixed;top:0;left:0;width:100%;z-index:100;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
}
.header__inner{
  max-width:var(--max);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;height:64px;
}
.logo{
  font-weight:700;font-size:20px;letter-spacing:.08em;
  background:var(--navy);color:#fff;padding:8px 16px;border-radius:3px;
}
.nav{display:flex;gap:28px}
.nav a{font-size:14px;font-weight:500;position:relative;padding:4px 0;transition:color .2s}
.nav a:hover{color:var(--blue)}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--blue);transition:width .25s}
.nav a:hover::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--navy);transition:.3s}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  text-align:center;color:#fff;overflow:hidden;
}
.hero__bg{
  position:absolute;inset:0;
  background:#36506b url("images/hero.jpg") center/cover no-repeat;
}
.hero__overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,35,50,.55),rgba(20,35,50,.65))}
.hero__content{position:relative;z-index:2;padding:0 24px;max-width:860px}
.hero__title{
  font-size:clamp(40px,8vw,76px);font-weight:700;letter-spacing:.1em;
  margin-bottom:28px;text-shadow:0 2px 14px rgba(0,0,0,.4);
}
.hero__lead{font-size:clamp(14px,2.4vw,16px);line-height:2.1;text-shadow:0 1px 8px rgba(0,0,0,.5)}
.hero__btn{
  display:inline-block;margin-top:36px;
  border:1px solid #fff;color:#fff;
  padding:14px 44px;font-size:14px;letter-spacing:.1em;
  border-radius:3px;transition:.25s;
}
.hero__btn:hover{background:#fff;color:var(--navy)}

/* ===== Section common ===== */
.section{max-width:var(--max);margin:0 auto;padding:88px 24px}
.section__head{text-align:center;margin-bottom:48px}
.en-head{
  font-family:"Oswald",sans-serif;color:var(--blue);
  font-size:38px;letter-spacing:.06em;line-height:1.2;
}
.ja-head{font-size:14px;color:var(--gray);margin-top:6px;letter-spacing:.1em}

/* ===== Service intro ===== */
.service-intro__text{text-align:center;color:#444}

/* ===== Cards ===== */
.cards-section{padding-top:0}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;
  display:flex;flex-direction:column;transition:.25s;
}
.card:hover{box-shadow:0 12px 30px rgba(0,0,0,.10);transform:translateY(-4px)}
.card__img{
  aspect-ratio:16/9;
  background:#dfe6ec url("images/card-about.jpg") center/cover no-repeat;
}
.card:nth-child(2) .card__img{background-image:url("images/card-service.jpg")}
.card:nth-child(3) .card__img{background-image:url("images/card-faq.jpg")}
.card:nth-child(4) .card__img{background-image:url("images/card-contact.jpg")}
.card__body{padding:24px;flex:1;display:flex;flex-direction:column}
.card__title{font-size:20px;font-weight:700;margin-bottom:14px}
.card__title span{display:block;font-size:12px;color:var(--blue);font-weight:500;margin-top:4px}
.card__body p{font-size:14px;color:#555;flex:1}
.card__more{margin-top:16px;font-size:13px;color:var(--blue);font-weight:500}

/* ===== About ===== */
.about{background:var(--bg-soft);max-width:none}
.about>.section__head,.about__inner{max-width:var(--max);margin-left:auto;margin-right:auto}
.about__inner{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;align-items:center;padding:0 24px}
.about__img{aspect-ratio:4/3;background:#cfd8df url("images/about.jpg") center/cover no-repeat;border-radius:6px}
.about__table{width:100%;border-collapse:collapse;font-size:14px}
.about__table th,.about__table td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.about__table th{width:110px;color:var(--navy);font-weight:700;white-space:nowrap}

/* ===== Works ===== */
.works{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.work{text-align:center;padding:36px 24px;border:1px solid var(--line);border-radius:6px;transition:.25s}
.work:hover{border-color:var(--blue);box-shadow:0 8px 24px rgba(11,118,184,.08)}
.work__icon{font-size:40px;margin-bottom:16px}
.work h3{font-size:18px;margin-bottom:12px;color:var(--navy)}
.work p{font-size:14px;color:#555}

/* ===== FAQ ===== */
.faq__list{max-width:780px;margin:0 auto}
.faq__item{border-bottom:1px solid var(--line)}
.faq__item summary{
  cursor:pointer;list-style:none;padding:20px 40px 20px 12px;position:relative;
  font-weight:500;font-size:15px;
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::before{content:"Q";color:var(--blue);font-weight:700;margin-right:12px}
.faq__item summary::after{content:"+";position:absolute;right:12px;top:18px;font-size:22px;color:var(--gray);transition:.2s}
.faq__item[open] summary::after{content:"−"}
.faq__item p{padding:0 12px 22px 36px;color:#555;font-size:14px}

/* ===== News ===== */
.news__list{max-width:780px;margin:0 auto;border:1px solid var(--line);border-radius:6px}
.news__item{display:flex;gap:24px;padding:20px 24px;align-items:center}
.news__item+.news__item{border-top:1px solid var(--line)}
.news__item time{color:var(--gray);font-size:13px;white-space:nowrap}
.news__item span{font-size:15px}

/* ===== Contact ===== */
.contact{text-align:center}
.contact__text{color:#555;margin-bottom:36px}
.contact__box{
  max-width:560px;margin:0 auto;background:var(--bg-soft);
  border:1px solid var(--line);border-radius:8px;padding:40px 24px;text-align:center;
}
.contact__tel-label{font-size:13px;color:var(--gray)}
.contact__tel{font-family:"Oswald",sans-serif;font-size:40px;color:var(--navy);letter-spacing:.04em;margin:6px 0}
.contact__mail{font-family:"Oswald",sans-serif;font-size:clamp(18px,4.2vw,28px);color:var(--navy);letter-spacing:.02em;margin:6px 0;word-break:break-all}
.contact__hours{font-size:13px;color:var(--gray);margin-bottom:24px}
.contact__btn{
  display:inline-block;background:var(--blue);color:#fff;
  padding:15px 50px;border-radius:4px;font-size:15px;letter-spacing:.06em;transition:.2s;
}
.contact__btn:hover{background:#095e93}

/* ===== Footer ===== */
.footer{background:var(--navy);color:#fff;text-align:center;padding:56px 24px 32px;position:relative}
.footer__top{
  position:absolute;top:-22px;left:50%;transform:translateX(-50%);
  width:44px;height:44px;line-height:40px;font-size:22px;
  background:var(--blue);border-radius:50%;color:#fff;
}
.footer__logo{font-size:24px;font-weight:700;letter-spacing:.1em;margin-bottom:20px}
.footer__nav{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:24px}
.footer__nav a{font-size:13px;opacity:.85;transition:.2s}
.footer__nav a:hover{opacity:1;color:#9ed1f0}
.footer__copy{font-size:12px;opacity:.6}

/* ===== Responsive ===== */
@media(max-width:768px){
  .nav{
    position:fixed;top:64px;right:0;width:70%;height:calc(100vh - 64px);
    background:#fff;flex-direction:column;gap:0;padding:20px 0;
    transform:translateX(100%);transition:transform .3s;box-shadow:-4px 0 16px rgba(0,0,0,.1);
  }
  .nav.open{transform:translateX(0)}
  .nav a{padding:16px 28px;border-bottom:1px solid var(--line)}
  .nav-toggle{display:flex}
  .cards{grid-template-columns:1fr}
  .about__inner{grid-template-columns:1fr}
  .works{grid-template-columns:1fr}
  .section{padding:64px 20px}
  .en-head{font-size:30px}
}

/* =======================================================
   下層ページ用
======================================================= */
body.subpage{padding-top:64px}

/* ページ見出しバナー */
.page-hero{
  position:relative;height:240px;
  background:#36506b url("images/page-header.jpg") center/cover no-repeat;
  display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;
}
.page-hero::before{content:"";position:absolute;inset:0;background:rgba(20,35,50,.6)}
.page-hero__inner{position:relative;z-index:2}
.page-hero__en{font-family:"Oswald",sans-serif;font-size:clamp(30px,6vw,46px);letter-spacing:.08em;line-height:1.1}
.page-hero__ja{font-size:14px;letter-spacing:.1em;margin-top:8px;opacity:.9}

/* パンくず */
.breadcrumb{max-width:var(--max);margin:0 auto;padding:18px 24px;font-size:12px;color:var(--gray)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb span{margin:0 8px;opacity:.6}

/* 共通リード */
.lead{max-width:780px;margin:0 auto 56px;text-align:center;color:#444}

/* 代表挨拶 */
.greeting{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:center;margin-bottom:72px}
.greeting__img{aspect-ratio:4/3;background:#cfd8df url("images/greeting.jpg") center/cover no-repeat;border-radius:6px}
.greeting h3{font-size:22px;color:var(--navy);margin-bottom:20px;line-height:1.5}
.greeting p{font-size:14px;color:#555;margin-bottom:16px}
.greeting__sign{text-align:right;font-size:14px;color:var(--navy);font-weight:700;margin-top:24px}

/* アクセス（地図） */
.access__map{aspect-ratio:16/7;background:#e3e6ea;border-radius:6px;display:flex;align-items:center;justify-content:center;color:var(--gray);font-size:14px}

/* サービス詳細ブロック */
.service-block{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:56px}
.service-block:nth-of-type(even) .service-block__img{order:2}
.service-block__img{aspect-ratio:4/3;background:#cfd8df center/cover no-repeat;border-radius:6px}
.service-block:nth-of-type(1) .service-block__img{background-image:url("images/service-01.jpg")}
.service-block:nth-of-type(2) .service-block__img{background-image:url("images/service-02.jpg")}
.service-block:nth-of-type(3) .service-block__img{background-image:url("images/service-03.jpg")}
.service-block h3{font-size:22px;color:var(--navy);margin-bottom:8px}
.service-block .en-label{font-family:"Oswald",sans-serif;color:var(--blue);font-size:14px;letter-spacing:.1em;display:block;margin-bottom:4px}
.service-block p{font-size:14px;color:#555;margin-bottom:10px}
.service-block ul{list-style:none;font-size:14px}
.service-block ul li{padding-left:20px;position:relative;margin-bottom:6px;color:#444}
.service-block ul li::before{content:"●";color:var(--blue);font-size:9px;position:absolute;left:0;top:5px}

/* 施工の流れ */
.flow{max-width:760px;margin:0 auto;counter-reset:flow}
.flow__step{position:relative;padding:0 0 36px 76px}
.flow__step::before{
  counter-increment:flow;content:counter(flow,decimal-leading-zero);
  position:absolute;left:0;top:0;width:52px;height:52px;line-height:52px;text-align:center;
  background:var(--blue);color:#fff;border-radius:50%;font-family:"Oswald",sans-serif;font-size:18px;
}
.flow__step::after{content:"";position:absolute;left:26px;top:52px;bottom:0;width:2px;background:var(--line)}
.flow__step:last-child{padding-bottom:0}
.flow__step:last-child::after{display:none}
.flow__step h4{font-size:17px;color:var(--navy);margin-bottom:6px;padding-top:12px}
.flow__step p{font-size:14px;color:#555}

/* FAQ カテゴリ */
.faq-cat{max-width:820px;margin:0 auto 48px}
.faq-cat__title{font-size:18px;color:var(--navy);font-weight:700;padding-bottom:10px;border-bottom:2px solid var(--blue);margin-bottom:8px}

/* お問い合わせフォーム */
.form{max-width:680px;margin:0 auto}
.form__row{margin-bottom:22px}
.form__row label{display:block;font-size:14px;font-weight:500;margin-bottom:8px}
.form__row label .req{color:#d23;font-size:12px;margin-left:8px}
.form__row input,.form__row textarea,.form__row select{
  width:100%;padding:13px 14px;border:1px solid #cdd4da;border-radius:4px;
  font-size:15px;font-family:inherit;background:#fff;transition:.2s;
}
.form__row input:focus,.form__row textarea:focus,.form__row select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(11,118,184,.12)}
.form__row textarea{min-height:140px;resize:vertical}
.form__submit{text-align:center;margin-top:32px}
.form__submit button{
  background:var(--blue);color:#fff;border:none;cursor:pointer;
  padding:16px 64px;font-size:16px;letter-spacing:.06em;border-radius:4px;transition:.2s;font-family:inherit;
}
.form__submit button:hover{background:#095e93}
.form__note{text-align:center;font-size:13px;color:var(--gray);margin-top:16px}

@media(max-width:768px){
  .greeting,.service-block,.service-block:nth-child(even) .service-block__img{grid-template-columns:1fr;order:0}
  .service-block__img{order:0!important}
  .flow__step{padding-left:64px}
}