*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --yellow:#FFFFA3;
  --ink:#18191C;
  --mid:#404348;
  --soft:#888B90;
  --rule:#E8E8E6;
  --bg:#F8F8F6;
  --cream:#FAFAF7;
  --white:#FFFFFF;
}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans JP',sans-serif;color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;width:100%;height:100%;object-fit:cover}
a{text-decoration:none;color:inherit}
ul{list-style:none}

/* ======= HEADER ======= */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
.header-inner{
  max-width:1200px;margin:0 auto;padding:0 48px;
  height:72px;display:flex;align-items:center;justify-content:space-between;
}
.logo{display:flex;flex-direction:column;gap:0}
.logo-main{
  font-family:'DM Sans',sans-serif;
  font-size:20px;font-weight:500;letter-spacing:.2em;color:var(--ink);
}
.logo-sub{font-size:8.5px;letter-spacing:.22em;color:var(--soft);text-transform:uppercase;margin-top:1px}
.nav-list{display:flex;gap:32px;align-items:center}
.nav-link{
  font-family:'DM Sans',sans-serif;
  font-size:13px;font-weight:400;color:var(--soft);letter-spacing:.06em;
  transition:color .2s;
  position:relative;
}
.nav-link::after{
  content:'';
  position:absolute;bottom:-4px;left:0;right:0;
  height:1.5px;background:rgba(195, 144, 0, 0.54);
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink)}
.nav-cta{
  font-family:'DM Sans',sans-serif;
  background:rgba(195, 144, 0, 0.54);color:var(--white);
  font-size:12px;font-weight:500;letter-spacing:.1em;
  padding:10px 24px;
  transition:opacity .2s;
}
.nav-cta:hover{opacity:.85}

/* ======= HAMBURGER ======= */
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.hamburger span{display:block;width:22px;height:1.5px;background:var(--ink);transition:transform .3s,opacity .3s}
.hamburger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ======= HERO ======= */
.hero{
  display:grid;grid-template-columns:45% 55%;
  min-height:100vh;padding-top:72px;
}
.hero-left{
  background:var(--cream);
  display:flex;flex-direction:column;justify-content:center;
  padding:80px 64px 80px max(64px,calc((100vw - 1200px)/2 + 48px));
}
.hero-kicker{
  font-family:'DM Sans',sans-serif;
  font-size:10px;font-weight:400;letter-spacing:.28em;
  text-transform:uppercase;color:var(--soft);
  margin-bottom:28px;
  display:flex;align-items:center;gap:12px;
}
.hero-kicker::before{content:'';width:20px;height:1px;background:var(--soft)}
.hero-h1{
  font-family:'Playfair Display',serif;
  font-size:clamp(36px,4vw,45px);font-weight:700;
  line-height:1.15;color:var(--ink);
  margin-bottom:24px;letter-spacing:.01em;
}
.hero-h1 span{
  display:block;
  color:var(--soft);font-weight:400;font-size:.75em;
  margin-top:6px;letter-spacing:.02em;
}
.hero-body{
  font-size:14px;line-height:1.95;color:var(--soft);
  max-width:380px;margin-bottom:40px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:48px}
.btn-filled{
  background:var(--ink);color:var(--white);
  font-family:'DM Sans',sans-serif;
  font-size:12.5px;font-weight:500;letter-spacing:.08em;
  padding:13px 30px;transition:background .2s;
}
.btn-filled:hover{background:var(--mid)}
.btn-text{
  font-family:'DM Sans',sans-serif;
  font-size:12.5px;font-weight:400;letter-spacing:.06em;
  color:var(--soft);padding:13px 4px;
  border-bottom:1px solid var(--rule);
  transition:color .2s,border-color .2s;
}
.btn-text:hover{color:var(--ink);border-color:var(--ink)}
.hero-trust{display:flex;gap:24px;flex-wrap:wrap}
.hero-trust-item{
  display:flex;align-items:center;gap:8px;
  font-size:11.5px;color:var(--soft);letter-spacing:.04em;
}
.hero-trust-dot{
  width:4px;height:4px;border-radius:50%;
  background:rgba(195, 144, 0, 0.54);flex-shrink:0;
}
.hero-right{position:relative;overflow:hidden}
.hero-right img{position:absolute;inset:0}
.hero-tag{
  position:absolute;bottom:0;right:0;z-index:2;
  background:var(--white);
  padding:18px 24px;
}
.hero-tag-num{
  font-family:'Playfair Display',serif;
  font-size:28px;font-weight:700;color:var(--ink);line-height:1;
}
.hero-tag-label{font-size:10px;color:var(--soft);letter-spacing:.1em;margin-top:4px}

/* ======= SECTION ======= */
.section{padding:96px 0}
.section.cream{background:var(--cream)}
.section.bg{background:var(--bg)}
.inner{max-width:1200px;margin:0 auto;padding:0 48px}
.sec-head{text-align:center;margin-bottom:64px}
.sec-kicker{
  font-family:'DM Sans',sans-serif;
  font-size:10px;font-weight:400;letter-spacing:.28em;
  text-transform:uppercase;color:var(--soft);
  margin-bottom:12px;
  display:flex;align-items:center;justify-content:center;gap:12px;
}
.sec-kicker::before,.sec-kicker::after{content:'';flex:0 0 20px;height:1px;background:var(--soft)}
.sec-title{
  font-family:'Playfair Display',serif;
  font-size:clamp(26px,2.8vw,36px);font-weight:700;
  color:var(--ink);line-height:1.2;letter-spacing:.01em;
}

/* ======= STRENGTHS ======= */
.strengths-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:40px;
}
.strength-card{
  padding:44px 32px 40px;
  background:var(--white);
  border:1px solid var(--rule);
  position:relative;
  overflow:hidden;
  transition:box-shadow .3s,transform .3s;
}
.strength-card:hover{box-shadow:0 8px 40px rgba(0,0,0,.06);transform:translateY(-4px)}
.strength-card::after{
  content:'';
  position:absolute;bottom:0;left:0;right:0;
  height:3px;background:rgba(195, 144, 0, 0.54);
}
.sc-icon{
  width:52px;height:52px;
  background:rgba(195, 144, 0, 0.54);
  border-radius:50%;
  margin:0 auto 20px;
  display:flex;align-items:center;justify-content:center;
}
.sc-icon-inner{
  width:20px;height:20px;
  background:var(--ink);
  border-radius:2px;
  opacity:.5;
}

.strength-card .sc{
  display:block;
  font-family:'Playfair Display',serif;
  font-size:3.6rem;
  line-height:1;
  color:rgba(195, 144, 0, 0.54);
  margin-bottom:20px;
}

.sc-title{
  font-family:'Playfair Display',serif;
  font-size:17px;font-weight:700;margin-bottom:14px;color:var(--ink);line-height:1.4;
}
.sc-desc{font-size:13px;color:var(--soft);line-height:1.85}

/* ======= ABOUT (YSKについて) ======= */
.about-grid{
  display:grid;grid-template-columns:1fr 1fr;
  gap:80px;align-items:center;
  margin-bottom:56px;
}
.about-kicker{
  font-family:'DM Sans',sans-serif;
  font-size:10px;font-weight:400;letter-spacing:.28em;
  text-transform:uppercase;color:var(--soft);
  display:flex;align-items:center;gap:12px;
  margin-bottom:20px;
}
.about-kicker::before{content:'';width:20px;height:1px;background:var(--soft)}
.about-h2{
  font-family:'Playfair Display',serif;
  font-size:clamp(24px,2.5vw,32px);font-weight:700;
  line-height:1.25;color:var(--ink);
  margin-bottom:20px;letter-spacing:.01em;
}
.about-lead{
  font-size:13.5px;line-height:1.95;color:var(--soft);
  margin-bottom:32px;
}
.about-more{
  font-family:'DM Sans',sans-serif;
  font-size:12px;font-weight:500;letter-spacing:.08em;
  color:var(--ink);
  display:inline-flex;align-items:center;gap:8px;
  border-bottom:1px solid var(--ink);padding-bottom:2px;
  transition:gap .2s;
}
.about-more:hover{gap:14px}
.about-stats{
  display:grid;grid-template-columns:1fr 1fr;
  gap:2px;
}
.about-stat{
  background:var(--white);
  border:1px solid var(--rule);
  padding:32px 28px;
  transition:box-shadow .3s;
}
.about-stat:hover{box-shadow:0 4px 24px rgba(0,0,0,.05)}
.about-stat-num{
  font-family:'Playfair Display',serif;
  font-size:clamp(28px,3vw,38px);font-weight:700;
  color:var(--ink);line-height:1;
  margin-bottom:8px;
}
.about-stat-num span{font-size:.55em;font-weight:400;color:var(--soft);margin-left:2px}
.about-stat-label{
  font-size:11px;color:var(--soft);letter-spacing:.06em;line-height:1.5;
}

/* ======= SERVICES: alternating ======= */
.services-list{display:flex;flex-direction:column;gap:0}
.service-row{
  display:grid;grid-template-columns:1fr 1fr;
  min-height:380px;
  border-bottom:1px solid var(--rule);
}
.service-row:first-child{border-top:1px solid var(--rule)}
/* reverse: text left, image right */
.service-row.reverse .service-content{order:-1}
.service-img{overflow:hidden;position:relative}
.service-img img{position:absolute;inset:0;transition:transform .6s}
.service-row:hover .service-img img{transform:scale(1.04)}
.service-content{
  padding:56px 56px;
  display:flex;flex-direction:column;justify-content:center;
  background:var(--cream);
}
.sv-num{
  font-family:'DM Sans',sans-serif;
  font-size:11px;font-weight:400;letter-spacing:.16em;
  color:var(--soft);margin-bottom:16px;
}
.sv-title{
  font-family:'Playfair Display',serif;
  font-size:22px;font-weight:700;margin-bottom:14px;line-height:1.35;
}
.sv-desc{font-size:13.5px;color:var(--soft);line-height:1.85;margin-bottom:24px}
.sv-link{
  font-family:'DM Sans',sans-serif;
  font-size:12px;font-weight:500;letter-spacing:.08em;
  color:var(--ink);
  display:inline-flex;align-items:center;gap:8px;
  border-bottom:1px solid var(--ink);padding-bottom:2px;
  transition:gap .2s;
}
.sv-link:hover{gap:14px}

/* ======= WORKS ======= */
.works-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.work-card{overflow:hidden}
.work-card-img{height:220px;position:relative;overflow:hidden}
.work-card-img img{transition:transform .6s}
.work-card:hover .work-card-img img{transform:scale(1.05)}
.work-card-body{padding:16px 0 0}
.wc-tag{
  font-family:'DM Sans',sans-serif;
  font-size:9.5px;font-weight:400;letter-spacing:.14em;
  text-transform:uppercase;color:var(--soft);margin-bottom:5px;
}
.wc-title{font-size:14px;font-weight:700;color:var(--ink);line-height:1.4}

/* ======= PROCESS ======= */
.process-grid{
  display:grid;grid-template-columns:repeat(5,1fr);
  gap:0;position:relative;
}
.process-grid::before{
  content:'';
  position:absolute;top:28px;left:10%;right:10%;height:1px;
  background:var(--rule);z-index:0;
}
.process-step{
  text-align:center;padding:0 12px;position:relative;z-index:1;
}
.ps-dot{
  width:56px;height:56px;border-radius:50%;
  background:var(--white);border:1px solid var(--rule);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;
  font-family:'DM Sans',sans-serif;
  font-size:13px;font-weight:500;color:var(--ink);
}
.ps-dot.active{background:rgb(223, 196, 135);border-color:rgb(223, 196, 135)}
.ps-title{font-size:13px;font-weight:700;margin-bottom:4px}
.ps-desc{font-size:11px;color:var(--soft);line-height:1.65}

/* ======= CTA ======= */
.cta-section{padding:96px 0;background:var(--ink)}
.cta-inner{max-width:800px;margin:0 auto;padding:0 48px;text-align:center}
.cta-kicker{
  font-family:'DM Sans',sans-serif;
  font-size:10px;font-weight:400;letter-spacing:.28em;
  text-transform:uppercase;
  color:rgba(255,255,255,.3);
  display:flex;align-items:center;justify-content:center;gap:12px;
  margin-bottom:20px;
}
.cta-kicker::before,.cta-kicker::after{content:'';flex:0 0 20px;height:1px;background:rgba(255,255,255,.2)}
.cta-h2{
  font-family:'Playfair Display',serif;
  font-size:clamp(26px,3.5vw,44px);font-weight:700;
  color:var(--white);line-height:1.2;margin-bottom:16px;
}
.cta-body{font-size:14px;color:rgba(255,255,255,.45);line-height:1.85;margin-bottom:48px}
.cta-row{display:flex;align-items:center;justify-content:center;gap:44px;flex-wrap:wrap}
.cta-phone-block{text-align:center}
.cta-ph-label{font-size:10px;color:rgba(255,255,255,.35);letter-spacing:.1em;margin-bottom:6px}
.cta-ph-num{
  font-family:'DM Sans',sans-serif;
  font-size:clamp(22px,3vw,32px);font-weight:300;
  color:var(--white);letter-spacing:.1em;
}
.cta-ph-hours{font-size:10px;color:rgba(255,255,255,.3);margin-top:4px;letter-spacing:.08em}
.cta-sep{width:1px;height:56px;background:rgba(255,255,255,.12)}
.btn-yellow{
  background:rgba(219, 192, 131, 1);color:rgb(255, 255, 255);
  font-family:'DM Sans',sans-serif;
  font-size:13px;font-weight:500;letter-spacing:.1em;
  padding:15px 40px;transition:opacity .2s,transform .2s;
}
.btn-yellow:hover{opacity:.9;transform:translateY(-1px)}

/* ======= FOOTER ======= */
.site-footer{background:#101114;padding:56px 0 28px}
.footer-inner{max-width:1200px;margin:0 auto;padding:0 48px}
.footer-top{
  display:flex;align-items:flex-start;justify-content:space-between;gap:40px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.07);
  margin-bottom:24px;flex-wrap:wrap;
}
.footer-brand .fl{
  font-family:'DM Sans',sans-serif;
  font-size:18px;font-weight:500;letter-spacing:.2em;color:var(--white);
  margin-bottom:8px;
}
.footer-brand .fs{font-size:11px;color:rgba(255,255,255,.25);letter-spacing:.1em}
.footer-nav{display:flex;gap:56px;flex-wrap:wrap}
.footer-col h4{font-size:9.5px;font-weight:400;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.25);margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.45);transition:color .2s}
.footer-col a:hover{color:var(--white)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer-copy{font-size:11px;color:rgba(255,255,255,.18);letter-spacing:.06em}

/* ======= ANIMATION ======= */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .65s ease,transform .65s ease}
.fade-up.in{opacity:1;transform:none}
.fade-up.stagger > *{opacity:0;transform:translateY(20px);transition:opacity .55s ease,transform .55s ease}
.fade-up.stagger.in > *:nth-child(1){transition-delay:.05s;opacity:1;transform:none}
.fade-up.stagger.in > *:nth-child(2){transition-delay:.15s;opacity:1;transform:none}
.fade-up.stagger.in > *:nth-child(3){transition-delay:.25s;opacity:1;transform:none}
.fade-up.stagger.in > *:nth-child(4){transition-delay:.35s;opacity:1;transform:none}
.fade-up.stagger.in > *:nth-child(5){transition-delay:.45s;opacity:1;transform:none}

/* ======= TABLET (≤ 960px) ======= */
@media(max-width:960px){
  .header-inner{padding:0 28px}
  .nav-list{gap:20px}

  .hero{grid-template-columns:1fr;min-height:auto}
  .hero-left{padding:60px 28px 48px;align-items:center;text-align:center}
  .hero-kicker{justify-content:center}
  .hero-h1{font-size:clamp(32px,5.5vw,48px)}
  .hero-body{max-width:100%}
  .hero-actions{justify-content:center}
  .hero-trust{justify-content:center}
  .hero-right{height:340px;position:relative}
  .hero-right img{position:absolute;inset:0}

  .strengths-grid{grid-template-columns:1fr 1fr;gap:24px}

  .about-grid{grid-template-columns:1fr;gap:48px}

  .works-grid{grid-template-columns:1fr 1fr;gap:16px}

  .process-grid{grid-template-columns:1fr 1fr;gap:32px}
  .process-grid::before{display:none}
  .process-step:last-child{grid-column:1/-1;max-width:200px;justify-self:center}

  .inner{padding:0 28px}
  .section{padding:72px 0}
  .service-content{padding:40px 32px}
  .services-list .fade-up{opacity:1;transform:none}
}

/* ======= MOBILE (≤ 640px) ======= */
@media(max-width:640px){
  .hamburger{display:flex}
  .nav-list{
    display:none;flex-direction:column;
    position:absolute;top:72px;left:0;right:0;
    background:var(--white);
    border-top:1px solid var(--rule);
    padding:20px 28px 28px;gap:0;
  }
  .nav-list.open{display:flex}
  .nav-list li{border-bottom:1px solid var(--rule)}
  .nav-link{display:block;padding:14px 0;font-size:14px}
  .nav-cta{display:block;margin-top:16px;text-align:center;padding:13px;font-size:13px}

  .hero-left{padding:48px 20px 40px}
  .hero-h1{font-size:clamp(28px,7vw,38px)}
  .hero-right{height:260px}

  .strengths-grid{grid-template-columns:1fr;gap:16px}
  .strength-card{padding:32px 24px}

  .about-grid{gap:32px}
  .about-stats{grid-template-columns:1fr 1fr}
  .about-stat{padding:24px 20px}

  .service-row{grid-template-columns:1fr;min-height:auto}
  .service-row.reverse .service-content{order:0}
  .service-img{height:220px;position:relative}
  .service-content{padding:28px 20px}

  .works-grid{grid-template-columns:1fr;gap:20px}
  .work-card-img{height:200px}

  .process-grid{grid-template-columns:1fr;gap:24px}
  .process-step{display:flex;align-items:flex-start;gap:20px;text-align:left;padding:0}
  .process-step:last-child{grid-column:auto;max-width:none;justify-self:auto}
  .ps-dot{margin:0;flex-shrink:0;width:44px;height:44px;font-size:12px}
  .ps-title{margin-top:4px}

  .cta-row{flex-direction:column;gap:28px}
  .cta-sep{display:none}

  .footer-top{flex-direction:column;gap:32px}
  .footer-nav{gap:32px}

  .inner{padding:0 20px}
  .cta-inner{padding:0 20px}
  .footer-inner{padding:0 20px}
  .section{padding:56px 0}
  .sec-head{margin-bottom:40px}
}