:root {
  --ink: #0b0d12;
  --ink-soft: #1a1e27;
  --paper: #ffffff;
  --soft: #f4f4f1;
  --muted: #6b7080;
  --line: #e2e1dc;
  --tide: #6f8fb8;
  --tide-deep: #26364f;
  --serif: "Shippori Mincho", serif;
  --sans: "Noto Sans JP", "Inter", sans-serif;
  --latin: "Cormorant Garamond", serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); color: var(--ink); background: var(--paper); line-height: 1.9; -webkit-font-smoothing: antialiased; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { color: inherit; text-decoration: none; }
.container { width: min(1120px, 100% - 48px); margin-inline: auto; }
br.pc { display: inline; }

/* Header */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 40px; background: rgba(255,255,255,0);
  transition: background .3s, padding .3s, box-shadow .3s;
}
.site-header.scrolled { background: rgba(255,255,255,.94); backdrop-filter: blur(8px); padding-block: 12px; box-shadow: 0 1px 0 var(--line); }
.logo { display: flex; flex-direction: column; line-height: 1.1; }
.logo-mark { font-family: var(--latin); font-size: 26px; letter-spacing: .28em; font-weight: 500; }
.logo-sub { font-family: var(--latin); font-style: italic; font-size: 13px; letter-spacing: .12em; color: var(--muted); }
.nav { display: flex; align-items: center; gap: 28px; font-family: "Inter", sans-serif; font-size: 13px; letter-spacing: .12em; }
.nav a { color: #3a3f4b; transition: color .2s; }
.nav a:hover { color: var(--ink); }
.nav-cta { background: var(--ink); color: #fff !important; padding: 8px 18px; border-radius: 999px; letter-spacing: .06em; font-family: var(--sans); }

/* Hero */
.hero { padding: 150px 0 100px; background: linear-gradient(180deg, #fff 0%, var(--soft) 100%); }
.hero-inner { width: min(1120px, 100% - 48px); margin-inline: auto; display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.eyebrow { font-family: "Inter", sans-serif; font-size: 12px; letter-spacing: .3em; text-transform: uppercase; color: var(--tide); margin-bottom: 16px; }
.eyebrow.light { color: #a9bedb; }
.hero-title { font-family: var(--serif); font-weight: 700; font-size: clamp(38px, 5vw, 64px); line-height: 1.4; letter-spacing: .05em; }
.hero-lead { margin-top: 28px; font-size: 15px; color: #3a3f4b; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-visual { aspect-ratio: 4 / 5; border-radius: 6px; overflow: hidden; box-shadow: 0 30px 60px -30px rgba(11,13,18,.45); }

.btn { display: inline-block; padding: 14px 30px; border-radius: 999px; font-size: 14px; letter-spacing: .06em; transition: transform .2s, opacity .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-line { border: 1px solid var(--ink); }
.btn-white { background: #fff; color: var(--ink); }

/* Sections */
.section { padding: 110px 0; }
.section-soft { background: var(--soft); }
.section-dark { background: var(--ink); color: #fff; }
.section-head { margin-bottom: 48px; }
.section-title { font-family: var(--serif); font-size: clamp(26px, 3.4vw, 38px); letter-spacing: .06em; line-height: 1.5; }
.section-title.light { color: #fff; }
.section-lead { margin-top: 12px; color: var(--muted); font-size: 15px; }
.note { font-size: 13px; color: var(--muted); margin-top: 24px; }
.note.light { color: rgba(255,255,255,.6); }

.services { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.service { background: #fff; padding: 40px 36px; position: relative; }
.service-no { font-family: var(--latin); font-size: 30px; color: var(--tide); }
.service h3 { font-family: var(--serif); font-size: 22px; margin: 6px 0 12px; }
.service p { font-size: 14px; color: #3a3f4b; }
.more { display: inline-block; margin-top: 16px; font-size: 13px; color: var(--tide-deep); border-bottom: 1px solid currentColor; }

.strengths { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.strength { border-top: 1px solid rgba(255,255,255,.25); padding-top: 24px; }
.strength h3 { font-family: var(--serif); font-size: 22px; margin-bottom: 12px; }
.strength p { font-size: 14px; color: rgba(255,255,255,.75); }
.section-dark .eyebrow { color: #a9bedb; }

.works { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.work-img { aspect-ratio: 4 / 5; border-radius: 4px; overflow: hidden; }
.work-img img { transition: transform .6s; }
.work:hover .work-img img { transform: scale(1.04); }
.work figcaption { margin-top: 14px; font-size: 14px; }
.work figcaption span { display: block; font-size: 11px; letter-spacing: .2em; color: var(--tide); margin-bottom: 2px; }

.flow { list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: none; }
.flow li { background: #fff; border-radius: 4px; padding: 26px 22px; }
.flow span { font-family: var(--latin); font-size: 26px; color: var(--tide); }
.flow h3 { font-family: var(--serif); font-size: 18px; margin: 4px 0 8px; }
.flow p { font-size: 13px; color: var(--muted); line-height: 1.8; }

.ip-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.ip { display: grid; grid-template-columns: 160px 1fr; align-items: center; gap: 24px; border: 1px solid var(--line); border-radius: 4px; padding: 16px; transition: border-color .2s, transform .2s; }
.ip:hover { border-color: var(--ink); transform: translateY(-2px); }
.ip-img { aspect-ratio: 1; border-radius: 2px; overflow: hidden; }
.ip-text h3 { font-family: var(--latin); font-size: 28px; letter-spacing: .12em; font-weight: 500; }
.ip-text p { font-size: 14px; color: #3a3f4b; }
.ip-text span { display: inline-block; margin-top: 10px; font-size: 13px; color: var(--tide-deep); }

.company-table { display: grid; grid-template-columns: 160px 1fr; border-top: 1px solid var(--line); background: #fff; }
.company-table dt, .company-table dd { padding: 18px 24px; border-bottom: 1px solid var(--line); font-size: 15px; }
.company-table dt { color: var(--muted); }

.contact { background: var(--tide-deep); color: #fff; text-align: center; }
.contact-inner p { margin: 16px 0 28px; opacity: .9; }

.site-footer { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 32px; padding: 36px 40px; background: var(--ink); color: rgba(255,255,255,.75); }
.footer-brand { display: flex; flex-direction: column; }
.footer-brand .logo-mark { font-size: 20px; color: #fff; }
.footer-tag { font-size: 12px; opacity: .7; }
.footer-links { display: flex; gap: 20px; font-family: "Inter", sans-serif; font-size: 13px; letter-spacing: .08em; }

/* Mobile */
@media (max-width: 860px) {
  .site-header { padding: 14px 16px; }
  .nav a:not(.nav-cta) { display: none; }
  .logo-mark { font-size: 20px; }
  .container, .hero-inner { width: calc(100% - 32px); }
  br.pc { display: none; }
  .hero { padding: 110px 0 70px; }
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual { aspect-ratio: 4 / 3; }
  .section { padding: 72px 0; }
  .services, .strengths, .works, .ip-grid { grid-template-columns: 1fr; }
  .strengths { gap: 28px; }
  .flow { grid-template-columns: 1fr; }
  .ip { grid-template-columns: 110px 1fr; gap: 16px; }
  .company-table { grid-template-columns: 96px 1fr; }
  .company-table dt, .company-table dd { padding: 14px 12px; font-size: 14px; }
  .site-footer { grid-template-columns: 1fr; gap: 16px; padding: 28px 16px; }
}

/* Contact form */
.cform { max-width: 680px; margin: 32px auto 0; padding: 32px; background: #fff; color: #1f2633; border-radius: 18px; text-align: left; display: grid; gap: 16px; box-shadow: 0 20px 40px -24px rgba(0,0,0,.5); }
.cform-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cform label { display: block; font-size: 14px; font-weight: 700; }
.cform label > input, .cform label > select, .cform label > textarea { display: block; margin-top: 6px; }
.cform label b { display: inline-block; margin-left: 8px; font-size: 11px; color: #fff; background: #e0603a; border-radius: 4px; padding: 1px 6px; vertical-align: 1px; }
.cform input, .cform select, .cform textarea { width: 100%; font: inherit; font-weight: 400; font-size: 16px; padding: 12px 14px; border: 1px solid #cfd7e6; border-radius: 10px; background: #f8faff; color: #1f2633; }
.cform input:focus, .cform select:focus, .cform textarea:focus { outline: 2px solid #2f6fe4; outline-offset: 1px; background: #fff; }
.cform button { justify-self: center; min-width: 240px; padding: 15px 40px; border: 0; border-radius: 999px; font: inherit; font-weight: 700; font-size: 17px; color: #fff; background: linear-gradient(135deg, #ff8a3d, #ffb347); cursor: pointer; }
.cform button:disabled { opacity: .6; }
.cform-hp { position: absolute; left: -9999px; }
.cform-msg { text-align: center; font-size: 14px; min-height: 1.5em; margin: 0 !important; opacity: 1 !important; color: #3b4456; }
.cform-msg.ok { color: #1e8a4c; font-weight: 700; }
.cform-msg.err { color: #c0392b; font-weight: 700; }
@media (max-width: 860px) { .cform { padding: 22px 18px; } .cform-row { grid-template-columns: 1fr; } .cform button { width: 100%; } }

.cform-note { text-align: center; font-size: 12px; color: #6b7486; margin: 0 !important; opacity: 1 !important; }
.cform-note a { color: #2f6fe4; text-decoration: underline; }

/* Policy page */
.policy { padding: 140px 0 100px; }
.policy-inner { max-width: 820px; }
.policy h1 { margin-bottom: 28px; }
.policy h2 { font-family: var(--mincho, serif); font-size: 20px; margin: 40px 0 12px; padding-top: 8px; border-top: 1px solid rgba(0,0,0,.08); }
.policy p, .policy li { line-height: 2; font-size: 15px; }
.policy ul { padding-left: 1.4em; }
.policy a { text-decoration: underline; }
.policy .company-table { margin-top: 16px; }
.policy-date { margin-top: 40px; color: #6b7486; font-size: 13px; }