:root {
  --navy: #073a73;
  --blue: #1477b8;
  --ink: #17222c;
  --pale: #eff5f8;
  --red: #d92f36;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.8;
}
a { color: inherit; text-decoration: none; }

.site-header {
  height: 92px;
  padding-left: clamp(24px, 4vw, 70px);
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto 255px;
  align-items: stretch;
  background: rgba(255,255,255,.96);
  position: relative;
  z-index: 20;
}
.brand { display: flex; align-items: center; width: max-content; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.1; }
.brand-copy strong { color: var(--navy); font-size: clamp(21px, 2vw, 28px); font-weight: 800; letter-spacing: .08em; }
.desktop-nav { display: flex; }
.desktop-nav a {
  min-width: 130px; height: 92px; padding: 20px 22px 15px; border-left: 1px solid #e9ecee;
  display: flex; flex-direction: column; justify-content: center; font-size: 12px; font-weight: 700; letter-spacing: .08em;
  transition: color .25s, background .25s;
}
.desktop-nav a span { color: var(--blue); font: 700 10px/1.5 Arial, sans-serif; letter-spacing: .16em; }
.desktop-nav a:hover { background: var(--pale); color: var(--blue); }
.header-contact { color: #fff; background: var(--blue); display: flex; flex-direction: column; justify-content: center; padding: 0 32px; }
.header-contact small { font-size: 11px; letter-spacing: .08em; }
.header-contact strong { font: 700 23px/1.3 Arial, sans-serif; letter-spacing: .06em; }
.mobile-menu { display: none; }

.hero { min-height: calc(100svh - 92px); height: 720px; position: relative; overflow: hidden; color: #fff; }
.hero-photo { position: absolute; inset: 0; background: url('assets/hero.jpg') center 42%/cover no-repeat; transform: scale(1.015); animation: settle 1.4s ease-out both; }
@keyframes settle { from { transform: scale(1.08); } to { transform: scale(1.015); } }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(1,27,53,.86) 0%, rgba(2,32,59,.55) 43%, rgba(2,32,59,.08) 80%); }
.hero-shade::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px); background-size: 80px 80px; }
.hero-content { position: relative; z-index: 2; height: 100%; max-width: 1400px; margin: auto; padding: 120px clamp(30px, 8vw, 120px); display: flex; flex-direction: column; justify-content: center; }
.hero-eyebrow { margin: 0 0 24px; font: 700 11px/1 Arial, sans-serif; letter-spacing: .3em; color: #aed7ec; }
.hero h1 { margin: 0; font-size: clamp(55px, 7.2vw, 105px); line-height: 1.18; letter-spacing: .05em; font-weight: 800; text-shadow: 0 2px 20px rgba(0,0,0,.18); }
.hero h1 em { color: #fff; font-style: normal; position: relative; }
.hero h1 em::after { content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 10px; background: var(--red); z-index: -1; }
.hero-copy { margin: 28px 0 0 5px; font-size: 17px; line-height: 2; letter-spacing: .12em; }
.scroll-guide { position: absolute; z-index: 3; bottom: 0; left: clamp(30px, 4.5vw, 72px); display: flex; align-items: center; gap: 18px; transform: rotate(90deg); transform-origin: left bottom; font: 700 9px Arial,sans-serif; letter-spacing: .3em; }
.scroll-guide i { display: block; width: 78px; height: 1px; background: rgba(255,255,255,.75); position: relative; overflow: hidden; }
.scroll-guide i::after { content: ""; position: absolute; width: 20px; height: 1px; background: #fff; animation: scroll 1.8s infinite; }
@keyframes scroll { from { left: -20px; } to { left: 90px; } }
.hero-number { position: absolute; right: 4vw; bottom: -48px; font: 800 180px/1 Arial,sans-serif; color: rgba(255,255,255,.08); }

.section { max-width: 1400px; margin: auto; padding: 130px clamp(28px, 7vw, 110px); }
.section-label { display: flex; align-items: center; gap: 15px; color: var(--blue); }
.section-label span { font: 800 12px/1 Arial,sans-serif; }
.section-label span::after { content: ""; display: inline-block; vertical-align: middle; width: 45px; height: 1px; margin-left: 12px; background: currentColor; }
.section-label p { margin: 0; font: 800 11px/1 Arial,sans-serif; letter-spacing: .22em; }
.section-label.light { color: #92c5e1; }
.kicker { margin: 0 0 18px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .16em; }
.section h2 { margin: 0; font-size: clamp(34px, 4vw, 58px); line-height: 1.45; letter-spacing: .06em; }

.intro { min-height: 700px; display: grid; grid-template-columns: 170px minmax(0, 1fr) 330px; gap: 30px; align-items: start; position: relative; overflow: hidden; }
.intro-main { padding-top: 5px; max-width: 720px; }
.intro-body { margin-top: 42px; display: grid; grid-template-columns: 1fr 1fr; gap: 35px; }
.intro-body p { margin: 0; color: #4e5d67; font-size: 14px; line-height: 2.15; text-align: justify; }
.intro-statement { justify-self: end; color: #edf3f6; font-size: clamp(50px, 5.5vw, 82px); font-weight: 900; line-height: 1.05; letter-spacing: .08em; writing-mode: vertical-rl; opacity: .95; }

.service { max-width: none; background: var(--navy); color: #fff; padding-left: max(clamp(28px,7vw,110px), calc((100vw - 1400px)/2 + 110px)); padding-right: max(clamp(28px,7vw,110px), calc((100vw - 1400px)/2 + 110px)); }
.section-heading, .company-heading, .upload-heading { display: grid; grid-template-columns: 170px 1fr; gap: 30px; }
.service h2 { color: #fff; }
.service .kicker { color: #92c5e1; }
.service-grid { display: grid; grid-template-columns: repeat(3,1fr); margin-top: 68px; border-top: 1px solid rgba(255,255,255,.17); border-bottom: 1px solid rgba(255,255,255,.17); }
.service-card { position: relative; padding: 58px 44px 55px; border-left: 1px solid rgba(255,255,255,.17); min-height: 410px; }
.service-card:last-child { border-right: 1px solid rgba(255,255,255,.17); }
.service-number { position: absolute; top: 18px; left: 22px; color: rgba(255,255,255,.18); font: 800 64px/1 Arial,sans-serif; }
.service-icon { width: 56px; height: 56px; position: relative; margin: 18px 0 40px; }
.service-icon i, .service-icon b { position: absolute; border: 2px solid #61add4; width: 38px; height: 46px; }
.service-icon i { left: 0; top: 8px; }
.service-icon b { left: 15px; top: 0; border-color: #fff; }
.service-card h3 { margin: 0 0 22px; font-size: 21px; line-height: 1.55; letter-spacing: .05em; }
.service-card p { margin: 0; color: #c4d4df; font-size: 13px; line-height: 2; }

.message { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(60px, 8vw, 130px); max-width: none; padding-left: max(clamp(28px,7vw,110px), calc((100vw - 1400px)/2 + 110px)); padding-right: max(clamp(28px,7vw,110px), calc((100vw - 1400px)/2 + 110px)); }
.message-visual { min-height: 620px; background: var(--pale); position: relative; overflow: hidden; display: grid; place-items: center; }
.message-word { position: absolute; color: #dbe8ef; font: 900 130px/1 Arial,sans-serif; letter-spacing: -.06em; transform: rotate(-90deg); }
.message-frame { width: 65%; aspect-ratio: .83; border: 11px solid #fff; background: linear-gradient(150deg, rgba(9,66,116,.96), rgba(15,126,175,.78)), url('assets/hero.jpg') center/cover; box-shadow: 30px 35px 0 rgba(7,58,115,.08); display: grid; place-items: center; position: relative; }
.message-frame::before { content: "“"; position: absolute; color: rgba(255,255,255,.18); font: 180px/1 Georgia,serif; top: 15px; left: 25px; }
.message-frame span { color: #fff; font-size: clamp(24px,2.4vw,38px); font-weight: 800; line-height: 1.75; letter-spacing: .08em; z-index: 1; }
.message-copy { align-self: center; max-width: 580px; }
.message-copy .section-label { margin-bottom: 48px; }
.message-copy h2 { margin-bottom: 35px; font-size: clamp(31px,3.4vw,50px); }
.message-copy > p:not(.kicker) { color: #50606b; font-size: 14px; line-height: 2.15; }
.signature { margin-top: 35px; text-align: right; }
.signature span { font-size: 12px; margin-right: 18px; }
.signature strong { font-family: serif; font-size: 23px; letter-spacing: .2em; }

.upload { background: #fff; }
.upload-heading > div:last-child { max-width: 760px; }
.upload-heading p:not(.kicker) { margin: 24px 0 0; color: #50606b; font-size: 14px; line-height: 2; }
.upload-form {
  margin: 58px 0 0 200px;
  padding: 45px;
  background: #f3f7f9;
  border-top: 3px solid var(--navy);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.upload-form label { display: grid; gap: 9px; color: var(--navy); font-size: 13px; font-weight: 800; letter-spacing: .06em; }
.upload-form label:nth-child(3), .upload-form .file-field { grid-column: 1 / -1; }
.upload-form input, .upload-form textarea {
  width: 100%;
  border: 1px solid #d5e0e6;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  line-height: 1.6;
  padding: 14px 16px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.upload-form input:focus, .upload-form textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(20,119,184,.13);
}
.upload-form input[type="file"] { padding: 12px; }
.upload-button {
  border: 0;
  background: var(--blue);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .08em;
  padding: 17px 24px;
  transition: background .2s, transform .2s;
}
.upload-button:hover { background: var(--navy); transform: translateY(-2px); }
.upload-status { margin: 0; align-self: center; color: #50606b; font-size: 13px; line-height: 1.8; }
.upload-status.success { color: #0b6a3d; font-weight: 800; }
.upload-status.error { color: var(--red); font-weight: 800; }

.company { background: #fff; }
.company-table { margin: 65px 0 0 200px; border-top: 2px solid var(--navy); }
.company-row { display: grid; grid-template-columns: 210px 1fr; border-bottom: 1px solid #dce3e7; }
.company-row dt, .company-row dd { margin: 0; padding: 25px 20px; font-size: 14px; }
.company-row dt { color: var(--navy); font-weight: 800; background: #f3f7f9; }
.company-row dd { padding-left: 35px; color: #46545e; }
.company-row dd a { color: var(--blue); font-weight: 700; }

.contact { padding: 110px 25px; color: #fff; text-align: center; background: linear-gradient(115deg, rgba(5,47,90,.97), rgba(14,113,164,.92)), url('assets/hero.jpg') center/cover; position: relative; }
.contact::before { content:""; position:absolute; inset:0; background-image: radial-gradient(rgba(255,255,255,.16) 1px, transparent 1px); background-size: 22px 22px; opacity:.3; }
.contact-inner { position: relative; z-index: 1; }
.contact-en { margin: 0 0 25px; color: #91d1ed; font: 800 11px/1 Arial,sans-serif; letter-spacing: .35em; }
.contact h2 { margin: 0; font-size: clamp(32px,4vw,52px); line-height: 1.55; letter-spacing: .08em; }
.contact h2 + p { margin: 20px 0 35px; color: #d5e4ec; font-size: 14px; }
.phone-button { width: min(440px,100%); margin: auto; padding: 18px 30px; background: #fff; color: var(--navy); display: flex; align-items: center; justify-content: center; gap: 22px; transition: transform .25s, box-shadow .25s; }
.phone-button:hover { transform: translateY(-3px); box-shadow: 0 14px 32px rgba(0,0,0,.2); }
.phone-button span { font-size: 11px; }
.phone-button strong { font: 800 27px/1 Arial,sans-serif; letter-spacing: .06em; }

footer { background: #051f39; color: #fff; padding: 65px max(30px,6vw); display: grid; grid-template-columns: 1fr auto; gap: 18px 50px; align-items: end; }
.footer-brand { display: flex; gap: 13px; align-items: center; }
.footer-brand div { display: flex; flex-direction: column; }
.footer-brand strong { font-size: 24px; font-weight: 800; line-height: 1.35; letter-spacing: .08em; }
footer > p { grid-column: 1; margin: 0; color: #aebdca; font-size: 12px; }
footer nav { grid-column: 2; grid-row: 1; display: flex; gap: 30px; font-size: 12px; }
.copyright { grid-column: 2; color: #6f8292; font: 10px Arial,sans-serif; letter-spacing: .12em; }

@media (max-width: 1050px) {
  .site-header { grid-template-columns: 1fr auto; height: 78px; padding-right: 25px; }
  .desktop-nav, .header-contact { display: none; }
  .mobile-menu { display: block; align-self: center; }
  .mobile-menu summary { list-style: none; width: 42px; height: 42px; padding: 11px 7px; display: flex; flex-direction: column; justify-content: space-around; cursor: pointer; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .mobile-menu summary span { height: 2px; background: var(--navy); }
  .mobile-menu nav { position: absolute; top: 78px; left: 0; right: 0; background: #fff; box-shadow: 0 15px 30px rgba(0,0,0,.12); display: grid; padding: 15px 30px 25px; }
  .mobile-menu nav a { padding: 13px 5px; border-bottom: 1px solid #e7ecef; font-size: 13px; font-weight: 700; }
  .hero { min-height: calc(100svh - 78px); }
  .intro { grid-template-columns: 120px 1fr; }
  .intro-statement { display: none; }
  .section-heading, .company-heading, .upload-heading { grid-template-columns: 120px 1fr; }
  .service-card { padding-left: 28px; padding-right: 28px; }
  .message { gap: 55px; }
  .company-table, .upload-form { margin-left: 150px; }
}

@media (max-width: 720px) {
  .site-header { padding-left: 20px; padding-right: 12px; }
  .brand-copy strong { font-size: 19px; }
  .hero { height: 660px; }
  .hero-photo { background-position: 58% center; }
  .hero-shade { background: linear-gradient(90deg,rgba(1,27,53,.86),rgba(2,32,59,.22)); }
  .hero-content { padding: 80px 25px; justify-content: flex-end; padding-bottom: 110px; }
  .hero h1 { font-size: clamp(48px,15vw,72px); }
  .hero-copy { font-size: 14px; }
  .hero-number { font-size: 120px; }
  .section { padding: 90px 25px; }
  .intro, .section-heading, .company-heading, .upload-heading { display: block; }
  .section-label { margin-bottom: 40px; }
  .intro-body { grid-template-columns: 1fr; gap: 20px; margin-top: 32px; }
  .service { padding-left: 25px; padding-right: 25px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card, .service-card:last-child { border-right: 1px solid rgba(255,255,255,.17); border-bottom: 1px solid rgba(255,255,255,.17); min-height: 0; }
  .service-card:last-child { border-bottom: 0; }
  .message { display: flex; flex-direction: column; padding-left: 25px; padding-right: 25px; }
  .message-visual { min-height: 480px; }
  .message-frame { width: 72%; }
  .message-copy .section-label { margin-top: 10px; margin-bottom: 38px; }
  .company-table, .upload-form { margin: 48px 0 0; }
  .upload-form { padding: 28px 22px; grid-template-columns: 1fr; }
  .company-row { grid-template-columns: 100px 1fr; }
  .company-row dt, .company-row dd { padding: 20px 13px; font-size: 12px; }
  .contact { padding: 85px 20px; }
  .phone-button { flex-direction: column; gap: 6px; }
  footer { grid-template-columns: 1fr; }
  footer nav, .copyright { grid-column: 1; grid-row: auto; }
  footer nav { flex-wrap: wrap; margin-top: 15px; gap: 16px 25px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

.hp-field { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }