:root {
  --blue-950: #062c54;
  --blue-900: #073b70;
  --blue-800: #075597;
  --blue-700: #0870c4;
  --blue-100: #e8f4fc;
  --blue-50: #f4f9fd;
  --orange: #f28a2a;
  --orange-light: #fff2e5;
  --ink: #152536;
  --muted: #5c6c7a;
  --line: #d7e3ec;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(6, 44, 84, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(7, 59, 112, .10);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(14px);
}

.header-inner {
  width: min(1180px, calc(100% - 40px));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 34px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  white-space: nowrap;
}

.brand img { width: 132px; height: auto; }
.brand-sub { color: var(--muted); font-size: .75rem; font-weight: 700; }
.header-nav { margin-left: auto; display: flex; gap: 26px; }
.header-nav a { color: #38536b; font-size: .875rem; font-weight: 700; text-decoration: none; }
.header-nav a:hover { color: var(--blue-700); }

.header-contact {
  min-width: 174px;
  padding: 9px 18px;
  border-radius: 8px;
  color: var(--white);
  background: var(--blue-900);
  text-align: center;
  text-decoration: none;
  line-height: 1.25;
}
.header-contact span { display: block; font-size: .68rem; }
.header-contact strong { font-size: 1rem; letter-spacing: .04em; }

.hero {
  position: relative;
  overflow: hidden;
  min-height: 660px;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(430px, .98fr);
  align-items: stretch;
  background: linear-gradient(130deg, #f8fbfe 0%, #eef7fd 47%, #ffffff 47%);
}

.hero::before {
  content: "";
  position: absolute;
  width: 430px;
  height: 430px;
  left: -260px;
  bottom: -200px;
  border: 64px solid rgba(8, 112, 196, .08);
  border-radius: 50%;
}

.hero-copy {
  position: relative;
  z-index: 2;
  width: min(650px, calc(100% - 64px));
  margin-left: max(40px, calc((100vw - 1180px) / 2));
  padding: 84px 42px 72px 0;
  align-self: center;
}

.eyebrow,
.section-kicker {
  margin-bottom: 14px;
  color: var(--blue-700);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.hero h1 {
  margin-bottom: 26px;
  color: var(--blue-950);
  font-size: clamp(2.55rem, 4.25vw, 4.5rem);
  line-height: 1.22;
  letter-spacing: -.055em;
}

.hero h1 em { color: var(--blue-700); font-style: normal; }
.hero-lead { max-width: 590px; margin-bottom: 32px; color: #334e65; font-size: 1.08rem; }
.hero-lead strong { color: var(--blue-800); font-size: 1.25em; }

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  overflow: hidden;
  max-width: 610px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 14px 40px rgba(6, 44, 84, .09);
}

.hero-point { position: relative; padding: 18px 12px 16px; text-align: center; line-height: 1.25; }
.hero-point + .hero-point::before { content: ""; position: absolute; top: 16px; bottom: 16px; left: 0; width: 1px; background: var(--line); }
.hero-point span, .hero-point small { display: block; }
.hero-point span { margin-bottom: 5px; color: var(--muted); font-size: .73rem; font-weight: 700; }
.hero-point strong { color: var(--blue-900); font-size: 1.25rem; letter-spacing: -.03em; }
.hero-point small { margin-top: 4px; color: #6c7b88; font-size: .68rem; }
.hero-note { margin: 14px 0 0; color: #71808d; font-size: .72rem; }

.hero-visual { position: relative; min-height: 660px; }
.hero-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255,255,255,.18), transparent 24%); pointer-events: none; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }

.hero-seal {
  position: absolute;
  z-index: 2;
  left: -60px;
  bottom: 66px;
  width: 142px;
  height: 142px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 6px solid rgba(255,255,255,.8);
  border-radius: 50%;
  color: var(--white);
  background: var(--orange);
  box-shadow: 0 18px 40px rgba(160, 76, 10, .22);
  line-height: 1.15;
}
.hero-seal span { font-size: .72rem; font-weight: 700; }
.hero-seal strong { margin: 4px 0; font-size: 2.25rem; letter-spacing: -.08em; }
.hero-seal small { font-size: .65rem; }

.intro, .limits, .flow { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 108px 0; }
.section-heading { max-width: 760px; margin-bottom: 46px; }
.section-heading h2, .emergency h2, .conditions h2, .contact h2, .audience-card h2 {
  margin-bottom: 18px;
  color: var(--blue-950);
  font-size: clamp(1.85rem, 3vw, 2.75rem);
  line-height: 1.35;
  letter-spacing: -.035em;
}
.section-heading > p:last-child { color: var(--muted); }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card {
  position: relative;
  min-height: 305px;
  padding: 38px 32px 30px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
  box-shadow: 0 12px 40px rgba(6, 44, 84, .06);
}
.feature-card.featured { transform: translateY(-14px); color: var(--white); border-color: var(--blue-800); background: linear-gradient(145deg, var(--blue-800), var(--blue-950)); box-shadow: var(--shadow); }
.feature-number { display: block; margin-bottom: 28px; color: var(--orange); font-size: .78rem; font-weight: 900; letter-spacing: .12em; }
.feature-label { margin-bottom: 4px; color: var(--blue-700); font-size: .8rem; font-weight: 800; }
.feature-card h3 { margin-bottom: 14px; color: var(--blue-950); font-size: 1.45rem; line-height: 1.4; }
.feature-card > p:last-child { margin-bottom: 0; color: var(--muted); font-size: .91rem; }
.feature-card.featured .feature-label, .feature-card.featured h3, .feature-card.featured > p:last-child { color: var(--white); }
.feature-card.featured > p:last-child { opacity: .82; }

.audiences { display: grid; grid-template-columns: repeat(2, 1fr); }
.audience-card { min-height: 370px; padding: 76px max(38px, calc((100vw - 1120px) / 2)); }
.audience-card.seller { padding-left: max(40px, calc((100vw - 1120px) / 2)); padding-right: 72px; background: var(--blue-50); }
.audience-card.buyer { padding-right: max(40px, calc((100vw - 1120px) / 2)); padding-left: 72px; color: var(--white); background: var(--blue-900); }
.audience-tag { display: inline-block; margin-bottom: 20px; padding: 4px 12px; border-radius: 99px; color: var(--blue-800); background: var(--white); font-size: .78rem; font-weight: 800; }
.buyer h2, .buyer p { color: var(--white); }
.buyer p.audience-tag { color: var(--blue-800); }
.audience-card > p:last-child { margin-bottom: 0; opacity: .82; }

.equipment { padding: 108px max(20px, calc((100vw - 1120px) / 2)); color: var(--white); background: var(--blue-950); }
.section-heading.light h2, .section-heading.light > p:last-child { color: var(--white); }
.section-heading.light > p:last-child { opacity: .72; }
.equipment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.equipment-card { min-height: 240px; padding: 28px; border: 1px solid rgba(255,255,255,.15); border-radius: 14px; background: rgba(255,255,255,.07); }
.equipment-card.primary { background: var(--blue-700); border-color: var(--blue-700); }
.equipment-topline { display: flex; align-items: center; justify-content: space-between; margin-bottom: 30px; }
.equipment-topline span { color: #8fc9f3; font-size: .74rem; font-weight: 900; letter-spacing: .1em; }
.equipment-card.primary .equipment-topline span { color: #d8f0ff; }
.equipment-topline strong { padding: 3px 9px; border-radius: 99px; color: #d9ebf8; background: rgba(255,255,255,.1); font-size: .72rem; }
.equipment-card h3 { margin-bottom: 12px; color: var(--white); font-size: 1.35rem; }
.equipment-card p { margin-bottom: 0; color: #c7d7e5; font-size: .88rem; }
.equipment-card.primary p { color: var(--white); opacity: .82; }
.equipment-note { margin: 24px 0 0; color: #aebfce; font-size: .76rem; }

.limit-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 22px; }
.limit-main { min-height: 300px; display: flex; flex-direction: column; align-items: center; justify-content: center; border-radius: 18px; color: var(--white); background: linear-gradient(145deg, var(--blue-700), var(--blue-950)); box-shadow: var(--shadow); }
.limit-main p { margin-bottom: 10px; font-size: 1.05rem; font-weight: 800; }
.limit-main > span { opacity: .75; font-size: .85rem; }
.limit-main strong { margin: 8px 0 0; font-size: 4.2rem; line-height: 1; letter-spacing: -.08em; }
.limit-main strong span { font-size: .42em; }
.limit-main small { margin-top: 12px; opacity: .7; }
.limit-older { padding: 32px 38px; border: 1px solid var(--line); border-radius: 18px; background: var(--blue-50); }
.limit-title { margin-bottom: 16px; color: var(--blue-900); font-weight: 900; }
.limit-older dl { margin: 0; }
.limit-older dl div { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 0; border-top: 1px solid var(--line); }
.limit-older dt { color: #3d556a; }
.limit-older dd { margin: 0; color: var(--blue-900); font-size: 1.55rem; font-weight: 900; white-space: nowrap; }
.limits-note { margin: 24px 0 0; color: #6b7a87; font-size: .78rem; }

.emergency { width: min(1180px, calc(100% - 40px)); margin: 0 auto 108px; display: grid; grid-template-columns: .8fr 1.2fr; overflow: hidden; border-radius: 22px; color: var(--white); background: var(--blue-900); box-shadow: var(--shadow); }
.emergency-copy { padding: 60px 56px; }
.emergency-copy .section-kicker { color: #8fd0ff; }
.emergency-copy h2 { color: var(--white); }
.emergency-copy > p:last-child { margin-bottom: 0; color: #c9dbea; }
.emergency-items { display: grid; grid-template-columns: repeat(3, 1fr); background: var(--blue-50); }
.emergency-items div { display: flex; flex-direction: column; justify-content: center; min-height: 280px; padding: 28px; text-align: center; border-left: 1px solid var(--line); }
.emergency-items span { margin-bottom: 22px; color: var(--orange); font-size: .72rem; font-weight: 900; letter-spacing: .16em; }
.emergency-items strong { color: var(--blue-950); font-size: 1.5rem; }
.emergency-items small { margin-top: 7px; color: var(--muted); font-size: .75rem; }

.flow { padding-top: 0; }
.flow-list { margin: 0; padding: 0; list-style: none; }
.flow-list li { display: grid; grid-template-columns: 130px 1fr; gap: 36px; padding: 30px 0; border-top: 1px solid var(--line); }
.flow-list li:last-child { border-bottom: 1px solid var(--line); }
.flow-list > li > span { color: var(--blue-700); font-size: .78rem; font-weight: 900; letter-spacing: .12em; }
.flow-list h3 { margin-bottom: 7px; color: var(--blue-950); font-size: 1.22rem; }
.flow-list p { margin-bottom: 0; color: var(--muted); }

.conditions { padding: 96px 20px; background: #eef3f6; }
.conditions-inner { width: min(1120px, 100%); margin: 0 auto; display: grid; grid-template-columns: .72fr 1.28fr; gap: 72px; }
.conditions-heading p:last-child { color: var(--muted); }
.conditions ul { margin: 0; padding: 0; list-style: none; }
.conditions li { position: relative; padding: 15px 0 15px 28px; border-top: 1px solid #cbd8e1; color: #435767; font-size: .9rem; }
.conditions li::before { content: ""; position: absolute; top: 25px; left: 4px; width: 8px; height: 8px; border-radius: 50%; background: var(--blue-700); }
.conditions li:last-child { border-bottom: 1px solid #cbd8e1; }
.contact { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 96px 0; display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.contact > div:first-child { max-width: 650px; }
.contact > div:first-child p:last-child { margin-bottom: 0; color: var(--muted); }
.contact-actions { min-width: 320px; display: grid; gap: 12px; }
.contact-actions a { border-radius: 10px; text-align: center; text-decoration: none; }
.phone-button { padding: 15px 22px; color: var(--white); background: var(--blue-900); line-height: 1.25; }
.phone-button span { display: block; margin-bottom: 4px; font-size: .72rem; }
.phone-button strong { font-size: 1.45rem; letter-spacing: .03em; }
.web-button { padding: 14px 22px; border: 1px solid var(--blue-800); color: var(--blue-800); font-weight: 800; }

footer { padding: 36px max(20px, calc((100vw - 1120px) / 2)); display: flex; align-items: flex-start; justify-content: space-between; gap: 50px; color: #abbaca; background: #061f38; font-size: .72rem; }
footer div { display: flex; flex-direction: column; color: var(--white); }
footer div strong { font-size: 1rem; }
footer div span { opacity: .65; }
footer p { max-width: 670px; margin-bottom: 0; }

@media (max-width: 980px) {
  .header-nav { display: none; }
  .header-contact { margin-left: auto; }
  .hero { min-height: auto; grid-template-columns: 1fr; background: var(--blue-50); }
  .hero-copy { width: min(720px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0 54px; }
  .hero-visual { min-height: 430px; }
  .hero-seal { left: auto; right: 28px; bottom: 28px; }
  .audience-card.seller, .audience-card.buyer { padding: 64px 44px; }
  .equipment-grid { grid-template-columns: repeat(2, 1fr); }
  .emergency { grid-template-columns: 1fr; }
  .emergency-items div { min-height: 200px; }
  .conditions-inner { grid-template-columns: 1fr; gap: 28px; }
  .contact { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 700px) {
  body { font-size: 16px; line-height: 1.75; }
  .header-inner { width: calc(100% - 28px); min-height: 66px; }
  .brand-sub { display: none; }
  .brand img { width: 112px; }
  .header-contact { min-width: 0; padding: 9px 12px; }
  .header-contact span { display: none; }
  .header-contact strong { font-size: .85rem; }
  .hero-copy { width: calc(100% - 36px); padding: 58px 0 42px; }
  .hero h1 { font-size: 2.45rem; }
  .hero-lead { font-size: 1rem; }
  .hero-points { grid-template-columns: 1fr; }
  .hero-point { display: grid; grid-template-columns: 1fr 1fr; align-items: center; padding: 13px 18px; text-align: left; }
  .hero-point + .hero-point::before { top: 0; right: 16px; bottom: auto; left: 16px; width: auto; height: 1px; }
  .hero-point span { margin: 0; }
  .hero-point small { grid-column: 2; }
  .hero-visual { min-height: 310px; }
  .hero-seal { width: 112px; height: 112px; right: 18px; bottom: 18px; border-width: 4px; }
  .hero-seal strong { font-size: 1.8rem; }
  .intro, .limits, .flow { width: calc(100% - 36px); padding: 78px 0; }
  .section-heading { margin-bottom: 34px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; padding: 30px 26px; }
  .feature-card.featured { transform: none; }
  .audiences { grid-template-columns: 1fr; }
  .audience-card.seller, .audience-card.buyer { min-height: 0; padding: 58px 24px; }
  .equipment { padding: 78px 18px; }
  .equipment-grid { grid-template-columns: 1fr; }
  .equipment-card { min-height: 0; }
  .limit-layout { grid-template-columns: 1fr; }
  .limit-main { min-height: 270px; }
  .limit-older { padding: 24px; }
  .limit-older dd { font-size: 1.3rem; }
  .emergency { width: calc(100% - 36px); margin-bottom: 78px; }
  .emergency-copy { padding: 44px 26px; }
  .emergency-items { grid-template-columns: 1fr; }
  .emergency-items div { min-height: 145px; border-top: 1px solid var(--line); border-left: 0; }
  .emergency-items span { margin-bottom: 8px; }
  .flow { padding-top: 0; }
  .flow-list li { grid-template-columns: 1fr; gap: 8px; padding: 24px 0; }
  .conditions { padding: 70px 18px; }
  .contact { width: calc(100% - 36px); padding: 72px 0; }
  .contact-actions { min-width: 100%; width: 100%; }
  footer { padding: 34px 18px; flex-direction: column; gap: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}