/* ============================================================
   LEAD Inc. — B2B Referral Service
   banking-grade document aesthetic:
   warm white / charcoal ink / deep green accent / thin rules
   IBM Plex Sans JP + IBM Plex Mono
   ============================================================ */
:root {
  --green-900: #0d2f27;
  --green-800: #103b31;
  --green-700: #175344;
  --green-500: #1e6b57;
  --green-100: #e3efea;
  --bg: #f7f7f4;
  --bg-tint: #eef1ed;
  --card: #ffffff;
  --ink: #1d2521;
  --ink-soft: #5c6660;
  --line: rgba(29, 37, 33, 0.16);
  --line-strong: rgba(29, 37, 33, 0.55);
  --sans: "IBM Plex Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.9;
  letter-spacing: 0.03em;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
b { font-weight: 600; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }
.reveal.d4 { transition-delay: 0.4s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247, 247, 244, 0.97);
  border-bottom: 1px solid var(--line);
}
.header-inner { max-width: 1200px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  background: var(--green-800); color: #e8f2ee;
  font-weight: 700; font-size: 1.15rem;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.35; }
.brand-ja { font-weight: 600; font-size: 1rem; color: var(--ink); }
.brand-en { font-family: var(--mono); font-size: 0.56rem; letter-spacing: 0.28em; color: var(--green-500); }

.global-nav { display: flex; align-items: center; gap: 26px; }
.global-nav a {
  font-size: 0.8rem; font-weight: 500; letter-spacing: 0.08em;
  color: var(--ink); position: relative; padding: 4px 0;
}
.global-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
  background: var(--green-500); transform: scaleX(0); transform-origin: right;
  transition: transform 0.3s ease;
}
.global-nav a:hover::after { transform: scaleX(1); transform-origin: left; }
.global-nav .nav-cta { border: 1px solid var(--green-700); color: var(--green-700); padding: 7px 18px; transition: background 0.3s, color 0.3s; }
.global-nav .nav-cta:hover { background: var(--green-700); color: #fff; }
.global-nav .nav-cta::after { display: none; }

.nav-toggle { display: none; }
@media (max-width: 940px) {
  .nav-toggle {
    display: block; background: none; border: 0; width: 40px; height: 40px;
    position: relative; cursor: pointer; z-index: 120;
  }
  .nav-toggle span { position: absolute; left: 8px; right: 8px; height: 2px; background: var(--ink); transition: transform 0.3s, top 0.3s; }
  .nav-toggle span:nth-child(1) { top: 15px; }
  .nav-toggle span:nth-child(2) { top: 24px; }
  .nav-open .nav-toggle span:nth-child(1) { top: 20px; transform: rotate(30deg); }
  .nav-open .nav-toggle span:nth-child(2) { top: 20px; transform: rotate(-30deg); }
  .global-nav {
    position: fixed; inset: 0; background: var(--bg);
    flex-direction: column; justify-content: center; gap: 30px;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
  }
  .nav-open .global-nav { opacity: 1; pointer-events: auto; }
  .global-nav a { font-size: 1.05rem; }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  background:
    linear-gradient(rgba(29, 37, 33, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 37, 33, 0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid; grid-template-columns: 7fr 5fr; gap: clamp(30px, 5vw, 70px);
  align-items: center; padding-top: clamp(70px, 9vw, 120px); padding-bottom: clamp(50px, 7vw, 90px);
}
@media (max-width: 880px) { .hero-grid { grid-template-columns: 1fr; } }
.hero-label { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.3em; color: var(--green-500); margin-bottom: 24px; }
.hero-title {
  font-size: clamp(2.3rem, 5.4vw, 3.9rem); font-weight: 700; line-height: 1.32;
  letter-spacing: 0.06em; color: var(--ink);
}
.hero-lead { margin-top: 28px; max-width: 34em; color: var(--ink-soft); font-size: 0.95rem; }
.hero-cta { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; }

.hero-panel {
  background: var(--card); border: 1px solid var(--line-strong);
  padding: 30px 32px 14px;
  box-shadow: 8px 8px 0 var(--green-100);
}
.panel-title { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.3em; color: var(--green-500); border-bottom: 1px solid var(--line-strong); padding-bottom: 12px; }
.hero-panel dl div { display: grid; grid-template-columns: 96px 1fr; gap: 12px; padding: 13px 0; border-bottom: 1px dashed var(--line); }
.hero-panel dl div:last-child { border-bottom: 0; }
.hero-panel dt { font-size: 0.76rem; font-weight: 600; color: var(--green-700); }
.hero-panel dd { font-size: 0.82rem; }

.hero-rule { display: flex; align-items: center; gap: 18px; padding-bottom: 22px; font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.26em; color: var(--ink-soft); }
.rule-line { flex: 1; height: 1px; background: var(--line); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; padding: 14px 36px; font-size: 0.85rem; font-weight: 600;
  letter-spacing: 0.14em; transition: all 0.3s ease; border: 1px solid transparent;
}
.btn-primary { background: var(--green-800); color: #fff; }
.btn-primary:hover { background: var(--green-500); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--green-700); color: var(--green-700); }
.btn-wide { width: 100%; text-align: center; margin-top: 26px; }

/* ---------- sections ---------- */
.section { padding: clamp(80px, 10vw, 130px) 0; }
.section-tint { background: var(--bg-tint); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { display: flex; align-items: center; gap: 24px; margin-bottom: clamp(40px, 5vw, 60px); }
.section-no { font-family: var(--mono); font-size: clamp(2.2rem, 4vw, 3.2rem); line-height: 0.9; color: var(--green-100); -webkit-text-stroke: 1px var(--green-500); font-weight: 500; }
.section-title { font-size: clamp(1.45rem, 3vw, 2rem); font-weight: 700; letter-spacing: 0.1em; }
.section-en { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.32em; color: var(--green-500); margin-top: 6px; }
.section-intro { max-width: 760px; color: var(--ink-soft); font-size: 0.95rem; margin-bottom: clamp(36px, 5vw, 54px); }
.lead-text { font-size: 1.02rem; font-weight: 500; line-height: 2.1; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); margin-bottom: clamp(48px, 6vw, 72px); }
@media (max-width: 880px) { .two-col { grid-template-columns: 1fr; } }
.two-col p:not(.lead-text) { color: var(--ink-soft); font-size: 0.92rem; }

.feature-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 880px) { .feature-row { grid-template-columns: 1fr; } }
.feature { background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--green-700); padding: 30px 28px; }
.feature-no { font-family: var(--mono); color: var(--green-500); font-size: 0.9rem; margin-bottom: 14px; }
.feature h3 { font-size: 1.02rem; font-weight: 700; letter-spacing: 0.06em; margin-bottom: 12px; }
.feature p:last-child { font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- steps ---------- */
.steps { list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: clamp(48px, 7vw, 80px); counter-reset: none; }
@media (max-width: 980px) { .steps { grid-template-columns: 1fr; } }
.steps li { background: var(--card); border: 1px solid var(--line); padding: 24px 20px; position: relative; }
.steps li:not(:last-child)::after {
  content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%);
  color: var(--green-500); font-weight: 700; z-index: 2;
}
@media (max-width: 980px) {
  .steps { gap: 40px; }
  .steps li:not(:last-child)::after {
    content: "↓"; right: auto; left: 50%; top: auto; bottom: -34px;
    transform: translateX(-50%); line-height: 1;
  }
}
.step-no { font-family: var(--mono); font-size: 0.78rem; color: var(--green-500); letter-spacing: 0.1em; margin-right: 8px; }
.steps h3 { font-size: 0.95rem; font-weight: 700; margin: 0 0 8px; letter-spacing: 0.04em; display: flex; align-items: baseline; }
.steps p { font-size: 0.78rem; color: var(--ink-soft); line-height: 1.75; }

/* ---------- money flow ---------- */
.flow-title { font-size: 1rem; font-weight: 700; letter-spacing: 0.16em; margin-bottom: 22px; }
.money-flow { display: flex; align-items: stretch; }
.flow-node { flex: 1; background: var(--card); border: 1px solid var(--line-strong); padding: 20px 10px; text-align: center; display: flex; flex-direction: column; justify-content: center; }
.fn-name { font-weight: 700; font-size: 0.95rem; letter-spacing: 0.04em; }
.fn-sub { font-size: 0.68rem; color: var(--ink-soft); margin-top: 2px; }
.flow-node-lead { background: var(--green-800); border-color: var(--green-800); }
.flow-node-lead .fn-name { color: #fff; }
.flow-node-lead .fn-sub { color: rgba(255, 255, 255, 0.65); }
.flow-arrow { width: 104px; flex: none; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 0 6px; }
.flow-arrow span { font-size: 0.62rem; color: var(--green-700); text-align: center; line-height: 1.5; margin-bottom: 6px; font-weight: 600; }
.flow-arrow small { color: var(--ink-soft); font-weight: 400; }
.flow-arrow::after {
  content: "→"; flex: none; line-height: 1;
  color: var(--green-700); font-weight: 700; font-size: 1.25rem;
}
@media (max-width: 880px) {
  .money-flow { flex-direction: column; }
  .flow-arrow { width: 100%; padding: 14px 0; flex-direction: row; gap: 12px; }
  .flow-arrow span { margin-bottom: 0; }
  .flow-arrow::after { content: "↓"; }
}
.flow-caption { margin-top: 20px; font-size: 0.78rem; color: var(--ink-soft); max-width: 760px; }

/* ---------- axes ---------- */
.axis-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: clamp(48px, 6vw, 72px); }
@media (max-width: 880px) { .axis-grid { grid-template-columns: 1fr; } }
.axis { background: var(--card); border: 1px solid var(--line); padding: clamp(26px, 3.5vw, 40px); }
.axis-label { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.3em; color: var(--green-500); margin-bottom: 14px; }
.axis h3 { font-size: 1.15rem; font-weight: 700; letter-spacing: 0.05em; margin-bottom: 14px; }
.axis > p { font-size: 0.88rem; color: var(--ink-soft); margin-bottom: 20px; }
.partner-list div { border-top: 1px dashed var(--line); padding: 16px 0; }
.partner-name { font-weight: 700; font-size: 0.92rem; margin-bottom: 6px; }
.partner-list p:not(.partner-name) { font-size: 0.8rem; color: var(--ink-soft); }
.axis-points { list-style: none; border-top: 1px dashed var(--line); padding-top: 8px; }
.axis-points li { font-size: 0.86rem; padding: 8px 0 8px 22px; position: relative; }
.axis-points li::before { content: "—"; position: absolute; left: 0; color: var(--green-500); }

/* ---------- settlement rules ---------- */
.rule-table { background: var(--card); border: 1px solid var(--line-strong); }
.rule-table > div { display: grid; grid-template-columns: 240px 1fr; gap: 20px; padding: 22px clamp(20px, 3vw, 36px); border-bottom: 1px solid var(--line); }
.rule-table > div:last-child { border-bottom: 0; }
.rule-table dt { font-weight: 700; font-size: 0.9rem; color: var(--green-800); }
.rule-table dd { font-size: 0.9rem; color: var(--ink); }
@media (max-width: 720px) { .rule-table > div { grid-template-columns: 1fr; gap: 4px; } }

/* ---------- governance ---------- */
.section-dark { background: var(--green-900); }
.section-dark .section-title { color: #fff; }
.section-dark .section-no { color: transparent; -webkit-text-stroke: 1px rgba(232, 242, 238, 0.5); }
.section-dark .section-en { color: rgba(232, 242, 238, 0.6); }
.gov-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 980px) { .gov-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .gov-grid { grid-template-columns: 1fr; } }
.gov-item { border: 1px solid rgba(232, 242, 238, 0.22); padding: 28px 26px; transition: border-color 0.3s, background 0.3s; }
.gov-item:hover { border-color: rgba(232, 242, 238, 0.6); background: rgba(232, 242, 238, 0.05); }
.gov-item h3 { color: #e8f2ee; font-size: 0.98rem; font-weight: 700; letter-spacing: 0.05em; margin-bottom: 10px; }
.gov-item p { color: rgba(232, 242, 238, 0.68); font-size: 0.82rem; }

/* ---------- company ---------- */
.company-table { border: 1px solid var(--line-strong); background: var(--card); max-width: 860px; }
.company-table div { display: grid; grid-template-columns: 190px 1fr; gap: 18px; padding: 17px clamp(20px, 3vw, 32px); border-bottom: 1px solid var(--line); }
.company-table div:last-child { border-bottom: 0; }
.company-table dt { font-weight: 700; font-size: 0.86rem; color: var(--green-800); }
.company-table dd { font-size: 0.9rem; }
@media (max-width: 560px) { .company-table div { grid-template-columns: 1fr; gap: 2px; } }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 5vw, 70px); align-items: start; }
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card { background: var(--card); border: 1px solid var(--line-strong); padding: clamp(26px, 4vw, 42px); box-shadow: 8px 8px 0 var(--green-100); }
.contact-card dl div { display: grid; grid-template-columns: 96px 1fr; gap: 14px; padding: 12px 0; border-bottom: 1px dashed var(--line); }
.contact-card dt { font-weight: 700; font-size: 0.82rem; color: var(--green-800); }
.contact-card dd { font-size: 0.9rem; }
.contact-card dd a { color: var(--green-700); font-weight: 600; }
.contact-card dd a:hover { text-decoration: underline; }

/* ---------- footer ---------- */
.site-footer { background: var(--green-900); padding: 50px 0 36px; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.footer-brand { text-align: center; }
.footer-brand .brand-ja { color: #fff; font-weight: 700; letter-spacing: 0.14em; }
.footer-brand .brand-en { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.3em; color: rgba(232, 242, 238, 0.55); margin-top: 6px; }
.footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 24px; }
.footer-nav a { color: rgba(232, 242, 238, 0.65); font-size: 0.75rem; letter-spacing: 0.08em; }
.footer-nav a:hover { color: #fff; }
.footer-copy { color: rgba(232, 242, 238, 0.35); font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.2em; }

/* ---------- photos (duotone-leaning, keeps document tone) ---------- */
.hero-band { position: relative; height: clamp(180px, 26vw, 320px); overflow: hidden; border-top: 1px solid var(--line); }
.hero-band img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(35%) contrast(1.02); }
.hero-band::after { content: ""; position: absolute; inset: 0; background: linear-gradient(rgba(16, 59, 49, 0.22), rgba(16, 59, 49, 0.1)); }

.photo { position: relative; margin: 0; }
.photo img { width: 100%; object-fit: cover; filter: grayscale(35%) contrast(1.02); }
.photo::before { content: ""; position: absolute; inset: 0; background: rgba(16, 59, 49, 0.14); pointer-events: none; }
.photo figcaption {
  position: absolute; left: 0; bottom: 0; z-index: 2;
  font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.26em;
  background: var(--green-800); color: #e8f2ee; padding: 5px 14px;
}
.photo img { aspect-ratio: 16 / 9; }
.photo-small img { aspect-ratio: 16 / 10; }
.photo-tall img { aspect-ratio: 4 / 3; height: 100%; }
.photo-tall { height: 100%; }
.photo-tall img { aspect-ratio: auto; }

.scheme-intro { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(26px, 4vw, 56px); align-items: center; margin-bottom: clamp(44px, 6vw, 64px); }
@media (max-width: 880px) { .scheme-intro { grid-template-columns: 1fr; } }

.settlement-intro { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(26px, 4vw, 56px); align-items: center; margin-bottom: clamp(36px, 5vw, 54px); }
@media (max-width: 880px) { .settlement-intro { grid-template-columns: 1fr; } }
.settlement-intro .section-intro { margin-bottom: 0; }

.company-grid { display: grid; grid-template-columns: 8fr 4fr; gap: clamp(20px, 3vw, 40px); align-items: stretch; }
@media (max-width: 880px) { .company-grid { grid-template-columns: 1fr; } }
.company-grid .photo img { height: 100%; }