:root {
  --ink: #101311;
  --paper: #f4f5f2;
  --white: #ffffff;
  --muted: #646a65;
  --line: #d6d9d4;
  --accent: #b7ff35;
  --accent-deep: #7fb600;
  --max: 1200px;
  --pad: clamp(20px, 4vw, 64px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  overflow-x: hidden;
}
a { color: inherit; }
img, svg { max-width: 100%; }
.container { width: min(100%, calc(var(--max) + var(--pad) * 2)); margin-inline: auto; padding-inline: var(--pad); }
.narrow { max-width: 1040px; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; transform: translateY(-150%); background: var(--accent); color: var(--ink); padding: 10px 16px; font-weight: 800; }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--accent-deep); outline-offset: 4px; }

.site-header { position: absolute; inset: 0 0 auto; z-index: 10; color: var(--white); }
.header-inner { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid rgba(255,255,255,.16); }
.brand { display: inline-flex; min-height: 44px; align-items: center; gap: 12px; text-decoration: none; font-size: .86rem; font-weight: 700; letter-spacing: .04em; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid rgba(255,255,255,.45); font-size: .7rem; }
.text-link { font-size: .84rem; font-weight: 700; text-underline-offset: 5px; }

.hero { background: var(--ink); color: var(--white); padding: 152px 0 0; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(48px, 7vw, 104px); align-items: center; }
.section-number { margin: 0 0 28px; color: var(--muted); font: 700 .72rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .17em; }
.hero .section-number, .dark-section .section-number, .plans-section .section-number, .final-cta .section-number { color: var(--accent); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(2.8rem, 3.7vw, 4.8rem); line-height: 1.08; letter-spacing: -.055em; font-weight: 800; }
h1 span { color: var(--accent); }
.hero-statement { margin: 28px 0; font-size: clamp(1.7rem, 3vw, 3rem); line-height: 1.35; font-weight: 800; letter-spacing: -.03em; }
.hero-lead { max-width: 680px; margin: 0 0 32px; color: #cfd3cf; font-size: 1rem; }
.cta { display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 60px; max-width: 100%; padding: 14px 22px; background: var(--accent); color: var(--ink); text-decoration: none; font-weight: 800; line-height: 1.45; border: 2px solid var(--accent); transition: background .2s, color .2s, transform .2s; }
.cta:hover { background: transparent; color: var(--accent); transform: translateY(-2px); }
.cta-dark { background: var(--ink); color: var(--white); border-color: var(--ink); }
.cta-dark:hover { background: var(--accent); color: var(--ink); border-color: var(--accent-deep); }
.microcopy, .cta-note { max-width: 640px; margin: 14px 0 0; color: #969c97; font-size: .78rem; }

.equation-card { position: relative; display: grid; grid-template-columns: 1fr 1fr; align-self: stretch; min-height: 620px; border: 1px solid #3d423e; background: #171b18; }
.equation-side { padding: 42px 30px 88px; }
.equation-side + .equation-side { border-left: 1px solid #3d423e; }
.equation-label { color: #8c938e; font: 700 .65rem/1.2 ui-monospace, monospace; letter-spacing: .13em; }
.equation-side h2 { margin: 80px 0 34px; font-size: clamp(1.7rem, 2.8vw, 2.7rem); line-height: 1.2; }
.equation-side ul { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 0; list-style: none; }
.equation-side li { border: 1px solid #424944; padding: 5px 9px; color: #bfc5c0; font-size: .72rem; }
.profit-side { background: var(--accent); color: var(--ink); }
.profit-side .equation-label { color: #4a660f; }
.profit-side li { border-color: rgba(16,19,17,.3); color: var(--ink); }
.not-equal { position: absolute; z-index: 2; left: 50%; top: 49%; display: grid; place-items: center; width: 74px; height: 74px; transform: translate(-50%,-50%); background: var(--white); color: var(--ink); font-size: 2.3rem; font-weight: 900; border-radius: 50%; }
.equation-conclusion { position: absolute; inset: auto 0 0; margin: 0; padding: 22px 30px; background: var(--white); color: var(--ink); text-align: center; font-weight: 800; letter-spacing: .04em; }
.proof-strip { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 80px; border-top: 1px solid #333834; }
.proof-strip div { display: flex; flex-direction: column; padding: 30px 24px; border-right: 1px solid #333834; }
.proof-strip div:first-child { border-left: 1px solid #333834; }
.proof-strip strong { color: var(--accent); font-size: clamp(1.3rem,2.2vw,2.1rem); line-height: 1.2; font-variant-numeric: tabular-nums; }
.proof-strip span { margin-top: 8px; color: #a7ada8; font-size: .76rem; }

.section { padding-block: clamp(88px, 11vw, 152px); }
.section-heading { max-width: 580px; }
.section-heading.wide { max-width: 900px; margin-bottom: 54px; }
.section h2, .final-cta h2 { margin: 0 0 28px; font-size: clamp(2.15rem, 4.5vw, 4.8rem); line-height: 1.18; letter-spacing: -.045em; }
.section h3 { line-height: 1.45; }
.section-heading > p:last-child { color: var(--muted); }
.dark-section { background: #1b1f1c; color: var(--white); }
.dark-section h2 { max-width: 920px; }
.two-col-copy { display: grid; grid-template-columns: repeat(2,1fr); gap: 48px; margin-top: 48px; padding-top: 48px; border-top: 1px solid #3c423d; color: #c7ccc8; }
.two-col-copy p { margin: 0; }

.diagnosis-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(48px, 9vw, 130px); align-items: start; }
.diagnosis-layout .section-heading { position: sticky; top: 40px; }
.diagnosis-layout .cta { margin-top: 24px; font-size: .9rem; }
.checklist { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.checklist li { position: relative; padding: 24px 12px 24px 48px; border-bottom: 1px solid var(--line); font-weight: 650; }
.checklist li::before { content: ""; position: absolute; left: 9px; top: 31px; width: 15px; height: 8px; border: solid var(--accent-deep); border-width: 0 0 3px 3px; transform: rotate(-45deg); }

.report-section { background: var(--white); }
.report-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(48px, 8vw, 110px); align-items: center; }
.profit-structure { margin: 0; padding: clamp(24px,4vw,52px); background: var(--ink); color: var(--white); }
.profit-structure figcaption { margin-bottom: 32px; color: #909791; font: 700 .68rem/1.2 ui-monospace, monospace; letter-spacing: .15em; }
.structure-row { display: flex; justify-content: space-between; gap: 20px; padding: 20px 22px; font-size: 1.2rem; font-weight: 800; }
.structure-row b { font: 700 .7rem/1.8 ui-monospace, monospace; letter-spacing: .15em; }
.structure-row.revenue { border: 1px solid #4c534d; }
.structure-row.remaining { background: var(--accent); color: var(--ink); }
.cost-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; margin: 18px 0; background: #3a403b; border: 1px solid #3a403b; }
.cost-grid span { background: #222723; padding: 14px 8px; color: #c8cdc9; text-align: center; font-size: .77rem; }
.structure-arrow { text-align: center; color: var(--accent); font-size: 1.5rem; }

.factor-grid { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--line); }
.factor-grid article { min-height: 220px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.factor-grid article:nth-child(3n) { border-right: 0; }
.factor-grid article:nth-child(n+4) { border-bottom: 0; }
.factor-grid span { color: var(--accent-deep); font: 700 .7rem/1.2 ui-monospace, monospace; }
.factor-grid h3 { margin: 34px 0 12px; font-size: 1.35rem; }
.factor-grid p { margin: 0; color: var(--muted); font-size: .9rem; }
.core-line { margin: 42px 0 0; padding-left: 20px; border-left: 5px solid var(--accent-deep); font-size: clamp(1.25rem, 2.4vw, 2rem); font-weight: 800; }

.philosophy-section { background: var(--accent); }
.philosophy-grid { display: grid; grid-template-columns: 1fr .8fr; gap: clamp(48px, 8vw, 120px); }
.philosophy-section .section-number { color: #456009; }
.large-copy { font-size: clamp(1.05rem, 1.65vw, 1.35rem); }
.large-copy p { margin: 0 0 34px; }
.large-copy p:first-child { font-size: clamp(1.5rem, 2.6vw, 2.2rem); font-weight: 800; line-height: 1.5; }

.review-section { background: var(--white); }
.review-grid { display: grid; grid-template-columns: repeat(2,1fr); border-top: 2px solid var(--ink); }
.review-grid div { display: flex; align-items: center; min-height: 104px; padding: 22px; border-bottom: 1px solid var(--line); font-size: 1.05rem; font-weight: 700; }
.review-grid div:nth-child(odd) { border-right: 1px solid var(--line); }
.review-grid span { margin-right: 20px; color: var(--accent-deep); font: 700 .72rem/1.2 ui-monospace, monospace; }

.mechanism-section { background: #e6e9e4; }
.process { display: grid; grid-template-columns: repeat(6,1fr); margin: 0; padding: 0; list-style: none; border: 1px solid #bcc2bc; }
.process li { position: relative; min-height: 180px; padding: 24px 20px; border-right: 1px solid #bcc2bc; }
.process li:last-child { border-right: 0; }
.process li::after { content: "→"; position: absolute; z-index: 2; right: -14px; top: 50%; width: 28px; height: 28px; margin-top: -14px; background: #e6e9e4; text-align: center; line-height: 28px; }
.process li:last-child::after { display: none; }
.process span { color: var(--muted); font: 700 .7rem/1.2 ui-monospace, monospace; }
.process strong { display: block; margin-top: 56px; font-size: .9rem; line-height: 1.5; }
.process .client-step { background: var(--ink); color: var(--white); }
.process .client-step::after { background: var(--ink); color: var(--accent); }
.process .client-step span { color: var(--accent); }
.boundary { display: grid; grid-template-columns: .7fr 1.3fr; gap: 48px; margin-top: 32px; padding: 28px 32px; background: var(--white); border-left: 5px solid var(--ink); }
.boundary strong { font-size: 1.2rem; }
.boundary p { margin: 0; color: var(--muted); }

.plans-section { background: var(--ink); color: var(--white); }
.plans-section .section-heading > p:last-child { color: #aeb4af; }
.plan-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; align-items: stretch; }
.plan-card { display: flex; flex-direction: column; padding: 32px 28px; border: 1px solid #454a46; background: #171b18; }
.plan-card.featured { border: 2px solid var(--accent); background: #1d221e; transform: translateY(-12px); }
.plan-badge { align-self: flex-start; min-height: 24px; margin: -2px 0 20px; padding: 3px 8px; background: var(--accent); color: var(--ink); font-size: .68rem; font-weight: 800; }
.plan-name { margin: 0; color: var(--accent); font: 700 .78rem/1.2 ui-monospace, monospace; letter-spacing: .12em; }
.plan-price { margin: 16px 0 6px; font-size: clamp(2.4rem, 3.4vw, 3.7rem); line-height: 1; font-weight: 850; font-variant-numeric: tabular-nums; }
.plan-price span { font-size: .9rem; }
.plan-purpose { min-height: 56px; margin: 22px 0; font-weight: 750; }
.plan-term { padding: 12px 0; border-block: 1px solid #393e3a; color: #c6cbc7; font-size: .8rem; }
.plan-features { margin: 24px 0 0; padding: 0; list-style: none; color: #c4c9c5; }
.plan-features li { position: relative; margin-bottom: 12px; padding-left: 18px; font-size: .83rem; }
.plan-features li::before { content: "+"; position: absolute; left: 0; color: var(--accent); }
.plan-note { margin: 28px 0 36px; color: #a3aaa4; font-size: .78rem; }
.center { text-align: center; }

.second-section { background: var(--accent); }
.second-grid { display: grid; grid-template-columns: .4fr 1.1fr 1fr; gap: 52px; align-items: start; }
.second-index { font-size: clamp(6rem, 12vw, 11rem); line-height: .8; font-weight: 900; letter-spacing: -.08em; opacity: .13; }
.second-section .section-number { color: #49640d; }
.second-section h2 { font-size: clamp(2rem, 3.8vw, 4.1rem); }

.operator-section { background: var(--white); }
.operator-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(48px, 9vw, 128px); }
.operator-stats { margin: 0; border-top: 2px solid var(--ink); }
.operator-stats div { display: grid; grid-template-columns: .8fr 1.2fr; align-items: baseline; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.operator-stats dt { color: var(--muted); font-size: .78rem; }
.operator-stats dd { margin: 0; font-size: clamp(1.2rem, 2vw, 1.75rem); line-height: 1.4; font-weight: 800; }

.fit-grid { display: grid; grid-template-columns: repeat(2,1fr); }
.fit-grid article { padding: clamp(28px,4vw,52px); }
.good-fit { background: var(--ink); color: var(--white); }
.not-fit { border: 1px solid var(--line); }
.fit-label { margin: 0 0 40px; color: var(--accent-deep); font: 700 .7rem/1.2 ui-monospace, monospace; letter-spacing: .15em; }
.good-fit .fit-label { color: var(--accent); }
.fit-grid h3 { max-width: 400px; margin: 0 0 28px; font-size: clamp(1.35rem, 2vw, 1.9rem); }
.fit-grid ul { margin: 0; padding: 0; list-style: none; }
.fit-grid li { position: relative; padding: 11px 0 11px 24px; border-bottom: 1px solid rgba(128,134,129,.28); font-size: .9rem; }
.fit-grid li::before { content: "—"; position: absolute; left: 0; color: var(--accent-deep); }
.good-fit li::before { color: var(--accent); }

.faq-section { background: var(--white); }
.faq-grid { display: grid; grid-template-columns: .6fr 1.4fr; gap: clamp(48px, 8vw, 110px); align-items: start; }
.faq-list { border-top: 2px solid var(--ink); }
details { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 28px 52px 28px 0; cursor: pointer; font-weight: 750; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 10px; top: 50%; transform: translateY(-50%); color: var(--accent-deep); font-size: 1.5rem; }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 52px 28px 0; color: var(--muted); }

.final-cta { padding-block: clamp(100px, 13vw, 180px); background: var(--ink); color: var(--white); text-align: center; }
.final-inner { max-width: 1000px; }
.final-cta h2 { margin-inline: auto; }
.final-cta h2 + p { margin: 0 0 36px; color: #bac0bb; }
.final-cta .cta-note { margin-inline: auto; }
.site-footer { background: var(--ink); color: #a9afa9; border-top: 1px solid #333833; padding: 28px 0 100px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; font-size: .78rem; }
.footer-inner p { margin: 0; }
.footer-inner a { display: inline-flex; min-height: 44px; align-items: center; }
.sticky-cta { display: none; }

.reveal { animation: rise .6s ease-out both; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { animation: none; } .cta { transition: none; } }

@media (max-width: 900px) {
  .hero-grid, .diagnosis-layout, .report-grid, .philosophy-grid, .operator-grid, .faq-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 720px; }
  .equation-card { min-height: 500px; }
  .proof-strip { grid-template-columns: repeat(2,1fr); }
  .proof-strip div { border-bottom: 1px solid #333834; }
  .diagnosis-layout .section-heading { position: static; }
  .factor-grid { grid-template-columns: repeat(2,1fr); }
  .factor-grid article, .factor-grid article:nth-child(3n), .factor-grid article:nth-child(n+4) { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .factor-grid article:nth-child(2n) { border-right: 0; }
  .factor-grid article:nth-child(n+5) { border-bottom: 0; }
  .process { grid-template-columns: repeat(3,1fr); }
  .process li:nth-child(3) { border-right: 0; }
  .process li:nth-child(-n+3) { border-bottom: 1px solid #bcc2bc; }
  .process li:nth-child(3)::after { display: none; }
  .plan-grid { grid-template-columns: 1fr; max-width: 680px; margin-inline: auto; }
  .plan-card.featured { transform: none; }
  .plan-purpose { min-height: auto; }
  .second-grid { grid-template-columns: .3fr 1.7fr; }
  .second-grid .large-copy { grid-column: 2; }
}

@media (max-width: 600px) {
  body { padding-bottom: 74px; }
  .site-header { position: absolute; }
  .header-inner { min-height: 66px; }
  .brand { font-size: .7rem; }
  .brand-mark { width: 32px; height: 32px; }
  .text-link { display: none; }
  .hero { padding-top: 112px; }
  h1 { font-size: clamp(2.5rem, 12vw, 3.5rem); }
  .hero-statement { font-size: 1.6rem; }
  .hero-lead { font-size: .95rem; }
  .cta { width: 100%; font-size: .87rem; }
  .equation-card { grid-template-columns: 1fr; min-height: auto; }
  .equation-side { padding: 28px 24px 34px; }
  .equation-side + .equation-side { border-left: 0; border-top: 1px solid #3d423e; padding-bottom: 88px; }
  .equation-side h2 { margin: 26px 0 20px; }
  .not-equal { top: 50%; width: 56px; height: 56px; font-size: 1.7rem; }
  .equation-conclusion { padding: 18px; font-size: .85rem; }
  .proof-strip { margin-top: 52px; }
  .proof-strip div { padding: 22px 14px; }
  .proof-strip strong { font-size: 1.2rem; }
  .section { padding-block: 82px; }
  .section h2, .final-cta h2 { font-size: clamp(2rem, 10vw, 3rem); }
  .section-number { margin-bottom: 20px; }
  .two-col-copy { grid-template-columns: 1fr; gap: 18px; margin-top: 32px; padding-top: 32px; }
  .diagnosis-layout .cta { display: none; }
  .checklist li { padding-block: 20px; padding-left: 42px; font-size: .92rem; }
  .checklist li::before { top: 27px; }
  .profit-structure { margin-inline: calc(var(--pad) * -.35); }
  .cost-grid { grid-template-columns: repeat(2,1fr); }
  .factor-grid { grid-template-columns: 1fr; }
  .factor-grid article, .factor-grid article:nth-child(2n), .factor-grid article:nth-child(n+5) { min-height: 180px; border-right: 0; border-bottom: 1px solid var(--line); }
  .factor-grid article:last-child { border-bottom: 0; }
  .factor-grid h3 { margin-top: 22px; }
  .review-grid { grid-template-columns: 1fr; }
  .review-grid div:nth-child(odd) { border-right: 0; }
  .process { grid-template-columns: 1fr; }
  .process li, .process li:nth-child(3), .process li:nth-child(-n+3) { min-height: 100px; border-right: 0; border-bottom: 1px solid #bcc2bc; }
  .process li:last-child { border-bottom: 0; }
  .process li::after, .process li:nth-child(3)::after { display: block; content: "↓"; left: 50%; right: auto; top: auto; bottom: -14px; transform: translateX(-50%); }
  .process li:last-child::after { display: none; }
  .process strong { margin-top: 24px; }
  .boundary { grid-template-columns: 1fr; gap: 10px; padding: 24px 22px; }
  .plan-card { padding: 28px 22px; }
  .second-grid { grid-template-columns: 1fr; gap: 30px; }
  .second-index { font-size: 7rem; }
  .second-grid .large-copy { grid-column: auto; }
  .operator-stats div { grid-template-columns: 1fr; gap: 4px; }
  .fit-grid { grid-template-columns: 1fr; }
  .faq-list { margin-top: 10px; }
  summary { padding-block: 22px; }
  details p { padding-right: 0; }
  .final-cta { padding-block: 94px; }
  .final-cta h2 br:nth-of-type(2) { display: none; }
  .footer-inner { flex-direction: column; }
  .sticky-cta { position: fixed; z-index: 20; inset: auto 0 0; display: block; padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); background: rgba(16,19,17,.95); backdrop-filter: blur(10px); }
  .sticky-cta a { display: flex; min-height: 52px; align-items: center; justify-content: space-between; padding: 10px 16px; background: var(--accent); color: var(--ink); text-decoration: none; font-size: .9rem; font-weight: 850; }
}