:root {
  --ink: #101a30;
  --navy: #07132e;
  --navy-2: #0a1d43;
  --cobalt: #2868ff;
  --cyan: #45d4ff;
  --magenta: #b34cff;
  --paper: #f6f8fc;
  --white: #ffffff;
  --line: #d9e0ec;
  --muted: #65718a;
  --max: 1240px;
  --shadow: 0 28px 80px rgba(7, 19, 46, .16);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.skip-link { position: fixed; z-index: 999; left: 1rem; top: 1rem; padding: .7rem 1rem; background: var(--white); color: var(--navy); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  min-height: 84px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: rgba(246, 248, 252, .94);
  border-bottom: 1px solid rgba(16, 26, 48, .1);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 16px; flex: 0 0 auto; }
.brand img { width: clamp(225px, 24vw, 310px); height: auto; }
.brand > span { padding-left: 16px; border-left: 1px solid var(--line); color: var(--muted); font-size: .66rem; font-weight: 800; letter-spacing: .16em; white-space: nowrap; }
.global-nav { display: flex; align-items: center; gap: 26px; font-size: .84rem; font-weight: 700; }
.global-nav a { white-space: nowrap; }
.global-nav a:not(.nav-cta):hover { color: var(--cobalt); }
.nav-cta { padding: 11px 18px; color: var(--white); background: var(--navy); border: 1px solid var(--navy); }
.nav-cta:hover { background: var(--cobalt); border-color: var(--cobalt); }
.menu-button { display: none; border: 0; background: transparent; color: var(--ink); cursor: pointer; }

.hero { background: linear-gradient(135deg, #f8faff 0%, #eef3fd 100%); overflow: hidden; }
.hero-grid {
  width: min(calc(100% - 48px), var(--max));
  min-height: 670px;
  margin: 0 auto;
  padding: 76px 0 66px;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(390px, .88fr);
  align-items: center;
  gap: clamp(50px, 7vw, 100px);
}
.eyebrow, .section-number, .service-label {
  margin: 0 0 24px;
  color: var(--cobalt);
  font-size: .76rem;
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: .19em;
}
.hero h1 {
  max-width: 780px;
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2.8rem, 5.3vw, 5.35rem);
  line-height: 1.24;
  letter-spacing: -.045em;
}
.hero-lead { max-width: 730px; margin: 30px 0 0; color: #3d4961; font-size: clamp(1rem, 1.5vw, 1.13rem); line-height: 2; }
.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 54px; padding: 14px 22px; display: inline-flex; align-items: center; justify-content: center; gap: 18px; border: 1px solid transparent; font-weight: 800; letter-spacing: .03em; transition: transform .2s, background-color .2s, border-color .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--cobalt); color: var(--white); box-shadow: 0 14px 35px rgba(40, 104, 255, .24); }
.button-primary:hover { background: #1155ef; }
.button-secondary { border-color: #a9b5c9; background: rgba(255, 255, 255, .7); }
.hero-meta { margin: 28px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 7px 22px; color: var(--muted); font-size: .84rem; font-weight: 700; }
.hero-meta li::before { content: "—"; margin-right: 8px; color: var(--cobalt); }

.hero-visual { position: relative; min-height: 530px; }
.hero-visual::before { content: ""; position: absolute; inset: 8% -15% 2% 8%; border-radius: 50%; background: radial-gradient(circle, rgba(69, 212, 255, .35), rgba(179, 76, 255, .1) 47%, transparent 70%); filter: blur(4px); }
.visual-frame { position: absolute; inset: 0 58px 0 54px; overflow: hidden; background: var(--navy); box-shadow: var(--shadow); border: 1px solid rgba(7,19,46,.18); transform: rotate(1.5deg); }
.visual-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.visual-frame::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(7,19,46,.82) 0, transparent 27%); pointer-events: none; }
.visual-caption { position: absolute; z-index: 1; left: 22px; right: 22px; bottom: 18px; color: rgba(255,255,255,.86); font-size: .7rem; line-height: 1.6; letter-spacing: .04em; }
.signal-card { position: absolute; z-index: 2; width: 155px; padding: 14px 15px; display: grid; background: rgba(255,255,255,.94); border: 1px solid rgba(16,26,48,.12); box-shadow: 0 16px 35px rgba(7,19,46,.13); }
.signal-card b { color: var(--cobalt); font-size: .72rem; letter-spacing: .17em; }
.signal-card span { margin-top: 3px; font-size: .82rem; font-weight: 800; }
.signal-one { left: 0; top: 7%; }
.signal-two { right: -8px; top: 28%; }
.signal-three { left: 4px; bottom: 24%; }
.signal-four { right: 2px; bottom: 5%; }
.proof-strip { max-width: var(--max); margin: 0 auto; padding: 0 0 28px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.proof-strip div { min-height: 118px; padding: 25px 30px; border-right: 1px solid var(--line); display: grid; align-content: center; }
.proof-strip div:first-child { border-left: 1px solid var(--line); }
.proof-strip strong { font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.65rem; letter-spacing: -.02em; }
.proof-strip span { margin-top: 3px; color: var(--muted); font-size: .76rem; font-weight: 700; }

.field-reality { border-bottom: 1px solid var(--line); }
.field-case-list { margin-top: 64px; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.field-case { min-height: 440px; padding: 36px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.6); }
.field-case-wide { grid-column: 1 / -1; min-height: 0; color: var(--white); background: linear-gradient(125deg, var(--navy) 0%, #102d70 100%); }
.field-case-head > span { color: var(--cobalt); font-size: .7rem; font-weight: 800; letter-spacing: .16em; }
.field-case-wide .field-case-head > span { color: var(--cyan); }
.field-case-head h3 { max-width: 960px; margin: 20px 0 30px; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(1.4rem, 2.4vw, 2.25rem); line-height: 1.6; }
.field-case-body { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border-top: 1px solid var(--line); }
.field-case-wide .field-case-body { grid-template-columns: repeat(3, 1fr); border-color: rgba(255,255,255,.18); }
.field-case-body > div { padding: 24px 25px 0 0; }
.field-case-body > div + div { padding-left: 25px; border-left: 1px solid var(--line); }
.field-case-wide .field-case-body > div + div { border-color: rgba(255,255,255,.18); }
.field-case-body h4 { margin: 0 0 10px; color: var(--cobalt); font-size: .78rem; letter-spacing: .08em; }
.field-case-wide .field-case-body h4 { color: var(--cyan); }
.field-case-body p { margin: 0; color: var(--muted); font-size: .88rem; line-height: 1.9; }
.field-case-wide .field-case-body p { color: #d6e1f4; }
.field-disclaimer { padding: 22px 26px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; border: 1px solid var(--line); border-top: 0; background: #eaf0fb; }
.field-disclaimer p { margin: 0; color: #4a5871; font-size: .78rem; line-height: 1.75; }
.field-disclaimer strong { margin-right: 8px; color: var(--navy); }

.section { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; padding: 110px 0; }
.section-intro { display: grid; grid-template-columns: minmax(240px, .9fr) minmax(400px, 1.4fr); column-gap: 8vw; align-items: start; }
.section-intro .section-number { grid-column: 1; }
.section-intro h2 { grid-column: 1; margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(2rem, 3.7vw, 3.8rem); line-height: 1.35; letter-spacing: -.035em; }
.section-intro > p:last-child { grid-column: 2; grid-row: 1 / span 2; margin: 43px 0 0; max-width: 610px; color: var(--muted); font-size: 1rem; line-height: 2; }
.problem-section { display: grid; grid-template-columns: minmax(300px, .9fr) minmax(0, 1.5fr); gap: 8vw; }
.problem-section .section-intro { display: block; }
.problem-section .section-intro h2 { margin: 0; }
.large-copy { margin: 42px 0 50px; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(1.35rem, 2.2vw, 2.05rem); line-height: 1.7; }
.risk-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.risk-grid article { min-height: 230px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.risk-grid span, .service-index, .deliverable-list span { color: var(--cobalt); font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.risk-grid h3 { margin: 30px 0 10px; font-size: 1.06rem; line-height: 1.5; }
.risk-grid p { margin: 0; color: var(--muted); font-size: .88rem; line-height: 1.8; }

.dark-section { position: relative; width: 100%; max-width: none; padding: 110px max(24px, calc((100vw - var(--max)) / 2)); color: var(--white); background: var(--navy); }
.dark-section::before { content: ""; position: absolute; left: 0; top: 0; width: 35%; height: 3px; background: linear-gradient(90deg, var(--cyan), var(--magenta)); }
.section-intro.light .section-number { color: var(--cyan); }
.section-intro.light > p:last-child { color: #aebbd4; }
.department-panel { margin-top: 64px; border: 1px solid rgba(255,255,255,.15); }
.tab-list { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid rgba(255,255,255,.15); }
.tab-list button { padding: 22px 26px; border: 0; border-right: 1px solid rgba(255,255,255,.15); color: #aebbd4; background: transparent; text-align: left; font-size: 1rem; font-weight: 800; cursor: pointer; }
.tab-list button:last-child { border-right: 0; }
.tab-list button span { margin-right: 14px; color: var(--cyan); font-size: .7rem; }
.tab-list button[aria-selected="true"] { color: var(--navy); background: var(--white); }
.tab-panel { padding: clamp(30px, 5vw, 65px); }
.panel-heading { display: grid; grid-template-columns: 1fr 2fr; gap: 30px; margin-bottom: 46px; }
.panel-heading p { margin: 7px 0 0; color: var(--cyan); font-size: .7rem; font-weight: 800; letter-spacing: .16em; }
.panel-heading h3 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(1.65rem, 3vw, 2.7rem); line-height: 1.45; }
.panel-columns { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.17); }
.panel-columns > div { padding: 28px 28px 0 0; }
.panel-columns > div + div { padding-left: 28px; border-left: 1px solid rgba(255,255,255,.17); }
.panel-columns h4 { margin: 0 0 17px; color: var(--cyan); font-size: .78rem; letter-spacing: .1em; }
.panel-columns ul { margin: 0; padding: 0; list-style: none; color: #dce4f3; font-size: .9rem; }
.panel-columns li { position: relative; padding: 9px 0 9px 18px; border-bottom: 1px solid rgba(255,255,255,.1); }
.panel-columns li::before { content: ""; position: absolute; left: 0; top: 20px; width: 6px; height: 6px; border: 1px solid var(--cyan); transform: rotate(45deg); }

.service-grid { margin-top: 64px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service-card { min-height: 360px; padding: 32px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.55); }
.service-card.featured { color: var(--white); background: linear-gradient(140deg, var(--navy-2), #15317a); }
.service-card .service-label { margin: 52px 0 11px; font-size: .65rem; }
.service-card.featured .service-label, .service-card.featured .service-index { color: var(--cyan); }
.service-card h3 { margin: 0 0 18px; font-size: 1.25rem; line-height: 1.5; }
.service-card p:not(.service-label) { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.9; }
.service-card.featured p:not(.service-label) { color: #cad6ee; }
.service-card ul { margin: 25px 0 0; padding: 0; list-style: none; font-size: .84rem; }
.service-card li { padding: 6px 0; border-bottom: 1px solid rgba(255,255,255,.14); }

.insights { border-top: 1px solid var(--line); }
.incident-feature { margin-top: 64px; padding: 42px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 55px; color: var(--white); background: linear-gradient(128deg, var(--navy) 0%, #123988 100%); box-shadow: var(--shadow); }
.incident-feature h3 { margin: 0; max-width: 690px; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(1.65rem, 3vw, 2.75rem); line-height: 1.5; }
.incident-feature > div > p:not(.insight-kicker) { margin: 20px 0 0; color: #cbd8ef; }
.incident-feature .insight-kicker { color: var(--cyan); }
.incident-route { padding-left: 40px; border-left: 1px solid rgba(255,255,255,.2); }
.incident-route > span { color: var(--cyan); font-size: .72rem; font-weight: 800; letter-spacing: .12em; }
.incident-route p { font-size: .86rem; line-height: 1.9; }
.incident-route a { margin-top: 25px; padding-bottom: 5px; display: inline-flex; gap: 35px; border-bottom: 1px solid var(--white); font-weight: 800; }
.insight-grid { margin-top: 64px; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.insight-card { min-height: 445px; padding: 38px; display: flex; flex-direction: column; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.58); }
.insight-card:nth-child(1), .insight-card:nth-child(4) { background: linear-gradient(145deg, #fff 0%, #edf3ff 100%); }
.insight-kicker { margin: 0 0 28px; color: var(--cobalt); font-size: .7rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.insight-card h3 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(1.35rem, 2vw, 1.85rem); line-height: 1.55; }
.insight-card > p:not(.insight-kicker) { margin: 21px 0 25px; color: var(--muted); font-size: .9rem; line-height: 1.9; }
.insight-card dl { margin: auto 0 25px; border-top: 1px solid var(--line); }
.insight-card dl div { padding: 12px 0; display: grid; grid-template-columns: 74px 1fr; gap: 14px; border-bottom: 1px solid var(--line); }
.insight-card dt { color: var(--cobalt); font-size: .72rem; font-weight: 800; }
.insight-card dd { margin: 0; font-size: .82rem; }
.insight-card > a { width: fit-content; display: inline-flex; gap: 35px; padding-bottom: 5px; border-bottom: 1px solid var(--ink); font-weight: 800; }
.insight-card > a:hover { color: var(--cobalt); border-color: var(--cobalt); }
.conversion-panel { margin-top: 48px; padding: 42px; display: grid; grid-template-columns: 1fr 1.15fr .7fr; gap: 45px; align-items: start; color: var(--white); background: linear-gradient(125deg, var(--navy) 0%, #102b69 100%); box-shadow: var(--shadow); }
.conversion-panel .section-number { color: var(--cyan); }
.conversion-panel h3 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.55rem; line-height: 1.55; }
.conversion-panel ul { margin: 0; padding: 0; list-style: none; color: #dce5f6; font-size: .86rem; }
.conversion-panel li { position: relative; padding: 9px 0 9px 20px; border-bottom: 1px solid rgba(255,255,255,.13); }
.conversion-panel li::before { content: ""; position: absolute; left: 1px; top: 20px; width: 7px; height: 7px; border: 1px solid var(--cyan); transform: rotate(45deg); }
.conversion-action p { margin: 15px 0 0; color: #aebbd4; font-size: .76rem; }

.architecture { display: grid; grid-template-columns: minmax(300px, .85fr) minmax(0, 1.2fr); gap: 9vw; align-items: start; }
.architecture h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(2rem, 3.7vw, 3.8rem); line-height: 1.35; letter-spacing: -.035em; }
.architecture-copy > p:not(.section-number) { margin: 30px 0; color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 35px; padding-bottom: 6px; border-bottom: 1px solid var(--ink); font-weight: 800; }
.text-link:hover { color: var(--cobalt); border-color: var(--cobalt); }
.flow-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.flow-list li { min-height: 108px; padding: 21px 0; display: grid; grid-template-columns: 80px 130px 1fr; align-items: center; border-bottom: 1px solid var(--line); }
.flow-list li > span { color: var(--cobalt); font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.flow-list div { display: contents; }
.flow-list b { font-size: 1.05rem; }
.flow-list p { margin: 0; color: var(--muted); font-size: .88rem; }

.deliverable-list { margin-top: 64px; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid rgba(255,255,255,.17); border-left: 1px solid rgba(255,255,255,.17); }
.deliverable-list > div { min-height: 150px; padding: 28px; display: grid; grid-template-columns: 55px 190px 1fr; align-items: center; border-right: 1px solid rgba(255,255,255,.17); border-bottom: 1px solid rgba(255,255,255,.17); }
.deliverable-list span { color: var(--cyan); }
.deliverable-list h3 { margin: 0; font-size: 1rem; }
.deliverable-list p { margin: 0; color: #aebbd4; font-size: .84rem; line-height: 1.7; }

.engagement-body { margin-top: 64px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(300px, .6fr); gap: 70px; }
.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { padding: 29px 0; display: grid; grid-template-columns: 110px 1fr; gap: 28px; border-bottom: 1px solid var(--line); }
.steps > li > span { padding-top: 5px; color: var(--cobalt); font-size: .7rem; font-weight: 800; letter-spacing: .12em; }
.steps h3 { margin: 0 0 6px; font-size: 1.08rem; }
.steps p { margin: 0; color: var(--muted); font-size: .9rem; }
.start-card { padding: 38px; background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow); }
.start-card > p { margin: 0; color: var(--cobalt); font-size: .68rem; font-weight: 800; letter-spacing: .14em; }
.start-card h3 { margin: 18px 0 24px; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.55rem; line-height: 1.5; }
.start-card ul { margin: 0; padding: 0; list-style: none; }
.start-card li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .9rem; }
.start-card li::before { content: "＋"; margin-right: 12px; color: var(--cobalt); font-weight: 800; }
.start-card small { display: block; margin-top: 24px; color: var(--muted); font-size: .76rem; line-height: 1.8; }
.message-template { display: grid; grid-template-columns: 30px 1fr; align-items: center; border-top: 1px solid var(--line); }
.message-template span, .message-template p { margin: 0; padding: 9px 0; border-bottom: 1px solid var(--line); }
.message-template span { color: var(--cobalt); font-size: .72rem; font-weight: 800; }
.message-template p { font-size: .86rem; }
.start-card blockquote { margin: 24px 0 0; padding: 18px 20px; border-left: 3px solid var(--cobalt); background: #eef4ff; color: #34425b; font-size: .82rem; line-height: 1.9; }

.profile { display: grid; grid-template-columns: minmax(300px, .8fr) minmax(0, 1.2fr); gap: 9vw; border-top: 1px solid var(--line); }
.profile .role { margin: 42px 0 4px; color: var(--muted); font-size: .84rem; font-weight: 700; letter-spacing: .1em; }
.profile-name h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(3rem, 5.3vw, 5.2rem); line-height: 1.2; letter-spacing: .04em; }
.profile .roman { margin: 8px 0 0; color: var(--cobalt); font-weight: 800; letter-spacing: .2em; }
.profile-copy > h3 { margin: 35px 0 20px; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(1.45rem, 2.5vw, 2.25rem); line-height: 1.55; }
.profile-copy > p { color: var(--muted); }
.credentials { margin: 35px 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.credentials > div { padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.credentials span { color: var(--cobalt); font-size: .7rem; font-weight: 800; letter-spacing: .12em; }
.credentials p { margin: 12px 0 0; font-size: .82rem; line-height: 1.8; }
.scope-note { padding: 18px 20px; background: #e9edf5; font-size: .78rem; line-height: 1.8; }

.sources { border-top: 1px solid var(--line); }
.source-list { margin-top: 58px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.source-list a { min-height: 190px; padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.45); transition: background-color .2s, transform .2s; }
.source-list a:hover { background: var(--white); transform: translateY(-3px); }
.source-list span { color: var(--cobalt); font-size: .68rem; font-weight: 800; letter-spacing: .13em; }
.source-list h3 { margin: 29px 0 8px; font-size: .98rem; line-height: 1.55; }
.source-list p { margin: 0; color: var(--muted); font-size: .78rem; }

.faq { border-top: 1px solid var(--line); }
.faq-list { margin: 58px 0 0 auto; max-width: 850px; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 25px 50px 25px 0; font-weight: 800; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "＋"; position: absolute; right: 6px; top: 23px; color: var(--cobalt); font-size: 1.25rem; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { margin: -5px 50px 26px 0; color: var(--muted); font-size: .9rem; }

.contact-section { padding: 92px max(24px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1.1fr .9fr; gap: 9vw; color: var(--white); background: linear-gradient(115deg, #0c2d7c 0%, #164ed2 58%, #6529bb 100%); }
.contact-section .section-number { color: var(--cyan); }
.contact-section h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(2.1rem, 4.1vw, 4.2rem); line-height: 1.35; letter-spacing: -.04em; }
.contact-copy { padding-top: 42px; }
.contact-copy > p:first-child { max-width: 560px; margin: 0 0 30px; color: #e0e9ff; }
.button-light { background: var(--white); color: var(--navy); }
.button-light:hover { background: #e9f4ff; }
.contact-note { margin: 20px 0 0; color: #cbdcff; font-size: .78rem; }

.site-footer { padding: 58px max(24px, calc((100vw - var(--max)) / 2)) 28px; color: #bdc8db; background: #050d20; }
.footer-brand { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.14); }
.footer-brand strong { color: var(--white); font-size: .76rem; letter-spacing: .18em; }
.footer-logo { width: min(390px, 70vw); padding: 10px 14px; display: block; background: var(--white); }
.footer-logo img { width: 100%; height: auto; }
.footer-links { padding: 26px 0; display: flex; flex-wrap: wrap; gap: 16px 30px; font-size: .8rem; border-bottom: 1px solid rgba(255,255,255,.14); }
.footer-links a:hover { color: var(--white); }
.trademark { max-width: 920px; margin: 24px 0; color: #7d8aa1; font-size: .72rem; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 9px 30px; color: #7d8aa1; font-size: .72rem; }

.article-page { background: linear-gradient(180deg, #eef3fd 0, var(--paper) 490px); }
.article-hero { width: min(calc(100% - 48px), 1060px); margin: 0 auto; padding: 80px 0 62px; }
.article-breadcrumb { margin: 0 0 34px; color: var(--muted); font-size: .8rem; }
.article-breadcrumb a { color: var(--cobalt); font-weight: 800; }
.article-hero h1 { max-width: 920px; margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(2.5rem, 5vw, 4.9rem); line-height: 1.32; letter-spacing: -.04em; }
.article-deck { max-width: 800px; margin: 30px 0 0; color: #3d4961; font-size: 1.08rem; line-height: 2; }
.article-meta { margin: 30px 0 0; padding-top: 19px; display: flex; flex-wrap: wrap; gap: 10px 24px; border-top: 1px solid #cbd5e5; color: var(--muted); font-size: .78rem; font-weight: 700; }
.article-wrap { width: min(calc(100% - 48px), 1060px); margin: 0 auto; padding: 0 0 110px; display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 72px; align-items: start; }
.article-body { padding: 58px 64px; background: var(--white); border: 1px solid var(--line); box-shadow: 0 24px 65px rgba(7,19,46,.09); }
.article-lead { margin: 0 0 45px; padding: 25px 28px; border-left: 4px solid var(--cobalt); background: #eef4ff; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.22rem; line-height: 1.8; }
.article-body h2 { margin: 62px 0 20px; padding-top: 16px; border-top: 1px solid var(--line); font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(1.7rem, 3vw, 2.45rem); line-height: 1.5; }
.article-body h2:first-of-type { margin-top: 0; }
.article-body h3 { margin: 34px 0 12px; font-size: 1.15rem; line-height: 1.6; }
.article-body p { margin: 0 0 22px; color: #39465e; line-height: 2; }
.article-body ul, .article-body ol { margin: 20px 0 30px; padding-left: 1.4rem; color: #39465e; }
.article-body li { margin: 10px 0; padding-left: 5px; }
.article-body a { color: #174fb9; text-decoration: underline; text-underline-offset: 3px; }
.fact-box, .deliverable-box { margin: 35px 0; padding: 28px; border: 1px solid var(--line); background: #f7f9fd; }
.fact-box h3, .deliverable-box h3 { margin-top: 0; color: var(--cobalt); font-size: .82rem; letter-spacing: .08em; }
.fact-box p:last-child, .deliverable-box p:last-child { margin-bottom: 0; }
.field-note { margin: 35px 0; padding: 28px; color: var(--white); background: linear-gradient(130deg, var(--navy) 0%, #13357a 100%); }
.field-note > p:first-child { margin: 0 0 16px; color: var(--cyan); font-size: .72rem; font-weight: 800; letter-spacing: .12em; }
.field-note h3 { margin: 0 0 16px; color: var(--white); font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.35rem; }
.field-note p { color: #d4dff0; }
.field-note p:last-child { margin-bottom: 0; }
.incident-layers { margin: 32px 0; padding: 0; list-style: none; counter-reset: incident-layer; border-top: 1px solid var(--line); }
.incident-layers li { position: relative; margin: 0; padding: 20px 0 20px 58px; border-bottom: 1px solid var(--line); counter-increment: incident-layer; }
.incident-layers li::before { content: counter(incident-layer, decimal-leading-zero); position: absolute; left: 0; top: 22px; color: var(--cobalt); font-size: .72rem; font-weight: 800; letter-spacing: .1em; }
.incident-layers b { display: block; margin-bottom: 5px; color: var(--ink); }
.solution-steps { padding: 0; list-style: none; counter-reset: solve; }
.solution-steps li { position: relative; margin: 0; padding: 22px 0 22px 58px; border-bottom: 1px solid var(--line); counter-increment: solve; }
.solution-steps li::before { content: counter(solve, decimal-leading-zero); position: absolute; left: 0; top: 23px; color: var(--cobalt); font-size: .72rem; font-weight: 800; letter-spacing: .12em; }
.solution-steps b { display: block; margin-bottom: 4px; color: var(--ink); }
.article-aside { position: sticky; top: 110px; }
.article-cta { padding: 30px; color: var(--white); background: var(--navy); box-shadow: var(--shadow); }
.article-cta p:first-child { margin: 0 0 13px; color: var(--cyan); font-size: .7rem; font-weight: 800; letter-spacing: .12em; }
.article-cta h2 { margin: 0 0 16px; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.35rem; line-height: 1.55; }
.article-cta > p:not(:first-child) { color: #becbe0; font-size: .82rem; line-height: 1.8; }
.article-cta .button { width: 100%; margin-top: 15px; background: var(--white); color: var(--navy); }
.aside-index { margin-top: 22px; padding: 24px; border: 1px solid var(--line); background: var(--white); }
.aside-index p { margin: 0 0 14px; color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .1em; }
.aside-index a { display: block; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: .8rem; line-height: 1.5; }
.aside-index a:hover { color: var(--cobalt); }
.article-source { margin-top: 45px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: .78rem; }
.article-source h2 { margin: 0 0 15px; padding: 0; border: 0; font-family: inherit; font-size: .85rem; letter-spacing: .08em; }
.article-source p { font-size: .78rem; line-height: 1.7; }

@media (max-width: 1050px) {
  .global-nav { gap: 16px; }
  .global-nav a:not(.nav-cta) { display: none; }
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(350px, .78fr); gap: 35px; }
  .visual-frame { inset: 25px 30px 20px; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .deliverable-list > div { grid-template-columns: 50px 170px 1fr; }
  .credentials { grid-template-columns: 1fr; }
  .conversion-panel { grid-template-columns: 1fr 1.2fr; }
  .conversion-action { grid-column: 1 / -1; }
  .article-wrap { gap: 35px; }
  .article-body { padding: 46px 42px; }
  .field-case { min-height: 0; }
}

@media (max-width: 800px) {
  .site-header { min-height: 72px; padding: 0 20px; }
  .brand img { width: min(260px, 54vw); }
  .brand > span { display: none; }
  .menu-button { width: 50px; height: 50px; display: grid; place-items: center; font-size: .65rem; font-weight: 800; letter-spacing: .12em; }
  .menu-button i, .menu-button i::before { content: ""; display: block; width: 24px; height: 1px; background: var(--ink); transition: transform .2s; }
  .menu-button i::before { transform: translateY(-7px); }
  .menu-button[aria-expanded="true"] i { transform: rotate(45deg); }
  .menu-button[aria-expanded="true"] i::before { transform: rotate(-90deg); }
  .global-nav { position: absolute; left: 0; right: 0; top: 72px; padding: 15px 20px 22px; display: none; align-items: stretch; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 20px 30px rgba(7,19,46,.12); }
  .global-nav.open { display: grid; }
  .global-nav a:not(.nav-cta) { display: block; padding: 13px 0; border-bottom: 1px solid var(--line); }
  .nav-cta { margin-top: 13px; text-align: center; }
  .hero-grid { width: min(calc(100% - 36px), var(--max)); padding: 54px 0 45px; grid-template-columns: 1fr; }
  .hero h1 br { display: none; }
  .hero-visual { min-height: 520px; }
  .visual-frame { inset: 5px 55px 10px; }
  .proof-strip { grid-template-columns: repeat(2, 1fr); padding: 0 18px 25px; }
  .proof-strip div:nth-child(3) { border-left: 1px solid var(--line); }
  .section, .dark-section { width: 100%; padding: 82px 20px; }
  .section-intro { grid-template-columns: 1fr; }
  .section-intro > p:last-child { grid-column: 1; grid-row: auto; margin: 25px 0 0; }
  .problem-section, .architecture, .profile { grid-template-columns: 1fr; gap: 40px; }
  .large-copy { margin-top: 0; }
  .tab-list { grid-template-columns: 1fr; }
  .tab-list button { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.15); }
  .tab-list button:last-child { border-bottom: 0; }
  .panel-heading { grid-template-columns: 1fr; gap: 8px; }
  .panel-columns { grid-template-columns: 1fr; }
  .panel-columns > div, .panel-columns > div + div { padding: 24px 0; border-left: 0; border-bottom: 1px solid rgba(255,255,255,.17); }
  .deliverable-list { grid-template-columns: 1fr; }
  .deliverable-list > div { grid-template-columns: 48px 170px 1fr; }
  .engagement-body { grid-template-columns: 1fr; gap: 45px; }
  .profile { border-top: 0; }
  .profile-copy > h3 { margin-top: 0; }
  .source-list { grid-template-columns: repeat(2, 1fr); }
  .contact-section { grid-template-columns: 1fr; gap: 10px; padding: 78px 20px; }
  .footer-brand { align-items: flex-start; flex-direction: column; }
  .conversion-panel { grid-template-columns: 1fr; padding: 32px 26px; }
  .conversion-action { grid-column: auto; }
  .field-case-list { grid-template-columns: 1fr; }
  .field-case-wide { grid-column: auto; }
  .field-case-wide .field-case-body { grid-template-columns: 1fr; }
  .field-case-wide .field-case-body > div, .field-case-wide .field-case-body > div + div { padding: 20px 0; border-left: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .field-disclaimer { grid-template-columns: 1fr; gap: 12px; }
  .incident-feature { grid-template-columns: 1fr; gap: 32px; }
  .incident-route { padding: 28px 0 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.2); }
  .article-hero, .article-wrap { width: calc(100% - 40px); }
  .article-wrap { grid-template-columns: 1fr; padding-bottom: 80px; }
  .article-aside { position: static; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .brand img { width: min(245px, 64vw); }
  .hero h1 { font-size: clamp(2.45rem, 12vw, 4rem); }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .hero-meta { display: grid; gap: 5px; }
  .hero-visual { min-height: 455px; }
  .visual-frame { inset: 5px 39px 8px; }
  .signal-card { width: 135px; padding: 10px 11px; }
  .signal-card span { font-size: .73rem; }
  .signal-two, .signal-four { right: -8px; }
  .proof-strip div { padding: 18px 16px; }
  .proof-strip strong { font-size: 1.35rem; }
  .risk-grid, .service-grid, .source-list { grid-template-columns: 1fr; }
  .risk-grid article { min-height: 0; }
  .service-card { min-height: 0; }
  .flow-list li { grid-template-columns: 48px 75px 1fr; }
  .deliverable-list > div { grid-template-columns: 43px 1fr; gap: 0 8px; }
  .deliverable-list p { grid-column: 2; margin-top: 8px; }
  .steps li { grid-template-columns: 1fr; gap: 6px; }
  .start-card { padding: 28px 23px; }
  .profile-name h2 { font-size: 3.2rem; }
  .credentials { grid-template-columns: 1fr; }
  .faq-list p { margin-right: 0; }
  .insight-grid { grid-template-columns: 1fr; }
  .insight-card { min-height: 0; padding: 28px 23px; }
  .field-case { padding: 28px 23px; }
  .field-case-body { grid-template-columns: 1fr; }
  .field-case-body > div, .field-case-body > div + div { padding: 19px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .incident-feature { padding: 30px 24px; }
  .article-hero { padding: 52px 0 42px; }
  .article-hero h1 { font-size: clamp(2.2rem, 11vw, 3.5rem); }
  .article-body { padding: 34px 23px; }
  .article-lead { padding: 20px; font-size: 1.08rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .source-list a { transition: none; }
}