:root {
  --navy: #0084d9;
  --navy-2: #005e9e;
  --blue: #006fbb;
  --aqua: #eefaff;
  --aqua-2: #d8f3ff;
  --ink: #17283a;
  --muted: #53697c;
  --line: #c9dceb;
  --paper: #fff;
  --green: #06c755;
  --warning: #9b3030;
  --warning-bg: #fff2f2;
  --radius: 14px;
  --shadow: 0 16px 38px rgba(7, 63, 108, .11);
  --sans: "BIZ UDPGothic", "Yu Gothic", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
  --serif: "Yu Mincho", "Hiragino Mincho ProN", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #f6faff; font: 16px/1.85 var(--sans); }
a { color: var(--blue); text-underline-offset: .18em; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }
.skip { position: fixed; left: 12px; top: -80px; z-index: 100; padding: 10px 14px; color: #fff; background: var(--navy); }
.skip:focus { top: 12px; }
.wrap { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.narrow { width: min(780px, calc(100% - 40px)); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 30; background: rgba(255,255,255,.96); border-top: 4px solid var(--navy); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--navy); text-decoration: none; font-weight: 900; line-height: 1.25; }
.brand-mark { width: 40px; height: 40px; display: grid; place-items: center; color: #fff; border-radius: 8px; background: linear-gradient(145deg, #22b9eb, #0078c4); box-shadow: inset 0 0 0 1px rgba(255,255,255,.30); }
.brand small { display: block; color: var(--muted); font-size: .72rem; font-weight: 600; letter-spacing: .08em; }
.global-nav { display: flex; align-items: center; gap: 24px; font-size: .9rem; font-weight: 700; }
.global-nav a { color: var(--ink); text-decoration: none; }
.global-nav .line-link, .line-link { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 18px; border-radius: 999px; color: #fff; background: var(--green); text-decoration: none; font-weight: 800; box-shadow: 0 8px 22px rgba(6,199,85,.22); }
.nav-button { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--navy); }

.hero { overflow: hidden; position: relative; padding: 78px 0 64px; color: #fff; background: #0084d9; border-bottom: 1px solid #0075c2; }
.hero::after { content: ""; position: absolute; width: 420px; height: 420px; right: -130px; bottom: -230px; border: 68px solid rgba(255,255,255,.11); border-radius: 50%; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: .92fr 1.08fr; gap: 54px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 16px; color: var(--blue); font-size: .8rem; font-weight: 900; letter-spacing: .13em; }
.eyebrow::before { content: ""; width: 28px; height: 2px; background: currentColor; }
h1, h2, h3 { margin-top: 0; color: var(--navy); line-height: 1.42; }
h1 { margin-bottom: 22px; font: 900 clamp(2.1rem, 4.5vw, 4.45rem)/1.2 var(--sans); letter-spacing: -.045em; }
h2 { margin-bottom: 16px; font: 900 clamp(1.65rem, 3vw, 2.55rem)/1.38 var(--sans); letter-spacing: -.025em; }
h3 { margin-bottom: 10px; font-size: 1.15rem; }
.hero h1 { color: #fff; }
.hero .eyebrow { color: #bfe5ff; }
.hero-lead { max-width: 650px; margin: 0; color: rgba(255,255,255,.88); font-size: 1.06rem; }
.hero-trust { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; margin-top: 24px; }
.hero-trust span { position: relative; min-height: 82px; padding: 13px 10px 11px 34px; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.32); border-radius: 10px; }
.hero-trust span::before { content: "✓"; position: absolute; left: 11px; top: 13px; display: grid; width: 17px; height: 17px; place-items: center; color: var(--navy); background: #fff; border-radius: 50%; font-size: .68rem; font-weight: 900; }
.hero-trust strong, .hero-trust small { display: block; color: #fff; line-height: 1.45; }
.hero-trust strong { font-size: .86rem; font-weight: 900; }
.hero-trust small { margin-top: 4px; color: rgba(255,255,255,.76); font-size: .68rem; }
.hero-note { margin-top: 22px; color: rgba(255,255,255,.72); font-size: .86rem; }
.quick-check { padding: 30px; color: var(--ink); background: #fff; border: 1px solid rgba(255,255,255,.62); border-top: 6px solid #72dcff; border-radius: 16px; box-shadow: 0 22px 55px rgba(0,67,105,.22); }
.quick-check h2 { margin-bottom: 8px; font-family: var(--sans); font-size: 1.4rem; }
.quick-lead { margin: 0 0 18px; color: var(--muted); font-size: .9rem; line-height: 1.65; }
.symptom-list { display: grid; gap: 10px; counter-reset: symptom; }
.symptom-button { counter-increment: symptom; display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 14px; min-height: 84px; padding: 12px 17px 12px 13px; color: var(--navy); background: #f3faff; border: 1px solid var(--line); border-radius: 12px; text-decoration: none; transition: .2s ease; }
.symptom-button::before { content: "0" counter(symptom); display: grid; width: 44px; height: 44px; place-items: center; color: #fff; background: var(--blue); border-radius: 50%; font-size: .78rem; font-weight: 900; letter-spacing: .03em; }
.symptom-button:hover { transform: translateY(-2px); border-color: var(--blue); box-shadow: 0 9px 24px rgba(7,63,108,.12); }
.symptom-button:focus-visible { outline: 3px solid #72dcff; outline-offset: 3px; }
.symptom-text { display: grid; gap: 2px; color: var(--navy); line-height: 1.45; }
.symptom-text strong { font-size: 1rem; font-weight: 900; }
.symptom-text small { color: var(--muted); font-size: .78rem; font-weight: 600; }
.symptom-arrow { color: var(--blue); font-size: 1.3rem; font-weight: 900; }

.section { padding: 80px 0; }
.section.alt { background: var(--aqua); }
.section.dark { color: #fff; background: linear-gradient(135deg, var(--navy-2), #007ab8); }
.section.dark h2, .section.dark h3 { color: #fff; }
.section-head { max-width: 720px; margin-bottom: 34px; }
.section-head p { margin-bottom: 0; color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { display: flex; flex-direction: column; min-height: 100%; padding: 28px; color: inherit; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; box-shadow: 0 8px 26px rgba(7,63,108,.055); }
.card:hover { border-color: #52bde6; }
.card-kicker { margin-bottom: 10px; color: var(--blue); font-size: .76rem; font-weight: 900; letter-spacing: .12em; }
.card p { margin: 0; color: var(--muted); }
.card .more { margin-top: auto; padding-top: 18px; color: var(--blue); font-size: .9rem; font-weight: 800; }
.guide-groups { display: grid; gap: 52px; }
.guide-group { scroll-margin-top: 100px; }
.guide-group-head { display: grid; grid-template-columns: 46px 1fr; gap: 16px; align-items: start; margin-bottom: 20px; padding-bottom: 17px; border-bottom: 2px solid var(--line); }
.guide-group-head > span { display: grid; width: 46px; height: 46px; place-items: center; color: #fff; background: var(--navy); border-radius: 50%; font-size: .78rem; font-weight: 900; }
.guide-group-head h3 { margin: 0; font-size: 1.3rem; }
.guide-group-head p { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }
.guide-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.guide-cards.two { grid-template-columns: repeat(2, 1fr); }
.guide-card { border-top: 5px solid #72c9ed; }
.guide-card h4 { margin: 0 0 10px; color: var(--navy-2); font-size: 1.08rem; line-height: 1.5; }
.service-bridge { color: #fff; background: linear-gradient(120deg, #0067aa, #0084d9); }
.service-bridge .eyebrow { color: #c8ecff; }
.service-bridge-inner { display: grid; grid-template-columns: 1.35fr .65fr; gap: 48px; align-items: center; }
.service-bridge-copy h2 { color: #fff; }
.service-bridge-copy h2 span { color: #c8f2ff; }
.service-bridge-copy > p:not(.eyebrow) { max-width: 680px; color: rgba(255,255,255,.84); }
.service-roles { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.service-roles span { padding: 7px 11px; color: #fff; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.25); border-radius: 999px; font-size: .75rem; font-weight: 800; }
.service-bridge-action { padding: 24px; background: #fff; border-radius: var(--radius); box-shadow: 0 16px 38px rgba(0,54,91,.2); }
.service-bridge-action > span { display: block; margin-bottom: 12px; color: var(--navy-2); font-weight: 900; }
.service-bridge-action a { display: flex; align-items: center; justify-content: center; min-height: 52px; padding: 10px 16px; color: #fff; background: var(--navy); border-radius: 9px; text-decoration: none; font-weight: 900; text-align: center; }
.service-bridge-action a:hover { background: var(--navy-2); }
.service-bridge-action small { display: block; margin-top: 11px; color: var(--muted); line-height: 1.55; }
.answer-box { padding: 30px; background: #fff; border-left: 5px solid var(--blue); border-radius: 0 var(--radius) var(--radius) 0; box-shadow: var(--shadow); }
.answer-box strong { color: var(--navy); font-size: 1.08rem; }
.decision-guide { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.decision-card { position: relative; min-height: 100%; padding: 27px; background: #fff; border: 1px solid var(--line); border-top: 6px solid var(--blue); border-radius: var(--radius); box-shadow: 0 10px 28px rgba(7,63,108,.07); }
.decision-card > span { display: inline-grid; width: 36px; height: 36px; margin-bottom: 16px; place-items: center; color: #fff; background: var(--blue); border-radius: 50%; font-size: .74rem; font-weight: 900; }
.decision-card h3 { font-size: 1.18rem; }
.decision-card p { margin-bottom: 18px; color: var(--muted); }
.decision-card a, .decision-card > strong { display: inline-block; color: var(--blue); font-size: .85rem; font-weight: 900; }
.decision-card.repair { border-top-color: #6963b8; }
.decision-card.repair > span { background: #6963b8; }
.decision-card.repair > strong { color: #56509f; }
.decision-card.stop { border-top-color: #d44848; }
.decision-card.stop > span { background: #d44848; }
.decision-card.stop > strong { color: #aa3030; }
.decision-caution { margin: 20px 0 0; padding: 15px 18px; color: var(--muted); background: rgba(255,255,255,.7); border-left: 4px solid var(--navy); font-size: .88rem; }
.decision-contact { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-top: 18px; padding: 22px 24px; color: #fff; background: var(--navy-2); border-radius: var(--radius); }
.decision-contact strong { display: block; font-size: 1.05rem; }
.decision-contact p { margin: 5px 0 0; color: rgba(255,255,255,.78); font-size: .85rem; }
.decision-contact .line-link { flex: 0 0 auto; }
.decision-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.decision { padding: 24px; background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.17); border-radius: var(--radius); }
.decision b { display: block; margin-bottom: 7px; color: #bfe5ff; }
.expert { display: grid; grid-template-columns: 180px 1fr; gap: 32px; align-items: center; padding: 34px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.expert-photo { aspect-ratio: 1; overflow: hidden; background: var(--aqua-2); border: 1px solid #b8dcec; border-radius: 12px; }
.expert-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.expert p { margin: 8px 0 0; }
.expert .credential { color: var(--blue); font-weight: 800; }
.interview-quote { margin: 22px 0 0; padding: 20px 24px; background: var(--aqua); border-left: 4px solid var(--blue); border-radius: 0 4px 4px 0; color: var(--navy); }
.source-list { padding-left: 1.2em; }
.source-list li + li { margin-top: 10px; }
.evidence-grid { display: grid; grid-template-columns: 1.25fr .75fr .75fr; gap: 14px; margin-top: 30px; }
.evidence-photo { position: relative; min-height: 330px; overflow: hidden; background: #dceaf4; border-radius: var(--radius); }
.evidence-photo img { display: none; width: 100%; height: 100%; object-fit: cover; }
.evidence-photo img.ready { display: block; }
.evidence-photo span { position: absolute; left: 12px; bottom: 12px; z-index: 2; padding: 5px 9px; color: #fff; background: rgba(13,42,59,.76); border-radius: 999px; font-size: .72rem; font-weight: 800; }
.evidence-section { background: #fff; }
.evidence-note { max-width: 850px; margin: 17px 0 0; color: var(--muted); font-size: .8rem; }

.breadcrumb { padding: 18px 0; color: var(--muted); font-size: .82rem; }
.breadcrumb a { color: inherit; }
.page-hero { padding: 44px 0 56px; color: #fff; background: #0084d9; border-top: 1px solid #1597e4; border-bottom: 1px solid #0075c2; }
.page-hero h1, .page-hero .eyebrow { color: #fff; }
.page-hero h1 { max-width: 900px; font-size: clamp(2rem, 4vw, 3.5rem); }
.page-hero .lede { max-width: 760px; color: rgba(255,255,255,.84); font-size: 1.02rem; }
.article { padding: 60px 0 90px; background: #fff; }
.article h2 { margin-top: 54px; }
.article h3 { margin-top: 34px; }
.article p, .article li { max-width: 760px; }
.article .answer-box { max-width: 820px; margin: 0 0 38px; }
.article table { width: 100%; margin: 24px 0; border-collapse: collapse; }
.article th, .article td { padding: 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article th { color: var(--navy); background: var(--aqua); }
.article-decision { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 22px 0 34px; }
.article-decision section { padding: 22px; background: var(--aqua); border-top: 5px solid var(--blue); border-radius: var(--radius); }
.article-decision section.repair { background: #f5f3ff; border-top-color: #6963b8; }
.article-decision span { display: block; margin-bottom: 10px; color: var(--navy-2); font-weight: 900; }
.article-decision .repair span { color: #56509f; }
.article-decision ul { margin: 0; padding-left: 1.2em; }
.article-decision li + li { margin-top: 7px; }
.notice { margin: 28px 0; padding: 20px 24px; color: var(--warning); background: var(--warning-bg); border: 1px solid #efcaca; border-radius: 14px; }
.meta { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 20px; color: var(--muted); font-size: .84rem; }
.article-credibility { display: grid; grid-template-columns: .9fr 1.5fr .7fr; gap: 1px; max-width: 920px; margin-top: 24px; overflow: hidden; background: rgba(255,255,255,.38); border: 1px solid rgba(255,255,255,.48); border-radius: 14px; box-shadow: 0 10px 26px rgba(0,66,110,.12); }
.article-credibility span { padding: 13px 15px; color: rgba(255,255,255,.92); background: rgba(0,70,120,.20); font-size: .8rem; line-height: 1.55; }
.article-credibility b { display: block; margin-bottom: 2px; color: #fff; font-size: .68rem; letter-spacing: .08em; }
.article-toc { margin: 28px 0 42px; padding: 22px 24px; background: #eef8ff; border: 1px solid #b7def7; border-left: 5px solid var(--blue); border-radius: 14px; }
.article-toc-title { margin: 0 0 13px; color: var(--navy); font-weight: 900; }
.article-toc ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px 28px; margin: 0; padding-left: 1.4em; }
.article-toc li { color: var(--blue); font-weight: 800; }
.article-toc a { color: var(--navy-2); text-decoration-color: #6cbce9; text-underline-offset: 3px; }
.article-toc a:hover { color: var(--blue); }
.article h2[id] { scroll-margin-top: 100px; }
.article-faq-section { margin-top: 54px; }
.article-faq { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; }
.article-faq details { background: #fff; }
.article-faq details + details { border-top: 1px solid var(--line); }
.article-faq summary { position: relative; padding: 19px 52px 19px 52px; color: var(--navy); cursor: pointer; list-style: none; font-weight: 900; }
.article-faq summary::-webkit-details-marker { display: none; }
.article-faq summary::before { content: "Q"; position: absolute; top: 18px; left: 20px; color: var(--blue); font-weight: 900; }
.article-faq summary::after { content: "+"; position: absolute; top: 14px; right: 20px; color: var(--blue); font-size: 1.45rem; line-height: 1; }
.article-faq details[open] summary { background: #eef8ff; }
.article-faq details[open] summary::after { content: "−"; }
.article-faq details p { position: relative; margin: 0; padding: 17px 24px 20px 52px; color: var(--ink); background: #fff; }
.article-faq details p::before { content: "A"; position: absolute; top: 16px; left: 20px; color: #087847; font-weight: 900; }
.supervisor-note { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 3px 14px; margin-top: 34px; padding: 18px 20px; background: #f5fbff; border: 1px solid #cce8f8; border-radius: 12px; }
.supervisor-note span { grid-row: 1 / 3; padding: 6px 9px; color: #fff; background: var(--blue); border-radius: 7px; font-size: .72rem; font-weight: 900; }
.supervisor-note strong { color: var(--navy); font-size: .94rem; }
.supervisor-note p { margin: 0; color: var(--muted); font-size: .78rem; }
.article-consult { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; margin-top: 18px; padding: 25px 26px; color: #fff; background: linear-gradient(125deg, #006eaf, #008fdc); border-radius: 16px; box-shadow: 0 12px 30px rgba(0,82,133,.16); }
.article-consult-label { margin: 0 0 4px; color: #bceaff; font-size: .78rem; font-weight: 900; letter-spacing: .06em; }
.article-consult h3 { margin: 0; color: #fff; font-size: clamp(1.2rem, 2.5vw, 1.55rem); }
.article-consult div > p:last-child { margin: 8px 0 0; color: rgba(255,255,255,.84); font-size: .88rem; }
.article-consult-action { display: grid; justify-items: center; gap: 7px; min-width: 180px; }
.article-consult-action .line-link { width: 100%; min-height: 50px; }
.article-consult-action small { color: rgba(255,255,255,.76); font-size: .67rem; }
.related { margin-top: 62px; padding-top: 32px; border-top: 1px solid var(--line); }
.related-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.related-links a { padding: 15px 17px; color: var(--navy); background: var(--aqua); border-radius: 12px; text-decoration: none; font-weight: 700; }

.cta-band { padding: 58px 0; color: #fff; background: linear-gradient(120deg, var(--navy-2), #007fc0); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.cta-band h2 { margin: 0; color: #fff; font-size: clamp(1.45rem, 2.8vw, 2.2rem); }
.cta-band p { margin: 8px 0 0; color: rgba(255,255,255,.75); }
.consult-note { margin-top: 10px; font-size: .86em; color: var(--muted); }
.cta-band .consult-note, .service-bridge-copy .consult-note { color: rgba(255,255,255,.78); }
.site-footer { padding: 42px 0 28px; color: #dcebf7; background: #00436f; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 40px; }
.site-footer h2, .site-footer h3 { color: #fff; font-family: var(--sans); font-size: 1rem; }
.site-footer p, .site-footer li { color: #c3d8e8; font-size: .86rem; }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li + li { margin-top: 7px; }
.site-footer a { color: #e8f5ff; }
.copyright { margin-top: 34px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: #9fbdd3; font-size: .75rem; }

@media (max-width: 860px) {
  .global-nav { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 22px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .global-nav.open { display: grid; }
  .nav-button { display: block; }
  .hero-grid, .expert, .service-bridge-inner { grid-template-columns: 1fr; }
  .evidence-grid { grid-template-columns: 1fr 1fr; }
  .evidence-photo:first-child { grid-column: 1 / -1; }
  .hero { padding-top: 54px; background: #0084d9; }
  .cards, .decision-grid, .decision-guide, .guide-cards, .guide-cards.two { grid-template-columns: 1fr; }
  .article-decision { grid-template-columns: 1fr; }
  .expert-photo { width: 150px; }
  .cta-inner { align-items: flex-start; flex-direction: column; }
  .decision-contact { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .wrap, .narrow { width: min(100% - 28px, 1120px); }
  .section { padding: 60px 0; }
  .hero { padding: 42px 0 50px; }
  .quick-check, .card, .answer-box { padding: 22px; }
  .related-links { grid-template-columns: 1fr; }
  .evidence-grid { grid-template-columns: 1fr; }
  .evidence-photo:first-child { grid-column: auto; }
  .evidence-photo { min-height: 280px; }
  .brand { font-size: .9rem; }
  .hero-trust { grid-template-columns: 1fr; }
  .hero-trust span { min-height: 0; }
  .article-credibility { grid-template-columns: 1fr; }
  .article-toc { padding: 20px; }
  .article-toc ol { grid-template-columns: 1fr; }
  .supervisor-note { grid-template-columns: 1fr; }
  .supervisor-note span { grid-row: auto; justify-self: start; }
  .article-consult { grid-template-columns: 1fr; padding: 23px 21px; }
  .article-consult-action { justify-items: stretch; }
  .article-consult-action small { text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}