:root {
  --ink: #173d50;
  --muted: #516f7c;
  --blue: #0866a9;
  --teal: #187982;
  --line: #c7dfe8;
  --paper: #f6fafb;
  --gold: #b6a474;
  --font: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  --latin: Arial, Helvetica, sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 106px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 15px; line-height: 1.85; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
img { max-width: 100%; height: auto; }
button, summary, a { -webkit-tap-highlight-color: transparent; }
button, a, summary, input { touch-action: manipulation; }
a:focus-visible, summary:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #257aaf; outline-offset: 5px; }
summary:focus-visible { outline-offset: -5px; }
h1, h2, h3, p { margin: 0; }
svg { display: block; }
.section-shell { width: min(1160px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; top: 10px; left: 12px; z-index: 20; padding: 10px 16px; background: white; border: 1px solid var(--blue); border-radius: 6px; transform: translateY(-160%); }
.skip-link:focus { transform: none; }
.site-header { width: 100%; min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px max(48px, calc((100% - 1280px) / 2)); border-bottom: 1px solid #d1e1e980; background: #f7fbfbe8; backdrop-filter: blur(14px); position: sticky; top: 0; z-index: 10; }
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand img { width: 32px; height: 32px; border-radius: 7px; }
.brand > span { font-family: var(--latin); font-size: 14px; line-height: 1.4; letter-spacing: .18em; }
.brand small { display: block; color: var(--muted); font-size: 9px; letter-spacing: .17em; margin-top: 3px; }
.header-nav { display: flex; align-items: center; gap: 28px; font-size: 12px; }
.header-nav a { display: flex; align-items: center; gap: 16px; min-height: 44px; }
.header-nav span { font-family: var(--latin); font-size: 18px; color: var(--blue); }
.header-nav a:hover { color: var(--blue); }
.eyebrow { font-size: 11px; letter-spacing: .13em; font-weight: 500; display: flex; align-items: center; gap: 10px; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); display: inline-block; flex-shrink: 0; box-shadow: 0 0 0 4px #82b6c51c; }
.hero { position: relative; padding-top: 70px; padding-bottom: 34px; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.hero::before { content: ""; position: absolute; width: 610px; height: 650px; max-width: 65vw; right: 0; top: 26px; background: radial-gradient(ellipse, #d0e9f299 0%, #e8f4f480 43%, transparent 72%); z-index: -1; }
.hero-brand { display: block; font-family: var(--latin); font-size: 21px; line-height: 1.3; font-weight: 400; letter-spacing: .27em; margin: 28px 0 16px; }
.hero-lab { position: relative; display: inline-block; font-family: var(--latin); font-size: clamp(68px, 6.7vw, 96px); line-height: .99; font-weight: 400; letter-spacing: -.052em; }
.title-spark { display: inline-block; font-size: .65em; font-weight: 300; vertical-align: 12%; color: #267e9a; margin-left: 13px; }
.hero-catch { font-size: clamp(24px, 2.3vw, 31px); font-weight: 500; line-height: 1.7; letter-spacing: .04em; margin: 26px 0 22px; }
.hero-catch span { white-space: nowrap; }
.hero-intro { display: flex; gap: 20px; flex-wrap: wrap; color: var(--muted); font-size: 13px; line-height: 1.95; }
.hero-intro p:last-child { width: 100%; }
.text-link { display: inline-flex; align-items: center; gap: 28px; border-bottom: 1px solid #8fbacb; font-size: 13px; min-height: 46px; margin-top: 24px; }
.text-link span { color: var(--blue); font-size: 20px; }
.text-link:hover { color: var(--blue); }
.hero-discovery { display: flex; flex-direction: column; align-items: center; justify-content: center; padding-top: 24px; min-width: 0; }
.specimen { position: relative; width: 100%; aspect-ratio: 1 / 1.02; max-width: 550px; }
.specimen-art { width: 100%; height: auto; }
.specimen-caption { position: absolute; top: 0; right: 6%; font-family: var(--latin); font-size: 9px; letter-spacing: .24em; color: #64818b; }
.specimen-index { position: absolute; bottom: 4%; left: 5%; font-family: var(--latin); font-size: 10px; letter-spacing: .2em; color: var(--muted); }
.specimen-note { position: absolute; left: 8%; top: 64%; font-size: 12px; letter-spacing: .04em; color: #476f7d; }
.specimen-seal { position: absolute; width: 78px; height: 78px; border: 1px solid #adc7c5; border-radius: 50%; right: 1%; top: 53%; display: flex; flex-direction: column; align-items: center; justify-content: center; font-family: var(--latin); font-size: 33px; line-height: 1.1; color: #709195; background: #f7fbfc80; }
.specimen-seal span { display: block; font-size: 8px; letter-spacing: .14em; margin-top: 4px; }
.art-bubble { animation: drift 8s ease-in-out infinite alternate; }
.bubble-two { animation-delay: -4s; }
@keyframes drift { from { transform: translateY(0); } to { transform: translateY(-9px); } }
.guide { display: flex; align-items: center; gap: 16px; max-width: 100%; }
.guide-ren { align-self: flex-end; margin-top: 10px; margin-right: 32px; }
.portrait { display: block; position: relative; width: 72px; height: 72px; border-radius: 50%; overflow: hidden; border: 1px solid #c7dce3; flex-shrink: 0; background: #e7f0f3; }
.portrait img { position: absolute; max-width: none; height: auto; }
.ren-portrait img { width: 225%; left: -62.5%; top: -5%; }
.rei-portrait img { width: 500%; left: -117%; top: -10%; }
.guide-bubble { position: relative; padding: 15px 22px; background: #fff9; border: 1px solid #cbdfe9; border-radius: 20px 20px 20px 5px; box-shadow: 0 6px 20px #365e7810; }
.guide-name { font-family: var(--latin); font-size: 8px; letter-spacing: .16em; color: #567c91; display: block; margin-bottom: 4px; }
.guide-bubble p { font-size: 13px; font-weight: 500; line-height: 1.75; }
.hero-bottom { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); margin-top: 26px; padding-top: 18px; font-family: var(--latin); font-size: 8px; letter-spacing: .18em; color: var(--muted); }
.hero-bottom > span:last-child > span { margin-left: 12px; }
.lab-map { padding-top: 70px; padding-bottom: 68px; }
.map-heading { margin-bottom: 28px; }
.map-heading .eyebrow { color: var(--blue); font-family: var(--latin); }
.map-heading h2 { font-size: 27px; font-weight: 500; letter-spacing: .05em; margin: 10px 0 7px; }
.map-heading > p:last-child { font-size: 13px; color: var(--muted); }
.zone-doors { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.zone-door { position: relative; display: flex; flex-direction: column; padding: 22px 26px; border-radius: 20px; border: 1px solid #c4dce8; box-shadow: 0 7px 25px #5884a30b; transition: transform .2s, box-shadow .2s; min-height: 245px; overflow: hidden; }
.zone-door:hover { transform: translateY(-4px); box-shadow: 0 10px 26px #5884a317; }
.door-blue { background: linear-gradient(125deg, #e8f2fa, #f8fcffcc); }
.door-teal { background: linear-gradient(125deg, #e4f1f1, #f8fdfbcc); }
.door-silver { background: linear-gradient(125deg, #eaf0f3, #fffdf6b3); }
.door-top { display: flex; justify-content: space-between; gap: 14px; font-family: var(--latin); font-size: 11px; letter-spacing: .12em; }
.door-top > span { color: var(--muted); font-size: 8px; }
.door-icon { display: block; width: 49px; height: 49px; margin: 20px 0 16px; }
.door-icon svg { width: 100%; height: 100%; stroke: #6e9fb3; stroke-width: 1; }
.door-teal .door-icon svg { stroke: #6e9e9a; }
.door-silver .door-icon svg { stroke: #999f98; }
.door-title { display: block; font-size: 18px; font-weight: 500; margin-bottom: 10px; letter-spacing: .01em; }
.door-bottom { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: 11px; color: var(--muted); margin-top: auto; }
.door-bottom > span { font-size: 23px; line-height: 1; }
.faq-zone { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 60px; padding-top: 50px; padding-bottom: 50px; align-items: start; }
.zone-intro { min-width: 0; position: relative; }
.zone-label { display: flex; align-items: center; gap: 10px; font-family: var(--latin); font-size: 10px; letter-spacing: .18em; margin-bottom: 10px; color: #587d8f; }
.zone-label > span { font-size: 38px; line-height: 1.2; letter-spacing: -.04em; font-weight: 300; color: var(--blue); }
.zone-intro h2 { font-size: 28px; line-height: 1.7; font-weight: 500; letter-spacing: .04em; }
.zone-description { margin-top: 15px; font-size: 13px; color: var(--muted); line-height: 1.95; }
.zone-range { display: inline-block; margin-top: 26px; font-family: var(--latin); color: #7899a6; font-size: 9px; letter-spacing: .16em; }
.zone-watermark { font-family: var(--latin); color: #92bdce55; font-size: 105px; letter-spacing: -.07em; line-height: 1; margin-top: 26px; }
.zone-watermark sub { font-size: .46em; }
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-card { background: #ffffffa8; border: 1px solid #c9dee9; border-radius: 18px; box-shadow: 0 6px 22px #507b9710, inset 0 1px 0 #fff; backdrop-filter: blur(8px); min-width: 0; overflow: clip; }
.faq-card summary { display: flex; align-items: center; gap: 18px; padding: 23px 24px; cursor: pointer; list-style: none; min-height: 102px; transition: background .16s; }
summary::-webkit-details-marker { display: none; }
summary::marker { content: ""; }
.faq-card summary:hover { background: #e7f2f955; }
.lab-number { font-family: var(--latin); color: #54819b; font-size: 10px; letter-spacing: .06em; white-space: nowrap; flex-shrink: 0; }
.question-wrap { display: block; flex: 1; min-width: 0; }
.question-topic { display: block; color: #57788a; font-size: 10px; font-weight: 400; margin-bottom: 6px; line-height: 1.6; }
.question { font-size: 16px; font-weight: 500; line-height: 1.8; overflow-wrap: anywhere; }
.faq-plus { width: 29px; height: 29px; border: 1px solid #c5dae4; border-radius: 50%; flex-shrink: 0; position: relative; background: #f4f9fb80; transition: transform .18s; }
.faq-plus::before, .faq-plus::after { content: ""; position: absolute; width: 11px; height: 1px; background: #528da6; left: 8px; top: 13px; }
.faq-plus::after { transform: rotate(90deg); }
details[open] > summary .faq-plus { transform: rotate(45deg); }
.faq-card[open] { border-color: #a4c7da; background: #fffdfde6; }
.faq-card[open] .lab-number { color: var(--blue); }
.faq-answer { padding: 20px 24px 26px; margin: 0 24px; border-top: 1px solid #dbe8ee; font-size: 14px; line-height: 1.95; color: #375969; }
.faq-answer p + p { margin-top: 14px; }
.faq-answer ul { padding-left: 1.25em; margin: 14px 0; }
.faq-card[open] .faq-answer { animation: answer-in .22s ease-out; }
@keyframes answer-in { from { opacity: .4; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
.answer-highlight { color: var(--blue); font-weight: 600; padding-left: 12px; border-left: 2px solid #9fc2d6; }
.interlude { padding: 66px 24px; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 18px; text-align: center; }
.interlude p { font-size: 27px; line-height: 1.8; letter-spacing: .1em; font-weight: 400; }
.interlude-star { color: #8eb2bc; font-family: var(--latin); font-size: 31px; line-height: 1; }
.interlude-line { display: block; width: 1px; height: 24px; background: #bad0d8; }
.interlude-label { font-family: var(--latin); font-size: 8px; letter-spacing: .19em; color: #668491; }
.zone-two-wrap { padding: 24px 0; background: #e9f3f2; position: relative; border-top: 1px solid #deebe8; border-bottom: 1px solid #d9e7e7; }
.zone-two-wrap::before { content: ""; position: absolute; width: 175px; height: 175px; border-radius: 50%; border: 1px solid #c2d9d960; top: -35px; right: 8%; pointer-events: none; }
.zone-two .zone-label > span { color: var(--teal); }
.zone-drawing { width: 180px; max-width: 100%; margin-top: 35px; stroke: #94b5ba; stroke-width: 1; }
.faq-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 16px; }
.faq-grid .faq-card summary { position: relative; flex-wrap: wrap; align-content: start; align-items: start; padding: 24px; gap: 10px; min-height: 175px; }
.faq-grid .lab-number { flex-basis: 100%; padding-right: 40px; margin-bottom: 6px; }
.faq-grid .question-wrap { flex-basis: calc(100% - 40px); }
.faq-grid .faq-plus { position: absolute; right: 21px; top: 22px; }
.faq-grid .faq-answer { margin-inline: 20px; padding-inline: 3px; }
.interlude-orbit { gap: 20px; padding-top: 66px; padding-bottom: 66px; }
.interlude-orbit svg { width: 114px; height: 70px; stroke: #9bb8c4; stroke-width: .9; }
.zone-three { padding-top: 24px; padding-bottom: 92px; }
.zone-three-heading { display: flex; align-items: center; justify-content: space-between; gap: 36px; margin-bottom: 35px; }
.zone-three .zone-intro h2 { font-size: 30px; }
.zone-three .zone-description { margin-top: 8px; }
.guide-rei .portrait { width: 80px; height: 80px; }
.zone-three .faq-grid { gap: 18px; }
.zone-three .faq-card summary { min-height: 143px; }
.faq-card-wide { grid-column: 1 / -1; }
.zone-three .faq-card-wide summary { flex-wrap: nowrap; min-height: 102px; align-items: center; }
.zone-three .faq-card-wide .lab-number { flex-basis: auto; margin: 0; padding-right: 18px; }
.zone-three .faq-card-wide .faq-plus { position: relative; right: auto; top: auto; }
.zone-three .faq-card-wide .question-wrap { flex-basis: auto; }
.launch { position: relative; background: #173e53; color: #f3f8fb; overflow: hidden; border-radius: 38px 38px 0 0; }
.launch-orbit { position: absolute; width: 690px; height: 690px; border: 1px solid #aac9d217; border-radius: 50%; top: -198px; left: -130px; }
.launch-orbit::before, .launch-orbit::after { content: ""; position: absolute; inset: 44px; border: 1px solid #aac9d21a; border-radius: 50%; }
.launch-orbit::after { inset: 100px; border-style: dashed; }
.launch-inner { position: relative; padding-top: 85px; padding-bottom: 85px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 54px; }
.launch .eyebrow { font-family: var(--latin); color: #a8c4ce; margin-bottom: 24px; }
.launch .status-dot { background: #9ecbd0; box-shadow: 0 0 0 4px #9ecbd017; }
.launch h2 { font-family: var(--latin); font-size: 31px; font-weight: 400; line-height: 1.05; letter-spacing: .09em; }
.launch h2 > span { display: block; font-size: 112px; line-height: 1.15; font-weight: 300; letter-spacing: -.055em; }
.launch-brand { font-family: var(--latin); font-size: 16px; letter-spacing: .28em; margin-top: 12px; }
.launch-date { font-size: 18px; font-weight: 500; letter-spacing: .06em; margin-top: 7px; }
.launch-copy { color: #c4d7de; font-size: 14px; margin-top: 25px; line-height: 2; }
.launch-copy p + p { margin-top: 14px; }
.participation-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; align-self: center; }
.participation-card { border: 1px solid #9bbbc142; border-radius: 22px; padding: 28px 23px; background: #edf8fa09; min-height: 298px; display: flex; flex-direction: column; }
.participation-code { display: block; font-family: var(--latin); font-size: 9px; letter-spacing: .13em; color: #a0bdc8; margin-bottom: 25px; }
.participation-card h3 { font-size: 22px; font-weight: 400; line-height: 1.65; margin-bottom: 17px; letter-spacing: .03em; }
.participation-card p { color: #c6d8df; font-size: 12px; line-height: 1.9; margin-bottom: 24px; }
.participation-status { display: block; color: #c0d5d5; font-size: 10px; margin-top: auto; padding-top: 16px; border-top: 1px solid #a0bfcc33; }
.interlude-future { background: #ebf3f6; padding-top: 64px; padding-bottom: 64px; }
.interlude-future p { font-size: 25px; }
.final-cta { padding-top: 80px; padding-bottom: 80px; }
.cta-heading { text-align: center; }
.cta-heading .eyebrow { justify-content: center; font-family: var(--latin); font-size: 10px; color: var(--blue); }
.cta-heading h2 { font-size: 32px; font-weight: 500; letter-spacing: .05em; margin: 13px 0 23px; }
.cta-heading > p:not(.eyebrow) { color: var(--muted); font-size: 14px; line-height: 2; margin-top: 12px; }
.cta-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; width: min(940px, 100%); margin: 36px auto 0; }
.cta-option { min-width: 0; }
.cta-option-code { display: block; text-align: center; font-family: var(--latin); font-size: 9px; letter-spacing: .16em; color: #618390; margin-bottom: 12px; }
.cta-button { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 21px 25px; min-height: 78px; border-radius: 16px; font-size: 16px; font-weight: 500; line-height: 1.65; transition: box-shadow .2s, transform .2s; }
.cta-arrow { flex-shrink: 0; font-family: var(--latin); font-size: 23px; }
.cta-text { min-width: 0; }
.cta-text > span { white-space: nowrap; }
.cta-button:hover { transform: translateY(-2px); box-shadow: 0 8px 25px #47768d22; }
.cta-primary { background: #0d6597; color: #fff; border: 1px solid #0d6597; box-shadow: 0 4px 13px #3b769323; }
.cta-secondary { background: #e6f3f1; border: 1px solid #b1d2d0; color: #245f63; }
.cta-option > p { text-align: center; color: var(--muted); font-size: 11px; line-height: 1.9; margin-top: 12px; }
.registration-status { display: flex; align-items: baseline; justify-content: center; gap: 10px; font-size: 11px; color: #5f7d89; text-align: center; margin-top: 24px; }
.registration-status .status-dot { width: 5px; height: 5px; }
.guide-cta { width: fit-content; margin: 34px auto 0; }
.guide-cta .portrait { width: 62px; height: 62px; }
.guide-cta .guide-bubble { box-shadow: none; }
.registration-card { width: min(760px, 100%); margin: 42px auto 0; border: 1px solid #c8dde7; border-radius: 20px; background: #fff9; scroll-margin-top: 14px; overflow: clip; }
.registration-card > summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer; list-style: none; padding: 22px 26px; min-height: 86px; }
.registration-card > summary > span:first-child { display: flex; align-items: center; gap: 14px; }
.registration-tag { font-family: var(--latin); font-size: 9px; letter-spacing: .12em; color: #5b8294; }
.registration-title { font-size: 14px; font-weight: 500; }
.registration-content { padding: 0 28px 28px; }
.registration-intro { border-top: 1px solid #d9e7ed; padding-top: 22px; margin-bottom: 24px; font-size: 13px; color: var(--muted); }
.form-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field-label { min-width: 0; font-size: 12px; font-weight: 500; }
.field-wide { grid-column: 1 / -1; }
.field-label input { display: block; width: 100%; min-width: 0; border: 1px solid #bfd5df; background: #fcfefe; border-radius: 9px; padding: 12px; margin-top: 8px; color: var(--ink); font-size: 16px; line-height: 1.5; }
.field-label input::placeholder { color: #78909b; font-size: 12px; }
.interest-options { border: 0; padding: 0; margin: 25px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.interest-options legend { font-size: 12px; font-weight: 500; padding: 0; margin-bottom: 12px; }
.interest-options legend > span { font-size: 10px; font-weight: 400; color: var(--muted); margin-left: 12px; }
.interest-options label { display: flex; align-items: center; gap: 9px; min-height: 44px; font-size: 12px; cursor: pointer; background: #eef5f6; border: 1px solid #d0e1e5; padding: 9px 12px; border-radius: 8px; }
.interest-options input { width: 16px; height: 16px; accent-color: var(--teal); margin: 0; flex-shrink: 0; }
.student-note { margin-top: 17px; color: #5e7b88; font-size: 11px; line-height: 1.8; }
.form-submit { display: block; width: 100%; margin-top: 22px; padding: 13px; min-height: 50px; border: 1px solid #c5d7e0; border-radius: 10px; color: #5d7c8a; background: #e7f0f4; cursor: not-allowed; font-size: 13px; }
.form-note { color: #63818e; font-size: 11px; line-height: 1.9; margin-top: 12px; }
.registration-content > form > .form-note { text-align: center; }
.site-footer { border-top: 1px solid #d4e4eb; display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-top: 27px; padding-bottom: 27px; }
.footer-brand { font-family: var(--latin); font-size: 15px; letter-spacing: .24em; }
.site-footer p { font-size: 10px; color: var(--muted); margin-top: 5px; }
.site-footer a { display: flex; gap: 20px; align-items: center; font-size: 11px; min-height: 44px; }
.site-footer a > span { color: var(--blue); font-size: 18px; }
.site-footer small { font-family: var(--latin); font-size: 8px; letter-spacing: .07em; color: #63818e; }
.mobile-break { display: none; }
@media (max-width: 1120px) {
  .section-shell { width: calc(100% - 64px); }
  .site-header { padding-inline: 32px; }
  .hero { gap: 26px; }
  .hero-intro { display: block; }
  .hero-intro p + p { margin-top: 12px; }
  .hero-discovery { justify-content: center; }
  .guide-ren { margin-right: 0; }
  .zone-door { padding: 22px; }
  .door-title { font-size: 16px; }
  .faq-zone { grid-template-columns: 225px minmax(0, 1fr); gap: 35px; }
  .faq-grid .faq-card summary { padding: 22px 20px; }
  .question { font-size: 15px; }
  .launch-inner { gap: 28px; grid-template-columns: minmax(0, .82fr) minmax(0, 1fr); }
  .participation-cards { gap: 12px; }
  .participation-card { padding: 25px 18px; }
  .participation-card h3 { font-size: 19px; }
  .launch h2 > span { font-size: 98px; }
  .cta-button { font-size: 14px; padding-inline: 22px; }
}
@media (max-width: 860px) {
  .hero { padding-top: 50px; }
  .hero-lab { font-size: 65px; }
  .hero .eyebrow { font-size: 10px; letter-spacing: .05em; }
  .hero-catch { font-size: 23px; letter-spacing: 0; }
  .specimen-seal { width: 60px; height: 60px; font-size: 26px; }
  .specimen-note { font-size: 10px; }
  .specimen-index { font-size: 8px; letter-spacing: .12em; }
  .guide-ren { flex-direction: column; gap: 10px; align-items: flex-end; }
  .guide-ren .portrait { width: 62px; height: 62px; }
  .guide-bubble { padding: 12px 16px; }
  .zone-doors { gap: 12px; }
  .zone-door { padding: 19px 17px; }
  .door-top { font-size: 10px; flex-wrap: wrap; gap: 1px; }
  .door-top > span { flex-basis: 100%; }
  .door-title { font-size: 15px; }
  .door-bottom { font-size: 10px; }
  .faq-zone { display: block; }
  .zone-intro { margin-bottom: 25px; }
  .zone-intro h2 { font-size: 27px; }
  .zone-range { margin-top: 16px; }
  .zone-watermark, .zone-drawing, .desktop-break { display: none; }
  .zone-three-heading { align-items: center; }
  .zone-three-heading .zone-intro { margin-bottom: 0; }
  .zone-three .zone-intro h2 { font-size: 25px; }
  .zone-three-heading .guide { gap: 10px; }
  .guide-rei .portrait { width: 62px; height: 62px; }
  .guide-rei .guide-bubble p { font-size: 11px; }
  .launch-inner { display: block; padding-top: 65px; padding-bottom: 65px; }
  .launch-intro { text-align: center; }
  .launch .eyebrow { justify-content: center; }
  .launch h2 > span { display: inline-block; margin-left: 10px; font-size: 82px; vertical-align: baseline; }
  .launch h2 { font-size: 29px; letter-spacing: .05em; }
  .participation-cards { max-width: 620px; margin: 35px auto 0; gap: 20px; }
  .participation-card { min-height: 266px; padding: 25px; }
  .participation-card h3 { font-size: 23px; }
  .participation-card h3 br { display: none; }
  .cta-options { gap: 16px; }
  .cta-button { min-height: 92px; }
}
@media (max-width: 620px) {
  html { scroll-padding-top: 94px; }
  .section-shell { width: calc(100% - 40px); }
  .site-header { min-height: 72px; padding: 12px 20px; gap: 10px; }
  .brand { gap: 8px; }
  .brand img { width: 28px; height: 28px; }
  .brand > span { font-size: 11px; letter-spacing: .12em; }
  .brand small { font-size: 8px; letter-spacing: .1em; }
  .header-nav { gap: 0; font-size: 10px; }
  .header-nav a { gap: 7px; }
  .header-nav a:first-child { display: none; }
  .header-nav span { font-size: 15px; }
  .hero { grid-template-columns: 1fr; padding-top: 37px; gap: 20px; padding-bottom: 20px; }
  .hero::before { width: 100%; max-width: none; right: 0; height: 570px; top: 470px; }
  .hero-brand { margin-top: 23px; font-size: 16px; letter-spacing: .22em; }
  .hero-lab { font-size: clamp(61px, 15.5vw, 87px); }
  .hero-catch { font-size: 26px; line-height: 1.7; margin-top: 25px; margin-bottom: 22px; letter-spacing: .01em; }
  .hero-intro { font-size: 13px; line-height: 1.9; }
  .hero-intro p + p { margin-top: 12px; }
  .text-link { margin-top: 19px; }
  .hero-discovery { padding-top: 0; }
  .specimen { width: min(360px, 100%); aspect-ratio: 1 / 1; }
  .specimen-caption { top: 0; font-size: 8px; }
  .specimen-note { font-size: 11px; top: 65%; }
  .specimen-index { font-size: 8px; bottom: 4%; }
  .specimen-seal { width: 60px; height: 60px; }
  .guide-ren { flex-direction: row; align-items: center; align-self: center; margin: 9px 0 0; }
  .guide-ren .portrait { width: 61px; height: 61px; }
  .guide-bubble p { font-size: 12px; }
  .hero-bottom { margin-top: 17px; gap: 12px; font-size: 7px; letter-spacing: .08em; align-items: start; }
  .hero-bottom > span:first-child { max-width: 54%; }
  .hero-bottom > span:last-child { text-align: right; }
  .hero-bottom > span:last-child > span { margin-left: 4px; }
  .lab-map { padding-top: 43px; padding-bottom: 25px; }
  .map-heading .eyebrow { font-size: 10px; }
  .map-heading h2 { font-size: 23px; line-height: 1.7; }
  .map-heading > p:last-child { font-size: 11px; }
  .mobile-break { display: block; }
  .zone-doors { grid-template-columns: 1fr; gap: 12px; }
  .zone-door { min-height: 132px; padding: 17px 20px 17px 80px; border-radius: 17px; }
  .door-top { flex-wrap: nowrap; gap: 7px; font-size: 9px; }
  .door-top > span { flex-basis: auto; font-size: 7px; }
  .door-icon { width: 39px; height: 39px; margin: 0; position: absolute; left: 22px; top: 47px; }
  .door-title { font-size: 16px; margin-top: 10px; margin-bottom: 6px; }
  .door-bottom { font-size: 10px; }
  .door-bottom > span { font-size: 20px; }
  .faq-zone { padding-top: 45px; padding-bottom: 30px; }
  .zone-label { margin-bottom: 9px; }
  .zone-label > span { font-size: 34px; }
  .zone-intro h2 { font-size: 26px; line-height: 1.65; }
  .zone-description { font-size: 12px; margin-top: 12px; }
  .zone-range { margin-top: 12px; font-size: 8px; }
  .faq-list { gap: 12px; }
  .faq-card { border-radius: 15px; }
  .faq-card summary { padding: 20px 18px; flex-wrap: wrap; gap: 7px; align-content: start; align-items: start; position: relative; }
  .lab-number { flex-basis: 100%; font-size: 9px; margin-bottom: 5px; padding-right: 35px; }
  .question-wrap { flex-basis: 100%; }
  .question-topic { font-size: 9px; margin-bottom: 5px; }
  .question { font-size: 15px; line-height: 1.85; }
  .faq-plus { width: 28px; height: 28px; }
  .faq-card summary > .faq-plus { position: absolute; right: 18px; top: 19px; }
  .faq-answer { margin: 0 18px; padding: 17px 1px 22px; font-size: 14px; line-height: 2; }
  .faq-answer p + p { margin-top: 12px; }
  .interlude { padding-top: 46px; padding-bottom: 46px; gap: 16px; }
  .interlude p { font-size: 22px; letter-spacing: .07em; }
  .interlude-label { font-size: 7px; letter-spacing: .14em; }
  .interlude-star { font-size: 25px; }
  .zone-two-wrap { padding: 0 0 14px; }
  .zone-two-wrap::before { width: 125px; height: 125px; top: 27px; right: 10%; }
  .faq-grid { grid-template-columns: 1fr; gap: 12px; }
  .faq-grid .faq-card summary { min-height: 125px; padding: 20px 18px; gap: 7px; }
  .faq-grid .faq-answer { margin-inline: 18px; padding-inline: 1px; }
  .faq-grid .lab-number { margin-bottom: 5px; padding-right: 35px; }
  .faq-grid .question-wrap { flex-basis: 100%; }
  .faq-grid .faq-plus { right: 18px; top: 19px; }
  .interlude-orbit { padding-bottom: 38px; }
  .interlude-orbit svg { width: 93px; height: 60px; }
  .zone-three { padding-top: 26px; padding-bottom: 53px; }
  .zone-three-heading { display: block; margin-bottom: 26px; }
  .zone-three .zone-intro h2 { font-size: 25px; }
  .zone-three .zone-description { font-size: 11px; }
  .zone-three-heading .guide { margin-top: 23px; }
  .guide-rei .portrait { width: 64px; height: 64px; }
  .guide-rei .guide-bubble p { font-size: 12px; }
  .zone-three .faq-grid { gap: 12px; }
  .zone-three .faq-card summary { min-height: 124px; }
  .faq-card-wide { grid-column: auto; }
  .zone-three .faq-card-wide summary { flex-wrap: wrap; min-height: 136px; align-items: start; }
  .zone-three .faq-card-wide .lab-number { flex-basis: 100%; margin-bottom: 5px; padding-right: 35px; }
  .zone-three .faq-card-wide .question-wrap { flex-basis: 100%; }
  .zone-three .faq-card-wide .faq-plus { position: absolute; right: 18px; top: 19px; }
  .launch { border-radius: 25px 25px 0 0; }
  .launch-inner { padding-top: 50px; padding-bottom: 44px; }
  .launch .eyebrow { font-size: 9px; margin-bottom: 19px; }
  .launch h2 { font-size: 22px; letter-spacing: .08em; }
  .launch h2 > span { display: block; font-size: 96px; margin: 0; }
  .launch-brand { font-size: 16px; margin-top: 12px; }
  .launch-date { font-size: 17px; letter-spacing: .03em; }
  .launch-copy { font-size: 13px; margin-top: 23px; }
  .participation-cards { grid-template-columns: 1fr; gap: 14px; margin-top: 29px; }
  .participation-card { padding: 23px; min-height: 220px; border-radius: 18px; }
  .participation-code { margin-bottom: 13px; font-size: 8px; }
  .participation-card h3 { font-size: 21px; margin-bottom: 10px; }
  .participation-card h3 br { display: none; }
  .participation-card p { font-size: 12px; margin-bottom: 17px; }
  .participation-status { font-size: 10px; padding-top: 12px; }
  .interlude-future { padding-top: 43px; padding-bottom: 43px; }
  .interlude-future p { font-size: 21px; }
  .final-cta { padding-top: 48px; padding-bottom: 47px; }
  .cta-heading .eyebrow { font-size: 8px; letter-spacing: .12em; }
  .cta-heading h2 { font-size: 26px; margin-top: 12px; margin-bottom: 19px; }
  .cta-heading > p:not(.eyebrow) { font-size: 12px; margin-top: 12px; }
  .cta-options { grid-template-columns: 1fr; gap: 25px; margin-top: 29px; }
  .cta-option-code { font-size: 8px; margin-bottom: 9px; }
  .cta-button { font-size: 15px; min-height: 72px; border-radius: 13px; padding: 18px 20px; gap: 12px; }
  .cta-arrow { font-size: 21px; }
  .cta-option > p { font-size: 10px; margin-top: 10px; }
  .registration-status { font-size: 10px; line-height: 1.85; align-items: start; margin-top: 21px; }
  .registration-status .status-dot { margin-top: 7px; }
  .guide-cta { gap: 11px; margin-top: 27px; }
  .guide-cta .portrait { width: 51px; height: 51px; }
  .guide-cta .guide-bubble { padding: 12px 14px; }
  .guide-cta .guide-bubble p { font-size: 11px; }
  .registration-card { margin-top: 29px; border-radius: 16px; }
  .registration-card > summary { padding: 20px; gap: 8px; min-height: 86px; }
  .registration-card > summary > span:first-child { display: block; }
  .registration-tag { display: block; margin-bottom: 5px; font-size: 8px; }
  .registration-title { font-size: 13px; }
  .registration-content { padding: 0 20px 22px; }
  .registration-intro { font-size: 12px; line-height: 1.9; padding-top: 18px; margin-bottom: 19px; }
  .form-fields { grid-template-columns: 1fr; gap: 15px; }
  .field-wide { grid-column: auto; }
  .interest-options { grid-template-columns: 1fr; gap: 8px; margin-top: 22px; }
  .student-note { font-size: 10px; }
  .form-note { font-size: 10px; }
  .site-footer { flex-wrap: wrap; justify-content: space-between; gap: 14px; padding-top: 24px; padding-bottom: 22px; }
  .footer-brand { font-size: 13px; }
  .site-footer p { font-size: 9px; }
  .site-footer a { font-size: 10px; gap: 10px; }
  .site-footer small { width: 100%; font-size: 8px; }
}
@media (max-width: 360px) {
  .section-shell { width: calc(100% - 32px); }
  .site-header { padding-inline: 16px; }
  .hero .eyebrow { font-size: 9px; letter-spacing: .03em; gap: 8px; }
  .hero-lab { font-size: 60px; }
  .hero-catch { font-size: 23px; }
  .door-title { font-size: 14px; }
  .zone-door { padding-left: 71px; padding-right: 16px; }
  .door-icon { left: 18px; width: 34px; height: 34px; }
  .door-top { font-size: 8px; }
  .door-top > span { font-size: 7px; }
  .zone-three .zone-intro h2 { font-size: 22px; }
  .cta-button { font-size: 14px; padding-inline: 17px; }
  .guide-cta .guide-bubble p { font-size: 10px; }
  .guide-cta .portrait { width: 45px; height: 45px; }
  .participation-card h3 { font-size: 20px; }
  .interlude-future p { font-size: 19px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* FAQ登録フォームの送信状態 */
.field-required { margin-left: 10px; color: #5e7b88; font-size: 10px; font-weight: 400; }
.form-honeypot { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.registration-card .form-submit:not(:disabled) { color: #fff; background: #0d6597; border-color: #0d6597; cursor: pointer; }
.registration-card .form-submit:not(:disabled):hover { background: #105c86; }
.registration-card .form-submit:disabled { cursor: wait; }
.form-feedback { margin-top: 22px; padding: 16px 18px; border: 1px solid #d8b8ac; border-radius: 10px; color: #744c42; background: #faf3ee; font-size: 13px; line-height: 1.9; white-space: pre-line; overflow-wrap: anywhere; }
.form-feedback.is-success { color: #245f63; background: #e6f3f1; border-color: #b1d2d0; }
.form-feedback:focus { outline: 2px solid #548797; outline-offset: 3px; }
.field-label input[aria-invalid="true"] { border-color: #a16752; }
.registration-result-title { font-family: var(--font); font-size: clamp(22px, 5vw, 34px); font-weight: 500; line-height: 1.6; }
.registration-result { padding: 20px; }

/* 初級LPへの戻りリンク */
.lp-return-link { white-space: nowrap; }
@media (max-width: 860px) {
  .site-header.has-lp-link { flex-wrap: wrap; row-gap: 4px; }
  .has-lp-link .header-nav { width: 100%; justify-content: flex-end; gap: 24px; }
  html { scroll-padding-top: 142px; }
}
@media (max-width: 620px) {
  .has-lp-link .header-nav { justify-content: space-between; gap: 12px; }
  html { scroll-padding-top: 124px; }
}

/* REI専用アイコン。丸い枠とRENのトリミングは維持します。 */
.rei-portrait img { width: 100%; height: 100%; left: 0; top: 0; object-fit: cover; object-position: center; }

/* FAQ最下部の戻りリンクだけを補助ボタンにする */
footer.site-footer.section-shell > a.lp-return-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-sizing: border-box;
  min-height: 44px;
  max-width: 100%;
  padding: 9px 14px;
  border: 1px solid #bed8e5;
  border-radius: 999px;
  background: #f3faff;
  color: #486f80;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: none;
}
footer.site-footer.section-shell > a.lp-return-link > span {
  flex-shrink: 0;
  color: #64899a;
  font-size: 15px;
  line-height: 1;
}
@media (hover: hover) {
  footer.site-footer.section-shell > a.lp-return-link:hover {
    border-color: #a5c8da;
    background: #eaf6fb;
  }
}
@media (max-width: 620px) {
  footer.site-footer.section-shell > a.lp-return-link { margin-left: auto; }
}