:root {
  --paper: #f7f2e7;
  --paper-deep: #ece3d1;
  --ink: #252b29;
  --muted: #6f756d;
  --green: #73805a;
  --blue: #71899a;
  --red: #a85e4a;
  --rule: rgba(37, 43, 41, .2);
  --journey: 0;
  --copy-reveal: 0;
  --night: 0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Yu Mincho", "Hiragino Mincho ProN", Georgia, serif; line-height: 2; letter-spacing: .045em; }
img { display: block; max-width: 100%; }
button { font: inherit; }

.preview-note { position: fixed; z-index: 100; inset: 0 0 auto; padding: 7px 16px; color: #f8f3e8; background: rgba(35, 43, 40, .93); text-align: center; font: 12px/1.5 "Yu Gothic", sans-serif; letter-spacing: .1em; }
.reading-progress { position: fixed; z-index: 101; top: 32px; left: 0; right: 0; height: 2px; background: rgba(255,255,255,.15); }
.reading-progress span { display: block; width: 100%; height: 100%; background: #d1b36a; transform: scaleX(0); transform-origin: left; }

.forest-entry { height: 240vh; background: #f4efe4; }
.forest-sticky, .night-sticky { position: sticky; top: 0; height: 100vh; min-height: 620px; overflow: hidden; isolation: isolate; }
.lab-day, .arch, .night-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.lab-day { inset: 13%; width: 74%; height: 74%; object-fit: contain; transform: scale(calc(1.03 - var(--journey) * .03)); filter: blur(calc((1 - var(--journey)) * 4px)) saturate(.88); opacity: calc(.4 + var(--journey) * .6); }
.arch { pointer-events: none; object-fit: cover; transform-origin: center; }
.mobile-arch { display: none; }
.arch-mid { z-index: 2; transform: scale(calc(1.03 + var(--journey) * .3)); opacity: calc(1 - var(--journey)); }
.arch-front { z-index: 3; transform: scale(calc(1.02 + var(--journey) * .56)); opacity: calc(1 - var(--journey)); }
.forest-shade { position: absolute; z-index: 4; inset: 0; background: radial-gradient(circle at center 56%, transparent 20%, rgba(7,13,10,.12) 48%, rgba(7,13,10,.64) 100%); opacity: calc(1 - var(--journey)); }
.hero-copy { position: absolute; z-index: 5; width: max-content; max-width: calc(100% - 48px); left: 50%; top: 49%; transform: translate(-50%, calc(-44% + (1 - var(--copy-reveal)) * 28px)); padding: 30px 38px; text-align: center; color: #222a27; background: rgba(250,247,239,.72); border: 1px solid rgba(40,49,44,.16); backdrop-filter: blur(1.5px); opacity: var(--copy-reveal); pointer-events: none; }
.forest-entry.copy-ready .hero-copy { opacity: 1; }
.hero-copy .lab-name > span, .hero-copy .recruitment-name, .hero-copy .quiet-button { opacity: 0; transform: translateY(10px); transition: opacity .7s ease, transform .8s ease; }
.forest-entry.copy-ready .hero-copy .lab-name > span, .forest-entry.copy-ready .hero-copy .recruitment-name, .forest-entry.copy-ready .hero-copy .quiet-button { opacity: 1; transform: translateY(0); }
.forest-entry.copy-ready .hero-copy .lab-name > span:first-child { transition-delay: .08s; }
.forest-entry.copy-ready .hero-copy .lab-name > span:last-child { transition-delay: .25s; }
.forest-entry.copy-ready .hero-copy .recruitment-name { transition-delay: .45s; }
.forest-entry.copy-ready .hero-copy .quiet-button { transition-delay: .68s; }
.hero-copy .quiet-button { pointer-events: auto; }
.hero-copy::before, .hero-copy::after { content: ""; position: absolute; width: 22px; height: 22px; border-color: rgba(37,43,41,.48); }
.hero-copy::before { top: 10px; left: 10px; border-top: 1px solid; border-left: 1px solid; }
.hero-copy::after { right: 10px; bottom: 10px; border-right: 1px solid; border-bottom: 1px solid; }
.eyebrow, .edition, .chapter-kicker { margin: 0 0 12px; font: 11px/1.6 "Yu Gothic", sans-serif; letter-spacing: .22em; text-transform: uppercase; }
.edition { display: inline-block; padding: 3px 14px; border-top: 1px solid; border-bottom: 1px solid; }
h1 { margin: 0 0 22px; font-weight: 400; line-height: 1.35; letter-spacing: .08em; }
.lab-name, .recruitment-name { display: block; }
.lab-name > span { display: block; }
.lab-name { font-size: clamp(38px, 5.2vw, 68px); }
.recruitment-name { margin-top: 8px; color: #425747; font-size: clamp(25px, 3.1vw, 40px); letter-spacing: .13em; }
.hero-maincopy { margin: 0 auto 14px; padding-top: 18px; border-top: 1px solid rgba(37,43,41,.3); font-size: clamp(17px, 2vw, 24px); letter-spacing: .12em; }
.hero-lead { margin: 0 auto 25px; font-size: clamp(13px, 1.4vw, 16px); line-height: 2; }
.quiet-button { min-height: 48px; padding: 10px 20px; color: inherit; background: transparent; border: 0; border-bottom: 1px solid; cursor: pointer; letter-spacing: .12em; }
.quiet-button span { display: inline-block; margin-left: 8px; animation: drift 1.8s ease-in-out infinite; }
.scroll-hint { position: absolute; z-index: 6; left: 50%; bottom: 24px; transform: translateX(-50%); margin: 0; color: #fff; font: 10px/1.4 "Yu Gothic", sans-serif; letter-spacing: .22em; text-shadow: 0 1px 5px #000; }
.scroll-hint span { display: block; width: 1px; height: 38px; margin: 0 auto 8px; background: currentColor; transform-origin: top; animation: grow 2s ease-in-out infinite; }

.paper-section { position: relative; padding: clamp(90px, 12vw, 170px) max(24px, calc((100vw - 1160px) / 2)); background-color: var(--paper); background-image: radial-gradient(rgba(60,54,42,.045) .7px, transparent .8px); background-size: 6px 6px; }
.paper-section::after { content: ""; position: absolute; left: 8%; right: 8%; bottom: 0; border-bottom: 1px solid var(--rule); }
.folio { position: absolute; top: 40px; left: max(24px, calc((100vw - 1160px) / 2)); color: var(--muted); font: 10px/1 "Yu Gothic", sans-serif; letter-spacing: .2em; }
.folio span { margin-left: 8px; font-family: Georgia, serif; font-size: 20px; }
.folio span { margin: 0; }
.folio i { margin: 0 7px; font-style: normal; }
.folio b { margin-left: 13px; font-weight: 400; letter-spacing: .18em; }
.paper-section .chapter-kicker { display: none; }
.folio.light { color: #c9d0c6; }
.two-column { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: clamp(40px, 8vw, 110px); }
.copy-block { max-width: 560px; }
.copy-block h2, .center-heading h2, .letter h2, .researcher-copy h2, .offer h2, .final-copy h2 { margin: 8px 0 28px; font-size: clamp(28px, 4vw, 49px); font-weight: 400; line-height: 1.55; letter-spacing: .07em; }
.copy-block p, .letter p, .researcher-copy p { margin: 0 0 1.4em; }
.character-intro { min-height: 820px; }
.figure-card { position: relative; margin: 0; padding: 20px 20px 0; border: 1px solid var(--rule); }
.figure-card img { max-height: 670px; width: 100%; object-fit: contain; }
.figure-card figcaption { margin: 0 -20px; padding: 18px 22px; border-top: 1px solid var(--rule); font-size: 12px; line-height: 2; }
.figure-card b { color: var(--muted); font-family: "Yu Gothic", sans-serif; font-size: 10px; letter-spacing: .15em; }

.center-heading { width: min(780px, 100%); margin: 0 auto 70px; text-align: center; }
.center-heading > p:not(.chapter-kicker) { color: var(--muted); }
.observation-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; margin: 0; padding: 0; list-style: none; background: var(--rule); border: 1px solid var(--rule); }
.observation-grid li { min-height: 270px; padding: 26px 20px; background: var(--paper); }
.observation-grid span, .support-grid b { color: var(--red); font: italic 22px Georgia, serif; }
.observation-grid h3 { margin: 48px 0 12px; font-size: 19px; font-weight: 400; }
.observation-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
.tools-strip { width: min(850px, 100%); max-height: 360px; margin: 70px auto 0; object-fit: cover; object-position: center; mix-blend-mode: multiply; }

.plate-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 70px 44px; }
.plate { position: relative; isolation: isolate; padding: 18px 18px 28px; border: 1px solid var(--rule); text-align: center; }
.plate::before { content: ""; position: absolute; z-index: -1; inset: 0; opacity: .72; transform: rotate(-.7deg); background: radial-gradient(ellipse at 18% 22%, var(--wash) 0 26%, transparent 58%), radial-gradient(ellipse at 82% 38%, var(--wash) 0 22%, transparent 56%), radial-gradient(ellipse at 48% 84%, var(--wash) 0 32%, transparent 66%); filter: blur(3px); }
.plate:nth-child(even)::before { transform: rotate(.8deg) scale(1.03); background: radial-gradient(ellipse at 76% 20%, var(--wash) 0 27%, transparent 61%), radial-gradient(ellipse at 24% 48%, var(--wash) 0 24%, transparent 59%), radial-gradient(ellipse at 60% 88%, var(--wash) 0 31%, transparent 67%); }
.plate:nth-child(1) { --wash: rgba(224, 150, 160, .16); }
.plate:nth-child(2) { --wash: rgba(137, 190, 166, .16); }
.plate:nth-child(3) { --wash: rgba(164, 91, 69, .14); }
.plate:nth-child(4) { --wash: rgba(111, 156, 190, .15); }
.plate img { width: 100%; aspect-ratio: 1/1; padding: 20px; object-fit: contain; background: rgba(255,255,255,.28); }
.plate-no { position: absolute; z-index: 2; top: -12px; left: 22px; padding: 0 9px; background: var(--paper); color: var(--muted); font: italic 14px Georgia, serif; }
.plate h3 { margin: 25px 0 3px; font-size: 21px; font-weight: 400; }
.plate p { margin: 0; color: var(--muted); font-size: 13px; }
.note-line { width: min(800px, 100%); margin: 75px auto 0; padding: 28px; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); text-align: center; }

.parcel-layout { grid-template-columns: .9fr 1.1fr; }
.parcel-figure { margin: 0; }
.parcel-figure img { mix-blend-mode: multiply; }
.specimen-list { margin: 28px 0; padding: 0; list-style: none; border-top: 1px solid var(--rule); }
.specimen-list li { padding: 10px 4px 10px 27px; border-bottom: 1px solid var(--rule); position: relative; }
.specimen-list li::before { content: "◇"; position: absolute; left: 3px; color: var(--green); }
.small-note, .provisional, .offer-note { color: var(--muted); font-size: 12px; line-height: 1.9; }

.timeline { width: min(860px, 100%); margin: auto; }
.month { display: grid; grid-template-columns: 90px 1fr; gap: 30px; position: relative; padding: 18px 0 55px; }
.month::before { content: ""; position: absolute; left: 44px; top: 80px; bottom: 0; border-left: 1px solid var(--rule); }
.month > span { display: grid; place-items: center; width: 88px; height: 88px; border: 1px solid var(--rule); border-radius: 50%; color: var(--red); font: italic 33px Georgia, serif; background: var(--paper); }
.month div > p:first-child { margin: 0; color: var(--muted); font: 11px "Yu Gothic", sans-serif; letter-spacing: .18em; }
.month h3 { margin: 3px 0 8px; font-size: 25px; font-weight: 400; }
.month div > p:last-child { margin: 0; color: var(--muted); }

.ink-section { position: relative; padding: clamp(100px, 12vw, 170px) max(24px, calc((100vw - 1160px) / 2)); color: #eef0e7; background: #27322e; }
.ink-section .chapter-kicker { color: #acb9a9; }
.support-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.15); }
.support-grid article { padding: clamp(28px, 4vw, 52px); background: #27322e; }
.support-grid h3 { margin: 26px 0 13px; font-size: 22px; font-weight: 400; }
.support-grid p { margin: 0; color: #c3cbc1; font-size: 14px; }
.provisional { margin: 35px 0 0; text-align: center; color: #aeb9af; }

.letter { width: min(780px, 100%); margin: auto; padding: clamp(36px, 7vw, 90px); background: rgba(255,255,255,.34); box-shadow: 0 25px 70px rgba(63,51,34,.08); border: 1px solid rgba(80,66,42,.12); }
.letter h2 { font-size: clamp(27px, 3.7vw, 43px); }
.salutation { font-size: 14px; }
.signature { margin-top: 45px !important; text-align: right; }
.signature b { font: italic 30px Georgia, serif; }

.researcher-section { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr); align-items: center; gap: 50px; }
.researcher-visual img { width: 100%; mix-blend-mode: multiply; }
.researcher-copy { padding-right: 5vw; }

.offer-card { width: min(830px, 100%); margin: auto; padding: clamp(35px, 7vw, 80px); border: 1px solid var(--ink); background: rgba(255,255,255,.22); }
.offer-card > .chapter-kicker, .offer-card > h2 { text-align: center; }
.offer-card dl { margin: 50px 0 30px; border-top: 1px solid var(--rule); }
.offer-card dl div { display: grid; grid-template-columns: 180px 1fr; gap: 30px; padding: 21px 0; border-bottom: 1px solid var(--rule); }
.offer-card dt { color: var(--muted); font: 12px/2 "Yu Gothic", sans-serif; letter-spacing: .12em; }
.offer-card dd { margin: 0; }
.offer-card dd strong { font-size: 28px; font-weight: 400; }
.offer-card dd span { display: block; color: var(--muted); font-size: 12px; }

.faq-list { width: min(860px, 100%); margin: auto; border-top: 1px solid var(--rule); }
.faq-list details { border-bottom: 1px solid var(--rule); }
.faq-list summary { position: relative; padding: 25px 50px 25px 36px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before { content: "Q"; position: absolute; left: 2px; color: var(--red); font: italic 20px Georgia, serif; }
.faq-list summary::after { content: "+"; position: absolute; right: 8px; font: 24px Georgia, serif; transition: transform .3s; }
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list details p { margin: 0; padding: 0 36px 28px; color: var(--muted); }

.night-journey { height: 180vh; background: #152132; }
.night-image { object-position: center; }
.night-bright { z-index: 2; opacity: var(--night); }
.night-dim { z-index: 1; }
.night-overlay { position: absolute; z-index: 3; inset: 0; background: linear-gradient(to bottom, rgba(6,15,28,.08), rgba(6,13,22,.15) 45%, rgba(6,13,22,.72)); }
.final-copy { position: absolute; z-index: 4; left: 50%; bottom: 7vh; width: min(720px, calc(100% - 40px)); transform: translateX(-50%); padding: 28px 35px; color: #fff9e9; text-align: center; text-shadow: 0 2px 8px rgba(0,0,0,.5); opacity: calc(.22 + var(--night) * .78); }
.final-copy h2 { margin-bottom: 18px; }
.cta { display: inline-flex; align-items: center; justify-content: center; gap: 15px; min-height: 58px; margin-top: 16px; padding: 13px 28px; color: #334039; background: #f5ead1; border: 1px solid rgba(255,255,255,.5); cursor: pointer; opacity: .96; text-decoration: none; }
.cta:hover { background: #fff4dc; }
.cta:focus-visible { outline: 2px solid #f5ead1; outline-offset: 4px; }
.cta span { padding-left: 15px; border-left: 1px solid rgba(51,64,57,.3); font: 10px "Yu Gothic", sans-serif; letter-spacing: .15em; }
.cta-note { margin: 8px 0 0; font: 11px "Yu Gothic", sans-serif; }
.floating-cta { position: fixed; z-index: 20; right: clamp(18px, 2.5vw, 36px); bottom: clamp(18px, 2.5vw, 34px); visibility: hidden; opacity: 0; transform: translateY(14px); pointer-events: none; transition: opacity .35s ease, transform .35s ease, visibility 0s linear .35s; }
.floating-cta.is-visible { visibility: visible; opacity: 1; transform: translateY(0); pointer-events: auto; transition-delay: 0s; }
.floating-cta a { display: inline-flex; align-items: center; justify-content: center; min-height: 58px; padding: 14px 30px; color: #fffdf7; background: linear-gradient(rgba(255,255,255,.025), rgba(0,0,0,.055)), #263d32; border: 2px solid #96763c; border-radius: 8px; box-shadow: inset 0 0 0 4px #263d32, inset 0 0 0 5px rgba(177,149,88,.82), 0 8px 22px rgba(23,36,29,.22); font-family: "Yu Mincho", "Hiragino Mincho ProN", Georgia, serif; font-size: 15px; font-weight: 700; line-height: 1.5; letter-spacing: .1em; text-decoration: none; text-shadow: 0 1px 1px rgba(0,0,0,.36); }
.floating-cta a:hover { color: #fff; background: linear-gradient(rgba(255,255,255,.05), rgba(0,0,0,.035)), #304b3d; border-color: #aa8a4b; }
.floating-cta a:focus-visible { outline: 2px solid #b19558; outline-offset: 4px; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .9s ease, transform .9s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
footer { display: flex; justify-content: space-between; padding: 35px max(24px, calc((100vw - 1160px) / 2)); color: #b9c0b8; background: #151d1a; font-size: 11px; letter-spacing: .15em; }

@keyframes drift { 50% { transform: translateY(5px); } }
@keyframes grow { 0%,100% { transform: scaleY(.25); opacity: .3; } 50% { transform: scaleY(1); opacity: 1; } }

@media (max-width: 800px) {
  .preview-note { font-size: 10px; }
  .reading-progress { top: 29px; }
  .forest-sticky, .night-sticky { min-height: 570px; }
  .forest-sticky { background: var(--paper); }
  .lab-day { inset: 7% 4% auto; width: 92%; height: 52%; object-position: center; transform: scale(calc(.82 + var(--journey) * .18)); transform-origin: center 45%; }
  .night-image { object-position: center 45%; }
  .arch { display: none; }
  .mobile-arch { display: block; position: absolute; z-index: 3; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 44%; pointer-events: none; will-change: transform, opacity, filter; clip-path: none; transform-origin: center 42%; }
  .mobile-arch-left { opacity: calc((1 - var(--journey)) * .42); filter: blur(1.4px); transform: scale(calc(.78 + var(--journey) * .55)); }
  .mobile-arch-right { opacity: calc(1 - var(--journey) * 1.04); transform: scale(calc(1 + var(--journey) * .92)); }
  .forest-shade { inset: 0; height: 100%; background: radial-gradient(ellipse at center 42%, rgba(10,17,13,.34) 0%, rgba(10,17,13,.5) 58%, rgba(10,17,13,.62) 100%); opacity: calc(1 - var(--journey)); -webkit-mask-image: none; mask-image: none; }
  .hero-copy { top: 48%; bottom: 0; width: 100%; max-width: none; padding: 26px 18px 28px; transform: translateX(-50%); background: var(--paper); border: 0; backdrop-filter: none; display: flex; flex-direction: column; justify-content: flex-start; }
  .hero-copy::before, .hero-copy::after { display: none; }
  .lab-name { font-size: clamp(34px, 10vw, 43px); line-height: 1.28; }
  .lab-name > span:first-child { margin-bottom: 3px; font: 16px/1.4 Georgia, serif; letter-spacing: .24em; text-transform: lowercase; }
  .lab-name > span:last-child { letter-spacing: .14em; }
  .recruitment-name { margin-top: 15px; font-size: clamp(18px, 5.4vw, 23px); letter-spacing: .16em; }
  .hero-copy h1 { margin-bottom: 20px; }
  .hero-copy .quiet-button { color: #faf7ef; background: #28302d; border-color: #28302d; box-shadow: 0 5px 0 rgba(20,25,23,.18); }
  .hero-copy .quiet-button:active { transform: translateY(2px); box-shadow: 0 3px 0 rgba(20,25,23,.18); }
  .scroll-hint { display: none; }
  .hero-maincopy { font-size: 15px; letter-spacing: .07em; }
  .hero-lead br { display: none; }
  .two-column, .researcher-section { grid-template-columns: 1fr; }
  .character-intro { min-height: 0; }
  .copy-block { order: 1; }
  .figure-card { order: 2; width: min(430px, 100%); margin: auto; }
  .observation-grid { grid-template-columns: 1fr; }
  .observation-grid li { min-height: 0; padding: 22px; }
  .observation-grid h3 { margin: 10px 0 4px; }
  .plate-grid, .support-grid { grid-template-columns: 1fr; }
  .parcel-figure { width: min(470px, 100%); margin: auto; }
  .researcher-section { padding-left: 0; padding-right: 0; gap: 0; }
  .researcher-section .folio { left: 24px; }
  .researcher-visual { overflow: hidden; }
  .researcher-visual img { width: 140%; max-width: none; transform: translateX(-18%); }
  .researcher-copy { padding: 60px 24px 100px; }
  .offer-card dl div { grid-template-columns: 1fr; gap: 2px; }
  .month { grid-template-columns: 64px 1fr; gap: 18px; }
  .month > span { width: 62px; height: 62px; }
  .month::before { left: 31px; top: 62px; }
  footer { display: block; text-align: center; }
  .floating-cta { right: 14px; bottom: max(14px, env(safe-area-inset-bottom)); left: 14px; text-align: center; }
  .floating-cta a { width: 100%; min-height: 56px; padding: 12px 22px; border-radius: 8px; box-shadow: inset 0 0 0 4px #263d32, inset 0 0 0 5px rgba(177,149,88,.82), 0 7px 20px rgba(23,36,29,.2); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .lab-day { filter: none; opacity: 1; transform: none; }
  .arch { opacity: .42; transform: scale(1.22); }
  .hero-copy, .final-copy { opacity: 1; transform: translate(-50%, -44%); }
  .final-copy { transform: translateX(-50%); }
  .night-bright { opacity: .7; }
  .reveal { opacity: 1; transform: none; }
  .floating-cta { transition: none; }
}

/* セールスレター第2稿：図鑑本文と透過図版 */
.narrow-copy { width: min(760px, 100%); margin: 0 auto; }
.narrow-copy h2 { margin: 8px 0 34px; font-size: clamp(30px, 4vw, 50px); font-weight: 400; line-height: 1.55; }
.narrow-copy > p, .prose p { margin: 0 0 1.45em; }
.cutout-figure { margin: 0; text-align: center; }
.cutout-figure img { width: 100%; max-height: 720px; object-fit: contain; filter: drop-shadow(0 18px 22px rgba(51,46,37,.08)); }
.cutout-figure figcaption { display: inline-block; margin-top: 16px; padding: 12px 22px; color: var(--muted); border-top: 1px solid var(--rule); font-size: 11px; line-height: 2; }
.cutout-tools { object-fit: contain; mix-blend-mode: normal; }
.observation-lines, .paired-lines { margin: 38px 0; padding: 28px clamp(22px,5vw,54px); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); color: #425747; }
.observation-lines p, .paired-lines p { margin: .4em 0; }
.quiet-steps { margin: 28px 0; padding-left: 22px; color: #425747; border-left: 1px solid var(--green); }
.quiet-steps p { margin: .2em 0; }
.paired-lines { text-align: center; font-size: clamp(18px,2.4vw,25px); }
.plate img { background: transparent; padding: 4px; }
.plate p { max-width: 410px; margin: 0 auto; }
.season-note { margin-top: 70px; }
.small-note { color: var(--muted); font-size: 12px; }
.letter-long { width: min(760px, 100%); }
.letter-long h2 { margin-bottom: 45px; }
.letter-salutation { color: var(--red); letter-spacing: .12em; }
.letter-section .letter-long { position: relative; padding: clamp(46px,7vw,78px) clamp(28px,6vw,64px); background-color: #e7d19d; background-image: linear-gradient(90deg, rgba(92,55,24,.18), transparent 7%, transparent 93%, rgba(92,55,24,.16)), radial-gradient(ellipse at 14% 18%, rgba(126,74,33,.2), transparent 27%), radial-gradient(ellipse at 84% 72%, rgba(110,65,29,.17), transparent 31%), radial-gradient(circle at 72% 9%, rgba(99,57,25,.11), transparent 9%), radial-gradient(circle at 23% 87%, rgba(99,57,25,.12), transparent 11%); box-shadow: inset 0 0 46px rgba(83,49,20,.19), 0 14px 32px rgba(61,49,33,.14); clip-path: polygon(1.2% 0, 98.7% .8%, 99.4% 8%, 98.6% 17%, 99.5% 29%, 98.8% 43%, 99.6% 58%, 98.7% 72%, 99.4% 87%, 98.2% 100%, 1.5% 99.2%, .6% 91%, 1.3% 78%, .5% 65%, 1.2% 51%, .4% 37%, 1.3% 23%, .5% 11%); font-family: "Yu Kyokasho", "Klee One", serif; line-height: 2.15; }
.letter-section .letter-long::before { content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .38; background: repeating-linear-gradient(16deg, rgba(73,47,24,.035) 0 1px, transparent 1px 7px), repeating-linear-gradient(103deg, rgba(255,250,222,.08) 0 2px, transparent 2px 11px); mix-blend-mode: multiply; }
.letter-section .letter-long > * { position: relative; z-index: 1; }
.letter-section .letter-long p:not(.signature) { margin-bottom: 1.55em; background-image: repeating-linear-gradient(to bottom, transparent 0 calc(2.15em - 1px), rgba(112,76,42,.22) calc(2.15em - 1px) 2.15em); background-position: 0 0; }
.signature { position: relative; margin-top: 52px !important; min-height: 104px; padding: 0 8px 22px 0; text-align: right; }
.signature b { font: italic 28px Georgia, serif; }
.lab-emblem { position: absolute; right: -2px; top: -9px; display: grid; place-items: center; width: 96px; height: 96px; color: rgba(140,35,29,.64); transform: rotate(-8deg); }
.lab-emblem img { grid-area: 1 / 1; width: 100%; height: 100%; object-fit: contain; opacity: .58; }
.lab-emblem > span { grid-area: 1 / 1; align-self: end; width: 90px; margin-bottom: 5px; padding: 2px; background: rgba(231,209,157,.72); border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; font: 700 7px/1.05 Georgia, serif; letter-spacing: .12em; text-align: center; }
.lab-emblem small { display: block; margin-top: 1px; font-size: 4.7px; letter-spacing: .045em; white-space: nowrap; }
.letter-envelope-scene { position: relative; width: 100%; aspect-ratio: 3 / 2; margin: 0; }
.letter-envelope-scene .envelope-state { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; transition: opacity 1.05s ease, transform 1.25s ease; }
.letter-envelope-scene .envelope-closed { opacity: 1; transform: rotate(-1deg) scale(.97); }
.letter-envelope-scene .envelope-open { opacity: 0; transform: translateY(12px) scale(.94); }
.letter-section.is-awake .envelope-closed { opacity: 0; transform: translateY(-8px) rotate(1deg) scale(.95); transition-delay: 1.7s; }
.letter-section.is-awake .envelope-open { opacity: 1; transform: translateY(0) scale(1); transition-delay: 1.75s; }
.parcel-figure img { mix-blend-mode: normal; }
.kit-list { margin: 25px 0 30px; padding: 24px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); list-style: none; }
.kit-list li { position: relative; padding-left: 1.5em; }
.kit-list li::before { content: "◇"; position: absolute; left: 0; color: var(--green); }
.section-cta { width: min(760px, 100%); margin: 58px auto 0; padding: 28px clamp(22px,5vw,48px); border: 1px solid var(--rule); background: rgba(255,255,255,.24); text-align: center; }
.section-cta p { margin: 0; color: var(--muted); font-size: 13px; }
.section-cta .cta { color: #f7f3e9; background: #28302d; border-color: #28302d; }
.section-cta .cta:hover { background: #35413c; }
.section-cta .cta:focus-visible { outline-color: #28302d; }
.wide-cutout img { max-height: 620px; }
.support-grid { grid-template-columns: repeat(5, 1fr); }
.page-symbol.shared-research-notebook { margin: 18px auto 24px; }
.page-symbol.shared-research-notebook img { display: block; width: 100%; max-height: 450px; object-fit: contain; }
.support-section .support-grid { gap: 14px; background: transparent; border: 0; }
.support-section .support-grid article { position: relative; color: var(--ink); background: rgba(252,248,239,.8); border: 1px solid rgba(73,70,60,.2); box-shadow: 3px 5px 0 rgba(73,70,60,.055); }
.support-section .support-grid article:nth-child(even) { background: rgba(239,237,218,.72); transform: rotate(.25deg); }
.support-section .support-grid article:nth-child(odd) { transform: rotate(-.18deg); }
.support-section .support-grid h3 { color: var(--ink); }
.support-section .support-grid p { color: var(--muted); }
.offer-inner { width: min(900px, 100%); margin: 0 auto; }
.offer-inner > h2 { text-align: center; }
.included, .first-price { margin: 34px auto; padding: 26px; border-left: 2px solid var(--green); background: rgba(255,255,255,.25); }
.offer details { margin-top: 34px; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.offer summary { min-height: 54px; padding: 15px 4px; cursor: pointer; }
.terms-copy { padding: 10px 4px 28px; color: var(--muted); font-size: 13px; }
.terms-copy p { margin: 0 0 1em; }
.faq summary > span { display: none; }
.opening, .theme-section, .method-section, .pace-section, .completion-section { overflow: hidden; }

.page-layout { display: grid; grid-template-columns: minmax(280px,.9fr) minmax(0,1.1fr); gap: clamp(48px,7vw,110px); align-items: start; }
.page-layout.page-reverse .page-visual { grid-column: 2; }
.page-layout.page-reverse .page-body { grid-column: 1; grid-row: 1; }
.page-visual { position: sticky; top: 90px; min-width: 0; }
.page-visual h2 { margin: 0 0 34px; font-size: clamp(30px,3.7vw,48px); font-weight: 400; line-height: 1.55; letter-spacing: .07em; }
.page-symbol { display: block; width: 100%; max-height: 520px; margin: 0 auto; object-fit: contain; filter: drop-shadow(0 18px 22px rgba(51,46,37,.08)); }
.page-symbol.cutout-figure { width: 100%; }
.page-symbol.cutout-figure img { max-height: 520px; }
.page-symbol.hourglass-figure { margin: 0; }
.page-symbol.hourglass-figure img { display: block; width: 100%; max-height: 430px; object-fit: contain; mix-blend-mode: multiply; }
.laboratory-intro .page-symbol { padding: 0; background: transparent; border: 0; }
.page-body { min-width: 0; padding-top: 12px; }
.page-body > .two-column, .page-body > .parcel-layout { display: block; }
.page-body > .narrow-copy, .page-body > .letter-long, .page-body > .offer-inner { width: 100%; }
.page-body > .center-heading { width: 100%; margin: 0 0 44px; text-align: left; }
.page-body > .center-heading > p { color: var(--ink); }
.page-body .plate-grid { grid-template-columns: 1fr 1fr; gap: 38px 24px; }
.page-body .support-grid { grid-template-columns: 1fr 1fr; }
.page-body .season-note { width: 100%; }
.keyphrase { color: var(--red); font-weight: 600; }
.chapter-next { display: grid; grid-template-columns: 1fr auto; align-items: center; width: 100%; margin: 52px 0 0; padding: 17px 20px 16px; color: #f7f3e9; background: #28302d; border: 1px solid #28302d; box-shadow: 0 5px 0 rgba(20,25,23,.14); cursor: pointer; text-align: left; }
.chapter-next span { grid-column: 1; margin-bottom: 4px; color: #bdc7be; font: 9px/1.4 "Yu Gothic", sans-serif; letter-spacing: .2em; }
.chapter-next b { grid-column: 1; font-weight: 400; font-size: 13px; line-height: 1.65; letter-spacing: .08em; }
.chapter-next b small { display: block; margin-top: 3px; color: #bdc7be; font: 9px/1.5 Georgia, serif; letter-spacing: .12em; }
.chapter-next i { grid-column: 2; grid-row: 1 / 3; padding-left: 18px; font-style: normal; font-size: 18px; animation: drift 1.8s ease-in-out infinite; }
.chapter-next:hover { background: #35413c; }
.chapter-next:active { transform: translateY(2px); box-shadow: 0 3px 0 rgba(20,25,23,.14); }

.mist-char { display: inline-block; opacity: 0; filter: blur(10px); transform: translateY(8px); transition: opacity 1.35s ease var(--mist-delay), filter 1.7s ease var(--mist-delay), transform 1.5s ease var(--mist-delay); }
.page-symbol { opacity: 0; filter: blur(7px) drop-shadow(0 18px 22px rgba(51,46,37,.08)); transform: translateY(16px); transition: opacity 1.35s ease 1.05s, filter 1.55s ease 1.05s, transform 1.4s ease 1.05s; }
.page-body { opacity: 0; filter: blur(5px); transform: translateY(18px); transition: opacity 1.35s ease 1.65s, filter 1.5s ease 1.65s, transform 1.4s ease 1.65s; }
.paper-section.is-awake .mist-char { opacity: 1; filter: blur(0); transform: translateY(0); }
.paper-section.is-awake .page-symbol, .paper-section.is-awake .page-body { opacity: 1; filter: blur(0) drop-shadow(0 18px 22px rgba(51,46,37,.08)); transform: translateY(0); }
.paper-section.is-awake .page-body { filter: blur(0); }

.museum-label { width: min(430px,100%); margin: 18px auto 0 !important; padding: 18px 20px !important; color: var(--ink) !important; background: rgba(242,235,218,.9); border: 1px solid rgba(62,65,57,.35) !important; box-shadow: 3px 4px 0 rgba(62,65,57,.07); text-align: left; font-family: "Yu Gothic", sans-serif; }
.museum-label small { display: block; margin-bottom: 12px; padding-bottom: 9px; border-bottom: 1px solid var(--rule); color: var(--muted); font-size: 8px; letter-spacing: .12em; }
.museum-label dl { margin: 0; }
.museum-label dl div { display: grid; grid-template-columns: 76px 1fr; gap: 10px; padding: 5px 0; border-bottom: 1px dotted rgba(62,65,57,.2); }
.museum-label dt { color: var(--muted); font-size: 10px; letter-spacing: .1em; }
.museum-label dd { margin: 0; font-size: 11px; line-height: 1.7; }
.opening { overflow: visible; }
.opening .page-layout { min-height: 980px; }

@media (max-width: 1000px) {
  .support-grid { grid-template-columns: repeat(2, 1fr); }
  .page-layout { grid-template-columns: minmax(250px,.85fr) minmax(0,1.15fr); gap: 42px; }
  .page-body .plate-grid, .page-body .support-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .cutout-figure img { max-height: 540px; }
  .support-grid { grid-template-columns: 1fr; }
  .letter-long { padding-inline: 0; }
  .folio b { display: block; margin: 7px 0 0; }
  .page-layout, .page-layout.page-reverse { display: flex; flex-direction: column; gap: 18px; }
  .page-visual { position: static; width: 100%; }
  .page-layout.page-reverse .page-visual, .page-layout.page-reverse .page-body { grid-column: auto; grid-row: auto; }
  .paper-section { padding-top: 82px; padding-bottom: 82px; }
  .page-body { width: 100%; font-size: 15px; line-height: 1.9; }
  .page-body p { margin-bottom: 1.2em; }
  .opening .page-layout { min-height: 0; }
  .opening .page-visual h2 { margin-bottom: 16px; }
  .opening .page-symbol.cutout-figure img { display: block; max-height: 500px; }
  .seasons .page-visual h2 { font-size: 25px; letter-spacing: .035em; }
  .method-section .page-visual h2 { font-size: 24px; letter-spacing: .035em; }
  .pace-section .page-visual h2 { margin-bottom: 12px; }
  .pace-section .page-symbol.hourglass-figure { width: min(88vw, 370px); margin: 24px auto 18px; }
  .pace-section .page-symbol.hourglass-figure img { max-height: 320px; }
  .chapter-next { margin-top: 38px; }
  .theme-section .page-symbol, .seasons .page-symbol { width: min(88vw, 370px); max-height: 380px; margin: 24px auto 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .mist-char, .page-symbol, .page-body { opacity: 1; filter: none; transform: none; transition: none; }
}

/* 2026-10-07：最新企画の情報整理。既存の図鑑・演出を維持 */
.reading-progress { top: 0; }
.material-group { margin: 28px 0; }
.material-group h3, .support-boundary h3 { font-size: 18px; font-weight: 500; }
.material-group .kit-list { margin: 12px 0 0; padding: 16px 0; }
.support-section .page-body .support-grid { grid-template-columns: 1fr; gap: 24px; }
.support-section .support-grid article { padding: 26px clamp(22px, 3vw, 36px); }
.support-grid h4 { margin: 26px 0 10px; font-size: 16px; font-weight: 600; }
.support-grid ul, .session-topics { padding-left: 1.3em; }
.support-grid li { margin-bottom: .35em; }
.support-grid p:last-child { margin-bottom: 0; }
.support-boundary { margin: 32px 0; padding: 24px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.support-boundary h3 { margin: 0 0 16px; }
.support-boundary h3:not(:first-child) { margin-top: 28px; }
.explanation-session { margin-top: 42px; padding: 28px 0; border-top: 1px solid var(--rule); }
.explanation-session h3 { font-size: clamp(22px, 2.5vw, 28px); font-weight: 400; line-height: 1.65; }
.explanation-session .cta { color: #f7f3e9; background: #28302d; border-color: #28302d; }
.explanation-session .cta:focus-visible { outline-color: #28302d; }
.offer-table { margin: 26px 0; border-top: 1px solid var(--rule); }
.offer-table > div { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--rule); }
.offer-table dt { color: var(--muted); font-size: 14px; }
.offer-table dd { margin: 0; }
.offer-table small { display: block; font-size: 13px; line-height: 1.8; }
.support-section .support-grid p { margin: 0 0 1em; font-size: 15px; line-height: 1.9; }
.final-copy { opacity: 1; background: rgba(15, 25, 22, .78); border: 1px solid rgba(246, 235, 209, .28); text-shadow: 0 2px 4px rgba(0,0,0,.65); }
.final-copy .chapter-kicker, .final-copy .cta-note { color: #f5ead1; }
.cta { max-width: 100%; min-height: 52px; box-sizing: border-box; }
.small-note { font-size: 14px; line-height: 1.85; }
@media (max-width: 720px) {
  .offer-table > div { grid-template-columns: 1fr; gap: 4px; }
  .letter-section .letter-long { padding: 34px 22px; }
  .letter-section .letter-long p:not(.signature) { margin-bottom: 1.65em; }
  .letter-long p br { display: none; }
  .page-body .plate-grid { gap: 38px; }
  .plate h3 { font-size: 18px; }
  .plate p, .faq summary, .faq details p { font-size: 15px; line-height: 1.9; }
  .faq summary { padding-right: 32px; }
  .support-section .support-grid article { padding: 24px 20px; }
  .cta { padding: 16px 18px; font-size: 15px; letter-spacing: .04em; }
  .floating-cta a { font-size: 14px; letter-spacing: .04em; }
  .final-copy { bottom: max(22px, env(safe-area-inset-bottom)); padding: 24px 18px; }
  .final-copy h2 { font-size: clamp(25px, 7vw, 32px); line-height: 1.55; }
  .final-message p { font-size: 14px; line-height: 1.8; }
}

/* 夜景で画面を満たし、点灯とメッセージを短いスクロールで重ねる */
.night-journey { height: 160vh; background: var(--paper); }
.night-sticky { background: var(--paper); }
.night-image { inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.night-bright { opacity: var(--night-light, 0); }
.final-copy { opacity: var(--night-message, 0); visibility: hidden; transform: translate(-50%, calc((1 - var(--night-message, 0)) * 16px)); background-color: rgba(15,25,22,.78); background-image: repeating-linear-gradient(135deg, rgba(245,234,209,.035) 0 1px, transparent 1px 5px); }
.final-addressee { margin: 18px 0 10px; font-size: 19px; letter-spacing: .12em; }
@media (max-width: 720px) {
  .night-image { inset: 0; width: 100%; height: 100%; object-position: center 45%; }
  .final-addressee { font-size: 17px; margin: 14px 0 10px; }
}
@media (prefers-reduced-motion: reduce) {
  .night-bright { opacity: 1; }
  .final-copy { opacity: 1; visibility: visible; transform: translateX(-50%); }
}

/* 正式外観・正式ロゴ。画像原本やその他の図版は維持 */
.lab-day { object-fit: contain; }
.official-hero-logo { display: block; width: clamp(140px, 16vw, 205px); height: auto; margin: 0 auto 12px; }
.lab-emblem.official-signature-logo { position: static; display: block; width: 135px; height: auto; margin: 22px 0 0 auto; transform: none; }
.official-signature-logo img { display: block; width: 100%; height: auto; opacity: 1; }
.night-dim { filter: none; }
.night-bright { filter: none; opacity: 1; }
@media (max-width: 800px) {
  .official-hero-logo { width: 135px; margin-bottom: 8px; }
  .hero-copy { padding-top: 16px; }
  .hero-copy h1 { margin-bottom: 12px; }
  .hero-copy .recruitment-name { margin-top: 8px; }
  .night-sticky { background: #0b203f; }
  .night-image { object-fit: contain; object-position: center 30%; }
  .lab-emblem.official-signature-logo { width: 125px; }
}
@media (prefers-reduced-motion: reduce) {
  .night-dim { filter: none; }
}

/* 冒頭の正式ロゴを文字と同じ静かなフェードで表示 */
.hero-copy .official-hero-logo { opacity: 0; transform: translateY(10px); transition: opacity 1.1s ease .08s, transform 1.2s ease .08s; }
.forest-entry.copy-ready .official-hero-logo { opacity: 1; transform: translateY(0); }
/* 前の紙面から夜空へ、章の境界を柔らかくつなぐ */
.night-journey { position: relative; background: linear-gradient(to bottom, var(--paper), #0b203f 220px); }
.night-journey::before { content: ""; position: absolute; inset: 0 0 auto; height: clamp(130px, 20vh, 220px); z-index: 5; pointer-events: none; background: linear-gradient(to bottom, var(--paper) 0%, rgba(244,239,228,.72) 24%, rgba(244,239,228,.22) 65%, transparent 100%); }
.night-sticky { background: #0b203f; }
.night-dim, .night-bright { filter: none; }
.night-bright { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .hero-copy .official-hero-logo { opacity: 1; transform: none; transition: none; }
}

/* スマホのスクロール時に大きな透過画像を再描画する負荷を抑える */
@media (max-width: 800px) {
  .page-symbol,
  .page-body,
  .mist-char,
  .paper-section.is-awake .page-symbol,
  .paper-section.is-awake .page-body,
  .paper-section.is-awake .mist-char,
  .cutout-figure img,
  .lab-day,
  .mobile-arch { filter: none; }
  .page-symbol { transition: opacity 1.35s ease 1.05s, transform 1.4s ease 1.05s; }
  .page-body { transition: opacity 1.35s ease 1.65s, transform 1.4s ease 1.65s; }
  .mist-char { transition: opacity 1.35s ease var(--mist-delay), transform 1.5s ease var(--mist-delay); }
  .page-symbol.hourglass-figure img { mix-blend-mode: normal; }
  .mobile-arch { will-change: auto; }
}

/* スマホの挿絵：画像が画面に入ってから透明度のみで表示 */
@media (max-width: 800px) {
  .paper-section .art-fade,
  .paper-section.is-awake .art-fade {
    opacity: 0;
    filter: none;
    transform: none;
    transition: opacity 1.6s ease;
  }
  .paper-section .art-fade.art-ready,
  .paper-section.is-awake .art-fade.art-ready { opacity: 1; }
}
@media (max-width: 800px) and (prefers-reduced-motion: reduce) {
  .paper-section .art-fade,
  .paper-section.is-awake .art-fade { opacity: 1; transition: none; }
}