:root {
  --ink: #4e3f07;
  --green: #4b593d;
  --gold: #b78f4b;
  --paper: #f4e5c4;
}
*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; min-width: 320px; color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; }
button { font: inherit; cursor: pointer; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; }

.skip-link { position: fixed; top: 8px; left: 8px; z-index: 20; padding: 10px 14px; transform: translateY(-170%); background: var(--green); color: white; }
.skip-link:focus { transform: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* 原画前两屏共用一张长图；云雾在第一屏上升，盖满后显露第二屏。 */
.fog-journey { position: relative; height: 520svh; background: var(--paper); }
.fog-scene { position: sticky; top: 0; height: 100svh; overflow: hidden; isolation: isolate; background: #e7ca96; }
.fog-backdrop { position: absolute; top: 0; left: 50%; width: min(100%, 1920px); height: 100%; overflow: hidden; transform: translateX(-50%); }
.fog-backdrop img { position: absolute; top: 0; left: 0; display: block; width: 100%; height: auto; max-width: none; }
.fog-backdrop--map { opacity: 0; }
.fog-backdrop--map img { transform: translateY(-9.049%); }
.fog-frame { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: cover; pointer-events: none; opacity: 0; }
.fog-frame--rise { transform: translateY(22%); }
.fog-frame--open { transform: scale(1.04); }
.mobile-fog { display: none; }
/* 云雾末帧已经展示地图；长图从地图之后继续，不再把同一幅地图显示第二次。 */
.design-page { position: relative; width: min(100%, 1920px); aspect-ratio: 1920 / 5417; margin: auto; overflow: hidden; background: var(--paper); }
.design-page__canvas { position: absolute; top: -39.874%; left: 0; width: 100%; aspect-ratio: 1920 / 11935; }
.design-image { position: absolute; inset: 0; width: 100%; height: 100%; display: block; object-fit: fill; }
/* 最新 Figma：导航底图为 995×86，文字在底图内严格水平、垂直居中。 */
.site-header { position: fixed; z-index: 10; top: clamp(10px, 2.2917vw, 44px); left: 0; width: 100%; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.site-header__inner { position: relative; width: min(51.8229vw, 995px); height: min(4.4792vw, 86px); margin: auto; background: url("https://res.cloudinary.com/mwsa3enq/image/upload/header%E5%BA%95.png") center / 100% 100% no-repeat; pointer-events: auto; transition: opacity .16s linear; }
.site-nav { position: absolute; inset: 0 3.015%; display: flex; align-items: center; }
.site-nav a { flex: 1 1 0; min-width: 0; height: 100%; display: flex; justify-content: center; align-items: center; padding: 0 2px; border-radius: 100px; color: #cda45d; font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-size: min(1.875vw, 36px); font-weight: 400; line-height: 1; letter-spacing: 0; text-decoration: none; white-space: nowrap; }
.site-nav a:hover { background: rgb(255 255 255 / 12%); }
.site-nav a:focus-visible { outline-offset: -5px; }
@media (min-width: 768px) {
  .site-header.is-on-hero:not(:focus-within) .site-header__inner { opacity: 0; }
}
.site-header.is-on-footer { opacity: 0; visibility: hidden; pointer-events: none; }

.anchor { position: absolute; left: 0; width: 1px; height: 1px; }
.anchor--changsha { top: 17.2%; }
.anchor--factory { top: 26.7%; }
.anchor--awakening { top: 36.1%; }
.anchor--variables { top: 71.9%; }
.anchor--profile { top: 81.9%; }
.factory-link { position: absolute; z-index: 2; display: block; border-radius: 12px; }
.factory-link:hover { background: rgb(255 255 255 / 12%); }
.factory-link--rice { left: 4.5%; top: 29.56%; width: 23%; height: 2.46%; }
.factory-link--facilities { left: 40.5%; top: 28.75%; width: 21%; height: 2.16%; }
.factory-link--services { left: 74.4%; top: 29.48%; width: 22%; height: 2.28%; }

/* 原画中的文字先用相近的纸面色盖住，圆点触碰后再显示 HTML 文字。 */
.desktop-annotations { position: absolute; inset: 0; pointer-events: none; }
.annotation .pin { position: absolute; z-index: 2; width: 1.77%; height: .285%; padding: 0; border: 0; border-radius: 50%; background: transparent; pointer-events: auto; }
.annotation .pin:hover { box-shadow: 0 0 0 3px rgb(255 255 255 / 80%); }
.annotation .note { position: absolute; display: flex; align-items: center; padding: .25% .45%; pointer-events: none; }
.note__text { width: 100%; opacity: 0; visibility: hidden; transition: opacity .2s ease; }
.annotation .pin:hover + .note .note__text,
.annotation.is-open .note__text { opacity: 1; visibility: visible; }
.note h2 { margin: 0 0 .4em; color: var(--green); font: normal min(1.667vw, 32px)/1.3 "FZQingKeBenYueSongS-R-GB", "Songti SC", "SimSun", serif; }
.note p { margin: 0; color: var(--green); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-size: min(.833vw, 16px); font-weight: 400; line-height: 1.48; }
.annotation--yuan .pin { left: 54.896%; top: 20.034%; }
.annotation--yuan .note { left: 24.896%; top: 19.288%; width: 18.906%; height: 1.58%; background: linear-gradient(100deg, #e6cb99, #e8cc9b); }
.annotation--museum .pin { left: 70.365%; top: 24.55%; }
.annotation--museum .note { left: 75.938%; top: 25.087%; width: 15%; height: 1.5%; background: linear-gradient(#ead1a4, #efd9ae); }
.mobile-page { display: none; }
.site-nav--mobile { display: none; }

/* 纵向滚动决定横向进度；背景和轨道始终留在同一位置。 */
.rail-journey { position: relative; width: min(100%, 1920px); height: 600svh; margin: auto; background: #f4f5e4; }
.rail-scene { position: sticky; top: 0; height: min(100svh, 56.3vw); overflow: hidden; background: radial-gradient(ellipse at 50% 20%, #fbfbed 0%, #f1f4df 75%, #e6edce 100%); }
/* 轨道、秧盘、标题和说明一起下移，背景仍固定在原处。 */
.rail-content { position: absolute; top: 12%; left: 0; width: 100%; height: 100%; }
.rail-track { position: absolute; z-index: 0; inset: 0; overflow: hidden; }
.rail-track img { display: block; width: 100%; height: 100%; object-fit: fill; }
.rail-slides { position: absolute; z-index: 1; inset: 0 auto 0 0; width: 600%; height: 100%; display: flex; will-change: transform; }
.rail-slide { position: relative; flex: 0 0 16.666667%; height: 100%; }
.rail-plant { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: fill; }
.rail-label { position: absolute; top: 4.8%; left: 42%; min-width: 13%; margin: 0; padding: .2em .55em; border-radius: 100px; background: #9bba72; color: white; font: normal clamp(18px, 2.43vw, 46px)/1.35 "Songti SC", "SimSun", serif; text-align: center; white-space: nowrap; }
.rail-card { position: absolute; top: 12.5%; left: 4.6%; width: 24.3%; height: 44.2%; }
.rail-card > img { position: absolute; inset: 0; width: 100%; height: 100%; }
.rail-card > div { position: relative; height: 100%; padding: 14% 9% 8%; overflow: hidden; }
.rail-card h3 { margin: 0 0 .7em; font: normal clamp(15px, 1.35vw, 26px)/1.4 "Songti SC", "SimSun", serif; }
.rail-card p { margin: 0; color: #8d713d; font-size: clamp(11px, 1.05vw, 20px); line-height: 1.65; }
.rail-slide:first-child .rail-label { left: 44.1%; top: 6.4%; }
.rail-slide:first-child .rail-card { top: 16.8%; height: 40%; }
.post-page { position: relative; width: min(100%, 1920px); aspect-ratio: 1920 / 3385; margin: auto; overflow: hidden; }
.post-page > img { position: absolute; top: 0; left: 0; width: 100%; height: auto; transform: translateY(-71.638%); }
.post-anchor { position: absolute; left: 0; width: 1px; height: 1px; }
.post-anchor--variables { top: 4.16%; }
.post-anchor--profile { top: 37.1%; }
.footer-nav-hotspots { position: absolute; z-index: 4; top: 74.1%; left: 54.1%; width: 13.5%; height: 9.5%; display: grid; grid-template-rows: repeat(4, 1fr); }
.footer-nav-hotspots a { display: block; border-radius: 5px; }
.footer-nav-hotspots a:hover { background: rgb(255 255 255 / 8%); }
.footer-nav-hotspots a:focus-visible { outline-color: #f0c36e; }

/* 生长变量：在高保真画面原位置覆盖真正可拖动的控件。 */
.growth-interaction--desktop { position: absolute; z-index: 5; top: 9.3%; left: 0; width: 100%; height: 27%; pointer-events: none; }
.growth-plant-stage { --plant-scale-x: 1; --plant-scale-y: 1; --plant-rotate: 0deg; --plant-brightness: 1; --plant-saturation: 1; --plant-sepia: 0; --plant-hue: 0deg; position: absolute; z-index: 1; left: 27.1%; top: 19.2%; width: 45.8%; aspect-ratio: 749 / 415; overflow: visible; background: radial-gradient(ellipse at 50% 40%, #f4efdc 0%, #f0ecda 58%, #eeead6 100%); pointer-events: none; }
.growth-plant-stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.growth-plant-layer { z-index: 2; transform-origin: 50% 92%; transform: scaleX(var(--plant-scale-x)) scaleY(var(--plant-scale-y)) rotate(var(--plant-rotate)); filter: brightness(var(--plant-brightness)) saturate(var(--plant-saturation)) sepia(var(--plant-sepia)) hue-rotate(var(--plant-hue)) drop-shadow(0 8px 7px rgb(62 49 22 / 10%)); transition: transform .12s linear, filter .12s linear; will-change: transform, filter; }
.growth-controls { position: absolute; inset: 0; }
.growth-control { --ratio: .6; position: absolute; top: 0; width: 19.22%; height: 19%; margin: 0; background: #f0ecda; pointer-events: auto; }
.growth-control--water { left: 12.03%; --track-a: #d9d9d9; --track-b: #134fae; }
.growth-control--temperature { left: 40.625%; --track-a: #dfd7d7; --track-b: #ef5d63; }
.growth-control--light { left: 69.22%; --track-a: #d9d9d9; --track-b: #d7680f; }
.growth-control__track { position: absolute; top: 43%; left: 0; width: 100%; height: 49%; display: block; }
.growth-control__track::before { content: ""; position: absolute; top: 42%; left: 0; width: 100%; height: 18%; border-radius: 100px; background: linear-gradient(90deg, var(--track-a), var(--track-b)); }
.growth-control input[type="range"] { position: absolute; z-index: 3; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: grab; touch-action: none; }
.growth-control input[type="range"]:active { cursor: grabbing; }
.growth-control input[type="range"]:focus-visible { opacity: .01; outline: 3px solid var(--green); outline-offset: 4px; }
.growth-control__handle { position: absolute; z-index: 2; top: 0; left: calc(var(--ratio) * 100%); width: 19%; height: 100%; overflow: hidden; transform: translateX(-50%); pointer-events: none; will-change: left; }
.growth-control__handle::before { content: ""; position: absolute; top: 0; height: 100%; background-repeat: no-repeat; background-size: 100% 100%; }
.growth-control--water .growth-control__handle { width: 14.6%; overflow: visible; }
.growth-control--water .growth-control__handle::before { left: 0; width: 100%; background-image: url("./images/water-control.svg"); }
.growth-control--temperature .growth-control__handle { width: 13.3%; overflow: visible; }
.growth-control--temperature .growth-control__handle::before { left: 0; width: 100%; background-image: url("./images/temperature-icon.svg"); }
.growth-control--light .growth-control__handle { width: 26%; }
.growth-control--light .growth-control__handle::before { left: 0; width: 100%; background-image: url("./images/light-icon.svg"); }
.growth-control output { position: absolute; z-index: 4; top: 0; left: calc(var(--ratio) * 100%); width: 33.25%; height: 40%; transform: translateX(-50%); color: white; pointer-events: none; }
.growth-control output::before { content: ""; position: absolute; inset: 0; background: center / 100% 100% no-repeat; }
.growth-control--water output::before { background-image: url("./images/water-value-transparent.png"); }
.growth-control--temperature output::before { background-image: url("./images/temperature-value-transparent.png"); }
.growth-control--light output::before { background-image: url("./images/light-value-transparent.png"); }
.growth-control output span { position: absolute; inset: 0 0 18%; display: grid; place-items: center; font: normal min(1.667vw, 32px)/1 "FZQingKeBenYueSongS-R-GB", "Songti SC", serif; }
.growth-feedback { position: absolute; left: 4.01%; top: 71%; width: 32.14%; aspect-ratio: 617 / 125; background: #f0ecda; pointer-events: none; }
.growth-feedback > img { position: absolute; inset: 0; width: 100%; height: 100%; content: url("./images/feedback-frame-transparent.png"); }
.growth-feedback p { position: absolute; top: 43%; left: 23%; width: 73%; margin: 0; color: #769caf; font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-size: min(1.302vw, 25px); line-height: 1.18; white-space: nowrap; }
.growth-feedback strong, .growth-feedback span { display: block; }
.growth-feedback strong { font-weight: 800; }
.growth-feedback span { font-weight: 500; }
.growth-actions { position: absolute; top: 78.2%; left: 71.5%; width: 24.7%; height: 8.2%; display: flex; gap: 8.3%; pointer-events: auto; }
.growth-actions button { flex: 1 1 0; padding: 0; border: 0; border-radius: 100px; background: transparent; color: transparent; }
.growth-actions button:focus-visible { outline-color: white; background: rgb(255 255 255 / 18%); }

.growth-card-result { position: fixed; z-index: 40; inset: 0; display: grid; place-items: center; padding: 24px; border: 0; background: rgb(45 38 22 / 44%); opacity: 0; transition: opacity .28s ease; }
.growth-card-result.is-visible { opacity: 1; }
.growth-card-result img { display: block; width: min(30vw, 420px); max-height: 78vh; object-fit: contain; filter: brightness(1.06) drop-shadow(0 22px 30px rgb(30 22 8 / 35%)); transform: translateY(38px) scale(.86); transition: transform .62s cubic-bezier(.18,.8,.2,1); }
.growth-card-result.is-visible img { transform: translateY(0) scale(1); }
.growth-card-result.is-storing img { transform: translateY(95vh) scale(.35); transition: transform .62s cubic-bezier(.55,0,.9,.42); }

/* 档案区只覆盖长图中对应的一屏，其余画面和滚动轨道保持原位。 */
.profile-stage { position: absolute; top: 36.1%; left: 0; width: 100%; height: 31.14%; overflow: visible; background: linear-gradient(#f4ecd9 0%, #f3e7cb 58%, #ead4ae 100%); }
.profile-stage h2 { position: absolute; top: 0; left: 5.1%; margin: 0; font: normal clamp(24px, 3.125vw, 60px)/1.3 "Songti SC", "SimSun", serif; }
.profile-stage__subhead { position: absolute; top: 10%; left: 5.1%; margin: 0; color: #95681c; font: normal clamp(14px, 1.55vw, 30px)/1.3 "Songti SC", "SimSun", serif; }
.profile-stage__plant { position: absolute; top: 16.5%; left: 15.2%; width: 23%; height: 62.6%; object-fit: contain; }
.profile-stage__criteria { position: absolute; top: 28%; left: 4.8%; width: 10%; height: 47%; display: flex; flex-direction: column; justify-content: space-between; color: #95681c; font: normal clamp(11px, 1.05vw, 20px)/1.3 "Songti SC", "SimSun", serif; text-align: right; }
.profile-stage .album-mount { position: absolute; top: 19.6%; left: 37.4%; width: 59.3%; aspect-ratio: 1672 / 941; }
.album-book { position: relative; width: 100%; height: 100%; perspective: 2600px; }
.album-model { position: absolute; z-index: 0; inset: 0; transform: translate3d(-25%,0,0) scale(.92); transform-origin: center center; transform-style: preserve-3d; will-change: transform; }
.album-model__right { position: absolute; inset: 0 0 0 50%; display: block; width: 50%; height: 100%; object-fit: fill; pointer-events: none; filter: drop-shadow(8px 13px 8px rgb(64 45 13 / 18%)); }
.album-leaf { position: absolute; z-index: 2; top: 0; left: 50%; width: 50%; height: 100%; transform: rotateY(0deg); transform-origin: left center; transform-style: preserve-3d; will-change: transform, filter; }
.album-leaf__face { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: fill; backface-visibility: hidden; -webkit-backface-visibility: hidden; transform-style: preserve-3d; pointer-events: none; }
.album-leaf__front { transform: rotateY(0.01deg) translateZ(.5px); filter: drop-shadow(9px 13px 10px rgb(54 39 15 / 28%)); }
.album-leaf__back { opacity: 0; backface-visibility: visible; -webkit-backface-visibility: visible; transform: scaleX(-1) translateZ(-.5px); filter: drop-shadow(-9px 13px 10px rgb(54 39 15 / 20%)); }
.album-open-trigger { position: absolute; z-index: 2; inset: 4% 18%; width: 64%; height: 92%; padding: 0; border: 0; background: transparent; color: transparent; }
.album-book[data-state="open"] .album-open-trigger { display: none; }
.album-card { position: absolute; z-index: 4; display: block; padding: 0; border: 0; border-radius: 2px; background: #faf7ef; cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(7%) scale(.96); box-shadow: 1px 2px 5px rgb(43 29 6 / 20%); transition: opacity .42s ease, transform .42s ease, visibility 0s .42s, filter .45s ease; will-change: transform, opacity, filter; }
.album-card.is-visible { opacity: 1; visibility: visible; transform: translateY(0) scale(1); transition-delay: calc(var(--order) * 105ms), calc(var(--order) * 105ms), 0s; }
.album-card img { display: block; width: 100%; height: 100%; object-fit: fill; }
.album-card:hover { box-shadow: 2px 4px 14px rgb(43 29 6 / 27%); }
.album-book.is-background .album-model,
.album-book.is-background .album-card { filter: brightness(.66) saturate(.72); }
.album-book.is-background::after { content: ""; position: absolute; z-index: 3; inset: 3% 2%; border-radius: 4%; background: rgb(70 56 30 / 13%); pointer-events: none; animation: album-dim .42s ease both; }
.card-flight { position: fixed; z-index: 12; display: block; padding: 0; border: 0; background: transparent; transform-origin: top left; cursor: pointer; pointer-events: auto; filter: brightness(1.08) contrast(1.035) drop-shadow(0 4px 3px rgb(52 39 17 / 18%)) drop-shadow(0 22px 25px rgb(36 31 14 / 40%)); will-change: transform, filter; }
.card-flight__spin { position: absolute; inset: 0; transform-style: preserve-3d; }
.card-flight__face { position: absolute; inset: 0; display: block; width: 100%; height: 100%; backface-visibility: hidden; object-fit: fill; }
.card-flight__face--back { transform: rotateY(180deg); }
@keyframes album-dim { from { opacity: 0; } to { opacity: 1; } }

@media (max-width: 767px) {
  .site-nav--desktop { display: none; }
  .site-nav--mobile { display: flex; }
  .site-header { top: 8px; }
  .site-header__inner { width: min(calc(100% - 16px), 520px); height: clamp(40px, 11.5vw, 48px); }
  .site-nav { inset: 0 10px; }
  .site-nav a { font-size: clamp(11px, 3.35vw, 17px); }
  .design-page { width: 100%; aspect-ratio: auto; overflow: visible; padding-top: 0; }
  .fog-journey, .design-page__canvas, .rail-journey, .post-page { display: none; }
  .mobile-page { display: block; }
  .mobile-page section { scroll-margin-top: 88px; }
  .mobile-hero { display: flex; align-items: flex-end; min-height: min(82svh, 680px); padding: 32px 7vw 48px; background: #d4b371 url("https://res.cloudinary.com/mwsa3enq/image/upload/hero-bg.png") center / cover no-repeat; }
  .mobile-hero__copy { width: 100%; padding: 24px 20px; background: rgb(246 229 188 / 83%); }
  .mobile-hero h1 { margin: 5px 0 10px; font: normal clamp(42px, 12vw, 68px)/1.12 "Songti SC", "SimSun", serif; }
  .mobile-hero p:not(.eyebrow) { margin: 0 0 18px; line-height: 1.7; }
  .mobile-hero .mobile-fog-start, .text-link { display: inline-flex; gap: 12px; align-items: center; padding: 10px 15px; border: 0; border-radius: 100px; background: var(--green); color: white; text-decoration: none; }
  .mobile-fog { display: block; position: fixed; z-index: 9; inset: 0; visibility: hidden; overflow: hidden; pointer-events: none; }
  .mobile-fog.is-active { visibility: visible; pointer-events: auto; }
  .mobile-fog > img { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: cover; opacity: 0; }
  .mobile-fog__rise { transform: translateY(22%); }
  .mobile-fog.is-filling .mobile-fog__rise { opacity: 1; transform: translateY(0); transition: opacity .7s ease, transform 1.1s ease-out; }
  .mobile-fog.is-filling .mobile-fog__cover, .mobile-fog.is-covered .mobile-fog__cover { opacity: 1; transition: opacity .55s ease .55s; }
  .mobile-fog.is-covered .mobile-fog__rise { opacity: 0; }
  .mobile-fog.is-opening .mobile-fog__cover { opacity: 0; transition: opacity 1.5s ease-out; }
  .mobile-fog.is-opening .mobile-fog__open { animation: fog-scatter 2.1s ease-out both; }
  .mobile-fog__next { position: absolute; z-index: 1; left: 50%; bottom: 16%; transform: translateX(-50%); min-width: 210px; padding: 12px 20px; border: 1px solid #94724c; border-radius: 30px; background: rgb(255 249 231 / 88%); color: var(--ink); opacity: 0; pointer-events: none; }
  .mobile-fog.is-covered .mobile-fog__next { opacity: 1; pointer-events: auto; }
  @keyframes fog-scatter { 0% { opacity: 0; transform: scale(1); } 25% { opacity: 1; } 70% { opacity: .85; } 100% { opacity: 0; transform: scale(1.13); } }
  .eyebrow { margin: 0 0 10px; color: #8f7140; font-size: 12px; letter-spacing: .1em; }
  .mobile-section { padding: 62px 6vw 68px; border-bottom: 1px solid rgb(78 63 7 / 18%); }
  .mobile-section:nth-of-type(odd) { background: #f8edcf; }
  .mobile-section h2 { margin: 0 0 20px; font: normal clamp(28px, 8vw, 42px)/1.3 "Songti SC", "SimSun", serif; }
  .mobile-section h3 { margin: 0 0 12px; font: normal 23px/1.35 "Songti SC", "SimSun", serif; }
  .section-lead { max-width: 58ch; margin: 16px 0 24px; line-height: 1.85; }
  .mobile-map, .factory-illustration, .mobile-process { display: block; width: 100%; height: auto; }
  .mobile-map { margin: 12px 0 24px; }
  .mobile-stories, .factory-grid, .step-list { display: grid; gap: 18px; }
  .story { display: grid; grid-template-columns: minmax(0, 1fr); overflow: hidden; background: #f4e1b7; border: 1px solid rgb(78 63 7 / 12%); }
  .story > img { display: block; width: 100%; height: 190px; object-fit: cover; }
  .story__body { padding: 19px; }
  .mobile-pin { display: inline-flex; align-items: center; gap: 8px; padding: 5px 0; border: 0; background: transparent; color: #7b6336; font-size: 13px; }
  .mobile-pin span { font-size: 24px; line-height: 1; }
  .mobile-note { display: none; margin: 12px 0 0; padding: 13px 15px; border-left: 2px solid var(--gold); background: rgb(255 255 255 / 45%); font-size: 14px; line-height: 1.8; }
  .mobile-note.is-open { display: block; }
  .factory-illustration { margin: 12px 0 5px; }
  .factory-grid a { display: block; overflow: hidden; background: #f5e4c0; text-decoration: none; border: 1px solid rgb(78 63 7 / 15%); }
  .factory-grid img { display: block; width: 100%; height: 160px; object-fit: cover; }
  .factory-grid span { display: flex; justify-content: space-between; padding: 14px 16px; font-family: "Songti SC", "SimSun", serif; font-size: 19px; }
  .step-list article { display: grid; grid-template-columns: 45px minmax(0, 1fr); gap: 12px; padding: 18px 0; border-top: 1px solid rgb(78 63 7 / 20%); }
  .step-number { color: var(--gold); font-size: 20px; }
  .step-list p { margin: 0; line-height: 1.7; }
  .mobile-process { margin: 8px 0 0; }
  #mobile-variables > .growth-source-image { display: none; }
  .growth-interaction--mobile { position: relative; margin-top: 20px; padding: 22px 16px; border: 1px solid rgb(78 63 7 / 14%); background: rgb(255 255 255 / 36%); }
  .growth-interaction--mobile .growth-plant-stage { position: relative; left: auto; top: auto; width: 100%; margin: 0 0 20px; background: #f0ecda; }
  .growth-interaction--mobile .growth-controls { position: relative; inset: auto; display: grid; gap: 22px; }
  .growth-interaction--mobile .growth-control { position: relative; top: auto; left: auto; width: 100%; height: 112px; background: transparent; }
  .growth-interaction--mobile .growth-control__name { position: absolute; top: 0; left: 0; color: var(--ink); font: normal 18px/1.2 "Songti SC", serif; }
  .growth-interaction--mobile .growth-control output { top: 0; width: 92px; height: 48px; }
  .growth-interaction--mobile .growth-control output span { bottom: 14%; font-size: 16px; }
  .growth-interaction--mobile .growth-control__track { top: 44px; height: 68px; }
  .growth-interaction--mobile .growth-control__track::before { top: 45%; height: 12px; }
  .growth-interaction--mobile .growth-feedback { position: relative; top: auto; left: auto; width: 100%; margin-top: 18px; }
  .growth-interaction--mobile .growth-feedback p { font-size: clamp(11px, 3vw, 14px); }
  .growth-interaction--mobile .growth-actions { position: relative; top: auto; left: auto; width: 100%; height: 46px; margin-top: 18px; gap: 10px; }
  .growth-interaction--mobile .growth-actions button { background: var(--green); color: white; font-size: 14px; }
  .growth-interaction--mobile .growth-actions button + button { background: var(--gold); }
  .growth-interaction--desktop { display: none; }
  .growth-card-result img { width: min(78vw, 340px); }
  .mobile-rail-list { display: grid; gap: 24px; margin-top: 28px; }
  .mobile-rail-list article { padding: 12px 16px 20px; border: 1px solid rgb(78 63 7 / 14%); background: #f8efd9; }
  .mobile-rail-list img { display: block; width: 100%; height: auto; }
  .mobile-rail-list h3 { margin: 0 0 8px; }
  .mobile-rail-list p { margin: 0; line-height: 1.7; }
  .profile-grid { display: grid; grid-template-columns: minmax(0, 1fr); }
  .profile-grid img { display: block; width: min(100%, 330px); margin: auto; }
  .profile-grid p { line-height: 1.8; }
  .profile-stage { display: none; }
  #mobile-profile .album-mount { position: relative; width: 100%; aspect-ratio: 1672 / 941; margin: 28px auto 0; }
  #mobile-profile .album-card { box-shadow: 0 1px 3px rgb(43 29 6 / 28%); }
  .footer-nav-hotspots { display: none; }
  .mobile-footer { padding: 30px 6vw; background: var(--green); color: white; font-size: 13px; }
  .mobile-footer strong { display: block; margin-bottom: 18px; font-weight: 500; }
  .mobile-footer nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .mobile-footer a { padding: 10px 12px; border: 1px solid rgb(255 255 255 / 38%); color: white; text-decoration: none; }
}
@media (min-width: 600px) and (max-width: 767px) {
  .mobile-stories, .factory-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .note__text { transition: none; }
}

/* ================================================================
   无 JavaScript 版本：所有状态由 HTML 表单控件与 CSS 选择器控制
   ================================================================ */
.css-switch,
.pin-toggle,
.growth-state,
.growth-finish,
.album-open-state,
.album-card-choice { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* 桌面圆点：悬停或勾选都显示说明。 */
.annotation .pin-toggle:checked + .pin + .note .note__text { opacity: 1; visibility: visible; }
.annotation .pin { display: block; cursor: pointer; }

/* 纯 CSS 滚动动画：云雾与横向育秧轨道。 */
.fog-journey { view-timeline-name: --fog-journey; view-timeline-axis: block; }
.fog-frame--rise { animation: css-fog-rise linear both; animation-timeline: --fog-journey; animation-range: cover 0% cover 55%; }
.fog-frame--cover { animation: css-fog-cover linear both; animation-timeline: --fog-journey; animation-range: cover 15% cover 78%; }
.fog-frame--open { animation: css-fog-open linear both; animation-timeline: --fog-journey; animation-range: cover 35% cover 100%; }
.fog-backdrop--map { animation: css-map-reveal linear both; animation-timeline: --fog-journey; animation-range: cover 30% cover 72%; }
@keyframes css-fog-rise { 0%, 10% { opacity: 0; transform: translateY(30%); } 42%, 68% { opacity: 1; transform: translateY(0); } 100% { opacity: 0; transform: translateY(-4%); } }
@keyframes css-fog-cover { 0%, 22% { opacity: 0; } 48%, 72% { opacity: 1; } 100% { opacity: 0; } }
@keyframes css-fog-open { 0%, 25% { opacity: 0; transform: scale(1.02); } 48%, 72% { opacity: 1; } 100% { opacity: 0; transform: scale(1.2); } }
@keyframes css-map-reveal { 0%, 45% { opacity: 0; } 64%, 100% { opacity: 1; } }

.rail-journey { view-timeline-name: --rail-journey; view-timeline-axis: block; }
.rail-slides { animation: css-rail-move linear both; animation-timeline: --rail-journey; animation-range: cover 0% cover 100%; }
@keyframes css-rail-move { from { transform: translate3d(0,0,0); } to { transform: translate3d(-83.333333%,0,0); } }

/* 悬浮导航根据整个页面滚动进度出现，并在页尾淡出。 */
.site-header { animation: css-header-visibility linear both; animation-timeline: scroll(root block); }
@keyframes css-header-visibility { 0%, 7% { opacity: 0; visibility: hidden; } 10%, 89% { opacity: 1; visibility: visible; } 94%, 100% { opacity: 0; visibility: hidden; } }

/* 生长变量：七个互斥状态代替需要脚本读取数值的连续滑杆。 */
.growth-css { border: 0; padding: 0; }
.growth-css .growth-ui { position: absolute; inset: 0; }
.growth-css .growth-control { padding: 0; border: 0; }
.growth-css .growth-control__track label { position: relative; z-index: 6; display: block; flex: 1 1 0; height: 100%; overflow: hidden; color: transparent; cursor: pointer; }
.growth-css .growth-control__track { display: flex; }
.growth-css .growth-control output span { display: none; }
.growth-css .growth-control output .value-default { display: grid; }
.growth-css:has(.state-water-low:checked) .growth-control--water { --ratio: .08; }
.growth-css:has(.state-water-high:checked) .growth-control--water { --ratio: .92; }
.growth-css:has(.state-temp-low:checked) .growth-control--temperature { --ratio: .08; }
.growth-css:has(.state-temp-high:checked) .growth-control--temperature { --ratio: .92; }
.growth-css:has(.state-light-low:checked) .growth-control--light { --ratio: .08; }
.growth-css:has(.state-light-high:checked) .growth-control--light { --ratio: .92; }
.growth-css:has(.state-water-low:checked) .growth-control--water .value-default,
.growth-css:has(.state-water-high:checked) .growth-control--water .value-default,
.growth-css:has(.state-temp-low:checked) .growth-control--temperature .value-default,
.growth-css:has(.state-temp-high:checked) .growth-control--temperature .value-default,
.growth-css:has(.state-light-low:checked) .growth-control--light .value-default,
.growth-css:has(.state-light-high:checked) .growth-control--light .value-default { display: none; }
.growth-css:has(.state-water-low:checked) .growth-control--water .value-low,
.growth-css:has(.state-temp-low:checked) .growth-control--temperature .value-low,
.growth-css:has(.state-light-low:checked) .growth-control--light .value-low,
.growth-css:has(.state-water-high:checked) .growth-control--water .value-high,
.growth-css:has(.state-temp-high:checked) .growth-control--temperature .value-high,
.growth-css:has(.state-light-high:checked) .growth-control--light .value-high { display: grid; }

.growth-css .growth-feedback p { display: none; }
.growth-css:has(.state-healthy:checked) .feedback-healthy,
.growth-css:has(.state-water-low:checked) .feedback-water-low,
.growth-css:has(.state-water-high:checked) .feedback-water-high,
.growth-css:has(.state-temp-low:checked) .feedback-temp-low,
.growth-css:has(.state-temp-high:checked) .feedback-temp-high,
.growth-css:has(.state-light-low:checked) .feedback-light-low,
.growth-css:has(.state-light-high:checked) .feedback-light-high { display: block; }

.growth-css:has(.state-water-low:checked) .growth-plant-layer { transform: scaleX(.96) scaleY(.83) rotate(1.1deg); filter: brightness(.88) saturate(.58) sepia(.24) hue-rotate(-7deg) drop-shadow(0 8px 7px rgb(62 49 22 / 10%)); }
.growth-css:has(.state-water-high:checked) .growth-plant-layer { transform: scaleX(1.018) scaleY(.9) rotate(-.6deg); filter: brightness(.8) saturate(.52) sepia(.1) hue-rotate(12deg) drop-shadow(0 8px 7px rgb(62 49 22 / 10%)); }
.growth-css:has(.state-temp-low:checked) .growth-plant-layer { transform: scaleX(.96) scaleY(.86) rotate(-.6deg); filter: brightness(.86) saturate(.66) hue-rotate(-14deg) drop-shadow(0 8px 7px rgb(62 49 22 / 10%)); }
.growth-css:has(.state-temp-high:checked) .growth-plant-layer { transform: scaleX(.94) scaleY(.79) rotate(1.1deg); filter: brightness(.91) saturate(.54) sepia(.3) hue-rotate(-9deg) drop-shadow(0 8px 7px rgb(62 49 22 / 10%)); }
.growth-css:has(.state-light-low:checked) .growth-plant-layer { transform: scaleX(.9) scaleY(1.12); filter: brightness(1.07) saturate(.48) hue-rotate(8deg) drop-shadow(0 8px 7px rgb(62 49 22 / 10%)); }
.growth-css:has(.state-light-high:checked) .growth-plant-layer { transform: scaleX(.965) scaleY(.89) rotate(-.7deg); filter: brightness(1.02) saturate(.64) sepia(.38) hue-rotate(-12deg) drop-shadow(0 8px 7px rgb(62 49 22 / 10%)); }
.growth-css .growth-plant-layer { transition: transform .55s cubic-bezier(.22,.7,.2,1), filter .55s ease; }

.growth-actions .growth-complete,
.growth-actions button { display: grid; place-items: center; flex: 1 1 0; padding: 0; border: 0; border-radius: 100px; background: transparent; color: transparent; cursor: pointer; }
.growth-card-result-css { position: fixed; z-index: 40; inset: 0; display: grid; place-items: center; padding: 24px; background: rgb(45 38 22 / 44%); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .28s ease, visibility 0s .28s; cursor: pointer; }
.growth-card-result-css img { display: none; width: min(30vw, 420px); max-height: 78vh; object-fit: contain; filter: brightness(1.06) drop-shadow(0 22px 30px rgb(30 22 8 / 35%)); transform: translateY(38px) scale(.86); transition: transform .62s cubic-bezier(.18,.8,.2,1); }
.growth-css:has(.growth-finish:checked) .growth-card-result-css { opacity: 1; visibility: visible; pointer-events: auto; transition-delay: 0s; }
.growth-css:has(.growth-finish:checked) .growth-card-result-css img { transform: translateY(0) scale(1); }
.growth-css:has(.state-healthy:checked) .result-healthy,
.growth-css:has(.state-water-low:checked) .result-water-low,
.growth-css:has(.state-water-high:checked) .result-water-high,
.growth-css:has(.state-temp-low:checked) .result-temp-low,
.growth-css:has(.state-temp-high:checked) .result-temp-high,
.growth-css:has(.state-light-low:checked) .result-light-low,
.growth-css:has(.state-light-high:checked) .result-light-high { display: block; }

/* 卡册：复选框负责开册，单选框负责七张卡的抽出与归位。 */
.album-css .album-open-trigger,
.album-css .album-card { cursor: pointer; }
.album-css .album-open-state:checked ~ .album-book .album-model { transform: translate3d(0,0,0) scale(1); transition: transform 1.35s cubic-bezier(.55,.02,.2,1); }
.album-css .album-open-state:checked ~ .album-book .album-leaf { transform: rotateY(-180deg); transition: transform 1.55s cubic-bezier(.55,.02,.18,1); }
.album-css .album-open-state:checked ~ .album-book .album-leaf__front { opacity: 0; transition: opacity 0s .78s; }
.album-css .album-open-state:checked ~ .album-book .album-leaf__back { opacity: 1; transition: opacity 0s .78s; }
.album-css .album-open-state:checked ~ .album-book .album-open-trigger { display: none; }
.album-css .album-open-state:checked ~ .album-book .album-card { opacity: 1; visibility: visible; transform: translateY(0) scale(1); transition: opacity .42s ease .95s, transform .42s ease .95s, visibility 0s .95s; }
.album-preview { position: fixed; z-index: 45; inset: 0; display: grid; place-items: center; padding: 8vh 20px; background: rgb(43 35 20 / 38%); opacity: 0; visibility: hidden; pointer-events: none; cursor: pointer; transition: opacity .35s ease, visibility 0s .35s; }
.album-preview img { display: none; width: min(33vw, 460px); max-height: 78vh; object-fit: contain; filter: brightness(1.08) contrast(1.035) drop-shadow(0 22px 25px rgb(36 31 14 / 40%)); transform: translateY(50px) scale(.72) rotateY(70deg); transition: transform .72s cubic-bezier(.2,.72,.22,1); }
.album-css:has(.album-card-choice:not(.card-none):checked) .album-preview { opacity: 1; visibility: visible; pointer-events: auto; transition-delay: 0s; }
.album-css:has(.album-card-choice:not(.card-none):checked) .album-preview img { transform: translateY(0) scale(1) rotateY(0); }
.album-css:has(.choice-1:checked) .preview-1,
.album-css:has(.choice-2:checked) .preview-2,
.album-css:has(.choice-3:checked) .preview-3,
.album-css:has(.choice-4:checked) .preview-4,
.album-css:has(.choice-5:checked) .preview-5,
.album-css:has(.choice-6:checked) .preview-6,
.album-css:has(.choice-7:checked) .preview-7 { display: block; }
.album-css:has(.album-card-choice:not(.card-none):checked) .album-book { filter: brightness(.68) saturate(.72); transition: filter .35s ease; }

/* 手机端点击云雾与说明。 */
.mobile-story-note summary { display: inline-flex; align-items: center; gap: 8px; padding: 5px 0; color: #7b6336; font-size: 13px; cursor: pointer; list-style: none; }
.mobile-story-note summary::-webkit-details-marker { display: none; }
.mobile-story-note summary span { font-size: 24px; line-height: 1; }
.mobile-story-note p { margin: 12px 0 0; padding: 13px 15px; border-left: 2px solid var(--gold); background: rgb(255 255 255 / 45%); font-size: 14px; line-height: 1.8; }

@media (max-width: 767px) {
  .site-header { animation: none; opacity: 1; visibility: visible; }
  .css-switch--fog:checked ~ .mobile-fog { visibility: visible; pointer-events: auto; }
  .css-switch--fog:checked ~ .mobile-fog .mobile-fog__rise { animation: css-mobile-rise 1.15s ease-out both; }
  .css-switch--fog:checked ~ .mobile-fog .mobile-fog__cover { animation: css-mobile-cover 1.1s ease .65s both; }
  .css-switch--fog:checked ~ .mobile-fog .mobile-fog__next { animation: css-mobile-next .35s ease 1.55s both; pointer-events: auto; }
  body:has(#mobile-changsha:target) .mobile-fog { animation: css-mobile-fog-leave 2.1s ease-out both; pointer-events: none; }
  body:has(#mobile-changsha:target) .mobile-fog__open { animation: fog-scatter 2.1s ease-out both; }
  @keyframes css-mobile-rise { from { opacity: 0; transform: translateY(22%); } to { opacity: 1; transform: translateY(0); } }
  @keyframes css-mobile-cover { from { opacity: 0; } to { opacity: 1; } }
  @keyframes css-mobile-next { from { opacity: 0; transform: translate(-50%,12px); } to { opacity: 1; transform: translate(-50%,0); } }
  @keyframes css-mobile-fog-leave { 0%, 70% { visibility: visible; opacity: 1; } 100% { visibility: hidden; opacity: 0; } }
  .mobile-fog__next { text-decoration: none; text-align: center; }
  .growth-css .growth-ui { position: relative; inset: auto; }
  .growth-interaction--mobile .growth-controls { margin-top: 8px; }
  .growth-interaction--mobile .growth-control { display: block; }
  .growth-interaction--mobile .growth-control__track label { min-width: 0; }
  .growth-interaction--mobile .growth-actions .growth-complete,
  .growth-interaction--mobile .growth-actions button { background: var(--green); color: white; font-size: 14px; }
  .growth-interaction--mobile .growth-actions button { background: var(--gold); }
  .growth-card-result-css img,
  .album-preview img { width: min(78vw, 340px); }
}

@media (prefers-reduced-motion: reduce) {
  .fog-frame, .fog-backdrop--map, .rail-slides, .site-header { animation: none; }
  .album-css *, .growth-css * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}