:root {
  color-scheme: light;
  --page: #fbf6f3;
  --paper: #fffcfa;
  --ink: #352b36;
  --muted: #6d5f6b;
  --line: #e9dce3;
  --rose-ink: #823c63;
  --night: #2c2034;
  --body: "PingFang SC", "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --ease-out: cubic-bezier(.2,.68,.22,1);
  font-family: var(--body);
  color: var(--ink);
  background: var(--page);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body { margin: 0; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
a, summary { -webkit-tap-highlight-color: transparent; }
:where(a, summary, [tabindex]):focus-visible { outline: 2px solid var(--rose-ink); outline-offset: 5px; }
[hidden] { display: none !important; }
p, h1, h2, h3, figure { margin: 0; }
.shell { width: min(1200px, calc(100% - 112px)); margin-inline: auto; }
.skip { position: fixed; z-index: 10; top: 8px; left: 8px; padding: 10px 14px; background: var(--paper); transform: translateY(-150%); }
.skip:focus { transform: none; }

.header {
  position: sticky;
  z-index: 4;
  top: 0;
  background: rgb(251 246 243 / 89%);
  backdrop-filter: blur(14px);
}
.header-inner {
  min-height: 75px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.header-inner > .button { justify-self: end; }
.brand { display: inline-flex; width: fit-content; align-items: center; gap: 9px; font-weight: 650; font-size: 21px; letter-spacing: -.045em; white-space: nowrap; }
.brand img { width: 33px; height: auto; flex: 0 0 auto; }
.header nav, .footer nav { display: flex; gap: 29px; align-items: center; font-size: 13px; color: var(--muted); }
.header nav a, .footer nav a { padding-block: 7px; transition: color .2s; }
.header nav a:hover, .footer nav a:hover { color: var(--rose-ink); }
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 11px;
  min-height: 48px;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--night);
  color: #fff8fb;
  font-size: 14px;
  line-height: 1.4;
  font-weight: 600;
  white-space: nowrap;
  transition: background .2s, transform .25s var(--ease-out);
}
.button:hover { background: #50304e; transform: translateY(-2px); }
.button-small { min-height: 38px; padding: 8px 15px; font-size: 12px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; padding-block: 8px; font-size: 14px; color: var(--muted); transition: color .2s; }
.text-link:hover { color: var(--rose-ink); }
.text-link span { transition: translate .25s var(--ease-out); }
.text-link:hover span { translate: 0 3px; }

.hero { display: grid; grid-template-columns: 1.07fr 1fr; align-items: center; gap: clamp(28px, 5vw, 80px); padding-block: clamp(45px, 6vw, 91px) clamp(65px, 9vw, 136px); }
.eyebrow { color: var(--rose-ink); font-size: 13px; font-weight: 560; }
h1, h2, h3 { text-wrap: balance; }
h1 { margin-block: 19px 18px; font-size: clamp(36px, 4.18vw, 61px); font-weight: 610; line-height: 1.17; letter-spacing: -.077em; }
h1 br { display: block; }
h2 { font-size: clamp(32px, 3.62vw, 50px); font-weight: 610; line-height: 1.23; letter-spacing: -.067em; }
.hero-description { max-width: 33em; color: var(--muted); font-size: clamp(14px, 1.25vw, 17px); line-height: 1.85; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 22px; margin-top: 28px; }
.hero-art {
  isolation: isolate;
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1.11;
  overflow: hidden;
  border-radius: 20px;
  background: #f2e5ee;
}
.hero-light {
  position: absolute;
  z-index: -1;
  inset: -16%;
  background:
    radial-gradient(ellipse at 43% 40%, #fff9f6, transparent 47%),
    radial-gradient(ellipse at 13% 72%, #f3bfd2, transparent 55%),
    radial-gradient(ellipse at 83% 28%, #d8c5eb, transparent 56%),
    linear-gradient(156deg, #e1d4ec, #f3e5ed 50%, #dfcbe7);
}
.hero-mark { width: 63%; }
.hero-mark img { width: 100%; height: auto; filter: drop-shadow(0 16px 25px rgb(106 66 121 / 16%)); }
[data-depth] { transform: translate3d(0, var(--drift, 0px), 0); }
.motion-ready .hero-copy > * { animation: enter .85s var(--ease-out) both; }
.motion-ready .hero-copy h1 { animation-delay: .08s; }
.motion-ready .hero-description { animation-delay: .16s; }
.motion-ready .actions { animation-delay: .23s; }
.motion-ready .hero-mark img { animation: settle 1.15s .06s var(--ease-out) both; }
@keyframes enter { from { opacity: 0; translate: 0 13px; } to { opacity: 1; translate: 0 0; } }
@keyframes settle { from { opacity: 0; scale: .91; translate: 0 16px; } to { opacity: 1; scale: 1; translate: 0 0; } }

.case-section { border-top: 1px solid var(--line); padding-top: clamp(49px, 6.4vw, 91px); }
.section-intro { margin-bottom: clamp(23px, 3vw, 38px); }
.section-intro h2, .memory-copy h2, .faq h2 { margin-top: 12px; }
.case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(15px, 1.75vw, 24px); }
.case { min-width: 0; }
.case-visual {
  isolation: isolate;
  position: relative;
  display: flex;
  align-items: end;
  width: 100%;
  min-height: 310px;
  aspect-ratio: .88;
  padding: clamp(12px, 1.35vw, 19px);
  overflow: hidden;
  border-radius: 17px;
  background: #e3d1df;
}
.case-photo { position: absolute; z-index: -2; inset: -34px 0; width: 100%; height: calc(100% + 68px); object-fit: cover; }
.clay-photo { object-position: 28% 50%; }
.study-photo { object-position: 37% 50%; }
.desk-photo { object-position: 69% 50%; }
.case-visual::after { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(180deg, transparent 35%, rgb(48 30 45 / 24%)); }
.case-result, .memory-answer {
  width: 100%;
  padding: clamp(13px, 1.4vw, 19px);
  border: 1px solid rgb(255 255 255 / 85%);
  border-radius: 12px;
  background: rgb(255 251 249 / 94%);
  box-shadow: 0 9px 22px rgb(57 34 53 / 11%);
}
.result-label { color: var(--rose-ink); font-size: 11px; font-weight: 570; line-height: 1.5; }
.result-title { margin-block: 5px 6px; font-size: clamp(16px, 1.44vw, 20px); font-weight: 620; letter-spacing: -.035em; line-height: 1.42; }
.case-result > p:last-child, .memory-answer > p:last-child, .result-steps { color: #544752; font-size: 13px; line-height: 1.65; }
.result-steps { display: grid; gap: 3px; margin: 0; padding: 0; list-style: none; }
.result-steps span { display: inline-block; width: 2.8em; color: var(--rose-ink); }
.result-steps.numbered { list-style: decimal; padding-left: 1.4em; }
.result-steps.numbered li::marker { color: var(--rose-ink); }
.case h3 { margin-top: 16px; font-size: clamp(17px, 1.55vw, 22px); font-weight: 610; line-height: 1.4; letter-spacing: -.045em; text-wrap: pretty; }
.case > p { margin-top: 6px; max-width: 28em; font-size: 14px; color: var(--muted); line-height: 1.75; }

.memory-section { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: clamp(29px, 8vw, 115px); padding-block: clamp(75px, 11vw, 152px); }
.memory-copy > p:last-child { max-width: 24em; margin-top: 14px; color: var(--muted); font-size: 15px; line-height: 1.85; }
.memory-board {
  min-width: 0;
  display: grid;
  gap: 10px;
  overflow: hidden;
  padding: clamp(24px, 4.4vw, 62px);
  border-radius: 17px;
  background: radial-gradient(ellipse at 91% 10%, #e7d7ed, transparent 72%), #f3e4eb;
}
.memory-question { justify-self: end; max-width: 95%; padding: 11px 14px; border-radius: 12px 12px 3px 12px; background: #eed9e6; font-size: 13px; line-height: 1.5; }
.memory-answer { justify-self: start; width: min(92%, 345px); }
.memory-answer .result-label { display: flex; align-items: center; gap: 6px; }

.faq { display: grid; grid-template-columns: .76fr 1.24fr; gap: 36px; padding-block: 51px 70px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; justify-content: space-between; gap: 12px; cursor: pointer; padding-block: 17px; list-style: none; font-size: 15px; font-weight: 550; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--rose-ink); font-size: 18px; line-height: 1.2; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); font-size: 14px; line-height: 1.85; padding-bottom: 15px; }
.faq details a { text-decoration: underline; text-underline-offset: 3px; }

.download-panel {
  display: grid;
  justify-items: center;
  text-align: center;
  padding: 54px 24px 57px;
  border-radius: 18px;
  background: radial-gradient(ellipse at 20% 0%, #fbe9ed, transparent 65%), radial-gradient(ellipse at 85% 4%, #e5d9f3, transparent 70%), #f5e7f0;
}
.download-panel img { object-fit: contain; }
.download-panel h2 { margin-top: 17px; }
.download-panel > p { margin-top: 12px; font-size: 14px; color: var(--muted); }
#download-options:not(:empty) { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 21px; }
.download-panel .download-status { margin-top: 19px; font-size: 12px; }
.footer { min-height: 90px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 22px; color: var(--muted); font-size: 12px; }
.footer .brand { font-size: 17px; color: var(--ink); }
.footer .brand img { width: 24px; }
.footer nav { gap: 19px; font-size: 12px; flex-wrap: wrap; }

.motion-ready .will-reveal {
  opacity: 0;
  translate: 0 17px;
  transition: opacity .7s var(--ease-out), translate .7s var(--ease-out);
}
.motion-ready .will-reveal:is(.is-visible, :focus-within) { opacity: 1; translate: 0 0; }
.motion-ready .will-reveal .case-result { translate: 0 26px; transition: translate .78s .11s var(--ease-out); }
.motion-ready .will-reveal.is-visible .case-result { translate: 0 0; }
@media (min-width: 761px) {
  .motion-ready .case:nth-child(2) { transition-delay: .075s; }
  .motion-ready .case:nth-child(3) { transition-delay: .15s; }
}

@media (max-width: 1000px) {
  .shell { width: calc(100% - 68px); }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 80px; }
  .shell { width: calc(100% - 36px); }
  .header-inner { grid-template-columns: 1fr auto; min-height: 62px; }
  .header nav { display: none; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 30px; padding-top: 46px; }
  h1 { font-size: clamp(37px, 9.6vw, 54px); margin-block: 13px 14px; }
  .actions { margin-top: 20px; }
  .hero-art { aspect-ratio: 1.27; }
  .hero-mark { width: min(59%, 286px); }
  .case-grid { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .case-visual { aspect-ratio: 1.1; min-height: 278px; }
  .case-result { max-width: 340px; }
  .case h3 { margin-top: 12px; }
  .memory-section, .faq { grid-template-columns: minmax(0, 1fr); gap: 23px; }
  .faq { gap: 12px; padding-block: 39px 51px; }
  .download-panel { padding: 39px 16px; }
  .footer { padding-block: 16px 23px; }
  .footer nav { order: 1; flex-basis: 100%; gap: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .motion-ready .will-reveal { opacity: 1; translate: none; }
  .motion-ready .will-reveal .case-result { translate: none; }
  [data-depth] { --drift: 0px !important; }
}