:root {
  --paper: #f4f0e6;
  --paper-light: #fbf8f1;
  --paper-shadow: #ddd6c6;
  --ink-blue: #15518f;
  --ink-deep: #17334d;
  --ink-soft: #415669;
  --muted: #73808a;
  --hairline: rgba(21, 81, 143, .22);
}

* { box-sizing: border-box; }

html { background: var(--paper); }

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink-deep);
  background:
    radial-gradient(circle at 18% 15%, rgba(255,255,255,.82), transparent 30%),
    radial-gradient(circle at 82% 86%, rgba(21,81,143,.035), transparent 34%),
    var(--paper);
  font-family: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", Georgia, serif;
  -webkit-font-smoothing: antialiased;
}

.paper-grain {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: .28;
  mix-blend-mode: multiply;
  background-image:
    repeating-linear-gradient(93deg, transparent 0 8px, rgba(55,66,70,.024) 9px, transparent 10px 17px),
    repeating-linear-gradient(4deg, transparent 0 18px, rgba(255,255,255,.22) 19px, transparent 20px 31px);
}

.page-shell {
  width: min(1440px, 100%);
  min-height: 100vh;
  min-height: 100svh;
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(15rem, .62fr) minmax(30rem, 1.58fr);
  align-items: stretch;
  overflow: hidden;
  isolation: isolate;
}

.brand-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: clamp(3rem, 7vw, 7rem);
  background: rgba(251,248,241,.42);
}

.brand-panel::after {
  content: "";
  position: absolute;
  top: 11%;
  right: 0;
  bottom: 11%;
  width: 1px;
  background: linear-gradient(transparent, var(--hairline) 16%, var(--hairline) 84%, transparent);
}

.brand-lockup {
  width: min(15rem, 28vw);
  animation: reveal 800ms ease 180ms both;
}

.brand-en {
  margin: 0;
  color: var(--ink-blue);
  font: 600 clamp(.72rem, .85vw, .84rem)/1.4 Georgia, serif;
  letter-spacing: .34em;
  text-align: center;
}

.brand-rule {
  display: block;
  width: 3.2rem;
  height: 1px;
  margin: 1rem auto .85rem;
  background: var(--ink-blue);
  opacity: .5;
}

.brand-note {
  margin: 0;
  color: var(--muted);
  font-size: .76rem;
  letter-spacing: .25em;
  text-align: center;
}

.story-panel {
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(4rem, 8vw, 8rem) clamp(3.5rem, 9vw, 9rem);
}

.story-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("assets/ink-bamboo-ai.png") right bottom / cover no-repeat;
  opacity: .13;
  filter: saturate(.55) contrast(.82);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.watermark {
  position: absolute;
  inset: 0;
  z-index: -1;
  color: rgba(21,81,143,.035);
  user-select: none;
  pointer-events: none;
}

.watermark-title {
  position: absolute;
  top: 50%;
  right: clamp(-1.5rem, 1.5vw, 1.5rem);
  font-size: clamp(6rem, 12vw, 12rem);
  font-weight: 600;
  line-height: .92;
  letter-spacing: .02em;
  writing-mode: vertical-rl;
  transform: translateY(-50%);
  white-space: nowrap;
}

.watermark-quote {
  position: absolute;
  left: 8%;
  bottom: 5.5%;
  color: rgba(21,81,143,.052);
  font-size: clamp(.72rem, 1vw, .94rem);
  line-height: 2.1;
  letter-spacing: .14em;
  transform: rotate(-.7deg);
}

.watermark-quote p { margin: .35rem 0; }

.watermark-quote cite {
  margin-left: .9em;
  font-size: .78em;
  font-style: normal;
  letter-spacing: .08em;
}

.story-inner { width: min(43rem, 100%); }

.eyebrow {
  margin: 0 0 1.55rem;
  color: var(--ink-blue);
  font: 600 .67rem/1.4 Georgia, serif;
  letter-spacing: .3em;
  animation: reveal 720ms ease 350ms both;
}

h1 {
  margin: 0;
  color: var(--ink-blue);
  font-size: clamp(4.5rem, 8.5vw, 8rem);
  font-weight: 500;
  line-height: .95;
  letter-spacing: .06em;
  animation: reveal 780ms ease 430ms both;
}

.subheading {
  margin: 1.25rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(.95rem, 1.35vw, 1.15rem);
  letter-spacing: .22em;
  animation: reveal 780ms ease 510ms both;
}

.divider {
  display: flex;
  align-items: center;
  width: 100%;
  height: 1px;
  margin: clamp(2rem, 4.2vh, 3rem) 0;
  background: linear-gradient(90deg, var(--ink-blue) 0 1.7rem, var(--hairline) 1.7rem 100%);
  animation: reveal 800ms ease 570ms both;
}

.divider span {
  width: 4px;
  height: 4px;
  margin-left: 1.45rem;
  border-radius: 50%;
  background: var(--ink-blue);
}

.introduction {
  margin: 0;
  color: #344858;
  font-size: clamp(.98rem, 1.3vw, 1.12rem);
  line-height: 2.05;
  letter-spacing: .075em;
  text-align: justify;
  text-justify: inter-ideograph;
  animation: reveal 820ms ease 640ms both;
}

.contact {
  display: flex;
  align-items: center;
  gap: 1.3rem;
  margin-top: clamp(2.4rem, 5vh, 4rem);
  animation: reveal 820ms ease 740ms both;
}

.contact-label {
  color: var(--muted);
  font: 600 .62rem/1.2 Arial, sans-serif;
  letter-spacing: .25em;
}

.contact-link {
  position: relative;
  color: var(--ink-blue);
  font: 500 clamp(.84rem, 1vw, .98rem)/1.4 Georgia, serif;
  letter-spacing: .05em;
  text-decoration: none;
}

.contact-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -.32rem;
  height: 1px;
  background: var(--ink-blue);
  transition: right 240ms ease;
}

.contact-link:hover::after { right: 0; }

.contact-link:focus-visible {
  outline: 2px solid var(--ink-blue);
  outline-offset: 6px;
}

@keyframes reveal {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 900px) {
  .page-shell { grid-template-columns: minmax(13rem, .56fr) minmax(27rem, 1.44fr); }
  .brand-panel { padding-inline: 2.5rem; }
  .story-panel { padding-inline: clamp(2.5rem, 6vw, 4rem); }
}

@media (max-width: 760px) {
  .page-shell {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .brand-panel {
    min-height: 24svh;
    padding: 2.8rem 1.5rem 2.5rem;
  }

  .brand-panel::after {
    top: auto;
    right: 10%;
    bottom: 0;
    left: 10%;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--hairline) 20%, var(--hairline) 80%, transparent);
  }

  .brand-lockup { width: 14rem; }

  .story-panel {
    min-height: 76svh;
    padding: 3.4rem clamp(1.4rem, 7vw, 3rem) 3rem;
  }

  .story-panel::after {
    background-position: 63% bottom;
    background-size: auto 88%;
    opacity: .1;
  }

  .watermark-title {
    top: 3rem;
    right: -.6rem;
    font-size: 7.2rem;
    transform: none;
  }

  .watermark-quote {
    left: 1.5rem;
    right: 1rem;
    bottom: 2rem;
    font-size: .68rem;
    line-height: 1.85;
  }
  h1 { font-size: clamp(4.2rem, 22vw, 6rem); }
  .eyebrow { margin-bottom: 1.2rem; font-size: .6rem; letter-spacing: .22em; }
  .subheading { letter-spacing: .14em; }
  .introduction { font-size: .96rem; line-height: 1.92; text-align: left; }
  .contact { align-items: flex-start; flex-direction: column; gap: .65rem; }
}

@media (max-height: 720px) and (min-width: 761px) {
  .brand-panel, .story-panel { padding-block: 2.5rem; }
  .divider { margin-block: 1.5rem; }
  .contact { margin-top: 1.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-delay: 0ms !important;
    transition-duration: .01ms !important;
  }
}