:root {
  --ink: #111111;
  --paper: #f8f8f6;
  --line: #d5d5d1;
  --muted: #747470;
  --side: clamp(15.5rem, 20vw, 22rem);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { background: var(--paper); scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.series-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 2;
  display: flex;
  width: var(--side);
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(1.1rem, 2.2vw, 2.6rem) clamp(1rem, 1.85vw, 2.35rem) 1.25rem;
  border-right: 1px solid var(--line);
  background: rgba(248, 248, 246, .97);
  overflow-y: auto;
}
.signature-mark { display: block; width: clamp(4rem, 5vw, 5.2rem); height: clamp(3rem, 3.8vw, 4rem); overflow: hidden; }
.signature-mark img { width: 100%; max-width: none; transform: translateY(-10%); mix-blend-mode: multiply; }
.brand-name { display: block; margin-top: .15rem; font-size: .78rem; font-weight: 500; letter-spacing: .035em; }
.site-links { display: flex; gap: 1rem; margin: 1.1rem 0 clamp(2.3rem, 6vh, 5.5rem); color: var(--muted); font-size: .68rem; letter-spacing: .035em; }
.site-links a:hover, .site-links a:focus-visible { color: var(--ink); }
.sidebar-kicker {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: .65rem;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.series-nav { display: grid; gap: .12rem; }
.series-link {
  display: block;
  padding: .31rem 0 .4rem;
  color: #747470;
  font-size: clamp(.72rem, .89vw, .93rem);
  line-height: 1.18;
  transition: color .18s ease, transform .18s ease;
}
.series-link-en { font-weight: 450; }
.series-link-zh { color: inherit; font-size: .79em; font-weight: 400; }
.series-link:hover, .series-link:focus-visible, .series-link.is-active { color: var(--ink); }
.series-link:hover { transform: translateX(.18rem); }
.series-link.is-active { font-weight: 600; }
.sidebar-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .65rem 1rem;
  color: var(--muted);
  font-size: .66rem;
  letter-spacing: .035em;
}
.sidebar-footer a:hover, .sidebar-footer a:focus-visible { color: var(--ink); }

.viewer {
  width: calc(100% - var(--side));
  margin-left: var(--side);
  background: #ededeb;
}
.empty-series {
  display: grid;
  min-height: 100svh;
  padding: clamp(2rem, 7vw, 8rem);
  place-items: center;
  text-align: center;
}
.empty-series h1 {
  margin: 0;
  font-size: clamp(2.4rem, 4.8vw, 5.2rem);
  font-weight: 500;
  letter-spacing: -.055em;
  line-height: 1.08;
}
.empty-series h1 span { color: #666660; font-size: .43em; font-weight: 400; letter-spacing: .01em; white-space: nowrap; }
.empty-series p { margin: 1.35rem 0 0; color: var(--muted); font-size: .8rem; }
.series-gallery { scroll-snap-type: y proximity; }
.photo-frame {
  display: grid;
  width: 100%;
  min-height: min(100svh, 64vw);
  margin: 0;
  padding: clamp(.65rem, 1.3vw, 1.4rem);
  place-items: center;
  scroll-snap-align: start;
  background: #ededeb;
}
.folding-viewer,
.folding-viewer .photo-frame,
.folding-viewer .series-note,
.folding-viewer .series-pager { background: #fff; }
.photo-frame img {
  width: 100%;
  height: calc(min(100svh, 64vw) - clamp(1.3rem, 2.6vw, 2.8rem));
  object-fit: contain;
}
.photo-frame.landscape img { max-width: min(100%, 106rem); }
.photo-frame.portrait img, .photo-frame.square img { max-width: 93%; }
.folding-frame svg {
  display: block;
  width: 100%;
  height: calc(min(100svh, 64vw) - clamp(1.3rem, 2.6vw, 2.8rem));
}
.series-note {
  min-height: min(72svh, 50rem);
  padding: clamp(4.5rem, 11vw, 12rem) clamp(1.5rem, 8vw, 10rem) clamp(5rem, 10vw, 11rem);
  background: var(--paper);
}
.series-count {
  margin: 0 0 1.3rem;
  color: var(--muted);
  font-size: .66rem;
  letter-spacing: .14em;
}
.series-note h1 {
  max-width: 45rem;
  margin: 0;
  font-size: clamp(2rem, 4.1vw, 5.2rem);
  font-weight: 500;
  letter-spacing: -.055em;
  line-height: .96;
}
.series-note h1 span { color: #666660; font-size: .43em; font-weight: 400; letter-spacing: .01em; white-space: nowrap; }
.series-meta {
  margin: 1.6rem 0 0;
  color: var(--muted);
  font-size: .79rem;
  letter-spacing: .025em;
}
.series-copy {
  max-width: 39rem;
  margin: 2.7rem 0 0;
  font-family: Georgia, "Noto Serif CJK SC", serif;
  font-size: clamp(1rem, 1.35vw, 1.22rem);
  line-height: 1.95;
}
.series-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  background: var(--paper);
}
.series-pager a { min-height: 10rem; padding: clamp(1.35rem, 3vw, 3rem); }
.series-pager a + a { border-left: 1px solid var(--line); text-align: right; }
.series-pager a:hover, .series-pager a:focus-visible { background: #f0f0ed; }
.series-pager small { display: block; margin-bottom: .7rem; color: var(--muted); font-size: .64rem; letter-spacing: .11em; text-transform: uppercase; }
.series-pager span { font-size: clamp(1.1rem, 1.7vw, 1.8rem); letter-spacing: -.035em; }

.contact-viewer {
  display: grid;
  width: calc(100% - var(--side));
  min-height: 100svh;
  margin-left: var(--side);
  padding: clamp(2rem, 8vw, 10rem);
  place-items: center start;
  background: #ededeb;
}
.contact-kicker { margin: 0 0 1.25rem; color: var(--muted); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; }
.contact-viewer h1 { margin: 0 0 2rem; font-size: clamp(3.5rem, 8vw, 8rem); font-weight: 500; letter-spacing: -.075em; line-height: .85; }
.contact-viewer a { font-family: Georgia, serif; font-size: clamp(1.1rem, 2vw, 1.75rem); border-bottom: 1px solid currentColor; }
.about-viewer {
  display: grid;
  width: calc(100% - var(--side));
  min-height: 100svh;
  margin-left: var(--side);
  padding: clamp(2rem, 8vw, 10rem);
  place-items: center start;
  background: #ededeb;
}
.about-viewer section { max-width: 70rem; }
.about-profile { display: grid; grid-template-columns: minmax(12rem, 21rem) minmax(0, 1fr); align-items: center; gap: clamp(2rem, 5vw, 6rem); }
.about-portrait { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: 80% center; }
.about-kicker { margin: 0 0 1.35rem; color: var(--muted); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; }
.about-viewer h1 { margin: 0 0 1.7rem; font-size: clamp(2.5rem, 4vw, 4.2rem); font-weight: 500; letter-spacing: -.06em; line-height: 1; }
.about-copy { max-width: 38rem; font-family: Georgia, "Noto Serif CJK SC", serif; font-size: 1rem; line-height: 1.55; }
.about-copy p { margin: 0 0 1.25em; }

@media (max-height: 760px) and (min-width: 801px) {
  .site-links { margin-bottom: 1.75rem; }
  .series-link { padding: .2rem 0; }
}
@media (max-width: 800px) {
  :root { --side: 0px; }
  .series-sidebar {
    position: relative;
    width: 100%;
    min-height: auto;
    padding: 1rem 1rem .9rem;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    overflow-y: visible;
  }
  .signature-mark { display: inline-block; width: 4rem; height: 3rem; vertical-align: top; }
  .brand-name { margin-top: 0; font-size: .7rem; }
  .site-links { display: inline-flex; margin: .9rem 0 0; vertical-align: top; }
  .sidebar-kicker { display: block; margin: 1.15rem 0 0; }
  .series-nav {
    display: flex;
    width: calc(100% + 2rem);
    margin: .85rem -1rem 0;
    padding: 0 1rem .1rem;
    gap: 1rem;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .series-nav::-webkit-scrollbar { display: none; }
  .series-link { flex: 0 0 auto; padding: 0 0 .45rem; white-space: nowrap; }
  .sidebar-footer { display: none; }
  .viewer, .contact-viewer, .about-viewer { width: 100%; margin-left: 0; }
  .empty-series { min-height: calc(100svh - 9rem); }
  .photo-frame { min-height: min(90svh, 140vw); padding: .55rem; }
  .photo-frame img { height: calc(min(90svh, 140vw) - 1.1rem); }
  .folding-frame svg { height: calc(min(90svh, 140vw) - 1.1rem); }
  .photo-frame.portrait img, .photo-frame.square img { max-width: 100%; }
  .series-note { min-height: auto; padding: 4.5rem 1.25rem 5.2rem; }
  .series-note h1 { font-size: clamp(2.15rem, 10vw, 4rem); }
  .series-pager a { min-height: 8.5rem; padding: 1.25rem; }
  .series-pager span { font-size: 1.05rem; }
  .contact-viewer, .about-viewer { min-height: calc(100svh - 11rem); padding: 2rem 1.25rem; }
  .about-profile { grid-template-columns: 1fr; gap: 2rem; }
  .about-portrait { width: min(100%, 21rem); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .series-link { transition: none; }
}