@font-face {
  font-family: "HZW Serif";
  src: url("/fonts/serif-sub.woff2") format("woff2");
  font-weight: 400 900;
  font-display: swap;
}

:root {
  --paper: #EDF0F0;
  --paper-2: #E2E7E8;
  --ink: #1C2430;
  --slate: #5B6675;
  --rule: #C9D0D3;
  --seal: #B3261E;

  --serif: "HZW Serif", "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --gutter: clamp(16px, 5vw, 64px);
  --label: 9rem;
  --measure: 38rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #161B22;
    --paper-2: #1E242C;
    --ink: #E3E7EA;
    --slate: #9AA4B0;
    --rule: #303842;
    --seal: #D2453B;
  }
}
:root[data-theme="dark"] {
  --paper: #161B22;
  --paper-2: #1E242C;
  --ink: #E3E7EA;
  --slate: #9AA4B0;
  --rule: #303842;
  --seal: #D2453B;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.85 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration-color: var(--seal); text-underline-offset: .25em; text-decoration-thickness: 1px; }
a:hover { color: var(--seal); }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 3px; border-radius: 2px; }

img { display: block; max-width: 100%; height: auto; }

/* top bar */
.bar {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: baseline;
  padding: .9rem var(--gutter);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
}
.bar-name { font-family: var(--serif); font-weight: 700; font-size: 1.05rem; text-decoration: none; letter-spacing: .08em; }
.bar nav { display: flex; gap: clamp(1rem, 3vw, 2rem); font-size: .9rem; }
.bar nav a { text-decoration: none; color: var(--slate); }
.bar nav a:hover { color: var(--seal); }

/* hero */
.hero {
  padding: clamp(3rem, 10vw, 8rem) var(--gutter) clamp(3rem, 8vw, 6rem);
  border-bottom: 1px solid var(--rule);
}
.hero-head { display: flex; align-items: center; gap: clamp(1.25rem, 4vw, 3rem); }
.name {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(4rem, 15vw, 10.5rem);
  line-height: 1;
  letter-spacing: .06em;
}
/* 印：白文方印，右列「韩泽」左列「伟印」，按传统从右往左读 */
.seal {
  --s: clamp(5rem, 13vw, 9.5rem);
  flex: none;
  width: var(--s); height: var(--s);
  display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; grid-auto-flow: column;
  direction: rtl;
  padding: calc(var(--s) * .1);
  background: var(--seal);
  color: var(--paper);
  border-radius: 6% 4% 7% 5%;
  box-shadow: inset 0 0 0 calc(var(--s) * .045) var(--seal), inset 0 0 0 calc(var(--s) * .065) var(--paper);
  font-family: var(--serif); font-weight: 900;
  font-size: calc(var(--s) * .34); line-height: 1;
  transform: rotate(-4deg);
}
.seal span { display: grid; place-items: center; }
@media (prefers-reduced-motion: no-preference) {
  .seal { animation: press .55s cubic-bezier(.2, .9, .3, 1.2) .35s both; }
  @keyframes press {
    from { transform: rotate(-4deg) scale(1.25); }
    to   { transform: rotate(-4deg) scale(1); }
  }
}

.lede {
  max-width: 44rem;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 clamp(2.5rem, 6vw, 4rem);
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--slate);
}

.now { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--rule); }
.now > div {
  display: flex; flex-direction: column-reverse; justify-content: flex-end;
  padding: 1.25rem 1.5rem 1.4rem 0;
  border-bottom: 1px solid var(--rule);
}
.now > div:nth-child(odd) { border-right: 1px solid var(--rule); }
.now > div:nth-child(even) { padding-left: 1.5rem; }
.now dt { font-size: .95rem; color: var(--slate); line-height: 1.6; }
.now dd { margin: 0 0 .35rem; font-family: var(--serif); font-weight: 700; font-size: 1.45rem; line-height: 1.3; }

/* sections */
.block {
  display: grid;
  grid-template-columns: var(--label) minmax(0, 1fr);
  column-gap: 2rem;
  padding: clamp(3rem, 8vw, 6rem) var(--gutter);
  border-bottom: 1px solid var(--rule);
}
.block-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1.2;
  letter-spacing: .12em;
}
.block-body { min-width: 0; }
.block h3 { margin: 0 0 .75rem; font-family: var(--serif); font-weight: 700; font-size: 1.25rem; line-height: 1.4; }
.intro { max-width: var(--measure); margin: 0 0 2.5rem; font-size: 1.1rem; }
.prose p, .svc-col p { max-width: var(--measure); margin: 0 0 1rem; }

/* about */
.about { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 1.5rem 2.5rem; }
.portrait { margin: 0; grid-row: span 2; }
.portrait img { border-radius: 3px; background: #fff; filter: grayscale(.15); }
.timeline { list-style: none; margin: .5rem 0 0; padding: 0; border-top: 1px solid var(--rule); grid-column: 2; }
.timeline li {
  display: grid; grid-template-columns: 4rem minmax(0, 1fr) auto; gap: 1rem;
  padding: .8rem 0; border-bottom: 1px solid var(--rule); align-items: baseline;
}
.t-year { font-family: var(--serif); font-weight: 700; color: var(--seal); font-variant-numeric: tabular-nums; }
.t-org { font-weight: 600; }
.t-role { color: var(--slate); font-size: .92rem; text-align: right; }
.also { grid-column: 2; margin-top: 1.5rem; }
.also ul, .terms ul { margin: 0; padding-left: 1.2em; }
.also li, .terms li { margin: .3rem 0; max-width: var(--measure); }
.also li::marker, .terms li::marker { color: var(--seal); }

/* services */
.svc { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 3rem; }
.for { color: var(--slate); }
.plans { margin: 1.5rem 0 0; border-top: 1px solid var(--rule); }
.plans > div { display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); gap: 1rem; padding: .9rem 0; border-bottom: 1px solid var(--rule); }
.plans dt { font-family: var(--serif); font-weight: 700; }
.plans dd { margin: 0; font-size: .95rem; color: var(--slate); }
.terms { margin-top: 3.5rem; padding: 1.5rem 1.75rem; background: var(--paper-2); border-left: 3px solid var(--seal); }

/* flight */
#flight { padding-bottom: clamp(2rem, 5vw, 3rem); }
#flight .intro { margin-bottom: 2rem; }
.block .strip-label { grid-column: 2; margin: 1.5rem 0 .75rem; font-size: 1rem; color: var(--slate); }
.strip {
  grid-column: 1 / -1;
  display: flex; gap: .75rem;
  overflow-x: auto; scroll-snap-type: x mandatory;
  margin: 0 calc(var(--gutter) * -1); padding: 0 var(--gutter) 1rem;
  scrollbar-width: thin; scrollbar-color: var(--rule) transparent;
}
.strip img {
  height: clamp(220px, 34vw, 420px); width: auto; flex: none;
  object-fit: cover; scroll-snap-align: start; border-radius: 2px;
}

/* contact */
.contact { display: flex; flex-wrap: wrap; gap: 2rem 4rem; align-items: flex-start; }
.qr { margin: 0; width: 11rem; }
.qr img { background: #fff; padding: .5rem; border-radius: 3px; }
.qr figcaption { margin-top: .6rem; font-size: .88rem; color: var(--slate); }
address { font-style: normal; }
address p { margin: 0 0 .75rem; }
address p:first-child { font-family: var(--serif); font-weight: 700; font-size: 1.25rem; }

.foot { padding: 2rem var(--gutter) 3rem; font-size: .8rem; color: var(--slate); }
.foot p { margin: .2rem 0; }
.foot a { text-decoration: none; }

/* narrow */
@media (max-width: 760px) {
  .bar nav { gap: .9rem; }
  .now { grid-template-columns: 1fr; }
  .now > div:nth-child(odd) { border-right: 0; }
  .now > div:nth-child(even) { padding-left: 0; }
  .block { grid-template-columns: 1fr; row-gap: 1.75rem; }
  .about { grid-template-columns: 1fr; }
  .portrait { grid-row: auto; width: 8rem; }
  .timeline, .also, .block .strip-label { grid-column: 1; }
  .timeline li { grid-template-columns: 3.25rem minmax(0, 1fr); row-gap: 0; }
  .t-role { grid-column: 2; text-align: left; }
  .svc { grid-template-columns: 1fr; gap: 2.5rem; }
  .terms { padding: 1.25rem; }
}

/* English page: Latin name needs a smaller size and normal tracking */
:lang(en) .name { font-size: clamp(3.25rem, 11vw, 8rem); letter-spacing: 0; }
:lang(en) .bar-name, :lang(en) .block-title { letter-spacing: 0; }
:lang(en) .hero-head { flex-wrap: wrap; }
:lang(en) .plans > div { grid-template-columns: 8.5rem minmax(0, 1fr); }
@media (max-width: 760px) {
  .bar { gap: 1rem; }
  .bar nav { gap: .75rem; font-size: .85rem; }
  :lang(en) .bar-name { white-space: nowrap; }
  :lang(en) .bar nav { gap: .6rem; font-size: .8rem; }
  :lang(en) .plans > div { grid-template-columns: 1fr; gap: .2rem; }
}
@media (max-width: 400px) {
  :lang(en) .bar-name { display: none; }
  :lang(en) .bar { justify-content: flex-end; }
}