:root {
  --paper: #f7f3ee;
  --paper-deep: #eee8e1;
  --ink: #2f1a5b;
  --ink-soft: #665b78;
  --vermillion: #ad3324;
  --line: rgba(47, 26, 91, 0.22);
  --paper-line: rgba(247, 243, 238, 0.24);
  --serif: "Songti TC", "Noto Serif TC", "Source Han Serif TC", "PMingLiU", serif;
  --sans: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  --gutter: clamp(1.5rem, 5vw, 5.5rem);
  --section-space: clamp(6.5rem, 13vw, 12rem);
  --max-width: 92rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 32% 18%, rgba(255, 255, 255, 0.48), transparent 35%),
    var(--paper);
  font-family: var(--serif);
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  content: "";
  opacity: 0.18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.075'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.skip-link {
  position: absolute;
  top: auto;
  left: -10000px;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--sans);
}

.skip-link:focus {
  position: fixed;
  top: 1rem;
  left: 1rem;
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 100%;
  height: 2px;
  background: var(--vermillion);
  transform: scaleX(0);
  transform-origin: left;
}

.section-shell {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: calc(100% - (var(--gutter) * 2));
  max-width: calc(var(--max-width) - (var(--gutter) * 2));
  min-height: 7.5rem;
  margin-inline: auto;
  border-bottom: 1px solid var(--line);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}

.brand-icon {
  display: block;
  width: 3rem;
  height: 3rem;
  overflow: hidden;
  border-radius: 50%;
}

.brand-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.46);
  mix-blend-mode: multiply;
}

.brand-name {
  font-size: 1.45rem;
  letter-spacing: 0.14em;
}

.brand-copy small {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.48rem;
  font-family: var(--serif);
  letter-spacing: 0.28em;
}

.mini-seal {
  display: grid;
  place-items: center;
  width: 1.45rem;
  height: 1.85rem;
  color: var(--vermillion);
  border: 1px solid var(--vermillion);
  font-size: 0.55rem;
  letter-spacing: 0.05em;
  writing-mode: vertical-rl;
}

.site-nav {
  display: flex;
  gap: clamp(1.5rem, 4vw, 4rem);
  font-size: 1rem;
  letter-spacing: 0.12em;
}

.site-nav a {
  position: relative;
  padding-block: 0.6rem;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  content: "";
  background: var(--vermillion);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 240ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.hero {
  position: relative;
  display: grid;
  align-items: center;
  min-height: 100svh;
  padding: 10rem var(--gutter) 7rem;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(100%, var(--max-width));
  margin-inline: auto;
}

.hero h1 {
  max-width: 74rem;
  margin: 0;
  font-size: clamp(3.15rem, 4.8vw, 6rem);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: 0.025em;
}

.hero h1 span {
  display: block;
  opacity: 0;
  transform: translateY(1.2rem);
  animation: hero-line 900ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.keep-together {
  font-weight: inherit;
  white-space: nowrap;
}

.hero h1 span:nth-child(2) {
  animation-delay: 140ms;
}

.hero-content > p {
  margin: clamp(2rem, 4vw, 4rem) 0 0;
  font-size: clamp(1.12rem, 1.55vw, 1.55rem);
  letter-spacing: 0.14em;
  opacity: 0;
  animation: hero-line 900ms 520ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-mark {
  position: absolute;
  right: -8vw;
  bottom: -4vw;
  width: clamp(24rem, 46vw, 48rem);
  pointer-events: none;
  opacity: 0.07;
}

.hero-mark img,
.core-mark img {
  width: 100%;
  mix-blend-mode: multiply;
}

.scroll-cue {
  position: absolute;
  bottom: 2.25rem;
  left: 50%;
  z-index: 3;
  display: grid;
  justify-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-family: var(--sans);
  letter-spacing: 0.18em;
  transform: translateX(-50%);
}

.scroll-cue span {
  font-size: 1.4rem;
  animation: drift 1.8s ease-in-out infinite;
}

.philosophy {
  position: relative;
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.section-number {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: clamp(3.5rem, 8vw, 7rem);
  color: var(--vermillion);
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}

.section-number::after {
  width: 4rem;
  height: 1px;
  content: "";
  background: var(--vermillion);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(20rem, 1.1fr);
  gap: clamp(3rem, 9vw, 10rem);
}

.section-heading {
  padding-right: clamp(1rem, 4vw, 4rem);
  border-right: 1px solid var(--vermillion);
}

.section-heading h2,
.beliefs > h2 {
  margin: 0;
  font-size: clamp(3rem, 5.5vw, 6.5rem);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: 0.07em;
}

.prose {
  align-self: end;
  max-width: 43rem;
  font-size: clamp(1.15rem, 1.45vw, 1.5rem);
  line-height: 2.15;
  letter-spacing: 0.07em;
}

.prose p {
  margin: 0 0 1.8rem;
}

.prose .lead {
  font-size: 1.15em;
}

.manifesto-quote {
  position: relative;
  margin: clamp(6rem, 11vw, 11rem) 0 0;
  padding: clamp(3.5rem, 7vw, 7rem) clamp(1rem, 7vw, 7rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.manifesto-quote p {
  margin: 0;
  font-size: clamp(2.2rem, 4.3vw, 5.2rem);
  line-height: 1.7;
  letter-spacing: 0.055em;
}

.quote-mark {
  position: absolute;
  top: 1rem;
  left: 0;
  color: var(--vermillion);
  font-size: clamp(4rem, 8vw, 8rem);
  line-height: 1;
}

.quote-mark-end {
  top: auto;
  right: 0;
  bottom: -0.35em;
  left: auto;
}

.meanings {
  padding-block: var(--section-space);
  background: rgba(238, 232, 225, 0.48);
}

.meaning-intro {
  display: flex;
  justify-content: flex-end;
  margin-bottom: clamp(4rem, 8vw, 8rem);
}

.meaning-intro p {
  width: min(100%, 35rem);
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 1rem;
  letter-spacing: 0.16em;
}

.meaning-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  min-height: 44rem;
}

.meaning-item {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: clamp(1rem, 2.5vw, 2.5rem);
  min-width: 0;
  padding-inline: clamp(0.5rem, 2vw, 2rem);
  border-left: 1px solid var(--line);
}

.meaning-item:last-child {
  border-right: 1px solid var(--line);
}

.meaning-item:nth-child(2) {
  padding-top: 6rem;
}

.meaning-item:nth-child(3) {
  padding-top: 12rem;
}

.meaning-item:nth-child(4) {
  padding-top: 18rem;
}

.meaning-item h2 {
  margin: 0;
  font-size: clamp(5.5rem, 9vw, 10.5rem);
  font-weight: 400;
  line-height: 0.9;
}

.meaning-copy {
  display: block;
  padding-block-start: 1.2rem;
  border-block-start: 1px solid var(--vermillion);
  writing-mode: vertical-rl;
}

.meaning-copy::before {
  display: none;
}

.meaning-copy p {
  margin: 0;
  font-size: clamp(0.95rem, 1.2vw, 1.18rem);
  line-height: 1.85;
  letter-spacing: 0.14em;
}

.meaning-copy p + p {
  margin-right: 0.75rem;
}

.beliefs {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.beliefs > h2 {
  margin-bottom: clamp(4rem, 8vw, 8rem);
  text-align: center;
}

.belief-list {
  max-width: 70rem;
  margin-inline: auto;
  border-top: 1px solid var(--line);
}

.belief-list p {
  display: grid;
  grid-template-columns: minmax(7rem, 0.35fr) 1fr;
  align-items: baseline;
  gap: clamp(1.5rem, 5vw, 6rem);
  margin: 0;
  padding: clamp(1.8rem, 3.2vw, 3rem) 0;
  border-bottom: 1px solid var(--line);
}

.belief-list strong {
  font-size: clamp(1.6rem, 2.6vw, 2.6rem);
  font-weight: 400;
  letter-spacing: 0.18em;
}

.belief-list span {
  font-size: clamp(1.1rem, 1.65vw, 1.55rem);
  letter-spacing: 0.12em;
}

.core {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  background: var(--ink);
}

.core-inner {
  position: relative;
  min-height: 76svh;
  padding-top: var(--section-space);
  padding-bottom: clamp(6rem, 12vw, 10rem);
}

.core h2 {
  margin: 0 0 clamp(4rem, 7vw, 7rem);
  font-size: clamp(1rem, 1.3vw, 1.25rem);
  font-weight: 400;
  font-family: var(--sans);
  letter-spacing: 0.45em;
}

.core h2::after {
  display: block;
  width: 3.5rem;
  height: 1px;
  margin-top: 1.5rem;
  content: "";
  background: var(--paper);
}

.core-statement {
  position: relative;
  z-index: 2;
  max-width: 73rem;
}

.core-statement p {
  margin: 0;
  font-size: clamp(2.8rem, 5.45vw, 6.4rem);
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: 0.05em;
}

.core-statement p + p {
  margin-top: 2rem;
}

.seal {
  position: absolute;
  top: clamp(6rem, 12vw, 10rem);
  right: var(--gutter);
  z-index: 2;
  display: grid;
  place-items: center;
  width: 2.7rem;
  height: 4rem;
  color: var(--vermillion);
  border: 1px solid var(--vermillion);
  font-size: 0.9rem;
  line-height: 1.45;
}

.core-mark {
  position: absolute;
  right: -11rem;
  bottom: -13rem;
  width: min(47rem, 60vw);
  opacity: 0.05;
}

.core-mark img {
  filter: invert(1);
}

.site-footer {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  min-height: 10rem;
  padding-top: 2rem;
  padding-bottom: 2.5rem;
  border-top: 1px solid var(--paper-line);
}

.footer-brand .brand-icon img {
  filter: invert(1);
  mix-blend-mode: screen;
}

.footer-brand small {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.55rem;
  font-family: var(--serif);
  letter-spacing: 0.28em;
}

.site-footer > p {
  margin: 0;
  font-size: 0.82rem;
  font-family: var(--sans);
  letter-spacing: 0.12em;
  opacity: 0.72;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(2rem);
  transition:
    opacity 800ms ease,
    transform 800ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes hero-line {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(0.35rem); }
}

@media (max-width: 960px) {
  .site-header {
    min-height: 6.5rem;
  }

  .hero {
    padding-top: 9rem;
  }

  .philosophy-grid {
    grid-template-columns: 1fr;
  }

  .section-heading {
    max-width: 43rem;
    padding: 0 0 2rem;
    border-right: 0;
    border-bottom: 1px solid var(--vermillion);
  }

  .meaning-grid {
    grid-template-columns: repeat(2, 1fr);
    min-height: auto;
    row-gap: 5rem;
  }

  .meaning-item:nth-child(n) {
    min-height: 26rem;
    padding-top: 0;
  }

  .meaning-item:nth-child(2),
  .meaning-item:nth-child(4) {
    padding-top: 5rem;
  }

  .meaning-item:nth-child(2) {
    border-right: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 1.25rem;
    --section-space: 6rem;
  }

  .site-header {
    width: calc(100% - 2.5rem);
  }

  .brand-icon {
    width: 2.35rem;
    height: 2.35rem;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .brand-copy small,
  .mini-seal {
    display: none;
  }

  .site-nav {
    gap: 1rem;
    font-size: 0.78rem;
  }

  .hero {
    min-height: 100svh;
    padding-inline: var(--gutter);
  }

  .hero h1 {
    font-size: clamp(2.35rem, 9.8vw, 3.4rem);
    line-height: 1.38;
  }

  .hero h1 span:nth-child(2) {
    margin-top: 0.4rem;
  }

  .hero-content > p {
    max-width: 15em;
    font-size: 1rem;
    line-height: 1.9;
  }

  .hero-mark {
    right: -9rem;
    bottom: 3rem;
    width: 27rem;
  }

  .scroll-cue {
    bottom: 1.25rem;
  }

  .manifesto-quote {
    padding-inline: 0.5rem;
  }

  .manifesto-quote p {
    font-size: 1.85rem;
    line-height: 1.75;
  }

  .meaning-intro {
    justify-content: flex-start;
  }

  .meaning-grid {
    display: block;
  }

  .meaning-item,
  .meaning-item:nth-child(n) {
    display: grid;
    grid-template-columns: 6.2rem 1fr;
    align-items: center;
    gap: 1.5rem;
    min-height: 0;
    padding: 2.75rem 0;
    border-top: 1px solid var(--line);
    border-right: 0;
    border-left: 0;
  }

  .meaning-item:last-child {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .meaning-item h2 {
    font-size: 5.4rem;
  }

  .meaning-copy {
    display: block;
    padding-block-start: 0;
    border-block-start: 0;
    writing-mode: horizontal-tb;
  }

  .meaning-copy::before {
    display: block;
    width: 2.75rem;
    height: 1px;
    margin-bottom: 1.2rem;
  }

  .meaning-copy p {
    font-size: 1rem;
    line-height: 1.8;
  }

  .meaning-copy p + p {
    margin-top: 0.35rem;
  }

  .belief-list p {
    display: block;
  }

  .belief-list strong,
  .belief-list span {
    display: block;
  }

  .belief-list strong {
    margin-bottom: 0.9rem;
  }

  .belief-list span {
    line-height: 1.8;
  }

  .core-inner {
    min-height: 78svh;
  }

  .core-statement p {
    font-size: clamp(2.55rem, 11vw, 3.6rem);
    line-height: 1.5;
  }

  .seal {
    right: 1.25rem;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}