:root {
  --color-bg-primary: #f5f1e8;
  --color-bg-secondary: #e7ddcf;
  --color-bg-tertiary: #d7ded2;
  --color-text-primary: #22201c;
  --color-text-secondary: #6f6a60;
  --color-accent: #7c6f55;
  --color-accent-deep: #3d4a3a;
  --color-border: #d4c8b8;
  --color-copper: #a66f4a;
  --font-display: "Inter Tight", "Arial Narrow", "PingFang TC", "Noto Sans TC", sans-serif;
  --font-body: Inter, "Helvetica Neue", Arial, "PingFang TC", "Noto Sans TC", sans-serif;
  --font-size-display: clamp(4rem, 9.8vw, 9.5rem);
  --font-size-h1: clamp(3rem, 8vw, 7.5rem);
  --font-size-h2: clamp(2.4rem, 5.5vw, 5.5rem);
  --font-size-h3: clamp(1.7rem, 3.2vw, 3rem);
  --font-size-body-lg: clamp(1.25rem, 1.8vw, 1.75rem);
  --font-size-body: 1rem;
  --font-size-small: 0.8125rem;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 9rem;
  --space-3xl: 12.5rem;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --header-height: 5rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(215, 222, 210, 0.44), transparent 16rem),
    var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

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

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

button {
  color: inherit;
  font: inherit;
}

::selection {
  background: var(--color-accent-deep);
  color: var(--color-bg-primary);
}

.skip-link {
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
  left: 1rem;
  padding: 0.7rem 1rem;
  position: fixed;
  top: 1rem;
  transform: translateY(-140%);
  transition: transform 0.2s ease;
  z-index: 1000;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  align-items: center;
  display: flex;
  height: var(--header-height);
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(1.25rem, 3.4vw, 3rem);
  position: fixed;
  right: 0;
  top: 0;
  transition: background 0.35s ease, border-color 0.35s ease, backdrop-filter 0.35s ease;
  z-index: 100;
}

.site-header.is-scrolled {
  backdrop-filter: blur(18px);
  background: rgba(245, 241, 232, 0.78);
  border-bottom: 1px solid rgba(212, 200, 184, 0.72);
}

.brand-mark {
  align-items: baseline;
  display: flex;
  gap: 0.65rem;
  font-size: var(--font-size-small);
  letter-spacing: 0;
  text-transform: uppercase;
}

.brand-mark span:first-child {
  font-weight: 700;
}

.brand-mark span:last-child {
  color: var(--color-text-secondary);
  text-transform: none;
}

.desktop-nav {
  display: flex;
  gap: clamp(1rem, 2.4vw, 2rem);
  font-size: var(--font-size-small);
}

.desktop-nav a {
  color: var(--color-text-secondary);
  position: relative;
  transition: color 0.2s ease;
}

.desktop-nav a::after {
  background: currentColor;
  bottom: -0.4rem;
  content: "";
  height: 1px;
  left: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s var(--ease);
  width: 100%;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.desktop-nav a.is-active {
  color: var(--color-text-primary);
}

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

.menu-button {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  display: none;
  height: 2.8rem;
  place-items: center;
  position: relative;
  width: 2.8rem;
  z-index: 120;
}

.menu-button span {
  background: var(--color-text-primary);
  height: 1px;
  position: absolute;
  transition: transform 0.25s var(--ease);
  width: 1.1rem;
}

.menu-button span:first-child {
  transform: translateY(-0.22rem);
}

.menu-button span:last-child {
  transform: translateY(0.22rem);
}

.menu-button[aria-expanded="true"] span:first-child {
  transform: rotate(45deg);
}

.menu-button[aria-expanded="true"] span:last-child {
  transform: rotate(-45deg);
}

.mobile-menu {
  align-content: space-between;
  background: var(--color-bg-primary);
  display: grid;
  inset: 0;
  opacity: 0;
  padding: 7rem 1.25rem 2rem;
  pointer-events: none;
  position: fixed;
  transform: translateY(-1rem);
  transition: opacity 0.25s ease, transform 0.35s var(--ease);
  z-index: 90;
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-menu nav {
  display: grid;
  gap: 1rem;
}

.mobile-menu a {
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 12vw, 4.6rem);
  line-height: 1.05;
  padding-bottom: 0.8rem;
}

.mobile-menu p {
  color: var(--color-text-secondary);
  margin: 0;
}

.section-anchor {
  position: relative;
}

.section-pad {
  padding: var(--space-3xl) clamp(1.25rem, 3.4vw, 3rem);
}

.hero {
  min-height: 100svh;
  overflow: hidden;
  padding: calc(var(--header-height) + 2.5rem) clamp(1.25rem, 3.4vw, 3rem) 2.5rem;
}

.hero::before {
  background:
    linear-gradient(110deg, rgba(61, 74, 58, 0.12), transparent 40%),
    linear-gradient(270deg, rgba(166, 111, 74, 0.12), transparent 35%);
  content: "";
  inset: 0;
  pointer-events: none;
  position: absolute;
}

.hero-grid {
  display: grid;
  gap: 1rem var(--space-md);
  grid-template-columns: repeat(12, 1fr);
  margin: 0 auto;
  max-width: 1440px;
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-kicker {
  color: var(--color-accent-deep);
  font-size: var(--font-size-small);
  letter-spacing: 0;
  margin: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  grid-column: 1 / 8;
  margin-top: 4vh;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--font-size-display);
  font-weight: 560;
  grid-column: 1 / 13;
  letter-spacing: 0;
  line-height: 0.92;
  margin: 0;
  max-width: 16ch;
}

.hero-title span {
  display: block;
}

.hero-copy {
  color: var(--color-text-primary);
  font-size: var(--font-size-body-lg);
  grid-column: 1 / 6;
  margin: 0;
  max-width: 34rem;
}

.hero-copy-zh {
  color: var(--color-text-secondary);
  font-size: clamp(1.05rem, 1.45vw, 1.35rem);
}

.hero-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  grid-column: 1 / 6;
}

.button {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.92rem;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.2rem;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--color-text-primary);
  border: 1px solid var(--color-text-primary);
  color: var(--color-bg-primary);
}

.button-secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: var(--color-bg-secondary);
}

.hero-visual {
  aspect-ratio: 5 / 4;
  border-radius: 8px;
  bottom: 7vh;
  clip-path: inset(0 round 8px);
  opacity: 0.86;
  overflow: hidden;
  position: absolute;
  right: clamp(1.25rem, 3.4vw, 3rem);
  width: min(27vw, 24rem);
  z-index: 1;
}

.hero-visual img {
  height: 100%;
  object-fit: cover;
  object-position: 78% 23%;
  width: 100%;
}

.rotating-words {
  bottom: 2.5rem;
  color: var(--color-accent-deep);
  display: flex;
  font-size: var(--font-size-small);
  gap: 0.75rem;
  left: clamp(1.25rem, 3.4vw, 3rem);
  position: absolute;
  text-transform: uppercase;
}

.rotating-words span {
  opacity: 0.38;
}

.rotating-words span.is-current {
  opacity: 1;
}

.scroll-hint {
  bottom: 2.5rem;
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  position: absolute;
  right: clamp(1.25rem, 3.4vw, 3rem);
  writing-mode: vertical-rl;
}

.scroll-hint::after {
  animation: scrollPulse 1.7s ease-in-out infinite;
  background: currentColor;
  content: "";
  display: block;
  height: 3.2rem;
  margin: 0.7rem auto 0;
  width: 1px;
}

.section-header {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: minmax(8rem, 2fr) minmax(0, 7fr);
  margin: 0 auto var(--space-xl);
  max-width: 1440px;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--font-size-h2);
  font-weight: 540;
  letter-spacing: 0;
  line-height: 1;
  margin: 0;
}

.section-intro {
  color: var(--color-text-secondary);
  font-size: var(--font-size-body-lg);
  margin: var(--space-md) 0 0;
  max-width: 47rem;
}

.manifesto {
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
}

.manifesto .section-kicker {
  color: #d7ded2;
  margin: 0 auto var(--space-xl);
  max-width: 1440px;
}

.manifesto-layout {
  align-items: end;
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: minmax(0, 8fr) minmax(18rem, 4fr);
  margin: 0 auto;
  max-width: 1440px;
}

.statement-line {
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 6.5vw, 7.8rem);
  font-weight: 530;
  letter-spacing: 0;
  line-height: 1;
  margin: 0 0 var(--space-sm);
  max-width: 11ch;
}

.statement-body {
  color: rgba(245, 241, 232, 0.76);
  font-size: var(--font-size-body-lg);
  margin: var(--space-lg) 0 0;
  max-width: 50rem;
}

.zh {
  color: var(--color-text-secondary);
}

.manifesto .zh {
  color: rgba(245, 241, 232, 0.86);
}

.image-panel,
.about-image {
  border-radius: 8px;
  margin: 0;
  overflow: hidden;
}

.image-panel {
  aspect-ratio: 4 / 5;
}

.image-panel img {
  height: 100%;
  object-fit: cover;
  object-position: 18% 24%;
  width: 100%;
}

.services-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, 1fr);
  margin: 0 auto;
  max-width: 1440px;
}

.service-card {
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid var(--color-border);
  min-height: 31rem;
  padding: var(--space-md);
  transition: background 0.25s ease, transform 0.25s var(--ease), border-color 0.25s ease;
}

.service-card:hover,
.service-card:focus-within {
  background: rgba(215, 222, 210, 0.46);
  border-color: rgba(61, 74, 58, 0.38);
  transform: translateY(-0.35rem);
}

.service-toggle {
  align-items: start;
  background: transparent;
  border: 0;
  cursor: default;
  display: grid;
  gap: var(--space-md);
  padding: 0;
  text-align: left;
  width: 100%;
}

.service-toggle span:first-child {
  color: var(--color-copper);
  font-size: var(--font-size-small);
}

.service-toggle span:last-child {
  font-family: var(--font-display);
  font-size: var(--font-size-h3);
  font-weight: 540;
  line-height: 1.06;
}

.service-content {
  color: var(--color-text-secondary);
  margin-top: var(--space-xl);
}

.service-content p {
  font-size: 1.05rem;
  margin: 0 0 var(--space-lg);
}

.service-content ul {
  border-top: 1px solid var(--color-border);
  list-style: none;
  margin: 0;
  padding: 1rem 0 0;
}

.service-content li {
  border-bottom: 1px solid rgba(212, 200, 184, 0.64);
  padding: 0.62rem 0;
}

.work {
  background: #ece7dc;
}

.work-list {
  margin: 0 auto;
  max-width: 1440px;
}

.work-item {
  align-items: baseline;
  border-top: 1px solid rgba(111, 106, 96, 0.32);
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 4rem minmax(0, 5fr) minmax(13rem, 3fr);
  min-height: 8.5rem;
  padding: 2rem 0;
  position: relative;
  transition: color 0.2s ease, transform 0.25s var(--ease);
}

.work-item:last-child {
  border-bottom: 1px solid rgba(111, 106, 96, 0.32);
}

.work-item:hover,
.work-item:focus-visible {
  color: var(--color-accent-deep);
  transform: translateX(0.75rem);
}

.work-index {
  color: var(--color-copper);
  font-size: var(--font-size-small);
}

.work-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 6.5rem);
  font-weight: 520;
  letter-spacing: 0;
  line-height: 0.95;
}

.work-meta {
  color: var(--color-text-secondary);
  font-size: clamp(0.95rem, 1.2vw, 1.1rem);
}

.work-preview {
  background-image: url("assets/ccvisual-asset-sheet.png");
  background-position: 50% 50%;
  background-size: 250% auto;
  border-radius: 8px;
  box-shadow: 0 24px 90px rgba(34, 32, 28, 0.18);
  height: 20rem;
  opacity: 0;
  pointer-events: none;
  position: fixed;
  transform: translate(-50%, -50%) scale(0.96);
  transition: opacity 0.2s ease, transform 0.25s var(--ease), background-position 0.25s ease;
  width: 16rem;
  z-index: 80;
}

.work-preview.is-visible {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.process {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: minmax(16rem, 4fr) minmax(0, 7fr);
  margin: 0 auto;
}

.process-heading {
  align-self: start;
  position: sticky;
  top: calc(var(--header-height) + 2rem);
}

.process-list {
  display: grid;
}

.process-step {
  border-top: 1px solid var(--color-border);
  display: grid;
  gap: var(--space-sm);
  grid-template-columns: 4rem minmax(10rem, 2fr) minmax(0, 4fr);
  padding: var(--space-lg) 0;
}

.process-step:last-child {
  border-bottom: 1px solid var(--color-border);
}

.process-step span {
  color: var(--color-copper);
  font-size: var(--font-size-small);
}

.process-step h3 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 2.6vw, 2.8rem);
  font-weight: 540;
  line-height: 1;
  margin: 0;
}

.process-step p {
  color: var(--color-text-secondary);
  margin: 0;
}

.process-step .zh {
  grid-column: 3;
  margin-top: 0.45rem;
}

.why {
  background: var(--color-accent-deep);
  color: var(--color-bg-primary);
}

.why .section-kicker,
.why .section-intro {
  color: rgba(245, 241, 232, 0.72);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0 auto;
  max-width: 1440px;
}

.why-block {
  border-left: 1px solid rgba(245, 241, 232, 0.2);
  min-height: 22rem;
  padding: var(--space-md);
}

.why-block:last-child {
  border-right: 1px solid rgba(245, 241, 232, 0.2);
}

.why-block h3 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 2.5vw, 2.9rem);
  font-weight: 530;
  line-height: 1;
  margin: 0 0 var(--space-lg);
}

.why-block p {
  color: rgba(245, 241, 232, 0.72);
  margin: 0;
}

.about {
  background: linear-gradient(180deg, var(--color-bg-tertiary), var(--color-bg-primary));
}

.about > .section-kicker {
  margin: 0 auto var(--space-xl);
  max-width: 1440px;
}

.about-layout {
  align-items: center;
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: minmax(18rem, 5fr) minmax(0, 6fr);
  margin: 0 auto;
  max-width: 1440px;
}

.about-image {
  aspect-ratio: 4 / 5;
}

.about-image img {
  height: 100%;
  object-fit: cover;
  object-position: 82% 78%;
  width: 100%;
}

.about-copy p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-body-lg);
  margin: var(--space-md) 0 0;
}

.contact {
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
  min-height: 86vh;
  padding: var(--space-3xl) clamp(1.25rem, 3.4vw, 3rem) var(--space-xl);
}

.contact-inner {
  display: grid;
  margin: 0 auto;
  max-width: 1440px;
  min-height: 58vh;
}

.contact .section-kicker {
  color: #d7ded2;
}

.contact-title {
  align-self: end;
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 11vw, 12rem);
  font-weight: 530;
  letter-spacing: 0;
  line-height: 0.95;
  margin: var(--space-xl) 0 var(--space-md);
  max-width: 11ch;
}

.contact-copy {
  color: rgba(245, 241, 232, 0.72);
  font-size: var(--font-size-body-lg);
  margin: 0 0 var(--space-md);
  max-width: 34rem;
}

.email-link {
  border-bottom: 1px solid rgba(245, 241, 232, 0.42);
  font-size: clamp(1.55rem, 3vw, 3rem);
  line-height: 1.1;
  padding-bottom: 0.25rem;
  width: max-content;
}

.email-link:hover,
.email-link:focus-visible {
  color: #d7ded2;
}

.contact-meta,
.site-footer {
  color: rgba(245, 241, 232, 0.62);
  display: flex;
  flex-wrap: wrap;
  font-size: var(--font-size-small);
  gap: 1rem;
  justify-content: space-between;
  margin-top: var(--space-xl);
}

.site-footer {
  background: var(--color-text-primary);
  border-top: 1px solid rgba(245, 241, 232, 0.14);
  margin: 0;
  padding: 1.5rem clamp(1.25rem, 3.4vw, 3rem);
}

.reveal {
  opacity: 0;
  transform: translateY(2.5rem);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

:focus-visible {
  outline: 2px solid var(--color-copper);
  outline-offset: 4px;
}

@keyframes scrollPulse {
  0%,
  100% {
    transform: scaleY(0.35);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
}

@media (max-width: 1023px) {
  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: grid;
  }

  .hero-grid,
  .section-header,
  .manifesto-layout,
  .process,
  .about-layout {
    grid-template-columns: 1fr;
  }

  .hero .eyebrow,
  .hero-title,
  .hero-copy,
  .hero-actions {
    grid-column: 1;
  }

  .hero-visual {
    bottom: 7rem;
    opacity: 0.72;
    right: 1.25rem;
    width: min(46vw, 22rem);
  }

  .section-header {
    gap: var(--space-md);
  }

  .services-grid,
  .why-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: 0;
  }

  .work-preview {
    display: none;
  }

  .process-heading {
    position: static;
  }

  .process-step {
    grid-template-columns: 3rem 1fr;
  }

  .process-step p,
  .process-step .zh {
    grid-column: 2;
  }
}

@media (max-width: 767px) {
  :root {
    --space-xl: 4.5rem;
    --space-2xl: 6rem;
    --space-3xl: 7rem;
  }

  .site-header {
    height: 4.5rem;
  }

  .brand-mark span:last-child {
    display: none;
  }

  .hero {
    padding-top: 7rem;
  }

  .hero-title {
    font-size: clamp(3.7rem, 18vw, 6.4rem);
  }

  .hero-copy {
    max-width: 23rem;
  }

  .hero-visual {
    margin-top: var(--space-lg);
    position: relative;
    right: auto;
    bottom: auto;
    width: 100%;
  }

  .rotating-words {
    bottom: 1.4rem;
  }

  .scroll-hint {
    display: none;
  }

  .manifesto-layout {
    gap: var(--space-xl);
  }

  .statement-line {
    max-width: 9.5ch;
  }

  .service-card {
    padding: 1.2rem 0;
  }

  .service-toggle {
    align-items: center;
    cursor: pointer;
    grid-template-columns: 2rem 1fr;
    padding: 0 1.2rem;
  }

  .service-toggle span:last-child {
    font-size: clamp(1.55rem, 7vw, 2.6rem);
  }

  .service-content {
    display: grid;
    grid-template-rows: 0fr;
    margin-top: 1rem;
    overflow: hidden;
    padding: 0 1.2rem;
    transition: grid-template-rows 0.35s var(--ease);
  }

  .service-content > * {
    min-height: 0;
  }

  .service-card.is-open .service-content {
    grid-template-rows: 1fr;
  }

  .service-card:not(.is-open) .service-content {
    margin-top: 0;
  }

  .work-item {
    gap: 0.75rem;
    grid-template-columns: 2.4rem 1fr;
    min-height: 0;
    padding: 1.35rem 0;
  }

  .work-title,
  .work-meta {
    grid-column: 2;
  }

  .work-title {
    font-size: clamp(2rem, 11vw, 4.1rem);
  }

  .why-block {
    border-left: 0;
    border-top: 1px solid rgba(245, 241, 232, 0.2);
    min-height: 0;
  }

  .why-block:last-child {
    border-right: 0;
    border-bottom: 1px solid rgba(245, 241, 232, 0.2);
  }

  .about-layout {
    gap: var(--space-lg);
  }

  .email-link {
    word-break: break-word;
    width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}