:root {
  --paper: #f3f0ea;
  --paper-soft: #e9e4d8;
  --ink: #14140f;
  --ink-soft: #2b2b22;
  --muted: #7a7770;
  --line: #d6d1c2;
  --accent: #1a1a14;
  --warm: #b9a17a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Helvetica Neue", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.serif {
  font-family: "EB Garamond", "Source Serif Pro", "Songti TC", "Noto Serif TC", "PingFang TC", Georgia, serif;
  font-weight: 400;
  letter-spacing: 0.005em;
}

.arch-nav {
  position: sticky;
  top: 0;
  z-index: 12;
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 32px;
  padding: 20px clamp(20px, 5vw, 64px);
  background: rgba(243, 240, 234, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.arch-nav .back-link {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.arch-brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.arch-brand .mark {
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-style: italic;
  font-size: 1.6rem;
  line-height: 1;
}

.arch-brand .name {
  font-size: 0.74rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink);
}

.arch-nav-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.arch-nav-links a:hover,
.arch-nav-links a.active {
  color: var(--ink);
}

.arch-cta {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  transition: background 200ms ease, color 200ms ease;
}

.arch-cta:hover {
  background: var(--ink);
  color: var(--paper);
}

main {
  padding-bottom: 96px;
}

.arch-hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  padding: clamp(60px, 9vw, 120px) clamp(20px, 5vw, 80px) clamp(60px, 8vw, 100px);
  align-items: end;
}

.arch-hero .eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.74rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 28px;
}

.arch-hero .eyebrow::before {
  content: "";
  width: 36px;
  height: 1px;
  background: var(--muted);
}

.arch-hero h1 {
  margin: 0 0 32px;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.arch-hero h1 em {
  font-style: italic;
  color: var(--warm);
}

.arch-hero .lead {
  font-size: 1.06rem;
  color: var(--ink-soft);
  max-width: 460px;
  margin: 0 0 36px;
}

.arch-meta {
  display: flex;
  gap: 36px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.arch-meta div span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.arch-meta div strong {
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-weight: 500;
  font-size: 1.6rem;
}

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 5;
  background: #2a2820;
  overflow: hidden;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(20, 20, 15, 0.4) 100%);
  pointer-events: none;
}

.hero-tag {
  position: absolute;
  left: 24px;
  bottom: 24px;
  z-index: 2;
  padding: 14px 18px;
  background: var(--paper);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--ink);
}

.hero-tag strong {
  display: block;
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-style: italic;
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  margin-bottom: 4px;
}

.arch-section {
  padding: clamp(60px, 8vw, 110px) clamp(20px, 5vw, 80px);
  border-top: 1px solid var(--line);
}

.arch-section .section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.arch-section .section-head .index {
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-style: italic;
  font-size: 1.2rem;
  color: var(--muted);
}

.arch-section .section-head h2 {
  margin: 0;
  font-family: "EB Garamond", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-weight: 400;
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
  padding-left: 248px;
}

.philosophy-grid article h3 {
  margin: 0 0 14px;
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-weight: 500;
  font-size: 1.4rem;
}

.philosophy-grid article p {
  color: var(--ink-soft);
  margin: 0;
  font-size: 0.96rem;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 28px 32px;
}

.work-item {
  display: block;
  cursor: pointer;
}

.work-item .frame {
  position: relative;
  aspect-ratio: 4 / 5;
  background: var(--paper-soft);
  overflow: hidden;
  margin-bottom: 18px;
}

.work-item .frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 600ms cubic-bezier(0.2, 0.65, 0.25, 1);
}

.work-item:hover .frame img {
  transform: scale(1.04);
}

.work-item .frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 70%, rgba(20, 20, 15, 0.18) 100%);
  pointer-events: none;
  transition: background 240ms ease;
}

.work-item:hover .frame::after {
  background: linear-gradient(180deg, rgba(20, 20, 15, 0.08) 0%, rgba(20, 20, 15, 0.28) 100%);
}

.work-item .meta {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  gap: 10px;
  align-items: baseline;
  font-size: 0.84rem;
}

.work-item .meta .num {
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-style: italic;
  color: var(--muted);
}

.work-item .meta .title {
  font-family: "EB Garamond", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--ink);
}

.work-item .meta .year {
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.work-item .sub {
  grid-column: 2 / -1;
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 4px;
}

.work-item.size-half { grid-column: span 3; }
.work-item.size-half .frame { aspect-ratio: 5 / 4; }
.work-item.size-third { grid-column: span 2; }
.work-item.size-third .frame { aspect-ratio: 4 / 5; }
.work-item.size-full { grid-column: span 6; }
.work-item.size-full .frame { aspect-ratio: 16 / 7; }

.process-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 56px;
  padding-left: 248px;
}

.process-list article .roman {
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-style: italic;
  font-size: 1rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.process-list article h3 {
  margin: 0 0 10px;
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-weight: 500;
  font-size: 1.4rem;
}

.process-list article p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--ink-soft);
}

.partners {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.partner-card .portrait {
  aspect-ratio: 4 / 5;
  margin-bottom: 18px;
  background: linear-gradient(180deg, #d8d1bf 0%, #6f6856 100%);
  position: relative;
  overflow: hidden;
}

.partner-card.p-a .portrait { background: linear-gradient(180deg, #dcd4be 0%, #514c3b 100%); }
.partner-card.p-b .portrait { background: linear-gradient(180deg, #c9c0a8 0%, #312d23 100%); }
.partner-card.p-c .portrait { background: linear-gradient(180deg, #e3dcc6 0%, #877e64 100%); }

.partner-card .portrait::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  top: 18%;
  bottom: 0;
  background: radial-gradient(60% 60% at 50% 35%, rgba(20, 20, 15, 0.35), transparent 70%);
}

.partner-card h3 {
  margin: 0 0 4px;
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-weight: 500;
  font-size: 1.3rem;
}

.partner-card .role {
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 10px;
}

.partner-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.contact-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-block h2 {
  margin: 0 0 24px;
  font-family: "EB Garamond", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.contact-info {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.contact-info > div {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.contact-info span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.contact-info strong {
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-weight: 500;
  font-size: 1.1rem;
}

.arch-form {
  display: grid;
  gap: 16px;
}

.arch-form label {
  display: grid;
  gap: 6px;
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.arch-form input,
.arch-form textarea {
  border: 0;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  padding: 10px 0;
  font-size: 1rem;
  color: var(--ink);
  resize: vertical;
}

.arch-form input:focus,
.arch-form textarea:focus {
  outline: none;
  border-bottom-color: var(--warm);
}

.arch-form button {
  justify-self: start;
  margin-top: 10px;
  padding: 14px 26px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease;
}

.arch-form button:hover {
  background: var(--paper);
  color: var(--ink);
}

.arch-form .ack {
  font-size: 0.86rem;
  color: var(--warm);
  margin-top: 4px;
}

.arch-foot {
  border-top: 1px solid var(--line);
  padding: 40px clamp(20px, 5vw, 80px);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.12em;
}

.arch-foot strong {
  font-family: "EB Garamond", "Songti TC", Georgia, serif;
  font-style: italic;
  font-size: 1.1rem;
  color: var(--ink);
  letter-spacing: 0;
}

.project-hero {
  position: relative;
  width: 100%;
  height: clamp(420px, 70vh, 720px);
  overflow: hidden;
  background: #2a2820;
}

.project-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(20, 20, 15, 0.55) 100%);
  pointer-events: none;
}

.project-hero-tag {
  position: absolute;
  left: clamp(20px, 5vw, 80px);
  bottom: clamp(20px, 5vw, 56px);
  padding: 16px 22px;
  background: var(--paper);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--ink);
  z-index: 2;
}

.project-hero-tag strong {
  display: block;
  margin-top: 6px;
  font-family: "EB Garamond", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-style: italic;
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.project-intro-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.project-specs {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 32px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.project-specs > div dt {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.project-specs > div dd {
  margin: 0;
  font-family: "EB Garamond", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-size: 1.2rem;
  font-weight: 500;
}

.gallery-rows {
  display: grid;
  gap: 28px;
}

.gallery-row {
  margin: 0;
  display: grid;
  gap: 14px;
}

.gallery-row img {
  width: 100%;
  height: clamp(360px, 60vh, 620px);
  object-fit: cover;
  display: block;
}

.gallery-row.two {
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.gallery-row.two figure {
  margin: 0;
  display: grid;
  gap: 14px;
}

.gallery-row.two img {
  height: clamp(320px, 48vh, 520px);
}

.gallery-row figcaption {
  font-family: "EB Garamond", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-style: italic;
  font-size: 0.96rem;
  color: var(--muted);
  max-width: 640px;
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.materials-grid article {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.materials-grid .mat-num {
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  display: block;
  margin-bottom: 14px;
}

.materials-grid h3 {
  margin: 0 0 10px;
  font-family: "EB Garamond", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-weight: 500;
  font-size: 1.3rem;
}

.materials-grid p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--ink-soft);
}

.project-cta {
  background: var(--paper-soft);
}

.project-cta-inner {
  max-width: 640px;
}

@media (max-width: 900px) {
  .project-intro-grid { grid-template-columns: 1fr; }
  .gallery-row.two { grid-template-columns: 1fr; }
  .materials-grid { grid-template-columns: 1fr 1fr; }
  .arch-nav { grid-template-columns: 1fr 1fr; }
  .arch-nav-links { grid-column: 1 / -1; order: 3; justify-content: flex-start; flex-wrap: wrap; }
  .arch-hero { grid-template-columns: 1fr; }
  .arch-section .section-head { grid-template-columns: 1fr; gap: 16px; margin-bottom: 32px; }
  .philosophy-grid,
  .process-list { padding-left: 0; grid-template-columns: 1fr; gap: 32px; }
  .works-grid { grid-template-columns: 1fr; }
  .work-item.size-half,
  .work-item.size-third,
  .work-item.size-full { grid-column: span 1; }
  .work-item.size-half .frame,
  .work-item.size-third .frame,
  .work-item.size-full .frame { aspect-ratio: 4 / 3; }
  .partners { grid-template-columns: 1fr; }
  .contact-block { grid-template-columns: 1fr; gap: 40px; }
}

.yuwai-back {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
}

.yuwai-back:hover {
  color: var(--ink);
}