:root {
  --bg: #0B0908;
  --ink: #EDE4D6;
  --ink-60: rgba(237, 228, 214, 0.62);
  --ink-40: rgba(237, 228, 214, 0.38);
  --hairline: rgba(237, 228, 214, 0.16);
  --accent: #7E2B1C;
  --accent-deep: #681F12;
  --accent-ink: #F2E9DC;
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'EB Garamond', Georgia, 'Times New Roman', serif;
  --font-sans: 'Jost', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(120% 92% at 50% -8%, rgba(126, 43, 28, 0.14) 0%, rgba(11, 9, 8, 0) 58%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: clamp(24px, 3.5vw, 48px);
  height: 72px;
  padding: 0 clamp(20px, 4vw, 56px);
  border-bottom: 1px solid var(--hairline);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-mark {
  width: 20px;
  height: 20px;
  transform: rotate(45deg);
  border: 1px solid var(--accent);
  position: relative;
}
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--accent);
}

.logo-text {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.32em;
  color: var(--ink);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
  margin-right: auto;
}

.nav-link {
  position: relative;
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-60);
  padding: 6px 0;
  transition: color 0.25s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }

.header-right {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2vw, 28px);
  flex-shrink: 0;
}


.search {
  display: flex;
  align-items: center;
}

.search-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-60);
  transition: color 0.25s ease;
}
.search-toggle:hover { color: var(--ink); }
.search-toggle svg {
  width: 15px;
  height: 15px;
}

.search-input {
  width: 0;
  opacity: 0;
  margin-left: 0;
  padding: 4px 0;
  border: none;
  border-bottom: 1px solid var(--hairline);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14.5px;
  outline: none;
  transition: width 0.35s ease, opacity 0.35s ease, margin-left 0.35s ease;
}
.search-input::placeholder { color: var(--ink-40); }
.search.open .search-input {
  width: 172px;
  opacity: 1;
  margin-left: 12px;
}


.login-btn {
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-60);
  padding: 8px 18px;
  border: 1px solid var(--hairline);
  transition: color 0.25s ease, border-color 0.25s ease;
}
.login-btn:hover {
  color: var(--ink);
  border-color: var(--ink-40);
}

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: clamp(48px, 7vh, 88px) 20px clamp(40px, 6vh, 72px);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--ink);
}

.hero-title .line {
  display: block;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}
.line-1 {
  font-size: clamp(2.5rem, 9vw, 7.2rem);
  letter-spacing: 0.32em;
  text-indent: 0.32em;
  line-height: 1.12;
  animation-delay: 0.05s;
}
.line-2 {
  font-size: clamp(2.05rem, 7.6vw, 6rem);
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  line-height: 1.16;
  animation-delay: 0.18s;
}
.line-3 {
  font-size: clamp(2.5rem, 9vw, 7.2rem);
  letter-spacing: 0.32em;
  text-indent: 0.32em;
  line-height: 1.12;
  animation-delay: 0.31s;
}

.hero-tagline {
  margin-top: clamp(22px, 3.4vh, 40px);
  font-family: var(--font-body);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1rem, 1.55vw, 1.28rem);
  color: var(--ink);
  opacity: 0;
  animation: rise 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) 0.5s forwards;
}

.hero-sub {
  margin-top: 14px;
  font-size: clamp(0.86rem, 1.05vw, 0.98rem);
  line-height: 1.75;
  color: var(--ink-60);
  opacity: 0;
  animation: rise 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) 0.62s forwards;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 引言板块 ---------- */
.intro {
  background: linear-gradient(178deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: var(--accent-ink);
  padding: clamp(40px, 6vw, 72px) clamp(24px, 6vw, 88px);
  animation: rise 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) 0.4s both;
}

.caption {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: rgba(242, 233, 220, 0.66);
  margin-bottom: 16px;
}

.intro-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 3.6vw, 3rem);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.intro-body {
  max-width: 64ch;
  font-size: clamp(0.95rem, 1.12vw, 1.05rem);
  line-height: 1.78;
  color: rgba(242, 233, 220, 0.88);
  margin-bottom: 30px;
}

.more {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-ink);
  padding-bottom: 2px;
}
.more::after {
  content: "";
  width: 36px;
  height: 1px;
  background: rgba(242, 233, 220, 0.72);
  transition: width 0.3s ease;
}
.more:hover::after { width: 56px; }


.overview {
  position: relative;
  border-top: 1px solid var(--hairline);
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.overview.in-view {
  opacity: 1;
  transform: none;
}

.overview-mosaic {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-auto-rows: 150px;
  grid-auto-flow: dense;
  gap: 12px;
  min-height: 560px;
  opacity: 0.55;
}

.mosaic-item {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.82) saturate(0.88);
}
.mosaic-item:nth-child(1) { grid-column: span 2; grid-row: span 2; }
.mosaic-item:nth-child(2) { grid-column: span 1; grid-row: span 1; }
.mosaic-item:nth-child(3) { grid-column: span 1; grid-row: span 2; }
.mosaic-item:nth-child(4) { grid-column: span 1; grid-row: span 1; }
.mosaic-item:nth-child(5) { grid-column: span 1; grid-row: span 1; }
.mosaic-item:nth-child(6) { grid-column: span 1; grid-row: span 1; }
.mosaic-item:nth-child(7) { grid-column: span 1; grid-row: span 1; }
.mosaic-item:nth-child(8) { grid-column: span 2; grid-row: span 2; }

.overview-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
  z-index: 2;
}
.overview-content::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(62% 62% at 50% 50%, rgba(11, 9, 8, 0.9) 0%, rgba(11, 9, 8, 0.55) 55%, rgba(11, 9, 8, 0.2) 100%);
  z-index: -1;
}

.overview-title-l1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-60);
  text-indent: 0.24em;
}
.overview-title-l2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 5.6vw, 4.6rem);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  line-height: 1.08;
  margin-top: 6px;
}
.overview-sub {
  margin-top: 20px;
  font-family: var(--font-sans);
  font-size: clamp(0.72rem, 0.95vw, 0.85rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-60);
}

.get-in-touch {
  margin-top: 34px;
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent-ink);
  padding: 15px 40px;
  border: 1px solid rgba(242, 233, 220, 0.55);
  background: rgba(126, 43, 28, 0.22);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.get-in-touch:hover {
  background: var(--accent);
  border-color: var(--accent);
}


.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 16px);
  opacity: 0;
  pointer-events: none;
  z-index: 100;
  background: #1D130E;
  border: 1px solid rgba(237, 228, 214, 0.2);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 11px 20px;
  white-space: nowrap;
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}


@media (max-width: 920px) {
  .site-nav { display: none; }
}

@media (max-width: 640px) {
  .site-header {
    height: 62px;
    padding: 0 18px;
    gap: 16px;
  }
  .logo-text { font-size: 12px; }
  .logo { min-height: 44px; }
  .search-toggle {
    min-height: 44px;
    padding: 0 4px;
  }
  .search-toggle span { display: none; }
  .search-input { font-size: 16px; }
  .search.open .search-input { width: 128px; }
  .login-btn {
    min-height: 44px;
    padding: 0 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .hero { padding: 56px 16px 44px; }
  .hero-sub { font-size: 0.95rem; }
  .intro { padding: 38px 22px 46px; }
  .intro-body { font-size: 1rem; }
}


@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .hero-title .line,
  .hero-tagline,
  .hero-sub,
  .intro {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 920px) {
  .overview-mosaic {
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 130px;
    min-height: 640px;
  }
}

@media (max-width: 640px) {
  .overview-mosaic {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 108px;
    min-height: 560px;
  }
  .overview-content { padding: 28px 16px; }
  .overview-sub { letter-spacing: 0.14em; }
  .get-in-touch { padding: 13px 26px; }
}

@media (prefers-reduced-motion: reduce) {
  .overview {
    opacity: 1;
    transform: none;
  }
}
.timeline {
  border-top: 1px solid var(--hairline);
  padding: clamp(64px, 9vw, 120px) clamp(24px, 6vw, 88px);
}

.timeline-title {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--ink);
}
.timeline-title .tt-1 {
  display: block;
  font-weight: 500;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  color: var(--ink-60);
}
.timeline-title .tt-2,
.timeline-title .tt-3 {
  display: block;
  font-size: clamp(2.1rem, 4.6vw, 3.9rem);
  letter-spacing: 0.14em;
  text-indent: 0.14em;
  margin-top: 4px;
}

.timeline-track {
  display: flex;
  align-items: flex-start;
  gap: clamp(48px, 6vw, 96px);
  margin-top: clamp(44px, 6vw, 76px);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 10px;
  scrollbar-width: thin;
  scrollbar-color: rgba(237, 228, 214, 0.28) transparent;
}
.timeline-track::-webkit-scrollbar { height: 4px; }
.timeline-track::-webkit-scrollbar-thumb { background: rgba(237, 228, 214, 0.28); border-radius: 2px; }
.timeline-track::-webkit-scrollbar-track { background: transparent; }

.period {
  flex: 0 0 auto;
}

.period-name {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 1.9vw, 1.7rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.period-range {
  margin-top: 6px;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-60);
}

.period-list {
  list-style: none;
  display: flex;
  gap: clamp(16px, 2.4vw, 28px);
  margin-top: clamp(26px, 3.6vw, 42px);
}


.relic-card {
  flex: 0 0 auto;
  width: clamp(200px, 22vw, 264px);
  border-top: 1px solid var(--hairline);
  padding-top: 18px;
  scroll-snap-align: start;
}
.relic-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  filter: brightness(0.9) saturate(0.92);
}
.relic-name {
  margin-top: 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.05rem, 1.3vw, 1.3rem);
  letter-spacing: 0.04em;
  line-height: 1.3;
  color: var(--ink);
}
.relic-meta {
  margin-top: 6px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-60);
}
.relic-desc {
  margin-top: 4px;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink-60);
}

.timeline-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  width: max-content;
  margin: clamp(44px, 6vw, 68px) auto 0;
  padding: 18px clamp(48px, 7vw, 96px);
  border-radius: 999px;
  background: transparent;
  font-size: 13px;
  letter-spacing: 0.3em;
}
.timeline-cta:hover {
  background: rgba(126, 43, 28, 0.22);
  border-color: var(--accent);
}

/* ===== 精选作品 Selected Works ===== */
.selected-works {
  border-top: 1px solid var(--hairline);
  padding: clamp(56px, 8vw, 100px) clamp(24px, 6vw, 88px);
}
.works-title {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 4.8vw, 4.1rem);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
}
.works-title span {
  font-weight: 500;
  color: var(--ink-60);
}
.works-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: clamp(14px, 2vw, 24px);
  margin-top: clamp(30px, 4vw, 48px);
}
.work-card {
  position: relative;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  aspect-ratio: 1 / 1;          /* 加：每格正方形 */
  display: flex;                /* 加 */
  align-items: center;          /* 加：图片垂直居中 */
  justify-content: center;      /* 加：图片水平居中 */
  overflow: hidden;             /* 加 */
}
.work-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;        /* 加：完整显示，不裁切 */
  display: block;
  filter: brightness(0.92) saturate(0.95);
  transition: filter 0.5s ease, transform 0.5s ease;
}
.work-card:hover img {
  transform: scale(1.05);
  filter: brightness(1);
}
/* 整块新增 */
.work-card.placeholder {
  border: 1px dashed var(--ink-40);
  color: var(--ink-40);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-align: center;
  padding: 12px;
  line-height: 1.6;
}

/* ===== 页脚 Footer（浅色底、暗红字） ===== */
.site-footer {
  background: #F4EEE3;
  color: var(--accent-deep);
  border-top: 1px solid rgba(126, 43, 28, 0.3);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  padding: clamp(44px, 6vw, 72px) clamp(24px, 6vw, 88px) clamp(34px, 4.5vw, 52px);
}
.footer-heading {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  row-gap: 10px;
}
/* Related website：两列排布（左 5 右 2），与设计稿一致 */
.footer-col-links .footer-links {
  grid-template-columns: repeat(2, 1fr);
  column-gap: 28px;
}
.footer-links a {
  font-size: 15px;
  line-height: 1.45;
  color: rgba(104, 31, 18, 0.82);
  transition: color 0.25s ease;
}
.footer-links a:hover {
  color: var(--accent);
}

.footer-institutions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px 36px;
  border-top: 1px solid rgba(126, 43, 28, 0.3);
  padding: 22px clamp(24px, 6vw, 88px);
}
.institution {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.inst-cn {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.inst-en {
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(104, 31, 18, 0.62);
}

/* ===== 新增板块响应式（独立断点，不影响原有 920/640 断点） ===== */
@media (max-width: 920px) {
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {

  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-institutions {
    justify-content: flex-start;
    gap: 16px 28px;
  }
}