:root {
  --color-primary: #0B2D5A;
  --color-primary-deep: #071A2E;
  --color-primary-bright: #14345F;
  --color-bg: #F5F3EE;
  --color-accent: #C9A227;
  --color-accent-light: #E6D7A7;
  --color-alert: #D32F2F;
  --color-wine: #7B2D3B;
  --color-purple: #3A2E58;
  --color-text: #2D2D2D;
  --color-text-soft: #5A564F;
  --color-text-light: #EAE6DF;
  --font-head: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-body: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "SimSun", Georgia, serif;
  --font-annotation: "Source Han Serif SC", "Noto Serif CJK SC", "KaiTi", "STKaiti", serif;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 30px rgba(7, 26, 46, 0.08);
  --shadow-lift: 0 16px 44px rgba(7, 26, 46, 0.13);
  --content-max: 1200px;
  --section-gap: clamp(48px, 8vw, 96px);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, dl, dd, figure,
blockquote, table, pre {
  margin: 0;
  padding: 0;
}

ul[class],
ol[class] {
  list-style: none;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: rgba(201, 162, 39, 0.28);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(rgba(7, 26, 46, 0.022) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-primary-deep);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

p {
  margin-bottom: 1rem;
}

a {
  transition: color 0.25s ease;
}

.site-main {
  min-height: 60vh;
}

#main-content {
  scroll-margin-top: 90px;
}

.container {
  width: min(var(--content-max), 100% - 2rem);
  margin-inline: auto;
}

.section {
  padding: var(--section-gap) 0;
}

.section--light {
  background: #FFFFFF;
}

.section--dark {
  background:
    radial-gradient(ellipse at 80% -20%, rgba(201, 162, 39, 0.12), transparent 55%),
    linear-gradient(135deg, var(--color-primary-deep), var(--color-primary));
  color: var(--color-text-light);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--color-text-light);
}

.section-head {
  max-width: 720px;
  margin: 0 auto clamp(40px, 6vw, 64px);
  text-align: center;
}

.section-head__label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.4em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.section-head__label::before,
.section-head__label::after {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent));
}

.section-head__label::after {
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

.section-head__title {
  margin-top: 14px;
}

.section-head__desc {
  margin-top: 14px;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.section--dark .section-head__desc {
  color: rgba(234, 230, 223, 0.75);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  line-height: 1.2;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), #B18A1A);
  color: var(--color-primary-deep);
  box-shadow: 0 6px 18px rgba(201, 162, 39, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 10px 28px rgba(201, 162, 39, 0.5);
}

.btn-outline {
  border: 1.5px solid rgba(7, 26, 46, 0.2);
  color: var(--color-primary);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(201, 162, 39, 0.06);
}

.btn--light {
  border-color: rgba(234, 230, 223, 0.4);
  color: var(--color-text-light);
}

.btn--light:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0;
  font-size: 0.82rem;
  color: var(--color-text-soft);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb__sep {
  color: var(--color-accent);
  opacity: 0.6;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-wine);
  font-weight: 600;
}

.card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid rgba(7, 26, 46, 0.06);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  background: var(--color-accent-light);
  color: var(--color-wine);
}

.tag--gold {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: var(--color-primary-deep);
}

.tag--red {
  background: var(--color-alert);
  color: #FFFFFF;
}

.tag--dark {
  background: var(--color-primary);
  color: var(--color-accent-light);
}

.exhibit-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.exhibit-label::before {
  content: "";
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

.plate {
  background: var(--color-bg);
  border: 1px solid rgba(7, 26, 46, 0.08);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.plate::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 24px;
  width: 44px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-wine));
}

.plate__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--color-primary-deep);
}

.plate__meta {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-wine);
  margin-bottom: 12px;
}

.plate__desc {
  font-size: 0.875rem;
  color: var(--color-text-soft);
}

.frame {
  position: relative;
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 40px);
  background: #FFFFFF;
  border: 1px solid rgba(7, 26, 46, 0.07);
  box-shadow: var(--shadow-card);
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 34px;
  height: 34px;
  border-color: var(--color-accent);
  border-style: solid;
  transition: width 0.3s ease, height 0.3s ease;
}

.frame::before {
  top: 10px;
  left: 10px;
  border-width: 2px 0 0 2px;
  border-radius: 10px 0 0 0;
}

.frame::after {
  bottom: 10px;
  right: 10px;
  border-width: 0 2px 2px 0;
  border-radius: 0 0 10px 0;
}

.frame:hover::before,
.frame:hover::after {
  width: 44px;
  height: 44px;
}

.img-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(135deg, rgba(201, 162, 39, 0.18), rgba(123, 45, 59, 0.22)),
    var(--color-primary-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-light);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
}

.img-frame::after {
  content: attr(data-caption);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 16px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: rgba(234, 230, 223, 0.9);
  background: linear-gradient(0deg, rgba(7, 26, 46, 0.72), transparent);
}

.divider {
  height: 2px;
  border: none;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent) 35%, var(--color-wine) 75%, transparent);
}

.text-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: var(--color-text-light);
  background:
    repeating-linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.014) 0 1px,
      transparent 1px 14px
    ),
    radial-gradient(ellipse at 82% -20%, rgba(201, 162, 39, 0.14), transparent 55%),
    linear-gradient(115deg, var(--color-primary-deep) 0%, var(--color-primary) 60%, var(--color-primary-bright) 100%);
  box-shadow: 0 4px 24px rgba(7, 26, 46, 0.3);
}

.site-header[data-scrolled] {
  box-shadow: 0 6px 30px rgba(7, 26, 46, 0.45);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  z-index: 200;
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-primary-deep);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 4px 16px rgba(201, 162, 39, 0.4);
}

.skip-link:focus {
  left: 10px;
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 14px);
  color: #FFFFFF;
  flex-shrink: 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: clamp(36px, 5.5vw, 48px);
  height: clamp(36px, 5.5vw, 48px);
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: var(--color-primary-deep);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  box-shadow: 0 2px 12px rgba(201, 162, 39, 0.4);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(0.92rem, 4.6vw, 1.15rem);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.brand-text small {
  margin-top: 3px;
  font-family: var(--font-body);
  font-size: clamp(0.5rem, 2vw, 0.62rem);
  letter-spacing: 0.28em;
  color: var(--color-accent);
  text-transform: uppercase;
  white-space: nowrap;
}

.masthead__motto {
  display: none;
  writing-mode: vertical-rl;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.3em;
  color: var(--color-accent-light);
  border-inline-end: 1px solid rgba(201, 162, 39, 0.35);
  padding-inline-end: 10px;
  height: 58px;
  opacity: 0.85;
}

.masthead__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-bookmark {
  background: linear-gradient(135deg, var(--color-accent), #B18A1A);
  color: var(--color-primary-deep);
  box-shadow: 0 4px 16px rgba(201, 162, 39, 0.3);
  padding: 9px 13px;
  border-radius: var(--radius-pill);
}

.btn-bookmark:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 162, 39, 0.45);
}

.btn-bookmark__icon {
  font-size: 1rem;
  line-height: 1;
}

.btn-bookmark__text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.nav-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 1px solid rgba(230, 215, 167, 0.25);
  background: rgba(230, 215, 167, 0.08);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.nav-toggle:hover {
  background: rgba(230, 215, 167, 0.15);
  border-color: rgba(230, 215, 167, 0.4);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 18px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--color-accent-light);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle__label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: none;
  border-top: 1px solid rgba(201, 162, 39, 0.2);
  background: rgba(7, 26, 46, 0.6);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.site-nav[data-open="true"] {
  display: block;
  animation: nav-in 0.35s ease;
}

@keyframes nav-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-list {
  display: flex;
  flex-direction: column;
  padding: 6px 0 12px;
}

.nav-item + .nav-item {
  border-top: 1px solid rgba(234, 230, 223, 0.06);
}

.nav-link {
  display: block;
  padding: 13px 4px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: rgba(234, 230, 223, 0.82);
  border-bottom: 2px solid transparent;
  transition: color 0.25s ease, border-bottom-color 0.25s ease, background-color 0.25s ease;
}

.nav-link:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.04);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.header-progress {
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.09) 0 1px,
    transparent 1px 6px
  );
}

.header-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(90deg, var(--color-accent), #F0E6B8);
}

.site-footer {
  margin-top: 80px;
  color: rgba(234, 230, 223, 0.85);
  background:
    radial-gradient(ellipse at 15% 120%, rgba(58, 46, 88, 0.5), transparent 55%),
    linear-gradient(155deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
}

.site-footer a {
  transition: color 0.25s ease;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: clamp(48px, 7vw, 72px) 0 44px;
}

.footer-brand {
  position: relative;
}

.brand-link--footer {
  color: #FFFFFF;
}

.footer-brand__desc {
  margin-top: 20px;
  max-width: 30em;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(234, 230, 223, 0.68);
}

.footer-brand__note {
  position: absolute;
  top: 4px;
  right: 6px;
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: rgba(201, 162, 39, 0.55);
}

.footer-heading {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  padding-bottom: 12px;
  margin-bottom: 18px;
  position: relative;
}

.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

.footer-nav__list,
.footer-contact__list {
  display: flex;
  flex-direction: column;
  gap: 11px;
  list-style: none;
}

.footer-nav__list a,
.footer-contact__list a {
  font-size: 0.9rem;
  color: rgba(234, 230, 223, 0.78);
}

.footer-nav__list a:hover,
.footer-contact__list a:hover,
.footer-contact__list a:focus-visible {
  color: var(--color-accent);
}

.footer-contact__list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.875rem;
}

.footer-contact__label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: rgba(201, 162, 39, 0.75);
  text-transform: uppercase;
}

.footer-contact__address {
  color: rgba(234, 230, 223, 0.78);
  max-width: 20em;
  line-height: 1.6;
}

.footer-contact__note {
  margin-top: 20px;
  padding-left: 14px;
  border-left: 2px solid rgba(201, 162, 39, 0.4);
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(234, 230, 223, 0.55);
}

.footer-ruler {
  height: 8px;
  border-top: 1px solid rgba(201, 162, 39, 0.2);
  background: repeating-linear-gradient(
    90deg,
    rgba(201, 162, 39, 0.45) 0 1px,
    transparent 1px 8px
  );
}

.footer-bottom {
  padding: 18px 0;
}

.footer-bottom__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  justify-content: space-between;
  font-size: 0.78rem;
  color: rgba(234, 230, 223, 0.55);
}

.footer-bottom__icp {
  letter-spacing: 0.05em;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(7, 26, 46, 0.16);
  background: var(--color-bg);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  color: var(--color-text);
  transition: all 0.25s ease;
}

.filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-btn.is-active {
  background: linear-gradient(135deg, var(--color-accent), #B18A1A);
  border-color: transparent;
  color: var(--color-primary-deep);
  box-shadow: 0 4px 16px rgba(201, 162, 39, 0.35);
}

[data-filter-item].is-hidden {
  display: none;
}

[data-filter-item].is-appearing {
  animation: item-in 0.45s ease both;
}

@keyframes item-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (min-width: 768px) {
  #main-content {
    scroll-margin-top: 150px;
  }

  .masthead__motto {
    display: block;
  }

  .btn-bookmark {
    padding: 10px 22px;
  }

  .btn-bookmark__text {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip: auto;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: block;
    border-top: 1px solid rgba(201, 162, 39, 0.18);
    background: rgba(7, 26, 46, 0.25);
  }

  .site-nav[data-open="true"] {
    animation: none;
  }

  .nav-list {
    flex-direction: row;
    justify-content: center;
    gap: 4px;
    padding: 0;
  }

  .nav-item + .nav-item {
    border-top: none;
  }

  .nav-link {
    padding: 14px 18px;
    font-size: 0.9rem;
  }

  .nav-link:hover {
    background: transparent;
  }

  .footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
    gap: 44px;
  }

  .footer-bottom__inner {
    flex-direction: row;
  }

  .footer-ruler {
    height: 10px;
  }

  .grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .masthead__motto {
    font-size: 1.1rem;
    height: 64px;
  }

  .nav-list {
    gap: 10px;
  }

  .nav-link {
    padding: 14px 22px;
  }
}

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

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

  .js-enabled [data-reveal] {
    opacity: 1;
    transform: none;
  }

  [data-filter-item].is-appearing {
    animation: none;
  }

  .site-nav[data-open="true"] {
    animation: none;
  }

  .header-progress__bar {
    transition: none;
  }
}