:root {
  --cream: #F5F0E6;
  --ink: #2B2B2B;
  --accent-red: #C84C2E;
  --accent-gold: #D9A441;
  --sky-blue: #3B7DD8;
  --snow: #FFFFFF;
  --clay: #8C5B45;
  --stone: #7A7A72;
  --paper-line: #E3DAC9;
  --content-max: 80rem;
  --font-body: "Noto Sans CJK SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-heading: "Noto Sans CJK SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Courier New", Courier, monospace;
  --font-hand: "Handlee", "Bradley Hand", "Comic Sans MS", cursive;
}

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

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, figure, blockquote, dl, dd {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding-left: 1.25rem;
}

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

a {
  color: var(--sky-blue);
}

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

:focus-visible {
  outline: 3px solid var(--accent-gold);
  outline-offset: 2px;
}

.wrap {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

.grid-split {
  display: grid;
  grid-template-columns: minmax(0, 2.5fr) minmax(0, 9.5fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1.5rem;
}

.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-red);
  margin-bottom: 0.625rem;
}

.kicker::before {
  content: "// ";
  color: var(--accent-gold);
}

.section-head {
  margin-bottom: 2.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.875rem, 4vw, 3rem);
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.lead {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--stone);
  max-width: 42em;
  margin-top: 0.875rem;
}

.index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.index-list li {
  display: grid;
  grid-template-columns: minmax(2.75rem, auto) 1fr;
  gap: 1rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--paper-line);
}

.index-list li:last-child {
  border-bottom: 0;
}

.index-list .index-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-gold);
  letter-spacing: 0.08em;
  padding-top: 0.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.375rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  border: 2px solid var(--accent-red);
  background: var(--accent-red);
  color: var(--snow);
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

.btn:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--cream);
}

.btn-ghost {
  background: transparent;
  color: var(--accent-red);
}

.btn-ghost:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: var(--snow);
}

.panel {
  background: var(--snow);
  border: 1px solid var(--paper-line);
  border-left: 0.25rem solid var(--clay);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.panel-red {
  border-left-color: var(--accent-red);
}

.panel-gold {
  border-left-color: var(--accent-gold);
}

.panel-blue {
  border-left-color: var(--sky-blue);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--clay);
  border: 1px solid var(--clay);
  padding: 0.25rem 0.625rem;
  text-transform: uppercase;
}

.tag-red {
  color: var(--accent-red);
  border-color: var(--accent-red);
}

.tag-gold {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.tag-blue {
  color: var(--sky-blue);
  border-color: var(--sky-blue);
}

.divider,
.divider-gold {
  border: 0;
  height: 1px;
  background: var(--paper-line);
  margin: 2rem 0;
}

.divider-gold {
  height: 3px;
  background: linear-gradient(90deg, var(--accent-gold) 0 6rem, var(--paper-line) 6rem);
}

.mountain-rule,
.mountain-rule-light {
  height: 2rem;
  background-repeat: no-repeat;
  background-position: left center, center center, right center;
  background-size: 33.333% 100%;
  border: 0;
}

.mountain-rule {
  background-image:
    linear-gradient(135deg, transparent 0 46%, var(--accent-gold) 46% 51%, transparent 51%),
    linear-gradient(45deg, transparent 0 49%, var(--accent-red) 49% 54%, transparent 54%),
    linear-gradient(135deg, transparent 0 47%, var(--clay) 47% 52%, transparent 52%);
}

.mountain-rule-light {
  background-image:
    linear-gradient(135deg, transparent 0 46%, rgba(245, 240, 230, 0.5) 46% 51%, transparent 51%),
    linear-gradient(45deg, transparent 0 49%, rgba(245, 240, 230, 0.65) 49% 54%, transparent 54%),
    linear-gradient(135deg, transparent 0 47%, rgba(245, 240, 230, 0.45) 47% 52%, transparent 52%);
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--paper-line);
  border: 1px solid var(--clay);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.media-frame:hover img {
  transform: scale(1.02);
}

.media-frame-16x9 {
  aspect-ratio: 16 / 9;
}

.media-frame-4x3 {
  aspect-ratio: 4 / 3;
}

.media-frame-21x9 {
  aspect-ratio: 21 / 9;
}

.media-frame-1x1 {
  aspect-ratio: 1 / 1;
}

.figure-caption {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--stone);
}

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-bottom: 2rem;
  color: var(--stone);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.375rem;
  color: var(--clay);
  opacity: 0.55;
}

.breadcrumbs a {
  color: var(--clay);
  text-decoration: none;
}

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

.breadcrumbs [aria-current="page"] {
  color: var(--ink);
}

.site-header {
  position: relative;
  background: var(--cream);
  border-bottom: 2px solid var(--clay);
}

.skip-link {
  position: absolute;
  top: 0;
  left: 1rem;
  z-index: 1000;
  transform: translateY(-320%);
  background: var(--ink);
  color: var(--cream);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: transform 0.2s;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 1500;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-gold));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

.masthead {
  position: relative;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 1.125rem clamp(1.25rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  flex: none;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.25rem;
  background: var(--accent-red);
  color: var(--snow);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1;
  transition: background-color 0.2s;
}

.brand-text {
  display: inline-flex;
  flex-direction: column;
}

.brand-name {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.375rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  line-height: 1.2;
  transition: color 0.2s;
}

.brand-sub {
  display: block;
  font-family: var(--font-hand);
  font-size: 0.75rem;
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--clay);
  margin-top: 0.125rem;
}

.brand-link:hover .brand-mark {
  background: var(--ink);
}

.brand-link:hover .brand-name {
  color: var(--accent-red);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.375rem;
  padding: 0.5rem 0.625rem;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}

.nav-link::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0;
  color: var(--accent-gold);
  transform: translateY(-1px);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.625rem;
  right: 0.625rem;
  bottom: 0.25rem;
  height: 2px;
  background: var(--accent-red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s;
}

.nav-link:hover {
  color: var(--accent-red);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

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

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4375rem 0.75rem;
  background: transparent;
  border: 2px solid var(--ink);
  border-radius: 0;
  color: var(--ink);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background-color 0.2s;
}

.nav-toggle:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  gap: 0.4375rem;
  width: 1.5rem;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  transform: translateY(-9px) rotate(-45deg);
}

.nav-toggle-text {
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

.masthead-meta {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 0.625rem clamp(1.25rem, 4vw, 3rem) 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  border-top: 1px solid var(--paper-line);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.meta-item::before {
  content: "";
  width: 0.375rem;
  height: 0.375rem;
  flex: none;
  background: var(--accent-red);
}

.meta-loc::before {
  background: var(--accent-red);
}

.meta-edition::before {
  background: var(--accent-gold);
}

.meta-hours::before {
  background: var(--sky-blue);
}

.site-footer {
  position: relative;
  background: var(--ink);
  color: var(--cream);
}

.site-footer::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-red) 0 18rem, var(--accent-gold) 18rem 21rem, transparent 21rem);
}

.footer-grid {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 3.25rem clamp(1.25rem, 4vw, 3rem) 2.75rem;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 2.5fr) minmax(0, 4fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}

.footer-brand {
  min-width: 0;
}

.footer-brand .mountain-rule-light {
  margin: 1.125rem 0;
}

.footer-brand-name {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  line-height: 1.3;
  color: var(--snow);
  text-decoration: none;
}

.footer-brand-name::before {
  content: "四";
  display: grid;
  place-items: center;
  width: 2.125rem;
  height: 2.125rem;
  border-radius: 0.25rem;
  background: var(--accent-red);
  color: var(--snow);
  font-size: 1rem;
  line-height: 1;
}

.footer-brand-name:hover {
  color: var(--accent-gold);
}

.footer-tagline {
  max-width: 34em;
  margin-top: 0.875rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.75);
}

.footer-meta {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-gold);
}

.footer-col,
.footer-col-links,
.footer-col-contact {
  min-width: 0;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-gold);
  padding-bottom: 0.5rem;
  margin-bottom: 0.875rem;
  border-bottom: 1px solid rgba(245, 240, 230, 0.2);
}

.footer-col a {
  display: block;
  width: fit-content;
  padding: 0.3rem 0;
  font-size: 0.9375rem;
  color: rgba(245, 240, 230, 0.8);
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover {
  color: var(--accent-gold);
  padding-left: 0.375rem;
}

.contact-email,
.contact-phone,
.contact-address,
.contact-hours {
  display: block;
  color: rgba(245, 240, 230, 0.8);
  font-size: 0.875rem;
  line-height: 1.7;
}

.contact-email {
  font-family: var(--font-mono);
}

.contact-hours {
  margin-top: 0.625rem;
  color: rgba(245, 240, 230, 0.5);
}

.footer-bottom {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 1.125rem clamp(1.25rem, 4vw, 3rem) 1.375rem;
  border-top: 1px solid rgba(245, 240, 230, 0.18);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: rgba(245, 240, 230, 0.5);
}

.footer-copy,
.footer-icp {
  margin: 0;
}

.back-to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 900;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  border: 2px solid var(--accent-gold);
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1;
  letter-spacing: 0.1em;
  cursor: pointer;
  opacity: 0;
  transform: translateY(0.75rem);
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s, background-color 0.2s, color 0.2s;
}

.back-to-top::before {
  content: "↑";
  font-size: 1rem;
  line-height: 1;
}

.back-to-top:hover {
  background: var(--accent-gold);
  color: var(--ink);
}

.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

@media (max-width: 1100px) {
  .meta-hours {
    display: none;
  }
}

@media (max-width: 1000px) {
  .grid-split {
    grid-template-columns: 1fr;
  }

  .grid-12 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 500;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 0.5rem clamp(1.25rem, 4vw, 3rem) 0.75rem;
    background: var(--cream);
    border-bottom: 2px solid var(--clay);
    box-shadow: 0 16px 24px -18px rgba(43, 43, 43, 0.35);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-0.375rem);
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  }

  .site-nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-link {
    justify-content: flex-start;
    padding: 0.875rem 0.625rem;
    border-left: 3px solid transparent;
    font-size: 1rem;
    width: 100%;
  }

  .nav-link::after {
    display: none;
  }

  .site-nav .nav-link + .nav-link {
    border-top: 1px solid var(--paper-line);
  }

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

@media (max-width: 640px) {
  .masthead {
    padding-top: 0.875rem;
    padding-bottom: 0.875rem;
  }

  .brand-mark {
    width: 2.125rem;
    height: 2.125rem;
    font-size: 1rem;
  }

  .brand-name {
    font-size: 1.125rem;
  }

  .brand-sub {
    display: none;
  }

  .meta-edition {
    display: none;
  }

  .grid-12 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    padding-top: 2.5rem;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}