:root {
  --color-primary: #004D40;
  --color-primary-dark: #00352C;
  --color-gold: #C9A227;
  --color-gold-dark: #B08F1F;
  --color-accent: #FF6D00;
  --color-accent-dark: #E86100;
  --color-bg: #F5F5F5;
  --color-dark: #0A1A1A;
  --color-cyan: #00ACC1;
  --color-border: #D0D0D0;
  --color-text: #1A1A1A;
  --color-text-secondary: #4A4A4A;
  --color-white: #FFFFFF;
  --font-display: Impact, "Arial Narrow Bold", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  --header-rail-width: 88px;
  --header-bar-height: 56px;
  --container-main: 1200px;
  --page-gutter: 32px;
  --transition-base: 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-medium: 300ms cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
}

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

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

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

.skip-link {
  position: fixed;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 12px 24px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
}

.header-bar {
  position: absolute;
  top: 0;
  left: var(--header-rail-width);
  right: 0;
  height: var(--header-bar-height);
  background: rgba(245, 245, 245, 0.88);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 32px;
  pointer-events: auto;
  z-index: 3;
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 100%;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 5;
  pointer-events: none;
}

.header-brand {
  display: none;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--color-white);
  margin-right: auto;
}

.header-brand-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-style: italic;
  letter-spacing: 0.03em;
  line-height: 1;
}

.header-brand-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  opacity: 0.6;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
}

.header-update {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.header-update-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  position: relative;
}

.header-search {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  padding: 6px 14px;
  border: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base), color var(--transition-base);
}

.header-search-icon {
  font-size: 18px;
  line-height: 1;
}

.header-search:hover {
  border-color: var(--color-primary);
  border-radius: 2px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  flex-direction: column;
  width: 48px;
  height: 48px;
  justify-content: center;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle-line:nth-child(2) {
  width: 14px;
  align-self: flex-end;
  margin-right: 6px;
}

.nav-toggle-label {
  font-size: 10px;
  color: var(--color-white);
  letter-spacing: 0.12em;
  margin-top: 2px;
}

.site-nav {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--header-rail-width);
  background: var(--color-primary);
  pointer-events: auto;
  z-index: 2;
  overflow: visible;
}

.site-nav::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-gold) 0%, var(--color-accent) 100%);
  opacity: 0.35;
  z-index: 2;
}

.site-nav-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 0 0;
}

.site-nav-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  margin-bottom: 40px;
}

.site-nav-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-gold);
  color: var(--color-dark);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 24px;
  clip-path: polygon(0 0, 100% 0, 100% 80%, 80% 100%, 0 100%);
}

.site-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 100%;
}

.site-nav-item {
  width: 100%;
}

.site-nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 6px 12px;
  text-decoration: none;
  transition: background var(--transition-base);
}

.site-nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) scaleY(0);
  width: 3px;
  height: 28px;
  background: var(--color-gold);
  transition: transform var(--transition-base);
  z-index: 1;
}

.site-nav-link:hover {
  background: rgba(0, 0, 0, 0.15);
}

.site-nav-link:hover::before {
  transform: translateY(-50%) scaleY(1);
}

.site-nav-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--transition-base);
}

.site-nav-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition-base);
}

.site-nav-link[aria-current="page"] {
  background: rgba(255, 255, 255, 0.06);
}

.site-nav-link[aria-current="page"]::before {
  transform: translateY(-50%) scaleY(1);
}

.site-nav-link[aria-current="page"] .site-nav-num {
  color: var(--color-gold);
}

.site-nav-link[aria-current="page"] .site-nav-label {
  color: var(--color-gold);
}

.site-nav-foot {
  margin-top: auto;
  width: 100%;
  padding: 20px 0 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  position: relative;
}

.site-nav-foot::before {
  content: "";
  position: absolute;
  top: -8px;
  left: -12px;
  right: -12px;
  height: 8px;
  background: var(--color-gold);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  opacity: 0.8;
}

.site-nav-foot-week {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.2em;
  transform: rotate(-90deg) translateX(-24px);
  margin-bottom: 4px;
}

.site-nav-foot-text {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  letter-spacing: 0.1em;
  line-height: 1.6;
}

.nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-medium), visibility var(--transition-medium);
  z-index: 1;
  pointer-events: auto;
}

body.nav-open .nav-backdrop {
  opacity: 1;
  visibility: visible;
}

.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  margin-left: 0;
}

.footer-main {
  max-width: var(--container-main);
  margin: 0 auto;
  padding: 64px var(--page-gutter) 32px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
  gap: 48px;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-gold);
  color: var(--color-dark);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 20px;
  clip-path: polygon(0 0, 100% 0, 100% 80%, 80% 100%, 0 100%);
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 28px;
  font-style: italic;
  letter-spacing: 0.04em;
  color: var(--color-white);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 280px;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--color-gold);
  margin-bottom: 16px;
  text-transform: uppercase;
  position: relative;
  padding-bottom: 8px;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--color-gold);
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.footer-nav a:hover {
  color: var(--color-gold);
  padding-left: 6px;
}

.footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 15px;
  line-height: 1.6;
}

.footer-contact-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-right: 10px;
  text-transform: uppercase;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px var(--page-gutter) 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 16px 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-copy {
  font-family: var(--font-mono);
}

.footer-icp {
  font-family: var(--font-mono);
}

.footer-note {
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
}

.container {
  width: min(var(--container-main), 100% - var(--page-gutter) * 2);
  margin-inline: auto;
}

.entry-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px var(--page-gutter) 80px;
  font-size: 17px;
  line-height: 1.9;
}

.entry-content h1,
.entry-content h2,
.entry-content h3 {
  font-family: var(--font-display);
  font-style: italic;
  text-transform: uppercase;
  color: var(--color-primary);
  line-height: 1.1;
  margin: 2em 0 0.5em;
}

.entry-content h1 {
  font-size: clamp(36px, 6vw, 56px);
}

.entry-content h2 {
  font-size: clamp(28px, 4vw, 40px);
}

.entry-content h3 {
  font-size: clamp(22px, 3vw, 28px);
}

.entry-content p {
  margin-bottom: 1.4em;
}

.entry-content a {
  color: var(--color-cyan);
}

.entry-content ul,
.entry-content ol {
  margin-bottom: 1.4em;
  padding-left: 1.4em;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 8px;
  padding: 16px var(--page-gutter) 0;
  max-width: var(--container-main);
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--color-text-secondary);
  margin-right: 8px;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

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

.breadcrumb [aria-current="page"] {
  color: var(--color-text-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  position: relative;
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
}

.btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-dark);
}

.btn--gold:hover {
  background: var(--color-gold-dark);
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn--accent:hover {
  background: var(--color-accent-dark);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.header-progress,
[data-scroll-progress] {
  transform-origin: left center;
}

@media (min-width: 1024px) {
  body {
    margin-left: var(--header-rail-width);
    margin-top: var(--header-bar-height);
  }
}

@media (max-width: 1023px) {
  body {
    margin-top: 64px;
  }

  .site-header {
    position: fixed;
    inset: 0;
  }

  .header-bar {
    left: 0;
    right: 0;
    top: 0;
    height: 64px;
    background: var(--color-primary);
    border-bottom: none;
    padding: 0 20px;
    z-index: 12;
  }

  .header-progress {
    bottom: 0;
  }

  .header-brand {
    display: flex;
  }

  .header-update {
    display: none;
  }

  .header-search {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    width: min(320px, 82vw);
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-medium);
    z-index: 11;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
  }

  .site-nav[data-open="true"],
  .site-nav.is-open {
    transform: translateX(0);
  }

  .site-nav-inner {
    padding-top: 24px;
  }

  .site-nav::before {
    right: auto;
    left: 0;
    background: linear-gradient(to bottom, var(--color-gold), var(--color-accent));
    width: 3px;
  }

  .site-nav-list {
    align-items: flex-start;
    padding: 0 16px;
  }

  .site-nav-link {
    flex-direction: row;
    justify-content: flex-start;
    gap: 16px;
    padding: 14px 16px;
  }

  .site-nav-link::before {
    left: -16px;
  }

  .site-nav-num {
    font-size: 12px;
  }

  .site-nav-label {
    font-size: 17px;
  }

  .site-nav-foot {
    padding: 24px 16px;
  }

  .site-nav-foot-week {
    transform: none;
    margin-bottom: 2px;
  }

  .nav-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 48px 20px 24px;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-note {
    order: 4;
  }
}

@media (max-width: 560px) {
  :root {
    --page-gutter: 20px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .header-bar {
    padding: 0 14px;
  }

  .header-brand-name {
    font-size: 19px;
  }
}

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

  .skip-link {
    transition: none;
  }

  .site-nav {
    transition: none;
  }
}