:root {
  --color-deep-green: #0B3D2E;
  --color-gold: #D4AF37;
  --color-dark-red: #8B1A1A;
  --color-cream: #F5F1E8;
  --color-ink: #1A1A1A;
  --color-white: #FFFFFF;
  --color-gray-green: #7AA68C;
  --color-copper: #B87333;
  --color-tan: #4A2C17;
  --color-light-gold: #F2E3A0;

  --font-display: "Oswald", "Impact", "Noto Sans SC", sans-serif;
  --font-body: "Georgia", "Noto Serif SC", serif;
  --font-mono: "Inconsolata", "Courier New", monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  --header-height: auto;
  --content-max: 1200px;
  --radius: 4px;
  --ease: 0.2s;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-ink);
  background-color: var(--color-cream);
  background-image:
    linear-gradient(rgba(245, 241, 232, 0.96), rgba(245, 241, 232, 0.96)),
    repeating-linear-gradient(45deg, rgba(11, 61, 46, 0.08) 0, rgba(11, 61, 46, 0.08) 1px, transparent 1px, transparent 12px);
  min-height: 100vh;
}

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

a {
  color: var(--color-deep-green);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;
  transition: color var(--ease), background-color var(--ease), border-color var(--ease);
}

a:hover {
  color: var(--color-dark-red);
}

ul, ol {
  padding-left: 1.4em;
}

button {
  font-family: inherit;
  cursor: pointer;
}

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

.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-deep-green);
  color: var(--color-cream);
  padding: 0.75rem 1rem;
  z-index: 1001;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-decoration: none;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--color-deep-green);
  color: var(--color-cream);
  border-bottom: 4px solid var(--color-gold);
  box-shadow: 0 4px 18px rgba(11, 61, 46, 0.25);
}

.header-inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 1.2rem var(--space-lg) 0.6rem;
}

.brand-lockup {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
}

.brand-home {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-cream);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
  color: var(--color-gold);
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.2);
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--color-gray-green);
}

.header-note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-light-gold);
  background: rgba(139, 26, 26, 0.85);
  border-radius: 999px;
  padding: 0.2rem 0.85rem;
  border: 1px solid var(--color-dark-red);
  max-width: 100%;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-gold);
  border-radius: var(--radius);
  padding: 0.55rem 0.6rem;
  line-height: 0;
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gold);
  margin: 5px 0;
  transition: transform var(--ease), opacity var(--ease);
}

.masthead-nav {
  margin-top: 0.65rem;
  border-top: 1px solid rgba(122, 166, 140, 0.3);
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
  overflow-x: auto;
}

.nav-link {
  display: block;
  padding: 0.7rem 1.15rem 0.5rem;
  color: var(--color-cream);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.04em;
  border-bottom: 3px solid transparent;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-gold);
  background: rgba(212, 175, 55, 0.12);
  border-bottom-color: var(--color-gold);
}

.nav-link[aria-current="page"] {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
  background: linear-gradient(to top, rgba(212, 175, 55, 0.2), transparent 85%);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-gold), var(--color-copper));
  z-index: 200;
  opacity: 0;
  transition: opacity 0.2s;
}

.scroll-progress.is-visible {
  opacity: 1;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-deep-green);
  color: var(--color-cream);
  margin-top: var(--space-xl);
  border-top: 6px solid var(--color-gold);
  position: relative;
  font-size: 0.95rem;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(90deg, var(--color-gold) 0 8px, var(--color-copper) 8px 10px);
  opacity: 0.35;
}

.footer-inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
}

.footer-brand-lockup {
  display: flex;
  flex-direction: column;
}

.footer-brand-lockup .brand-name {
  font-size: 2rem;
}

.footer-brand-lockup .brand-tagline {
  margin-top: 0.25rem;
}

.footer-trust {
  margin-top: var(--space-md);
  font-size: 0.95rem;
  line-height: 1.7;
  color: #C9D9CF;
  border-left: 3px solid var(--color-gold);
  padding-left: var(--space-md);
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.05em;
  color: var(--color-gold);
  margin: 0 0 var(--space-sm);
  font-weight: 600;
  text-transform: uppercase;
}

.footer-list,
.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.footer-list a,
.footer-contact-list a {
  color: var(--color-cream);
  text-decoration: none;
}

.footer-list a:hover,
.footer-contact-list a:hover {
  color: var(--color-gold);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.footer-contact-list li {
  color: var(--color-cream);
  display: flex;
  gap: 0.4rem;
  align-items: baseline;
}

.footer-note {
  margin-top: var(--space-md);
  font-size: 0.85rem;
  color: var(--color-gray-green);
  border-top: 1px solid rgba(122, 166, 140, 0.3);
  padding-top: var(--space-sm);
}

.footer-meta {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(212, 175, 55, 0.3);
  padding-top: var(--space-md);
  margin-top: var(--space-sm);
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-gray-green);
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--color-deep-green);
  color: var(--color-gold);
  border: 2px solid var(--color-gold);
  font-size: 1.4rem;
  line-height: 1;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--ease), transform var(--ease), background-color var(--ease);
  box-shadow: 0 4px 12px rgba(11, 61, 46, 0.35);
  z-index: 150;
}

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

.back-top:hover,
.back-top:focus-visible {
  background: var(--color-gold);
  color: var(--color-deep-green);
}

/* 图像/卡片基础组件 */
.figure-frame {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-deep-green);
  padding: 0.35rem;
  box-shadow: 0 2px 8px rgba(26, 26, 26, 0.08);
}

.figure-frame::after {
  content: "";
  display: block;
  padding-top: 100%; /* 默认方形 */
}

.figure-frame.ratio-16x9::after {
  padding-top: 56.25%;
}

.figure-frame.ratio-4x3::after {
  padding-top: 75%;
}

.figure-frame.is-sepia {
  background: var(--color-tan);
  filter: sepia(0.55) contrast(1.05) brightness(1.02);
}

.figure-frame .figure-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-gray-green);
  background:
    repeating-linear-gradient(45deg, rgba(11, 61, 46, 0.04) 0 8px, transparent 8px 16px),
    var(--color-white);
}

.big-number {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--color-deep-green);
  letter-spacing: 0.02em;
}

.big-number.highlight-gold {
  color: var(--color-gold);
  -webkit-text-stroke: 1px var(--color-deep-green);
}

.archive-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--color-light-gold);
  color: var(--color-deep-green);
  border: 1px solid var(--color-gold);
  border-radius: 2px 8px 2px 8px;
  padding: 0.2rem 0.6rem;
  margin-right: 0.5rem;
  margin-bottom: 0.35rem;
  white-space: nowrap;
}

.archive-tag.alert {
  background: var(--color-dark-red);
  color: var(--color-cream);
  border-color: var(--color-dark-red);
}

/* 通用按钮 */
.btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: background-color var(--ease), border-color var(--ease), color var(--ease), box-shadow var(--ease);
}

.btn-gold {
  background: var(--color-gold);
  color: var(--color-deep-green);
  border-color: var(--color-gold);
  font-weight: 700;
}

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

.btn-outline {
  background: transparent;
  color: var(--color-deep-green);
  border-color: var(--color-deep-green);
}

.btn-outline:hover {
  background: var(--color-deep-green);
  color: var(--color-cream);
}

/* 通用表格数据 */
.table-score {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  border-collapse: collapse;
}

.table-score th,
.table-score td {
  padding: 0.5rem 0.85rem;
  border-bottom: 1px solid var(--color-gray-green);
}

.table-score thead th {
  background: var(--color-deep-green);
  color: var(--color-gold);
  font-weight: 600;
  text-transform: uppercase;
}

.table-score tbody tr:nth-child(even) {
  background: var(--color-light-gold);
}

.table-score .score-em {
  color: var(--color-dark-red);
  font-weight: 700;
}

/* 分屏布局基础 */
.split-screen {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

/* 响应式 */
@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 0.9rem var(--space-md) 0.4rem;
  }

  .nav-toggle {
    display: inline-block;
    margin-left: auto;
  }

  .brand-lockup {
    align-items: center;
  }

  .header-note {
    display: none;
  }

  .masthead-nav {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s ease, border-color 0.3s ease;
    border-top-color: transparent;
  }

  .masthead-nav > .nav-list {
    overflow: hidden;
    visibility: hidden;
  }

  .masthead-nav[data-open="true"] {
    grid-template-rows: 1fr;
    border-top-color: rgba(122, 166, 140, 0.3);
  }

  .masthead-nav[data-open="true"] > .nav-list {
    visibility: visible;
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    padding: 0.4rem 0.5rem 0.5rem;
    gap: 0.1rem;
  }

  .nav-link {
    padding: 0.7rem 0.8rem;
    border-left: 3px solid transparent;
    border-bottom: 1px solid rgba(122, 166, 140, 0.2);
  }

  .nav-link:hover,
  .nav-link[aria-current="page"] {
    border-left-color: var(--color-gold);
    border-bottom-color: transparent;
    background: rgba(212, 175, 55, 0.15);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-md) var(--space-md);
  }

  .footer-meta {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .split-screen {
    grid-template-columns: 1fr;
  }
}

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

  .nav-toggle-line {
    transition: none;
  }
}