:root {
  --font-body: 'Noto Sans SC', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  --color-deep: #0A1930;
  --color-red: #E8453C;
  --color-mango: #FFC300;
  --color-lime: #80B918;
  --color-cream: #FFF9ED;
  --color-terra: #D96C3F;
  --color-slate: #6B7280;
  --color-pine: #14342B;
  --color-float: #FFE8D6;
  --line-hair: rgba(255, 249, 237, 0.14);
  --shadow-hard: 8px 8px 0 var(--color-pine);
  --container-pad: clamp(16px, 4vw, 48px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--color-deep);
  color: var(--color-cream);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 4px 4px;
  pointer-events: none;
}

a {
  color: inherit;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

ul,
ol,
p,
h1,
h2,
h3 {
  margin-top: 0;
}

#main-content {
  scroll-margin-top: 120px;
}

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

.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 3000;
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0.5rem 1rem;
  background: var(--color-mango);
  color: var(--color-pine);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--color-red);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  color: var(--color-cream);
}

.header-announce {
  background: rgba(10, 25, 48, 0.86);
  border-bottom: 1px solid var(--line-hair);
  backdrop-filter: blur(12px);
}

.announce-inner {
  max-width: 1440px;
  margin-inline: auto;
  padding: 0.5rem clamp(16px, 4vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8125rem;
}

.announce-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.announce-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.25rem 0.625rem;
  color: var(--color-cream);
  text-decoration: none;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  border: 1px solid rgba(255, 249, 237, 0.22);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.announce-link:hover {
  border-color: var(--color-mango);
  color: var(--color-mango);
}

.header-main {
  position: relative;
  background: transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled .header-main {
  background: rgba(10, 25, 48, 0.96);
  border-bottom: 1px solid var(--line-hair);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}

.header-inner {
  max-width: 1440px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  padding: 0.375rem clamp(16px, 4vw, 48px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 48px;
  color: var(--color-cream);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-seal {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--color-red);
  color: #fff;
  font-weight: 900;
  font-size: 1.375rem;
  border: 2px solid var(--color-pine);
  border-radius: 12px 12px 12px 2px;
  box-shadow: 4px 4px 0 var(--color-mango);
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-lockup-line {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-pg {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--color-mango);
  border: 1px solid rgba(255, 195, 0, 0.35);
  padding: 0.0625rem 0.25rem;
}

.brand-sub {
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: rgba(255, 249, 237, 0.66);
  font-family: var(--font-mono);
}

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

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.125rem;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  color: rgba(255, 249, 237, 0.88);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  border: 2px solid transparent;
  border-radius: 2px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-list a:hover {
  color: var(--color-mango);
  background: rgba(255, 195, 0, 0.06);
  border-color: rgba(255, 195, 0, 0.35);
}

.nav-list a[aria-current="page"] {
  color: var(--color-pine);
  background: var(--color-mango);
  border-color: var(--color-mango);
  box-shadow: 4px 4px 0 var(--color-red);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

.nav-supplement {
  display: none;
}

.old-version-link {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.375rem 0.75rem;
  border: 1px solid rgba(255, 249, 237, 0.28);
  color: var(--color-cream);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.old-version-link::after {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 70%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 195, 0, 0.28), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}

.old-version-link:hover {
  border-color: rgba(255, 195, 0, 0.55);
  color: var(--color-mango);
}

.old-version-link:hover::after {
  left: 120%;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.25rem 0.5rem;
  border: 2px solid rgba(255, 249, 237, 0.24);
  border-radius: 2px;
  color: var(--color-cream);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 18px;
  height: 18px;
}

.nav-toggle-box span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.site-header[data-open] .nav-toggle-box span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-box span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.reading-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 4px;
  width: 0;
  background: linear-gradient(90deg, var(--color-red), var(--color-mango), var(--color-lime));
  box-shadow: 0 0 12px rgba(255, 195, 0, 0.45);
}

.status-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.status-dot-lime {
  background: var(--color-lime);
  box-shadow: 0 0 0 3px rgba(128, 185, 24, 0.18);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-dot-mango {
  background: var(--color-mango);
}

.status-dot-red {
  background: var(--color-red);
}

@keyframes pulse-dot {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(128, 185, 24, 0.35);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(128, 185, 24, 0);
  }
}

.container {
  width: min(1440px, calc(100% - 48px));
  margin-inline: auto;
}

.container-narrow {
  max-width: 820px;
}

.section {
  padding-block: clamp(4rem, 9vw, 6.5rem);
}

.surface-dark {
  background-color: var(--color-deep);
  color: var(--color-cream);
}

.surface-light {
  background-color: var(--color-cream);
  color: var(--color-pine);
}

.surface-light .section-lead {
  color: var(--color-slate);
}

.surface-light .breadcrumbs {
  color: var(--color-pine);
}

.surface-light .breadcrumbs a {
  color: var(--color-red);
}

.section-head {
  max-width: 860px;
  margin-bottom: 2.5rem;
}

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--color-red);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.section-lead {
  max-width: 70ch;
  font-size: 1.125rem;
  line-height: 1.8;
  color: inherit;
  opacity: 0.78;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  border: 2px solid var(--color-pine);
  border-radius: 2px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  background: var(--color-cream);
  color: var(--color-pine);
  box-shadow: 6px 6px 0 var(--color-pine);
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 4px 4px 0 var(--color-pine);
}

.btn:active {
  transform: translate(5px, 5px);
  box-shadow: none;
}

.btn-accent {
  background: var(--color-red);
  color: #fff;
  border-color: var(--color-pine);
  box-shadow: 6px 6px 0 var(--color-mango);
}

.btn-accent:hover {
  box-shadow: 4px 4px 0 var(--color-mango);
}

.btn-mango {
  background: var(--color-mango);
  color: var(--color-pine);
  border-color: var(--color-pine);
  box-shadow: 6px 6px 0 var(--color-red);
}

.btn-mango:hover {
  box-shadow: 4px 4px 0 var(--color-red);
}

.btn-small {
  min-height: 42px;
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card {
  background: var(--color-cream);
  color: var(--color-pine);
  border: 2px solid var(--color-pine);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
}

.info-card h3 {
  margin-top: 0.25rem;
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-float), var(--color-cream));
  border: 2px solid var(--color-pine);
  box-shadow: 8px 8px 0 var(--color-pine);
}

.media-frame::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -8%;
  right: -6%;
  width: 32%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: var(--color-red);
  opacity: 0.18;
}

.media-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--color-red), var(--color-mango), var(--color-lime));
}

.media-frame img,
.media-frame picture > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--color-pine);
  background: var(--color-float);
  color: var(--color-pine);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge-updated {
  background: var(--color-lime);
  color: var(--color-pine);
  border-color: var(--color-pine);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-cream);
  color: var(--color-pine);
  border: 2px solid var(--color-pine);
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(20, 52, 43, 0.18);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--color-deep);
  color: var(--color-cream);
  font-family: var(--font-mono);
  font-weight: 700;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  font-size: 0.875rem;
  color: var(--color-cream);
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-inline: 0.375rem;
  color: var(--color-slate);
}

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

.breadcrumbs a:hover {
  text-decoration: underline;
}

.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: var(--reveal-delay, 0s);
}

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

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--color-deep);
  color: var(--color-cream);
  border-top: 4px solid var(--color-red);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(224, 69, 60, 0.28), rgba(224, 69, 60, 0.05));
  border: 2px dashed rgba(255, 249, 237, 0.14);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 18%;
  left: 5%;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-mango);
  box-shadow: 44px 58px 0 var(--color-lime), 88px 10px 0 var(--color-terra);
  opacity: 0.4;
  pointer-events: none;
}

.footer-banner,
.footer-main {
  position: relative;
  z-index: 1;
}

.footer-banner {
  background: linear-gradient(120deg, rgba(224, 69, 60, 0.12), transparent 42%), rgba(10, 25, 48, 0.72);
  border-bottom: 1px solid var(--line-hair);
}

.footer-banner-inner {
  max-width: 1440px;
  margin-inline: auto;
  padding: 2rem clamp(16px, 4vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.footer-trust {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 70ch;
  margin: 0;
  font-size: 1rem;
}

.footer-trust p {
  margin: 0;
}

.trust-mark {
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--color-lime);
  color: var(--color-pine);
  font-weight: 900;
  border: 2px solid var(--color-pine);
  border-radius: 50%;
  box-shadow: 4px 4px 0 var(--color-mango);
}

.footer-main {
  max-width: 1440px;
  margin-inline: auto;
  padding: 3.5rem clamp(16px, 4vw, 48px) 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 2.5rem;
}

.footer-brand-name {
  margin: 0 0 1rem;
  display: flex;
  flex-direction: column;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.footer-brand-name span {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 249, 237, 0.65);
  letter-spacing: 0.04em;
}

.footer-status {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem 1.25rem;
  font-size: 0.8125rem;
  color: rgba(255, 249, 237, 0.72);
}

.footer-status li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

.footer-heading {
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line-hair);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-mango);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.625rem;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: rgba(255, 249, 237, 0.78);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-mango);
  padding-left: 0.25rem;
}

.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  font-size: 0.875rem;
  color: rgba(255, 249, 237, 0.78);
}

.footer-contact-list li {
  padding-left: 1rem;
  border-left: 2px solid var(--color-terra);
}

.contact-label {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-lime);
}

.footer-bottom {
  position: relative;
  z-index: 1;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-hair);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: rgba(255, 249, 237, 0.6);
}

.footer-bottom p {
  margin: 0;
}

@media (max-width: 1080px) {
  .header-actions {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 2100;
    display: block;
    max-height: calc(100vh - 116px);
    overflow: auto;
    padding: 1rem clamp(16px, 4vw, 48px) 1.5rem;
    background: rgba(10, 25, 48, 0.99);
    border-bottom: 4px solid var(--color-mango);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.3);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
  }

  .site-header[data-open] .site-nav {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .site-header[data-open] .header-main {
    background: var(--color-deep);
    border-bottom: 1px solid var(--line-hair);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.125rem;
  }

  .nav-list a {
    width: 100%;
    justify-content: flex-start;
    min-height: 48px;
  }

  .nav-list a[aria-current="page"] {
    box-shadow: none;
  }

  .nav-supplement {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--line-hair);
  }

  .nav-supplement .old-version-link,
  .nav-supplement .btn {
    width: 100%;
    justify-content: center;
  }

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

@media (max-width: 700px) {
  .announce-inner {
    justify-content: center;
  }

  .announce-link {
    display: none;
  }

  .brand-sub {
    display: none;
  }

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

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

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

@media (max-width: 480px) {
  .brand-seal {
    width: 38px;
    height: 38px;
    font-size: 1.125rem;
  }

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

  .header-inner {
    min-height: 64px;
  }
}

@media (min-width: 1081px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    background: transparent;
    padding: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    border: 0;
  }

  .nav-supplement {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

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