:root {
  --color-navy: #0A1E3C;
  --color-navy-deep: #061426;
  --color-accent: #FF6B35;
  --color-gold: #FFD700;
  --color-paper: #F5F5F0;
  --color-line: #E0E0E0;
  --color-gray: #4A4A4A;
  --color-green: #00A86B;
  --color-red: #C0392B;
  --color-white: #FFFFFF;
  --font-sans: "Noto Sans SC", "PingFang TC", "Microsoft JhengHei", "Hiragino Sans GB", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shadow: 0 1px 0 rgba(10, 30, 60, 0.08), 0 8px 24px rgba(10, 30, 60, 0.08);
  --radius: 2px;
}

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

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

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-gray);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

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

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
blockquote {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

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

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@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;
  }
}

.site-container {
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

.main-content {
  min-height: 70vh;
  background: var(--color-paper);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: 200;
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  padding: 0.75rem 1.25rem;
}

.skip-link:focus {
  top: 0;
}

.site-header {
  position: relative;
  z-index: 20;
  background: var(--color-navy);
  color: var(--color-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.header-shell {
  position: relative;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
  padding-bottom: 0;
}

.header-masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  color: var(--color-white);
  text-decoration: none;
  line-height: 1.2;
}

.brand-mark {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--color-white);
}

.brand-mark::before {
  content: "";
  display: inline-block;
  width: 0.3em;
  height: 0.3em;
  margin-right: 0.16em;
  background: var(--color-accent);
  transform: translateY(-0.12em);
}

.brand-caption {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: var(--color-gold);
  border-left: 1px solid rgba(255, 255, 255, 0.35);
  padding-left: 0.6rem;
  white-space: nowrap;
}

.header-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.16);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 0 3px rgba(0, 168, 107, 0.24);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  color: var(--color-white);
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
}

.nav-toggle-box {
  position: relative;
  width: 22px;
  height: 14px;
}

.nav-toggle-box span {
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.nav-toggle-box span:nth-child(1) {
  top: 0;
}

.nav-toggle-box span:nth-child(2) {
  top: 6px;
}

.nav-toggle-box span:nth-child(3) {
  top: 12px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1) {
  top: 6px;
  transform: rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3) {
  top: 6px;
  transform: rotate(-45deg);
}

.primary-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.75rem 0 1rem;
}

.primary-nav a {
  position: relative;
  display: inline-block;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
}

.primary-nav a:hover {
  color: var(--color-white);
  background: rgba(255, 107, 53, 0.18);
}

.primary-nav a[aria-current="page"] {
  color: var(--color-white);
}

.primary-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.2rem;
  height: 2px;
  background: var(--color-accent);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  z-index: 5;
}

.section-block {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.section-kicker {
  display: block;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.6rem;
}

.section-title {
  margin: 0 0 0.6rem;
  font-size: clamp(1.7rem, 3.5vw, 2.9rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-navy);
}

.section-title--light {
  color: var(--color-white);
}

.page-intro {
  max-width: 60ch;
  font-size: 1.08rem;
  line-height: 1.75;
  color: var(--color-gray);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--color-accent);
  color: var(--color-white);
  border: 0;
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.04em;
  text-decoration: none;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s ease;
}

.btn:hover {
  background: #e85a24;
}

.btn--outline {
  background: transparent;
  color: var(--color-navy);
  border: 1px solid var(--color-navy);
}

.btn--outline:hover {
  background: rgba(10, 30, 60, 0.06);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--color-gold);
  background: rgba(255, 215, 0, 0.12);
  border: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: var(--radius);
  padding: 0.32rem 0.6rem;
}

.badge--update {
  color: var(--color-green);
  background: rgba(0, 168, 107, 0.12);
  border-color: rgba(0, 168, 107, 0.3);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--color-navy);
  background: rgba(10, 30, 60, 0.05);
  border-left: 2px solid var(--color-accent);
  padding: 0.3rem 0.55rem;
  border-radius: 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 1.5rem;
  font-size: 0.8rem;
  color: var(--color-gray);
}

.breadcrumb a {
  color: var(--color-navy);
  text-decoration: none;
  font-weight: 700;
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--color-line);
}

.ui-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 1.5rem);
}

.ui-span-3 {
  grid-column: span 3;
}

.ui-span-4 {
  grid-column: span 4;
}

.ui-span-6 {
  grid-column: span 6;
}

.ui-span-8 {
  grid-column: span 8;
}

.ui-span-12 {
  grid-column: 1 / -1;
}

.data-card {
  position: relative;
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: 0;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.data-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.85rem;
  margin-bottom: 0.85rem;
  border-bottom: 1px solid var(--color-line);
}

.data-card__value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-navy);
}

.data-card__meta {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-gray);
}

.data-card__body {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-gray);
}

.media-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-navy) 0%, #15335f 100%);
  border: 1px solid var(--color-line);
  color: rgba(255, 255, 255, 0.78);
}

.media-frame::before {
  content: attr(data-label);
  max-width: 90%;
  padding: 0.8rem 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  line-height: 1.5;
  text-align: center;
}

.media-frame--portrait {
  aspect-ratio: 4 / 5;
}

.media-frame--chart {
  background: linear-gradient(135deg, #10264a 0%, #1a3a63 100%);
}

.site-footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.8);
  border-top: 3px solid var(--color-accent);
}

.footer-shell {
  max-width: 1280px;
  margin-inline: auto;
  padding: clamp(2rem, 6vw, 4rem) clamp(1rem, 4vw, 3rem) 1.6rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
}

.footer-brand .brand {
  color: var(--color-white);
}

.footer-brand-text {
  max-width: 42ch;
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
}

.footer-heading {
  margin: 0 0 0.9rem;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.85rem;
}

.footer-links a,
.footer-contact a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  padding-bottom: 1px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--color-white);
  border-color: var(--color-accent);
}

.footer-contact p {
  margin: 0.15rem 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-contact a {
  word-break: break-all;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 1.3rem;
  font-size: 0.73rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom p {
  margin: 0;
}

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .ui-span-3,
  .ui-span-4,
  .ui-span-6,
  .ui-span-8 {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  html.js .nav-toggle {
    display: inline-flex;
  }

  .nav-toggle-text {
    display: none;
  }

  .primary-nav {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
    padding: 0.75rem 0 1rem;
  }

  .primary-nav a {
    text-align: center;
  }

  html.js .primary-nav {
    display: none;
  }

  html.js .primary-nav[data-open] {
    display: flex;
  }

  .header-masthead {
    flex-wrap: wrap;
    padding: 0.9rem 0 0.65rem;
  }

  .header-status {
    display: none;
  }
}

@media (max-width: 480px) {
  .brand-caption {
    font-size: 0.6rem;
  }
}