:root {
  --color-primary: #0A1F3D;
  --color-secondary: #1E3A6E;
  --color-accent: #FF6B2C;
  --color-gold: #FFC94D;
  --color-neutral: #F5F7FA;
  --color-gray: #B0BEC5;
  --color-text: #0A1F3D;
  --color-line: #2E4A7A;
  --font-heading: Impact, "Anton", "Arial Black", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-body: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", monospace;
  --container-max: 1320px;
  --container-gutter: clamp(1.25rem, 4vw, 3rem);
  --transition: 0.22s ease;
}

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

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-neutral);
  background-image:
    linear-gradient(rgba(30, 58, 110, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 110, 0.055) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.18;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}
h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p { margin-bottom: 1rem; }
ul, ol { padding-left: 1.25rem; }
a { color: inherit; }
a:hover, a:focus-visible { color: var(--color-accent); }
img, svg { display: block; max-width: 100%; height: auto; }

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

.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
}

.site-main {
  display: block;
  min-height: 60vh;
}

#main-content {
  scroll-margin-top: 2rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.site-skip {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 10003;
  padding: 0.75rem 1.25rem;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(10, 31, 61, 0.35);
}
.site-skip:focus {
  top: 1rem;
}

.site-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 10002;
  pointer-events: none;
  background: rgba(10, 31, 61, 0.08);
}
.site-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  transition: width 120ms linear;
}

.site-header {
  position: relative;
  background: var(--color-primary);
  color: var(--color-neutral);
  border-bottom: 1px solid var(--color-line);
}

.site-header__top {
  border-bottom: 1px solid rgba(46, 74, 122, 0.55);
}
.site-header__top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  min-height: 2.5rem;
}

.site-header__slogan {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(245, 247, 250, 0.72);
}
.site-header__slogan::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  flex-shrink: 0;
}

.quick-links {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}
.quick-links__item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.7rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-neutral);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}
.quick-links__item:hover,
.quick-links__item:focus-visible {
  color: var(--color-accent);
  background: rgba(255, 107, 44, 0.08);
}
.quick-links__icon {
  font-size: 1rem;
  line-height: 1;
  color: var(--color-accent);
}

.site-header__bottom {
  background: var(--color-primary);
}
.site-header__bottom-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 0.75rem;
}
.site-header__bottom::after {
  content: "";
  display: block;
  width: clamp(140px, 22%, 240px);
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-gold) 100%);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  line-height: 1;
}
.site-brand__mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-accent);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 900;
  line-height: 1;
  text-transform: uppercase;
  transform: skewX(-8deg);
  flex-shrink: 0;
}
.site-brand__mark::after {
  content: "";
  position: absolute;
  right: -3px;
  bottom: -3px;
  width: 5px;
  height: 5px;
  background: var(--color-gold);
}
.site-brand__name {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--color-neutral);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.site-brand--footer .site-brand__mark {
  width: 1.9rem;
  height: 1.9rem;
  font-size: 1.2rem;
}
.site-brand--footer .site-brand__name {
  font-size: 1.4rem;
}

.site-nav {
  display: flex;
  align-items: center;
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav__link {
  position: relative;
  display: block;
  padding: 0.55rem 0.9rem;
  color: var(--color-neutral);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.15rem;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-accent);
}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}
.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
}

.site-nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0 9px;
  background: transparent;
  border: 1px solid var(--color-line);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}
.site-nav__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-neutral);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-footer {
  margin-top: 5rem;
  background: var(--color-primary);
  color: var(--color-neutral);
  border-top: 4px solid var(--color-accent);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
  padding-block: 3.5rem 2.5rem;
}
.site-footer__brand {
  padding-right: 2rem;
}
.site-footer__section {
  min-width: 0;
}
.site-footer__meta {
  display: flex;
  flex-direction: column;
}
.site-footer__tagline {
  margin-top: 0.9rem;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: rgba(245, 247, 250, 0.78);
}
.site-footer__trust {
  margin-top: 0.5rem;
  max-width: 26rem;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-gray);
}
.site-footer__title {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-line);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.site-footer__list {
  display: grid;
  gap: 0.625rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
}
.site-footer__list a {
  display: inline-block;
  padding-left: 1.1rem;
  color: var(--color-neutral);
  text-decoration: none;
  transition: color var(--transition);
  position: relative;
}
.site-footer__list a::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}
.site-footer__list a:hover {
  color: var(--color-accent);
}
.site-footer__license,
.site-footer__copyright {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-gray);
}
.site-footer__license {
  margin-top: 1.25rem;
}
.site-footer__note {
  margin: 0;
  padding-block: 1.25rem;
  border-top: 1px solid var(--color-line);
  font-size: 0.8125rem;
  color: var(--color-gray);
  text-align: center;
}

.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  background: var(--color-accent);
  color: var(--color-primary);
  border: 2px solid var(--color-accent);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.site-btn:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-primary);
}
.site-btn--ghost {
  background: transparent;
  color: var(--color-neutral);
  border-color: var(--color-neutral);
}
.site-btn--ghost:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}
.site-btn--dark {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-neutral);
}
.site-btn--dark:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.site-breadcrumb {
  margin-bottom: 2.5rem;
  font-size: 0.8125rem;
}
.site-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
  gap: 0.35rem;
}
.site-breadcrumb__item {
  color: var(--color-gray);
}
.site-breadcrumb__item:not(:last-child)::after {
  content: "/";
  margin-left: 0.35rem;
  color: var(--color-line);
}
.site-breadcrumb__link {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.site-breadcrumb__link:hover {
  color: var(--color-accent);
}
.site-breadcrumb__item[aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}

.site-panel {
  position: relative;
  padding: 1.75rem;
  background: var(--color-secondary);
  border: 1px solid var(--color-line);
  border-radius: 0;
}
.site-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 34px;
  height: 4px;
  background: var(--color-accent);
}
.site-panel__title {
  margin-bottom: 0.75rem;
  color: var(--color-neutral);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.site-panel__body {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.85);
}

.site-data {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--color-gold);
}
.site-data__label {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.site-tag {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--color-accent);
  background: rgba(255, 107, 44, 0.1);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 0;
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 2.5vw, 2rem);
}
.site-grid__span-3 { grid-column: span 3; }
.site-grid__span-4 { grid-column: span 4; }
.site-grid__span-6 { grid-column: span 6; }
.site-grid__span-8 { grid-column: span 8; }
.site-grid__span-9 { grid-column: span 9; }
.site-grid__span-12 { grid-column: span 12; }

.section-title {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 0 1rem;
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-line);
}
.section-title__caption {
  padding-bottom: 0.4rem;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-visual {
  display: block;
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--color-secondary);
  border: 1px solid var(--color-line);
  border-radius: 0;
}
.site-visual::after {
  content: attr(data-visual-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0.75rem;
  border: 1px dashed rgba(245, 247, 250, 0.22);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(245, 247, 250, 0.35);
}
.site-visual--wide { aspect-ratio: 21 / 9; }
.site-visual--tall { aspect-ratio: 4 / 5; }
.site-visual img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.site-visual__caption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  padding: 0.5rem 0.875rem;
  background: rgba(10, 31, 61, 0.8);
  color: var(--color-neutral);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.vertical-text {
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.speed-line {
  display: block;
  height: 2px;
  border: 0;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}
[data-reveal="stagger"] > * {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease var(--stagger-delay, 0s), transform 0.55s ease var(--stagger-delay, 0s);
}
[data-reveal="stagger"].is-revealed > * {
  opacity: 1;
  transform: none;
}

@media (max-width: 64rem) {
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 90;
    display: block;
    background: var(--color-primary);
    border-top: 1px solid var(--color-line);
    box-shadow: 0 16px 24px rgba(10, 31, 61, 0.4);
    padding: 0.75rem;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s linear 0.25s;
  }
  .site-nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__item {
    border-bottom: 1px solid rgba(46, 74, 122, 0.5);
  }
  .site-nav__item:last-child {
    border-bottom: 0;
  }
  .site-nav__link {
    padding: 0.875rem 0.75rem;
    font-size: 1rem;
  }
  .site-nav__link::after {
    display: none;
  }
  .site-nav__toggle {
    display: flex;
  }
  .site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(2) {
    opacity: 0;
  }
  .site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding-block: 2.75rem 2rem;
  }
}

@media (max-width: 48rem) {
  .site-grid__span-3,
  .site-grid__span-4,
  .site-grid__span-6,
  .site-grid__span-8,
  .site-grid__span-9,
  .site-grid__span-12 {
    grid-column: span 12;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 2.25rem;
    padding-block: 2.5rem 1.75rem;
  }
  .site-footer__brand {
    padding-right: 0;
  }

  .site-brand__mark {
    width: 1.85rem;
    height: 1.85rem;
    font-size: 1.15rem;
  }
  .site-brand__name {
    font-size: 1.35rem;
  }

  .quick-links__item {
    padding: 0.25rem 0.45rem;
    font-size: 0.75rem;
  }
  .site-header__slogan {
    font-size: 0.6875rem;
  }
}

@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;
    transition-delay: 0s !important;
  }
  [data-reveal],
  [data-reveal="stagger"] > * {
    opacity: 1 !important;
    transform: none !important;
  }
}