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

:root {
  --color-bg: #0B1B3A;
  --color-bg-secondary: #102A4C;
  --color-accent: #FF6B35;
  --color-accent-alt: #39FF14;
  --color-neutral: #8A9BA8;
  --color-muted: #7A8450;
  --color-text: #FDF6E3;
  --color-terra: #C96F4A;
  --font-headline: 'Impact', 'Arial Black', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --container-max: 1200px;
  --header-h: 74px;
  --radius: 2px;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

p { margin: 0 0 1em; }

ul, ol { margin: 0; padding-left: 1.2rem; }

a { color: var(--color-accent-alt); }

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

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section { padding-block: 4rem; }
.section-secondary { background: var(--color-bg-secondary); }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
  padding: 0.75rem 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-neutral);
}
.breadcrumb a { color: var(--color-accent-alt); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-accent); }

.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(12, 1fr);
}
.grid-cell { grid-column: span 6; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem;
  background: transparent;
  border: 2px solid transparent;
  font-family: var(--font-body);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s, background 0.2s, border-color 0.2s, transform 0.2s;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  transform: skewX(-8deg);
  border-radius: var(--radius);
}
.btn-primary:hover {
  background: #FF8550;
  transform: skewX(-8deg) translateY(-2px);
}

.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  z-index: 2000;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 700;
  transform: translateY(-300%);
  transition: transform 0.2s;
}
.skip-link:focus-visible { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 27, 58, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--color-accent-alt);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 100%, 0 100%);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  width: 0%;
  background: var(--color-accent);
  z-index: 3;
  transition: width 0.1s linear;
}

.header-inner {
  position: relative;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 0.75rem 1.5rem;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text);
  text-decoration: none;
}
.brand:hover .brand-mark { background: var(--color-accent-alt); }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.1rem;
  transform: skewX(-10deg);
  transition: background 0.2s;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name {
  font-family: var(--font-headline);
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.brand-name-en {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.24em;
  color: var(--color-accent);
}

.site-nav { margin-left: auto; }

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  counter-reset: nav-index;
}
.nav-item { counter-increment: nav-index; }
.nav-item .nav-link::before {
  content: "0" counter(nav-index) " /";
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  margin-right: 0.35rem;
}
.nav-link {
  display: block;
  padding: 0.45rem 0.7rem;
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.4;
  letter-spacing: 0.04em;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.nav-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.nav-link[aria-current="page"] {
  color: var(--color-accent-alt);
  border-color: var(--color-accent-alt);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--color-neutral);
  padding: 0.3rem 0.6rem;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.nav-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-accent-alt);
  color: var(--color-accent-alt);
}
.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 1.2rem;
  height: 1rem;
}
.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
}

.header-cta { margin-left: 0.25rem; }

.site-footer {
  position: relative;
  background: var(--color-bg-secondary);
  border-top: 3px solid var(--color-accent);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 140px;
  background: repeating-linear-gradient(135deg, transparent 0 14px, rgba(57, 255, 20, 0.12) 14px 16px);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0 100%);
}
.site-footer::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 4px;
  width: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0 30%, var(--color-accent-alt) 30% 60%, var(--color-neutral) 60% 100%);
}
.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr 1.2fr;
  gap: 2rem;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 3rem 1.5rem 2.5rem;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.footer-tagline {
  margin: 0;
  color: var(--color-neutral);
  font-size: 0.85rem;
}
.footer-links,
.footer-contact,
.footer-legal {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-heading {
  margin-bottom: 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid rgba(138, 155, 168, 0.3);
  font-family: var(--font-headline);
  font-size: 1rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}
.footer-nav-list,
.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.footer-link,
.footer-contact-item {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: color 0.2s;
}
.footer-link:hover,
.footer-contact-item:hover {
  color: var(--color-accent-alt);
}
.footer-contact-item { display: block; }
.footer-legal-text {
  margin: 0.2rem 0;
  color: var(--color-neutral);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
.footer-legal-text a {
  color: var(--color-accent-alt);
  text-decoration: none;
}

.media-panel {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-secondary);
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
}
.media-panel img,
.media-panel video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 27, 58, 0.35), transparent 60%);
  pointer-events: none;
}
.media-panel--landscape { aspect-ratio: 16 / 9; }
.media-panel--portrait { aspect-ratio: 4 / 5; }
.media-panel--free { aspect-ratio: auto; min-height: 240px; }

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 960px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .nav-link { padding: 0.4rem 0.5rem; }
  .header-cta { padding: 0.4rem 0.9rem; }
}

@media (max-width: 680px) {
  .site-header {
    clip-path: none;
  }
  .header-inner {
    padding: 0.6rem 1rem;
  }
  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    padding: 0.5rem 1rem 1rem;
    background: var(--color-bg-secondary);
    border-bottom: 3px solid var(--color-accent);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.25);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .site-nav[data-open] { display: block; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }
  .nav-link {
    border-bottom: 1px solid rgba(138, 155, 168, 0.2);
  }
  .header-cta { margin-left: 0.5rem; }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 2.5rem 1rem 2rem;
  }
  .grid-cell { grid-column: span 12; }
  .section { padding-block: 3rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}