/* ============ CSS Variables ============ */
:root {
  --color-bg: #0A1F3C;
  --color-bg-secondary: #12325B;
  --color-accent-orange: #FF6B35;
  --color-accent-green: #39FF14;
  --color-text-light: #FFFFFF;
  --color-text-muted: #B0B8C4;
  --color-border: #2A3E5C;
  --color-neutral-dark: #1A1A1A;
  --color-neutral-light: #F5F5F5;
  --font-display: 'Anton', 'Impact', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --header-height: 72px;
  --container-max: 1280px;
  --transition-fast: 0.25s ease;
  --transition-slow: 0.5s ease;
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.3);
}

@media (max-width: 767px) {
  :root {
    --header-height: 60px;
  }
}

/* ============ Reset ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
}

/* ============ Typography ============ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.15;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 6rem);
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 2rem);
}

p {
  margin-bottom: 1rem;
}

::selection {
  background: var(--color-accent-orange);
  color: var(--color-neutral-dark);
}

/* ============ Container ============ */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

@media (max-width: 767px) {
  .container {
    padding-inline: 1rem;
  }
}

/* ============ Content Section ============ */
.content-section {
  padding-block: 4rem;
}

.content-section--light {
  background-color: var(--color-neutral-light);
  color: var(--color-neutral-dark);
}

@media (max-width: 767px) {
  .content-section {
    padding-block: 2.5rem;
  }
}

/* ============ Section Title ============ */
.section-title {
  margin-bottom: 2.5rem;
}

.section-title__kicker {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-orange);
  margin-bottom: 0.5rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--color-accent-green);
}

.section-title__headline {
  margin: 0;
  text-transform: uppercase;
}

.section-title--light .section-title__headline {
  color: var(--color-neutral-dark);
}

/* ============ Skip Link ============ */
.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 2000;
  background: var(--color-accent-orange);
  color: var(--color-neutral-dark);
  font-weight: 700;
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  transition: top 0.25s ease;
}

.skip-link:focus-visible {
  top: 0.75rem;
}

/* ============ Visually Hidden ============ */
.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;
}

/* ============ Header ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}

.site-header::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--color-accent-orange) 0%, var(--color-accent-green) 100%);
  z-index: 1;
  pointer-events: none;
}

.site-header.is-scrolled {
  background: rgba(10, 31, 60, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  position: relative;
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent-orange) 0%, var(--color-accent-green) 100%);
  z-index: 2;
  border-radius: 0 2px 2px 0;
}

/* ============ Logo ============ */
.site-header__logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.15rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-text-light);
  line-height: 1;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-header__logo-mark {
  color: var(--color-accent-orange);
}

.site-header__logo-text {
  color: var(--color-text-light);
}

/* ============ Navigation ============ */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: color 0.25s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.1rem;
  height: 2px;
  background: var(--color-accent-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-text-light);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent-green);
}

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--color-accent-green);
}

/* ============ Nav Toggle ============ */
.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
}

.site-nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.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;
  transform: scaleX(0);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ Mobile Nav ============ */
@media (max-width: 767px) {
  .site-nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(10, 31, 60, 0.98);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem 1.75rem;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
  }

  .site-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .site-nav__link {
    display: block;
    padding: 0.9rem 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 1.05rem;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(57, 255, 20, 0.08);
    padding-left: 0.75rem;
  }

  .site-nav__link::after {
    display: none;
  }
}

/* ============ Tablet Nav Adjust ============ */
@media (min-width: 768px) and (max-width: 1023px) {
  .site-nav__link {
    padding: 0.5rem 0.55rem;
    font-size: 0.85rem;
  }
}

/* ============ Footer ============ */
.site-footer {
  position: relative;
  background-color: var(--color-bg);
  color: var(--color-text-light);
  padding-top: 4rem;
  padding-bottom: 2rem;
  margin-top: 4rem;
  overflow: hidden;
}

.site-footer::after {
  content: '196';
  position: absolute;
  bottom: -3rem;
  right: -1rem;
  font-family: var(--font-display);
  font-size: 14rem;
  line-height: 1;
  color: rgba(255, 255, 255, 0.035);
  pointer-events: none;
  z-index: 0;
}

.site-footer__accent {
  position: absolute;
  top: 0;
  left: -2%;
  right: -2%;
  height: 8px;
  background: var(--color-accent-orange);
  transform: skewY(-1.2deg);
  transform-origin: left;
  z-index: 1;
}

.site-footer__accent::after {
  content: '';
  position: absolute;
  top: 0;
  left: 55%;
  right: -2%;
  height: 100%;
  background: var(--color-accent-green);
  transform: skewX(18deg);
  transform-origin: left;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.4fr;
  gap: 3rem;
  padding-top: 2.5rem;
  padding-bottom: 3rem;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.site-footer__tagline {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 22rem;
  margin: 0;
}

.site-footer__version {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-orange);
  background: rgba(255, 107, 53, 0.12);
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
  margin: 0;
}

.site-footer__nav ul {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 1rem;
  margin: 0;
}

.site-footer__nav a {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  transition: color 0.2s ease;
}

.site-footer__nav a:hover,
.site-footer__nav a:focus-visible {
  color: var(--color-accent-orange);
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent-green);
  display: inline-block;
}

.site-footer__contact p {
  margin-bottom: 0.45rem;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.site-footer__contact p:first-of-type {
  font-family: var(--font-body);
  color: var(--color-text-light);
  font-weight: 500;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.site-footer__copy {
  margin: 0;
}

.site-footer__legal {
  display: flex;
  gap: 1.25rem;
}

.site-footer__legal a {
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

.site-footer__legal a:hover,
.site-footer__legal a:focus-visible {
  color: var(--color-accent-green);
}

.site-footer__icp {
  margin: 0;
  letter-spacing: 0.04em;
}

@media (max-width: 767px) {
  .site-footer {
    padding-top: 3rem;
    margin-top: 2.5rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 1.5rem;
    padding-bottom: 2rem;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .site-footer__legal {
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
  }

  .site-footer::after {
    font-size: 8rem;
    bottom: -1rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-radius: 3px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  line-height: 1.4;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent-orange);
  color: var(--color-neutral-dark);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
  background: #FF7A4D;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-light);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-accent-green);
  color: var(--color-accent-green);
  transform: translateY(-2px);
}

@media (max-width: 767px) {
  .btn {
    padding: 0.7rem 1.25rem;
    font-size: 0.88rem;
  }
}

/* ============ Breadcrumb ============ */
.breadcrumb {
  margin-bottom: 2.5rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.breadcrumb__item:not(:last-child)::after {
  content: '/';
  color: var(--color-text-muted);
  margin-left: 0.25rem;
}

.breadcrumb__link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--color-accent-orange);
}

.breadcrumb__current {
  color: var(--color-text-light);
  font-weight: 600;
}

.content-section--light .breadcrumb__current {
  color: var(--color-neutral-dark);
}

/* ============ Grid System ============ */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.grid-12__col--span-3 {
  grid-column: span 3;
}

.grid-12__col--span-4 {
  grid-column: span 4;
}

.grid-12__col--span-6 {
  grid-column: span 6;
}

.grid-12__col--span-8 {
  grid-column: span 8;
}

.grid-12__col--span-12 {
  grid-column: span 12;
}

@media (max-width: 767px) {
  .grid-12 {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }

  .grid-12 > * {
    grid-column: 1 / -1;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .grid-12__col--span-3 {
    grid-column: span 6;
  }

  .grid-12__col--span-4 {
    grid-column: span 6;
  }
}

/* ============ Media Frames ============ */
.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
  min-height: 180px;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.media-frame--slant {
  clip-path: polygon(3% 0, 100% 0, 97% 100%, 0 100%);
}

.media-frame--ratio-16x9 {
  aspect-ratio: 16 / 9;
}

.media-frame--ratio-4x3 {
  aspect-ratio: 4 / 3;
}

.media-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0%, transparent 50%, rgba(57, 255, 20, 0.06) 100%);
  pointer-events: none;
}

@media (max-width: 767px) {
  .media-frame--slant {
    clip-path: none;
  }
}

/* ============ Reveal on Scroll ============ */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============ Focus Visible ============ */
:focus-visible {
  outline: 3px solid var(--color-accent-orange);
  outline-offset: 3px;
  border-radius: 2px;
}

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

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .site-header {
    transition: none;
  }
}