:root {
  --color-cream: #F7F3E8;
  --color-deep-blue: #0A1F3D;
  --color-dark-brown: #1E1C17;
  --color-red-orange: #E85D3A;
  --color-gold: #D4AF37;
  --color-emerald: #3A9D6E;
  --color-light-gray: #E5E0D5;
  --color-glass: rgba(255, 255, 255, 0.7);
  --header-height: 80px;
  --container-width: 1200px;
  --container-pad: 24px;
  --body-font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --display-font: 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --data-font: ui-monospace, 'Cascadia Code', 'JetBrains Mono', 'Consolas', monospace;
  --duration: 0.25s;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

@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;
  }
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }

ul[class], ol[class] { list-style: none; padding: 0; margin: 0; }

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

input, button, textarea, select { font: inherit; }

body {
  background-color: var(--color-cream);
  color: var(--color-dark-brown);
  font-family: var(--body-font);
  line-height: 1.6;
  font-size: 1rem;
  padding-top: var(--header-height);
}

::selection {
  background: var(--color-emerald);
  color: var(--color-cream);
}

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

.container {
  max-width: calc(var(--container-width) + 2 * var(--container-pad));
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -100px;
  background: var(--color-deep-blue);
  color: var(--color-cream);
  padding: 0.75rem 1.5rem;
  z-index: 1000;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
  transition: top 0.2s var(--ease);
}

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 0;
  border-radius: 0;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: var(--body-font);
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease), background-color var(--duration) var(--ease);
}

.btn--accent {
  position: relative;
  background-color: var(--color-red-orange);
  color: var(--color-cream);
  box-shadow: 0 2px 6px rgba(232, 93, 58, 0.3);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.btn--accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(232, 93, 58, 0.4);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-glass);
  color: var(--color-deep-blue);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.site-header[data-scrolled="true"] {
  background-color: var(--color-deep-blue);
  color: var(--color-cream);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold));
  transform: skewX(-20deg);
  transform-origin: right top;
  pointer-events: none;
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 100%;
}

.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex-shrink: 0;
  text-decoration: none;
  color: inherit;
  transition: color var(--duration) var(--ease);
}

.brand__name {
  font-family: var(--display-font);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  line-height: 1.1;
  position: relative;
  padding-left: 0.75rem;
}

.brand__name::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 0.5em;
  height: 0.5em;
  background: var(--color-gold);
  transform: rotate(45deg);
}

.brand__sub {
  font-family: var(--data-font);
  font-size: 0.625rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-top: 0.25rem;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.5rem 0;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: inherit;
  transition: color var(--duration) var(--ease);
}

.nav__index {
  font-family: var(--data-font);
  font-size: 0.675rem;
  color: var(--color-red-orange);
  letter-spacing: 0;
  transition: color var(--duration) var(--ease);
}

.site-header[data-scrolled="true"] .nav__index { color: var(--color-gold); }

.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-red-orange);
}

.site-header[data-scrolled="true"] .nav-link[aria-current="page"]::after { background: var(--color-gold); }

.header__cta {
  flex-shrink: 0;
  font-size: 0.85rem;
  padding: 0.5rem 1.25rem;
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 10;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: inherit;
}

.nav-toggle__label {
  font-family: var(--data-font);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s var(--ease);
}

.nav-toggle__icon {
  position: relative;
}

.nav-toggle__icon::before {
  position: absolute;
  top: -8px;
  left: 0;
}

.nav-toggle__icon::after {
  position: absolute;
  bottom: -8px;
  left: 0;
}

.header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-emerald));
  transition: background 0.2s var(--ease);
  pointer-events: none;
}

.site-footer {
  position: relative;
  background-color: var(--color-deep-blue);
  background-image:
    linear-gradient(45deg, rgba(212, 175, 55, 0.06) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(212, 175, 55, 0.06) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(212, 175, 55, 0.06) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(212, 175, 55, 0.06) 75%);
  background-size: 32px 32px;
  background-position: 0 0, 0 0, -16px 16px, 16px -16px;
  color: rgba(247, 243, 232, 0.9);
  font-size: 0.875rem;
  margin-top: 4rem;
}

.site-footer::before {
  content: '';
  display: block;
  height: 4px;
  background:
    linear-gradient(90deg, var(--color-gold) 0 25%, transparent 0 50%, var(--color-gold) 0 75%, transparent 0) repeat-x 0 0 / 32px 4px;
}

.footer__container {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 2.5rem;
  padding-block: 3rem 2rem;
}

.footer__brand,
.footer__nav,
.footer__contact {
  min-width: 0;
}

.footer__brand-name {
  font-family: var(--display-font);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--color-gold);
  letter-spacing: 0.05em;
}

.footer__about {
  margin-top: 1rem;
  max-width: 34ch;
  line-height: 1.7;
}

.footer__icp {
  margin-top: 1.5rem;
  font-family: var(--data-font);
  font-size: 0.75rem;
  color: rgba(247, 243, 232, 0.6);
}

.footer__heading {
  font-family: var(--data-font);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
}

.footer__list,
.footer__contact-list {
  display: grid;
  gap: 0.75rem;
}

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

.footer__link:hover { color: var(--color-gold); }

.footer__contact-list li {
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__contact-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.footer__legal {
  background: rgba(0, 0, 0, 0.3);
}

.footer__legal-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 1rem;
  font-size: 0.8125rem;
  color: rgba(247, 243, 232, 0.8);
}

.footer__copy {
  margin: 0;
}

.footer__legal-links {
  display: flex;
  gap: 1.5rem;
}

.page-title {
  font-family: var(--display-font);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  color: var(--color-deep-blue);
  letter-spacing: -0.02em;
}

.page-title::after {
  content: '';
  display: block;
  width: 64px;
  height: 6px;
  margin-top: 0.5rem;
  background: linear-gradient(90deg, var(--color-red-orange) 0 60%, var(--color-gold) 60%);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 0;
  font-size: 0.8125rem;
  color: var(--color-deep-blue);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb__item:not(:last-child)::after {
  content: '/';
  color: var(--color-red-orange);
}

.breadcrumb__link {
  text-decoration: none;
  color: inherit;
}

.breadcrumb__link[aria-current="page"] {
  color: var(--color-red-orange);
  font-weight: 600;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-light-gray);
  aspect-ratio: 16 / 9;
}

.frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 31, 61, 0.3) 0%, rgba(212, 175, 55, 0.15) 100%);
  mix-blend-mode: multiply;
  pointer-events: none;
}

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

.badge {
  display: inline-block;
  padding: 0.25em 0.75em;
  background: var(--color-emerald);
  color: var(--color-cream);
  font-family: var(--data-font);
  font-size: 0.75rem;
  border-radius: 999px;
}

@media (max-width: 1024px) {
  .site-header {
    background-color: var(--color-deep-blue);
    color: var(--color-cream);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header__cta {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-deep-blue);
    color: var(--color-cream);
    padding: 1.5rem var(--container-pad) 2rem;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    transform: translateY(-120%);
    visibility: hidden;
    transition: transform 0.3s var(--ease), visibility 0s linear 0.3s;
  }

  .site-nav[data-open] {
    transform: translateY(0);
    visibility: visible;
    transition-delay: 0s;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-link {
    padding: 1rem 0;
    font-size: 1rem;
    color: var(--color-cream);
  }

  .site-nav[data-open] .nav-link[aria-current="page"] {
    color: var(--color-gold);
  }

  .nav-link[aria-current="page"]::after {
    display: none;
  }

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

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

@media (max-width: 600px) {
  :root {
    --header-height: 68px;
  }

  .header__container {
    gap: 0.75rem;
  }

  .brand__name {
    font-size: 1.25rem;
  }

  .brand__sub {
    font-size: 0.5rem;
  }

  .footer__container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer__legal-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__legal-links {
    justify-content: center;
  }
}