:root {
  --c-white: #FFFFFF;
  --c-gold: #D4AF37;
  --c-navy: #1F3A93;
  --c-red: #E31B23;
  --c-lightgray: #F5F5F5;
  --c-gray: #999999;
  --c-dark: #1A1A1A;
  --c-black: #000000;
  --font-heading: 'Impact', 'Arial Black', sans-serif;
  --font-body: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --border-w: 3px;
  --shadow: 6px 6px 0 var(--c-black);
  --shadow-sm: 3px 3px 0 var(--c-black);
  --radius: 0px;
  --max-width: 1280px;
  --header-top: 10px;
  --transition-time: 0.2s;
}

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

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

body {
  background: var(--c-white);
  color: var(--c-dark);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  overflow-x: hidden;
}

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

a {
  color: var(--c-navy);
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.15em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  line-height: 1.1;
  margin: 0 0 0.5em;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

h3 {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
}

p {
  margin: 0 0 1em;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: fixed;
  left: 12px;
  top: -100px;
  background: var(--c-gold);
  color: var(--c-black);
  padding: 10px 18px;
  border: var(--border-w) solid var(--c-black);
  box-shadow: var(--shadow-sm);
  font-weight: 800;
  text-decoration: none;
  z-index: 1100;
  border-radius: 999px;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 12px;
}

.site-header {
  position: sticky;
  top: var(--header-top);
  z-index: 100;
  width: 100%;
  padding: 0 12px;
  margin-top: 6px;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: calc(var(--max-width) - 24px);
  margin: 0 auto;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.92);
  border: var(--border-w) solid var(--c-black);
  box-shadow: var(--shadow);
  border-radius: 999px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  background: var(--c-navy);
  color: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  border: 2px solid var(--c-black);
  box-shadow: 3px 3px 0 var(--c-gold);
  transform: rotate(-6deg);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 1.08rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.brand-text small {
  font-size: 0.68rem;
  color: var(--c-navy);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding: 8px 12px;
  text-decoration: none;
  color: var(--c-dark);
  font-weight: 700;
  font-size: 0.9rem;
  border: 2px solid transparent;
  border-radius: 999px;
  transition: background var(--transition-time) ease, border-color var(--transition-time) ease, color var(--transition-time) ease;
}

.nav-list a:hover {
  color: var(--c-navy);
  border-color: var(--c-gold);
  background: var(--c-lightgray);
}

.nav-list a:focus-visible {
  outline: 3px solid var(--c-red);
  outline-offset: 2px;
}

.nav-list a[aria-current="page"] {
  color: var(--c-white);
  background: var(--c-navy);
  border-color: var(--c-black);
  box-shadow: 3px 3px 0 var(--c-gold);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 10px 18px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
  border-radius: 999px;
  border: 2px solid var(--c-black);
  background: var(--c-white);
  color: var(--c-dark);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform var(--transition-time) ease, box-shadow var(--transition-time) ease, background var(--transition-time) ease, color var(--transition-time) ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--c-black);
}

.btn:focus-visible {
  outline: 3px solid var(--c-red);
  outline-offset: 2px;
}

.btn-download {
  background: var(--c-gold);
  border-width: 3px;
  color: var(--c-black);
  white-space: nowrap;
}

.btn-download:hover {
  background: var(--c-black);
  color: var(--c-gold);
  border-color: var(--c-gold);
  box-shadow: 5px 5px 0 var(--c-gold);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  background: var(--c-white);
  border: 2px solid var(--c-black);
  border-radius: 50%;
  box-shadow: 2px 2px 0 var(--c-black);
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  position: absolute;
  left: 11px;
  right: 11px;
  height: 3px;
  background: var(--c-black);
  border-radius: 3px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle span:nth-child(1) {
  top: 13px;
}

.nav-toggle span:nth-child(2) {
  top: 20px;
}

.nav-toggle span:nth-child(3) {
  top: 27px;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

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

.nav-toggle[aria-expanded="true"] {
  background: var(--c-gold);
}

.nav-toggle:focus-visible {
  outline: 3px solid var(--c-red);
  outline-offset: 2px;
}

.site-footer {
  background: var(--c-navy);
  color: var(--c-white);
  border-top: 4px solid var(--c-black);
  box-shadow: 0 -6px 0 var(--c-gold);
  margin-top: 64px;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-time) ease;
}

.site-footer a:hover {
  color: var(--c-gold);
  text-decoration: underline;
}

.site-footer a:focus-visible {
  outline: 3px solid var(--c-gold);
  outline-offset: 2px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 32px;
  padding: 48px 0;
}

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

.footer-brand .brand-text small {
  color: var(--c-gold);
}

.footer-brand .brand-mark {
  background: var(--c-black);
  color: var(--c-gold);
  border-color: var(--c-white);
  box-shadow: 3px 3px 0 var(--c-gold);
}

.footer-brand p {
  font-size: 0.95rem;
  max-width: 34ch;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.8);
}

.footer-grid h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  color: var(--c-gold);
  text-transform: uppercase;
}

.footer-nav ul,
.footer-legal ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav li,
.footer-legal li {
  margin-bottom: 8px;
}

.footer-contact p {
  margin-top: 8px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.85);
}

.footer-bottom {
  border-top: 2px solid rgba(255, 255, 255, 0.2);
  padding: 16px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

.footer-bottom p {
  margin: 0;
}

.footer-icp {
  margin-left: 4px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 5px;
  width: 0;
  background: var(--c-gold);
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.7);
  z-index: 2000;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0;
  font-size: 0.85rem;
  list-style: none;
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  color: var(--c-dark);
  font-weight: 800;
}

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

.prose {
  max-width: 72ch;
}

.prose h2 {
  margin-top: 2em;
}

.prose h3 {
  margin-top: 1.5em;
}

.prose p {
  margin-bottom: 1.2em;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2em 1.5em;
}

.prose blockquote {
  margin: 1.5em 0;
  padding: 1em 1.5em;
  background: var(--c-lightgray);
  border-left: 5px solid var(--c-gold);
  font-style: italic;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.bento-card {
  grid-column: span 4;
  border: var(--border-w) solid var(--c-black);
  box-shadow: var(--shadow);
  background: var(--c-white);
  padding: 24px;
  min-height: 160px;
}

.bento-card--gold {
  background: var(--c-gold);
  color: var(--c-black);
}

.bento-card--navy {
  background: var(--c-navy);
  color: var(--c-white);
}

.bento-card--dark {
  background: var(--c-dark);
  color: var(--c-white);
}

.image-frame {
  position: relative;
  display: block;
  border: var(--border-w) solid var(--c-black);
  box-shadow: var(--shadow);
  background: var(--c-lightgray);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(100%) contrast(1.15);
  transition: filter 0.3s ease, transform 0.3s ease;
}

.image-frame:hover img {
  filter: grayscale(0) contrast(1);
  transform: scale(1.02);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

@media (max-width: 992px) {
  .header-inner {
    border-radius: 24px;
  }

  .nav {
    position: absolute;
    top: calc(100% + 14px);
    left: 0;
    right: 0;
    display: none;
    margin-left: 0;
    background: var(--c-white);
    border: var(--border-w) solid var(--c-black);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: 16px;
  }

  .nav[data-open="true"] {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-list a {
    display: block;
    padding: 12px 16px;
    border-radius: 16px;
    border: 2px solid transparent;
  }

  .nav-list a[aria-current="page"] {
    border-color: var(--c-black);
  }

  .btn-download {
    margin-left: auto;
  }

  .nav-toggle {
    display: block;
  }

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

@media (max-width: 560px) {
  .brand-text small {
    display: none;
  }

  .brand-text strong {
    font-size: 0.95rem;
  }

  .btn-download {
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  .header-inner {
    gap: 8px;
    padding: 8px 10px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@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;
  }

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

  .scroll-progress {
    transition: none;
  }
}