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

:root {
  --cream: #F5F0E6;
  --deep-blue: #0B3C5D;
  --dark-brown: #2B1D14;
  --orange: #E85D04;
  --purple: #9B5DE5;
  --cyan: #00F5D4;
  --gold: #FFD700;
  --gray: #E0E0E0;
  --text-primary: #2B1D14;
  --text-muted: rgba(43, 29, 20, 0.68);
  --text-on-dark: #F5F0E6;
  --font-headline: "Orbitron", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", monospace;
  --container-max: 1440px;
  --radius: 24px;
  --radius-sm: 12px;
  --shadow-glass: 0 8px 32px rgba(11, 60, 93, 0.18);
  --transition-speed: 0.2s;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  background: var(--cream);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--deep-blue);
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 800;
  line-height: 1.25;
  color: var(--deep-blue);
}

::selection {
  background: var(--gold);
  color: var(--dark-brown);
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

#main-content {
  scroll-margin-top: 110px;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 20px;
  z-index: 5000;
  background: var(--deep-blue);
  color: var(--cream);
  padding: 12px 24px;
  border-radius: 0 0 14px 14px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(11, 60, 93, 0.25);
  transition: top var(--transition-speed) ease;
}

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

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

.section {
  padding: 80px 24px;
}

.section-title {
  font-size: 32px;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  position: relative;
  display: inline-block;
  color: var(--deep-blue);
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  height: 4px;
  width: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--orange), var(--purple), transparent);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 20px 0;
}

.breadcrumb a {
  color: var(--deep-blue);
  font-weight: 600;
}

.breadcrumb a:hover {
  color: var(--orange);
}

.breadcrumb-separator {
  color: rgba(43, 29, 20, 0.35);
}

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

.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-6 { grid-column: span 6; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }
.col-span-9 { grid-column: span 9; }
.col-span-10 { grid-column: span 10; }
.col-span-11 { grid-column: span 11; }
.col-span-12 { grid-column: span 12; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  border: 1px solid transparent;
  background: var(--orange);
  color: #fff;
  cursor: pointer;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, background var(--transition-speed) ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232, 93, 4, 0.35);
}

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

.btn-gold {
  background: linear-gradient(135deg, #FFD700, #E6B800);
  color: var(--dark-brown);
}

.btn-gold:hover {
  box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--deep-blue);
  color: var(--deep-blue);
}

.btn-outline:hover {
  background: var(--deep-blue);
  color: var(--cream);
  box-shadow: 0 8px 24px rgba(11, 60, 93, 0.2);
}

.glass-card {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(11, 60, 93, 0.14);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 6px 24px rgba(11, 60, 93, 0.08);
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(11, 60, 93, 0.14);
}

.panel {
  background: rgba(11, 60, 93, 0.04);
  border: 1px solid rgba(11, 60, 93, 0.1);
  border-radius: var(--radius-sm);
  padding: 24px;
}

.image-frame {
  position: relative;
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(11, 60, 93, 0.06), rgba(155, 93, 229, 0.12));
  border: 1px solid rgba(11, 60, 93, 0.1);
  aspect-ratio: 16 / 9;
  min-height: 160px;
}

.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame-wide {
  aspect-ratio: 21 / 9;
}

.image-frame-tall {
  aspect-ratio: 3 / 4;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 24px;
  background: rgba(11, 60, 93, 0.04);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--purple);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--deep-blue);
}

.stat-label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  background: rgba(155, 93, 229, 0.08);
  color: var(--purple);
  border: 1px solid rgba(155, 93, 229, 0.25);
}

.skew-accent {
  display: inline-block;
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  color: var(--deep-blue);
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transform: skewX(-8deg);
  border-radius: 4px;
}

.skew-accent > * {
  transform: skewX(8deg);
}

.divider {
  height: 1px;
  border: none;
  margin: 48px 0;
  background: linear-gradient(90deg, transparent, rgba(11, 60, 93, 0.3), transparent);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 24px 0;
  pointer-events: none;
  transition: padding var(--transition-speed) ease;
}

.site-header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px 10px 24px;
  background: rgba(11, 60, 93, 0.72);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border: 1px solid rgba(0, 245, 212, 0.2);
  border-radius: 999px;
  box-shadow: var(--shadow-glass);
  pointer-events: auto;
  transition: padding var(--transition-speed) ease, background var(--transition-speed) ease;
}

.site-header.is-scrolled {
  padding-top: 10px;
}

.site-header.is-scrolled .site-header-inner {
  padding-top: 6px;
  padding-bottom: 6px;
  background: rgba(11, 60, 93, 0.92);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.brand-text {
  font-family: var(--font-headline);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--gold);
  white-space: nowrap;
}

.brand-tagline {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(245, 240, 230, 0.72);
  padding-left: 14px;
  border-left: 1px solid rgba(0, 245, 212, 0.35);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: 8px 14px;
  color: rgba(245, 240, 230, 0.85);
  font-size: 14px;
  font-weight: 500;
  border-radius: 999px;
  white-space: nowrap;
  transition: color var(--transition-speed) ease, background var(--transition-speed) ease;
}

.nav-link:hover {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.1);
}

.nav-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.nav-link[aria-current="page"] {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255, 215, 0, 0.2);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 11px;
  background: rgba(245, 240, 230, 0.1);
  border: 1px solid rgba(0, 245, 212, 0.25);
  border-radius: 50%;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-speed) ease;
}

.nav-toggle:hover {
  background: rgba(245, 240, 230, 0.2);
}

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

.nav-toggle-bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--cream);
  width: 100%;
  transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
}

.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: 96px;
  padding: 72px 24px 28px;
  background: var(--deep-blue);
  color: rgba(245, 240, 230, 0.85);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -80px;
  width: 260px;
  height: 260px;
  background: linear-gradient(135deg, transparent 45%, rgba(155, 93, 229, 0.22) 100%);
  transform: rotate(12deg);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--purple), var(--cyan), var(--gold));
  opacity: 0.45;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr;
  gap: 48px;
  position: relative;
  z-index: 1;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-brand-name {
  font-family: var(--font-headline);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.footer-tagline {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: rgba(245, 240, 230, 0.55);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  font-weight: 500;
  color: rgba(245, 240, 230, 0.78);
  transition: color var(--transition-speed) ease;
  padding: 2px 0;
}

.footer-links a:hover {
  color: var(--gold);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact-email,
.footer-contact-phone {
  display: block;
  font-size: 14px;
  font-family: var(--font-mono);
  color: rgba(245, 240, 230, 0.72);
  letter-spacing: 0.02em;
}

.footer-bottom {
  max-width: var(--container-max);
  margin: 56px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(245, 240, 230, 0.14);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(245, 240, 230, 0.5);
  position: relative;
  z-index: 1;
}

.footer-copyright {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--purple), var(--cyan), var(--gold));
  z-index: 3000;
  pointer-events: none;
  border-radius: 0 3px 3px 0;
}

@media (max-width: 1100px) {
  .nav-link {
    padding: 8px 10px;
    font-size: 13px;
  }

  .brand-tagline {
    display: none;
  }

  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 16px;
  }

  .content-container {
    padding: 0 16px;
  }

  .grid {
    gap: 16px;
  }

  .col-span-2, .col-span-3, .col-span-4, .col-span-5, .col-span-6,
  .col-span-7, .col-span-8, .col-span-9, .col-span-10, .col-span-11,
  .col-span-12 {
    grid-column: span 12;
  }

  .site-header {
    padding: 10px 12px 0;
  }

  .site-header-inner {
    padding: 8px 8px 8px 16px;
    border-radius: 20px;
    gap: 8px;
  }

  .site-header.is-scrolled .site-header-inner {
    padding: 6px 6px 6px 14px;
  }

  .brand-text {
    font-size: 18px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    left: 12px;
    right: 12px;
    top: calc(100% + 10px);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(11, 60, 93, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 245, 212, 0.2);
    border-radius: 20px;
    padding: 12px;
    box-shadow: var(--shadow-glass);
    opacity: 0;
    transform: translateY(-10px);
    visibility: hidden;
    transition: opacity var(--transition-speed) ease, transform var(--transition-speed) ease, visibility var(--transition-speed) ease;
  }

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

  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: 12px;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    margin-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }
}