:root {
  --font-heading: 'Chakra Petch', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', monospace;

  --color-bg-deep: #0A1128;
  --color-bg-deep-2: #0B1D3A;
  --color-bg-light: #F2F6FA;
  --color-accent: #00FF88;
  --color-accent-orange: #FF6B35;
  --color-text-light: #E8F0F8;
  --color-text-dim: #A7B8C9;
  --color-border: #1F3A5F;
  --color-success: #00C853;
  --color-warning: #FFB300;
  --color-card: #0D1B2A;

  --header-offset: 96px;
  --container-max: 1200px;
  --radius-pill: 999px;
  --radius-card: 12px;
  --transition-fast: 0.2s ease;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 80px;
  --space-9: 120px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-light);
  background-color: var(--color-bg-deep);
  -webkit-font-smoothing: antialiased;
  padding-top: var(--header-offset);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(0, 255, 136, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 255, 136, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

#main-content {
  scroll-margin-top: var(--header-offset);
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--color-text-light);
}

h1 { font-size: clamp(42px, 6vw, 72px); }
h2 { font-size: clamp(30px, 4vw, 44px); }
h3 { font-size: clamp(22px, 2.6vw, 30px); }
h4 { font-size: 20px; }
h5 { font-size: 18px; }
h6 { font-size: 16px; }

p {
  margin-bottom: 1em;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), padding-left var(--transition-fast);
}

a:hover {
  color: #FFFFFF;
}

ul,
ol {
  list-style-position: inside;
}

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

.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;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 1002;
  background: var(--color-accent);
  color: var(--color-bg-deep);
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 14px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
  color: var(--color-bg-deep);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 14px 20px 0;
  pointer-events: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 70%, var(--color-accent-orange) 70%, var(--color-accent-orange) 100%);
  z-index: 1500;
  pointer-events: none;
  transition: width 0.08s linear;
}

.nav-pill {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--container-max);
  background: rgba(10, 17, 40, 0.84);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 10px 16px 10px 22px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.38);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.7);
}

.brand-type {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-light);
  line-height: 1;
}

.brand-mark {
  display: inline-block;
  font-style: italic;
  font-weight: 800;
  color: var(--color-accent);
  transform: skewX(-8deg);
  margin-right: 1px;
}

.nav-primary {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-dim);
  border-radius: 8px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.nav-list a:hover {
  color: var(--color-accent);
  background: rgba(0, 255, 136, 0.08);
}

.nav-list a[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(0, 255, 136, 0.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle:hover {
  border-color: var(--color-accent);
}

.toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.nav-toggle:hover .toggle-bar {
  background: var(--color-accent);
}

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

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

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

.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1200;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-bg-deep);
  border: none;
  border-radius: 10px;
  font-size: 22px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background-color var(--transition-fast);
  box-shadow: 0 4px 20px rgba(0, 255, 136, 0.3);
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--color-accent-orange);
  color: var(--color-bg-deep);
}

.site-footer {
  position: relative;
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
  padding: var(--space-7) 24px 0;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 38%, transparent 38%, transparent 62%, var(--color-accent-orange) 62%, var(--color-accent-orange) 100%);
}

.site-footer::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 180px;
  height: 5px;
  background: var(--color-accent);
  transform: skewX(-24deg);
  transform-origin: right bottom;
  opacity: 0.7;
}

.footer-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.7fr;
  gap: var(--space-6) 40px;
  padding-bottom: var(--space-6);
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.brand--footer .brand-type {
  font-size: 28px;
}

.brand--footer .brand-dot {
  width: 12px;
  height: 12px;
}

.footer-desc {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: 10px;
}

.footer-trust {
  font-size: 14px;
  color: var(--color-text-dim);
  line-height: 1.7;
  max-width: 360px;
}

.footer-col {
  padding-top: 8px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-light);
  margin-bottom: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-heading::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 2px;
  background: var(--color-accent);
}

.footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list a {
  color: var(--color-text-dim);
  font-size: 14px;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-list a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-contact .footer-list li {
  color: var(--color-text-dim);
  font-size: 14px;
  line-height: 1.7;
}

.footer-bottom {
  max-width: var(--container-max);
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  color: var(--color-text-dim);
  font-size: 13px;
}

.footer-bottom a {
  color: var(--color-text-dim);
}

.footer-bottom a:hover {
  color: var(--color-accent);
}

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

.section-light {
  background: var(--color-bg-light);
  color: #1C2B3A;
}

.section-light h1,
.section-light h2,
.section-light h3,
.section-light h4,
.section-light h5,
.section-light h6 {
  color: var(--color-bg-deep);
}

.section-light a {
  color: #007A4D;
}

.section-light a:hover {
  color: #005A38;
}

.section-light .section-label {
  color: #007A4D;
}

.section-light .section-label::before {
  background: #007A4D;
}

.section-light .data-card {
  background: #FFFFFF;
  box-shadow: 0 2px 20px rgba(10, 17, 40, 0.07);
}

.section-light .data-card:hover {
  border-color: #007A4D;
  box-shadow: 0 8px 32px rgba(10, 17, 40, 0.12);
}

.section-light .btn {
  color: var(--color-bg-deep);
  border-color: var(--color-bg-deep);
}

.section-light .btn:hover {
  background: rgba(10, 17, 40, 0.08);
  color: var(--color-bg-deep);
}

.section-light .btn--primary {
  background: #007A4D;
  border-color: #007A4D;
  color: #FFFFFF;
}

.section-light .btn--primary:hover {
  background: transparent;
  color: #007A4D;
}

.section-dark {
  background: var(--color-bg-deep);
  color: var(--color-text-light);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--color-accent);
}

.section-label--orange {
  color: var(--color-accent-orange);
}

.section-label--orange::before {
  background: var(--color-accent-orange);
}

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

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 28px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-light);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-deep);
  font-weight: 700;
}

.btn--primary:hover {
  background: transparent;
  color: var(--color-accent);
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.25);
}

.btn--orange {
  background: var(--color-accent-orange);
  border-color: var(--color-accent-orange);
  color: var(--color-bg-deep);
  font-weight: 700;
}

.btn--orange:hover {
  background: transparent;
  color: var(--color-accent-orange);
  box-shadow: 0 0 24px rgba(255, 107, 53, 0.25);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 4px 10px;
  color: var(--color-text-dim);
  background: transparent;
  white-space: nowrap;
}

.tag--accent {
  color: var(--color-accent);
  border-color: rgba(0, 255, 136, 0.4);
}

.tag--orange {
  color: var(--color-accent-orange);
  border-color: rgba(255, 107, 53, 0.4);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-dim);
  margin-bottom: var(--space-5);
}

.breadcrumb a {
  color: var(--color-text-dim);
}

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

.breadcrumb__sep {
  color: var(--color-border);
  font-family: var(--font-mono);
}

.data-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-5);
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 14px 40px rgba(0, 255, 136, 0.09);
}

.img-placeholder {
  position: relative;
  background: linear-gradient(135deg, var(--color-bg-deep-2) 0%, var(--color-bg-deep) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 136, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.06) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

@media (max-width: 960px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5) 32px;
  }

  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .site-header {
    padding-top: 12px;
  }

  .nav-pill {
    position: relative;
    flex-wrap: wrap;
    border-radius: 22px;
    padding: 12px 18px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-primary {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    display: none;
    background: rgba(10, 17, 40, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 14px;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5);
  }

  .nav-primary[data-open] {
    display: block;
  }

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

  .nav-list a {
    display: block;
    width: 100%;
    padding: 14px 18px;
    font-size: 16px;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5) 0;
  }

  .grid--4,
  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .site-header {
    padding-left: 12px;
    padding-right: 12px;
  }

  .nav-pill {
    padding: 10px 14px;
  }

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

  .back-top {
    right: 16px;
    bottom: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .data-card:hover,
  .back-top,
  .nav-toggle .toggle-bar {
    transform: none !important;
  }
}