:root {
  --bg-deep: #0A0E27;
  --bg-secondary: #101637;
  --bg-card: rgba(21, 29, 66, 0.72);
  --accent-orange: #FF6B35;
  --accent-green: #39FF14;
  --accent-cyan: #00C2FF;
  --text-primary: #E6E9F0;
  --text-secondary: #8A93B8;
  --border-subtle: #1E2A5A;
  --border-glow: rgba(0, 194, 255, 0.25);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
  --font-display: "Archivo Black", "Arial Black", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Menlo", "Consolas", monospace;
  --container-max: 1280px;
  --header-h: 72px;
  --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 320ms cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --safe-bottom: env(safe-area-inset-bottom);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
}

body {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(circle at 85% 10%, rgba(0, 194, 255, 0.08), transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(57, 255, 20, 0.05), transparent 30%),
    linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-secondary) 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

ul,
ol {
  list-style: none;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 1000;
  padding: 12px 24px;
  background: var(--accent-cyan);
  color: var(--bg-deep);
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
}

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

.progress-read {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 1100;
  pointer-events: none;
}

.progress-read span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-orange), var(--accent-green));
  box-shadow: 0 0 12px var(--accent-cyan);
  transition: width 80ms linear;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.header-top-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: var(--header-h);
  gap: 16px;
}

.brand-group {
  justify-self: start;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  position: relative;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-cyan) 100%);
  border-radius: 10px;
  box-shadow: 0 0 24px rgba(0, 194, 255, 0.35);
  letter-spacing: -0.5px;
}

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

.brand-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.5px;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  background: rgba(21, 29, 66, 0.6);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: 40px;
  letter-spacing: 0.5px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 12px var(--accent-green);
  animation: pulse-dot 2s infinite;
}

.status-divider {
  width: 1px;
  height: 12px;
  background: var(--border-subtle);
  margin: 0 4px;
}

.status-time {
  font-variant-numeric: tabular-nums;
  color: var(--accent-cyan);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 194, 255, 0.1);
  transform: translateY(-1px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-orange) 0%, #e4532a 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 107, 53, 0.35);
}

.btn-accent:hover {
  box-shadow: 0 6px 28px rgba(255, 107, 53, 0.55);
  transform: translateY(-2px);
  background: linear-gradient(135deg, #ff7b4d 0%, #f55e32 100%);
}

.btn-icon {
  font-size: 16px;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translate(2px, -2px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  align-items: center;
  background: rgba(21, 29, 66, 0.6);
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.nav-toggle.is-open .nav-toggle-line:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle-line:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

.main-nav {
  border-top: 1px solid var(--border-subtle);
  background: rgba(10, 14, 39, 0.6);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 10px 18px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 6px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-cyan));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(21, 29, 66, 0.6);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--accent-orange);
}

.nav-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 14px;
  border: 1px solid var(--border-subtle);
  border-radius: 40px;
  background: rgba(0, 0, 0, 0.2);
}

.indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.site-footer {
  position: relative;
  margin-top: 96px;
  background: var(--bg-deep);
  border-top: 1px solid var(--border-subtle);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-orange), transparent);
}

.site-footer::after {
  content: "";
  position: absolute;
  bottom: -200px;
  left: -200px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 194, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 48px;
}

.footer-brand .brand-link {
  margin-bottom: 20px;
}

.footer-brand .brand-mark {
  width: 48px;
  height: 48px;
  font-size: 20px;
}

.footer-about {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 16px;
  max-width: 360px;
}

.footer-trust {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 420px;
  line-height: 1.8;
  border-left: 2px solid var(--accent-green);
  padding-left: 16px;
}

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

.footer-nav a,
.footer-contact a {
  font-size: 15px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  display: inline-block;
}

.footer-nav a::before,
.footer-contact a::before {
  content: "/";
  color: var(--accent-orange);
  margin-right: 8px;
  opacity: 0.6;
}

.footer-nav a:hover,
.footer-contact a:hover {
  color: var(--accent-cyan);
}

.footer-heading {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-orange);
}

.footer-contact li {
  font-size: 15px;
  color: var(--text-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.3);
  padding-top: 20px;
  padding-bottom: calc(20px + var(--safe-bottom));
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  color: var(--text-secondary);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-orange));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md);
}

.card:hover::before {
  opacity: 1;
}

.section-header {
  margin-bottom: 40px;
  max-width: 720px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 16px 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 32px;
}

.breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.breadcrumb a:not(:last-child)::after {
  content: "/";
  color: var(--border-subtle);
}

.img-container {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(21, 29, 66, 0.9) 0%, rgba(10, 14, 39, 0.4) 100%);
  border: 1px solid var(--border-subtle);
}

.img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-container::before {
  content: "IMG";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--border-subtle);
  letter-spacing: 4px;
}

.img-container::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.2;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

[data-reveal][data-delay="100"] {
  transition-delay: 100ms;
}

[data-reveal][data-delay="200"] {
  transition-delay: 200ms;
}

[data-reveal][data-delay="300"] {
  transition-delay: 300ms;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 40px;
  border: 1px solid var(--border-subtle);
  background: rgba(21, 29, 66, 0.6);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.status-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.path-tree {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.path-tree [data-step] {
  position: relative;
  padding-left: 32px;
  padding-bottom: 32px;
  border-left: 2px solid var(--border-subtle);
}

.path-tree [data-step]::before {
  content: attr(data-step);
  position: absolute;
  left: -12px;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--accent-cyan);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-cyan);
}

.path-tree [data-step]:last-child {
  border-left-color: transparent;
}

@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

@media (max-width: 1024px) {
  .header-top-row {
    grid-template-columns: 1fr auto;
  }

  .header-status {
    display: none;
  }

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

  .nav-indicator {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(16, 22, 55, 0.98);
    backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg);
    padding: 16px 0;
  }

  .main-nav.is-open {
    display: block;
  }

  .nav-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

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

  .nav-link {
    display: block;
    padding: 14px 16px;
    font-size: 16px;
  }

  .header-top-row {
    min-height: 64px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-subtitle {
    font-size: 10px;
  }

  .btn-label {
    display: none;
  }

  .btn-accent {
    width: 44px;
    height: 44px;
    padding: 0;
    font-size: 20px;
  }

  .btn-icon {
    font-size: 20px;
  }

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

  .footer-bottom-inner {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }

  .section-title {
    font-size: 32px;
  }

  .card {
    padding: 20px;
  }
}

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

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