:root {
  --bg-primary: #0A1A2F;
  --bg-secondary: #112A44;
  --bg-gradient: linear-gradient(135deg, #1E3A5A 0%, #0A1A2F 50%, #123A45 100%);
  --accent-orange: #F26522;
  --accent-cyan: #2ED6B4;
  --text-primary: #E9EDF2;
  --text-secondary: #9AAEC2;
  --border-color: #2C4C66;
  --font-headline: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", monospace;
  --container: 1440px;
  --transition: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image: linear-gradient(180deg, var(--bg-primary) 0%, #0D2036 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content {
  outline: none;
  scroll-margin-top: 24px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: 0.01em;
}

h2 {
  font-size: clamp(24px, 3.5vw, 36px);
}

h3 {
  font-size: clamp(20px, 2.5vw, 26px);
}

h4 {
  font-size: 18px;
}

p {
  margin-bottom: 16px;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
}

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

ul,
ol {
  padding-left: 1.2em;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding: 56px 0;
}

.section-narrow {
  padding: 40px 0;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 12px;
  z-index: 400;
  background: var(--accent-orange);
  color: #ffffff;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  transition: top var(--transition);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 300;
  pointer-events: none;
  background: rgba(46, 214, 180, 0.12);
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), #7FE8D4);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 80ms linear;
}

.site-header {
  position: relative;
  z-index: 100;
  background: rgba(10, 26, 47, 0.92);
  border-bottom: 1px solid var(--border-color);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--accent-orange) 0%,
    var(--accent-orange) 18%,
    var(--accent-cyan) 18%,
    var(--accent-cyan) 36%,
    transparent 36%,
    transparent 64%,
    var(--border-color) 64%,
    var(--border-color) 100%
  );
  z-index: 1;
}

.header-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 100px 14px 64px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-color);
  background: linear-gradient(135deg, rgba(30, 58, 90, 0.6), rgba(18, 58, 69, 0.4));
}

.brand-dot {
  position: absolute;
  top: 5px;
  left: 5px;
  width: 7px;
  height: 7px;
  background: var(--accent-orange);
}

.brand-line {
  position: absolute;
  bottom: 5px;
  right: 5px;
  width: 16px;
  height: 16px;
  border-right: 2px solid var(--accent-cyan);
  border-bottom: 2px solid var(--accent-cyan);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-name {
  font-size: 24px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  white-space: nowrap;
}

.brand-tag {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--text-secondary);
  white-space: nowrap;
}

.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 190;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 8px 24px 16px;
  display: block;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  box-shadow: 0 24px 40px rgba(0, 0, 0, 0.35);
}

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

.site-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 2px;
  border-bottom: 1px solid rgba(44, 76, 102, 0.6);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition), background var(--transition);
}

.site-nav a:last-child {
  border-bottom: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent-cyan);
}

.site-nav a[aria-current="page"] {
  color: var(--accent-cyan);
}

.site-nav a[aria-current="page"] .nav-index {
  color: var(--accent-cyan);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  color: var(--text-secondary);
  min-width: 18px;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 230;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 8px 9px;
  cursor: pointer;
  color: var(--text-primary);
  line-height: 1;
}

.nav-toggle-box {
  display: block;
  width: 16px;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--accent-cyan);
  margin: 3px 0;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.helpdesk-link {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 210;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--accent-orange);
  border: 1px solid var(--accent-orange);
  color: #ffffff;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
  box-shadow: 0 0 0 0 rgba(242, 101, 34, 0);
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition);
}

.helpdesk-link::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
}

.helpdesk-link:hover,
.helpdesk-link:focus-visible {
  background: #E05A1B;
  border-color: #E05A1B;
  color: #ffffff;
  box-shadow: 0 0 0 4px rgba(242, 101, 34, 0.28), 0 0 20px rgba(242, 101, 34, 0.35);
  transform: translateY(-1px);
}

.site-footer {
  position: relative;
  margin-top: 72px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(44, 76, 102, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 76, 102, 0.16) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.footer-inner,
.footer-bottom {
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 44px 24px 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.footer-bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-list a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color var(--transition);
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--accent-cyan);
}

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

.footer-statement {
  max-width: 340px;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.site-footer .brand-name {
  font-size: 22px;
}

.site-footer .brand-tag {
  font-size: 9px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 0 2px rgba(46, 214, 180, 0.2);
}

.btn-primary {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #E05A1B;
  border-color: #E05A1B;
  color: #ffffff;
  box-shadow: 0 0 0 4px rgba(242, 101, 34, 0.25), 0 0 24px rgba(242, 101, 34, 0.3);
}

.frame {
  position: relative;
  padding: 32px;
  border: 1px solid var(--border-color);
  background: var(--bg-gradient);
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}

.frame::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--accent-cyan);
  border-left: 2px solid var(--accent-cyan);
}

.frame::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--accent-orange);
  border-right: 2px solid var(--accent-orange);
}

.data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border-color);
  border: 1px solid var(--border-color);
}

.data-card {
  position: relative;
  background: var(--bg-secondary);
  padding: 24px 20px;
}

.data-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--accent-cyan);
}

.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-primary);
}

.status-dot::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px rgba(46, 214, 180, 0.7);
}

.status-dot.is-error::before {
  background: var(--accent-orange);
  box-shadow: 0 0 8px rgba(242, 101, 34, 0.7);
}

.status-dot.is-muted::before {
  background: var(--border-color);
  box-shadow: none;
}

.detail-panel {
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  margin-bottom: 12px;
}

.detail-panel summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-headline);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  transition: background var(--transition);
}

.detail-panel summary::-webkit-details-marker {
  display: none;
}

.detail-panel summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--accent-cyan);
  transition: transform var(--transition);
}

.detail-panel[open] summary {
  border-bottom: 1px solid var(--border-color);
  background: rgba(46, 214, 180, 0.04);
}

.detail-panel[open] summary::after {
  transform: rotate(45deg);
}

.detail-panel summary:hover,
.detail-panel summary:focus-visible {
  background: rgba(46, 214, 180, 0.06);
}

.detail-panel .panel-body {
  padding: 20px;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 15px;
}

.figure {
  position: relative;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  overflow: hidden;
  min-height: 160px;
}

.figure::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.figure-fill {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(30, 58, 90, 0.4), rgba(18, 58, 69, 0.1)),
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(44, 76, 102, 0.4) 47px 48px);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
}

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

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

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

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

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

.index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border-color);
}

.index-list li {
  border-bottom: 1px solid var(--border-color);
}

.index-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 4px;
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
}

.index-list a:hover,
.index-list a:focus-visible {
  color: var(--accent-cyan);
  padding-left: 8px;
}

.index-list-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.stat {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent-cyan);
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .header-main {
    justify-content: center;
    padding: 36px 24px 16px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 2px;
    max-width: var(--container);
    margin: 0 auto;
    padding: 10px 24px;
    background: transparent;
    border: none;
    box-shadow: none;
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .site-nav a {
    padding: 6px 16px;
    border-bottom: none;
    font-size: 14px;
    border-radius: 0;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: rgba(46, 214, 180, 0.06);
  }

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

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

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

  .footer-inner {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
  }

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

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 480px) {
  .header-main {
    padding-left: 56px;
    padding-right: 96px;
  }

  .brand-name {
    font-size: 20px;
  }

  .brand-tag {
    display: none;
  }

  .helpdesk-link {
    padding: 8px 10px;
    font-size: 12px;
  }

  .frame {
    padding: 24px 20px;
  }
}

::selection {
  background: rgba(242, 101, 34, 0.75);
  color: #ffffff;
}

@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;
  }

  .site-nav,
  .site-nav[data-open] {
    transition: none;
  }

  .scroll-progress span {
    transition: none;
  }
}

@media print {
  .site-header,
  .site-footer,
  .helpdesk-link,
  .scroll-progress,
  .nav-toggle {
    display: none !important;
  }
}