:root {
  --color-bg: #0A1128;
  --color-bg-deep: #060B1A;
  --color-surface: #13294B;
  --color-accent: #00F5A0;
  --color-warn: #FF6B35;
  --color-text: #F2F5F9;
  --color-text-dim: #B0C4DE;
  --color-line: #1E3A5F;
  --font-head: 'Arial Black','Noto Sans SC Black','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body: 'Noto Sans SC','Microsoft YaHei','PingFang SC',Arial,sans-serif;
  --font-mono: 'Roboto Mono',monospace;
  --shadow-card: 0 10px 24px rgba(0,0,0,0.28);
  --shadow-hover: 0 16px 32px rgba(0,0,0,0.42);
  --container: 1280px;
  --header-top-h: 72px;
  --header-nav-h: 56px;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1000px 400px at 85% -80px, rgba(0,245,160,0.08), transparent 60%),
    radial-gradient(800px 300px at -80px 20%, rgba(255,107,53,0.06), transparent 60%),
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
}

main {
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  line-height: 1.15;
  color: var(--color-text);
  margin: 0 0 0.5em;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 1em;
}

ul {
  margin: 0;
  padding: 0;
}

a {
  color: var(--color-accent);
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-warn);
}

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

button {
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.visually-hidden {
  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: -100px;
  left: 24px;
  z-index: 300;
  background: var(--color-accent);
  color: var(--color-bg-deep);
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 4px;
  text-decoration: none;
  transition: top 0.2s ease;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 4px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.btn-support {
  background: var(--color-accent);
  color: var(--color-bg-deep);
  box-shadow: 0 4px 16px rgba(0,245,160,0.18);
}

.btn-support:hover {
  background: #d1ffea;
  color: var(--color-bg-deep);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,245,160,0.24);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,17,40,0.86);
  -webkit-backdrop-filter: saturate(120%) blur(16px);
  backdrop-filter: saturate(120%) blur(16px);
  border-bottom: 1px solid var(--color-line);
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(178,196,222,0.08);
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), var(--color-warn));
}

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

.header-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-top-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--color-text);
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  position: relative;
  background: linear-gradient(135deg, #00F5A0 0%, #00C978 100%);
  clip-path: polygon(14% 0, 100% 0, 86% 100%, 0 82%, 0 18%);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 34%;
  width: 0;
  height: 0;
  transform: translateX(-50%);
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-bottom: 11px solid var(--color-bg-deep);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.brand-site {
  font-size: 12px;
  color: var(--color-text-dim);
  letter-spacing: 0.12em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 260px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 8px 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.header-search:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,245,160,0.14);
}

.search-icon {
  position: relative;
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
  border: 2px solid var(--color-text-dim);
  border-radius: 50%;
  opacity: 0.9;
}

.search-icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 6px;
  height: 2px;
  background: var(--color-text-dim);
  transform: rotate(45deg);
  border-radius: 1px;
}

.search-input {
  width: 100%;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--color-text);
  font-size: 14px;
  font-family: var(--font-body);
}

.search-input::placeholder {
  color: var(--color-text-dim);
  opacity: 0.8;
}

.header-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-nav-h);
}

.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 14px;
  color: var(--color-text-dim);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-text);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 6px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover::after {
  transform: scaleX(1);
}

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

.nav-link[aria-current="page"]::before {
  content: "";
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--color-accent);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--color-warn);
}

.nav-aside {
  display: flex;
  align-items: center;
}

.live-pulse {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(0,245,160,0.25);
  border-radius: 999px;
  font-size: 12px;
  color: var(--color-text-dim);
  background: rgba(0,245,160,0.05);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse-dot 1.6s ease-out infinite;
}

.live-text {
  letter-spacing: 0.02em;
}

@keyframes pulse-dot {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(0,245,160,0.6);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(0,245,160,0);
  }
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: rgba(255,255,255,0.03);
  cursor: pointer;
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.nav-toggle-bar {
  height: 2px;
  width: 20px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.site-footer {
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-line);
  margin-top: 80px;
  position: relative;
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent 30%, var(--color-warn));
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1.2fr;
  gap: 48px 40px;
}

.footer-brand p {
  color: var(--color-text-dim);
  font-size: 14px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-head);
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-logo .brand-mark {
  width: 34px;
  height: 34px;
}

.footer-trust {
  border-left: 3px solid var(--color-accent);
  padding-left: 14px;
}

.footer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  margin-bottom: 18px;
  color: var(--color-text);
}

.footer-title::before {
  content: "";
  width: 16px;
  height: 3px;
  background: var(--color-warn);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
}

.footer-list {
  list-style: none;
  display: grid;
  gap: 8px;
}

.footer-list a,
.footer-list li {
  color: var(--color-text-dim);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(30,58,95,0.6);
  margin-top: 48px;
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-icp,
.footer-copy {
  font-size: 13px;
  color: var(--color-text-dim);
  margin: 0;
}

.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 200;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-warn));
  border: 0;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 50% 100%, 0 78%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.back-top:focus-visible {
  clip-path: none;
}

.back-top-icon {
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 12px solid var(--color-bg-deep);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 18px 0 8px;
  font-size: 13px;
  color: var(--color-text-dim);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-line);
}

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

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

.breadcrumb [aria-current="page"] {
  color: var(--color-text);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-label::before {
  content: "";
  width: 22px;
  height: 3px;
  background: var(--color-warn);
  clip-path: polygon(0 0, 100% 0, 70% 100%, 0 100%);
}

.panel {
  background: rgba(19,41,75,0.72);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.panel:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.panel--accent {
  border-top: 3px solid var(--color-accent);
}

.panel--warn {
  border-top: 3px solid var(--color-warn);
}

.grid-dash {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
  margin: 32px 0;
}

.dash-card {
  grid-column: span 3;
  background: linear-gradient(160deg, rgba(19,41,75,0.9) 0%, rgba(10,17,40,0.9) 100%);
  border: 1px solid var(--color-line);
  padding: 22px;
  border-radius: 4px;
  box-shadow: var(--shadow-card);
}

.dash-value {
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1.2;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.dash-label {
  font-size: 13px;
  color: var(--color-text-dim);
}

.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #13294B 0%, #0A1128 100%);
  border: 1px solid var(--color-line);
}

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

.media-frame--portrait::before {
  padding-top: 125%;
}

.media-frame--square::before {
  padding-top: 100%;
}

.media-frame--slanted {
  clip-path: polygon(6% 0, 100% 0, 94% 100%, 0 100%);
}

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

.toc {
  list-style: none;
  padding: 0;
}

.toc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 14px;
  border-left: 2px solid var(--color-line);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.toc-link.is-active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: linear-gradient(90deg, rgba(0,245,160,0.08), transparent);
}

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.js .reveal.is-inview {
  opacity: 1;
  transform: none;
}

.search-flash {
  animation: search-flash 1.8s ease-out;
}

@keyframes search-flash {
  0% {
    box-shadow: 0 0 0 6px rgba(0,245,160,0.35);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0,245,160,0);
  }
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .header-topbar {
    height: 64px;
  }

  .brand-name {
    font-size: 19px;
  }

  .brand-site {
    display: none;
  }

  .header-actions {
    gap: 8px;
  }

  .header-search {
    width: 200px;
    padding: 7px 12px;
  }

  .header-navbar {
    min-height: 52px;
  }

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

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: rgba(6,11,26,0.98);
    border-top: 1px solid var(--color-line);
    box-shadow: 0 24px 40px rgba(0,0,0,0.35);
    padding: 10px 24px 20px;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    padding: 14px 8px;
    border-bottom: 1px solid rgba(30,58,95,0.45);
  }

  .nav-link::after {
    bottom: 4px;
  }

  .nav-aside {
    display: none;
  }

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

  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0.6);
  }

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

  .dash-card {
    grid-column: span 4;
  }
}

@media (max-width: 640px) {
  .header-search {
    display: none;
  }

  .header-actions .btn {
    padding: 8px 12px;
    font-size: 13px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

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

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

  .dash-card {
    grid-column: span 6;
  }
}

@media (max-width: 420px) {
  .dash-card {
    grid-column: span 12;
  }
}

@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 .reveal {
    opacity: 1;
    transform: none;
  }
}