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

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

body {
  min-height: 100vh;
  background-color: #0A192F;
  background-image:
    radial-gradient(ellipse 60% 40% at 80% 0%, rgba(0, 255, 136, 0.05), transparent),
    radial-gradient(ellipse 40% 30% at 15% 100%, rgba(255, 127, 0, 0.04), transparent);
  color: #FFFFFF;
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

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

ul, ol {
  list-style: none;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

:root {
  --color-bg: #0A192F;
  --color-surface-solid: #0F2746;
  --color-surface-deep: #1B3A5C;
  --color-green: #00FF88;
  --color-orange: #FF7F00;
  --color-text: #FFFFFF;
  --color-text-muted: #9AA7B8;
  --color-border: rgba(255, 255, 255, 0.15);
  --color-error: #FF3B30;
  --font-heading: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', monospace;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --topbar-height: 64px;
  --sidebar-width: 240px;
  --content-max: 1200px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.24);
  --transition: 0.25s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--color-text);
  line-height: 1.3;
}

h1 {
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(22px, 3vw, 32px);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 20px;
}

p {
  margin-bottom: 12px;
}

:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(0, 255, 136, 0.25);
  color: #FFFFFF;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 100vh;
  z-index: 1000;
  pointer-events: none;
}

.topbar,
.sidebar,
.skip-link,
.scroll-progress {
  pointer-events: auto;
}

.scroll-progress {
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 1003;
  background: var(--color-green);
  color: #052415;
  padding: 10px 24px;
  border-radius: 0 0 12px 12px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  transition: top 0.2s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-green), var(--color-orange));
  z-index: 1003;
  border-radius: 0 3px 3px 0;
}

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px 0 0;
  background: rgba(10, 25, 47, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1001;
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 100%;
  padding: 0 16px;
  cursor: pointer;
  transition: background var(--transition);
}

.topbar__brand:hover {
  background: rgba(255, 255, 255, 0.04);
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, #00FF88, #00CC66);
  color: #04260F;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 900;
  box-shadow: 0 0 16px rgba(0, 255, 136, 0.25);
  flex-shrink: 0;
  line-height: 1;
}

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

.brand-text__name {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.brand-text__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-green);
  letter-spacing: 0.14em;
  margin-top: 2px;
}

.topbar__tools {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-right: 4px;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: transparent;
  color: var(--color-text-muted);
  transition: all var(--transition);
  cursor: pointer;
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
}

.quick-search {
  position: relative;
}

.quick-search__panel {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  min-width: 180px;
  padding: 14px;
  background: linear-gradient(145deg, #132C4D, #1A3A5E);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 100;
}

.quick-search__panel::before {
  content: '';
  position: absolute;
  top: -5px;
  right: 16px;
  width: 10px;
  height: 10px;
  background: #132C4D;
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
  transform: rotate(45deg);
}

.quick-search__panel[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.quick-search__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.quick-search__link {
  display: block;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.quick-search__link:hover {
  background: rgba(0, 255, 136, 0.1);
  color: var(--color-green);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  transition: background var(--transition);
  cursor: pointer;
  margin-left: 2px;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.14);
}

.nav-toggle__line {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.is-active .nav-toggle__line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle.is-active .nav-toggle__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.sidebar {
  position: absolute;
  top: var(--topbar-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  padding: 24px 20px 20px;
  background: linear-gradient(145deg, #0F2746, #1B3A5C);
  border-right: 1px solid var(--color-border);
  overflow-x: hidden;
  overflow-y: auto;
  visibility: hidden;
  transform: translateX(-105%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), visibility 0s linear 0.35s;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
  z-index: 1000;
}

.sidebar[data-open="true"] {
  visibility: visible;
  transform: translateX(0);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), visibility 0s;
}

.sidebar__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px 18px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 14px;
  flex-shrink: 0;
}

.sidebar__label {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 900;
  color: var(--color-text-muted);
  letter-spacing: 0.16em;
}

.sidebar__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-green);
  background: rgba(0, 255, 136, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.08em;
}

.sidebar__nav {
  flex: 1;
}

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

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 12px;
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

.nav-link[aria-current="page"] {
  color: var(--color-green);
  background: rgba(0, 255, 136, 0.1);
  box-shadow: inset 3px 0 0 0 var(--color-green);
}

.nav-link__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  min-width: 20px;
  transition: color var(--transition);
}

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

.sidebar__foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 8px 0;
  border-top: 1px solid var(--color-border);
  margin-top: 16px;
  flex-shrink: 0;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.8);
  animation: pulse 2s infinite;
  flex-shrink: 0;
}

.sidebar__status-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.sidebar__deco {
  position: absolute;
  bottom: 80px;
  right: 18px;
  width: 56px;
  height: 56px;
  background: rgba(255, 127, 0, 0.06);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  pointer-events: none;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.72);
  }
}

body.nav-open {
  overflow: hidden;
}

body.nav-open::after {
  content: '';
  position: fixed;
  top: var(--topbar-height);
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(5, 13, 26, 0.6);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  z-index: 999;
}

.site-main {
  padding: calc(var(--topbar-height) + 32px) 24px 64px;
  min-height: 100vh;
  position: relative;
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

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

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

.breadcrumb__sep {
  color: rgba(255, 255, 255, 0.3);
  font-family: var(--font-mono);
  font-size: 12px;
}

.section {
  margin-bottom: 64px;
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.section__title {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.02em;
  position: relative;
  padding-left: 16px;
}

.section__title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  border-radius: 2px;
  background: linear-gradient(var(--color-green), rgba(0, 255, 136, 0.15));
}

.card {
  background: linear-gradient(145deg, #0F2746, #1B3A5C);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(0, 255, 136, 0.25);
}

.card--accent {
  box-shadow: inset 3px 0 0 0 var(--color-green), var(--shadow-card);
}

.card--accent:hover {
  box-shadow: inset 3px 0 0 0 var(--color-green), 0 12px 40px rgba(0, 0, 0, 0.3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #00FF88, #00CC66);
  color: #052415;
}

.btn-primary:hover {
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-green);
  color: var(--color-green);
  transform: translateY(-2px);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.tag--green {
  background: rgba(0, 255, 136, 0.12);
  color: var(--color-green);
}

.tag--orange {
  background: rgba(255, 127, 0, 0.12);
  color: var(--color-orange);
}

.data-metric {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--color-green);
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.panel {
  background: rgba(15, 39, 70, 0.7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.divider {
  height: 1px;
  background: var(--color-border);
  border: none;
  margin: 32px 0;
}

.data-anno {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.media-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(145deg, rgba(27, 58, 92, 0.6), rgba(15, 39, 70, 0.8));
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 9;
}

.media-wrap::before {
  content: 'LEYU DATA';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.15);
}

.site-footer {
  background: linear-gradient(145deg, #0B1D36, #152F4E);
  border-top: 1px solid var(--color-border);
  padding: 48px 24px 24px;
  position: relative;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: var(--content-max);
  margin: 0 auto;
}

.footer__brand-name {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer__brand-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.footer__brand-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 320px;
}

.footer__trust {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  padding: 12px 16px;
  background: rgba(0, 255, 136, 0.06);
  border-left: 3px solid rgba(0, 255, 136, 0.4);
  border-radius: 8px;
  max-width: 360px;
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin-bottom: 14px;
}

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

.footer__links a {
  font-size: 14px;
  color: var(--color-text-muted);
  transition: all var(--transition);
  display: inline-block;
}

.footer__links a:hover {
  color: var(--color-green);
  transform: translateX(4px);
}

.footer__contact {
  display: flex;
  flex-direction: column;
}

.footer__contact li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  word-break: break-all;
}

.footer__contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-green);
  letter-spacing: 0.08em;
}

.footer__note {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-top: 12px;
  opacity: 0.85;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--content-max);
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-muted);
}

.footer__copyright {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__domain {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-green);
  opacity: 0.8;
}

.footer__icp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 136, 0.12);
  border: 1px solid rgba(0, 255, 136, 0.3);
  color: var(--color-green);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition);
  z-index: 998;
}

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

.back-to-top:hover {
  background: var(--color-green);
  color: #052415;
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.4);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .sidebar {
    visibility: visible;
    transform: translateX(0);
    transition: none;
    box-shadow: none;
  }

  .site-main,
  .site-footer {
    margin-left: var(--sidebar-width);
  }

  .site-main {
    padding: calc(var(--topbar-height) + 40px) 48px 80px;
  }

  .site-footer {
    padding: 56px 48px 32px;
    margin-left: var(--sidebar-width);
  }

  .site-footer .footer__grid,
  .site-footer .footer__bottom {
    max-width: calc(var(--content-max) - 96px);
  }

  .topbar__brand {
    flex-shrink: 0;
    width: var(--sidebar-width);
    border-right: 1px solid var(--color-border);
  }

  body.nav-open::after {
    display: none;
  }
}

@media (max-width: 767px) {
  .site-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
  }

  .footer__grid {
    gap: 24px;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

@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;
  }

  .pulse-dot {
    animation: none;
  }
}