*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
body, h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
ul { padding-left: 0; }
img, svg, video { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: var(--accent-main); }
a:hover { color: var(--data-highlight); }
:focus-visible { outline: 3px solid var(--accent-alt); outline-offset: 2px; border-radius: 4px; }

:root {
  --bg-primary: #0A1128;
  --bg-alt: #1B1035;
  --bg-surface: #141E30;
  --accent-main: #39FF14;
  --accent-alt: #7B2FF7;
  --metal: #8E9AA5;
  --text-main: #FFFFFF;
  --text-secondary: #B0C4DE;
  --data-highlight: #F0DB4F;
  --warning: #E74C3C;
  --font-heading: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --header-width: 280px;
  --transition: 0.3s ease;
  --container-max: 1400px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent-main);
  color: var(--bg-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: 700;
  z-index: 5000;
  text-decoration: none;
  transition: left 0.2s;
}
.skip-link:focus-visible { left: 0; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--header-width);
  background: var(--bg-alt);
  display: flex;
  flex-direction: column;
  padding: 0;
  border-right: 1px solid rgba(142, 154, 165, 0.2);
  z-index: 2000;
}
.site-header__top {
  padding: 1.5rem 1.25rem 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
}
.brand__mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent-alt), var(--accent-main));
  color: var(--bg-primary);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.25rem;
  border-radius: 12px;
  transform: skew(-8deg);
  box-shadow: 0 4px 12px rgba(123, 47, 247, 0.35);
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand__text strong {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}
.brand__text small {
  color: var(--text-secondary);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--bg-surface);
  border-radius: 10px;
}
.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-main);
  transition: transform var(--transition), opacity var(--transition);
}
.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; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.site-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1rem 1rem 1.5rem;
  margin-top: 1.5rem;
}
.site-nav__list {
  list-style: none;
  display: grid;
  gap: 0.35rem;
}
.site-nav__item {
  margin: 0;
}
.site-nav__item a {
  display: block;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
}
.site-nav__item a:hover,
.site-nav__item a:focus-visible {
  background: rgba(57, 255, 20, 0.08);
  color: var(--accent-main);
  padding-left: 1.5rem;
}
.site-nav__item a[aria-current="page"] {
  background: var(--accent-main);
  color: var(--bg-primary);
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.25);
}
.site-nav__batch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface);
  border: 1px solid rgba(57, 255, 20, 0.2);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-top: auto;
}
.batch-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.batch-code {
  font-family: var(--font-data);
  color: var(--accent-main);
  font-weight: 700;
  font-size: 0.9rem;
}

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

.container {
  width: min(100% - 2rem, var(--container-max));
  margin-inline: auto;
}
.prose {
  max-width: 70ch;
  color: var(--text-secondary);
  line-height: 1.9;
}
.prose p { margin-bottom: 1.5em; }
.prose h2, .prose h3, .prose h4 {
  color: var(--text-main);
  font-family: var(--font-heading);
  margin: 2em 0 0.5em;
}
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-main);
  border-left: 4px solid var(--accent-alt);
  padding-left: 0.75rem;
  margin-bottom: 0.5rem;
}
.section-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 60ch;
  margin-top: 0.5rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.breadcrumb li + li::before {
  content: "→";
  margin-right: 0.5rem;
  color: var(--metal);
}
.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--accent-main); }
.breadcrumb [aria-current] { color: var(--data-highlight); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
}
.btn--primary {
  background: var(--accent-main);
  color: var(--bg-primary);
  box-shadow: 0 4px 14px rgba(57, 255, 20, 0.25);
}
.btn--primary:hover {
  background: #4dff38;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(57, 255, 20, 0.3);
}
.btn--ghost {
  background: transparent;
  border: 1px solid var(--metal);
  color: var(--text-main);
}
.btn--ghost:hover {
  border-color: var(--accent-alt);
  color: var(--accent-alt);
}
.btn--block { display: flex; width: 100%; }

.grid {
  display: grid;
  gap: 1.5rem;
}
.grid--2cols { grid-template-columns: repeat(2, 1fr); }
.grid--3cols { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid rgba(142, 154, 165, 0.2);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-alt);
  box-shadow: 0 12px 30px rgba(123, 47, 247, 0.15);
}
.card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}
.card__text {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: rgba(123, 47, 247, 0.15);
  color: var(--accent-alt);
  font-size: 0.8rem;
  font-weight: 600;
}
.pill--green { background: rgba(57, 255, 20, 0.1); color: var(--accent-main); }
.pill--gold { background: rgba(240, 219, 79, 0.1); color: var(--data-highlight); }

.data-text {
  font-family: var(--font-data);
  font-size: 1.1rem;
}
.data-text--large {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
}
.data-highlight { color: var(--data-highlight); }
.accent-text { color: var(--accent-main); }

.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--metal), transparent);
  border: 0;
  margin: 2rem 0;
}

.image-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--bg-alt), var(--bg-surface));
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}
.image-wrapper--wide { aspect-ratio: 21 / 9; }
.image-wrapper--portrait { aspect-ratio: 3 / 4; }
.image-wrapper img {
  object-fit: cover;
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}
.image-wrapper figcaption,
.image-wrapper .caption {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  background: rgba(10, 17, 40, 0.7);
  color: var(--text-main);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  backdrop-filter: blur(4px);
}

.chart-placeholder {
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.05), rgba(123, 47, 247, 0.05));
  border: 1px dashed var(--metal);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  color: var(--text-secondary);
}

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid rgba(142, 154, 165, 0.2);
  padding: 3rem 0 1.5rem;
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr;
  gap: 2rem;
  padding: 0 clamp(1.5rem, 4vw, 3rem);
  max-width: var(--container-max);
  margin-inline: auto;
}
.site-footer__brand p {
  max-width: 40ch;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}
.site-footer__links ul,
.site-footer__contact ul {
  list-style: none;
  display: grid;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.site-footer__links a,
.site-footer__contact a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.site-footer__links a:hover,
.site-footer__contact a:hover {
  color: var(--accent-main);
}
.site-footer__heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-main);
  border-left: 4px solid var(--accent-alt);
  padding-left: 0.75rem;
}
.site-footer__bottom {
  border-top: 1px solid rgba(142, 154, 165, 0.2);
  margin-top: 2rem;
  padding: 1rem clamp(1.5rem, 4vw, 3rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.site-footer__bottom p { margin: 0; }
[data-year] { font-variant-numeric: tabular-nums; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0;
  background: linear-gradient(to right, var(--accent-alt), var(--accent-main));
  z-index: 3000;
  pointer-events: none;
}
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-alt);
  color: var(--text-main);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  padding: 0;
  box-shadow: 0 8px 20px rgba(123, 47, 247, 0.3);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-4px);
}

@media (max-width: 1024px) {
  .site-header {
    width: 100%;
    height: 64px;
    bottom: auto;
    border-right: none;
    border-bottom: 1px solid rgba(142, 154, 165, 0.2);
    padding: 0;
  }
  .site-header__top {
    height: 64px;
    padding: 0 1rem;
    flex: 1;
  }
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    top: 64px;
    bottom: 0;
    left: 0;
    width: min(320px, 85vw);
    background: var(--bg-alt);
    padding: 2rem 1.5rem;
    margin: 0;
    transform: translateX(-100%);
    transition: transform var(--transition), visibility 0s var(--transition);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
    visibility: hidden;
    z-index: 1001;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform var(--transition), visibility 0s 0s;
  }
  .site-nav__batch { margin-top: 2rem; }
  #main-content,
  .site-footer { margin-left: 0; }
  #main-content { padding-top: 64px; }
}

@media (max-width: 768px) {
  .grid--2cols,
  .grid--3cols { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .site-footer__bottom { justify-content: flex-start; }
  .site-header .brand__text small { font-size: 0.65rem; }
}

@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;
  }
  .skip-link { transition: none; }
}