:root {
  --color-bg: #0A192F;
  --color-bg-alt: #112240;
  --color-accent: #FF6B35;
  --color-highlight: #C6FF00;
  --color-link: #58A6FF;
  --color-muted: #9CA3AF;
  --color-text: #F8F8F8;
  --color-ink: #1A1A1A;
  --font-display: "Anton", "Arial Black", Impact, "思源黑体", "Microsoft YaHei", sans-serif;
  --font-body: Roboto, "Open Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-number: "DIN Alternate", "Roboto Mono", monospace;
  --rail-width: 280px;
}

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

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

body {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: repeating-linear-gradient(45deg, rgba(255,255,255,.015) 0 1px, transparent 1px 16px);
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: .02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.8rem); }
h3 { font-size: 1.2rem; }

p {
  margin-bottom: 1em;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2000;
  padding: 12px 20px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-display);
  font-size: .9rem;
  letter-spacing: .06em;
  text-decoration: none;
  text-transform: uppercase;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(100%);
  white-space: nowrap;
}

.skip-link:focus {
  clip: auto;
  clip-path: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 1002;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-highlight));
  transition: width .1s linear;
}

.site-header {
  position: sticky;
  top: 0;
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 100;
  background: var(--color-bg);
  border-right: 1px solid rgba(156,163,175,.14);
  scrollbar-width: thin;
}

.site-header__inner {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 28px 20px 20px;
}

.brand {
  position: relative;
  z-index: 1002;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

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

.brand__mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: .05em;
  flex-shrink: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.brand__text {
  display: block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.05;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.brand__sub {
  display: block;
  font-family: var(--font-body);
  font-size: .62rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-top: 2px;
}

.primary-nav {
  margin-top: 48px;
}

.primary-nav__list {
  display: grid;
  gap: 4px;
}

.primary-nav a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 10px;
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(156,163,175,.12);
  transition: color .2s ease, background .2s ease, padding-left .2s ease;
}

.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  background: rgba(17,34,64,.55);
  color: var(--color-accent);
  padding-left: 16px;
}

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

.primary-nav a[aria-current="page"] {
  color: var(--color-highlight);
}

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

.primary-nav a[aria-current="page"] .primary-nav__index {
  color: var(--color-highlight);
}

.primary-nav__index {
  font-family: var(--font-number);
  font-size: .7rem;
  color: var(--color-muted);
  letter-spacing: 0;
  min-width: 20px;
  transition: color .2s;
}

.site-header__meta {
  margin-top: auto;
  padding: 18px 16px;
  background: var(--color-bg-alt);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.live-indicator__dot {
  width: 8px;
  height: 8px;
  background: var(--color-highlight);
  box-shadow: 0 0 8px var(--color-highlight);
  animation: live-pulse 2s ease-in-out infinite;
}

@keyframes live-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.8); }
}

.site-header__meta p {
  margin: 12px 0 0;
  font-size: .72rem;
  line-height: 1.55;
  color: var(--color-muted);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: .8rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-text);
  background: rgba(17,34,64,.5);
  border: 1px solid rgba(156,163,175,.25);
  cursor: pointer;
  z-index: 1001;
  line-height: 1;
}

.nav-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav-toggle__icon {
  position: relative;
  display: inline-block;
  width: 22px;
  height: 14px;
}

.nav-toggle__icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform .25s ease, opacity .25s ease;
}

.nav-toggle__icon span:nth-child(1) { top: 0; }
.nav-toggle__icon span:nth-child(2) { top: 6px; }
.nav-toggle__icon span:nth-child(3) { top: 12px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.main-content {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  min-height: 70vh;
  outline: none;
}

.page-shell {
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding: clamp(24px, 5vw, 64px);
}

.section {
  margin-block: clamp(32px, 6vw, 80px);
}

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

.section__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .75rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.section__kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--color-accent);
}

.section__title {
  margin: 0;
}

.grid {
  display: grid;
  gap: clamp(16px, 3vw, 28px);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  position: relative;
  padding: 28px;
  background: var(--color-bg-alt);
  border: 1px solid rgba(156,163,175,.14);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  background: var(--color-bg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 24px;
  font-family: var(--font-display);
  font-size: .9rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  border: 2px solid var(--color-accent);
  background: transparent;
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.btn:hover,
.btn:focus-visible {
  background: var(--color-accent);
  color: var(--color-bg);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.btn--primary:hover {
  background: transparent;
  color: var(--color-accent);
}

.btn--ghost {
  border-color: rgba(156,163,175,.4);
  color: var(--color-muted);
}

.btn--ghost:hover {
  border-color: var(--color-highlight);
  color: var(--color-highlight);
  background: transparent;
}

.btn--highlight {
  background: var(--color-highlight);
  border-color: var(--color-highlight);
  color: var(--color-bg);
}

.btn--highlight:hover {
  background: transparent;
  color: var(--color-highlight);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  padding: 12px 0;
  margin-bottom: 24px;
  font-size: .8rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--color-muted);
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--color-muted);
  opacity: .5;
}

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

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

.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--color-bg-alt);
  background-image: repeating-linear-gradient(45deg, rgba(255,255,255,.03) 0 1px, transparent 1px 12px);
}

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

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.toc {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  padding: 24px;
}

.toc__title {
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: .85rem;
  letter-spacing: .15em;
  color: var(--color-muted);
  text-transform: uppercase;
}

.toc__list {
  margin-top: 8px;
}

.toc__item + .toc__item {
  border-top: 1px solid rgba(156,163,175,.1);
}

.toc__link {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  color: var(--color-text);
  text-decoration: none;
  font-size: .85rem;
}

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

.stat {
  font-family: var(--font-number);
  font-size: clamp(2rem, 5vw, 4.2rem);
  line-height: 1;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.stat--green {
  color: var(--color-highlight);
}

.stat__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: .72rem;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  border: 1px solid rgba(198,255,0,.35);
  background: rgba(198,255,0,.08);
  color: var(--color-highlight);
}

.tag--solid {
  background: var(--color-highlight);
  border-color: var(--color-highlight);
  color: var(--color-bg);
}

.tag--orange {
  border-color: rgba(255,107,53,.4);
  background: rgba(255,107,53,.08);
  color: var(--color-accent);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

.table th {
  padding: 12px 8px;
  text-align: left;
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-muted);
  border-bottom: 2px solid var(--color-accent);
}

.table td {
  padding: 12px 8px;
  border-bottom: 1px solid rgba(156,163,175,.12);
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.table tr:hover td {
  background: rgba(17,34,64,.5);
}

.site-footer {
  position: relative;
  grid-column: 1 / -1;
  grid-row: 2 / 3;
  background: var(--color-bg-alt);
  border-top: 2px solid var(--color-accent);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
}

.site-footer__brand {
  position: relative;
  padding: 48px 24px;
  background: var(--color-bg);
  border-right: 1px solid rgba(156,163,175,.12);
}

.site-footer__brand::before {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-highlight));
  margin-bottom: 24px;
}

.site-footer__tagline {
  margin-top: 16px;
  max-width: 30em;
  font-size: .78rem;
  line-height: 1.6;
  color: var(--color-muted);
}

.site-footer__main {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(32px, 5vw, 64px);
}

.site-footer__heading {
  position: relative;
  margin-bottom: 16px;
  padding-left: 18px;
  font-size: .85rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-footer__heading::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--color-highlight);
}

.site-footer__list {
  display: grid;
  gap: 4px;
}

.site-footer__list a {
  display: inline-block;
  padding: 4px 0;
  color: var(--color-text);
  text-decoration: none;
  font-size: .875rem;
  position: relative;
}

.site-footer__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.site-footer__list a:hover::after {
  transform: scaleX(1);
}

.site-footer__contact p {
  margin-bottom: 8px;
  color: var(--color-muted);
  font-size: .85rem;
  word-break: break-word;
}

.site-footer__bottom {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding: 18px clamp(16px, 4vw, 48px);
  border-top: 1px solid rgba(156,163,175,.12);
  font-size: .75rem;
  color: var(--color-muted);
}

.site-footer__bottom p {
  margin: 0;
}

@media (max-width: 1199px) {
  :root {
    --rail-width: 220px;
  }

  .site-footer__main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-shell {
    max-width: 100%;
  }
}

@media (max-width: 860px) {
  body {
    grid-template-columns: minmax(0, 1fr);
    background-image: none;
  }

  .site-header {
    grid-column: 1 / -1;
    grid-row: 1 / 2;
    height: auto;
    overflow: visible;
    border-right: none;
    border-bottom: 1px solid rgba(156,163,175,.15);
  }

  .site-header__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0;
    padding: 12px 16px;
  }

  .brand {
    grid-column: 1;
    grid-row: 1;
  }

  .nav-toggle {
    grid-column: 2;
    grid-row: 1;
    display: inline-flex;
  }

  .primary-nav {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    display: block;
    margin-top: 0;
    padding: 88px 24px 24px;
    background: var(--color-bg);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform .3s ease, visibility .3s ease;
    overflow-y: auto;
  }

  .primary-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

  .primary-nav__list {
    display: grid;
    gap: 4px;
  }

  .primary-nav a {
    padding: 18px 12px;
    font-size: 1.2rem;
  }

  .site-header__meta {
    display: none;
  }

  .main-content {
    grid-column: 1 / -1;
    grid-row: 2 / 3;
  }

  .site-footer {
    grid-column: 1 / -1;
    grid-row: 3 / 4;
  }

  .site-footer__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-footer__brand {
    padding: 32px 20px;
    border-right: none;
    border-bottom: 1px solid rgba(156,163,175,.12);
  }

  .site-footer__main {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 32px 20px;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .primary-nav {
    transition: none;
  }

  .live-indicator__dot {
    animation: none;
  }
}