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

:root {
  --c-space: #0A1428;
  --c-panel: #1A2C42;
  --c-panel-2: #16233A;
  --c-orange: #FF6C2F;
  --c-green: #00E5A0;
  --c-cyan: #00C2FF;
  --c-text: #E6EDF3;
  --c-dim: #94A3B8;
  --c-line: #2D4A66;
  --c-warn: #FFB020;
  --c-deep: #111B2E;
  --font-head: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;
  --header-w: 200px;
  --header-w-tablet: 108px;
  --header-h-mobile: 58px;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --ease-out: cubic-bezier(.22, .61, .36, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background-color: var(--c-space);
  background-image: radial-gradient(ellipse 80% 60% at 85% -10%, rgba(0, 194, 255, .06), transparent 60%);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  line-height: 1.3;
  letter-spacing: .5px;
}

ul, ol { list-style: none; }

a {
  color: var(--c-cyan);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

a:hover { color: var(--c-orange); }

button {
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

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

::selection { background: var(--c-orange); color: #0A1428; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--c-space); }
::-webkit-scrollbar-thumb { background: var(--c-line); border-radius: 8px; border: 2px solid var(--c-space); }

:focus-visible { outline: 2px solid var(--c-orange); outline-offset: 2px; border-radius: 4px; }

.skip-link {
  position: fixed;
  top: -56px;
  left: 50%;
  z-index: 9999;
  transform: translateX(-50%);
  background: var(--c-orange);
  color: #0A1428;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: 0 8px 30px rgba(255, 108, 47, .35);
  transition: top .25s var(--ease-out);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .5px;
  text-align: center;
  transition: transform .25s var(--ease-out), box-shadow .25s var(--ease-out), border-color .25s, background-color .25s, color .2s;
}

.btn--primary { background: var(--c-orange); color: #0A1428; box-shadow: 0 6px 20px rgba(255, 108, 47, .25); }
.btn--primary:hover { background: #FF8558; color: #0A1428; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(255, 108, 47, .4); }
.btn--ghost { border-color: var(--c-line); color: var(--c-text); background: rgba(255, 255, 255, .02); }
.btn--ghost:hover { border-color: var(--c-orange); color: var(--c-orange); transform: translateY(-2px); }
.btn--sm { padding: 8px 18px; font-size: 13px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  width: var(--header-w);
  height: 100vh;
  height: 100dvh;
  padding: 26px 18px 20px;
  background:
    repeating-linear-gradient(-45deg, rgba(255, 108, 47, .04) 0 2px, transparent 2px 14px),
    linear-gradient(180deg, #0C1830 0%, #0A1428 78%);
  border-right: 1px solid var(--c-line);
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  text-align: center;
  color: var(--c-text);
}

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

.brand__mark {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(255, 108, 47, .22), rgba(0, 229, 160, .1)),
    var(--c-panel);
  border: 1px solid var(--c-line);
  box-shadow: 0 0 26px rgba(255, 108, 47, .18), inset 0 0 18px rgba(0, 194, 255, .05);
  transform: rotate(-5deg);
  transition: transform .3s var(--ease-out), border-color .3s;
}

.brand__mark::after {
  content: "";
  position: absolute;
  top: -3px;
  right: -3px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-green);
  border: 2px solid #0A1428;
  box-shadow: 0 0 0 0 rgba(0, 229, 160, .45);
  animation: pulseRing 2s infinite;
}

.brand:hover .brand__mark { transform: rotate(0deg) scale(1.04); border-color: var(--c-orange); }

@keyframes pulseRing {
  0% { box-shadow: 0 0 0 0 rgba(0, 229, 160, .5); }
  70% { box-shadow: 0 0 0 8px rgba(0, 229, 160, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 160, 0); }
}

.brand__code {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .5px;
  color: var(--c-orange);
}

.brand__name { font-family: var(--font-head); font-size: 18px; letter-spacing: 3px; line-height: 1.2; }

.brand__meta {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: .5px;
  color: var(--c-dim);
}

.brand__live {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-green);
  animation: liveBlink 1.4s ease-in-out infinite;
}

@keyframes liveBlink { 50% { opacity: .25; } }

.track-progress {
  position: relative;
  width: 3px;
  height: 42px;
  margin: 20px auto 4px;
  border-radius: var(--radius-pill);
  background: var(--c-line);
  overflow: hidden;
}

.track-progress span {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--c-orange), var(--c-green));
  transform: scaleY(0);
  transform-origin: top;
}

.site-nav {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  overflow-y: auto;
}

.site-nav__list { position: relative; width: 100%; }

.site-nav__list::before {
  content: "";
  position: absolute;
  top: 14px;
  bottom: 14px;
  left: 21px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--c-line) 18%, var(--c-line) 82%, transparent);
}

.site-nav__item { position: relative; }

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 10px 11px 17px;
  border-radius: var(--radius-pill);
  transition: background-color .25s, color .25s;
}

.site-nav__link:hover { background: rgba(255, 255, 255, .03); }

.site-nav__dot {
  flex-shrink: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-panel-2);
  border: 1px solid var(--c-line);
  box-shadow: 0 0 0 2px #0A1428;
  transition: background-color .25s, border-color .25s, box-shadow .25s;
}

.site-nav__label {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--c-dim);
  transition: color .25s;
}

.site-nav__link:hover .site-nav__label { color: var(--c-text); }
.site-nav__link:hover .site-nav__dot { border-color: var(--c-cyan); }

.site-nav__link[aria-current="page"] .site-nav__label,
.site-nav__link.is-current .site-nav__label { color: var(--c-text); }

.site-nav__link[aria-current="page"] .site-nav__dot,
.site-nav__link.is-current .site-nav__dot {
  background: var(--c-orange);
  border-color: var(--c-orange);
  box-shadow: 0 0 0 4px rgba(255, 108, 47, .16), 0 0 14px rgba(255, 108, 47, .5);
}

.site-nav__link[aria-current="page"],
.site-nav__link.is-current {
  background: linear-gradient(90deg, rgba(255, 108, 47, .09), transparent 85%);
}

.site-header__foot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
}

.site-header__chapter {
  font-size: 13px;
  color: var(--c-text);
  letter-spacing: 2px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__tick {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: .5px;
  color: var(--c-dim);
  margin-top: 2px;
}

.to-top {
  align-self: center;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-top: 12px;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  color: var(--c-orange);
  font-size: 16px;
  line-height: 1;
  transition: border-color .25s, background-color .25s, transform .25s var(--ease-out), opacity .25s;
}

.to-top:hover { border-color: var(--c-orange); background: rgba(255, 108, 47, .12); transform: translateY(-2px); }

.nav-toggle,
.nav-backdrop { display: none; }

.site-main {
  margin-left: var(--header-w);
  min-height: 100vh;
  padding: 48px clamp(24px, 4vw, 64px) 100px;
}

.site-main:focus { outline: none; }

.container-wide { max-width: 1240px; margin: 0 auto; }
.container-narrow { max-width: 760px; margin: 0 auto; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--c-dim);
}

.breadcrumb a { color: var(--c-cyan); }
.breadcrumb a:hover { color: var(--c-orange); }
.breadcrumb__sep { color: var(--c-line); font-family: var(--font-data); }
.breadcrumb [aria-current="page"] { color: var(--c-text); }

.section-head { max-width: 860px; margin-bottom: 36px; }

.section-head__eyebrow {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--c-orange);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-head__eyebrow::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 1px;
  margin-right: 8px;
  background: var(--c-orange);
  vertical-align: middle;
}

.section-head__title {
  font-family: var(--font-head);
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.2;
  margin-bottom: 12px;
}

.section-head__desc { color: var(--c-dim); font-size: 15px; max-width: 620px; }

.prose { font-size: 15px; color: var(--c-dim); line-height: 1.9; }
.prose h2 { font-family: var(--font-head); font-size: 20px; color: var(--c-text); margin: 2em 0 .8em; }
.prose p { margin-bottom: 1.2em; }
.prose p:last-child { margin-bottom: 0; }

hr { border: 0; height: 1px; background: var(--c-line); margin: 32px 0; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.data-card {
  position: relative;
  padding: 22px 22px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(26, 44, 66, .92), rgba(17, 27, 46, .94));
  transition: transform .3s var(--ease-out), border-color .3s, box-shadow .3s;
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 108, 47, .45);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .35);
}

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

.data-card--hud::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--c-orange);
  border-left: 2px solid var(--c-orange);
  border-radius: var(--radius-md) 0 0 0;
}

.data-card--hud::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--c-green);
  border-right: 2px solid var(--c-green);
  border-radius: 0 0 var(--radius-md) 0;
}

.data-card__label { font-family: var(--font-data); font-size: 11px; letter-spacing: 1px; color: var(--c-dim); }

.data-card__value {
  font-family: var(--font-head);
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.25;
  margin-top: 6px;
}

.data-card__value em { font-style: normal; color: var(--c-orange); }

.data-card__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: center;
  border-top: 1px solid var(--c-line);
  margin-top: 14px;
  padding-top: 12px;
  font-size: 12px;
  color: var(--c-dim);
}

.data-card__trend--up { font-family: var(--font-data); color: var(--c-green); }
.data-card__trend--down { font-family: var(--font-data); color: var(--c-warn); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  font-size: 12px;
  color: var(--c-dim);
  line-height: 1.5;
  white-space: nowrap;
}

.tag--orange { color: var(--c-orange); border-color: rgba(255, 108, 47, .4); background: rgba(255, 108, 47, .08); }
.tag--green { color: var(--c-green); border-color: rgba(0, 229, 160, .4); background: rgba(0, 229, 160, .08); }
.tag--cyan { color: var(--c-cyan); border-color: rgba(0, 194, 255, .4); background: rgba(0, 194, 255, .08); }
.tag--live { color: var(--c-warn); border-color: rgba(255, 176, 32, .4); background: rgba(255, 176, 32, .08); }

.tag--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-warn);
  animation: softBlink 1.4s ease-in-out infinite;
}

@keyframes softBlink { 50% { opacity: .3; } }

.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background:
    repeating-linear-gradient(-45deg, rgba(255, 108, 47, .05) 0 2px, transparent 2px 14px),
    linear-gradient(135deg, var(--c-panel) 0%, var(--c-deep) 100%);
}

.media--hero { aspect-ratio: 21 / 9; border-radius: calc(var(--radius-lg) * 1.4); }
.media--wide { aspect-ratio: 16 / 7; }
.media--square { aspect-ratio: 1 / 1; }
.media--compact { aspect-ratio: 16 / 9; }

.media__img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.site-footer {
  position: relative;
  margin-left: var(--header-w);
  overflow: hidden;
  background: linear-gradient(180deg, #0D1626 0%, var(--c-deep) 100%);
  border-top: 1px solid var(--c-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-warn) 30%, var(--c-green) 70%, var(--c-cyan));
  opacity: .85;
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, .02) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
  padding: 56px clamp(24px, 4vw, 64px) 32px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.1fr;
  gap: 48px;
}

.site-footer__logo { font-family: var(--font-head); font-size: 24px; letter-spacing: 3px; margin-bottom: 14px; }

.site-footer__logo span {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--c-orange);
  margin-left: 6px;
}

.site-footer__desc {
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-dim);
  max-width: 380px;
  margin-bottom: 20px;
}

.site-footer__title {
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--c-text);
  margin-bottom: 18px;
  padding-bottom: 12px;
  position: relative;
}

.site-footer__title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 26px;
  height: 2px;
  background: var(--c-orange);
}

.site-footer__nav ul,
.site-footer__contact ul { display: grid; gap: 10px; }

.site-footer__nav a { color: var(--c-dim); font-size: 14px; }
.site-footer__nav a:hover { color: var(--c-orange); }

.site-footer__contact a { font-family: var(--font-data); font-size: 13px; color: var(--c-cyan); }
.site-footer__contact a:hover { color: var(--c-green); }
.site-footer__contact li { color: var(--c-dim); font-size: 14px; }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, .07);
}

.site-footer__copy { font-family: var(--font-data); font-size: 12px; color: var(--c-dim); }
.site-footer__legal { display: flex; flex-wrap: wrap; gap: 22px; }
.site-footer__legal a { font-size: 12px; color: var(--c-dim); }
.site-footer__legal a:hover { color: var(--c-cyan); }

@media (max-width: 767.98px) {
  .site-header {
    width: 100%;
    height: var(--header-h-mobile);
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    border-right: none;
    border-bottom: 1px solid var(--c-line);
    background: linear-gradient(180deg, #0C1830, #0A1428);
  }

  .brand { flex-direction: row; gap: 10px; text-align: left; min-width: 0; }
  .brand__mark { width: 36px; height: 36px; border-radius: 10px; }
  .brand__code { font-size: 11px; }
  .brand__name { font-size: 15px; letter-spacing: 2px; white-space: nowrap; }
  .brand__meta { display: none; }
  .track-progress { display: none; }

  .site-header__foot {
    flex-direction: row;
    align-items: center;
    margin-left: auto;
    padding-top: 0;
    border-top: none;
    min-width: 0;
  }

  .site-header__chapter {
    font-size: 12px;
    letter-spacing: .5px;
    color: var(--c-dim);
    max-width: 30vw;
  }

  .site-header__tick { display: none; }

  .site-nav {
    position: fixed;
    top: var(--header-h-mobile);
    right: 0;
    z-index: 1200;
    width: min(320px, 84vw);
    height: calc(100vh - var(--header-h-mobile));
    height: calc(100dvh - var(--header-h-mobile));
    display: block;
    padding: 24px 20px;
    background: linear-gradient(160deg, #0C1830, #0A1428);
    border-left: 1px solid var(--c-line);
    box-shadow: -20px 0 60px rgba(0, 0, 0, .4);
    transform: translateX(105%);
    transition: transform .35s var(--ease-out);
    overflow-y: auto;
  }

  .site-nav[data-open] { transform: translateX(0); }
  .site-nav__list::before { display: none; }
  .site-nav__link { padding: 13px 14px; gap: 12px; }
  .site-nav__label { font-size: 16px; letter-spacing: 1px; }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
    padding: 10px;
    border-radius: 10px;
  }

  .nav-toggle__bar {
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: var(--c-text);
    transition: transform .25s var(--ease-out), opacity .25s, background-color .25s;
  }

  .nav-toggle__text { font-size: 10px; color: var(--c-dim); }

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

  .to-top {
    position: fixed;
    right: 16px;
    bottom: 18px;
    z-index: 800;
    width: 44px;
    height: 44px;
    margin: 0;
    background: rgba(26, 44, 66, .9);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .4);
    opacity: 0;
    pointer-events: none;
    transform: translateY(14px);
    transition: opacity .3s var(--ease-out), transform .3s var(--ease-out), border-color .25s, background-color .25s;
  }

  .to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

  .nav-backdrop {
    position: fixed;
    inset: var(--header-h-mobile) 0 0 0;
    z-index: 1100;
    display: block;
    background: rgba(4, 8, 16, .6);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s;
    backdrop-filter: blur(2px);
  }

  .nav-backdrop.is-open { opacity: 1; pointer-events: auto; }

  .site-main {
    margin-left: 0;
    padding: calc(var(--header-h-mobile) + 26px) 18px 64px;
  }

  .site-footer { margin-left: 0; }
  .site-footer__inner { padding: 44px 20px 28px; }
  .site-footer__grid { grid-template-columns: 1fr; gap: 36px; }
  .stat-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
  .media--hero { aspect-ratio: 4 / 3; }
}

@media (min-width: 768px) and (max-width: 1023.98px) {
  .site-header { width: var(--header-w-tablet); padding: 20px 8px 16px; }
  .brand__mark { width: 42px; height: 42px; border-radius: 12px; }
  .brand__name { font-size: 13px; letter-spacing: 1px; }
  .brand__meta { display: none; }
  .track-progress { margin-top: 16px; }

  .site-nav__link {
    flex-direction: column;
    gap: 6px;
    padding: 12px 4px;
    align-items: center;
  }

  .site-nav__list::before {
    top: 10px;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
  }

  .site-nav__dot { box-shadow: 0 0 0 2px #0A1428; }
  .site-nav__label { font-size: 12px; letter-spacing: .5px; text-align: center; }
  .site-header__tick { display: none; }
  .site-header__chapter { font-size: 11px; letter-spacing: 1px; }

  .site-main {
    margin-left: var(--header-w-tablet);
    padding: 36px 28px 80px;
  }

  .site-footer { margin-left: var(--header-w-tablet); }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .site-footer__brand { grid-column: 1 / -1; }
}

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

  *, *::before, *::after {
    animation-duration: .001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001s !important;
  }

  .brand__mark::after,
  .brand__live,
  .tag--live::before { animation: none !important; }
}