:root {
  --ys-bg-deep: #0A1A2A;
  --ys-bg-dark: #081226;
  --ys-green: #00FF88;
  --ys-orange: #FF3D00;
  --ys-glass: rgba(255, 255, 255, 0.08);
  --ys-white: #F0F4F8;
  --ys-gray: #A0B0C0;
  --ys-green-data: #00C878;
  --ys-sidebar-w: 260px;
  --ys-header-h: 68px;
  --ys-container-w: 1240px;
  --ys-font-body: "HarmonyOS Sans", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ys-font-display: "Alibaba PuHuiTi", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ys-font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, monospace;
}

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

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

body {
  font-family: var(--ys-font-body);
  background-color: var(--ys-bg-deep);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--ys-gray);
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
  padding-top: var(--ys-header-h);
}

body.site-nav-open {
  overflow: hidden;
}

#main-content {
  min-height: 70vh;
  scroll-margin-top: calc(var(--ys-header-h) + 12px);
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--ys-green);
  outline-offset: 2px;
}

::selection {
  background: rgba(0, 255, 136, 0.22);
  color: var(--ys-white);
}

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

a {
  color: var(--ys-green);
}

button {
  font-family: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--ys-green);
  color: #04121d;
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-300%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s, opacity 0.3s;
}

.skip-link:focus {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 300;
  height: var(--ys-header-h);
  background: rgba(10, 26, 42, 0.96);
  border-bottom: 1px solid rgba(0, 255, 136, 0.16);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--ys-green), var(--ys-orange));
  z-index: 5;
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 16px 0 20px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ys-white);
  min-width: 0;
}

.site-header__mark {
  display: inline-flex;
  align-items: flex-end;
  gap: 3px;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.site-header__bar {
  display: block;
  width: 5px;
  border-radius: 2px 2px 0 0;
  background: linear-gradient(180deg, var(--ys-green), var(--ys-green-data));
}

.site-header__bar:nth-child(1) {
  height: 10px;
}

.site-header__bar:nth-child(2) {
  height: 22px;
}

.site-header__bar:nth-child(3) {
  height: 28px;
}

.site-header__bar:nth-child(4) {
  height: 16px;
}

.site-header__word {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.site-header__name {
  font-family: var(--ys-font-display);
  font-size: 1rem;
  font-weight: 900;
  color: var(--ys-white);
  line-height: 1.2;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.site-header__sub {
  font-size: 0.6875rem;
  color: var(--ys-gray);
  line-height: 1.2;
  letter-spacing: 0.08em;
  white-space: nowrap;
  margin-top: 2px;
}

.site-header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  border-radius: 2px;
}

.site-header__togglebar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ys-white);
  transition: transform 0.3s, opacity 0.3s;
}

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

.site-header__toggle[aria-expanded="true"] .site-header__togglebar:nth-child(2) {
  opacity: 0;
}

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

.site-nav {
  position: fixed;
  top: var(--ys-header-h);
  left: 0;
  bottom: 0;
  z-index: 280;
  width: min(86vw, 340px);
  padding: 24px 20px 32px;
  background: rgba(8, 18, 38, 0.98);
  border-right: 1px solid rgba(0, 255, 136, 0.2);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transform: translateX(-105%);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  overflow-y: auto;
}

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

.site-nav__list {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
}

.site-nav__item {
  margin-bottom: 2px;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 12px;
  color: var(--ys-gray);
  text-decoration: none;
  font-size: 0.9375rem;
  border-radius: 2px;
  border-left: 2px solid transparent;
  transition: background 0.25s, color 0.25s;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--ys-white);
  background: rgba(255, 255, 255, 0.04);
}

.site-nav__link[aria-current="page"] {
  color: var(--ys-green);
  border-left-color: var(--ys-green);
  background: rgba(0, 255, 136, 0.06);
}

.site-nav__mark {
  width: 8px;
  height: 8px;
  border: 1px solid currentColor;
  transform: rotate(45deg);
  flex-shrink: 0;
  transition: background 0.25s, box-shadow 0.25s;
}

.site-nav__link[aria-current="page"] .site-nav__mark {
  background: var(--ys-green);
  border-color: var(--ys-green);
  box-shadow: 0 0 8px rgba(0, 255, 136, 0.5);
}

.site-nav__label {
  margin-right: auto;
  letter-spacing: 0.02em;
}

.site-nav__index {
  font-family: var(--ys-font-mono);
  font-size: 0.75rem;
  color: var(--ys-gray);
  opacity: 0.7;
}

.site-nav__link[aria-current="page"] .site-nav__index {
  color: var(--ys-green);
  opacity: 1;
}

.site-nav__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 16px;
  background: rgba(0, 255, 136, 0.12);
  border: 1px solid rgba(0, 255, 136, 0.35);
  border-radius: 2px;
  color: var(--ys-green);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 700;
  transition: background 0.25s, transform 0.25s;
}

.site-nav__cta:hover,
.site-nav__cta:focus-visible {
  background: rgba(0, 255, 136, 0.2);
  transform: translateY(-2px);
}

.site-nav__cta-mark {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--ys-green);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.site-nav__cta-label {
  letter-spacing: 0.08em;
}

.site-footer {
  margin-top: 80px;
  background-color: #060e18;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.015) 0 1px, transparent 1px 48px);
  background-size: 48px 48px;
  border-top: 1px solid rgba(0, 255, 136, 0.18);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ys-green), var(--ys-orange) 60%, transparent);
  opacity: 0.7;
}

.site-footer__top {
  max-width: var(--ys-container-w);
  margin: 0 auto;
  padding: 48px 20px 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.site-footer__logolink {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ys-white);
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: 900;
  font-family: var(--ys-font-display);
}

.site-footer__symbol {
  display: inline-block;
  width: 12px;
  height: 12px;
  background: var(--ys-green);
  transform: rotate(45deg);
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
  flex-shrink: 0;
}

.site-footer__title {
  letter-spacing: 0.04em;
}

.site-footer__line {
  font-size: 0.9375rem;
  color: var(--ys-white);
  letter-spacing: 0.03em;
  line-height: 1.7;
}

.site-footer__keywords {
  font-size: 0.75rem;
  color: var(--ys-gray);
  line-height: 1.8;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 2px solid var(--ys-green);
  max-width: 42ch;
}

.site-footer__section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.site-footer__heading {
  font-family: var(--ys-font-display);
  font-size: 0.9375rem;
  font-weight: 900;
  color: var(--ys-white);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.site-footer__links a {
  color: var(--ys-gray);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s, padding-left 0.2s;
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
  color: var(--ys-green);
  padding-left: 4px;
}

.site-footer__contacts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--ys-gray);
  line-height: 1.6;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  max-width: var(--ys-container-w);
  margin: 0 auto;
  text-align: center;
}

.site-footer__copyright,
.site-footer__icp {
  font-family: var(--ys-font-mono);
  font-size: 0.75rem;
  color: var(--ys-gray);
}

.ys-container {
  width: min(var(--ys-container-w), 100% - 40px);
  margin-inline: auto;
}

.ys-section {
  position: relative;
  padding: 72px 0 32px;
}

.ys-section__no {
  display: block;
  font-family: var(--ys-font-mono);
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 255, 136, 0.35);
}

.ys-section__label {
  display: inline-block;
  position: absolute;
  left: -8px;
  top: 8px;
  writing-mode: vertical-rl;
  font-family: var(--ys-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--ys-green);
}

.ys-section__title {
  font-family: var(--ys-font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  color: var(--ys-white);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.ys-card {
  background: var(--ys-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  padding: 24px;
}

.ys-card__title {
  font-family: var(--ys-font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ys-white);
  margin-bottom: 8px;
}

.ys-card__body {
  font-size: 0.875rem;
  color: var(--ys-gray);
  line-height: 1.7;
}

.ys-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.ys-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border: 1px solid var(--ys-green);
  background: rgba(0, 255, 136, 0.1);
  color: var(--ys-green);
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.25s, transform 0.25s, box-shadow 0.25s;
  cursor: pointer;
}

.ys-btn:hover,
.ys-btn:focus-visible {
  background: rgba(0, 255, 136, 0.2);
  box-shadow: 0 4px 20px rgba(0, 255, 136, 0.15);
  transform: translateY(-2px);
}

.ys-btn--solid {
  background: var(--ys-green);
  color: #05141f;
}

.ys-btn--solid:hover,
.ys-btn--solid:focus-visible {
  background: #00ff88;
  color: #05141f;
  box-shadow: 0 4px 20px rgba(0, 255, 136, 0.25);
}

.ys-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--ys-gray);
}

.ys-breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: rgba(160, 176, 192, 0.5);
}

.ys-breadcrumb a {
  color: var(--ys-gray);
  text-decoration: none;
  transition: color 0.2s;
}

.ys-breadcrumb a:hover,
.ys-breadcrumb a:focus-visible {
  color: var(--ys-green);
}

.ys-prose {
  max-width: 72ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ys-gray);
}

.ys-prose p {
  margin-bottom: 1.2em;
}

.ys-prose h2,
.ys-prose h3 {
  color: var(--ys-white);
  font-family: var(--ys-font-display);
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}

.ys-highlight {
  color: var(--ys-green);
  font-family: var(--ys-font-mono);
  font-weight: 700;
}

.ys-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.75rem;
  color: var(--ys-gray);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  font-family: var(--ys-font-mono);
  letter-spacing: 0.04em;
}

.ys-stat {
  display: inline-flex;
  flex-direction: column;
  padding: 16px 20px;
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: 2px;
}

.ys-stat__value {
  font-family: var(--ys-font-mono);
  font-size: 1.875rem;
  font-weight: 900;
  color: var(--ys-green);
  line-height: 1.2;
}

.ys-stat__label {
  font-size: 0.75rem;
  color: var(--ys-gray);
  margin-top: 4px;
}

.ys-divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 255, 136, 0.4), transparent);
}

@media (min-width: 900px) {
  body {
    padding-top: 0;
    padding-left: calc(var(--ys-sidebar-w) + 32px);
  }

  #main-content {
    scroll-margin-top: 0;
  }

  .site-header {
    top: 0;
    left: 0;
    right: auto;
    width: var(--ys-sidebar-w);
    height: 100vh;
    border-right: 1px solid rgba(0, 255, 136, 0.18);
    border-bottom: 0;
    background-color: rgba(10, 26, 42, 0.92);
    background-image:
      linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
      repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.015) 0 1px, transparent 1px 24px);
    background-size: 24px 24px;
  }

  .site-header__inner {
    align-items: stretch;
    flex-direction: column;
    height: 100%;
    padding: 32px 0;
  }

  .site-header__brand {
    margin: 0 20px 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-header__name {
    font-size: 1.125rem;
  }

  .site-header__sub {
    font-size: 0.6875rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-nav {
    position: static;
    transform: none;
    visibility: visible;
    width: auto;
    padding: 0;
    background: transparent;
    border: 0;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    overflow: visible;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .site-nav__list {
    margin-bottom: 16px;
  }

  .site-nav__link {
    padding: 12px 20px;
    margin: 2px 12px;
    font-size: 0.875rem;
    position: relative;
  }

  .site-nav__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%) scaleY(0);
    width: 2px;
    height: 20px;
    background: var(--ys-green);
    transition: transform 0.25s;
  }

  .site-nav__link[aria-current="page"]::before {
    transform: translateY(-50%) scaleY(1);
  }

  .site-nav__cta {
    margin: auto 16px 0;
  }

  .site-footer {
    margin-top: 96px;
  }

  .site-footer__top {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding: 56px 24px 44px;
  }

  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (max-width: 899.98px) {
  .site-nav {
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.45s;
    visibility: hidden;
  }

  .site-nav[data-open] {
    visibility: visible;
  }
}

@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;
  }

  .site-nav {
    transition: none;
  }
}