:root {
  --bg-base: #F2F4F7;
  --bg-paper: #FCFCFD;
  --ink: #101828;
  --blue-deep: #0B1E3A;
  --cyan: #00C9A7;
  --purple: #7A5CFF;
  --red: #E43D30;
  --red-dark: #C62F24;
  --gray: #8A929E;
  --track-gray: #D1D7E0;
  --rail-width: 220px;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, Georgia, serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --fs-hero: clamp(36px, 5vw, 64px);
  --fs-section: clamp(28px, 3vw, 40px);
  --fs-body: 17px;
  --fs-small: 14px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 180ms;
  --dur-slow: 280ms;
  --radius: 2px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 6px 20px -4px rgba(11, 30, 58, 0.18);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  padding-left: var(--rail-width);
  background: var(--bg-base);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--ink);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

p {
  margin: 0 0 1em;
  text-wrap: pretty;
}

a {
  color: var(--blue-deep);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

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

::selection {
  background: rgba(0, 201, 167, 0.22);
  color: var(--ink);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 50%;
  transform: translate(-50%, -300%);
  z-index: 1000;
  background: var(--cyan);
  color: var(--blue-deep);
  font-weight: 700;
  font-size: 14px;
  padding: 8px 20px;
  box-shadow: var(--shadow-md);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus-visible {
  transform: translate(-50%, 0);
  color: var(--blue-deep);
}

.progress-track {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 400;
  background: var(--cyan);
  pointer-events: none;
}

#main-content {
  display: block;
  min-height: 60vh;
  outline: none;
}

.site-header {
  position: relative;
  z-index: 200;
}

.side-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-width);
  background: var(--blue-deep);
  color: rgba(252, 252, 253, 0.75);
  display: flex;
  flex-direction: column;
  padding: 24px 20px 20px;
  z-index: 200;
}

.side-rail::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: repeating-linear-gradient(-45deg, var(--red) 0 10px, transparent 10px 20px);
  opacity: 0.9;
  pointer-events: none;
}

.side-rail__top {
  display: flex;
  flex-direction: column;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}

.brand-lockup:hover {
  color: #fff;
}

.brand-lockup__mark {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 0;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 16px;
  line-height: 1;
  color: #fff;
  flex: 0 0 auto;
}

.brand-lockup__mark::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--red);
  transform: skewX(-12deg);
  z-index: -1;
  box-shadow: 2px 2px 0 rgba(255, 255, 255, 0.08);
}

.brand-lockup__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-lockup__cn {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 18px;
  color: #fff;
  letter-spacing: 0.06em;
}

.brand-lockup__en {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.side-rail__tagline {
  margin-top: 12px;
  font-family: var(--font-serif);
  font-size: 12px;
  line-height: 1.6;
  color: rgba(252, 252, 253, 0.5);
  border-left: 2px solid var(--red);
  padding-left: 10px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  color: #fff;
  cursor: pointer;
  padding: 8px;
  align-items: center;
  gap: 8px;
}

.nav-toggle__icon {
  position: relative;
  width: 18px;
  height: 12px;
  display: inline-block;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: #fff;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease);
}

.nav-toggle__icon::before {
  top: 0;
}

.nav-toggle__icon::after {
  top: 10px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before {
  top: 5px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after {
  top: 5px;
  transform: rotate(-45deg);
}

.nav-toggle__label {
  font-size: 13px;
  font-weight: 600;
  color: rgba(252, 252, 253, 0.8);
}

.command-nav {
  margin-top: 24px;
  flex: 1;
}

.command-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.command-nav__item {
  margin: 0;
}

.command-nav__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px 8px 0;
  color: rgba(252, 252, 253, 0.65);
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.4;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.command-nav__link:hover {
  color: #fff;
  border-left-color: var(--red);
  background: rgba(252, 252, 253, 0.04);
}

.command-nav__link[aria-current="page"] {
  color: #fff;
  border-left-color: var(--cyan);
  background: rgba(0, 201, 167, 0.08);
  font-weight: 600;
}

.command-nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gray);
  letter-spacing: 0.08em;
  transition: color var(--dur) var(--ease);
}

.command-nav__link:hover .command-nav__index {
  color: var(--red);
}

.command-nav__link[aria-current="page"] .command-nav__index {
  color: var(--cyan);
}

.command-nav__label {
  font-weight: 500;
}

.side-rail__foot {
  border-top: 1px solid rgba(209, 215, 224, 0.15);
  padding-top: 16px;
  margin-top: auto;
}

.side-rail__status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(252, 252, 253, 0.45);
}

.side-rail__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.side-rail__icp {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(252, 252, 253, 0.3);
  letter-spacing: 0.05em;
}

.site-footer {
  background: var(--blue-deep);
  color: rgba(252, 252, 253, 0.75);
  margin-top: var(--space-8);
}

.site-footer__accent {
  height: 5px;
  background: repeating-linear-gradient(-45deg, var(--red) 0 8px, transparent 8px 16px);
  opacity: 0.85;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.7fr) minmax(0, 0.9fr) minmax(0, 1.2fr);
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 32px 40px;
}

.site-footer__note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(252, 252, 253, 0.5);
  max-width: 420px;
}

.site-footer__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(209, 215, 224, 0.15);
  margin-bottom: 16px;
}

.site-footer__links a {
  color: rgba(252, 252, 253, 0.7);
  font-size: 14px;
  line-height: 2.2;
  transition: color var(--dur) var(--ease);
}

.site-footer__links a:hover {
  color: var(--cyan);
}

.site-footer__contact li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 8px;
  font-size: 13px;
  line-height: 1.7;
  padding: 4px 0;
  color: rgba(252, 252, 253, 0.65);
}

.site-footer__k {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(252, 252, 253, 0.4);
  letter-spacing: 0.06em;
}

.site-footer__bottom {
  border-top: 1px solid rgba(209, 215, 224, 0.12);
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(252, 252, 253, 0.4);
}

.site-footer__bottom p {
  margin: 0;
}

.page-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
}

.container-data {
  max-width: 1200px;
  margin: 0 auto;
}

.page-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.btn-primary {
  background: var(--red);
  color: #fff;
  box-shadow: 3px 3px 0 rgba(11, 30, 58, 0.25);
}

.btn-primary:hover {
  background: var(--red-dark);
  color: #fff;
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 rgba(11, 30, 58, 0.25);
}

.btn-primary:active {
  transform: translate(3px, 3px);
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--cyan);
  border-color: currentColor;
}

.btn-ghost:hover {
  background: rgba(0, 201, 167, 0.08);
  color: var(--cyan);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray);
  padding: var(--space-4) 0;
}

.breadcrumbs a {
  color: var(--blue-deep);
}

.breadcrumbs a:hover {
  color: var(--purple);
}

.breadcrumbs__sep {
  color: var(--gray);
}

.breadcrumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: var(--space-7) 0 var(--space-4);
}

.section-title__index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--red);
}

.section-title__text {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: var(--fs-section);
  line-height: 1.15;
  color: var(--ink);
}

.section-lead {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.65;
  color: var(--blue-deep);
  border-left: 3px solid var(--red);
  padding-left: 16px;
  margin: var(--space-4) 0 var(--space-5);
}

.diag-tag {
  display: inline-block;
  background: var(--red);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  padding: 6px 16px 6px 14px;
  transform: skewX(-14deg);
  box-shadow: 3px 3px 0 rgba(11, 30, 58, 0.25);
}

.diag-tag > span {
  display: inline-block;
  transform: skewX(14deg);
}

.diag-line {
  display: inline-block;
  width: 52px;
  height: 3px;
  background: var(--red);
  transform: skewX(-55deg);
  vertical-align: middle;
}

.data-panel {
  position: relative;
  overflow: hidden;
  background: var(--blue-deep);
  border: 1px solid rgba(209, 215, 224, 0.15);
  color: var(--bg-paper);
  padding: var(--space-6);
}

.data-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--cyan);
}

.data-panel__label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.1em;
}

.data-panel__value {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  margin-top: 8px;
}

.glass-panel {
  background: rgba(252, 252, 253, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(209, 215, 224, 0.6);
  padding: var(--space-6);
}

.data-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.tag-cyan,
.tag-purple,
.tag-red {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.tag-cyan {
  color: var(--cyan);
  background: rgba(0, 201, 167, 0.1);
  border: 1px solid rgba(0, 201, 167, 0.25);
}

.tag-purple {
  color: var(--purple);
  background: rgba(122, 92, 255, 0.1);
  border: 1px solid rgba(122, 92, 255, 0.25);
}

.tag-red {
  color: var(--red);
  background: rgba(228, 61, 48, 0.08);
  border: 1px solid rgba(228, 61, 48, 0.2);
}

.media-cover {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--blue-deep) 0%, #0d274a 55%, #123057 100%);
  min-height: 200px;
  display: flex;
  align-items: flex-end;
  isolation: isolate;
}

.media-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    repeating-linear-gradient(-45deg, transparent 0 14px, rgba(0, 201, 167, 0.07) 14px 28px),
    linear-gradient(135deg, transparent 55%, rgba(228, 61, 48, 0.18) 55%, rgba(228, 61, 48, 0.18) 62%, transparent 62%);
}

.media-cover::after {
  content: attr(data-placeholder);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(252, 252, 253, 0.28);
  white-space: nowrap;
  z-index: -1;
}

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

.media-cover__label {
  position: relative;
  z-index: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(252, 252, 253, 0.4);
  padding: 12px 16px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}

[data-reveal].is-inview {
  opacity: 1;
  transform: none;
}

[data-scroll-section] {
  position: relative;
}

[data-scroll-section]::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 0;
  width: 4px;
  height: 24px;
  background: var(--red);
  transform: skewX(-50deg);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
  pointer-events: none;
}

[data-scroll-section].is-active::before {
  opacity: 1;
}

[data-spy-target].is-current {
  color: var(--red);
  font-weight: 700;
}

@media (max-width: 1080px) and (min-width: 901px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  body {
    padding-left: 0;
    padding-top: 0;
  }

  #main-content {
    padding-top: 62px;
  }

  .site-footer {
    margin-top: var(--space-6);
  }

  .side-rail {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: auto;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid rgba(209, 215, 224, 0.12);
  }

  .side-rail__top {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .side-rail__tagline {
    display: none;
  }

  .brand-lockup__mark {
    width: 34px;
    height: 34px;
    font-size: 14px;
  }

  .brand-lockup__cn {
    font-size: 16px;
  }

  .brand-lockup__en {
    font-size: 9px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .command-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    padding: 8px 20px 20px;
    background: var(--blue-deep);
    border-top: 1px solid rgba(209, 215, 224, 0.12);
    box-shadow: var(--shadow-md);
    display: block;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
    max-height: calc(100vh - 56px);
    overflow-y: auto;
  }

  .command-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  }

  .command-nav__link {
    font-size: 15px;
    padding: 10px 8px;
  }

  .side-rail__foot {
    display: none;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 20px 32px;
  }

  .site-footer__bottom {
    padding: 16px 20px;
    flex-direction: column;
    align-items: flex-start;
  }

  .page-wrap {
    padding: 0 20px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .side-rail__dot {
    animation: none !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}