:root {
  --color-bg: #0B1B3A;
  --color-bg-alt: #0E2145;
  --color-card: #1E2A44;
  --color-line: #2A3B5C;
  --color-text: #F5F7FA;
  --color-dim: #C0C0C0;
  --color-accent: #39FF14;
  --color-cyan: #00E5FF;
  --color-orange: #FF6B35;
  --color-purple: #7B2FFF;
  --color-red: #FF3B30;
  --font-head: "Montserrat Black", "Noto Sans SC Black", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-w: 264px;
  --max-w: 1240px;
}

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

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

body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

body {
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-cyan);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

h3 {
  font-size: 1.4rem;
}

p {
  max-width: 70ch;
}

::selection {
  background: var(--color-accent);
  color: #06121F;
}

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

#main-content:focus {
  outline: none;
}

@keyframes ky-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.5);
  }
  50% {
    opacity: 0.6;
    box-shadow: 0 0 0 6px rgba(57, 255, 20, 0);
  }
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border: 2px solid var(--color-bg);
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 3000;
  padding: 12px 20px;
  background: var(--color-accent);
  color: #06121F;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transform: translateY(-120%);
  transition: transform 0.25s ease;
}

.skip-link:hover {
  text-decoration: none;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 1000;
  background: rgba(11, 27, 58, 0.92);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.05) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
}

.site-header.is-scrolled {
  background: rgba(11, 27, 58, 0.98);
}

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

.site-header__inner::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan) 50%, transparent);
  opacity: 0.7;
  pointer-events: none;
}

.site-header__brand {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  text-decoration: none;
  color: var(--color-text);
  line-height: 1;
}

.site-header__brand:hover {
  text-decoration: none;
}

.site-header__brand-mark {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: 0.05em;
  color: var(--color-text);
}

.site-header__brand-mark::after {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  margin-top: 6px;
  background: var(--color-accent);
}

.site-header__brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-dim);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid var(--color-line);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--color-accent);
  background: rgba(57, 255, 20, 0.08);
}

.nav-toggle__box {
  position: relative;
  width: 18px;
  height: 14px;
  display: inline-block;
}

.nav-toggle__bar {
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--color-accent);
  transition: transform 0.25s ease, opacity 0.25s ease, top 0.25s ease;
}

.nav-toggle__bar:nth-child(1) {
  top: 0;
}

.nav-toggle__bar:nth-child(2) {
  top: 6px;
}

.nav-toggle__bar:nth-child(3) {
  top: 12px;
}

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

.nav-toggle__label {
  color: var(--color-text);
}

.site-nav {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 999;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  padding: 16px 20px 24px;
  background: rgba(11, 27, 58, 0.98);
  border-bottom: 1px solid var(--color-line);
  transform: translateY(-110%);
  visibility: hidden;
  transition: transform 0.3s ease, visibility 0.3s ease;
}

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

.site-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 10px;
  color: var(--color-dim);
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-text);
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.08), transparent);
  border-left-color: var(--color-accent);
  text-decoration: none;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-text);
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.12), transparent);
  border-left-color: var(--color-accent);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  opacity: 0.75;
}

.site-nav__live {
  display: none;
}

.site-nav__live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: ky-pulse 1.6s ease infinite;
}

.site-nav__live-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-dim);
}

.site-nav__live-value {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
}

.site-header__meta {
  display: none;
}

body.nav-open {
  overflow: hidden;
}

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 56px 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
}

.section__num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

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

.section__title {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.section__lead {
  margin-top: 4px;
  color: var(--color-dim);
  font-size: 15px;
  line-height: 1.7;
  max-width: 64ch;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline-offset: 4px;
}

.btn--primary {
  background: var(--color-accent);
  color: #06121F;
}

.btn--primary:hover {
  background: #4CFF32;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-line);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--orange {
  background: var(--color-orange);
  color: #06121F;
}

.btn--orange:hover {
  background: #FF7D4D;
}

.panel {
  position: relative;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
}

.panel::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.panel__label {
  display: block;
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-cyan);
}

.panel__title {
  margin: 0 0 8px;
  font-size: 22px;
}

.panel__body {
  color: var(--color-dim);
  font-size: 14px;
  line-height: 1.7;
}

.data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.data-card {
  position: relative;
  padding: 20px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
}

.data-card__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-dim);
}

.data-card__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
}

.data-card__unit {
  font-size: 14px;
  color: var(--color-dim);
  margin-left: 4px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-dim);
}

.tag--live {
  color: var(--color-accent);
  border-color: rgba(57, 255, 20, 0.35);
}

.tag--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: ky-pulse 1.4s ease infinite;
}

.tag--orange {
  color: var(--color-orange);
  border-color: rgba(255, 107, 53, 0.4);
}

.breadcrumb {
  margin: 0 0 24px;
}

.breadcrumb__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-dim);
}

.breadcrumb__link {
  color: var(--color-cyan);
  text-decoration: none;
}

.breadcrumb__link:hover {
  text-decoration: underline;
}

.breadcrumb__sep {
  color: var(--color-line);
}

.breadcrumb__current {
  color: var(--color-text);
}

.media {
  position: relative;
  background: linear-gradient(135deg, var(--color-card), var(--color-bg-alt));
  border: 1px solid var(--color-line);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.media::before {
  content: "KAIYUN // 2026";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--color-dim);
  background:
    linear-gradient(135deg, transparent 40%, rgba(57, 255, 20, 0.06) 50%, transparent 60%),
    linear-gradient(45deg, transparent 40%, rgba(0, 229, 255, 0.06) 50%, transparent 60%);
  background-size: 240% 240%;
}

.media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.media--wide {
  aspect-ratio: 21 / 9;
}

.media--portrait {
  aspect-ratio: 3 / 4;
}

.media--square {
  aspect-ratio: 1 / 1;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px) skewX(-1deg);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.site-footer {
  position: relative;
  margin-top: 56px;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan) 45%, var(--color-purple));
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 20px 40px;
}

.site-footer__brand-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-footer__brand {
  display: inline-flex;
  flex-direction: column;
  font-family: var(--font-head);
  font-size: 30px;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--color-text);
  line-height: 1;
}

.site-footer__brand::after {
  content: "";
  width: 32px;
  height: 4px;
  margin-top: 10px;
  background: var(--color-accent);
}

.site-footer__tagline {
  margin: 14px 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--color-cyan);
}

.site-footer__trust {
  max-width: 42ch;
  font-size: 13px;
  line-height: 1.75;
  color: var(--color-dim);
}

.site-footer__col {
  display: flex;
  flex-direction: column;
}

.site-footer__heading {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
}

.site-footer__link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__link-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-dim);
  font-size: 14px;
}

.site-footer__link-list a::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-line);
  transform: rotate(45deg);
  transition: background 0.2s ease, transform 0.2s ease;
}

.site-footer__link-list a:hover {
  color: var(--color-accent);
}

.site-footer__link-list a:hover::before {
  background: var(--color-accent);
  transform: rotate(135deg);
}

.site-footer__contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--color-dim);
  font-size: 13px;
  line-height: 1.6;
}

.site-footer__bottom {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
}

.site-footer__bottom-inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-dim);
}

.site-footer__icp {
  color: var(--color-dim);
}

@media (min-width: 768px) {
  .container {
    padding: 0 28px;
  }

  .section {
    padding: 72px 0;
  }

  .section__head {
    flex-direction: row;
    align-items: baseline;
    gap: 16px;
  }

  .section__lead {
    margin-top: 0;
  }

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

  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    padding: 52px 28px 44px;
  }

  .site-footer__bottom-inner {
    flex-direction: row;
    justify-content: space-between;
    padding: 18px 28px;
  }
}

@media (min-width: 1024px) {
  body {
    padding-left: var(--header-w);
  }

  .site-header {
    right: auto;
    bottom: 0;
    width: var(--header-w);
    height: auto;
    border-bottom: none;
    border-right: 1px solid var(--color-line);
    background: rgba(11, 27, 58, 0.82);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%);
  }

  .site-header.is-scrolled {
    background: rgba(11, 27, 58, 0.97);
  }

  .site-header__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 32px 24px 24px;
  }

  .site-header__inner::after {
    left: auto;
    top: 0;
    bottom: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-accent), var(--color-cyan) 40%, transparent 90%);
    opacity: 0.5;
  }

  .site-header__brand {
    gap: 3px;
  }

  .site-header__brand-mark {
    font-size: 28px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    flex: 1;
    display: flex;
    flex-direction: column;
    margin-top: 36px;
    padding: 0;
    background: transparent;
    border-bottom: none;
    transform: none;
    visibility: visible;
    max-height: none;
    overflow: visible;
  }

  .site-nav__list {
    gap: 2px;
  }

  .site-nav__link {
    font-size: 15px;
    padding: 13px 12px;
  }

  .site-nav__live {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: auto;
    padding: 14px;
    background: rgba(57, 255, 20, 0.04);
    border: 1px solid var(--color-line);
  }

  .site-header__meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-line);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-dim);
    letter-spacing: 0.08em;
  }

  .site-header__meta-value {
    color: var(--color-text);
    font-size: 13px;
    font-weight: 700;
  }

  .site-header__meta-tz {
    font-size: 10px;
    color: var(--color-dim);
  }

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

  .site-footer {
    margin-top: 72px;
  }

  .site-footer__inner {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
  }
}

@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;
  }

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

  .site-nav {
    transition: none;
  }
}