:root {
  --ink: #0A0A0A;
  --paper: #F5F0E6;
  --purple: #4A0E4E;
  --purple-deep: #2D072F;
  --red: #8A1E2D;
  --pink: #FF2A7A;
  --cyan: #00E5FF;
  --border: #2E2E2E;
  --white: #FFFFFF;
  --yellow: #FFB800;
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-display: 'ZCOOL KuaiLe', 'Yuanti SC', 'Comic Sans MS', cursive;
  --font-mono: 'Cutive Mono', 'Roboto Mono', monospace;
  --rail-w: 72px;
  --header-h: 64px;
  --max-w: 1280px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.015) 0,
    rgba(255, 255, 255, 0.015) 1px,
    transparent 1px,
    transparent 4px
  );
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
}

h1 {
  font-size: clamp(3rem, 10vw, 6rem);
}

h2 {
  font-size: clamp(2rem, 5vw, 3rem);
}

h3 {
  font-size: 1.5rem;
}

p {
  margin: 0;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}

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

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

button {
  font-family: inherit;
  font-size: inherit;
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
}

::selection {
  background: var(--pink);
  color: var(--ink);
}

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

.sans-copy {
  font-family: var(--font-sans);
  line-height: 1.6;
}

.display-title {
  font-family: var(--font-display);
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.annotate {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: #9a9a9a;
  writing-mode: vertical-rl;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 300;
  background: var(--pink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 8px 14px;
  transform: translateY(-150%);
  transition: transform .15s ease;
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--ink);
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 120;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--pink), var(--cyan));
}

.brand-rail {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 200;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 20px;
  background:
    linear-gradient(180deg, rgba(255, 42, 122, 0.06), transparent 40%),
    var(--ink);
  border-right: 1px solid var(--border);
}

.brand-rail__index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--pink);
  line-height: 1;
}

.brand-rail__text {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--paper);
  letter-spacing: 0.35em;
  text-shadow: 0 0 20px rgba(255, 42, 122, 0.35);
}

.brand-rail__line {
  display: block;
  width: 1px;
  height: 72px;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
}

.command-bar {
  background: var(--purple);
  color: var(--white);
  border-bottom: 1px solid var(--border);
}

.command-bar__inner {
  position: relative;
  max-width: var(--max-w);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  padding-right: 14px;
  line-height: 1;
}

.brand-logo::after {
  content: "";
  position: absolute;
  right: 0;
  top: 8px;
  width: 3px;
  height: 24px;
  background: var(--pink);
  transform: skewX(-18deg);
}

.brand-logo__cn {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--white);
  letter-spacing: 0.08em;
}

.brand-logo__en {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--cyan);
  letter-spacing: 0.22em;
  margin-top: 4px;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__item {
  flex-shrink: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.82);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}

.site-nav__link:hover {
  color: var(--white);
  background: rgba(0, 0, 0, 0.2);
  border-color: rgba(255, 255, 255, 0.25);
}

.site-nav__link[aria-current="page"] {
  color: var(--white);
  background: rgba(255, 42, 122, 0.12);
  outline: 1px solid var(--pink);
  outline-offset: -1px;
}

.site-nav__num {
  font-size: 0.65rem;
  color: var(--pink);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding: 9px 18px;
  background: var(--pink);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1;
  border: 1px solid var(--pink);
  position: relative;
  overflow: hidden;
  transition: background .2s ease, color .2s ease;
}

.cta-button:hover {
  background: transparent;
  color: var(--pink);
}

.cta-button__text,
.cta-button__arrow {
  position: relative;
  z-index: 1;
}

.cta-button__arrow {
  font-size: 1.1rem;
}

.cta-button::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -30px;
  width: 22px;
  background: rgba(10, 10, 10, 0.25);
  transform: skewX(-24deg);
  transition: left .35s ease;
}

.cta-button:hover::before {
  left: 120%;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding: 8px 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
  font-size: 0.8rem;
  transition: border-color .2s ease;
}

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

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

.nav-toggle__line {
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--pink);
  transition: transform .2s ease, top .2s ease, bottom .2s ease;
}

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

.nav-toggle__line:nth-child(2) {
  bottom: 0;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  bottom: 6px;
  transform: rotate(-45deg);
}

.command-bar__status {
  background: rgba(10, 10, 10, 0.6);
  border-top: 1px solid rgba(0, 229, 255, 0.2);
}

.command-bar__status-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  animation: statusPulse 1.8s infinite;
}

@keyframes statusPulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.35;
    transform: scale(0.8);
  }
}

.status-sep {
  color: rgba(255, 255, 255, 0.2);
}

.site-footer {
  position: relative;
  background: var(--ink);
  border-top: 1px solid var(--border);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: repeating-linear-gradient(
    135deg,
    var(--pink) 0 22px,
    transparent 22px 44px
  );
  opacity: 0.45;
  z-index: 1;
}

.site-footer__inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 32px;
}

.footer-brand__logo {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  line-height: 1.1;
  color: var(--white);
  position: relative;
  margin-bottom: 14px;
}

.footer-brand__logo::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--pink), var(--purple));
  opacity: 0.55;
}

.footer-brand__slogan {
  color: #b8b8b8;
  font-size: 0.85rem;
  line-height: 1.7;
  max-width: 34em;
}

.footer-brand__tag {
  display: inline-block;
  margin-top: 16px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.footer-links__title,
.footer-contact__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--pink);
}

.footer-links__title::before,
.footer-contact__title::before {
  content: "";
  display: inline-block;
  flex-shrink: 0;
  width: 16px;
  height: 2px;
  background: var(--pink);
}

.footer-links__list li + li {
  margin-top: 8px;
}

.footer-links__list a {
  font-size: 0.9rem;
  color: var(--paper);
  transition: color .2s ease, padding-left .2s ease;
}

.footer-links__list a:hover {
  color: var(--pink);
  padding-left: 6px;
}

.footer-contact__item {
  margin-bottom: 4px;
  font-size: 0.82rem;
  color: #b8b8b8;
  line-height: 1.5;
  word-break: break-all;
}

.footer-contact__note {
  margin-top: 8px;
  padding-left: 8px;
  border-left: 2px solid var(--border);
  font-size: 0.72rem;
  color: #777;
}

.site-footer__meta {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border);
}

.site-footer__meta-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: #8a8a8a;
}

.site-footer__trust {
  font-size: 0.76rem;
  color: #8a8a8a;
  line-height: 1.7;
  border-left: 2px solid var(--yellow);
  padding-left: 12px;
}

.site-footer__note {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: #555;
}

[data-year] {
  font-variant-numeric: tabular-nums;
}

.site-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 24px;
}

.site-section {
  padding: 64px 0;
}

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

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--pink);
  color: var(--pink);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.button:hover {
  background: var(--pink);
  color: var(--ink);
}

.button--solid {
  background: var(--pink);
  color: var(--ink);
}

.button--solid:hover {
  background: transparent;
  color: var(--pink);
}

.button--dark {
  border-color: var(--paper);
  color: var(--paper);
}

.button--dark:hover {
  background: var(--paper);
  color: var(--ink);
}

.button--small {
  padding: 6px 12px;
  font-size: 0.72rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 16px 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: #999;
}

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

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

.breadcrumbs__current {
  color: var(--pink);
}

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

.card {
  position: relative;
  padding: 24px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--border);
  transition: transform .25s ease, box-shadow .25s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 8px 8px 0 rgba(255, 42, 122, 0.12);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.tab-list [role="tab"] {
  position: relative;
  bottom: -1px;
  padding: 10px 18px;
  background: transparent;
  border: 1px solid var(--border);
  border-bottom: none;
  color: #aaa;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: color .2s ease, background .2s ease;
}

.tab-list [role="tab"][aria-selected="true"] {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg, rgba(255, 42, 122, 0.14) 0%, transparent 50%),
    var(--purple);
}

.media-frame::before {
  content: attr(data-label);
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.03) 0 10px,
    transparent 10px 20px
  );
}

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

.media-frame--wide {
  aspect-ratio: 16 / 9;
}

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

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

  .brand-rail {
    display: flex;
  }
}

@media (max-width: 1023px) {
  .nav-toggle {
    display: inline-flex;
  }

  .cta-button {
    margin-left: auto;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 30;
    background: var(--purple);
    border-top: 1px solid var(--border);
    border-bottom: 3px solid var(--pink);
    box-shadow: 0 18px 30px rgba(0, 0, 0, 0.45);
  }

  .site-nav[data-open="true"] {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 16px;
  }

  .site-nav__link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 8px;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.12);
    white-space: normal;
    border-radius: 0;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(255, 42, 122, 0.15);
  }
}

@media (max-width: 767px) {
  .site-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .site-section {
    padding: 40px 0;
  }
}

@media (max-width: 639px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 20px 28px;
  }

  .site-footer__meta-inner {
    padding: 16px 20px;
  }

  .status-item--ext,
  .status-sep--ext {
    display: none;
  }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@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;
  }

  .status-dot {
    animation: none;
  }

  .card:hover {
    transform: none;
    box-shadow: 4px 4px 0 rgba(255, 42, 122, 0.12);
  }
}