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

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

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(0, 212, 255, 0.05), transparent 50%),
    radial-gradient(ellipse at 85% 100%, rgba(255, 46, 136, 0.05), transparent 50%),
    #0B0E14;
  color: #EDF2FF;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; border: none; background: none; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

::selection { background: #FF2E88; color: #EDF2FF; }

:root {
  --bg-base: #0B0E14;
  --bg-surface: #131A26;
  --bg-raised: #1D2637;
  --accent-magenta: #FF2E88;
  --accent-blue: #00D4FF;
  --accent-orange: #FF8A00;
  --accent-green: #C6FF00;
  --text-high: #EDF2FF;
  --text-dim: #8A93A8;
  --line-color: #2B3344;
  --font-heading: Impact, 'Roboto Condensed', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  --header-h: 72px;
  --container-w: 1280px;
  --container-pad: clamp(16px, 4vw, 48px);
  --radius: 2px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --section-gap: clamp(56px, 9vw, 128px);
}

:focus-visible {
  outline: 2px solid #00D4FF;
  outline-offset: 3px;
}

#main-content {
  display: block;
  min-height: 70vh;
}
#main-content:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: -2px;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--accent-magenta);
  color: var(--text-high);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: top var(--transition);
}
.skip-link:focus {
  top: 0;
  outline: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.site-header[data-scrolled] {
  background: rgba(11, 14, 20, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line-color);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.progress-track {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  z-index: 3;
}
.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-magenta), var(--accent-blue));
  transition: width 0.1s linear;
}

.header-shell {
  position: relative;
  max-width: var(--container-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--accent-magenta);
  color: var(--bg-base);
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
  clip-path: polygon(8% 0, 100% 0, 92% 100%, 0 100%);
  flex-shrink: 0;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.03em;
  color: var(--text-high);
  white-space: nowrap;
}
.brand-slogan {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.nav-bar {
  margin-left: auto;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dim);
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--accent-magenta);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.nav-link:hover {
  color: var(--text-high);
}
.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}
.nav-link[aria-current="page"] {
  color: var(--text-high);
}
.nav-link[aria-current="page"]:hover {
  color: var(--accent-magenta);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-cta {
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 8px;
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  background: var(--bg-surface);
}
.nav-toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-high);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-high);
  transition: all var(--transition);
  cursor: pointer;
}
.btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}
.btn-primary {
  background: var(--accent-magenta);
  border-color: var(--accent-magenta);
  color: var(--text-high);
}
.btn-primary:hover {
  background: transparent;
  border-color: var(--accent-magenta);
  color: var(--accent-magenta);
  box-shadow: 0 0 20px rgba(255, 46, 136, 0.3);
}
.btn-outline {
  border-color: var(--text-dim);
  color: var(--text-dim);
}
.btn-outline:hover {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.site-footer {
  position: relative;
  background: var(--bg-surface);
  border-top: 1px solid var(--line-color);
  margin-top: var(--section-gap);
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-magenta) 0%, var(--accent-blue) 50%, var(--accent-orange) 100%);
  opacity: 0.8;
}
.footer-shell {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) var(--container-pad) 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 0.8fr 1.2fr;
  gap: 40px;
}
.footer-brand-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}
.footer-brand-block .brand { margin-bottom: 4px; }
.footer-about {
  font-size: 0.88rem;
  color: var(--text-dim);
  max-width: 42ch;
}
.footer-trust {
  font-size: 0.78rem;
  color: var(--text-dim);
  border-left: 2px solid var(--accent-green);
  padding-left: 10px;
}
.footer-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 16px;
}
.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-link {
  font-size: 0.88rem;
  color: var(--text-dim);
  transition: color var(--transition), padding-left var(--transition);
}
.footer-link:hover {
  color: var(--accent-magenta);
  padding-left: 4px;
}
.footer-contact-col p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.7;
}
.footer-note {
  font-size: 0.75rem;
  border-left: 2px solid var(--accent-orange);
  padding-left: 10px;
  margin-top: 12px;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line-color);
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-dim);
}
.footer-legal {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-sep {
  color: var(--line-color);
}
.footer-icp {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-dim);
}

.section {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: var(--section-gap) var(--container-pad);
}
.page-head {
  position: relative;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: calc(var(--header-h) + clamp(40px, 8vw, 88px)) var(--container-pad) clamp(40px, 6vw, 72px);
}
.page-head[data-transparent] {
  padding-top: var(--header-h);
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
}
.page-body {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: calc(var(--header-h) + var(--section-gap)) var(--container-pad) var(--section-gap);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 32px;
}
.breadcrumb a {
  color: var(--accent-blue);
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: var(--accent-magenta);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 20px;
}
.section-label::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--accent-magenta);
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--bg-raised) 0%, var(--bg-surface) 100%);
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
}
.media-frame::before {
  content: attr(data-index);
  position: absolute;
  top: 8px;
  right: 10px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-blue);
  letter-spacing: 0.1em;
}
.media-frame::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-magenta), var(--accent-blue));
  opacity: 0;
  transition: opacity var(--transition);
}
.media-frame:hover::after {
  opacity: 1;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.1);
  transition: filter var(--transition), transform 0.5s ease;
}
.media-frame:hover img {
  filter: saturate(1.1) contrast(1.1);
  transform: scale(1.02);
}
.media-frame.portrait { aspect-ratio: 3 / 4; }
.media-frame.wide { aspect-ratio: 21 / 9; }

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  background: var(--bg-surface);
  border: 1px solid var(--line-color);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  border-color: var(--accent-magenta);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(255, 46, 136, 0.15);
}

.timeline {
  position: relative;
  padding-left: 24px;
  border-left: 2px solid var(--line-color);
}
.timeline-item {
  position: relative;
  padding: 0 0 32px 20px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -31px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--accent-blue);
  border: 2px solid var(--bg-base);
  transform: rotate(45deg);
}
.timeline-item:last-child {
  padding-bottom: 0;
}

.data-num {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 1;
  color: var(--accent-magenta);
  letter-spacing: 0.02em;
}

.scanline {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 100vh;
  z-index: 1500;
  pointer-events: none;
  overflow: hidden;
}
.scanline::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 90px;
  background: linear-gradient(to bottom, transparent, rgba(0, 212, 255, 0.025), transparent);
  animation: scanMove 4s linear infinite;
  will-change: transform;
}
@keyframes scanMove {
  0% { transform: translateY(-90px); }
  100% { transform: translateY(100vh); }
}

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand-block {
    grid-column: 1 / -1;
  }
}

@media (max-width: 960px) {
  :root {
    --header-h: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .header-shell {
    gap: 12px;
  }

  .nav-bar {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 999;
    margin-left: 0;
    background: rgba(19, 26, 38, 0.97);
    border-bottom: 1px solid var(--line-color);
    padding: 16px var(--container-pad) 24px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }
  .nav-bar[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 1rem;
    border-bottom: 1px solid rgba(43, 51, 68, 0.5);
  }
  .nav-link::after {
    display: none;
  }
  .nav-link[aria-current="page"] {
    background: rgba(255, 46, 136, 0.08);
    color: var(--accent-magenta);
    border-left: 3px solid var(--accent-magenta);
    padding-left: 13px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 1.15rem;
  }
  .brand-name { font-size: 1.02rem; }
  .brand-slogan { font-size: 0.56rem; }

  .site-header[data-scrolled] {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: rgba(11, 14, 20, 0.96);
  }
}

@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-brand-block {
    grid-column: auto;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-icp {
    margin-left: 0;
  }
}

@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;
  }
  .scanline {
    display: none;
  }
  .media-frame img,
  .card,
  .btn,
  .nav-link,
  .footer-link {
    transition: none;
  }
}