:root {
  --color-navy: #0A1F44;
  --color-navy-deep: #071426;
  --color-green: #39FF14;
  --color-orange: #FF6B1A;
  --color-mist: #F5F7FA;
  --color-slate: #2E3B4E;
  --color-ink: #1A1A1A;
  --color-white: #FFFFFF;
  --color-grayblue: #B0B8C8;
  --glass: rgba(255,255,255,0.08);
  --font-head: "Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-body: "Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --font-data: "Roboto Mono","JetBrains Mono","Courier New",monospace;
  --content-width: 1280px;
  --radius: 4px;
}

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

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

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

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

h1, h2, h3, h4 {
  font-family: var(--font-head);
}

a {
  color: inherit;
}

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

img {
  max-width: 100%;
  height: auto;
}

body {
  background-color: var(--color-mist);
  background-image:
    linear-gradient(rgba(10,31,68,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,31,68,0.035) 1px, transparent 1px);
  background-size: 36px 36px;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
}

#main-content {
  display: block;
  min-height: 60vh;
}

::selection {
  background: var(--color-green);
  color: var(--color-navy-deep);
}

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

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--color-orange);
}

@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;
  }
}

.container {
  width: min(100% - 48px, var(--content-width));
  margin-inline: auto;
}

.section {
  padding: 72px 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-navy);
}

.grid {
  display: grid;
  gap: 28px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.split-panel {
  min-width: 0;
}

.eyebrow {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-slate);
}

.page-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--color-ink);
}

.panel-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--color-ink);
}

.lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-slate);
  max-width: 62ch;
}

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

.prose p + p {
  margin-top: 1.25em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-data);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s, color .2s, border-color .2s, transform .2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-navy);
  color: var(--color-white);
  border-color: var(--color-navy);
}

.btn-primary:hover {
  background: var(--color-navy-deep);
  border-color: var(--color-green);
  color: var(--color-green);
}

.btn-ghost {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-slate);
}

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

.btn-green {
  background: var(--color-green);
  color: var(--color-navy-deep);
  border-color: var(--color-green);
}

.btn-green:hover {
  background: transparent;
  color: var(--color-green);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 32px;
  font-family: var(--font-data);
  font-size: 0.8125rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li:not(:first-child)::before {
  content: "/";
  margin: 0 10px;
  color: var(--color-grayblue);
}

.breadcrumb a {
  color: var(--color-slate);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-orange);
}

.breadcrumb [aria-current="page"] {
  color: var(--color-navy);
  font-weight: 700;
}

.data-card {
  position: relative;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--color-navy), var(--color-navy-deep));
  color: var(--color-white);
  padding: 28px;
  overflow: hidden;
  transition: transform .25s, border-color .25s;
}

.data-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 56px;
  height: 3px;
  background: var(--color-green);
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(57,255,20,0.45);
}

.data-value {
  display: block;
  font-family: var(--font-data);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-green);
}

.data-label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-grayblue);
}

.glass-card {
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 28px;
  color: var(--color-white);
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--color-orange);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-orange);
}

.tag-green {
  border-color: var(--color-green);
  color: var(--color-green);
}

.index-code {
  font-family: var(--font-data);
  font-size: clamp(4rem, 10vw, 9rem);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(10,31,68,0.22);
  user-select: none;
}

.image-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-navy), var(--color-navy-deep) 65%, var(--color-slate));
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(135deg, rgba(57,255,20,0.07) 0, rgba(57,255,20,0.07) 1px, transparent 1px, transparent 16px),
    radial-gradient(circle at 72% 28%, rgba(255,107,26,0.2), transparent 62%);
}

.image-frame::after {
  content: "IMAGE / 档案图版";
  position: absolute;
  right: 14px;
  bottom: 10px;
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.4);
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 1300;
  padding: 10px 18px;
  border-radius: var(--radius);
  background: var(--color-orange);
  color: var(--color-navy-deep);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform .25s ease;
}

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

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1200;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-green) 60%, var(--color-orange));
  pointer-events: none;
}

.site-header {
  position: relative;
  z-index: 100;
  background: var(--color-navy);
  color: var(--color-white);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.masthead {
  position: relative;
  width: min(100% - 48px, 1360px);
  margin-inline: auto;
}

.masthead-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 26px 0;
}

.masthead-slogan {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-grayblue);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 32px;
  padding: 0 6px;
  border: 2px solid var(--color-green);
  border-radius: var(--radius);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  color: var(--color-green);
}

.brand-name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.6rem;
  letter-spacing: 0.1em;
  color: var(--color-white);
  line-height: 1.2;
}

.masthead-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 12px;
}

.quick-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid rgba(57,255,20,0.45);
  border-radius: var(--radius);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-green);
  text-decoration: none;
  transition: background-color .2s, color .2s, border-color .2s;
}

.quick-switch:hover,
.quick-switch:focus-visible {
  background: var(--color-green);
  border-color: var(--color-green);
  color: var(--color-navy-deep);
}

.quick-switch-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-orange);
}

.main-nav {
  border-top: 1px solid rgba(255,255,255,0.1);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.02);
}

.menu-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.menu-list li + li a {
  border-left: 1px solid rgba(255,255,255,0.08);
}

.menu-list a {
  display: block;
  padding: 13px 22px;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--color-grayblue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s, background-color .2s;
}

.menu-list a:hover {
  color: var(--color-white);
  border-bottom-color: var(--color-orange);
}

.menu-list a[aria-current="page"] {
  color: var(--color-green);
  border-bottom-color: var(--color-green);
  background: rgba(57,255,20,0.07);
}

.nav-toggle {
  display: none;
}

.site-footer {
  position: relative;
  background: var(--color-navy-deep);
  color: var(--color-white);
  border-top: 3px solid var(--color-green);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(1200px 300px at 50% 0%, rgba(57,255,20,0.06), transparent 70%);
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr 1.05fr;
  gap: 56px;
  padding: 64px 0 48px;
}

.footer-brand .brand-lockup {
  justify-content: flex-start;
}

.footer-brand .brand-name {
  font-size: 1.25rem;
}

.footer-brand .brand-mark {
  min-width: 38px;
  height: 28px;
}

.footer-slogan {
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-grayblue);
}

.footer-statement {
  margin-top: 18px;
  padding-left: 16px;
  border-left: 3px solid var(--color-green);
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--color-grayblue);
  max-width: 46ch;
}

.footer-heading {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
}

.footer-link-list {
  display: grid;
  gap: 10px;
  margin-bottom: 26px;
}

.footer-link-list a,
.legal-link {
  color: var(--color-grayblue);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color .2s;
}

.footer-link-list a:hover,
.legal-link:hover {
  color: var(--color-green);
}

.contact-list {
  display: grid;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--color-grayblue);
}

.contact-label {
  display: inline-block;
  width: 3.6em;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--color-grayblue);
}

.contact-address {
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
}

.footer-bottom-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 0;
  font-size: 0.8125rem;
  color: var(--color-grayblue);
}

.copyright {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.icp {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.reveal[data-reveal] {
  transition: opacity .6s ease, transform .6s ease;
}

.js-anim .reveal[data-reveal]:not(.is-visible) {
  opacity: 0;
  transform: translateY(20px);
}

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

@media (prefers-reduced-motion: reduce) {
  .js-anim .reveal[data-reveal]:not(.is-visible),
  .reveal[data-reveal].is-visible {
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 900px) {
  .masthead {
    width: 100%;
  }

  .masthead-top {
    grid-template-columns: 1fr auto;
    gap: 0 16px;
    padding: 14px 16px;
  }

  .masthead-slogan {
    display: none;
  }

  .brand-name {
    font-size: 1.125rem;
  }

  .brand-mark {
    min-width: 36px;
    height: 26px;
    font-size: 0.8125rem;
  }

  .masthead-actions {
    gap: 8px;
  }

  .quick-switch {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: var(--radius);
    background: transparent;
    cursor: pointer;
  }

  .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-green);
    transition: transform .2s, opacity .2s;
  }

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

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

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

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    border-top: 0;
    box-shadow: 0 24px 40px rgba(0,0,0,0.35);
  }

  .main-nav[data-open] {
    display: block;
  }

  .menu-list {
    flex-direction: column;
    padding: 6px 0;
  }

  .menu-list li + li a {
    border-left: 0;
    border-top: 1px solid rgba(255,255,255,0.06);
  }

  .menu-list a {
    padding: 14px 24px;
    border-bottom: 0;
  }

  .menu-list a[aria-current="page"] {
    border-left: 3px solid var(--color-green);
    padding-left: 21px;
  }

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

  .split {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 48px 0 32px;
  }

  .footer-bottom-row {
    flex-direction: column;
    align-items: flex-start;
  }

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

@media (min-width: 901px) {
  .nav-toggle {
    display: none;
  }
}