:root {
  --deep-green-950: #0B2D1E;
  --primary-green-700: #1B6E3D;
  --vivid-green-500: #2FA853;
  --soft-green-300: #8FD4A8;
  --pale-green-100: #E6F4EA;
  --accent-orange-500: #FF5A36;
  --ink-gray-900: #1A1E1A;
  --muted-gray-600: #5C6B5A;
  --white: #FFFFFF;
  --line-gray-300: #C9D4C9;
  --font-heading: "PingFang SC", "Microsoft YaHei", "Arial", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Arial", sans-serif;
  --font-mono: "Roboto Mono", "Consolas", "SFMono-Regular", "Menlo", monospace;
  --header-h: 4.5rem;
  --container-max: 1280px;
}

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

html {
  background: var(--pale-green-100);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding-top: var(--header-h);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink-gray-900);
  background: var(--pale-green-100);
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

main {
  display: block;
}

#main-content {
  flex: 1;
  outline: none;
  scroll-margin-top: calc(var(--header-h) + 0.5rem);
}

h1,
h2,
h3,
h4,
h5 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.15;
  color: var(--ink-gray-900);
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--primary-green-700);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

img {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

::selection {
  background: var(--accent-orange-500);
  color: var(--white);
}

:focus-visible {
  outline: 3px solid var(--accent-orange-500);
  outline-offset: 3px;
}

.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: 0.5rem;
  left: 0.5rem;
  z-index: 2000;
  padding: 0.75rem 1rem;
  background: var(--accent-orange-500);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-320%);
  transition: transform 0.2s ease;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(11, 45, 30, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(11, 45, 30, 0.96);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.22);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--accent-orange-500) 0 24px, transparent 24px 48px, var(--vivid-green-500) 48px 72px, transparent 72px 96px);
  opacity: 0.85;
  pointer-events: none;
}

.header-inner {
  position: relative;
  z-index: 2;
  width: min(var(--container-max), 100% - 2rem);
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: var(--white);
}

.brand-mark {
  width: 2.3rem;
  height: 2.3rem;
  display: inline-grid;
  place-items: center;
  background: var(--accent-orange-500);
  color: var(--deep-green-950);
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 0.95rem;
  box-shadow: 4px 4px 0 var(--vivid-green-500);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  color: var(--soft-green-300);
  text-transform: uppercase;
}

.site-nav {
  visibility: visible;
  position: static;
  width: auto;
  max-height: none;
  overflow: visible;
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
}

.nav-link {
  position: relative;
  display: block;
  padding: 0.55rem 0.75rem;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  transition: color 0.18s ease;
}

.nav-link::before {
  content: attr(data-index) " / ";
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-orange-500);
  margin-right: 0.35rem;
  vertical-align: 0.08em;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.15rem;
  height: 2px;
  background: var(--accent-orange-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--white);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--white);
}

.nav-link[aria-current="page"]::before {
  color: var(--accent-orange-500);
}

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.4rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 2px solid rgba(255, 255, 255, 0.55);
}

.nav-toggle-line {
  width: 20px;
  height: 2px;
  background: var(--white);
  display: block;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.nav-toggle[aria-expanded="true"] .is-mid {
  opacity: 0;
}

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

.header-progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  z-index: 3;
  height: 3px;
  width: 0;
  background: var(--accent-orange-500);
  box-shadow: 0 0 10px rgba(255, 90, 54, 0.65);
  pointer-events: none;
}

.site-footer {
  position: relative;
  margin-top: auto;
  background: var(--deep-green-950);
  color: rgba(255, 255, 255, 0.72);
  border-top: 6px solid var(--primary-green-700);
}

.site-footer::after {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--accent-orange-500) 0 28px, transparent 28px 56px, var(--vivid-green-500) 56px 84px, transparent 84px 112px);
  opacity: 0.9;
  pointer-events: none;
}

.footer-inner {
  width: min(var(--container-max), 100% - 2rem);
  margin-inline: auto;
  padding: 3rem 0 2rem;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.8fr) minmax(0, 0.8fr) minmax(0, 1.1fr);
  gap: 2rem;
}

.footer-brand {
  min-width: 0;
}

.footer-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--white);
}

.footer-mark {
  width: 2.7rem;
  height: 2.7rem;
  display: inline-grid;
  place-items: center;
  background: var(--accent-orange-500);
  color: var(--deep-green-950);
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.05rem;
  box-shadow: 5px 5px 0 var(--vivid-green-500);
}

.footer-name {
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.footer-tagline {
  margin-top: 1rem;
  color: var(--accent-orange-500);
  font-weight: 700;
  letter-spacing: 0.16em;
}

.footer-statement {
  max-width: 32em;
  margin-top: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.62);
}

.footer-col {
  min-width: 0;
}

.footer-heading {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--soft-green-300);
  border-bottom: 2px solid rgba(255, 255, 255, 0.14);
}

.footer-list {
  display: grid;
  gap: 0.5rem;
  list-style: none;
}

.footer-list a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.68);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--white);
  border-color: var(--accent-orange-500);
}

.footer-contact-list {
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-icp {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.3rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.74);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.2rem 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.48);
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

.container {
  width: min(var(--container-max), 100% - clamp(1.5rem, 4vw, 3rem));
  margin-inline: auto;
}

.section {
  position: relative;
  padding: clamp(4rem, 8vw, 6.5rem) clamp(1.25rem, 4vw, 2.5rem);
}

.section--dark {
  background: var(--deep-green-950);
  color: rgba(255, 255, 255, 0.78);
}

.section--pale {
  background: var(--pale-green-100);
}

.section--tint {
  background: var(--soft-green-300);
}

.section--dark .section-title {
  color: var(--white);
}

.section--dark .section-lead {
  color: rgba(255, 255, 255, 0.72);
}

.section--dark .section-kicker {
  color: var(--accent-orange-500);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  font-weight: 700;
  color: var(--accent-orange-500);
  text-transform: uppercase;
}

.section-kicker::before {
  content: "";
  width: 2.2rem;
  height: 4px;
  background: var(--accent-orange-500);
  display: inline-block;
}

.section-title {
  max-width: 18em;
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--ink-gray-900);
}

.section-lead {
  max-width: 42em;
  margin-top: 1rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted-gray-600);
}

.poster {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  min-height: calc(100vh - var(--header-h));
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1.25rem, 5vw, 3.5rem);
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--pale-green-100) 0%, var(--pale-green-100) 68%, var(--deep-green-950) 68%, var(--deep-green-950) 100%);
  border-bottom: 6px solid var(--accent-orange-500);
  isolation: isolate;
}

.poster::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: repeating-linear-gradient(-8deg, transparent 0 18px, rgba(47, 168, 83, 0.14) 18px 22px, transparent 22px 42px, rgba(255, 90, 54, 0.12) 42px 46px);
  pointer-events: none;
}

.poster::after {
  content: "";
  position: absolute;
  right: -4rem;
  bottom: -4rem;
  width: 20rem;
  height: 20rem;
  border: 2rem solid rgba(47, 168, 83, 0.26);
  transform: rotate(-14deg);
  pointer-events: none;
}

.poster-copy {
  position: relative;
  z-index: 1;
}

.poster-kicker {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  font-weight: 700;
  color: var(--primary-green-700);
  text-transform: uppercase;
}

.poster-kicker::before {
  content: "";
  width: 2.6rem;
  height: 4px;
  background: var(--accent-orange-500);
}

.poster-title {
  max-width: 9em;
  font-size: clamp(3.2rem, 10vw, 6.8rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--ink-gray-900);
}

.poster-title .accent {
  color: var(--accent-orange-500);
}

.poster-sub {
  max-width: 34em;
  margin-top: 1.5rem;
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  line-height: 1.7;
  color: var(--muted-gray-600);
}

.poster-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.poster-side {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-content: center;
}

.poster-block {
  min-height: 8rem;
  padding: 1.25rem;
  background: var(--deep-green-950);
  border: 2px solid var(--deep-green-950);
  box-shadow: 8px 8px 0 var(--vivid-green-500);
  color: var(--white);
}

.poster-block .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-orange-500);
}

.poster-block .label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--soft-green-300);
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  border: 2px solid var(--primary-green-700);
  font-family: var(--font-heading);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--accent-orange-500);
  border-color: var(--accent-orange-500);
  color: var(--deep-green-950);
  box-shadow: 5px 5px 0 var(--deep-green-950);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--primary-green-700);
  border-color: var(--primary-green-700);
  color: var(--white);
  transform: translateY(-3px);
  box-shadow: 7px 7px 0 var(--deep-green-950);
}

.btn-outline {
  background: transparent;
  border-color: var(--primary-green-700);
  color: var(--primary-green-700);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--accent-orange-500);
  color: var(--accent-orange-500);
  transform: translateY(-3px);
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--white);
  border: 2px solid var(--line-gray-300);
  box-shadow: 6px 6px 0 var(--soft-green-300);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  border-color: var(--vivid-green-500);
  box-shadow: 8px 8px 0 var(--soft-green-300);
}

.card-pad {
  padding: 1.5rem;
}

.data-card {
  padding: 1.5rem;
  background: var(--pale-green-100);
  border: 2px solid var(--primary-green-700);
  border-top: 6px solid var(--accent-orange-500);
  box-shadow: 8px 8px 0 var(--deep-green-950);
}

.data-card__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-orange-500);
}

.data-card__label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.875rem;
  color: var(--muted-gray-600);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border: 2px solid var(--line-gray-300);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.data-table th,
.data-table td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--line-gray-300);
  text-align: left;
}

.data-table th {
  color: var(--primary-green-700);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.data-table tbody tr {
  transition: background 0.15s ease;
}

.data-table tbody tr:hover {
  background: var(--pale-green-100);
}

.timeline {
  position: relative;
  margin: 2rem 0;
  padding-left: 1.5rem;
  border-left: 3px solid var(--primary-green-700);
  list-style: none;
  display: grid;
  gap: 2rem;
}

.timeline-item {
  position: relative;
  padding-left: 1.5rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.72rem;
  top: 0.25rem;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: var(--accent-orange-500);
  border: 3px solid var(--deep-green-950);
}

.timeline-time {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-orange-500);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 1.5rem 0 0;
  font-size: 0.85rem;
  color: var(--muted-gray-600);
}

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

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--line-gray-300);
}

.breadcrumbs a {
  color: var(--primary-green-700);
  font-weight: 600;
  text-decoration: none;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--accent-orange-500);
}

.breadcrumbs a[aria-current="page"] {
  color: var(--muted-gray-600);
  font-weight: 400;
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--deep-green-950);
  border: 2px solid var(--primary-green-700);
  box-shadow: 8px 8px 0 var(--soft-green-300);
  aspect-ratio: 16 / 9;
}

.media-frame img,
.media-frame video,
.media-frame .media-placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame .media-placeholder {
  display: grid;
  place-items: center;
  color: var(--soft-green-300);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
}

.speed-lines {
  position: relative;
  overflow: hidden;
}

.speed-lines::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-8deg, transparent 0 16px, rgba(47, 168, 83, 0.18) 16px 20px, transparent 20px 40px, rgba(255, 90, 54, 0.14) 40px 44px);
  pointer-events: none;
  opacity: 0.85;
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

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

@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    z-index: 900;
    width: min(20rem, 86vw);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 1rem 1.5rem 2rem;
    background: var(--deep-green-950);
    border-left: 4px solid var(--accent-orange-500);
    box-shadow: -12px 0 24px rgba(0, 0, 0, 0.3);
    visibility: hidden;
    transform: translateX(105%);
    transition: transform 0.25s ease, visibility 0.25s ease;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    padding: 0.875rem 0.5rem;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-link::before {
    font-size: 0.72rem;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem 1.5rem;
  }

  .poster {
    grid-template-columns: 1fr;
  }

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

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 4rem;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .brand-sub {
    font-size: 0.52rem;
  }

  .brand-mark {
    width: 2rem;
    height: 2rem;
    font-size: 0.85rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .poster-side {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    padding: 1.2rem 1rem;
    text-align: left;
  }
}

@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;
  }

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

  .site-nav {
    transition: none;
  }

  .header-progress {
    transition: none;
  }
}