:root {
  --bg: #101214;
  --bg-deep: #090a0c;
  --panel: rgba(20, 23, 27, 0.82);
  --panel-strong: #171b20;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.18);
  --text: #f4efe7;
  --muted: #bbb1a3;
  --accent: #ff7a00;
  --accent-soft: #ffc16f;
  --steel: #87909b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 122, 0, 0.2), transparent 26%),
    radial-gradient(circle at 85% 10%, rgba(124, 138, 152, 0.16), transparent 18%),
    linear-gradient(180deg, #13161a 0%, #0d0f12 48%, #090a0c 100%);
  font-family: "Trebuchet MS", "Microsoft YaHei", sans-serif;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.site-shell {
  position: relative;
  overflow: clip;
}

.site-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.52), transparent 90%);
}

.topbar,
.section,
.ticker,
.footer {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 18px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 22px;
  margin-top: 18px;
  background: rgba(12, 14, 17, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
  font: 700 1rem/1 "Bahnschrift SemiCondensed", "DIN Alternate", sans-serif;
  letter-spacing: 0.08em;
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong,
.site-nav,
.button,
.eyebrow,
.news-date,
.metric-value,
.filter-button,
.solution-tag,
.footer p:first-child {
  font-family: "Bahnschrift SemiCondensed", "DIN Alternate", "Microsoft YaHei", sans-serif;
  letter-spacing: 0.06em;
}

.brand-copy strong {
  font-size: 1rem;
  font-weight: 700;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.site-nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-nav a,
.nav-cta,
.nav-toggle,
.button,
.filter-button {
  transition: transform 180ms ease, color 180ms ease, border-color 180ms ease,
    background-color 180ms ease, opacity 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.nav-cta:hover,
.nav-cta:focus-visible,
.button:hover,
.button:focus-visible,
.filter-button:hover,
.filter-button:focus-visible {
  color: var(--text);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  padding: 10px 14px;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.nav-cta {
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
  font-weight: 700;
}

.section {
  padding: 86px 0 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 42px;
  padding-top: 72px;
}

.hero-copy h1,
.section-heading h2,
.contact-copy h2 {
  margin: 0;
  font: 700 clamp(2.5rem, 4vw, 4.7rem) / 1.02 "Bahnschrift SemiCondensed",
    "DIN Alternate", "Microsoft YaHei", sans-serif;
  text-wrap: balance;
}

.hero-text,
.section-heading p,
.portal-copy p,
.tech-card p,
.solution-card p,
.news-list p,
.map-copy p,
.contact-copy p,
.contact-note {
  color: var(--muted);
  line-height: 1.72;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  color: var(--accent-soft);
  font-size: 0.84rem;
  text-transform: uppercase;
}

.hero-text {
  margin: 22px 0 0;
  max-width: 58ch;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 168px;
  padding: 15px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.96rem;
  font-weight: 700;
}

.button-primary {
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
}

.button-secondary {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.metric-card,
.hero-aside,
.portal-card,
.tech-panel,
.solution-card,
.news-panel,
.map-panel,
.contact-panel {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 100%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.metric-card {
  padding: 22px 18px;
}

.metric-value {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--accent-soft);
}

.metric-label {
  color: var(--muted);
  font-size: 0.95rem;
}

.hero-visual {
  position: relative;
}

.hero-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 36px;
  box-shadow: var(--shadow);
}

.hero-frame::after,
.portal-media::after,
.tech-visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 38%;
  background: linear-gradient(180deg, transparent, rgba(8, 10, 12, 0.78));
}

.hero-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-aside {
  position: absolute;
  right: -20px;
  bottom: -28px;
  width: min(320px, 78%);
  padding: 24px;
}

.aside-label {
  margin: 0 0 10px;
  color: var(--accent-soft);
  font-size: 0.84rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-aside h2 {
  margin: 0;
  font: 700 clamp(1.35rem, 2vw, 1.7rem) / 1.14 "Bahnschrift SemiCondensed",
    "DIN Alternate", sans-serif;
}

.aside-list {
  margin: 16px 0 0;
  padding: 0 0 0 18px;
  color: var(--muted);
  line-height: 1.7;
}

.ticker {
  margin-top: 84px;
  padding: 16px 0;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.ticker-track {
  display: flex;
  gap: 28px;
  width: max-content;
  color: var(--muted);
  font: 700 0.95rem/1 "Bahnschrift SemiCondensed", "DIN Alternate", sans-serif;
  text-transform: uppercase;
  animation: ticker-drift 26s linear infinite;
}

.ticker-track span::before {
  content: "•";
  margin-right: 12px;
  color: var(--accent);
}

@keyframes ticker-drift {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

.section-heading {
  display: grid;
  gap: 10px;
  max-width: 740px;
  margin-bottom: 30px;
}

.section-heading h2 {
  font-size: clamp(2rem, 3.2vw, 3.3rem);
}

.section-heading p {
  margin: 0;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.portal-card {
  position: relative;
  overflow: hidden;
  min-height: 460px;
}

.portal-card-large {
  grid-column: span 2;
  min-height: 420px;
}

.portal-media,
.tech-visual {
  position: relative;
  overflow: hidden;
  border-radius: inherit;
  height: 100%;
}

.portal-media img,
.tech-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.portal-copy {
  position: absolute;
  inset: auto 0 0;
  z-index: 1;
  padding: 26px;
}

.portal-copy h3,
.tech-card h3,
.solution-card h3,
.news-list h4,
.map-copy h3,
.news-head h3 {
  margin: 0;
  font: 700 clamp(1.5rem, 2vw, 2rem) / 1.12 "Bahnschrift SemiCondensed",
    "DIN Alternate", sans-serif;
}

.portal-copy p {
  margin: 12px 0 0;
  max-width: 48ch;
}

.portal-spec {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 20px 0 0;
}

.portal-spec div {
  min-width: 130px;
}

.portal-spec dt {
  color: var(--steel);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.portal-spec dd {
  margin: 8px 0 0;
  font-size: 1rem;
}

.technology-section {
  position: relative;
}

.tech-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 24px;
  align-items: stretch;
}

.tech-visual {
  min-height: 560px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.tech-panel {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.tech-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.tech-index {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
  font: 700 1rem/1 "Bahnschrift SemiCondensed", "DIN Alternate", sans-serif;
}

.tech-card p {
  margin: 10px 0 0;
}

.tech-meter {
  margin-top: 8px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.025);
}

.tech-meter > div:nth-of-type(odd) {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
}

.tech-meter > div:nth-of-type(1) {
  margin-top: 0;
}

.meter-bar {
  width: 100%;
  height: 10px;
  margin-top: 10px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
}

.meter-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
}

.solution-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.filter-button {
  padding: 12px 18px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}

.filter-button.is-active {
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
  border-color: transparent;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.solution-card {
  padding: 24px;
}

.solution-card.is-hidden {
  display: none;
}

.solution-tag {
  margin: 0 0 12px;
  color: var(--accent-soft);
  font-size: 0.84rem;
  text-transform: uppercase;
}

.solution-card p:last-child {
  margin-bottom: 0;
}

.network-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  gap: 22px;
}

.news-panel,
.map-panel,
.contact-panel {
  padding: 28px;
}

.news-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: baseline;
  margin-bottom: 18px;
}

.news-head span {
  color: var(--steel);
}

.news-list {
  display: grid;
  gap: 18px;
}

.news-list article {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.news-list article:first-child {
  padding-top: 0;
  border-top: 0;
}

.news-date {
  margin: 2px 0 0;
  color: var(--accent-soft);
  font-size: 0.92rem;
}

.news-list h4 {
  font-size: 1.18rem;
}

.news-list p {
  margin: 8px 0 0;
}

.map-panel {
  display: grid;
  gap: 22px;
}

.map-copy h3 {
  margin-top: 8px;
}

.map-board {
  position: relative;
  min-height: 280px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 30% 40%, rgba(255, 122, 0, 0.22), transparent 18%),
    radial-gradient(circle at 70% 58%, rgba(255, 193, 111, 0.14), transparent 22%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0));
}

.map-board::before {
  content: "";
  position: absolute;
  inset: 20px;
  border-radius: 20px;
  border: 1px dashed rgba(255, 255, 255, 0.08);
}

.map-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-soft);
  box-shadow: 0 0 0 10px rgba(255, 122, 0, 0.09);
}

.dot-a {
  top: 28%;
  left: 26%;
}

.dot-b {
  top: 46%;
  left: 58%;
}

.dot-c {
  top: 66%;
  left: 37%;
}

.dot-d {
  top: 22%;
  left: 72%;
}

.map-line {
  position: absolute;
  height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(255, 193, 111, 0.72), transparent);
}

.line-a {
  top: 32%;
  left: 28%;
  width: 34%;
  transform: rotate(17deg);
}

.line-b {
  top: 56%;
  left: 40%;
  width: 28%;
  transform: rotate(-19deg);
}

.map-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.map-stats div {
  padding: 16px 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.025);
}

.map-stats strong {
  display: block;
  margin-bottom: 6px;
  color: var(--accent-soft);
  font: 700 1.5rem/1 "Bahnschrift SemiCondensed", "DIN Alternate", sans-serif;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: center;
}

.contact-note {
  margin: 14px 0 0;
  font-size: 0.92rem;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0 48px;
  margin-top: 84px;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 720ms ease, transform 720ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero,
  .tech-grid,
  .network-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .hero-aside {
    position: relative;
    right: auto;
    bottom: auto;
    width: 100%;
    margin-top: 18px;
  }

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

  .portal-card-large {
    grid-column: span 2;
  }
}

@media (max-width: 820px) {
  .topbar,
  .section,
  .ticker,
  .footer {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .topbar {
    flex-wrap: wrap;
    border-radius: 28px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 14px;
    padding-top: 6px;
  }

  .site-nav.is-open {
    display: flex;
  }

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

  .hero {
    padding-top: 44px;
  }

  .metric-grid,
  .map-stats {
    grid-template-columns: 1fr;
  }

  .portal-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .portal-card-large {
    grid-column: span 1;
  }

  .portal-card,
  .portal-card-large {
    min-height: 360px;
  }

  .news-head,
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 600px) {
  .topbar {
    padding: 14px 16px;
  }

  .brand {
    width: 100%;
  }

  .nav-cta {
    margin-left: 0;
  }

  .section {
    padding-top: 72px;
  }

  .hero-copy h1,
  .section-heading h2,
  .contact-copy h2 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .tech-card,
  .news-list article {
    grid-template-columns: 1fr;
  }

  .news-date {
    margin-top: 0;
  }

  .contact-panel,
  .news-panel,
  .map-panel {
    padding: 22px;
  }
}