:root {
  --deep-space-blue: #0A1128;
  --card-blue: #1A2240;
  --neon-green: #39FF14;
  --energy-orange: #FF6A00;
  --text-primary: #FFFFFF;
  --text-secondary: #A0B0D0;
  --data-gold: #FFD700;
  --glow-blue: #00C6FF;

  --font-headline: "Noto Sans SC", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --font-body: "Source Sans Pro", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --header-h: 72px;
  --max-width: 1280px;
  --radius-card: 10px;
  --transition-fast: 0.3s;
  --transition-mid: 0.5s;
  --transition-slow: 0.8s;
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--deep-space-blue);
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
}

#main-content {
  flex: 1;
  width: 100%;
  outline: none;
  scroll-margin-top: var(--header-h);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.18;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

h1 { font-size: clamp(36px, 6vw, 60px); }
h2 { font-size: clamp(26px, 4vw, 40px); }
h3 { font-size: clamp(20px, 2.5vw, 28px); }
h4 { font-size: 18px; }

p { margin: 0; }

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

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

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

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}

::selection {
  background: var(--neon-green);
  color: var(--deep-space-blue);
}

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

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 300;
  background: var(--neon-green);
  color: var(--deep-space-blue);
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 12px 20px;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: top 0.3s ease;
}

.skip-link:focus-visible {
  top: 16px;
  outline: 2px solid var(--text-primary);
  outline-offset: 4px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  z-index: 250;
  background: linear-gradient(90deg, var(--neon-green), var(--glow-blue), var(--energy-orange));
  transform-origin: 0 50%;
  transform: scaleX(0);
  pointer-events: none;
  will-change: transform;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.content-block { padding: 80px 0; }
.content-block-sm { padding: 40px 0; }
.content-block-lg { padding: 120px 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 17, 40, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(57, 255, 20, 0.18);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 16%;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-green), transparent);
  transform: skewX(-24deg);
  pointer-events: none;
}

.header-inner {
  max-width: var(--max-width);
  height: var(--header-h);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo svg {
  width: 72px;
  height: auto;
  filter: drop-shadow(0 0 10px rgba(57, 255, 20, 0.35));
  transition: filter 0.3s ease;
}

.site-brand:hover .brand-logo svg {
  filter: drop-shadow(0 0 16px rgba(57, 255, 20, 0.6));
}

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand-name {
  display: inline-block;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: 2px;
  text-transform: uppercase;
  transform: skew(-3deg);
}

.brand-name::after {
  content: "";
  display: block;
  width: 26px;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-green), var(--energy-orange));
  transform: skewX(-24deg);
  margin-top: 2px;
}

.brand-tagline {
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: 1.5px;
  line-height: 1.2;
  margin-top: 4px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: var(--energy-orange);
  transform: skewX(-28deg) scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.3s ease;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: skewX(-28deg) scaleX(1);
}

.nav-link-cta {
  margin-left: 10px;
  background: var(--neon-green);
  color: var(--deep-space-blue);
  font-weight: 800;
  padding: 11px 26px;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: background-color 0.25s ease, color 0.25s ease;
}

.nav-link-cta:hover,
.nav-link-cta[aria-current="page"] {
  background: var(--energy-orange);
  color: var(--deep-space-blue);
}

.nav-link-cta::after {
  display: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid rgba(160, 176, 208, 0.35);
  padding: 8px 14px;
  border-radius: 4px;
  transition: border-color 0.25s ease;
}

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

.nav-toggle-box {
  position: relative;
  width: 18px;
  height: 14px;
}

.nav-toggle-inner,
.nav-toggle-inner::before,
.nav-toggle-inner::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--neon-green);
  transition: transform 0.3s ease, background-color 0.3s ease, top 0.3s ease;
}

.nav-toggle-inner { top: 6px; }
.nav-toggle-inner::before { top: -6px; }
.nav-toggle-inner::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-inner {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-inner::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-inner::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-toggle-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  position: relative;
  transition: transform 0.3s ease, background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary {
  background: var(--neon-green);
  color: var(--deep-space-blue);
  clip-path: polygon(12px 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  box-shadow: 0 0 0 rgba(57, 255, 20, 0);
}

.btn-primary:hover {
  transform: translateX(4px);
  box-shadow: 0 6px 28px rgba(57, 255, 20, 0.35);
}

.btn-secondary {
  background: rgba(26, 34, 64, 0.55);
  border: 1px solid var(--energy-orange);
  color: var(--text-primary);
  border-radius: 4px;
}

.btn-secondary:hover {
  background: rgba(255, 106, 0, 0.15);
  transform: translateX(4px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  margin-bottom: 32px;
}

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

.breadcrumb li + li::before {
  content: "→";
  margin: 0 10px;
  color: var(--energy-orange);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.25s ease;
}

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

.breadcrumb li:last-child {
  color: var(--text-primary);
}

.section-head {
  margin-bottom: 48px;
  max-width: 720px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  color: var(--neon-green);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 12px;
}

.section-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--energy-orange);
  transform: skewX(-24deg);
}

.section-title {
  display: inline-block;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.5px;
  transform: skew(-3deg);
}

.section-sub {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.skew-title {
  display: inline-block;
  transform: skew(-3deg);
}

.grid {
  display: grid;
  gap: 24px;
}

.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 {
  position: relative;
  background: linear-gradient(160deg, rgba(26, 34, 64, 0.95), rgba(16, 22, 46, 0.95));
  border: 1px solid rgba(160, 176, 208, 0.15);
  border-radius: var(--radius-card);
  padding: 24px;
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -4px;
  width: 44px;
  height: 4px;
  background: linear-gradient(90deg, var(--energy-orange), transparent);
  transform: skewX(-28deg);
  transform-origin: 0 0;
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(57, 255, 20, 0.45);
  box-shadow: 0 14px 36px rgba(0, 198, 255, 0.14);
}

.data-number {
  font-family: var(--font-data);
  font-size: 18px;
  font-weight: 500;
  color: var(--neon-green);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
}

.data-gold {
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--data-gold);
  font-variant-numeric: tabular-nums;
}

.data-text {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.image-placeholder {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid rgba(160, 176, 208, 0.16);
  background:
    linear-gradient(rgba(57, 255, 20, 0.05), transparent),
    repeating-linear-gradient(-45deg, rgba(160, 176, 208, 0.03) 0, rgba(160, 176, 208, 0.03) 2px, transparent 2px, transparent 14px),
    linear-gradient(135deg, var(--card-blue), #0D162E);
}

.image-placeholder::before {
  content: attr(data-label);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: rgba(10, 17, 40, 0.72);
  border: 1px solid rgba(57, 255, 20, 0.25);
  padding: 8px 16px;
  z-index: 1;
}

.image-placeholder::after {
  content: "";
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 26px;
  height: 26px;
  border-right: 2px solid var(--energy-orange);
  border-bottom: 2px solid var(--energy-orange);
  opacity: 0.8;
}

.image-placeholder[data-ratio="wide"] { aspect-ratio: 21 / 9; }
.image-placeholder[data-ratio="portrait"] { aspect-ratio: 4 / 5; }
.image-placeholder[data-ratio="square"] { aspect-ratio: 1 / 1; }
.image-placeholder[data-ratio="hero"] { aspect-ratio: 16 / 6; }

.glow-orb {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-blue), transparent 68%);
  opacity: 0.22;
  filter: blur(64px);
  pointer-events: none;
}

.glow-orb[data-color="green"] {
  background: radial-gradient(circle, var(--neon-green), transparent 68%);
  opacity: 0.14;
}

.glow-orb[data-color="orange"] {
  background: radial-gradient(circle, var(--energy-orange), transparent 68%);
  opacity: 0.16;
}

.diag-band {
  height: 6px;
  background: repeating-linear-gradient(-45deg, rgba(57, 255, 20, 0.6) 0, rgba(57, 255, 20, 0.6) 2px, transparent 2px, transparent 10px);
  opacity: 0.4;
}

.site-footer {
  position: relative;
  background: linear-gradient(180deg, #0A1128 0%, #050A19 100%);
  border-top: 1px solid rgba(160, 176, 208, 0.14);
  padding-top: 64px;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  height: 3px;
  width: 42%;
  background: linear-gradient(90deg, var(--neon-green), var(--energy-orange), var(--glow-blue));
  transform: skewX(-24deg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 0.9fr 1.3fr;
  gap: 48px 40px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-brand-col,
.footer-col,
.footer-links-col,
.footer-help-col,
.footer-contact-col {
  min-width: 0;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
}

.footer-brand .brand-name {
  font-size: 20px;
}

.footer-tagline {
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--neon-green);
  letter-spacing: 1px;
}

.trust-statement {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-secondary);
  border-left: 3px solid var(--energy-orange);
  padding-left: 12px;
}

.footer-heading {
  font-family: var(--font-headline);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-primary);
  padding-left: 12px;
  position: relative;
  margin-bottom: 20px;
}

.footer-heading::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  bottom: 3px;
  width: 3px;
  background: linear-gradient(180deg, var(--neon-green), var(--energy-orange));
  transform: skewX(-24deg);
}

.footer-link-list li + li {
  margin-top: 10px;
}

.footer-link-list a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-link-list a:hover {
  color: var(--neon-green);
  padding-left: 6px;
}

.contact-label {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--neon-green);
  margin-right: 10px;
  width: 30px;
}

.footer-contact-line {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 8px;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 56px auto 0;
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  border-top: 1px solid rgba(160, 176, 208, 0.12);
}

.footer-copy,
.footer-icp {
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-icp {
  font-family: var(--font-data);
  letter-spacing: 1px;
}

.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--neon-green);
  background: rgba(26, 34, 64, 0.88);
  border: 1px solid rgba(57, 255, 20, 0.55);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s ease, background-color 0.25s ease, color 0.25s ease;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--neon-green);
  color: var(--deep-space-blue);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 960px) {
  .grid-4,
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 880px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    margin: 0;
    background: rgba(8, 14, 34, 0.98);
    border-bottom: 3px solid var(--neon-green);
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.45);
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-14px);
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s ease;
  }

  .header-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    display: block;
    padding: 13px 16px;
    font-size: 16px;
    border-bottom: 1px solid rgba(160, 176, 208, 0.08);
  }

  .nav-link::after {
    left: 16px;
    right: auto;
    width: 28px;
    bottom: 6px;
  }

  .nav-link-cta {
    margin: 16px 0 0;
    text-align: center;
    clip-path: none;
    border-radius: 4px;
    padding: 14px 16px;
    border-bottom: none;
  }
}

@media (max-width: 600px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    padding: 20px 16px;
  }
}

@media (max-width: 480px) {
  .brand-tagline {
    display: none;
  }

  .brand-name {
    font-size: 19px;
  }

  .brand-logo svg {
    width: 58px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
  }
}

@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;
  }
}