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

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

body {
  background: var(--color-bg);
  color: var(--color-cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { list-style: none; }
a { color: inherit; }
[hidden] { display: none !important; }

/* ===== CSS Variables ===== */
:root {
  --color-bg: #0A0E14;
  --color-bg-alt: #111820;
  --color-bg-deep: #060910;
  --color-neon: #39FF14;
  --color-electric: #00E5FF;
  --color-hot: #FF3D00;
  --color-gray: #8A9CA8;
  --color-cream: #F5F0E6;
  --color-moss: #4E6E58;
  --color-terra: #C67B5C;

  --font-heading: 'Anton', Impact, 'Noto Sans SC', 'Arial Narrow', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SF Mono', Menlo, Consolas, monospace;

  --content-w: 1280px;
  --header-h: 64px;
  --radius: 4px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 0.3s ease;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-cream);
  transform: skewX(-2deg);
  line-height: 1.2;
  letter-spacing: 0.02em;
}
h1 { font-size: 44px; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
h4 { font-size: 20px; }

.section-title {
  font-size: 32px;
  line-height: 1.25;
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 52px;
  height: 3px;
  background: var(--color-neon);
  transform: skewX(-20deg);
}
.section-subtitle {
  color: var(--color-gray);
  font-size: 15px;
  font-family: var(--font-body);
  transform: none;
}

/* ===== Accessibility ===== */
:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  padding: 12px 24px;
  background: var(--color-neon);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.3s var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
}

/* ===== Layout ===== */
.container {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 64px 0; }
.section-tight { padding: 32px 0; }

.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)); }

/* ===== Scroll Progress ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  pointer-events: none;
  background: rgba(138, 156, 168, 0.15);
}
.scroll-progress-bar {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-neon), var(--color-electric) 80%);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
  transition: width 0.1s linear;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.97);
  border-bottom: 1px solid rgba(57, 255, 20, 0.1);
}

.header-ticker {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 36px;
  background: var(--color-bg-deep);
  border-bottom: 1px solid rgba(138, 156, 168, 0.12);
  overflow: hidden;
}
.ticker-tag {
  flex-shrink: 0;
  margin-left: 12px;
  padding: 2px 10px;
  background: var(--color-hot);
  color: var(--color-cream);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transform: skewX(-8deg);
  border-radius: 2px;
}
.ticker-viewport {
  flex: 1;
  min-width: 0;
  height: 100%;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker-move 36s linear infinite;
}
.ticker-group {
  display: flex;
  align-items: center;
  gap: 48px;
  padding-right: 48px;
}
.ticker-item {
  font-size: 12px;
  color: var(--color-gray);
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.ticker-item::before {
  content: '▸ ';
  color: var(--color-electric);
  font-family: var(--font-data);
}
@keyframes ticker-move {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.header-main {
  position: relative;
}
.header-main::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 120px;
  height: 4px;
  background: linear-gradient(270deg, var(--color-hot), transparent);
  opacity: 0.45;
  pointer-events: none;
}

.header-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* Brand */
.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.brand-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transform: skewX(-4deg);
  color: var(--color-cream);
}
.brand-sub {
  font-family: var(--font-data);
  font-size: 9px;
  letter-spacing: 0.36em;
  color: var(--color-gray);
  margin-top: 5px;
}

/* Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 160;
  background: transparent;
  border: 1px solid rgba(138, 156, 168, 0.2);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color 0.3s ease;
}
.nav-toggle:hover { border-color: var(--color-neon); }
.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-cream);
  transition: transform 0.3s var(--ease), opacity 0.3s ease;
}
.nav-toggle[data-open] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[data-open] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[data-open] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Site Nav Desktop */
.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-item {
  position: relative;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 400;
  color: var(--color-gray);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: currentColor;
  transform: scaleX(0) skewX(-24deg);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-link:hover {
  color: var(--color-electric);
}
.nav-link:hover::after {
  transform: scaleX(1) skewX(-24deg);
}
.nav-link[aria-current="page"] {
  color: var(--color-neon);
}
.nav-link[aria-current="page"]::after {
  transform: scaleX(1) skewX(-24deg);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.4);
}

.nav-secondary {
  margin-left: 8px;
  padding-left: 20px;
  border-left: 1px solid rgba(138, 156, 168, 0.2);
}
.nav-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border: 1px solid var(--color-neon);
  border-radius: 2px;
  background: rgba(57, 255, 20, 0.08);
  color: var(--color-neon);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: skewX(-4deg);
  transition: color 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}
.nav-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-neon);
  transform: translateX(-101%);
  transition: transform 0.35s var(--ease);
}
.nav-cta:hover::before {
  transform: translateX(0);
}
.nav-cta:hover {
  color: var(--color-bg);
  border-color: var(--color-neon);
}
.nav-cta > span {
  position: relative;
  z-index: 1;
}
.nav-cta-icon {
  font-size: 12px;
}

.nav-meta {
  display: none;
  margin-top: auto;
  padding-top: 20px;
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--color-gray);
  line-height: 1.8;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 10, 0.64);
  z-index: 140;
}

/* ===== Site Nav Mobile ===== */
@media (max-width: 960px) {
  .header-inner {
    height: 56px;
    padding: 0 16px;
  }
  .brand-mark { width: 30px; height: 30px; }
  .brand-name { font-size: 19px; }
  .brand-sub { display: none; }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(340px, 88vw);
    margin: 0;
    padding: 88px 28px 40px;
    background: var(--color-bg-deep);
    border-left: 1px solid rgba(57, 255, 20, 0.15);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    transform: translateX(105%);
    transition: transform 0.5s var(--ease);
    overflow-y: auto;
    z-index: 150;
  }
  .site-nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-neon) 0%, var(--color-electric) 60%, var(--color-hot) 100%);
  }
  .site-nav[data-open] {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-item {
    width: 100%;
  }
  .nav-link {
    display: block;
    width: 100%;
    padding: 14px 12px;
    font-size: 17px;
    color: var(--color-cream);
    border-bottom: 1px solid rgba(138, 156, 168, 0.08);
  }
  .nav-link::after {
    display: none;
  }
  .nav-link:hover {
    color: var(--color-electric);
    background: rgba(0, 229, 255, 0.04);
  }
  .nav-link[aria-current="page"] {
    color: var(--color-neon);
    padding-left: 20px;
    border-left: 2px solid var(--color-neon);
    background: rgba(57, 255, 20, 0.04);
  }

  .nav-secondary {
    margin-top: 28px;
    padding-top: 28px;
    padding-left: 0;
    border-left: none;
    border-top: 1px solid rgba(138, 156, 168, 0.15);
  }
  .nav-cta {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
    font-size: 14px;
  }

  .nav-meta {
    display: block;
  }
}

@media (min-width: 961px) {
  .nav-overlay {
    display: none !important;
  }
}

body.nav-lock {
  overflow: hidden;
}

/* ===== Footer ===== */
.site-footer {
  position: relative;
  margin-top: 80px;
  background: var(--color-bg-deep);
  border-top: 1px solid rgba(78, 110, 88, 0.3);
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-neon) 0%, var(--color-electric) 45%, var(--color-hot) 80%, transparent 100%);
  opacity: 0.7;
}
.site-footer::after {
  content: 'YIZHAO';
  position: absolute;
  right: -20px;
  bottom: 40px;
  font-family: var(--font-heading);
  font-size: 120px;
  color: rgba(138, 156, 168, 0.04);
  transform: skewX(-8deg);
  pointer-events: none;
  z-index: 0;
  letter-spacing: 0.08em;
}

.footer-inner,
.footer-bottom {
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 64px 24px 48px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.footer-brand-col {
  min-width: 0;
}
.footer-col {
  min-width: 0;
  position: relative;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 20px;
}
.footer-brand .brand-mark {
  width: 30px;
  height: 30px;
}
.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transform: skewX(-4deg);
  color: var(--color-cream);
}

.footer-trust {
  max-width: 360px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--color-gray);
  border-left: 2px solid var(--color-moss);
  padding-left: 16px;
}

.footer-heading {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-electric);
  transform: none;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(78, 110, 88, 0.4);
}

.footer-link-list li {
  margin-bottom: 10px;
}
.footer-link-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-gray);
  text-decoration: none;
  transition: color 0.3s ease;
}
.footer-link-list a::before {
  content: '▸';
  font-family: var(--font-data);
  color: var(--color-hot);
  font-size: 11px;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.footer-link-list a:hover {
  color: var(--color-neon);
}
.footer-link-list a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-contact-list {
  display: grid;
  gap: 12px;
}
.footer-contact-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 10px;
  align-items: baseline;
}
.footer-contact-label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-moss);
}
.footer-contact-value {
  font-size: 13px;
  color: var(--color-cream);
  word-break: break-all;
  line-height: 1.5;
}

.footer-service-note {
  margin-top: 20px;
  font-size: 11px;
  line-height: 1.7;
  color: var(--color-gray);
  padding-top: 16px;
  border-top: 1px solid rgba(78, 110, 88, 0.2);
}

.footer-bottom {
  border-top: 1px solid rgba(138, 156, 168, 0.1);
}
.footer-bottom-inner {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 32px;
  font-size: 12px;
  color: var(--color-gray);
}
.footer-copy {
  font-family: var(--font-data);
  letter-spacing: 0.08em;
}
.footer-icp {
  font-family: var(--font-data);
}
.footer-domain {
  margin-left: auto;
  font-family: var(--font-data);
  color: var(--color-moss);
}

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}
@media (max-width: 560px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-bottom-inner {
    justify-content: flex-start;
  }
  .footer-domain {
    margin-left: 0;
  }
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 80;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 20, 0.9);
  border: 1px solid var(--color-neon);
  border-radius: 2px;
  color: var(--color-neon);
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s var(--ease), background 0.3s ease;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--color-neon);
  color: var(--color-bg);
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.45);
}
.back-to-top[hidden] {
  display: none !important;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 2px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s var(--ease);
  transform: skewX(-2deg);
}
.btn-primary {
  background: var(--color-neon);
  color: var(--color-bg);
}
.btn-primary:hover {
  box-shadow: 0 0 28px rgba(57, 255, 20, 0.4);
  transform: skewX(-2deg) translateY(-2px);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--color-electric);
  color: var(--color-electric);
}
.btn-outline:hover {
  background: rgba(0, 229, 255, 0.12);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
}
.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-gray);
  color: var(--color-gray);
}
.btn-ghost:hover {
  border-color: var(--color-cream);
  color: var(--color-cream);
}

/* ===== Badge ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: 2px;
  transform: skewX(-6deg);
}
.badge-hot {
  background: var(--color-hot);
  color: var(--color-cream);
}
.badge-tech {
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.45);
  color: var(--color-electric);
}
.badge-data {
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid rgba(57, 255, 20, 0.4);
  color: var(--color-neon);
}
.badge-warm {
  background: rgba(198, 123, 92, 0.15);
  border: 1px solid rgba(198, 123, 92, 0.4);
  color: var(--color-terra);
}

/* ===== Card ===== */
.card {
  position: relative;
  padding: 24px;
  background: linear-gradient(160deg, rgba(78, 110, 88, 0.14), rgba(10, 14, 20, 0.5));
  border: 1px solid rgba(78, 110, 88, 0.22);
  border-radius: var(--radius);
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.card:hover {
  border-color: rgba(57, 255, 20, 0.3);
  transform: translateY(-4px);
}
.card-title {
  font-family: var(--font-heading);
  font-size: 20px;
  margin-bottom: 10px;
}
.card-body {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0;
  font-size: 13px;
}
.breadcrumb-link {
  color: var(--color-gray);
  text-decoration: none;
  transition: color 0.3s ease;
}
.breadcrumb-link:hover {
  color: var(--color-electric);
}
.breadcrumb-sep {
  color: var(--color-moss);
  font-family: var(--font-data);
  font-size: 11px;
}
.breadcrumb [aria-current="page"] {
  color: var(--color-cream);
}

/* ===== Data Value ===== */
.data-value {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--color-neon);
  letter-spacing: 0.02em;
}

/* ===== Divider ===== */
.divider {
  height: 1px;
  border: none;
  margin: 32px 0;
  background: linear-gradient(90deg, transparent, var(--color-moss), transparent);
}
.divider-slash {
  border: none;
  height: 3px;
  margin: 40px 0;
  background: linear-gradient(90deg, var(--color-neon) 0%, var(--color-electric) 65%, transparent 100%);
  transform: skewX(-20deg);
  transform-origin: left;
}

/* ===== Image Frame ===== */
.img-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-bg-alt), var(--color-bg-deep) 70%);
  border: 1px solid rgba(78, 110, 88, 0.3);
}
.img-frame::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -20%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.12), transparent 70%);
  z-index: 1;
  pointer-events: none;
}
.img-frame::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 42%;
  background: linear-gradient(180deg, var(--color-neon), var(--color-electric));
  opacity: 0.6;
  z-index: 1;
  pointer-events: none;
}
.img-frame img,
.img-frame .img-placeholder {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-bg-alt), var(--color-bg-deep));
  color: var(--color-moss);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
}
.img-frame .img-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 32px 16px 14px;
  background: linear-gradient(transparent, rgba(6, 9, 16, 0.9));
  font-size: 13px;
  color: var(--color-cream);
}

/* ===== Tree Path ===== */
.tree-path {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.tree-node {
  position: relative;
  padding: 16px 0 16px 30px;
  border-left: 1px solid var(--color-moss);
  margin-left: 10px;
}
.tree-node::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 24px;
  width: 9px;
  height: 9px;
  background: var(--color-bg);
  border: 2px solid var(--color-electric);
  transform: rotate(45deg);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.tree-node.active::before {
  border-color: var(--color-neon);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}
.tree-node-title {
  font-weight: 600;
  font-size: 15px;
  color: var(--color-cream);
}
.tree-node-desc {
  font-size: 13px;
  color: var(--color-gray);
  margin-top: 4px;
  line-height: 1.6;
}

/* ===== Decorative Effects ===== */
.clip-slice {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), 0 100%);
}
.corner-accent {
  position: relative;
}
.corner-accent::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 32px solid var(--color-neon);
  border-left: 32px solid transparent;
  opacity: 0.5;
}

/* ===== Reveal ===== */
.reveal-init {
  opacity: 0;
  transform: translateY(28px);
}
.reveal-init.revealed {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s var(--ease);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  .section-title { font-size: 28px; }
}

@media (max-width: 768px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .container { padding: 0 16px; }
  .footer-inner { padding: 48px 16px 36px; }
  .footer-bottom-inner { padding: 16px; }
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  .section-title { font-size: 26px; }
}

/* ===== Reduced Motion ===== */
@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;
  }
  .ticker-track {
    animation: none !important;
  }
  .reveal-init {
    opacity: 1;
    transform: none;
  }
  .reveal-init.revealed {
    transition: none;
  }
}