:root {
  --bg-deep: #0A1428;
  --bg-panel: #0F1F3A;
  --bg-gradient: linear-gradient(160deg, #0A1428, #0F1F3A);
  --cyan: #00F0FF;
  --cyan-glass: rgba(0, 240, 255, 0.1);
  --cyan-border: rgba(0, 240, 255, 0.28);
  --orange: #FF6B35;
  --slate: #8A9BB5;
  --white: #FFFFFF;
  --danger: #FF3B3B;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', monospace;
  --font-display: clamp(2.5rem, 6vw, 5rem);
  --font-h1: clamp(2rem, 4vw, 3rem);
  --font-h2: clamp(1.5rem, 3vw, 2rem);
  --font-h3: clamp(1.2rem, 2vw, 1.5rem);
  --font-body: 1rem;
  --font-small: 0.875rem;
  --header-w: 280px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-body);
  line-height: 1.7;
  background: var(--bg-deep);
  color: var(--white);
  margin-left: var(--header-w);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(0, 240, 255, 0.07), transparent 32%),
    radial-gradient(circle at 88% 72%, rgba(255, 107, 53, 0.05), transparent 38%);
  pointer-events: none;
  z-index: 0;
}

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

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--white);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 900;
  line-height: 1.3;
  color: var(--white);
  letter-spacing: -0.01em;
}

h1 {
  font-size: var(--font-h1);
}

h2 {
  font-size: var(--font-h2);
}

h3 {
  font-size: var(--font-h3);
}

p {
  color: var(--slate);
}

ul,
ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

.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: -100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 500;
  padding: 12px 24px;
  background: var(--cyan);
  color: var(--bg-deep);
  font-weight: 800;
  font-size: 14px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: 0 8px 30px rgba(0, 240, 255, 0.3);
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 0;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--header-w);
  height: 100vh;
  background:
    radial-gradient(circle at 85% 18%, rgba(255, 107, 53, 0.08), transparent 42%),
    radial-gradient(circle at 15% 88%, rgba(0, 240, 255, 0.1), transparent 48%),
    var(--bg-gradient);
  border-right: 1px solid var(--cyan-border);
  display: flex;
  flex-direction: column;
  z-index: 200;
}

.header-brand {
  padding: 28px 24px 18px;
  flex-shrink: 0;
}

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

.brand-glyph {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--cyan-glass);
  border: 1px solid var(--cyan-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-glyph::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 5px;
}

.brand-glyph-core {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan), 0 0 26px rgba(0, 240, 255, 0.35);
  animation: livePulse 2s ease-in-out infinite;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-title {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--white);
}

.brand-sub {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--slate);
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.header-divider {
  height: 3px;
  flex-shrink: 0;
  background: repeating-linear-gradient(
    135deg,
    var(--cyan) 0 4px,
    transparent 4px 8px,
    var(--orange) 8px 12px,
    transparent 12px 16px
  );
  opacity: 0.35;
}

.site-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 20px 0 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 240, 255, 0.2) transparent;
}

.site-nav::-webkit-scrollbar {
  width: 4px;
}

.site-nav::-webkit-scrollbar-thumb {
  background: rgba(0, 240, 255, 0.2);
  border-radius: 2px;
}

.nav-head {
  padding: 0 24px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--slate);
  text-transform: uppercase;
}

.nav-live-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--slate);
}

.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: livePulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

.nav-list {
  flex: 1;
}

.nav-item + .nav-item {
  margin-top: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 24px;
  color: var(--slate);
  font-size: 15px;
  font-weight: 600;
  border-left: 2px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--white);
  background: var(--cyan-glass);
  border-left-color: var(--cyan);
}

.nav-link[aria-current="page"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.14), transparent 65%);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
  min-width: 22px;
  font-weight: 700;
}

.nav-arrow {
  margin-left: auto;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--transition), transform var(--transition);
  color: var(--cyan);
  font-size: 14px;
}

.nav-link:hover .nav-arrow,
.nav-link[aria-current="page"] .nav-arrow {
  opacity: 1;
  transform: translateX(0);
}

.header-entry {
  margin-top: auto;
  padding: 16px 24px 24px;
  flex-shrink: 0;
}

.temp-entry-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(255, 107, 53, 0.12));
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-md);
  color: var(--white);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.temp-entry-btn:hover {
  border-color: var(--cyan);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 240, 255, 0.18);
}

.temp-entry-icon {
  font-size: 20px;
  color: var(--cyan);
  line-height: 1;
}

.temp-entry-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.4;
}

.temp-entry-copy strong {
  font-size: 14px;
  letter-spacing: 0.02em;
  font-weight: 800;
}

.temp-entry-copy small {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--slate);
}

.nav-toggle {
  display: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(0, 240, 255, 0.08);
  z-index: 400;
  pointer-events: none;
}

.scroll-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan) 55%, var(--orange));
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.45);
  transition: width 0.1s linear;
}

.main-content {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 120px);
}

.container {
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 4vw, 48px);
  padding-right: clamp(20px, 4vw, 48px);
}

.page-section {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 32px;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 800;
  color: var(--orange);
  letter-spacing: 0.12em;
}

.section-title {
  font-size: var(--font-h2);
  font-weight: 900;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 800;
  font-family: var(--font-sans);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  line-height: 1.4;
}

.btn-primary {
  background: var(--cyan);
  color: var(--bg-deep);
}

.btn-primary:hover {
  background: var(--white);
  color: var(--bg-deep);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 240, 255, 0.25);
}

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

.btn-ghost:hover {
  background: var(--cyan-glass);
  color: var(--cyan);
  transform: translateY(-2px);
}

.breadcrumb {
  margin-bottom: 32px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--slate);
  opacity: 0.6;
}

.breadcrumb-link {
  color: var(--cyan);
}

.breadcrumb-link:hover {
  color: var(--white);
}

.breadcrumb-current {
  color: var(--slate);
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 24px;
}

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

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

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

.card {
  background: var(--cyan-glass);
  border: 1px solid rgba(0, 240, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 240, 255, 0.3);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.card-title {
  font-size: var(--font-h3);
  font-weight: 800;
  margin-bottom: 8px;
}

.card-text {
  color: var(--slate);
  font-size: 14px;
  line-height: 1.65;
}

.img-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.06), rgba(255, 107, 53, 0.06));
  border: 1px solid rgba(0, 240, 255, 0.15);
  border-radius: var(--radius-lg);
}

.img-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.img-frame[data-ratio="16/9"]::before {
  padding-top: 56.25%;
}

.img-frame[data-ratio="3/2"]::before {
  padding-top: 66.67%;
}

.img-frame[data-ratio="4/3"]::before {
  padding-top: 75%;
}

.img-frame[data-ratio="1/1"]::before {
  padding-top: 100%;
}

.img-frame[data-ratio="21/9"]::before {
  padding-top: 42.86%;
}

.img-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: center;
  padding: 16px;
}

.data-num,
.data-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

[data-scrollspy] {
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

[data-scrollspy].is-active {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.12), transparent 60%);
}

.site-footer {
  position: relative;
  z-index: 1;
  background:
    radial-gradient(circle at 90% 10%, rgba(0, 240, 255, 0.06), transparent 40%),
    linear-gradient(180deg, var(--bg-panel), #081120);
  border-top: 1px solid var(--cyan-border);
  margin-top: 80px;
  padding-bottom: 28px;
}

.footer-accent {
  height: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--orange), var(--cyan));
  background-size: 200% 100%;
  animation: gradientSlide 8s linear infinite;
  opacity: 0.7;
}

@keyframes gradientSlide {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 200% 50%;
  }
}

.footer-grid {
  max-width: 1440px;
  margin: 0 auto;
  padding: 56px clamp(20px, 4vw, 48px) 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.footer-brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--cyan), rgba(0, 240, 255, 0.2));
  color: var(--bg-deep);
  font-weight: 900;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
}

.footer-brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.footer-brand-name {
  font-size: 16px;
  font-weight: 900;
  color: var(--white);
  letter-spacing: 0.04em;
}

.footer-brand-domain {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--slate);
}

.footer-about {
  font-size: 14px;
  color: var(--slate);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--slate);
  font-size: 14px;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-links a:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-contact-value {
  font-size: 14px;
  color: var(--white);
  line-height: 1.5;
}

.footer-contact-note {
  margin-top: 14px;
  font-size: 12px;
  color: var(--slate);
  background: var(--cyan-glass);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  border-left: 2px solid var(--cyan);
}

.footer-bottom {
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px clamp(20px, 4vw, 48px) 0;
  border-top: 1px solid rgba(0, 240, 255, 0.1);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 13px;
  color: var(--slate);
}

.footer-icp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.footer-trust {
  margin-top: 12px;
  font-size: 12px;
  color: rgba(138, 155, 181, 0.7);
  line-height: 1.6;
  max-width: 900px;
}

@keyframes livePulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.82);
  }
}

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }
}

@media (max-width: 1023px) {
  body {
    margin-left: 0;
    padding-top: 64px;
  }

  .site-header {
    width: 100%;
    height: auto;
    min-height: 64px;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    padding: 0 16px;
    border-right: none;
    border-bottom: 1px solid var(--cyan-border);
    background:
      radial-gradient(circle at 90% 20%, rgba(255, 107, 53, 0.1), transparent 45%),
      radial-gradient(circle at 10% 20%, rgba(0, 240, 255, 0.12), transparent 45%),
      var(--bg-gradient);
  }

  .header-brand {
    flex: 1;
    padding: 10px 0;
    min-width: 0;
  }

  .brand-glyph {
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }

  .brand-glyph::before {
    inset: 5px;
  }

  .brand-glyph-core {
    width: 8px;
    height: 8px;
  }

  .brand-title {
    font-size: 17px;
  }

  .brand-sub {
    font-size: 10px;
  }

  .header-divider {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 64px;
    left: 0;
    bottom: 0;
    width: min(340px, 85vw);
    padding: 16px 0 0;
    background: var(--bg-gradient);
    border-right: 1px solid var(--cyan-border);
    box-shadow: 12px 0 40px rgba(0, 0, 0, 0.45);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 250;
  }

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

  .nav-head {
    padding: 0 20px 12px;
  }

  .nav-link {
    padding: 12px 20px;
  }

  .header-entry {
    padding: 14px 20px 24px;
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--cyan-border);
    border-radius: 10px;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    flex-shrink: 0;
  }

  .nav-toggle:hover {
    border-color: var(--cyan);
    background: var(--cyan-glass);
  }

  .nav-toggle-bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--cyan);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.2s ease;
  }

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

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

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

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 40px 20px 28px;
  }

  .footer-brand-about {
    max-width: 100%;
  }

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

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

@media (min-width: 768px) and (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-brand-block {
    grid-column: 1 / -1;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .live-dot,
  .brand-glyph-core,
  .footer-accent {
    animation: none !important;
  }
}