:root {
  --c-deep: #0B1B3A;
  --c-orange: #FF6B35;
  --c-green: #00C48C;
  --c-ash: #3E3E42;
  --c-moss: #4A7C59;
  --c-terra: #C67B5C;
  --c-cream: #F2EDE4;
  --c-stone: #D8D4CB;
  --font-title: "Segoe UI Black", "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", sans-serif;
  --font-mono: "Cascadia Mono", "Consolas", "SFMono-Regular", monospace;
  --radius-cut: 0 12px 0 12px;
}

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

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

body, h1, h2, h3, h4, p, ul, ol, figure {
  margin: 0;
}

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

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-cream);
  background-color: var(--c-deep);
  background-image:
    linear-gradient(rgba(242, 237, 228, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 237, 228, 0.02) 1px, transparent 1px);
  background-size: 64px 64px;
}

::selection {
  background: var(--c-orange);
  color: var(--c-deep);
}

h1, h2, h3 {
  font-family: var(--font-title);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

h1 {
  font-size: clamp(40px, 7vw, 64px);
  line-height: 1.02;
}

h2 {
  font-size: clamp(28px, 5vw, 44px);
}

h3 {
  font-size: clamp(20px, 3vw, 28px);
}

a {
  color: var(--c-green);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--c-orange);
}

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

.ky-container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 28px;
}

.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;
}

.ky-skip {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 2000;
  display: inline-block;
  background: var(--c-orange);
  color: var(--c-deep);
  padding: 12px 20px;
  font-family: var(--font-title);
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 10px 0;
}

.ky-skip:focus {
  left: 0;
  color: var(--c-deep);
}

.ky-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 27, 58, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(216, 212, 203, 0.1);
}

.ky-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto auto;
  width: 260px;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(255, 107, 53, 0.12), transparent 65%);
  pointer-events: none;
}

.ky-header-status {
  background: rgba(242, 237, 228, 0.05);
  border-bottom: 1px solid rgba(216, 212, 203, 0.08);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.ky-header-status-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin-inline: auto;
  padding: 6px 28px;
}

.ky-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ky-status--online {
  color: var(--c-green);
}

.ky-status-time {
  color: var(--c-stone);
}

.ky-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  animation: ky-pulse 2s ease infinite;
}

@keyframes ky-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(0, 196, 140, 0.45);
  }
  50% {
    box-shadow: 0 0 0 5px rgba(0, 196, 140, 0);
  }
}

.ky-header-main {
  position: relative;
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.ky-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-cream);
  font-family: var(--font-title);
}

.ky-brand:hover {
  color: var(--c-cream);
}

.ky-brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--c-orange);
  color: var(--c-deep);
  font-size: 1.25rem;
  font-weight: 900;
  border-radius: 0 10px 0 10px;
}

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

.ky-brand-text strong {
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

.ky-brand-text em {
  font-style: normal;
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--c-green);
  text-transform: uppercase;
}

.ky-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.ky-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 8px 12px;
  color: var(--c-stone);
  text-decoration: none;
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.ky-nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 100%;
  bottom: 2px;
  height: 2px;
  background: var(--c-orange);
  transition: right 0.25s ease;
}

.ky-nav a:hover {
  color: var(--c-cream);
  background: rgba(242, 237, 228, 0.04);
}

.ky-nav a:hover::after {
  right: 12px;
}

.ky-nav a[aria-current="page"] {
  color: var(--c-cream);
}

.ky-nav a[aria-current="page"]::after {
  right: 12px;
  background: var(--c-green);
}

.ky-nav-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--c-orange);
  letter-spacing: 0.05em;
}

.ky-nav a[aria-current="page"] .ky-nav-index {
  color: var(--c-green);
}

.ky-header-cta {
  display: inline-flex;
  align-items: center;
  background: var(--c-green);
  color: var(--c-deep);
  padding: 0.55rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  border-radius: 0 10px 0 10px;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.ky-header-cta::before {
  content: "→";
  margin-right: 6px;
}

.ky-header-cta:hover {
  color: var(--c-deep);
  filter: brightness(1.08);
  transform: scale(0.97);
}

.ky-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-stone);
  background: transparent;
  cursor: pointer;
  border-radius: 0 10px 0 10px;
  place-items: center;
}

.ky-nav-toggle-box {
  display: grid;
  gap: 5px;
  width: 20px;
}

.ky-nav-toggle-box i {
  display: block;
  height: 2px;
  background: var(--c-cream);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

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

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

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

.ky-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 3px;
  background: rgba(242, 237, 228, 0.06);
  pointer-events: none;
}

.ky-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--c-orange), var(--c-green));
  transition: width 0.1s linear;
}

.ky-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.65rem 1.5rem;
  background: var(--c-orange);
  color: var(--c-deep);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1rem;
  border: 0;
  text-decoration: none;
  letter-spacing: 0.02em;
  cursor: pointer;
  border-radius: 0 12px 0 12px;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.ky-btn:hover {
  color: var(--c-deep);
  filter: brightness(1.08);
  transform: translateY(-2px);
}

.ky-btn:active {
  transform: translateY(0);
}

.ky-btn--ghost {
  background: transparent;
  color: var(--c-cream);
  border: 1px solid var(--c-stone);
}

.ky-breadcrumb {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  margin-bottom: 32px;
  background: rgba(11, 27, 58, 0.6);
  border-left: 3px solid var(--c-orange);
  border-radius: 0 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.ky-breadcrumb a {
  color: var(--c-stone);
  text-decoration: none;
}

.ky-breadcrumb a:hover {
  color: var(--c-orange);
}

.ky-breadcrumb span {
  color: var(--c-cream);
}

.ky-panel {
  position: relative;
  margin-bottom: 40px;
  padding: 32px;
  background: linear-gradient(135deg, rgba(62, 62, 66, 0.5), rgba(62, 62, 66, 0.16));
  border: 1px solid rgba(216, 212, 203, 0.1);
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 100%, 32px 100%);
}

.ky-panel::before {
  content: attr(data-label);
  position: absolute;
  top: 0;
  left: 0;
  background: var(--c-orange);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 4px 12px;
  text-transform: uppercase;
  border-radius: 0 0 10px 0;
}

.ky-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.ky-grid > .ky-span-4 { grid-column: span 4; }
.ky-grid > .ky-span-6 { grid-column: span 6; }
.ky-grid > .ky-span-8 { grid-column: span 8; }
.ky-grid > .ky-span-12 { grid-column: span 12; }

.ky-data {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 20px;
  color: var(--c-stone);
  background: rgba(0, 196, 140, 0.05);
  border-left: 3px solid var(--c-green);
  padding: 14px 16px;
}

.ky-data strong {
  color: var(--c-green);
  font-weight: 600;
}

.ky-prose {
  max-width: 720px;
  margin-inline: auto;
}

.ky-prose p {
  margin-bottom: 1.4em;
  color: var(--c-stone);
}

.ky-prose h2 {
  margin: 2em 0 0.5em;
}

.ky-img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--c-ash);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 100%, 28px 100%);
}

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

.ky-img-frame--square::before {
  padding-top: 100%;
}

.ky-img-frame--tall::before {
  padding-top: 120%;
}

.ky-img-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ky-footer {
  position: relative;
  margin-top: 80px;
  background-color: var(--c-deep);
  background-image: radial-gradient(circle at 15% 100%, rgba(0, 196, 140, 0.06), transparent 40%);
  border-top: 1px solid rgba(216, 212, 203, 0.12);
}

.ky-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange) 0 30%, var(--c-terra) 30% 55%, var(--c-green) 55% 100%);
}

.ky-footer-cut {
  height: 16px;
  background: linear-gradient(100deg, var(--c-terra) 0 70%, transparent 70%);
  opacity: 0.7;
}

.ky-telemetry {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(216, 212, 203, 0.15);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.ky-tele-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ky-tele-path span {
  color: var(--c-cream);
}

.ky-footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 48px 0 36px;
}

.ky-footer-brand p {
  margin-top: 16px;
  max-width: 34ch;
  color: var(--c-stone);
  font-size: 14px;
  line-height: 1.7;
}

.ky-brand--footer .ky-brand-mark {
  background: var(--c-green);
}

.ky-brand--footer strong {
  color: var(--c-cream);
}

.ky-footer-nav h2,
.ky-footer-service h2,
.ky-footer-qr h2 {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.ky-footer-nav a,
.ky-footer-service a {
  display: block;
  padding: 5px 0;
  color: var(--c-stone);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, padding-left 0.2s ease, border-color 0.2s ease;
}

.ky-footer-nav a:hover,
.ky-footer-service a:hover {
  color: var(--c-green);
  padding-left: 8px;
  border-bottom-color: rgba(0, 196, 140, 0.35);
}

.ky-qr-box {
  position: relative;
  width: 104px;
  height: 104px;
  background-color: var(--c-cream);
  background-image: radial-gradient(rgba(62, 62, 66, 0.9) 1.2px, transparent 1.5px);
  background-size: 10px 10px;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.3);
}

.ky-qr-marker {
  position: absolute;
  width: 22px;
  height: 22px;
  background: var(--c-deep);
  box-shadow: inset 0 0 0 4px var(--c-cream);
}

.ky-qr-marker--tl { top: 6px; left: 6px; }
.ky-qr-marker--tr { top: 6px; right: 6px; }
.ky-qr-marker--bl { bottom: 6px; left: 6px; }
.ky-qr-marker--br { bottom: 6px; right: 6px; }

.ky-qr-logo {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  background: var(--c-deep);
  color: var(--c-green);
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 900;
  border-radius: 3px;
}

.ky-qr-note {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.ky-footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 20px 0 32px;
  border-top: 1px solid rgba(216, 212, 203, 0.1);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-stone);
}

.ky-footer-bottom p {
  margin: 0;
}

.ky-top-btn {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 900;
  width: 44px;
  height: 44px;
  border: 0;
  cursor: pointer;
  background: var(--c-ash);
  color: var(--c-cream);
  border-radius: 0 10px 0 10px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, background 0.2s ease;
}

.ky-top-btn::before {
  content: "↑";
  font-family: var(--font-mono);
  font-size: 20px;
}

.ky-top-btn[data-visible] {
  opacity: 1;
  pointer-events: auto;
}

.ky-top-btn:hover {
  background: var(--c-orange);
  color: var(--c-deep);
}

@media (max-width: 1024px) {
  .ky-nav-toggle {
    display: grid;
  }

  .ky-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 999;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 20px;
    background: rgba(11, 27, 58, 0.98);
    border-bottom: 3px solid var(--c-orange);
    border-radius: 0 0 0 18px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .ky-nav[data-open] {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .ky-nav a {
    padding: 12px;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(242, 237, 228, 0.06);
  }

  .ky-nav a::after {
    display: none;
  }

  .ky-grid > .ky-span-4,
  .ky-grid > .ky-span-6,
  .ky-grid > .ky-span-8 {
    grid-column: span 6;
  }

  .ky-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 680px) {
  .ky-header-status-time {
    display: none;
  }

  .ky-header-main {
    gap: 12px;
  }

  .ky-brand-text strong {
    font-size: 1.05rem;
  }

  .ky-header-cta {
    font-size: 0.68rem;
    padding: 0.5rem 0.8rem;
  }

  .ky-container {
    padding-inline: 20px;
  }

  .ky-header-status-inner {
    padding-inline: 20px;
  }

  .ky-grid > * {
    grid-column: span 12;
  }

  .ky-footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

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

  html {
    scroll-behavior: auto;
  }

  .ky-dot {
    animation: none;
  }
}