:root {
  --doc-bg-start: #050505;
  --doc-bg-mid: #0f0f20;
  --doc-bg-end: #101830;
  --doc-text: #f8fafc;
  --doc-muted: #d1d5db;
  --doc-subtle: #9ca3af;
  --doc-cyan: #22d3ee;
  --doc-blue: #60a5fa;
  --doc-indigo: #818cf8;
  --doc-pink: #f472b6;
  --doc-line: rgba(255, 255, 255, 0.1);
  --doc-card: rgba(0, 0, 0, 0.42);
  --doc-card-strong: rgba(8, 47, 73, 0.46);
}

body.doc-page {
  min-height: 100vh;
  overflow-x: hidden;
  background: linear-gradient(135deg, var(--doc-bg-start) 0%, var(--doc-bg-mid) 48%, var(--doc-bg-end) 100%);
  color: var(--doc-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.doc-page::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 8%, rgba(34, 211, 238, 0.12), transparent 30%),
    radial-gradient(circle at 82% 0%, rgba(129, 140, 248, 0.14), transparent 34%);
}

.doc-bg-animation {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.7;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: linear-gradient(45deg, #00d4ff, #7b68ee);
  opacity: 0.7;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

@keyframes doc-glow {
  from {
    filter: drop-shadow(0 0 18px rgba(0, 212, 255, 0.26));
  }

  to {
    filter: drop-shadow(0 0 34px rgba(123, 104, 238, 0.42));
  }
}

body.doc-page main {
  position: relative;
  z-index: 1;
}

body.doc-page .back {
  color: #67e8f9;
  font-weight: 700;
  text-decoration: none;
}

body.doc-page .back:hover {
  color: #a5f3fc;
  text-decoration: none;
}

body.doc-page .doc-topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 68px;
}

body.doc-page .doc-topbar .back {
  margin-bottom: 0;
  white-space: nowrap;
}

body.doc-page .doc-switcher {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

body.doc-page .doc-switch {
  display: block;
  min-width: 210px;
  border: 1px solid var(--doc-line);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.34);
  padding: 10px 14px 12px;
  text-decoration: none;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
  backdrop-filter: blur(10px);
}

body.doc-page .doc-switch:hover {
  border-color: rgba(34, 211, 238, 0.5);
  background: rgba(8, 47, 73, 0.42);
  box-shadow: 0 14px 34px rgba(0, 212, 255, 0.1);
  text-decoration: none;
  transform: translateY(-1px);
}

body.doc-page .doc-switch span {
  display: block;
  margin-bottom: 3px;
  color: #67e8f9;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

body.doc-page .doc-switch strong {
  display: block;
  color: #fff;
  font-size: 14px;
  line-height: 1.35;
}

body.doc-page h1 {
  background: linear-gradient(90deg, var(--doc-cyan), var(--doc-indigo), var(--doc-pink));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  letter-spacing: 0;
  animation: doc-glow 2s ease-in-out infinite alternate;
}

body.doc-page h2 {
  color: #fff;
  letter-spacing: 0;
}

body.doc-page h3,
body.doc-page strong {
  color: #fff;
}

body.doc-page p,
body.doc-page li,
body.doc-page td,
body.doc-page span {
  color: var(--doc-muted);
}

body.doc-page .eyebrow {
  color: #67e8f9;
  letter-spacing: 0.2em;
}

body.doc-page .lead,
body.doc-page .intro {
  color: #e5e7eb;
}

body.doc-page .hero {
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.doc-page .card,
body.doc-page .block,
body.doc-page .summary-card,
body.doc-page .scenario,
body.doc-page .step,
body.doc-page .table-wrap,
body.doc-page .faq,
body.doc-page .note,
body.doc-page .notice,
body.doc-page .answer,
body.doc-page .do,
body.doc-page .dont,
body.doc-page .cta {
  border-color: var(--doc-line);
  background: var(--doc-card);
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.22);
}

body.doc-page .answer,
body.doc-page .cta,
body.doc-page .support,
body.doc-page .recommended,
body.doc-page .do {
  border-color: rgba(34, 211, 238, 0.28);
  background: linear-gradient(180deg, rgba(8, 47, 73, 0.5), rgba(0, 0, 0, 0.36));
}

body.doc-page .dont,
body.doc-page .unsupported,
body.doc-page .notice,
body.doc-page .note {
  border-color: rgba(251, 191, 36, 0.26);
  background: linear-gradient(180deg, rgba(120, 53, 15, 0.22), rgba(0, 0, 0, 0.34));
}

body.doc-page th {
  color: #e0f2fe;
  background: rgba(255, 255, 255, 0.06);
}

body.doc-page td {
  color: #d1d5db;
}

body.doc-page .button {
  background: linear-gradient(90deg, #06b6d4, #6366f1);
  color: #fff;
  box-shadow: 0 0 18px rgba(0, 212, 255, 0.32);
}

body.doc-page .button:hover {
  filter: brightness(1.1);
}

@media (prefers-reduced-motion: reduce) {
  .particle,
  body.doc-page h1 {
    animation: none;
  }
}

@media (max-width: 760px) {
  body.doc-page .doc-topbar {
    margin-bottom: 46px;
    flex-direction: column;
  }

  body.doc-page .doc-switcher {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  body.doc-page .doc-switch {
    min-width: 0;
  }
}

@media (max-width: 520px) {
  body.doc-page .doc-switcher {
    grid-template-columns: 1fr;
  }
}