:root {
  --brand-primary: #2563eb;
  --brand-secondary: #7c3aed;
  --brand-accent: #06b6d4;
  --brand-warm: #f59e0b;
  --bg-body: #f4f6fb;
  --bg-surface: #ffffff;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-nav: rgba(255, 255, 255, 0.78);
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --border-soft: rgba(17, 24, 39, 0.08);
  --border-strong: rgba(17, 24, 39, 0.14);
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.06);
  --shadow-md: 0 8px 24px rgba(17, 24, 39, 0.08);
  --shadow-lg: 0 20px 48px rgba(17, 24, 39, 0.12);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --gradient-brand: linear-gradient(135deg, #2563eb 0%, #7c3aed 52%, #06b6d4 100%);
  --gradient-soft: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.12));
  --gradient-banner: linear-gradient(120deg, #0f172a 0%, #1e3a8a 34%, #6d28d9 68%, #0891b2 100%);
  --gradient-card: linear-gradient(160deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.66));
  --glass-blur: saturate(180%) blur(18px);
  --transition-fast: 0.2s ease;
  --transition-base: 0.34s cubic-bezier(0.22, 0.61, 0.36, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
  --max-width: 1200px;
  --space-section: clamp(2.5rem, 6vw, 5rem);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand-primary: #60a5fa;
    --brand-secondary: #a78bfa;
    --brand-accent: #22d3ee;
    --brand-warm: #fbbf24;
    --bg-body: #070b18;
    --bg-surface: #0f1629;
    --bg-elevated: rgba(21, 30, 52, 0.72);
    --bg-nav: rgba(12, 18, 34, 0.78);
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-soft: rgba(241, 245, 249, 0.09);
    --border-strong: rgba(241, 245, 249, 0.16);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 24px 56px rgba(0, 0, 0, 0.6);
    --gradient-soft: linear-gradient(135deg, rgba(96, 165, 250, 0.16), rgba(167, 139, 250, 0.16));
    --gradient-banner: linear-gradient(120deg, #020617 0%, #1e1b4b 34%, #4c1d95 68%, #155e75 100%);
    --gradient-card: linear-gradient(160deg, rgba(30, 41, 66, 0.9), rgba(15, 22, 41, 0.72));
  }
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-body);
  background-image:
    radial-gradient(1200px 600px at 10% -10%, rgba(37, 99, 235, 0.14), transparent 60%),
    radial-gradient(1000px 520px at 100% 0%, rgba(124, 58, 237, 0.14), transparent 60%),
    radial-gradient(900px 480px at 50% 100%, rgba(6, 182, 212, 0.1), transparent 65%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--brand-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 3px;
  border-radius: 6px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.6em;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(1.75rem, 4.2vw, 2.75rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  position: relative;
  padding-bottom: 0.5rem;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
}

p {
  margin: 0 0 1em;
  color: var(--text-secondary);
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.45em;
}

blockquote {
  margin: 1.2em 0;
  padding: 1rem 1.4rem;
  border-left: 4px solid var(--brand-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--gradient-soft);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--text-secondary);
  font-style: italic;
}

blockquote p {
  margin: 0;
}

code,
pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

pre {
  padding: 1rem 1.2rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  overflow-x: auto;
}

::selection {
  background: rgba(37, 99, 235, 0.24);
  color: var(--text-primary);
}

/* ============ Header / Banner ============ */
header[role="banner"] {
  position: relative;
  padding: clamp(2.5rem, 7vw, 5rem) clamp(1rem, 5vw, 3rem) clamp(3rem, 8vw, 6rem);
  margin-bottom: var(--space-section);
  color: #f8fafc;
  background: var(--gradient-banner);
  background-size: 200% 200%;
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  overflow: hidden;
  animation: bannerShift 18s ease-in-out infinite;
  isolation: isolate;
}

header[role="banner"]::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 15% 20%, rgba(255, 255, 255, 0.18), transparent 70%),
    radial-gradient(500px 260px at 85% 80%, rgba(6, 182, 212, 0.28), transparent 70%),
    radial-gradient(420px 220px at 70% 10%, rgba(124, 58, 237, 0.32), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

header[role="banner"]::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 78%);
  pointer-events: none;
  z-index: -1;
  opacity: 0.7;
}

header[role="banner"] h1 {
  max-width: 980px;
  margin: 0 auto 1rem;
  color: #ffffff;
  text-align: center;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.32);
  animation: fadeUp 0.8s var(--transition-slow) both;
}

header[role="banner"] > p {
  max-width: 860px;
  margin: 0 auto 2rem;
  color: rgba(248, 250, 252, 0.88);
  text-align: center;
  font-size: clamp(0.95rem, 1.8vw, 1.08rem);
  line-height: 1.9;
  animation: fadeUp 0.9s 0.1s var(--transition-slow) both;
}

/* ============ Navigation ============ */
nav[aria-label="主导航"] {
  position: relative;
  z-index: 5;
  max-width: var(--max-width);
  margin: 0 auto;
  animation: fadeUp 1s 0.2s var(--transition-slow) both;
}

nav[aria-label="主导航"] ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 0.6rem;
  margin: 0;
  padding: 0.6rem;
  list-style: none;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-pill);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.22);
}

nav[aria-label="主导航"] li {
  margin: 0;
}

nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 0.5rem 1.05rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: #f1f5f9;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

nav[aria-label="主导航"] a:hover,
nav[aria-label="主导航"] a:focus-visible {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.24);
}

/* ============ Main Layout ============ */
main {
  display: block;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem) clamp(3rem, 6vw, 5rem);
}

main > section {
  position: relative;
  margin-bottom: var(--space-section);
  padding: clamp(1.4rem, 3.5vw, 2.4rem);
  background: var(--gradient-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  animation: fadeUp 0.7s var(--transition-slow) both;
  animation-timeline: view();
  animation-range: entry 0% cover 26%;
}

@supports not (animation-timeline: view()) {
  main > section {
    animation: fadeUp 0.7s var(--transition-slow) both;
  }
}

main > section:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

main > section:nth-of-type(1) { animation-delay: 0.02s; }
main > section:nth-of-type(2) { animation-delay: 0.06s; }
main > section:nth-of-type(3) { animation-delay: 0.1s; }
main > section:nth-of-type(4) { animation-delay: 0.14s; }
main > section:nth-of-type(5) { animation-delay: 0.18s; }
main > section:nth-of-type(6) { animation-delay: 0.22s; }

/* ============ Breadcrumb ============ */
nav[aria-label="面包屑导航"] {
  margin-bottom: 1.6rem;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0.55rem 0.9rem;
  list-style: none;
  font-size: 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-sm);
}

nav[aria-label="面包屑导航"] li {
  margin: 0;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--text-muted);
  opacity: 0.6;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-secondary);
  font-weight: 500;
}

nav[aria-label="面包屑导航"] a:hover {
  color: var(--brand-primary);
}

/* ============ Articles / Cards ============ */
article {
  position: relative;
  margin-bottom: 1.1rem;
  padding: 1.25rem 1.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
  overflow: hidden;
}

article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-brand);
  opacity: 0;
  transform: scaleY(0.4);
  transform-origin: top;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

article:hover,
article:focus-within {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

article:hover::before,
article:focus-within::before {
  opacity: 1;
  transform: scaleY(1);
}

article h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
  transition: color var(--transition-fast);
}

article:hover h3 {
  color: var(--brand-primary);
}

article > p:first-of-type {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-bottom: 0.6rem;
}

article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
}

article a::after {
  content: "→";
  display: inline-block;
  transition: transform var(--transition-fast);
}

article a:hover::after {
  transform: translateX(4px);
}

/* ============ FAQ / Details ============ */
details {
  margin-bottom: 0.85rem;
  padding: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

details:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

details[open] {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: var(--shadow-md);
}

summary {
  position: relative;
  padding: 1rem 3rem 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  position: absolute;
  right: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--brand-primary);
  background: var(--gradient-soft);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  color: #ffffff;
  background: var(--gradient-brand);
}

summary:hover {
  background: var(--gradient-soft);
  color: var(--brand-primary);
}

details > p {
  margin: 0;
  padding: 0.2rem 1.35rem 1.2rem;
  font-size: 0.94rem;
  line-height: 1.85;
  animation: fadeUp 0.4s var(--transition-base) both;
}

/* ============ HowTo Lists ============ */
section#howto ol {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

section#howto ol li {
  position: relative;
  counter-increment: step;
  padding: 0.7rem 0.9rem 0.7rem 3rem;
  margin-bottom: 0.6rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

section#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--gradient-brand);
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.32);
}

section#howto ol li:hover {
  transform: translateX(6px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

/* ============ Sitemap / Links Lists ============ */
section#sitemap ul,
section#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-left: 0;
  list-style: none;
}

section#sitemap li,
section#links li {
  margin: 0;
}

section#sitemap a,
section#links a {
  display: inline-block;
  padding: 0.45rem 1rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-fast), color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

section#sitemap a:hover,
section#links a:hover {
  transform: translateY(-3px);
  color: #ffffff;
  background: var(--gradient-brand);
  border-color: transparent;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

/* ============ Contact Section ============ */
section#contact p {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

section#contact p strong {
  color: var(--text-primary);
}

/* ============ Footer ============ */
footer[role="contentinfo"] {
  position: relative;
  margin-top: 2rem;
  padding: clamp(2rem, 5vw, 3.2rem) clamp(1rem, 4vw, 2rem);
  color: var(--text-secondary);
  background: var(--gradient-card);
  border-top: 1px solid var(--border-soft);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  text-align: center;
}

footer[role="contentinfo"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, 80%);
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  opacity: 0.85;
}

footer[role="contentinfo"] p {
  margin: 0 auto 0.6rem;
  max-width: 860px;
  font-size: 0.86rem;
  line-height: 1.85;
  color: var(--text-muted);
}

footer[role="contentinfo"] a {
  color: var(--text-secondary);
  font-weight: 500;
}

footer[role="contentinfo"] a:hover {
  color: var(--brand-primary);
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary));
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--brand-secondary), var(--brand-accent));
  background-clip: padding-box;
}

/* ============ Animations ============ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bannerShift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@keyframes floatSoft {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes pulseGlow {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.35);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(37, 99, 235, 0);
  }
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  :root {
    --max-width: 960px;
  }

  header[role="banner"] {
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  header[role="banner"] {
    padding: 2.2rem 1rem 2.8rem;
    margin-bottom: 2.2rem;
  }

  nav[aria-label="主导航"] ul {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  nav[aria-label="主导航"] ul::-webkit-scrollbar {
    display: none;
  }

  nav[aria-label="主导航"] a {
    padding: 0.45rem 0.85rem;
    font-size: 0.85rem;
  }

  main {
    padding: 0 0.9rem 2.5rem;
  }

  main > section {
    padding: 1.25rem 1.05rem;
    border-radius: var(--radius-md);
    margin-bottom: 2.2rem;
  }

  article {
    padding: 1rem 1.05rem;
  }

  summary {
    padding: 0.9rem 2.8rem 0.9rem 1rem;
    font-size: 0.92rem;
  }

  details > p {
    padding: 0.2rem 1.05rem 1rem;
    font-size: 0.9rem;
  }

  h2::after {
    width: 42px;
    height: 3px;
  }

  blockquote {
    padding: 0.85rem 1rem;
  }
}

@media (max-width: 480px) {
  header[role="banner"] {
    padding: 1.8rem 0.85rem 2.4rem;
  }

  nav[aria-label="主导航"] a {
    padding: 0.4rem 0.7rem;
    font-size: 0.8rem;
  }

  main > section {
    padding: 1.1rem 0.85rem;
  }

  article {
    padding: 0.9rem 0.9rem;
  }

  section#howto ol li {
    padding: 0.65rem 0.8rem 0.65rem 2.7rem;
    font-size: 0.9rem;
  }

  section#howto ol li::before {
    width: 26px;
    height: 26px;
    font-size: 0.78rem;
    left: 0.65rem;
  }

  section#sitemap a,
  section#links a {
    padding: 0.4rem 0.8rem;
    font-size: 0.82rem;
  }

  footer[role="contentinfo"] p {
    font-size: 0.8rem;
  }
}

@media (hover: none) {
  main > section:hover,
  article:hover,
  details:hover,
  section#howto ol li:hover {
    transform: none;
  }
}

@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;
  }
}

@media print {
  body {
    background: #ffffff;
    color: #000000;
  }

  header[role="banner"],
  footer[role="contentinfo"] {
    background: none;
    color: #000000;
  }

  main > section,
  article,
  details {
    box-shadow: none;
    border: 1px solid #cccccc;
  }
}