:root {
  --color-primary: #ff5a3c;
  --color-primary-dark: #e0432a;
  --color-primary-light: #ffb3a3;
  --color-primary-soft: #fff3ef;
  --color-accent: #ff9f1c;
  --color-accent-2: #ffd166;
  --color-bg: #fdf8f6;
  --color-bg-alt: #ffffff;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.72);
  --color-text: #2b1a16;
  --color-text-soft: #6b534c;
  --color-text-muted: #9a857e;
  --color-border: rgba(255, 90, 60, 0.14);
  --color-border-strong: rgba(255, 90, 60, 0.28);
  --shadow-sm: 0 2px 8px rgba(120, 50, 30, 0.06);
  --shadow-md: 0 8px 24px rgba(120, 50, 30, 0.1);
  --shadow-lg: 0 18px 48px rgba(120, 50, 30, 0.14);
  --shadow-glow: 0 12px 36px rgba(255, 90, 60, 0.28);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --header-height: 72px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --gradient-banner: linear-gradient(135deg, #ff5a3c 0%, #ff7a45 38%, #ff9f1c 72%, #ffd166 100%);
  --gradient-banner-soft: linear-gradient(135deg, rgba(255, 90, 60, 0.14) 0%, rgba(255, 159, 28, 0.12) 100%);
  --gradient-text: linear-gradient(120deg, #ff5a3c 0%, #ff9f1c 100%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14100f;
    --color-bg-alt: #1c1614;
    --color-surface: #221a17;
    --color-surface-glass: rgba(34, 26, 23, 0.72);
    --color-text: #f4ece8;
    --color-text-soft: #c9b8b1;
    --color-text-muted: #93807a;
    --color-border: rgba(255, 122, 69, 0.16);
    --color-border-strong: rgba(255, 122, 69, 0.34);
    --color-primary-soft: rgba(255, 90, 60, 0.12);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 12px 36px rgba(255, 90, 60, 0.36);
    --gradient-banner-soft: linear-gradient(135deg, rgba(255, 90, 60, 0.2) 0%, rgba(255, 159, 28, 0.14) 100%);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(1200px 600px at 90% -10%, rgba(255, 159, 28, 0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(255, 90, 60, 0.1), transparent 55%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

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

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

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  position: relative;
  padding-bottom: 0.5em;
}

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

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  color: var(--color-text);
}

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

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

li {
  margin-bottom: 0.4em;
}

li::marker {
  color: var(--color-primary);
}

strong, b {
  color: var(--color-text);
  font-weight: 600;
}

/* ============ Header ============ */
header[role="banner"] {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface-glass);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

header[role="banner"] > div {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

header[role="banner"] > div > a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--transition-fast);
}

header[role="banner"] > div > a:hover {
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--color-primary);
}

header[role="banner"] > div > a svg {
  border-radius: 12px;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

header[role="banner"] > div > a:hover svg {
  transform: rotate(-6deg) scale(1.06);
  box-shadow: 0 14px 30px rgba(255, 90, 60, 0.4);
}

header[role="banner"] nav[aria-label="主导航"] {
  flex: 1 1 auto;
}

header[role="banner"] nav[aria-label="主导航"] ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

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

header[role="banner"] nav[aria-label="主导航"] li::marker {
  content: none;
}

header[role="banner"] nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-soft);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

header[role="banner"] nav[aria-label="主导航"] a:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  transform: translateY(-2px);
  text-decoration: none;
}

header[role="banner"] form[role="search"] {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

header[role="banner"] form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

header[role="banner"] form[role="search"] input[type="search"] {
  width: 220px;
  padding: 10px 16px;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  transition: width var(--transition-base), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

header[role="banner"] form[role="search"] input[type="search"]::placeholder {
  color: var(--color-text-muted);
}

header[role="banner"] form[role="search"] input[type="search"]:focus {
  width: 280px;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(255, 90, 60, 0.14);
  outline: none;
}

header[role="banner"] form[role="search"] button {
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--gradient-banner);
  background-size: 200% 200%;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 6px 18px rgba(255, 90, 60, 0.3);
  transition: background-position var(--transition-slow), transform var(--transition-fast), box-shadow var(--transition-fast);
}

header[role="banner"] form[role="search"] button:hover {
  background-position: 100% 50%;
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(255, 90, 60, 0.42);
}

header[role="banner"] form[role="search"] button:active {
  transform: translateY(0) scale(0.98);
}

/* ============ Main ============ */
main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

main > nav[aria-label="面包屑导航"] {
  padding: 20px 0 8px;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

main > nav[aria-label="面包屑导航"] li {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

main > nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1;
}

main > nav[aria-label="面包屑导航"] a {
  color: var(--color-text-soft);
  text-decoration: none;
}

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

main > nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}

/* ============ Sections ============ */
main > section {
  margin: 32px 0;
  padding: 40px 36px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  animation: fadeUp var(--transition-slow) both;
  animation-timeline: view();
  animation-range: entry 0% cover 22%;
}

@supports not (animation-timeline: view()) {
  main > section {
    animation: none;
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main > section > h2 {
  margin-top: 0;
}

main > section > h3:first-of-type {
  margin-top: 1.2em;
}

main > section > h3 {
  margin-top: 1.6em;
  padding-left: 14px;
  position: relative;
}

main > section > h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  bottom: 0.28em;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-text);
}

/* ============ Hero ============ */
#hero {
  position: relative;
  overflow: hidden;
  padding: 56px 40px;
  background: var(--gradient-banner);
  background-size: 200% 200%;
  border: none;
  border-radius: var(--radius-xl);
  color: #fff;
  box-shadow: var(--shadow-glow);
  animation: heroShift 14s ease infinite, fadeUp var(--transition-slow) both;
}

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

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 85% 10%, rgba(255, 255, 255, 0.28), transparent 60%),
    radial-gradient(500px 260px at 10% 90%, rgba(255, 255, 255, 0.16), transparent 60%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  filter: blur(8px);
  pointer-events: none;
  animation: floatOrb 9s ease-in-out infinite;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-24px, 24px) scale(1.08); }
}

#hero > * {
  position: relative;
  z-index: 1;
}

#hero h1 {
  color: #fff;
  text-shadow: 0 2px 18px rgba(120, 30, 10, 0.28);
  max-width: 900px;
}

#hero p {
  color: rgba(255, 255, 255, 0.94);
  font-size: 1.02rem;
  max-width: 860px;
}

#hero > div {
  margin: 28px 0;
  display: flex;
  justify-content: center;
  padding: 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#hero > div:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 20px 50px rgba(120, 30, 10, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

#hero > div svg {
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 600px;
}

#hero > p:last-child {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
}

#hero > p:last-child a {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

#hero > p:last-child a:hover {
  background: #fff;
  color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(120, 30, 10, 0.25);
  text-decoration: none;
}

/* ============ Details / FAQ ============ */
details {
  margin: 0 0 12px;
  padding: 0;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

details:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

details[open] {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
  background: var(--color-surface);
}

details summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--transition-fast);
}

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

details summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-fast);
}

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

details summary:hover {
  color: var(--color-primary);
}

details > p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--color-text-soft);
  animation: detailsIn var(--transition-base) both;
}

@keyframes detailsIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ Articles ============ */
#articles article {
  padding: 24px 26px;
  margin-bottom: 18px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-text);
  opacity: 0;
  transition: opacity var(--transition-base);
}

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

#articles article:hover::before {
  opacity: 1;
}

#articles article h3 {
  margin-top: 0;
  padding-left: 0;
  font-size: 1.12rem;
  transition: color var(--transition-fast);
}

#articles article h3::before {
  display: none;
}

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

#articles article > p:first-of-type {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.7em;
}

#articles article > p {
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

#articles article > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

#articles article > a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

#articles article > a:hover {
  background: var(--gradient-banner);
  color: #fff;
  transform: translateX(2px);
  text-decoration: none;
}

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

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

#howto ol li {
  position: relative;
  padding: 14px 18px 14px 58px;
  margin-bottom: 12px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  counter-increment: step;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-banner);
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(255, 90, 60, 0.32);
}

#howto ol li:hover {
  transform: translateX(4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

/* ============ Contact ============ */
#contact p {
  margin-bottom: 0.5em;
}

#contact p strong,
#contact p b {
  color: var(--color-primary);
}

/* ============ Sitemap & Links ============ */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-soft);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: all var(--transition-fast);
}

#sitemap a:hover,
#links a:hover {
  color: #fff;
  background: var(--gradient-banner);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(255, 90, 60, 0.3);
  text-decoration: none;
}

/* ============ Footer ============ */
footer[role="contentinfo"] {
  position: relative;
  margin-top: 48px;
  padding: 56px 24px 32px;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-soft);
}

footer[role="contentinfo"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-banner);
}

footer[role="contentinfo"] > section {
  max-width: 1240px;
  margin: 0 auto 28px;
  padding: 0 0 0 0;
}

footer[role="contentinfo"] > section h2 {
  font-size: 1.02rem;
  margin-bottom: 0.5em;
  color: var(--color-text);
  padding-bottom: 0;
}

footer[role="contentinfo"] > section h2::after {
  display: none;
}

footer[role="contentinfo"] > section p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin: 0;
  max-width: 760px;
}

footer[role="contentinfo"] > p:last-child {
  max-width: 1240px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

footer[role="contentinfo"] > p:last-child a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-banner);
  border-radius: var(--radius-pill);
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(255, 90, 60, 0.28);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

footer[role="contentinfo"] > p:last-child a::before {
  content: "↑";
}

footer[role="contentinfo"] > p:last-child a:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(255, 90, 60, 0.42);
  text-decoration: none;
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  header[role="banner"] > div {
    gap: 16px;
  }

  header[role="banner"] form[role="search"] input[type="search"] {
    width: 170px;
  }

  header[role="banner"] form[role="search"] input[type="search"]:focus {
    width: 210px;
  }

  main > section {
    padding: 32px 26px;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: auto;
  }

  header[role="banner"] > div {
    padding: 12px 18px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  header[role="banner"] > div > a {
    justify-content: center;
  }

  header[role="banner"] nav[aria-label="主导航"] ul {
    justify-content: center;
    gap: 2px;
  }

  header[role="banner"] nav[aria-label="主导航"] a {
    padding: 6px 12px;
    font-size: 0.86rem;
  }

  header[role="banner"] form[role="search"] {
    justify-content: center;
  }

  header[role="banner"] form[role="search"] input[type="search"],
  header[role="banner"] form[role="search"] input[type="search"]:focus {
    width: 100%;
    max-width: 320px;
  }

  main {
    padding: 0 16px 48px;
  }

  main > section {
    padding: 28px 20px;
    border-radius: var(--radius-md);
    margin: 24px 0;
  }

  #hero {
    padding: 40px 22px;
    border-radius: var(--radius-lg);
  }

  #hero > div {
    padding: 14px;
  }

  #hero > p:last-child {
    gap: 10px;
  }

  #hero > p:last-child a {
    flex: 1 1 auto;
    justify-content: center;
    padding: 10px 16px;
  }

  footer[role="contentinfo"] {
    padding: 40px 18px 24px;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }

  main > section {
    padding: 24px 16px;
  }

  #hero {
    padding: 32px 18px;
  }

  #hero h1 {
    font-size: 1.5rem;
  }

  #hero p {
    font-size: 0.94rem;
  }

  #hero > p:last-child {
    flex-direction: column;
  }

  #hero > p:last-child a {
    width: 100%;
  }

  #articles article {
    padding: 18px 16px;
  }

  #howto ol li {
    padding: 12px 14px 12px 50px;
  }

  #sitemap a,
  #links a {
    padding: 7px 14px;
    font-size: 0.84rem;
  }

  details summary {
    padding: 14px 46px 14px 16px;
    font-size: 0.95rem;
  }

  details > p {
    padding: 0 16px 16px;
    font-size: 0.92rem;
  }
}

/* ============ Motion preferences ============ */
@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;
    scroll-behavior: auto !important;
  }

  main > section {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* ============ Print ============ */
@media print {
  header[role="banner"],
  footer[role="contentinfo"],
  #hero > div,
  #hero > p:last-child {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  main > section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
    animation: none;
  }
}