:root {
  --color-bg: #0d1117;
  --color-bg-alt: #161b22;
  --color-surface: rgba(22, 27, 34, 0.72);
  --color-surface-solid: #161b22;
  --color-surface-2: rgba(30, 37, 48, 0.65);
  --color-border: rgba(148, 163, 184, 0.18);
  --color-border-strong: rgba(148, 163, 184, 0.32);
  --color-text: #e6edf3;
  --color-text-muted: #9aa7b4;
  --color-text-dim: #6e7b8a;
  --color-primary: #e94560;
  --color-primary-soft: rgba(233, 69, 96, 0.14);
  --color-accent: #533483;
  --color-accent-2: #0f3460;
  --color-link: #7cc4ff;
  --color-link-hover: #a8d8ff;
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 45%, #0f3460 100%);
  --gradient-brand: linear-gradient(120deg, #e94560 0%, #533483 100%);
  --gradient-card: linear-gradient(160deg, rgba(22, 27, 34, 0.9) 0%, rgba(15, 52, 96, 0.55) 100%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 0 1px rgba(233, 69, 96, 0.35), 0 8px 30px rgba(233, 69, 96, 0.22);
  --blur: 14px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --max-width: 1180px;
  --header-height: 72px;
  --transition-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 260ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 480ms cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --color-bg: #f4f6fb;
    --color-bg-alt: #ffffff;
    --color-surface: rgba(255, 255, 255, 0.72);
    --color-surface-solid: #ffffff;
    --color-surface-2: rgba(255, 255, 255, 0.6);
    --color-border: rgba(15, 23, 42, 0.1);
    --color-border-strong: rgba(15, 23, 42, 0.18);
    --color-text: #16202b;
    --color-text-muted: #4b5a6a;
    --color-text-dim: #6b7a8a;
    --color-primary: #d92b4b;
    --color-primary-soft: rgba(217, 43, 75, 0.1);
    --color-link: #0b6bcb;
    --color-link-hover: #0952a0;
    --gradient-hero: linear-gradient(135deg, #e8ecf7 0%, #dbe6f5 45%, #cfe0f6 100%);
    --gradient-card: linear-gradient(160deg, rgba(255, 255, 255, 0.95) 0%, rgba(232, 240, 252, 0.85) 100%);
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.16);
    --shadow-glow: 0 0 0 1px rgba(217, 43, 75, 0.3), 0 8px 30px rgba(217, 43, 75, 0.16);
    color-scheme: light;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

body {
  margin: 0;
  min-height: 100vh;
  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 12% -10%, rgba(233, 69, 96, 0.12), transparent 60%),
    radial-gradient(1000px 520px at 88% 0%, rgba(15, 52, 96, 0.35), transparent 62%),
    radial-gradient(900px 700px at 50% 120%, rgba(83, 52, 131, 0.22), transparent 65%);
  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-link);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--color-link-hover);
  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: var(--radius-sm);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-3);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(1.75rem, 1.2rem + 2.4vw, 2.75rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.4rem, 1.1rem + 1.2vw, 2rem);
  position: relative;
  padding-left: var(--space-4);
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 5px;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
}

h3 {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  color: var(--color-text);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.35em;
  color: var(--color-text-muted);
}

li {
  margin-bottom: var(--space-2);
}

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

strong {
  color: var(--color-text);
  font-weight: 700;
}

figure {
  margin: var(--space-6) 0;
}

figcaption {
  margin-top: var(--space-3);
  font-size: 0.875rem;
  color: var(--color-text-dim);
  text-align: center;
}

header[role="banner"] {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-3) clamp(var(--space-4), 4vw, var(--space-7));
  background: rgba(13, 17, 23, 0.78);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
  backdrop-filter: blur(var(--blur)) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  animation: headerDrop 600ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@media (prefers-color-scheme: light) {
  header[role="banner"] {
    background: rgba(255, 255, 255, 0.78);
  }
}

@keyframes headerDrop {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

header .brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  min-width: 0;
}

header .brand svg {
  flex: 0 0 auto;
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--color-border-strong), 0 6px 18px rgba(233, 69, 96, 0.25);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

header .brand:hover svg {
  transform: rotate(90deg) scale(1.06);
  box-shadow: 0 0 0 1px var(--color-primary), 0 10px 26px rgba(233, 69, 96, 0.4);
}

header .brand strong {
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

header .brand p {
  margin: 0;
  font-size: 0.78rem;
  color: var(--color-text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

header nav {
  min-width: 0;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  justify-content: center;
}

header nav li {
  margin: 0;
}

header nav a {
  display: inline-block;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

header nav a:hover,
header nav a:focus-visible {
  color: var(--color-text);
  background: var(--color-primary-soft);
  border-color: var(--color-border-strong);
  text-decoration: none;
  transform: translateY(-1px);
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
}

header 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 form[role="search"] input[type="search"] {
  width: 200px;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: width var(--transition-base), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

header form[role="search"] input[type="search"]:focus {
  width: 260px;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
  outline: none;
}

header form[role="search"] button[type="submit"] {
  padding: 8px 18px;
  font-size: 0.875rem;
  font-family: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-brand);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(233, 69, 96, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

header form[role="search"] button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(233, 69, 96, 0.45);
  filter: brightness(1.08);
}

header form[role="search"] button[type="submit"]:active {
  transform: translateY(0);
}

main {
  display: block;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(var(--space-5), 4vw, var(--space-8)) clamp(var(--space-4), 4vw, var(--space-6));
}

main > section {
  position: relative;
  margin-bottom: var(--space-7);
  padding: clamp(var(--space-5), 3vw, var(--space-7));
  background: var(--color-surface);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(140%);
  backdrop-filter: blur(var(--blur)) saturate(140%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  animation: sectionRise 700ms cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-timeline: view();
  animation-range: entry 0% entry 60%;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

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

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

@supports not (animation-timeline: view()) {
  main > section {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

#hero {
  padding: clamp(var(--space-6), 5vw, var(--space-9)) clamp(var(--space-5), 4vw, var(--space-8));
  background: var(--gradient-hero);
  border: 1px solid var(--color-border-strong);
  overflow: hidden;
}

#hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 60%;
  height: 140%;
  background: radial-gradient(closest-side, rgba(233, 69, 96, 0.28), transparent 70%);
  pointer-events: none;
  filter: blur(10px);
}

#hero::after {
  content: "";
  position: absolute;
  inset: auto auto -50% -15%;
  width: 55%;
  height: 130%;
  background: radial-gradient(closest-side, rgba(124, 196, 255, 0.18), transparent 70%);
  pointer-events: none;
  filter: blur(10px);
}

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

#hero h1 {
  max-width: 22ch;
  background: linear-gradient(120deg, #ffffff 0%, #ffd6de 45%, #c9b6ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 30px rgba(233, 69, 96, 0.2);
}

@media (prefers-color-scheme: light) {
  #hero h1 {
    background: linear-gradient(120deg, #16202b 0%, #b3243f 50%, #4b2a86 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

#hero p {
  max-width: 68ch;
  font-size: clamp(0.95rem, 0.9rem + 0.25vw, 1.05rem);
  color: var(--color-text-muted);
}

#hero figure {
  margin-top: var(--space-6);
}

#hero figure svg {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

#hero figure:hover svg {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}

main > nav[aria-label="页面内锚点导航"] {
  margin-bottom: var(--space-7);
  padding: var(--space-5) clamp(var(--space-4), 3vw, var(--space-6));
  background: var(--color-surface-2);
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

main > nav[aria-label="页面内锚点导航"] h2 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-dim);
  padding-left: 0;
  margin-bottom: var(--space-4);
}

main > nav[aria-label="页面内锚点导航"] h2::before {
  display: none;
}

main > nav[aria-label="页面内锚点导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

main > nav[aria-label="页面内锚点导航"] li {
  margin: 0;
}

main > nav[aria-label="页面内锚点导航"] a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  background: var(--color-surface-solid);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

main > nav[aria-label="页面内锚点导航"] a:hover {
  color: #fff;
  background: var(--gradient-brand);
  border-color: transparent;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(233, 69, 96, 0.3);
}

#articles {
  display: grid;
  gap: var(--space-5);
}

#articles h2 {
  grid-column: 1 / -1;
}

#articles article {
  padding: var(--space-5);
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

#articles article::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(233, 69, 96, 0.08) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 700ms ease;
  pointer-events: none;
}

#articles article:hover {
  transform: translateY(-6px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}

#articles article:hover::after {
  transform: translateX(120%);
}

#articles article h3 {
  margin-bottom: var(--space-2);
}

#articles article h3 + p {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-2);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  border: 1px solid var(--color-border-strong);
  transition: all var(--transition-fast);
}

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

#articles article a:hover {
  background: var(--gradient-brand);
  color: #fff;
  border-color: transparent;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(233, 69, 96, 0.3);
}

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

#faq {
  display: grid;
  gap: var(--space-3);
}

#faq h2 {
  margin-bottom: var(--space-2);
}

#faq details {
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}

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

#faq details[open] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  background: var(--color-surface-solid);
}

#faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  transition: color var(--transition-fast);
}

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

#faq summary::after {
  content: "+";
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  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-base);
}

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

#faq details p {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
  animation: fadeIn 320ms ease both;
}

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

#howto ol {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-7);
  margin-bottom: var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  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: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-brand);
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
}

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

#contact h3,
#team h3 {
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--color-primary-soft);
}

#sitemap ul,
#links ul {
  columns: 2;
  column-gap: var(--space-6);
  list-style: none;
  padding-left: 0;
}

#sitemap li,
#links li {
  break-inside: avoid;
  padding: 6px 0;
  border-bottom: 1px dashed var(--color-border);
}

#sitemap a,
#links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

#sitemap a::before,
#links a::before {
  content: "▸";
  color: var(--color-primary);
  font-size: 0.8em;
}

#sitemap a:hover,
#links a:hover {
  transform: translateX(4px);
  text-decoration: none;
}

#updates ul {
  list-style: none;
  padding-left: 0;
  position: relative;
}

#updates ul::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), transparent);
  border-radius: var(--radius-pill);
}

#updates li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  font-size: 0.92rem;
}

#updates li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

#updates li:first-child::before {
  background: var(--color-primary);
}

footer[role="contentinfo"] {
  margin-top: var(--space-8);
  padding: var(--space-7) clamp(var(--space-4), 4vw, var(--space-6)) var(--space-6);
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.35) 100%);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

@media (prefers-color-scheme: light) {
  footer[role="contentinfo"] {
    background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.04) 100%);
  }
}

footer[role="contentinfo"] p {
  margin: 0 0 var(--space-2);
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

footer[role="contentinfo"] p:nth-child(2) {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 600;
}

footer[role="contentinfo"] a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

footer[role="contentinfo"] a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

@media (min-width: 720px) {
  #articles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  #articles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #hero {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    grid-template-areas:
      "title figure"
      "lead figure"
      "lead figure";
    gap: var(--space-5) var(--space-7);
    align-items: center;
  }

  #hero h1 {
    grid-area: title;
    margin-bottom: 0;
  }

  #hero p:first-of-type {
    grid-area: lead;
  }

  #hero figure {
    grid-area: figure;
    margin: 0;
  }
}

@media (max-width: 1023px) {
  header[role="banner"] {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand search"
      "nav nav";
    gap: var(--space-3) var(--space-4);
    padding-bottom: var(--space-3);
  }

  header .brand {
    grid-area: brand;
  }

  header nav {
    grid-area: nav;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
  }

  header nav::-webkit-scrollbar {
    display: none;
  }

  header nav ul {
    flex-wrap: nowrap;
    justify-content: flex-start;
    width: max-content;
  }

  header form[role="search"] {
    grid-area: search;
  }

  header form[role="search"] input[type="search"] {
    width: 150px;
  }

  header form[role="search"] input[type="search"]:focus {
    width: 190px;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 60px;
  }

  body {
    font-size: 15px;
  }

  header[role="banner"] {
    grid-template-columns: 1fr;
    grid-template-areas:
      "brand"
      "search"
      "nav";
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
  }

  header .brand p {
    display: none;
  }

  header form[role="search"] {
    width: 100%;
  }

  header form[role="search"] input[type="search"],
  header form[role="search"] input[type="search"]:focus {
    flex: 1;
    width: auto;
  }

  main {
    padding: var(--space-4) var(--space-3) var(--space-6);
  }

  main > section {
    padding: var(--space-5) var(--space-4);
    margin-bottom: var(--space-5);
    border-radius: var(--radius-md);
  }

  #hero {
    padding: var(--space-6) var(--space-4);
  }

  #hero h1 {
    max-width: none;
  }

  h2 {
    padding-left: var(--space-3);
  }

  h2::before {
    width: 4px;
  }

  #sitemap ul,
  #links ul {
    columns: 1;
  }

  #articles {
    grid-template-columns: 1fr;
  }

  #faq details {
    padding: var(--space-3) var(--space-4);
  }
}

@media (max-width: 420px) {
  header nav a {
    padding: 5px 10px;
    font-size: 0.8rem;
  }

  main > nav[aria-label="页面内锚点导航"] a {
    font-size: 0.8rem;
    padding: 5px 11px;
  }

  #howto ol li {
    padding-left: var(--space-6);
  }
}

@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 {
  header[role="banner"],
  main > nav[aria-label="页面内锚点导航"],
  footer[role="contentinfo"] {
    display: none;
  }

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

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

::selection {
  background: var(--color-primary);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-pill);
  border: 2px solid var(--color-bg-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #ff5c7a, #6b46a8);
}