:root {
  --brand-primary: #2b3a67;
  --brand-primary-light: #3d5090;
  --brand-accent: #f5c542;
  --brand-accent-soft: #ffe08a;
  --brand-secondary: #e05a47;
  --brand-teal: #3fa796;
  --bg-base: #f6f7fb;
  --bg-elevated: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.62);
  --bg-glass-strong: rgba(255, 255, 255, 0.82);
  --border-glass: rgba(255, 255, 255, 0.55);
  --border-subtle: rgba(43, 58, 103, 0.12);
  --text-primary: #1d2440;
  --text-secondary: #4a5273;
  --text-muted: #7b829c;
  --text-inverse: #ffffff;
  --shadow-sm: 0 2px 8px rgba(29, 36, 64, 0.06);
  --shadow-md: 0 8px 24px rgba(29, 36, 64, 0.10);
  --shadow-lg: 0 18px 48px rgba(29, 36, 64, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --gradient-banner: linear-gradient(135deg, #2b3a67 0%, #3d5090 45%, #3fa796 100%);
  --gradient-accent: linear-gradient(135deg, #f5c542 0%, #e05a47 100%);
  --gradient-soft: linear-gradient(135deg, rgba(43, 58, 103, 0.08) 0%, rgba(63, 167, 150, 0.10) 100%);
  --blur-glass: blur(16px) saturate(160%);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --content-max: 1180px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand-primary: #8ea2e0;
    --brand-primary-light: #a8b8ee;
    --brand-accent: #f5c542;
    --brand-accent-soft: #ffe08a;
    --brand-secondary: #ff7f6c;
    --brand-teal: #4fc3b0;
    --bg-base: #0f1424;
    --bg-elevated: #171d31;
    --bg-glass: rgba(23, 29, 49, 0.58);
    --bg-glass-strong: rgba(23, 29, 49, 0.82);
    --border-glass: rgba(255, 255, 255, 0.10);
    --border-subtle: rgba(255, 255, 255, 0.10);
    --text-primary: #eef1fa;
    --text-secondary: #b9c0d8;
    --text-muted: #8b93af;
    --text-inverse: #0f1424;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
    --gradient-banner: linear-gradient(135deg, #1a2140 0%, #26305a 45%, #1f5f57 100%);
    --gradient-soft: linear-gradient(135deg, rgba(142, 162, 224, 0.10) 0%, rgba(79, 195, 176, 0.12) 100%);
    color-scheme: dark;
  }
}

html[data-theme="dark"] {
  --brand-primary: #8ea2e0;
  --brand-primary-light: #a8b8ee;
  --brand-secondary: #ff7f6c;
  --brand-teal: #4fc3b0;
  --bg-base: #0f1424;
  --bg-elevated: #171d31;
  --bg-glass: rgba(23, 29, 49, 0.58);
  --bg-glass-strong: rgba(23, 29, 49, 0.82);
  --border-glass: rgba(255, 255, 255, 0.10);
  --border-subtle: rgba(255, 255, 255, 0.10);
  --text-primary: #eef1fa;
  --text-secondary: #b9c0d8;
  --text-muted: #8b93af;
  --text-inverse: #0f1424;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
  --gradient-banner: linear-gradient(135deg, #1a2140 0%, #26305a 45%, #1f5f57 100%);
  --gradient-soft: linear-gradient(135deg, rgba(142, 162, 224, 0.10) 0%, rgba(79, 195, 176, 0.12) 100%);
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-base);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(245, 197, 66, 0.10), transparent 42%),
    radial-gradient(circle at 88% 0%, rgba(63, 167, 150, 0.12), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(43, 58, 103, 0.08), 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(--brand-primary);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--brand-secondary);
}

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

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

h1 {
  font-size: clamp(1.85rem, 4.2vw, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  position: relative;
  padding-bottom: 0.4em;
}

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

h3 {
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  color: var(--text-primary);
}

h4 {
  font-size: 1.02rem;
  color: var(--text-secondary);
}

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: 0.4em;
}

li::marker {
  color: var(--brand-teal);
}

blockquote {
  margin: 1.2em 0;
  padding: 1em 1.4em;
  border-left: 4px solid var(--brand-accent);
  border-radius: var(--radius-sm);
  background: var(--gradient-soft);
  color: var(--text-secondary);
  font-style: normal;
}

blockquote p {
  margin: 0.4em 0;
}

address {
  font-style: normal;
}

hr {
  border: none;
  height: 1px;
  background: var(--border-subtle);
  margin: 2em 0;
}

::selection {
  background: var(--brand-accent);
  color: #1d2440;
}

body > a[href="#main-content"] {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 999;
  padding: 0.7em 1.2em;
  background: var(--brand-primary);
  color: var(--text-inverse);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
  transition: top var(--transition-fast);
}

body > a[href="#main-content"]:focus {
  top: 16px;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass);
  backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
}

header > div {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

header > div > a:first-child {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

header > div > a:first-child svg {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

header > div > a:first-child:hover svg {
  transform: rotate(-6deg) scale(1.06);
  box-shadow: var(--shadow-md);
}

header > div > a:first-child:hover {
  color: var(--brand-primary);
}

header nav {
  flex: 1 1 auto;
  min-width: 0;
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.15rem;
}

header nav li {
  margin: 0;
}

header nav a {
  display: inline-block;
  padding: 0.4em 0.7em;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

header nav a:hover {
  color: var(--brand-primary);
  background: var(--gradient-soft);
  transform: translateY(-1px);
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  flex: 0 1 auto;
}

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

header form[role="search"] input[type="search"] {
  width: 180px;
  padding: 0.5em 0.9em;
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    width var(--transition-base), background-color var(--transition-fast);
}

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

header form[role="search"] input[type="search"]:focus {
  width: 220px;
  outline: none;
  border-color: var(--brand-teal);
  box-shadow: 0 0 0 3px rgba(63, 167, 150, 0.22);
  background: var(--bg-elevated);
}

header form[role="search"] button {
  padding: 0.5em 1em;
  font-size: 0.88rem;
  font-family: inherit;
  font-weight: 600;
  color: var(--text-inverse);
  background: var(--gradient-banner);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

header form[role="search"] button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.08);
}

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

header > div > button[aria-label="切换暗黑模式"] {
  padding: 0.5em 1em;
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 600;
  color: var(--brand-primary);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

header > div > button[aria-label="切换暗黑模式"]:hover {
  color: var(--text-inverse);
  background: var(--gradient-accent);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

nav[aria-label="面包屑导航"] {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.9rem 1.25rem 0;
}

nav[aria-label="面包屑导航"] ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 0.35rem;
  color: var(--text-muted);
  opacity: 0.7;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-secondary);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

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

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

main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

main > section {
  position: relative;
  margin: 0 0 1.75rem;
  padding: clamp(1.25rem, 3vw, 2.25rem);
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  backdrop-filter: var(--blur-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base), background-color var(--transition-base);
}

main > section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-subtle);
}

main > section[aria-labelledby="hero-title"] {
  margin-top: 1rem;
  padding: clamp(1.75rem, 4vw, 3rem);
  background: var(--gradient-banner);
  border: none;
  color: var(--text-inverse);
  overflow: hidden;
}

main > section[aria-labelledby="hero-title"]::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto auto;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(245, 197, 66, 0.35), transparent 68%);
  pointer-events: none;
}

main > section[aria-labelledby="hero-title"]::after {
  content: "";
  position: absolute;
  inset: auto auto -30% -8%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(63, 167, 150, 0.35), transparent 70%);
  pointer-events: none;
}

main > section[aria-labelledby="hero-title"] > * {
  position: relative;
  z-index: 1;
}

main > section[aria-labelledby="hero-title"] h1 {
  color: #ffffff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.28);
  margin-bottom: 0.8rem;
}

main > section[aria-labelledby="hero-title"] h1::after {
  content: "";
  display: block;
  width: 84px;
  height: 5px;
  margin-top: 0.7rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
}

main > section[aria-labelledby="hero-title"] p {
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  max-width: 78ch;
}

main > section[aria-labelledby="hero-title"] p:last-of-type {
  margin-top: 1.2rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.01em;
}

main > section[aria-labelledby="hero-title"] div {
  margin: 1.6rem 0 1.2rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base);
}

main > section[aria-labelledby="hero-title"] div:hover {
  transform: scale(1.01);
}

main > section[aria-labelledby="hero-title"] svg {
  width: 100%;
  height: auto;
  display: block;
}

nav[aria-label="页内锚点导航"] {
  margin: 0 0 1.75rem;
  padding: clamp(1rem, 2.4vw, 1.6rem) clamp(1.25rem, 3vw, 2rem);
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  backdrop-filter: var(--blur-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

nav[aria-label="页内锚点导航"] h2 {
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
  padding-bottom: 0.3em;
}

nav[aria-label="页内锚点导航"] h2::after {
  width: 40px;
  height: 3px;
}

nav[aria-label="页内锚点导航"] ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

nav[aria-label="页内锚点导航"] li {
  margin: 0;
}

nav[aria-label="页内锚点导航"] a {
  display: inline-block;
  padding: 0.42em 0.95em;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

nav[aria-label="页内锚点导航"] a:hover {
  color: var(--text-inverse);
  background: var(--gradient-banner);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

main > section h3 + p,
main > section h4 + p {
  margin-top: 0.2em;
}

main > section p + h3 {
  margin-top: 1.4rem;
}

#products > h3,
#solutions > h3,
#scenes > h3,
#cases > h3,
#news > h3,
#howto > h3,
#notes > h3,
#extend > h3,
#about > h3,
#industry > h3,
#concept > h3 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

#products > h3::before,
#solutions > h3::before,
#scenes > h3::before,
#cases > h3::before,
#news > h3::before,
#howto > h3::before,
#notes > h3::before,
#extend > h3::before,
#about > h3::before,
#industry > h3::before,
#concept > h3::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 0 4px rgba(245, 197, 66, 0.18);
}

#articles article {
  position: relative;
  margin: 0 0 1rem;
  padding: 1.1rem 1.3rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base);
}

#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.1rem;
  bottom: 1.1rem;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

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

#articles article h3 {
  font-size: 1.08rem;
  margin-bottom: 0.4rem;
  transition: color var(--transition-fast);
}

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

#articles article p {
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
  color: var(--text-secondary);
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35em 0.9em;
  border-radius: var(--radius-pill);
  background: var(--gradient-soft);
  color: var(--brand-primary);
  transition: all var(--transition-fast);
}

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

#articles article a:hover {
  background: var(--gradient-banner);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
}

#articles article a:hover::after {
  transform: translateX(3px);
}

#faq details {
  margin: 0 0 0.75rem;
  padding: 0.2rem 1.1rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

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

#faq details[open] {
  border-color: var(--brand-accent);
  box-shadow: var(--shadow-md);
  background: var(--bg-elevated);
}

#faq summary {
  position: relative;
  padding: 0.85rem 1.8rem 0.85rem 0;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--brand-primary);
  background: var(--gradient-soft);
  border-radius: 50%;
  transition: transform var(--transition-base), background-color var(--transition-fast),
    color var(--transition-fast);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--gradient-accent);
  color: #1d2440;
}

#faq summary:hover {
  color: var(--brand-primary);
}

#faq details p {
  margin: 0 0 1rem;
  padding-top: 0.2rem;
  font-size: 0.92rem;
  border-top: 1px dashed var(--border-subtle);
  padding-top: 0.9rem;
  animation: fadeSlideIn 0.35s ease both;
}

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

#howto ol li {
  position: relative;
  counter-increment: step;
  padding: 0.7rem 0.9rem 0.7rem 3rem;
  margin-bottom: 0.6rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-inverse);
  background: var(--gradient-banner);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

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

#cases blockquote {
  display: grid;
  gap: 0.5rem;
  background: var(--gradient-soft);
  border-left-color: var(--brand-teal);
}

#cases blockquote p {
  position: relative;
  padding-left: 1.2rem;
  font-size: 0.92rem;
}

#cases blockquote p::before {
  content: "“";
  position: absolute;
  left: 0;
  top: -0.1em;
  font-size: 1.4rem;
  color: var(--brand-accent);
  font-weight: 700;
  line-height: 1;
}

#news h3 + p {
  padding-left: 1rem;
  border-left: 3px solid var(--border-subtle);
  font-size: 0.92rem;
}

#news h3 {
  margin-top: 1.2rem;
}

#contact address {
  padding: 1rem 1.3rem;
  background: var(--gradient-soft);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

#contact address p {
  margin: 0.35em 0;
  font-size: 0.92rem;
}

#contact address p:first-child {
  font-weight: 700;
  color: var(--text-primary);
}

main > section[aria-labelledby="sitemap-title"] ul,
main > section[aria-labelledby="links-title"] ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

main > section[aria-labelledby="sitemap-title"] li,
main > section[aria-labelledby="links-title"] li {
  margin: 0;
}

main > section[aria-labelledby="sitemap-title"] a,
main > section[aria-labelledby="links-title"] a {
  display: inline-block;
  padding: 0.4em 0.95em;
  font-size: 0.86rem;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

main > section[aria-labelledby="sitemap-title"] a:hover,
main > section[aria-labelledby="links-title"] a:hover {
  color: var(--text-inverse);
  background: var(--gradient-banner);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

footer {
  position: relative;
  margin-top: 2rem;
  padding: clamp(2rem, 4vw, 3rem) 1.25rem 2rem;
  background: var(--gradient-banner);
  color: rgba(255, 255, 255, 0.85);
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  inset: -50% -10% auto auto;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(245, 197, 66, 0.22), transparent 70%);
  pointer-events: none;
}

footer > section {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto 1.5rem;
  padding: 0 0 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

footer > section:last-of-type {
  border-bottom: none;
  margin-bottom: 1rem;
}

footer h2 {
  font-size: 1.05rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
  padding-bottom: 0.3em;
}

footer h2::after {
  width: 36px;
  height: 3px;
  background: var(--gradient-accent);
}

footer h2:not(:first-child) {
  margin-top: 1rem;
}

footer p {
  max-width: 82ch;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 0.6em;
}

footer > p {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto 1rem;
  padding-top: 1rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.66);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

footer nav[aria-label="页脚导航"] {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto;
}

footer nav[aria-label="页脚导航"] ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

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

footer nav[aria-label="页脚导航"] a {
  display: inline-block;
  padding: 0.35em 0.85em;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.82);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition: all var(--transition-fast);
}

footer nav[aria-label="页脚导航"] a:hover {
  color: #1d2440;
  background: var(--brand-accent);
  border-color: transparent;
  transform: translateY(-2px);
}

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

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

@keyframes floatGlow {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.9;
  }
  50% {
    transform: translate(-12px, 10px) scale(1.06);
    opacity: 1;
  }
}

@supports (animation-timeline: view()) {
  main > section {
    animation: revealUp linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 55%;
  }
}

@media (prefers-reduced-motion: no-preference) {
  main > section[aria-labelledby="hero-title"]::before {
    animation: floatGlow 9s ease-in-out infinite;
  }
  main > section[aria-labelledby="hero-title"]::after {
    animation: floatGlow 11s ease-in-out infinite reverse;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 1024px) {
  header > div {
    padding: 0.65rem 1rem;
  }

  header nav {
    order: 3;
    flex-basis: 100%;
  }

  header nav ul {
    gap: 0.15rem;
  }

  header form[role="search"] {
    margin-left: auto;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15.5px;
  }

  header {
    position: sticky;
  }

  header > div {
    gap: 0.6rem;
    padding: 0.6rem 0.9rem;
  }

  header > div > a:first-child {
    font-size: 0.98rem;
  }

  header nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.15rem;
  }

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

  header nav ul {
    flex-wrap: nowrap;
    width: max-content;
    padding-bottom: 0.15rem;
  }

  header nav a {
    font-size: 0.85rem;
    padding: 0.42em 0.72em;
  }

  header form[role="search"] {
    flex: 1 1 100%;
    order: 4;
  }

  header form[role="search"] input[type="search"],
  header form[role="search"] input[type="search"]:focus {
    width: 100%;
    flex: 1 1 auto;
  }

  header > div > button[aria-label="切换暗黑模式"] {
    order: 2;
    margin-left: auto;
    font-size: 0.8rem;
    padding: 0.45em 0.85em;
  }

  nav[aria-label="面包屑导航"] {
    padding: 0.7rem 0.9rem 0;
  }

  main {
    padding: 1rem 0.9rem 2.5rem;
  }

  main > section {
    border-radius: var(--radius-md);
    padding: 1.15rem;
    margin-bottom: 1.2rem;
  }

  main > section[aria-labelledby="hero-title"] {
    padding: 1.4rem 1.15rem;
    border-radius: var(--radius-md);
  }

  main > section[aria-labelledby="hero-title"] h1::after {
    width: 64px;
    height: 4px;
  }

  nav[aria-label="页内锚点导航"] {
    padding: 1rem;
    border-radius: var(--radius-md);
  }

  nav[aria-label="页内锚点导航"] ul {
    gap: 0.4rem;
  }

  nav[aria-label="页内锚点导航"] a {
    font-size: 0.8rem;
    padding: 0.36em 0.8em;
  }

  #articles article {
    padding: 1rem;
  }

  #articles article:hover {
    transform: translateX(2px);
  }

  #faq details {
    padding: 0.15rem 0.9rem;
  }

  #faq summary {
    font-size: 0.94rem;
    padding: 0.75rem 1.7rem 0.75rem 0;
  }

  #howto ol li {
    padding: 0.65rem 0.8rem 0.65rem 2.7rem;
    font-size: 0.92rem;
  }

  footer {
    padding: 1.75rem 0.9rem 1.6rem;
  }

  footer > section {
    margin-bottom: 1.1rem;
    padding-bottom: 0.9rem;
  }

  footer nav[aria-label="页脚导航"] ul {
    gap: 0.4rem;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.55rem;
  }

  h2 {
    font-size: 1.28rem;
  }

  h3 {
    font-size: 1.06rem;
  }

  header > div > a:first-child span {
    font-size: 0.92rem;
  }

  header > div > a:first-child svg {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }

  main > section[aria-labelledby="hero-title"] p:last-of-type {
    font-size: 0.76rem;
    line-height: 1.7;
  }

  main > section[aria-labelledby="hero-title"] div {
    margin: 1.1rem 0 0.9rem;
    border-radius: var(--radius-sm);
  }

  #cases blockquote {
    padding: 0.85rem 1rem;
  }

  #contact address {
    padding: 0.85rem 1rem;
  }

  footer > p {
    font-size: 0.74rem;
  }
}

@media (hover: none) {
  main > section:hover,
  #articles article:hover,
  #howto ol li:hover,
  #articles article:hover h3 {
    transform: none;
  }
}

@media print {
  header,
  footer,
  nav[aria-label="页内锚点导航"],
  nav[aria-label="面包屑导航"] {
    display: none;
  }

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

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

  a {
    color: #000;
    text-decoration: underline;
  }
}