:root {
  --brand-primary: #8B1A1A;
  --brand-primary-dark: #6d1414;
  --brand-primary-light: #a82525;
  --brand-accent: #F2C14E;
  --brand-accent-soft: #f7d98a;
  --brand-green: #4A7C59;
  --brand-green-soft: #6fa37e;
  --bg-page: #faf7f2;
  --bg-page-alt: #f3ede4;
  --bg-card: #ffffff;
  --bg-card-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-strong: rgba(255, 255, 255, 0.85);
  --text-main: #2b2320;
  --text-sub: #6b5f57;
  --text-muted: #92847a;
  --text-inverse: #ffffff;
  --border-soft: rgba(139, 26, 26, 0.12);
  --border-glass: rgba(255, 255, 255, 0.5);
  --shadow-sm: 0 2px 8px rgba(43, 35, 32, 0.06);
  --shadow-md: 0 8px 24px rgba(43, 35, 32, 0.1);
  --shadow-lg: 0 18px 48px rgba(43, 35, 32, 0.16);
  --shadow-brand: 0 10px 30px rgba(139, 26, 26, 0.22);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Songti SC", "STSong", "Noto Serif SC", Georgia, serif;
  --space-xs: 6px;
  --space-sm: 12px;
  --space-md: 20px;
  --space-lg: 32px;
  --space-xl: 56px;
  --space-2xl: 88px;
  --max-width: 1180px;
  --header-height: 72px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
  --gradient-brand: linear-gradient(135deg, #8B1A1A 0%, #a82525 40%, #4A7C59 100%);
  --gradient-accent: linear-gradient(135deg, #F2C14E 0%, #f7d98a 100%);
  --gradient-hero: linear-gradient(135deg, #8B1A1A 0%, #6d1414 45%, #4A7C59 100%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #14100e;
    --bg-page-alt: #1b1613;
    --bg-card: #221b17;
    --bg-card-glass: rgba(34, 27, 23, 0.68);
    --bg-glass-strong: rgba(34, 27, 23, 0.86);
    --text-main: #f3ede6;
    --text-sub: #c9bdb2;
    --text-muted: #9c8f84;
    --border-soft: rgba(242, 193, 78, 0.16);
    --border-glass: rgba(255, 255, 255, 0.1);
    --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-brand: 0 10px 30px rgba(139, 26, 26, 0.45);
    --gradient-hero: linear-gradient(135deg, #5c1010 0%, #3b0b0b 45%, #24402d 100%);
  }
}

*,
*::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-main);
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 8% 12%, rgba(242, 193, 78, 0.10) 0%, transparent 38%),
    radial-gradient(circle at 92% 8%, rgba(139, 26, 26, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(74, 124, 89, 0.08) 0%, transparent 45%);
  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), opacity var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--brand-primary-light);
}

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

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

h1 {
  font-size: clamp(1.85rem, 4.6vw, 3rem);
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2.05rem);
  font-weight: 700;
  position: relative;
  padding-left: 18px;
  margin-top: 0;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  box-shadow: 0 0 12px rgba(242, 193, 78, 0.6);
}

h3 {
  font-size: clamp(1.12rem, 2.2vw, 1.4rem);
  font-weight: 700;
  color: var(--brand-primary);
  margin-top: var(--space-lg);
}

h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--brand-green);
}

p {
  margin: 0 0 var(--space-md);
  color: var(--text-sub);
}

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

ul,
ol {
  margin: 0 0 var(--space-md);
  padding-left: 1.4em;
  color: var(--text-sub);
}

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

li::marker {
  color: var(--brand-accent);
  font-weight: 700;
}

blockquote {
  margin: var(--space-md) 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card-glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-left: 4px solid var(--brand-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
}

blockquote p {
  margin: 0;
  font-style: italic;
  color: var(--text-main);
}

time {
  font-variant-numeric: tabular-nums;
  color: var(--brand-green);
  font-weight: 600;
}

address {
  font-style: normal;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass-strong);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

header > div {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

header > div > a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.12rem;
  color: var(--text-main);
  white-space: nowrap;
  transition: transform var(--transition-fast);
}

header > div > a:hover {
  transform: translateY(-1px);
}

header > div > a svg {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-brand);
  flex-shrink: 0;
}

header nav {
  flex: 1 1 auto;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

header nav ul li {
  margin: 0;
}

header nav ul li a {
  display: inline-block;
  padding: 6px 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-sub);
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

header nav ul li a:hover,
header nav ul li a:focus-visible {
  background: var(--gradient-brand);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-brand);
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 6px;
  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: 9px 16px;
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--text-main);
  background: var(--bg-card-glass);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  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(--text-muted);
}

header form[role="search"] input[type="search"]:focus {
  width: 240px;
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 4px rgba(242, 193, 78, 0.22);
  outline: none;
}

header form[role="search"] button {
  padding: 9px 18px;
  font-size: 0.88rem;
  font-weight: 700;
  font-family: inherit;
  color: var(--text-inverse);
  background: var(--gradient-brand);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  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-brand);
  filter: brightness(1.08);
}

header > div > button[type="button"] {
  padding: 9px 16px;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: inherit;
  color: var(--brand-primary);
  background: var(--bg-card-glass);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

header > div > button[type="button"]:hover {
  background: var(--brand-accent);
  color: var(--brand-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(242, 193, 78, 0.4);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md) var(--space-2xl);
}

main > nav[aria-label="面包屑导航"] {
  margin-bottom: var(--space-lg);
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
}

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

main > nav[aria-label="面包屑导航"] ol li:not(:last-child)::after {
  content: "›";
  margin-left: 6px;
  color: var(--brand-accent);
  font-weight: 700;
}

main > nav[aria-label="面包屑导航"] ol li a {
  color: var(--text-sub);
  font-weight: 600;
}

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

main > nav[aria-label="面包屑导航"] ol li[aria-current="page"] {
  color: var(--brand-primary);
  font-weight: 700;
}

main > section {
  position: relative;
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

main > section:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(139, 26, 26, 0.22);
}

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

main > section[aria-labelledby="hero-title"] {
  background: var(--gradient-hero);
  color: var(--text-inverse);
  border: none;
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  isolation: isolate;
}

main > section[aria-labelledby="hero-title"]::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(242, 193, 78, 0.35) 0%, transparent 30%),
    radial-gradient(circle at 12% 85%, rgba(255, 255, 255, 0.12) 0%, transparent 35%);
  pointer-events: none;
  z-index: -1;
}

main > section[aria-labelledby="hero-title"]::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 2px dashed rgba(242, 193, 78, 0.4);
  pointer-events: none;
  z-index: -1;
  animation: spinSlow 40s linear infinite;
}

@keyframes spinSlow {
  to { transform: rotate(360deg); }
}

main > section[aria-labelledby="hero-title"] h1 {
  background: none;
  -webkit-text-fill-color: var(--text-inverse);
  color: var(--text-inverse);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
  margin-bottom: var(--space-md);
}

main > section[aria-labelledby="hero-title"] > p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 780px;
  font-size: 1.02rem;
}

main > section[aria-labelledby="hero-title"] > p:nth-of-type(2) {
  display: inline-block;
  padding: 6px 16px;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.14);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-pill);
  color: var(--brand-accent-soft);
}

main > section[aria-labelledby="hero-title"] > div {
  margin: var(--space-lg) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: perspective(1200px) rotateX(2deg);
  transition: transform var(--transition-base);
}

main > section[aria-labelledby="hero-title"] > div:hover {
  transform: perspective(1200px) rotateX(0deg) scale(1.01);
}

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

main > section[aria-labelledby="hero-title"] > ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-sm);
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
}

main > section[aria-labelledby="hero-title"] > ul li {
  margin: 0;
  padding: var(--space-md) var(--space-sm);
  text-align: center;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.12);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), background var(--transition-base);
}

main > section[aria-labelledby="hero-title"] > ul li:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.2);
}

main > section[aria-labelledby="hero-title"] > ul li strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--brand-accent);
  line-height: 1.2;
  margin-top: 4px;
  text-shadow: 0 2px 12px rgba(242, 193, 78, 0.4);
}

main > section#products > ul,
main > section#notes > ul,
main > section#news > ul {
  list-style: none;
  padding: 0;
}

main > section#products > ul li,
main > section#notes > ul li {
  position: relative;
  padding: var(--space-sm) var(--space-md) var(--space-sm) 44px;
  margin-bottom: var(--space-sm);
  background: var(--bg-page-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

main > section#products > ul li::before,
main > section#notes > ul li::before {
  content: "✓";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--text-inverse);
  background: var(--gradient-brand);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(139, 26, 26, 0.3);
}

main > section#products > ul li:hover,
main > section#notes > ul li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

main > section#news > ul li {
  position: relative;
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
  border-left: 3px solid var(--brand-accent);
  background: var(--bg-page-alt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

main > section#news > ul li:hover {
  background: var(--bg-card-glass);
  transform: translateX(4px);
}

main > section#cases blockquote {
  margin-bottom: var(--space-md);
}

main > section#cases blockquote::before {
  content: "“";
  position: absolute;
  top: -8px;
  left: 12px;
  font-family: var(--font-serif);
  font-size: 3rem;
  line-height: 1;
  color: var(--brand-accent);
  opacity: 0.6;
}

main > section#articles article {
  position: relative;
  margin-bottom: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-page-alt);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

main > section#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(242, 193, 78, 0.5);
}

main > section#articles article h3 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
  font-size: 1.12rem;
  color: var(--text-main);
  transition: color var(--transition-fast);
}

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

main > section#articles article > p:nth-of-type(1) {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

main > section#articles article > p:nth-of-type(2) {
  font-size: 0.94rem;
  margin-bottom: var(--space-sm);
}

main > section#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 6px 16px;
  color: var(--brand-primary);
  background: transparent;
  border: 1.5px solid var(--brand-primary);
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

main > section#articles article a:hover {
  background: var(--gradient-brand);
  color: var(--text-inverse);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-brand);
}

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

main > section#faq details {
  margin-bottom: var(--space-sm);
  background: var(--bg-page-alt);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

main > section#faq details[open] {
  border-color: rgba(242, 193, 78, 0.55);
  box-shadow: var(--shadow-sm);
}

main > section#faq details summary {
  position: relative;
  padding: var(--space-md) var(--space-lg) var(--space-md) var(--space-md);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

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

main > section#faq details summary::after {
  content: "+";
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--brand-primary);
  background: var(--bg-card);
  border-radius: 50%;
  border: 1px solid var(--border-soft);
  transition: transform var(--transition-base), background var(--transition-fast), color var(--transition-fast);
}

main > section#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--gradient-brand);
  color: var(--text-inverse);
  border-color: transparent;
}

main > section#faq details summary:hover {
  background: var(--bg-card-glass);
  color: var(--brand-primary);
}

main > section#faq details p {
  margin: 0;
  padding: 0 var(--space-lg) var(--space-md) var(--space-md);
  font-size: 0.94rem;
  animation: fadeDown var(--transition-base);
}

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

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

main > section#howto ol li {
  position: relative;
  counter-increment: step;
  padding: var(--space-md) var(--space-md) var(--space-md) 64px;
  margin-bottom: var(--space-sm);
  background: var(--bg-page-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

main > section#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1rem;
  color: var(--text-inverse);
  background: var(--gradient-brand);
  border-radius: 50%;
  box-shadow: var(--shadow-brand);
}

main > section#howto ol li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

main > section#contact address {
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-md);
  background: var(--bg-page-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  margin-bottom: var(--space-md);
}

main > section#contact address p {
  margin: 0;
  font-size: 0.94rem;
}

main > section#contact address a {
  font-weight: 700;
  color: var(--brand-primary);
  border-bottom: 1.5px dashed var(--brand-accent);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

main > section#contact address a:hover {
  color: var(--brand-green);
  border-color: var(--brand-green);
}

main > nav[aria-label="网站地图"] {
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--bg-card-glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

main > nav[aria-label="网站地图"] h2 {
  font-size: 1.3rem;
}

main > nav[aria-label="网站地图"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  padding: 0;
  margin: 0;
}

main > nav[aria-label="网站地图"] ul li {
  margin: 0;
}

main > nav[aria-label="网站地图"] ul li a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-sub);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

main > nav[aria-label="网站地图"] ul li a:hover {
  background: var(--gradient-brand);
  color: var(--text-inverse);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-brand);
}

main > section[aria-labelledby="links-title"] {
  background: var(--bg-page-alt);
  border-style: dashed;
}

main > section[aria-labelledby="links-title"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  list-style: none;
  padding: 0;
  margin: 0;
}

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

main > section[aria-labelledby="links-title"] ul li a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

main > section[aria-labelledby="links-title"] ul li a:hover {
  background: var(--gradient-accent);
  color: var(--brand-primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(242, 193, 78, 0.4);
}

footer {
  position: relative;
  margin-top: var(--space-xl);
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  background: var(--gradient-hero);
  color: rgba(255, 255, 255, 0.82);
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 90% 10%, rgba(242, 193, 78, 0.22) 0%, transparent 32%),
    radial-gradient(circle at 5% 90%, rgba(255, 255, 255, 0.08) 0%, transparent 35%);
  pointer-events: none;
}

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

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

footer > section h2 {
  color: var(--brand-accent);
  font-size: 1.12rem;
  padding-left: 0;
}

footer > section h2::before {
  display: none;
}

footer > section p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.92rem;
  margin-bottom: var(--space-xs);
}

footer > p {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto var(--space-xs);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.62);
  text-align: center;
}

footer > p a {
  display: inline-block;
  padding: 6px 18px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--brand-primary-dark);
  background: var(--gradient-accent);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

footer > p a:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(242, 193, 78, 0.5);
}

body > header,
main > section,
main > nav,
footer > section {
  animation: revealUp 0.6s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

main > section:nth-of-type(1) { animation-delay: 0.05s; }
main > section:nth-of-type(2) { animation-delay: 0.1s; }
main > section:nth-of-type(3) { animation-delay: 0.15s; }
main > section:nth-of-type(4) { animation-delay: 0.2s; }
main > section:nth-of-type(5) { animation-delay: 0.25s; }
main > section:nth-of-type(6) { animation-delay: 0.3s; }
main > section:nth-of-type(7) { animation-delay: 0.35s; }
main > section:nth-of-type(8) { animation-delay: 0.4s; }
main > section:nth-of-type(9) { animation-delay: 0.45s; }
main > section:nth-of-type(10) { animation-delay: 0.5s; }

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

@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: 900px) {
  header > div {
    gap: var(--space-sm);
  }

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

  header nav ul {
    justify-content: center;
  }

  header form[role="search"] {
    flex: 1 1 auto;
    justify-content: flex-end;
  }

  header form[role="search"] input[type="search"] {
    flex: 1 1 auto;
    width: auto;
    min-width: 0;
  }

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

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

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

  main > section[aria-labelledby="hero-title"] > ul {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  header > div {
    padding: 10px var(--space-sm);
  }

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

  header > div > a svg {
    width: 34px;
    height: 34px;
  }

  header nav ul li a {
    padding: 5px 9px;
    font-size: 0.82rem;
  }

  header form[role="search"] {
    order: 4;
    flex-basis: 100%;
    margin-top: 4px;
  }

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

  header > div > button[type="button"] {
    padding: 8px 12px;
    font-size: 0.78rem;
  }

  main {
    padding: var(--space-md) var(--space-sm) var(--space-xl);
  }

  main > section {
    padding: var(--space-md) var(--space-sm);
    margin-bottom: var(--space-lg);
  }

  main > section[aria-labelledby="hero-title"] {
    padding: var(--space-lg) var(--space-md);
  }

  main > section[aria-labelledby="hero-title"] > ul {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  main > section[aria-labelledby="hero-title"] > ul li {
    padding: var(--space-sm) 8px;
    font-size: 0.8rem;
  }

  main > section[aria-labelledby="hero-title"] > ul li strong {
    font-size: 1.3rem;
  }

  main > section#articles article {
    padding: var(--space-md);
  }

  main > section#faq details summary {
    padding: var(--space-sm) 52px var(--space-sm) var(--space-sm);
    font-size: 0.92rem;
  }

  main > section#faq details summary::after {
    right: var(--space-sm);
  }

  main > section#faq details p {
    padding: 0 var(--space-sm) var(--space-sm);
  }

  main > section#howto ol li {
    padding: var(--space-sm) var(--space-sm) var(--space-sm) 54px;
  }

  main > section#howto ol li::before {
    left: 12px;
    width: 28px;
    height: 28px;
    font-size: 0.88rem;
  }

  blockquote {
    padding: var(--space-sm) var(--space-md);
  }

  footer {
    padding: var(--space-lg) var(--space-sm) var(--space-md);
  }
}

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

@media print {
  header,
  footer,
  main > nav,
  main > section[aria-labelledby="links-title"],
  button {
    display: none !important;
  }

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

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

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