:root {
  --color-primary: #8B4513;
  --color-primary-light: #A0522D;
  --color-primary-dark: #6B3410;
  --color-accent: #D2691E;
  --color-accent-light: #E8A87C;
  --color-secondary: #2E7D32;
  --color-bg: #FAF6F1;
  --color-bg-alt: #F0E8DE;
  --color-surface: #FFFFFF;
  --color-surface-glass: rgba(255, 255, 255, 0.72);
  --color-text: #2C2420;
  --color-text-secondary: #5C524B;
  --color-text-muted: #8A7E75;
  --color-border: #E0D6CB;
  --color-shadow: rgba(139, 69, 19, 0.12);
  --color-shadow-strong: rgba(139, 69, 19, 0.22);
  --gradient-hero: linear-gradient(135deg, #8B4513 0%, #A0522D 35%, #D2691E 70%, #E8A87C 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(250,246,241,0.7));
  --gradient-accent: linear-gradient(135deg, #D2691E, #E8A87C);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", Georgia, serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --max-width: 1180px;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #C97B4A;
    --color-primary-light: #D99566;
    --color-primary-dark: #A86238;
    --color-accent: #E8A87C;
    --color-accent-light: #F0C4A0;
    --color-secondary: #6BBF70;
    --color-bg: #1A1512;
    --color-bg-alt: #221C18;
    --color-surface: #2A231E;
    --color-surface-glass: rgba(42, 35, 30, 0.72);
    --color-text: #F0E8DE;
    --color-text-secondary: #C4B8AC;
    --color-text-muted: #8A7E75;
    --color-border: #3D342D;
    --color-shadow: rgba(0, 0, 0, 0.35);
    --color-shadow-strong: rgba(0, 0, 0, 0.55);
    --gradient-hero: linear-gradient(135deg, #3D2415 0%, #5C3A22 35%, #8B5A30 70%, #A87B4E 100%);
    --gradient-card: linear-gradient(145deg, rgba(42,35,30,0.9), rgba(34,28,24,0.7));
    --gradient-accent: linear-gradient(135deg, #C97B4A, #E8A87C);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(210, 105, 30, 0.06), transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 20%, rgba(139, 69, 19, 0.05), transparent 55%),
    radial-gradient(ellipse 50% 60% at 50% 100%, rgba(232, 168, 124, 0.04), transparent 60%);
  pointer-events: none;
}

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

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

a:hover {
  color: var(--color-accent);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

ul,
ol {
  list-style-position: outside;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.4rem;
}

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

h1 {
  font-size: clamp(1.75rem, 4.5vw, 3rem);
}

h2 {
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  position: relative;
  padding-bottom: 0.75rem;
  margin-bottom: var(--space-md);
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: var(--gradient-accent);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--color-primary-dark);
}

p {
  margin-bottom: var(--space-sm);
  color: var(--color-text-secondary);
}

blockquote {
  margin: var(--space-md) 0;
  padding: var(--space-md) var(--space-md) var(--space-md) var(--space-lg);
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  position: relative;
  font-style: normal;
}

blockquote::before {
  content: "\201C";
  position: absolute;
  left: 0.5rem;
  top: 0.25rem;
  font-size: 2.5rem;
  font-family: var(--font-serif);
  color: var(--color-accent);
  opacity: 0.5;
  line-height: 1;
}

blockquote p {
  color: var(--color-text);
  font-style: italic;
  margin-bottom: var(--space-xs);
}

blockquote p:last-child {
  margin-bottom: 0;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface-glass);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 20px var(--color-shadow);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

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

header a[aria-label="91妈妈首页"] {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  position: relative;
  padding: 0.2rem 0;
  white-space: nowrap;
}

header a[aria-label="91妈妈首页"]::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

header a[aria-label="91妈妈首页"]:hover::after {
  transform: scaleX(1);
}

nav[aria-label="主导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

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

nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-base), background var(--transition-base), transform var(--transition-base);
}

nav[aria-label="主导航"] a:hover {
  color: var(--color-primary);
  background: rgba(210, 105, 30, 0.08);
  transform: translateY(-1px);
}

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

main > section {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

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

#hero {
  padding: var(--space-2xl) var(--space-lg);
  margin: var(--space-md) 0 var(--space-lg);
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  position: relative;
  overflow: hidden;
  border-bottom: none;
  box-shadow: 0 20px 60px var(--color-shadow-strong);
}

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.15), transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.08), transparent 70%);
  pointer-events: none;
}

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

#hero h1 {
  color: #FFFFFF;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

#hero p {
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.05rem;
  max-width: 820px;
  position: relative;
  z-index: 1;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.15);
}

#hero p:last-child {
  margin-bottom: 0;
}

#about,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#knowledge,
#contact,
#sitemap,
#links {
  scroll-margin-top: 80px;
}

#products ul,
#solutions ul,
#howto ul,
#howto ol {
  background: var(--color-surface);
  padding: var(--space-md) var(--space-md) var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 12px var(--color-shadow);
  border: 1px solid var(--color-border);
}

#products ul li,
#solutions ul li,
#howto ul li,
#howto ol li {
  color: var(--color-text-secondary);
  padding-left: 0.25rem;
}

#products ul li::marker,
#solutions ul li::marker {
  color: var(--color-accent);
}

#about ul {
  padding-left: 1.5rem;
}

#about ul li {
  color: var(--color-text-secondary);
}

#about ul li::marker {
  color: var(--color-accent);
}

#cases h3 {
  display: inline-block;
  padding: 0.25rem 0.9rem;
  background: var(--gradient-accent);
  color: #FFFFFF;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  margin-top: var(--space-md);
}

#news ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-md);
}

#news li {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 18px var(--color-shadow);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

#news li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

#news li:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px var(--color-shadow-strong);
  border-color: var(--color-accent-light);
}

#news li:hover::before {
  transform: scaleY(1);
}

#news li h3 {
  margin-top: 0;
  color: var(--color-primary-dark);
}

#news li p {
  margin-bottom: 0.25rem;
  font-size: 0.92rem;
}

#news li p:first-of-type {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

#articles article {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-md);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 18px var(--color-shadow);
  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;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px var(--color-shadow-strong);
  border-color: var(--color-accent-light);
}

#articles article:hover::after {
  transform: scaleX(1);
}

#articles article h3 {
  margin-top: 0;
  color: var(--color-primary-dark);
  transition: color var(--transition-base);
}

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

#articles article p:nth-of-type(1) {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

#articles article p:nth-of-type(2) {
  font-size: 0.95rem;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-sm);
  background: rgba(210, 105, 30, 0.1);
  color: var(--color-primary);
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base), gap var(--transition-base);
}

#articles article a::after {
  content: "\2192";
  transition: transform var(--transition-base);
}

#articles article a:hover {
  background: var(--gradient-accent);
  color: #FFFFFF;
  transform: translateX(2px);
}

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

#faq h3 {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  margin-top: var(--space-sm);
  margin-bottom: 0;
  font-size: 1.02rem;
  color: var(--color-primary-dark);
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  cursor: default;
}

#faq h3:hover {
  background: var(--color-bg-alt);
  border-left-color: var(--color-primary);
  box-shadow: 0 4px 14px var(--color-shadow);
}

#faq h3 + p {
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
  background: var(--color-bg-alt);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-size: 0.94rem;
}

#howto ol {
  counter-reset: howto-step;
  list-style: none;
  padding-left: var(--space-md);
}

#howto ol li {
  counter-increment: howto-step;
  position: relative;
  padding-left: 2.25rem;
  margin-bottom: 0.6rem;
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px var(--color-shadow);
}

#howto h3 {
  color: var(--color-primary-dark);
}

#contact p {
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--color-border);
}

#contact p:last-child {
  border-bottom: none;
}

#contact a {
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--color-accent-light);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-base);
}

#contact a:hover {
  text-decoration-color: var(--color-accent);
}

#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

#sitemap a:hover,
#links a:hover {
  background: var(--gradient-accent);
  color: #FFFFFF;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--color-shadow-strong);
}

footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-xl);
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

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

footer h2 {
  font-size: 1.05rem;
  margin-bottom: var(--space-xs);
  padding-bottom: 0.4rem;
  color: var(--color-primary-dark);
}

footer h2::after {
  width: 32px;
  height: 3px;
}

footer p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 0.3rem;
}

#meta-info p {
  font-size: 0.82rem;
}

main > section,
footer > section {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

main > section.is-visible,
footer > section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

#hero {
  opacity: 1;
  transform: none;
}

@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;
  }
  main > section,
  footer > section {
    opacity: 1;
    transform: none;
  }
}

::selection {
  background: var(--color-accent-light);
  color: var(--color-text);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 5px;
  border: 2px solid var(--color-bg-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

@media (max-width: 900px) {
  header > div {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.6rem var(--space-md);
  }
  nav[aria-label="主导航"] {
    width: 100%;
  }
  nav[aria-label="主导航"] ul {
    gap: 0.15rem;
  }
  nav[aria-label="主导航"] a {
    padding: 0.35rem 0.55rem;
    font-size: 0.82rem;
  }
  #hero {
    padding: var(--space-xl) var(--space-md);
    border-radius: var(--radius-lg);
  }
  main > section {
    padding: var(--space-lg) 0;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 0.95rem;
  }
  main {
    padding: 0 0.85rem;
  }
  header > div {
    padding: 0.5rem 0.85rem;
  }
  header a[aria-label="91妈妈首页"] {
    font-size: 1.25rem;
  }
  nav[aria-label="主导航"] ul {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.25rem;
  }
  nav[aria-label="主导航"] ul::-webkit-scrollbar {
    display: none;
  }
  nav[aria-label="主导航"] a {
    white-space: nowrap;
    font-size: 0.8rem;
  }
  #hero {
    padding: var(--space-lg) var(--space-md);
    margin: var(--space-sm) 0;
    border-radius: var(--radius-md);
  }
  #hero p {
    font-size: 0.95rem;
  }
  h2::after {
    width: 40px;
    height: 3px;
  }
  #articles article,
  #news li {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
  }
  #products ul,
  #solutions ul,
  #howto ul,
  #howto ol {
    padding: var(--space-sm) var(--space-sm) var(--space-sm) var(--space-md);
  }
  blockquote {
    padding: var(--space-sm) var(--space-sm) var(--space-sm) var(--space-md);
  }
  footer > section {
    padding: var(--space-sm) var(--space-md);
  }
}

@media (hover: none) {
  #news li:hover,
  #articles article:hover,
  #sitemap a:hover,
  #links a:hover,
  nav[aria-label="主导航"] a:hover {
    transform: none;
  }
}