:root {
  --color-primary: #8B5E3C;
  --color-primary-light: #A67B5B;
  --color-primary-dark: #6B4428;
  --color-accent: #C9A87C;
  --color-accent-light: #D4B896;
  --color-bg: #FDFBF7;
  --color-bg-alt: #F5EFE6;
  --color-bg-card: #FFFFFF;
  --color-text: #3A2E26;
  --color-text-secondary: #6B5D52;
  --color-text-muted: #9B8E82;
  --color-border: #E8DDD0;
  --color-white: #FFFFFF;
  --color-shadow: rgba(139, 94, 60, 0.08);
  --color-shadow-hover: rgba(139, 94, 60, 0.16);
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.4);
  --gradient-banner: linear-gradient(135deg, #8B5E3C 0%, #A67B5B 40%, #C9A87C 100%);
  --gradient-subtle: linear-gradient(135deg, #F5EFE6 0%, #FDFBF7 50%, #F0E8DC 100%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1160px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #C9A87C;
    --color-primary-light: #D4B896;
    --color-primary-dark: #A67B5B;
    --color-accent: #E0C9A8;
    --color-accent-light: #EAD8BC;
    --color-bg: #1A1612;
    --color-bg-alt: #221C17;
    --color-bg-card: #2A231D;
    --color-text: #EDE4D8;
    --color-text-secondary: #C4B8A8;
    --color-text-muted: #8F8274;
    --color-border: #3D342B;
    --color-white: #2A231D;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-hover: rgba(0, 0, 0, 0.45);
    --glass-bg: rgba(42, 35, 29, 0.65);
    --glass-border: rgba(201, 168, 124, 0.15);
    --gradient-banner: linear-gradient(135deg, #2A231D 0%, #3D342B 40%, #4A3D30 100%);
    --gradient-subtle: linear-gradient(135deg, #221C17 0%, #1A1612 50%, #2A231D 100%);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(1.6rem, 4.2vw, 2.6rem); }
h2 { font-size: clamp(1.35rem, 3.2vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.35rem); }
h4 { font-size: clamp(1rem, 1.8vw, 1.15rem); }

p {
  color: var(--color-text-secondary);
  margin-bottom: 0.9em;
}

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

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 2px 20px var(--color-shadow);
  transition: background var(--transition), box-shadow var(--transition);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header nav > a {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.12em;
  position: relative;
  padding: 0.25rem 0.5rem;
  transition: transform var(--transition), color var(--transition);
}

header nav > a::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  bottom: 0;
  height: 2px;
  background: var(--gradient-banner);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

header nav > a:hover::after {
  transform: scaleX(1);
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  align-items: center;
}

header nav ul li a {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

header nav ul li a:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
  transform: translateY(-2px);
}

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

main > nav[aria-label="面包屑导航"] {
  padding: 1.25rem 0 0.25rem;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

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

main > nav[aria-label="面包屑导航"] ol li + li::before {
  content: "›";
  margin-right: 0.4rem;
  color: var(--color-accent);
  font-weight: 700;
}

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

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

#hero {
  margin: 1.5rem 0 2.5rem;
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1.25rem, 4vw, 3rem);
  background: var(--gradient-banner);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px -12px var(--color-shadow-hover);
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

#hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -15%;
  width: 55%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 45%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#hero h1 {
  color: var(--color-white);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

#hero > p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 780px;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  position: relative;
  z-index: 1;
  margin-bottom: 1.75rem;
}

#hero figure {
  position: relative;
  z-index: 1;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  transition: transform var(--transition), box-shadow var(--transition);
}

#hero figure:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.24);
}

#hero figure svg {
  width: 100%;
  height: auto;
  display: block;
}

#hero figcaption {
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
  background: rgba(0, 0, 0, 0.12);
  letter-spacing: 0.05em;
}

main > section:not(#hero) {
  margin: 2rem 0;
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 24px var(--color-shadow);
  transition: box-shadow var(--transition), transform var(--transition);
  animation: fadeUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
}

main > section:not(#hero):hover {
  box-shadow: 0 8px 36px var(--color-shadow-hover);
}

main > section:not(#hero) > h2 {
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  position: relative;
  color: var(--color-primary);
}

main > section:not(#hero) > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 3px;
  background: var(--gradient-banner);
  border-radius: 3px;
}

main > section:not(#hero) > h3 {
  margin: 1.5rem 0 0.6rem;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

main > section:not(#hero) > h3::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

main > section:not(#hero) > h4 {
  margin: 1.1rem 0 0.4rem;
  color: var(--color-text);
}

@media (prefers-color-scheme: dark) {
  main > section:not(#hero) > h3 {
    color: var(--color-primary-light);
  }
}

#products h3,
#solutions h3,
#cases h3,
#news h3,
#howto h3,
#knowledge h3,
#contact h3,
#author h3 {
  padding-left: 0.25rem;
}

#cases p:not(:last-child) {
  margin-bottom: 0.75rem;
}

#cases h3 + p {
  padding-left: 1rem;
  border-left: 3px solid var(--color-accent);
  font-style: italic;
}

#articles {
  display: block;
}

#articles > h2 {
  margin-bottom: 1.5rem;
}

#articles article {
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

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

#articles article:hover {
  transform: translateX(4px) translateY(-2px);
  box-shadow: 0 8px 28px var(--color-shadow-hover);
  border-color: var(--color-accent);
  background: var(--color-bg-card);
}

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

#articles article h3 {
  margin: 0 0 0.4rem;
  color: var(--color-text);
  transition: color var(--transition);
}

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

#articles article > p:nth-of-type(1) {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
}

#articles article > p:nth-of-type(2) {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

#articles article > p:last-child {
  margin: 0;
}

#articles article > p:last-child a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

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

#articles article > p:last-child a:hover {
  background: var(--gradient-banner);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 4px 14px var(--color-shadow-hover);
}

#articles article > p:last-child a:hover::after {
  transform: translateX(3px);
}

#faq > h3 {
  margin-top: 1.5rem;
  padding: 0.85rem 1.1rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--color-accent);
  font-size: 1.02rem;
  color: var(--color-text);
  cursor: default;
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}

#faq > h3::before {
  display: none;
}

#faq > h3:hover {
  background: var(--color-bg-card);
  border-left-color: var(--color-primary);
  transform: translateX(3px);
}

#faq > h3 + p {
  padding: 0.5rem 1.1rem 0.5rem 1.6rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

#howto h4 {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background: var(--gradient-subtle);
  border-radius: 999px;
  font-size: 0.92rem;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

#howto h4 + p {
  padding-left: 0.5rem;
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.5rem;
  margin-top: 0.5rem;
}

#sitemap ul li a,
#links ul li a {
  display: block;
  padding: 0.55rem 0.9rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  color: var(--color-primary);
  background: var(--color-bg-card);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px var(--color-shadow);
}

#contact p {
  font-size: 0.95rem;
}

#contact h3 + p {
  padding-left: 0.5rem;
}

#author p {
  font-size: 0.92rem;
}

footer {
  margin-top: 3rem;
  padding: clamp(2rem, 4vw, 3rem) 1.25rem 1.5rem;
  background: var(--gradient-banner);
  color: var(--color-white);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 1.75rem;
  padding: 0 0.5rem;
  position: relative;
  z-index: 1;
}

footer > section h2 {
  color: var(--color-white);
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  display: inline-block;
}

footer > section p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.88rem;
  line-height: 1.7;
}

footer > p {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 0.5rem 0;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  position: relative;
  z-index: 1;
  letter-spacing: 0.05em;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@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 (max-width: 860px) {
  header nav {
    padding: 0.6rem 1rem;
  }

  header nav ul {
    gap: 0.15rem;
    width: 100%;
    justify-content: center;
    padding-top: 0.35rem;
    border-top: 1px solid var(--color-border);
    margin-top: 0.35rem;
  }

  header nav ul li a {
    font-size: 0.82rem;
    padding: 0.35rem 0.55rem;
  }

  main {
    padding: 0 1rem;
  }

  #hero {
    border-radius: var(--radius-lg);
    margin: 1rem 0 1.75rem;
  }

  main > section:not(#hero) {
    border-radius: var(--radius-md);
    margin: 1.25rem 0;
  }

  #articles article {
    padding: 1rem 1.1rem;
  }

  #faq > h3 {
    font-size: 0.95rem;
    padding: 0.7rem 0.9rem;
  }

  #faq > h3 + p {
    padding: 0.4rem 0.9rem 0.4rem 1.2rem;
    font-size: 0.9rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.4rem;
  }

  footer {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 1.75rem 1rem 1.25rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  header nav > a {
    font-size: 1.25rem;
  }

  header nav ul li a {
    font-size: 0.78rem;
    padding: 0.3rem 0.45rem;
  }

  #hero {
    padding: 1.5rem 1.1rem;
  }

  #hero h1 {
    font-size: 1.35rem;
  }

  main > section:not(#hero) {
    padding: 1.25rem 1rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr 1fr;
  }

  #articles article > p:last-child a {
    width: 100%;
    justify-content: center;
  }
}

@media print {
  header,
  footer,
  #sitemap,
  #links {
    display: none;
  }

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

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