:root {
  --color-primary: #7c3aed;
  --color-primary-dark: #5b21b6;
  --color-primary-light: #a78bfa;
  --color-accent: #f59e0b;
  --color-accent-soft: #fde68a;
  --color-pink: #ec4899;
  --color-blue: #2563eb;
  --color-bg: #f7f5ff;
  --color-bg-alt: #ffffff;
  --color-surface: rgba(255, 255, 255, 0.72);
  --color-surface-solid: #ffffff;
  --color-text: #241b3a;
  --color-text-soft: #5b5473;
  --color-text-muted: #8b84a3;
  --color-border: rgba(124, 58, 237, 0.14);
  --color-border-strong: rgba(124, 58, 237, 0.28);
  --shadow-sm: 0 2px 8px rgba(58, 30, 120, 0.06);
  --shadow-md: 0 10px 30px rgba(58, 30, 120, 0.1);
  --shadow-lg: 0 24px 60px rgba(58, 30, 120, 0.16);
  --shadow-glow: 0 8px 32px rgba(124, 58, 237, 0.32);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --glass-blur: 18px;
  --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #a855f7 42%, #ec4899 100%);
  --gradient-banner: linear-gradient(130deg, #2e1065 0%, #6d28d9 38%, #a21caf 70%, #ec4899 100%);
  --gradient-soft: linear-gradient(135deg, rgba(124, 58, 237, 0.12), rgba(236, 72, 153, 0.1));
  --gradient-accent: linear-gradient(120deg, #f59e0b, #fde68a);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", monospace;
  --header-h: 72px;
  --maxw: 1200px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-base: 0.32s var(--ease-out);
}

html[data-theme="dark"] {
  --color-bg: #0c0a17;
  --color-bg-alt: #14102a;
  --color-surface: rgba(28, 22, 52, 0.66);
  --color-surface-solid: #1a1533;
  --color-text: #f2eefc;
  --color-text-soft: #c3bce0;
  --color-text-muted: #8d86ad;
  --color-border: rgba(167, 139, 250, 0.18);
  --color-border-strong: rgba(167, 139, 250, 0.38);
  --color-accent-soft: #fbbf24;
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 12px 34px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 26px 64px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 8px 36px rgba(167, 139, 250, 0.4);
  --gradient-banner: linear-gradient(130deg, #170a33 0%, #3b1273 40%, #6b1a8f 72%, #9d174d 100%);
  --gradient-soft: linear-gradient(135deg, rgba(124, 58, 237, 0.22), rgba(236, 72, 153, 0.16));
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --color-bg: #0c0a17;
    --color-bg-alt: #14102a;
    --color-surface: rgba(28, 22, 52, 0.66);
    --color-surface-solid: #1a1533;
    --color-text: #f2eefc;
    --color-text-soft: #c3bce0;
    --color-text-muted: #8d86ad;
    --color-border: rgba(167, 139, 250, 0.18);
    --color-border-strong: rgba(167, 139, 250, 0.38);
    --color-accent-soft: #fbbf24;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 12px 34px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 26px 64px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 8px 36px rgba(167, 139, 250, 0.4);
    --gradient-banner: linear-gradient(130deg, #170a33 0%, #3b1273 40%, #6b1a8f 72%, #9d174d 100%);
    --gradient-soft: linear-gradient(135deg, rgba(124, 58, 237, 0.22), rgba(236, 72, 153, 0.16));
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 12% -8%, rgba(124, 58, 237, 0.16), transparent 46%),
    radial-gradient(circle at 92% 4%, rgba(236, 72, 153, 0.14), transparent 42%),
    radial-gradient(circle at 50% 100%, rgba(37, 99, 235, 0.08), transparent 52%);
  background-attachment: fixed;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

img,
svg,
video {
  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,
a:focus-visible {
  color: var(--color-pink);
}

html[data-theme="dark"] a {
  color: var(--color-primary-light);
}

html[data-theme="dark"] a:hover,
html[data-theme="dark"] a:focus-visible {
  color: #f9a8d4;
}

:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 3px;
  border-radius: 6px;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--color-text);
}

h1 { font-size: clamp(1.85rem, 4.4vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.45rem); }
h4 { font-size: 1.1rem; }

p {
  margin: 0 0 1.1em;
  color: var(--color-text-soft);
}

ul, ol {
  margin: 0 0 1.2em;
  padding-left: 1.3em;
}

li {
  margin-bottom: 0.45em;
  color: var(--color-text-soft);
}

strong { color: var(--color-text); }

blockquote {
  margin: 0 0 1.4em;
  padding: 1.3em 1.5em;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  background: var(--color-surface);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

blockquote p {
  margin-bottom: 0.6em;
  font-size: 1.02rem;
  color: var(--color-text);
}

blockquote footer {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

html[data-theme="dark"] blockquote footer { color: var(--color-primary-light); }

code, pre, kbd {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

time {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 0.5em;
}

address {
  font-style: normal;
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "brand nav search"
    "brand nav actions";
  align-items: center;
  gap: 0 22px;
  padding: 12px clamp(16px, 4vw, 44px);
  background: var(--color-surface);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#site-header::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--gradient-brand);
  opacity: 0.9;
}

.brand-bar {
  grid-area: brand;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-bar > a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
}

.brand-bar svg {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-glow);
  transition: transform 0.5s var(--ease-spring), box-shadow var(--transition-base);
}

.brand-bar > a:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

.brand-name {
  font-size: 1.32rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
}

.brand-slogan {
  margin: 0;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

#main-nav {
  grid-area: nav;
  min-width: 0;
}

#main-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

#main-nav li { margin: 0; }

#main-nav a {
  position: relative;
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-soft);
  white-space: nowrap;
  transition: color var(--transition-base), background var(--transition-base), transform var(--transition-base);
}

#main-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-brand);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

#main-nav a:hover,
#main-nav a:focus-visible {
  color: var(--color-primary);
  background: var(--gradient-soft);
  transform: translateY(-2px);
}

#main-nav a:hover::after,
#main-nav a:focus-visible::after {
  width: 60%;
}

html[data-theme="dark"] #main-nav a:hover,
html[data-theme="dark"] #main-nav a:focus-visible {
  color: var(--color-primary-light);
}

#site-search {
  grid-area: search;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 6px 6px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

#site-search:focus-within {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-glow);
}

#site-search label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

#search-input {
  flex: 1 1 auto;
  min-width: 90px;
  max-width: 220px;
  padding: 6px 0;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--color-text);
}

#search-input::placeholder {
  color: var(--color-text-muted);
}

#search-input:focus {
  outline: none;
}

#site-search button {
  flex: 0 0 auto;
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  color: #fff;
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), filter var(--transition-base), box-shadow var(--transition-base);
}

#site-search button:hover {
  transform: translateY(-2px) scale(1.03);
  filter: brightness(1.08);
}

#site-search button:active {
  transform: translateY(0) scale(0.98);
}

#theme-toggle,
#mobile-menu-toggle {
  grid-area: actions;
  justify-self: end;
  align-self: center;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  color: var(--color-text-soft);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all var(--transition-base);
}

#theme-toggle {
  margin-right: 10px;
}

#theme-toggle:hover,
#mobile-menu-toggle:hover {
  color: #fff;
  background: var(--gradient-brand);
  border-color: transparent;
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

#mobile-menu-toggle {
  display: none;
}

main {
  display: block;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(20px, 4vw, 48px) clamp(16px, 4vw, 44px) 80px;
}

main > section {
  position: relative;
  margin-bottom: clamp(34px, 5vw, 64px);
  padding: clamp(22px, 3.4vw, 42px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  scroll-margin-top: calc(var(--header-h) + 20px);
  opacity: 0;
  transform: translateY(34px);
  animation: reveal-up 0.85s var(--ease-out) forwards;
}

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

main > section:nth-of-type(1) { animation-delay: 0.02s; }
main > section:nth-of-type(2) { animation-delay: 0.06s; }
main > section:nth-of-type(3) { animation-delay: 0.1s; }
main > section:nth-of-type(4) { animation-delay: 0.14s; }
main > section:nth-of-type(5) { animation-delay: 0.18s; }
main > section:nth-of-type(6) { animation-delay: 0.22s; }
main > section:nth-of-type(7) { animation-delay: 0.26s; }
main > section:nth-of-type(8) { animation-delay: 0.3s; }
main > section:nth-of-type(9) { animation-delay: 0.34s; }
main > section:nth-of-type(10) { animation-delay: 0.38s; }
main > section:nth-of-type(n+11) { animation-delay: 0.42s; }

@keyframes reveal-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main > section > h2 {
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
  margin-bottom: 1.1em;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 6px;
  width: 5px;
  height: calc(100% - 22px);
  border-radius: 4px;
  background: var(--gradient-brand);
  opacity: 0.85;
}

main > section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-accent);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}

main > section > h3 {
  margin-top: 1.6em;
  padding-left: 14px;
  border-left: 3px solid var(--color-primary-light);
  color: var(--color-text);
}

#hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 62px) clamp(22px, 4vw, 54px);
  border: none;
  border-radius: var(--radius-lg);
  color: #fff;
  background: var(--gradient-banner);
  background-size: 180% 180%;
  animation: reveal-up 0.85s var(--ease-out) forwards, banner-shift 16s ease-in-out infinite alternate;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

@keyframes banner-shift {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

#hero::before {
  content: "";
  position: absolute;
  width: 460px;
  height: 460px;
  top: -180px;
  right: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(253, 230, 138, 0.4), transparent 68%);
  pointer-events: none;
  animation: float-orb 11s ease-in-out infinite;
}

#hero::after {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  bottom: -160px;
  left: -110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.42), transparent 70%);
  pointer-events: none;
  animation: float-orb 14s ease-in-out infinite reverse;
}

@keyframes float-orb {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-26px, 22px, 0) scale(1.1); }
}

#hero h1,
#hero p {
  position: relative;
  z-index: 2;
}

#hero h1 {
  color: #fff;
  text-shadow: 0 4px 26px rgba(0, 0, 0, 0.32);
  letter-spacing: 0.02em;
}

#hero h1::after {
  content: "";
  display: block;
  width: 96px;
  height: 5px;
  margin-top: 18px;
  border-radius: 5px;
  background: var(--gradient-accent);
  box-shadow: 0 6px 22px rgba(245, 158, 11, 0.55);
}

#hero > p {
  max-width: 76ch;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(0.95rem, 1.5vw, 1.06rem);
}

.hero-carousel {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 34px 0 30px;
}

.carousel-item {
  position: relative;
  overflow: hidden;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.22);
  transition: transform 0.45s var(--ease-out), box-shadow var(--transition-base), background var(--transition-base);
}

.carousel-item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.24), transparent 58%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.carousel-item:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 26px 56px rgba(0, 0, 0, 0.34);
  background: rgba(255, 255, 255, 0.2);
}

.carousel-item:hover::before {
  opacity: 1;
}

.carousel-item svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.22);
  transition: transform 0.6s var(--ease-spring);
}

.carousel-item:hover svg {
  transform: scale(1.05) rotate(-0.6deg);
}

.carousel-item h3 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 1.14rem;
  letter-spacing: 0.02em;
}

.carousel-item p {
  margin: 0;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.84);
}

.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin-top: 8px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-stats > div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: transform var(--transition-base), background var(--transition-base);
}

.hero-stats > div:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.2);
}

.hero-stats strong {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  line-height: 1.1;
  color: #fff;
  letter-spacing: 0.02em;
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.34);
}

.hero-stats span {
  margin-top: 4px;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.82);
}

#breadcrumb {
  margin-bottom: 22px;
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  animation: none;
  opacity: 1;
  transform: none;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.86rem;
}

#breadcrumb li {
  margin: 0;
  color: var(--color-text-muted);
}

#breadcrumb li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--color-primary-light);
  font-weight: 700;
}

#breadcrumb a {
  font-weight: 600;
  color: var(--color-text-soft);
}

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

#toc {
  margin-bottom: clamp(30px, 4vw, 52px);
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background:
    linear-gradient(150deg, rgba(124, 58, 237, 0.1), rgba(236, 72, 153, 0.06)),
    var(--color-surface);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  box-shadow: var(--shadow-md);
  animation: reveal-up 0.85s var(--ease-out) forwards;
  animation-delay: 0.04s;
  opacity: 0;
  transform: translateY(34px);
}

#toc h2 {
  margin: 0 0 0.9em;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

#toc ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

#toc li {
  margin: 0;
}

#toc a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-soft);
  border: 1px solid transparent;
  transition: all var(--transition-base);
}

#toc a:hover,
#toc a:focus-visible {
  color: var(--color-primary);
  background: var(--color-bg-alt);
  border-color: var(--color-border-strong);
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] #toc a:hover,
html[data-theme="dark"] #toc a:focus-visible {
  color: var(--color-primary-light);
}

#products,
#solutions,
#applications,
#news,
#articles {
  display: block;
}

#products > h3 + p,
#solutions > h3 + p {
  margin-bottom: 1.4em;
}

#products > h3,
#advantages > h3,
#solutions > h3,
#applications > h3,
#culture > h3,
#knowledge > h3,
#howto > h3 {
  position: relative;
  padding: 12px 16px 12px 20px;
  border-radius: var(--radius-sm);
  background: var(--gradient-soft);
  border-left: 4px solid var(--color-primary);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#products > h3:hover,
#advantages > h3:hover,
#solutions > h3:hover,
#applications > h3:hover,
#culture > h3:hover,
#knowledge > h3:hover,
#howto > h3:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

#cases > h3,
#news > article h3,
#articles > article h3 {
  margin-top: 1.4em;
}

#news > article,
#articles > article {
  position: relative;
  padding: 20px 22px;
  margin-bottom: 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#news > article::before,
#articles > article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 4px;
  border-radius: 4px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

#news > article:hover::before,
#articles > article:hover::before {
  opacity: 1;
}

#news > article h3,
#articles > article h3 {
  margin-top: 0;
  font-size: 1.12rem;
  transition: color var(--transition-base);
}

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

html[data-theme="dark"] #news > article:hover h3,
html[data-theme="dark"] #articles > article:hover h3 {
  color: var(--color-primary-light);
}

#news > article p,
#articles > article p {
  font-size: 0.94rem;
  margin-bottom: 0.8em;
}

#news > article a,
#articles > article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

#news > article a::after,
#articles > article a::after {
  content: "→";
  transition: transform var(--transition-base);
}

#news > article a:hover::after,
#articles > article a:hover::after {
  transform: translateX(5px);
}

#reviews blockquote {
  position: relative;
  padding-left: 3.2em;
}

#reviews blockquote::before {
  content: "“";
  position: absolute;
  left: 14px;
  top: 4px;
  font-size: 3.4rem;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--color-primary-light);
  opacity: 0.6;
}

#faq details {
  margin-bottom: 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

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

#faq details[open] {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

#faq summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition-base), color var(--transition-base);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  background: var(--gradient-brand);
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), filter var(--transition-base);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  filter: brightness(1.1);
}

#faq summary:hover {
  background: var(--gradient-soft);
  color: var(--color-primary);
}

html[data-theme="dark"] #faq summary:hover {
  color: var(--color-primary-light);
}

#faq details > p {
  margin: 0;
  padding: 0 22px 20px;
  font-size: 0.93rem;
  animation: fade-slide 0.42s var(--ease-out);
}

@keyframes fade-slide {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

#contact address ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
  margin: 0 0 1.6em;
  padding: 0;
  list-style: none;
}

#contact address li {
  position: relative;
  margin: 0;
  padding: 14px 16px 14px 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  font-size: 0.92rem;
  color: var(--color-text-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#contact address li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-brand);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.14);
}

#contact address li:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

#sitemap a,
#links a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-soft);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

#sitemap a:hover,
#links a:hover,
#sitemap a:focus-visible,
#links a:focus-visible {
  color: #fff;
  background: var(--gradient-brand);
  border-color: transparent;
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

#legal h3,
#eeat h3 {
  margin-top: 1.5em;
}

#eeat {
  background:
    linear-gradient(140deg, rgba(245, 158, 11, 0.1), rgba(124, 58, 237, 0.08)),
    var(--color-surface);
}

#site-footer {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 5vw, 64px) clamp(20px, 5vw, 56px) 34px;
  color: rgba(255, 255, 255, 0.86);
  background: var(--gradient-banner);
  background-size: 160% 160%;
  animation: banner-shift 20s ease-in-out infinite alternate;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 620px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(253, 230, 138, 0.22), transparent 70%);
  pointer-events: none;
}

#site-footer > * {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
}

#site-footer h2 {
  margin: 0 0 0.3em;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: #fff;
}

#site-footer p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.92rem;
}

#site-footer nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}

#site-footer nav li {
  margin: 0;
}

#site-footer nav a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  padding-bottom: 3px;
}

#site-footer nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-base);
}

#site-footer nav a:hover {
  color: #fff;
}

#site-footer nav a:hover::after {
  width: 100%;
}

#site-footer address p {
  margin: 0 0 6px;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.78);
}

#site-footer > p:last-child {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.72);
}

#back-to-top {
  position: fixed;
  right: clamp(14px, 3vw, 34px);
  bottom: clamp(14px, 3vw, 34px);
  z-index: 950;
  padding: 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  color: #fff;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform var(--transition-base), box-shadow var(--transition-base), filter var(--transition-base);
}

#back-to-top:hover {
  transform: translateY(-5px) scale(1.05);
  filter: brightness(1.1);
  box-shadow: 0 16px 42px rgba(124, 58, 237, 0.5);
}

#back-to-top:active {
  transform: translateY(-2px) scale(0.98);
}

@media (max-width: 1080px) {
  #site-header {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "brand actions"
      "nav nav"
      "search search";
    row-gap: 10px;
  }

  #main-nav ul {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  #main-nav ul::-webkit-scrollbar {
    height: 4px;
  }

  #main-nav ul::-webkit-scrollbar-thumb {
    background: var(--color-border-strong);
    border-radius: 4px;
  }

  #site-search {
    justify-self: stretch;
  }

  #search-input {
    max-width: none;
  }

  #theme-toggle {
    margin-right: 8px;
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 64px;
  }

  body {
    font-size: 15px;
    line-height: 1.72;
  }

  #site-header {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand menu"
      "search search"
      "nav nav";
    padding: 10px 16px;
  }

  .brand-slogan {
    display: none;
  }

  .brand-name {
    font-size: 1.16rem;
  }

  #mobile-menu-toggle {
    display: inline-block;
  }

  #theme-toggle {
    position: absolute;
    right: 16px;
    top: 66px;
    margin: 0;
    padding: 6px 12px;
    font-size: 0.74rem;
    z-index: 5;
  }

  #main-nav {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.45s var(--ease-out), opacity var(--transition-base);
  }

  #site-header.menu-open #main-nav {
    max-height: 420px;
    opacity: 1;
  }

  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 8px 0 4px;
  }

  #main-nav a {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
  }

  #main-nav a::after {
    display: none;
  }

  #site-search {
    padding: 4px 4px 4px 14px;
  }

  #site-search button {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  main {
    padding: 18px 14px 60px;
  }

  main > section {
    padding: 20px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 26px;
  }

  main > section > h2::before {
    left: -10px;
  }

  #hero {
    padding: 26px 18px;
  }

  .hero-carousel {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .hero-stats > div {
    padding: 12px;
  }

  #toc ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px 10px;
  }

  #toc a {
    padding: 8px 10px;
    font-size: 0.82rem;
  }

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

  blockquote {
    padding: 1.1em 1.2em;
  }

  #reviews blockquote {
    padding-left: 2.6em;
  }

  #faq summary {
    padding: 14px 46px 14px 16px;
    font-size: 0.92rem;
  }

  #back-to-top {
    padding: 10px 14px;
    font-size: 0.76rem;
  }
}

@media (max-width: 420px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }

  #toc ul {
    grid-template-columns: 1fr;
  }

  #theme-toggle {
    top: 62px;
  }
}

@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;
  }

  main > section,
  #toc {
    opacity: 1;
    transform: none;
  }
}

@media print {
  #site-header,
  #toc,
  #back-to-top,
  #site-footer,
  #site-search {
    display: none !important;
  }

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

  main > section {
    box-shadow: none;
    border: 1px solid #ddd;
    opacity: 1;
    transform: none;
  }
}