:root {
  --bg-primary: #f7f7fa;
  --bg-secondary: #ffffff;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --bg-glass-strong: rgba(255, 255, 255, 0.82);
  --text-primary: #1a1a2e;
  --text-secondary: #4b4b63;
  --text-muted: #7a7a92;
  --accent: #e94560;
  --accent-soft: #ff6b81;
  --accent-deep: #c22a45;
  --navy: #0f3460;
  --navy-deep: #1a1a2e;
  --border-color: rgba(26, 26, 46, 0.1);
  --border-glass: rgba(255, 255, 255, 0.45);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.16);
  --shadow-accent: 0 8px 28px rgba(233, 69, 96, 0.28);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #0f3460 45%, #e94560 100%);
  --gradient-accent: linear-gradient(135deg, #e94560 0%, #ff6b81 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.6) 100%);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0e0e18;
    --bg-secondary: #16162a;
    --bg-elevated: rgba(26, 26, 46, 0.72);
    --bg-glass: rgba(26, 26, 46, 0.55);
    --bg-glass-strong: rgba(26, 26, 46, 0.85);
    --text-primary: #f2f2f7;
    --text-secondary: #c3c3d4;
    --text-muted: #8f8fa8;
    --accent: #ff5c77;
    --accent-soft: #ff8195;
    --accent-deep: #e94560;
    --navy: #1e4a80;
    --navy-deep: #0a0a14;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-glass: rgba(255, 255, 255, 0.12);
    --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 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-accent: 0 8px 28px rgba(255, 92, 119, 0.32);
    --gradient-hero: linear-gradient(135deg, #0a0a14 0%, #1e4a80 45%, #ff5c77 100%);
    --gradient-card: linear-gradient(145deg, rgba(38, 38, 62, 0.9) 0%, rgba(26, 26, 46, 0.6) 100%);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(233, 69, 96, 0.08), transparent 42%),
    radial-gradient(circle at 88% 22%, rgba(15, 52, 96, 0.1), transparent 46%),
    radial-gradient(circle at 50% 90%, rgba(233, 69, 96, 0.06), transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.85rem, 4.5vw, 3rem);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent);
  margin-bottom: 1.25rem;
  font-weight: 800;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 1.25rem;
  position: relative;
  padding-left: 1.1rem;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 5px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  box-shadow: 0 0 12px rgba(233, 69, 96, 0.5);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

h4 {
  font-size: 1.05rem;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.5rem;
}

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

blockquote {
  margin: 1.25rem 0;
  padding: 1.1rem 1.4rem;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

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

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  padding: 0.75rem clamp(1rem, 4vw, 2.5rem);
  min-height: var(--header-height);
  background: var(--bg-glass-strong);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  animation: slideDown 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

header .brand {
  flex-shrink: 0;
}

header .brand a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent);
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

header .brand a::before {
  content: "♠";
  font-size: 1.5rem;
  -webkit-text-fill-color: var(--accent);
  color: var(--accent);
  display: inline-block;
  transition: transform var(--transition-base);
}

header .brand a:hover {
  transform: scale(1.04);
  filter: drop-shadow(0 4px 12px rgba(233, 69, 96, 0.35));
}

header .brand a:hover::before {
  transform: rotate(-15deg) scale(1.1);
}

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

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.35rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

header nav ul li {
  margin: 0;
}

header nav ul li a {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast),
    transform var(--transition-fast);
}

header nav ul li a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.15rem;
  width: 0;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

header nav ul li a:hover {
  color: var(--accent);
  background: rgba(233, 69, 96, 0.08);
  transform: translateY(-1px);
}

header nav ul li a:hover::after {
  width: 60%;
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
  position: relative;
}

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

header form[role="search"] input[type="search"] {
  width: clamp(140px, 18vw, 220px);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    width var(--transition-base);
}

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

header form[role="search"] input[type="search"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
  width: clamp(160px, 22vw, 260px);
}

header form[role="search"] button {
  padding: 0.5rem 1.1rem;
  font-size: 0.875rem;
  font-family: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: var(--shadow-accent);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

header form[role="search"] button:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 12px 32px rgba(233, 69, 96, 0.4);
}

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

nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem clamp(1rem, 4vw, 2.5rem) 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] ol li {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

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

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

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

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

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(1.25rem, 3vw, 2rem) clamp(1rem, 4vw, 2.5rem) 3rem;
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 3.5vw, 2.75rem);
}

main > section {
  background: var(--gradient-card);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3.5vw, 2.5rem);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base);
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

main > section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 100% 0%,
    rgba(233, 69, 96, 0.06),
    transparent 55%
  );
  pointer-events: none;
}

main > section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.25);
}

main > section:nth-child(1) { animation-delay: 0.05s; }
main > section:nth-child(2) { animation-delay: 0.1s; }
main > section:nth-child(3) { animation-delay: 0.15s; }
main > section:nth-child(4) { animation-delay: 0.2s; }
main > section:nth-child(5) { animation-delay: 0.25s; }
main > section:nth-child(6) { animation-delay: 0.3s; }
main > section:nth-child(7) { animation-delay: 0.35s; }
main > section:nth-child(8) { animation-delay: 0.4s; }
main > section:nth-child(9) { animation-delay: 0.45s; }
main > section:nth-child(10) { animation-delay: 0.5s; }
main > section:nth-child(11) { animation-delay: 0.55s; }
main > section:nth-child(12) { animation-delay: 0.6s; }
main > section:nth-child(13) { animation-delay: 0.65s; }
main > section:nth-child(14) { animation-delay: 0.7s; }
main > section:nth-child(15) { animation-delay: 0.75s; }

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

#intro {
  background: var(--gradient-hero);
  color: #f5f5f5;
  border: none;
  overflow: hidden;
  isolation: isolate;
}

#intro::after {
  content: "";
  position: absolute;
  inset: -40%;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.12), transparent 35%),
    radial-gradient(circle at 80% 70%, rgba(233, 69, 96, 0.35), transparent 45%);
  z-index: -1;
  animation: heroGlow 12s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  from {
    transform: translate3d(-4%, -3%, 0) scale(1);
  }
  to {
    transform: translate3d(4%, 3%, 0) scale(1.08);
  }
}

#intro h1 {
  background: linear-gradient(135deg, #ffffff 0%, #ffd6dd 60%, #ff9fb0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #fff;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
}

#intro p {
  color: rgba(245, 245, 245, 0.9);
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  max-width: 62ch;
}

#intro figure {
  margin: 1.75rem 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

#intro figure:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.5);
}

#intro figure svg {
  width: 100%;
  display: block;
}

#intro figcaption {
  padding: 0.9rem 1.25rem;
  font-size: 0.875rem;
  color: rgba(245, 245, 245, 0.78);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

#about h3,
#products h3,
#solutions h3,
#cases h3,
#news h3,
#articles h3,
#howto h3,
#knowledge h3,
#contact h3 {
  display: inline-block;
  position: relative;
}

#about h3::after,
#products h3::after,
#solutions h3::after,
#cases h3::after,
#news h3::after,
#articles h3::after,
#howto h3::after,
#knowledge h3::after,
#contact h3::after {
  content: "";
  display: block;
  width: 32px;
  height: 3px;
  margin-top: 0.35rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  transition: width var(--transition-base);
}

#about h3:hover::after,
#products h3:hover::after,
#solutions h3:hover::after,
#cases h3:hover::after,
#news h3:hover::after,
#articles h3:hover::after,
#howto h3:hover::after,
#knowledge h3:hover::after,
#contact h3:hover::after {
  width: 64px;
}

#products h4 {
  padding: 0.85rem 1rem;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

#products h4:hover {
  transform: translateX(4px);
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: var(--shadow-sm);
}

#solutions ul {
  list-style: none;
  padding-left: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}

#solutions ul li {
  position: relative;
  padding: 0.85rem 1rem 0.85rem 2.4rem;
  margin: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

#solutions ul li::before {
  content: "♠";
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 1rem;
  transition: transform var(--transition-base);
}

#solutions ul li:hover {
  transform: translateY(-3px);
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: var(--shadow-md);
}

#solutions ul li:hover::before {
  transform: translateY(-50%) rotate(-12deg) scale(1.15);
}

#cases h3 {
  margin-top: 1.5rem;
}

#cases blockquote {
  position: relative;
  padding-left: 3rem;
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 0.8rem;
  top: 0.1rem;
  font-size: 2.6rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.5;
  font-family: Georgia, serif;
}

#news h3 {
  padding-bottom: 0.35rem;
  border-bottom: 1px dashed var(--border-color);
  display: block;
}

#news p:first-of-type {
  font-size: 0.825rem;
  color: var(--text-muted);
  display: inline-block;
  padding: 0.2rem 0.75rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
}

#articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

#articles > h2 {
  grid-column: 1 / -1;
}

#articles article {
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base);
}

#articles article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

#articles article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.3);
}

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

#articles article h3 {
  margin-top: 0;
  font-size: 1.1rem;
  transition: color var(--transition-fast);
}

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

#articles article p:first-of-type {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

#articles article p {
  font-size: 0.925rem;
  flex-grow: 1;
}

#articles article a {
  align-self: flex-start;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  background: rgba(233, 69, 96, 0.1);
  transition: background var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

#articles article a:hover {
  background: var(--gradient-accent);
  color: #fff;
  transform: translateX(4px);
  box-shadow: var(--shadow-accent);
}

#faq details {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast),
    background var(--transition-fast);
}

#faq details:hover {
  border-color: rgba(233, 69, 96, 0.3);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: rgba(233, 69, 96, 0.4);
  box-shadow: var(--shadow-md);
  background: var(--bg-glass-strong);
}

#faq summary {
  cursor: pointer;
  padding: 1rem 3rem 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.975rem;
  color: var(--text-primary);
  list-style: none;
  position: relative;
  transition: color var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--accent);
  background: rgba(233, 69, 96, 0.1);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-fast),
    color var(--transition-fast);
}

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

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

#faq details p {
  padding: 0 1.25rem 1.1rem;
  font-size: 0.925rem;
  margin-bottom: 0;
  animation: fadeIn 0.4s ease both;
}

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

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

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 0.85rem 1rem 0.85rem 3.25rem;
  margin-bottom: 0.65rem;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.825rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-accent);
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.35);
}

#howto ol li:hover {
  transform: translateX(4px);
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: var(--shadow-sm);
}

#howto ul li {
  position: relative;
  padding-left: 1.5rem;
}

#howto ul li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

#knowledge h3 {
  border-left: 3px solid var(--accent);
  padding-left: 0.85rem;
  margin-left: -0.85rem;
}

#contact ul {
  list-style: none;
  padding-left: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.65rem;
}

#contact ul li {
  padding: 0.75rem 1rem;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

#contact ul li:hover {
  border-color: rgba(233, 69, 96, 0.35);
  transform: translateY(-2px);
}

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

#sitemap ul li {
  margin: 0;
}

#sitemap ul li a {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

#sitemap ul li a:hover {
  color: #fff;
  background: var(--gradient-accent);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

#links ul {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

#links ul li {
  margin: 0;
}

#links ul li a {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

#links ul li a:hover {
  color: var(--accent);
  border-color: rgba(233, 69, 96, 0.45);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

footer {
  background: var(--gradient-hero);
  color: rgba(245, 245, 245, 0.85);
  padding: clamp(2rem, 4vw, 3rem) clamp(1rem, 4vw, 2.5rem) 1.5rem;
  margin-top: 2rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 15% 20%,
    rgba(233, 69, 96, 0.25),
    transparent 45%
  );
  pointer-events: none;
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 1.5rem;
  position: relative;
}

footer h2 {
  font-size: 1.15rem;
  color: #fff;
  padding-left: 0;
  margin-bottom: 0.75rem;
}

footer h2::before {
  display: none;
}

footer p {
  color: rgba(245, 245, 245, 0.75);
  font-size: 0.9rem;
  margin-bottom: 0.65rem;
}

footer > p:last-child {
  max-width: var(--max-width);
  margin: 1.5rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  text-align: center;
  font-size: 0.825rem;
  color: rgba(245, 245, 245, 0.6);
  position: relative;
}

@media (max-width: 1024px) {
  header {
    gap: 0.75rem 1rem;
  }

  header nav ul li a {
    padding: 0.35rem 0.6rem;
    font-size: 0.85rem;
  }
}

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

  header .brand {
    order: 1;
  }

  header form[role="search"] {
    order: 2;
    margin-left: auto;
  }

  header nav {
    order: 3;
    flex-basis: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.25rem;
  }

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

  header nav ul {
    flex-wrap: nowrap;
    width: max-content;
  }

  header nav ul li a {
    white-space: nowrap;
  }

  header form[role="search"] input[type="search"] {
    width: 130px;
  }

  header form[role="search"] input[type="search"]:focus {
    width: 150px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  main {
    gap: 1.25rem;
    padding: 1rem 0.85rem 2rem;
  }

  main > section {
    padding: 1.25rem 1.1rem;
    border-radius: var(--radius-md);
  }

  h2 {
    padding-left: 0.9rem;
  }

  h2::before {
    width: 4px;
  }

  #articles {
    grid-template-columns: 1fr;
  }

  #solutions ul,
  #contact ul {
    grid-template-columns: 1fr;
  }

  #intro figure {
    margin-top: 1.25rem;
  }

  #intro figcaption {
    padding: 0.7rem 0.9rem;
    font-size: 0.8rem;
  }

  #faq summary {
    padding: 0.85rem 2.6rem 0.85rem 1rem;
    font-size: 0.925rem;
  }

  #faq summary::after {
    right: 0.8rem;
    width: 24px;
    height: 24px;
  }

  #howto ol li {
    padding-left: 2.9rem;
  }

  header form[role="search"] button {
    padding: 0.5rem 0.9rem;
  }

  header form[role="search"] input[type="search"] {
    width: 110px;
  }

  header form[role="search"] input[type="search"]:focus {
    width: 130px;
  }

  #cases blockquote {
    padding-left: 2.4rem;
  }

  #cases blockquote::before {
    font-size: 2rem;
    left: 0.55rem;
  }

  footer {
    padding: 1.75rem 1rem 1.25rem;
  }
}

@media (max-width: 380px) {
  header form[role="search"] input[type="search"] {
    width: 90px;
  }

  header form[role="search"] input[type="search"]:focus {
    width: 110px;
  }

  header .brand a {
    font-size: 1.2rem;
  }
}

@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 print {
  header,
  nav[aria-label="面包屑导航"],
  footer,
  #sitemap,
  #links {
    display: none;
  }

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

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