:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(30, 30, 50, 0.65);
  --bg-card-hover: rgba(40, 40, 65, 0.8);
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b85;
  --accent: #e94560;
  --accent-secondary: #7b2ff7;
  --accent-tertiary: #00d9ff;
  --gradient-banner: linear-gradient(135deg, #1a1a2e 0%, #16213e 30%, #0f3460 60%, #e94560 100%);
  --gradient-accent: linear-gradient(135deg, #e94560, #7b2ff7);
  --gradient-card: linear-gradient(145deg, rgba(123, 47, 247, 0.08), rgba(233, 69, 96, 0.05));
  --border-color: rgba(255, 255, 255, 0.08);
  --glass-bg: rgba(26, 26, 46, 0.55);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-blur: 20px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 30px rgba(233, 69, 96, 0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --max-width: 1200px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f5f5fa;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-card-hover: rgba(255, 255, 255, 0.9);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8888a0;
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(0, 0, 0, 0.08);
    --gradient-banner: linear-gradient(135deg, #f5f5fa 0%, #e8e8f0 30%, #d0d0e8 60%, #e94560 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(233, 69, 96, 0.08);
  }
}

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

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

@media (min-width: 1400px) {
  html { font-size: 18px; }
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(123, 47, 247, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 100%, rgba(233, 69, 96, 0.06) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

::selection {
  background: var(--accent);
  color: #fff;
}

::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--accent-secondary);
  border-radius: 4px;
}

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

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

a:hover {
  color: var(--accent);
  opacity: 0.9;
}

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

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1.2rem;
}

h2 {
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  margin-bottom: 1.2rem;
  position: relative;
  padding-left: 1rem;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 4px;
  border-radius: 2px;
  background: var(--gradient-accent);
}

h3 {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

ul, ol {
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding-left: 1.4rem;
}

li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

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

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

header nav > a {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

header nav > a:hover {
  opacity: 1;
  filter: brightness(1.2);
}

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

header nav ul li {
  margin: 0;
}

header nav ul li a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

header nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 1px;
  transition: transform var(--transition-normal);
}

header nav ul li a:hover {
  color: var(--text-primary);
  background: rgba(233, 69, 96, 0.1);
}

header nav ul li a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  position: relative;
  z-index: 1;
}

section {
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
  animation: fadeInUp 0.7s ease both;
}

section:hover {
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

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

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(233, 69, 96, 0.1); }
  50% { box-shadow: 0 0 40px rgba(233, 69, 96, 0.25); }
}

#home {
  background: var(--gradient-banner);
  border: none;
  position: relative;
  overflow: hidden;
  padding: 3.5rem 2.5rem;
  margin-top: 1.5rem;
  animation: fadeInUp 0.8s ease both;
}

#home::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: pulseGlow 4s ease-in-out infinite;
}

#home::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(123, 47, 247, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#home h1 {
  position: relative;
  z-index: 1;
  -webkit-text-fill-color: transparent;
  background: linear-gradient(135deg, #fff 0%, #e94560 50%, #7b2ff7 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

#home p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.8);
  max-width: 820px;
  font-size: 1rem;
  line-height: 1.9;
}

@media (prefers-color-scheme: light) {
  #home p {
    color: var(--text-secondary);
  }
  #home h1 {
    background: linear-gradient(135deg, #1a1a2e 0%, #e94560 50%, #7b2ff7 100%);
    -webkit-background-clip: text;
    background-clip: text;
  }
}

#breadcrumb,
nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0.75rem auto 0;
  padding: 0 1.5rem;
}

nav[aria-label="面包屑导航"] ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 0;
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

nav[aria-label="面包屑导航"] ol li:not(:last-child)::after {
  content: '›';
  color: var(--text-muted);
  font-size: 1rem;
}

nav[aria-label="面包屑导航"] ol li a {
  color: var(--text-secondary);
  font-size: 0.82rem;
}

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

#products h3,
#solutions h3,
#cases h3,
#howto h3 {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-top: 1.2rem;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

#products h3:hover,
#solutions h3:hover,
#cases h3:hover,
#howto h3:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#products h3:first-of-type,
#solutions h3:first-of-type,
#cases h3:first-of-type,
#howto h3:first-of-type {
  margin-top: 0.5rem;
}

#news ul {
  list-style: none;
  padding: 0;
}

#news ul li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.6rem;
  margin-bottom: 0.3rem;
  border-bottom: 1px dashed var(--border-color);
  transition: padding-left var(--transition-fast), color var(--transition-fast);
}

#news ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  transition: transform var(--transition-fast);
}

#news ul li:hover {
  padding-left: 2rem;
  color: var(--text-primary);
}

#news ul li:hover::before {
  transform: translateY(-50%) scale(1.4);
}

#news ul li:last-child {
  border-bottom: none;
}

#articles article {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.6rem;
  margin-bottom: 1rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

#articles article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--gradient-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-normal);
}

#articles article:hover {
  transform: translateY(-4px) translateX(4px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  border-color: rgba(233, 69, 96, 0.25);
}

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

#articles article h3 {
  margin-bottom: 0.4rem;
  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: 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

#articles article p:first-of-type::before {
  content: '📅';
  font-size: 0.75rem;
}

#articles article p {
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(233, 69, 96, 0.3);
  transition: all var(--transition-fast);
}

#articles article a::after {
  content: '→';
  transition: transform var(--transition-fast);
}

#articles article a:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  opacity: 1;
}

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

#faq h3 {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 1rem 1.2rem;
  margin-bottom: 0;
  margin-top: 0.75rem;
  cursor: pointer;
  position: relative;
  padding-right: 2.8rem;
  transition: all var(--transition-fast);
  font-size: 1rem;
}

#faq h3::after {
  content: '+';
  position: absolute;
  right: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--accent);
  transition: transform var(--transition-normal);
  line-height: 1;
}

#faq h3:hover {
  background: var(--bg-card-hover);
  border-color: rgba(233, 69, 96, 0.3);
}

#faq h3:hover::after {
  transform: translateY(-50%) rotate(90deg);
}

#faq h3 + p {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 1rem 1.2rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  transition: background var(--transition-fast);
}

#faq h3 + p:hover {
  background: var(--bg-card-hover);
}

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

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 0.85rem 1rem 0.85rem 3.2rem;
  margin-bottom: 0.6rem;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#howto ol li:hover {
  transform: translateX(6px);
  border-color: rgba(233, 69, 96, 0.3);
  box-shadow: var(--shadow-sm);
}

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.15);
  box-shadow: 0 0 12px rgba(233, 69, 96, 0.4);
}

#contact p {
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), padding-left var(--transition-fast);
  border-left: 2px solid transparent;
}

#contact p:hover {
  background: rgba(233, 69, 96, 0.06);
  border-left-color: var(--accent);
  padding-left: 1.1rem;
}

#contact p:first-child {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

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

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  opacity: 1;
}

#legal h2 {
  margin-top: 1.5rem;
}

#legal h2:first-child {
  margin-top: 0;
}

#legal p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-muted);
}

#meta p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

#meta p:last-child {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

footer {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--glass-border);
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

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

footer a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 0 0.3rem;
  transition: color var(--transition-fast);
}

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

#knowledge p {
  position: relative;
  padding-left: 1.2rem;
}

#knowledge p::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-tertiary);
}

#cases p {
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  background: rgba(123, 47, 247, 0.04);
  border-left: 2px solid var(--accent-secondary);
  margin-bottom: 0.6rem;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

#cases p:hover {
  background: rgba(123, 47, 247, 0.08);
  border-left-color: var(--accent);
}

@media (max-width: 900px) {
  header nav {
    padding: 0.65rem 1rem;
  }

  header nav ul {
    gap: 0.15rem;
  }

  header nav ul li a {
    padding: 0.35rem 0.6rem;
    font-size: 0.78rem;
  }

  main {
    padding: 0 1rem 2rem;
  }

  section {
    padding: 1.4rem;
    margin: 1rem 0;
    border-radius: var(--radius-md);
  }

  #home {
    padding: 2.2rem 1.4rem;
  }

  #home h1 {
    font-size: clamp(1.4rem, 5vw, 2rem);
  }

  #home p {
    font-size: 0.9rem;
  }

  #articles article {
    padding: 1.1rem 1.2rem;
  }

  nav[aria-label="面包屑导航"] {
    padding: 0 1rem;
  }
}

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

  header nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  header nav > a {
    font-size: 1.1rem;
  }

  header nav ul {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.3rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

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

  header nav ul li a {
    white-space: nowrap;
    font-size: 0.75rem;
  }

  main {
    padding: 0 0.75rem 1.5rem;
  }

  section {
    padding: 1.1rem;
    margin: 0.75rem 0;
    border-radius: var(--radius-sm);
  }

  #home {
    padding: 1.6rem 1.1rem;
    border-radius: var(--radius-md);
  }

  h2 {
    padding-left: 0.75rem;
    margin-bottom: 0.9rem;
  }

  h2::before {
    width: 3px;
  }

  #articles article {
    padding: 1rem;
  }

  #articles article a {
    font-size: 0.8rem;
    padding: 0.3rem 0.7rem;
  }

  #faq h3 {
    padding: 0.8rem 2.4rem 0.8rem 1rem;
    font-size: 0.92rem;
  }

  #faq h3 + p {
    padding: 0.8rem 1rem;
    font-size: 0.85rem;
  }

  #howto ol li {
    padding: 0.7rem 0.8rem 0.7rem 2.8rem;
    font-size: 0.88rem;
  }

  #howto ol li::before {
    left: 0.7rem;
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.72rem;
  }

  #sitemap ul,
  #links ul {
    gap: 0.4rem;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
  }

  footer {
    padding: 1.4rem 1rem;
  }
}

@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,
  footer,
  #home::before,
  #home::after {
    display: none;
  }

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

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

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