:root {
  --primary: #6C5CE7;
  --primary-dark: #5A4BD1;
  --primary-light: #A29BFE;
  --secondary: #FD79A8;
  --secondary-dark: #E84393;
  --accent: #00CEC9;
  --accent-dark: #00B894;
  --bg: #F8F9FD;
  --bg-alt: #FFFFFF;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --text: #1A1A2E;
  --text-secondary: #4A4A6A;
  --text-muted: #8888A8;
  --border: rgba(108, 92, 231, 0.12);
  --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.06);
  --shadow: 0 8px 32px rgba(108, 92, 231, 0.1);
  --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.16);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --radius-full: 999px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --gradient-primary: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 50%, #FD79A8 100%);
  --gradient-hero: linear-gradient(135deg, #6C5CE7 0%, #8B7CF6 25%, #A29BFE 50%, #FD79A8 80%, #FF9FB5 100%);
  --gradient-accent: linear-gradient(135deg, #00CEC9 0%, #6C5CE7 100%);
  --gradient-card: linear-gradient(135deg, rgba(108, 92, 231, 0.06) 0%, rgba(253, 121, 168, 0.06) 100%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F0F1A;
    --bg-alt: #1A1A2E;
    --bg-card: rgba(26, 26, 46, 0.78);
    --bg-glass: rgba(26, 26, 46, 0.6);
    --text: #EAEAF5;
    --text-secondary: #B8B8D4;
    --text-muted: #7A7A9E;
    --border: rgba(162, 155, 254, 0.15);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --gradient-card: linear-gradient(135deg, rgba(108, 92, 231, 0.12) 0%, rgba(253, 121, 168, 0.12) 100%);
  }
}

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

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

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

body::before {
  content: "";
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(108, 92, 231, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(253, 121, 168, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(0, 206, 201, 0.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
  animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(2%, -2%) rotate(1deg); }
  66% { transform: translate(-1%, 1%) rotate(-1deg); }
}

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

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

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

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  transition: color var(--transition);
}

h1 {
  font-size: clamp(1.75rem, 4vw + 0.5rem, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.4rem, 2.5vw + 0.5rem, 2.1rem);
  letter-spacing: -0.01em;
  position: relative;
  padding-bottom: 0.6em;
}

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

h2:hover::after {
  width: 96px;
}

h3 {
  font-size: clamp(1.1rem, 1.5vw + 0.4rem, 1.35rem);
  color: var(--text-secondary);
}

p {
  color: var(--text-secondary);
  transition: color var(--transition);
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

header:hover {
  box-shadow: var(--shadow-sm);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

nav > a:first-child {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  position: relative;
}

nav > a:first-child:hover {
  transform: scale(1.05);
  filter: brightness(1.15);
}

nav > a:first-child::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  transition: width var(--transition);
}

nav > a:first-child:hover::after {
  width: 100%;
}

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

nav ul li a {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

nav ul li a::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: var(--gradient-card);
  opacity: 0;
  transform: scale(0.85);
  transition: all var(--transition-fast);
  z-index: -1;
}

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

nav ul li a:hover::before {
  opacity: 1;
  transform: scale(1);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

section {
  margin-bottom: 3.5rem;
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition), border-color var(--transition);
  animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@supports not (animation-timeline: view()) {
  section {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

section:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

section#top {
  background: var(--gradient-hero);
  background-size: 300% 300%;
  animation: gradientShift 10s ease infinite, fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
  animation-timeline: auto, view();
  animation-range: normal, entry 0% entry 30%;
  border: none;
  color: #fff;
  text-align: center;
  padding: 4rem 2rem;
  position: relative;
  overflow: hidden;
}

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

section#top::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -30%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  pointer-events: none;
  animation: orbFloat 8s ease-in-out infinite;
}

section#top::after {
  content: "";
  position: absolute;
  bottom: -50%;
  left: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
  animation: orbFloat 10s ease-in-out infinite reverse;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-20px, 20px) scale(1.1); }
}

section#top h1 {
  color: #fff;
  margin-bottom: 1.25rem;
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

section#top p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 780px;
  margin: 0 auto 0.75rem;
  position: relative;
  z-index: 1;
  font-size: clamp(0.95rem, 1vw + 0.5rem, 1.1rem);
  line-height: 1.85;
}

section#top p:last-child {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 1rem;
  padding: 0.5rem 1.25rem;
  display: inline-block;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

section#about h3,
section#products h3,
section#solutions h3,
section#cases h3,
section#news h3,
section#faq h3,
section#howto h3,
section#legal h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--primary-light);
  transition: border-color var(--transition), padding-left var(--transition), color var(--transition);
}

section#about h3:hover,
section#products h3:hover,
section#solutions h3:hover,
section#cases h3:hover,
section#news h3:hover,
section#faq h3:hover,
section#howto h3:hover,
section#legal h3:hover {
  border-left-color: var(--secondary);
  padding-left: 1.15rem;
  color: var(--primary);
}

section#about p,
section#products p,
section#solutions p,
section#cases p,
section#news p,
section#faq p,
section#howto p,
section#legal p {
  margin-bottom: 0.5rem;
}

section#articles article {
  padding: 1.5rem;
  margin-bottom: 1rem;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

section#articles article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  opacity: 0;
  transform: scaleY(0);
  transform-origin: top;
  transition: all var(--transition);
}

section#articles article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
  border-color: rgba(108, 92, 231, 0.25);
}

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

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

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

section#articles article p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

section#articles article p:last-child {
  margin-bottom: 0;
  margin-top: 0.75rem;
}

section#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

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

section#articles article a:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.35);
  transform: translateY(-2px);
}

section#articles article a:hover::after {
  transform: translateX(4px);
}

section#faq h3 {
  cursor: pointer;
  position: relative;
  padding: 0.85rem 1rem 0.85rem 2.5rem;
  margin-top: 0.75rem;
  background: var(--gradient-card);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary-light);
  transition: all var(--transition);
}

section#faq h3::before {
  content: "Q";
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #fff;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

section#faq h3:hover {
  background: rgba(108, 92, 231, 0.08);
  border-left-color: var(--secondary);
  transform: translateX(4px);
}

section#faq h3:hover::before {
  transform: translateY(-50%) scale(1.15) rotate(-8deg);
}

section#faq h3 + p {
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px dashed var(--border);
  transition: color var(--transition), padding var(--transition);
}

section#faq h3 + p:hover {
  color: var(--text-secondary);
}

section#howto h3 {
  border-left-color: var(--accent);
}

section#howto h3:hover {
  border-left-color: var(--accent-dark);
  color: var(--accent);
}

section#contact p {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left var(--transition), color var(--transition);
}

section#contact p:hover {
  padding-left: 0.75rem;
  color: var(--primary);
}

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

section#sitemap ul,
section#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.5rem;
}

section#sitemap ul li a,
section#links ul li a {
  display: block;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

section#sitemap ul li a::before,
section#links ul li a::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

section#sitemap ul li a:hover,
section#links ul li a:hover {
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.3);
}

section#sitemap ul li a:hover::before,
section#links ul li a:hover::before {
  opacity: 1;
}

section#updates p {
  display: inline-block;
  margin-right: 1.5rem;
  margin-bottom: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  background: var(--gradient-card);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

section#updates p:hover {
  border-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  text-align: center;
  transition: background var(--transition), border-color var(--transition);
}

footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

footer p:first-child {
  font-weight: 600;
  color: var(--text-secondary);
}

footer a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

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

@media (max-width: 900px) {
  nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
  }

  nav ul {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    gap: 0.15rem;
    padding-bottom: 0.35rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

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

  nav ul li a {
    font-size: 0.8rem;
    padding: 0.35rem 0.7rem;
  }

  main {
    padding: 0 1rem 2rem;
  }

  section {
    padding: 1.75rem 1.25rem;
    margin-bottom: 2rem;
    border-radius: var(--radius);
  }

  section#top {
    padding: 3rem 1.25rem;
  }

  section#sitemap ul,
  section#links ul {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
}

@media (max-width: 520px) {
  html {
    font-size: 15px;
  }

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

  section {
    padding: 1.5rem 1rem;
    border-radius: var(--radius-sm);
  }

  section#top {
    padding: 2.5rem 1rem;
  }

  section#top p:last-child {
    font-size: 0.78rem;
    padding: 0.4rem 0.9rem;
  }

  section#articles article {
    padding: 1.15rem;
  }

  section#sitemap ul,
  section#links ul {
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
  }

  section#sitemap ul li a,
  section#links ul li a {
    padding: 0.5rem 0.75rem;
    font-size: 0.82rem;
  }

  section#updates p {
    display: block;
    margin-right: 0;
    text-align: center;
  }

  footer {
    padding: 2rem 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,
  section#top::before,
  section#top::after {
    display: none;
  }

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

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

::selection {
  background: rgba(108, 92, 231, 0.25);
  color: var(--text);
}

:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
  border-radius: 4px;
}

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

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

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

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