:root {
  --pink-50: #fff5f8;
  --pink-100: #ffe6ef;
  --pink-200: #ffcfe0;
  --pink-300: #ffb3cc;
  --pink-400: #ff8fb1;
  --pink-500: #ff6f9c;
  --pink-600: #f04d82;
  --purple-100: #f3e8ff;
  --purple-200: #e4d0ff;
  --purple-300: #c9a7ff;
  --purple-400: #a97cf5;
  --purple-500: #8b5cf6;
  --blue-100: #e0f2fe;
  --blue-300: #7dd3fc;
  --blue-400: #38bdf8;
  --mint-100: #d1fae5;
  --mint-300: #6ee7b7;
  --peach-100: #ffe4d6;
  --peach-200: #ffcdb8;
  --yellow-100: #fef9c3;
  --text-900: #3d2b3d;
  --text-700: #5c4a5c;
  --text-500: #8a7a8a;
  --text-300: #b8a8b8;
  --bg-base: #fff8fb;
  --bg-soft: #fef0f5;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 255, 255, 0.85);
  --card-shadow: 0 8px 32px rgba(255, 143, 177, 0.16);
  --card-shadow-hover: 0 16px 48px rgba(255, 143, 177, 0.28);
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.75);
  --header-bg: rgba(255, 248, 251, 0.78);
  --gradient-main: linear-gradient(135deg, #ffb3cc 0%, #ff8fb1 30%, #c9a7ff 70%, #a97cf5 100%);
  --gradient-soft: linear-gradient(135deg, #ffe6ef 0%, #f3e8ff 50%, #e0f2fe 100%);
  --gradient-warm: linear-gradient(120deg, #ffcfe0 0%, #ffe4d6 50%, #fef9c3 100%);
  --gradient-cool: linear-gradient(135deg, #e4d0ff 0%, #c9a7ff 50%, #7dd3fc 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: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-900: #f5eef5;
    --text-700: #d9c9d9;
    --text-500: #a895a8;
    --text-300: #7a687a;
    --bg-base: #1a1220;
    --bg-soft: #221628;
    --card-bg: rgba(45, 32, 52, 0.68);
    --card-border: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --card-shadow-hover: 0 16px 48px rgba(169, 124, 245, 0.28);
    --glass-bg: rgba(45, 32, 52, 0.55);
    --glass-border: rgba(255, 255, 255, 0.12);
    --header-bg: rgba(26, 18, 32, 0.82);
    --gradient-main: linear-gradient(135deg, #7a3d5c 0%, #8b5cf6 50%, #5b3d8a 100%);
    --gradient-soft: linear-gradient(135deg, #2d2034 0%, #221628 50%, #1a1220 100%);
    --gradient-warm: linear-gradient(120deg, #4a2d3d 0%, #3d2b3d 50%, #2d2034 100%);
    --gradient-cool: linear-gradient(135deg, #3d2b5c 0%, #5b3d8a 50%, #2d4a5c 100%);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-700);
  background-color: var(--bg-base);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(255, 179, 204, 0.35) 0%, transparent 45%),
    radial-gradient(circle at 85% 10%, rgba(201, 167, 255, 0.28) 0%, transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(125, 211, 252, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 30% 90%, rgba(255, 228, 214, 0.25) 0%, transparent 40%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-color-scheme: dark) {
  body {
    background-image:
      radial-gradient(circle at 15% 20%, rgba(139, 92, 246, 0.18) 0%, transparent 45%),
      radial-gradient(circle at 85% 10%, rgba(255, 143, 177, 0.12) 0%, transparent 40%),
      radial-gradient(circle at 70% 80%, rgba(125, 211, 252, 0.08) 0%, transparent 45%),
      radial-gradient(circle at 30% 90%, rgba(169, 124, 245, 0.1) 0%, transparent 40%);
  }
}

::selection {
  background: var(--pink-300);
  color: #fff;
}

a {
  color: var(--pink-500);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--purple-500);
}

h1, h2, h3, h4 {
  color: var(--text-900);
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  line-height: 1.3;
}

h2 {
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  position: relative;
  padding-left: 20px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: var(--radius-pill);
  background: var(--gradient-main);
  box-shadow: 0 0 12px rgba(255, 143, 177, 0.5);
}

h3 {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  margin-top: 0.4em;
}

p {
  margin-bottom: 0.9em;
  color: var(--text-700);
}

ul, ol {
  padding-left: 1.4em;
  margin-bottom: 1em;
}

li {
  margin-bottom: 0.4em;
  color: var(--text-700);
}

li::marker {
  color: var(--pink-400);
}

blockquote {
  position: relative;
  margin: 1.2em 0;
  padding: 1.2em 1.5em 1.2em 2.2em;
  background: var(--glass-bg);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--glass-border);
  border-left: 4px solid var(--pink-400);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
}

blockquote p {
  margin-bottom: 0.5em;
  font-style: italic;
  color: var(--text-700);
}

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

#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 24px rgba(255, 143, 177, 0.1);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

#site-header nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

#site-header nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px;
  list-style: none;
  padding: 0;
  margin: 0;
}

#site-header nav ul li {
  margin: 0;
}

#site-header nav ul li a {
  display: block;
  padding: 10px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-700);
  border-radius: var(--radius-pill);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

#site-header nav ul li a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--gradient-main);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

#site-header nav ul li a:hover {
  color: var(--pink-500);
  background: rgba(255, 143, 177, 0.12);
  transform: translateY(-2px);
}

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

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 20px 40px;
}

section {
  margin-bottom: 60px;
  animation: fadeInUp 0.8s var(--transition-slow) both;
}

section:nth-child(even) {
  animation-delay: 0.1s;
}

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

@keyframes floatSoft {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

#hero {
  position: relative;
  padding: 60px 40px;
  border-radius: var(--radius-xl);
  background: var(--gradient-main);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite, fadeInUp 0.8s var(--transition-slow) both;
  box-shadow: 0 20px 60px rgba(255, 143, 177, 0.35);
  overflow: hidden;
  color: #fff;
}

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.35) 0%, transparent 70%);
  animation: floatSoft 6s ease-in-out infinite;
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
  animation: floatSoft 8s ease-in-out infinite reverse;
  pointer-events: none;
}

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

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

#hero p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.05rem;
  max-width: 800px;
  position: relative;
  z-index: 1;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.1);
}

#hero p:last-child {
  display: inline-block;
  margin-top: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

#brand,
#products,
#solutions,
#applications,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links,
#legal {
  background: var(--card-bg);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--card-shadow);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

#brand:hover,
#products:hover,
#solutions:hover,
#applications:hover,
#cases:hover,
#news:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#sitemap:hover,
#links:hover,
#legal:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
}

#brand h3,
#products h3,
#solutions h3,
#applications h3,
#cases h3,
#news h3,
#articles h3,
#faq h3,
#howto h3,
#contact h3 {
  margin-top: 1.5em;
  padding-bottom: 8px;
  border-bottom: 2px dashed var(--pink-200);
  color: var(--pink-600);
}

#brand h3:first-of-type,
#products h3:first-of-type,
#solutions h3:first-of-type,
#applications h3:first-of-type,
#cases h3:first-of-type,
#faq h3:first-of-type,
#howto h3:first-of-type,
#contact h3:first-of-type {
  margin-top: 0.5em;
}

@media (prefers-color-scheme: dark) {
  #brand h3,
  #products h3,
  #solutions h3,
  #applications h3,
  #cases h3,
  #news h3,
  #articles h3,
  #faq h3,
  #howto h3,
  #contact h3 {
    border-bottom-color: rgba(255, 143, 177, 0.25);
    color: var(--pink-300);
  }
}

#products ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  list-style: none;
  padding: 0;
  margin-top: 16px;
}

#products ul li {
  padding: 16px 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

#products ul li::before {
  content: "✿";
  margin-right: 8px;
  color: var(--pink-400);
  font-size: 1.1em;
}

#products ul li:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 32px rgba(255, 143, 177, 0.25);
  border-color: var(--pink-300);
}

#cases blockquote {
  margin-top: 24px;
}

#cases blockquote p {
  padding-left: 0;
}

#news article,
#articles article {
  padding: 24px;
  margin-bottom: 18px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

#news article::before,
#articles article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-main);
  opacity: 0;
  transition: opacity var(--transition-base);
}

#news article:hover,
#articles article:hover {
  transform: translateX(6px);
  box-shadow: 0 12px 36px rgba(169, 124, 245, 0.22);
  border-color: var(--purple-200);
}

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

#news article h3,
#articles article h3 {
  border-bottom: none;
  padding-bottom: 0;
  margin-top: 0;
  color: var(--text-900);
  transition: color var(--transition-fast);
}

#news article:hover h3,
#articles article:hover h3 {
  color: var(--pink-500);
}

#news article p:first-of-type,
#articles article p:first-of-type {
  font-size: 0.85rem;
  color: var(--text-500);
  margin-bottom: 10px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: var(--gradient-soft);
  border: 1px solid var(--pink-200);
  transition: all var(--transition-base);
}

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

#articles article a:hover {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(255, 143, 177, 0.4);
  transform: translateY(-2px);
}

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

#faq h3 {
  cursor: default;
  transition: color var(--transition-fast), padding-left var(--transition-base);
}

#faq h3:hover {
  padding-left: 8px;
  color: var(--purple-500);
}

#faq p {
  padding-left: 4px;
  border-left: 2px solid var(--pink-100);
  padding: 0 0 0 16px;
  margin-bottom: 1.2em;
  transition: border-color var(--transition-fast);
}

#faq p:hover {
  border-left-color: var(--pink-400);
}

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

#howto ol li {
  counter-increment: step-counter;
  position: relative;
  padding: 14px 18px 14px 56px;
  margin-bottom: 12px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#howto ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(255, 143, 177, 0.4);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: 0 10px 28px rgba(255, 143, 177, 0.22);
}

#howto ul li {
  padding: 6px 0;
  transition: padding-left var(--transition-fast), color var(--transition-fast);
}

#howto ul li:hover {
  padding-left: 8px;
  color: var(--pink-500);
}

#contact p {
  padding: 8px 0;
  border-bottom: 1px solid var(--pink-100);
  transition: padding-left var(--transition-fast), border-color var(--transition-fast);
}

#contact p:hover {
  padding-left: 8px;
  border-bottom-color: var(--pink-300);
}

@media (prefers-color-scheme: dark) {
  #contact p {
    border-bottom-color: rgba(255, 143, 177, 0.12);
  }
}

#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}

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

#sitemap ul li a,
#links ul li a {
  display: block;
  padding: 12px 18px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-weight: 500;
  text-align: center;
  transition: all var(--transition-base);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  background: var(--gradient-main);
  color: #fff;
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 10px 28px rgba(255, 143, 177, 0.35);
  border-color: transparent;
}

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

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

footer {
  margin-top: 40px;
  padding: 40px 20px;
  text-align: center;
  background: var(--gradient-soft);
  border-top: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
  background-size: 200% 100%;
  animation: shimmer 4s linear infinite;
}

footer p {
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-500);
}

footer p:first-child {
  font-weight: 600;
  color: var(--text-700);
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 70px;
  }

  main {
    padding: 90px 14px 30px;
  }

  #site-header nav ul {
    gap: 2px;
  }

  #site-header nav ul li a {
    padding: 8px 10px;
    font-size: 0.8rem;
  }

  #hero {
    padding: 40px 24px;
    border-radius: var(--radius-lg);
  }

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

  #hero p:last-child {
    font-size: 0.8rem;
    padding: 6px 14px;
  }

  #brand,
  #products,
  #solutions,
  #applications,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links,
  #legal {
    padding: 24px 18px;
    border-radius: var(--radius-md);
  }

  section {
    margin-bottom: 36px;
  }

  h2 {
    padding-left: 16px;
  }

  h2::before {
    width: 4px;
  }

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

  #news article,
  #articles article {
    padding: 18px 16px;
  }

  #howto ol li {
    padding: 12px 14px 12px 48px;
  }

  #howto ol li::before {
    left: 10px;
    width: 26px;
    height: 26px;
    font-size: 0.78rem;
  }

  blockquote {
    padding: 16px 16px 16px 20px;
  }
}

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

  main {
    padding: 80px 10px 24px;
  }

  #site-header nav ul li a {
    padding: 7px 8px;
    font-size: 0.75rem;
  }

  #hero {
    padding: 32px 18px;
  }

  #hero h1 {
    font-size: 1.5rem;
  }

  #brand,
  #products,
  #solutions,
  #applications,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #links,
  #legal {
    padding: 18px 14px;
  }

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

@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 {
  #site-header,
  footer {
    display: none;
  }

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

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