:root {
  --primary: #f56ea1;
  --primary-dark: #e04f8a;
  --primary-light: #ffb3d1;
  --secondary: #7c6cff;
  --secondary-light: #c2b6ff;
  --accent: #e0a458;
  --accent-light: #f7d9a0;
  --bg: #fff7fb;
  --bg-alt: #ffffff;
  --bg-soft: #fdeef5;
  --text: #3a2c38;
  --text-soft: #6b5a66;
  --text-muted: #9a8b95;
  --border: rgba(245, 110, 161, 0.18);
  --card-bg: rgba(255, 255, 255, 0.72);
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.65);
  --shadow-sm: 0 2px 10px rgba(245, 110, 161, 0.1);
  --shadow-md: 0 8px 28px rgba(245, 110, 161, 0.16);
  --shadow-lg: 0 18px 50px rgba(245, 110, 161, 0.22);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --header-h: 72px;
  --transition: 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg: #1a1420;
  --bg-alt: #221a2b;
  --bg-soft: #2a1f33;
  --text: #f3e8f0;
  --text-soft: #cdbccb;
  --text-muted: #9b8a99;
  --border: rgba(245, 110, 161, 0.26);
  --card-bg: rgba(42, 31, 51, 0.72);
  --glass-bg: rgba(34, 26, 43, 0.6);
  --glass-border: rgba(245, 110, 161, 0.22);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 50px rgba(0, 0, 0, 0.55);
}

*,
*::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);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(245, 110, 161, 0.14), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(124, 108, 255, 0.12), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(224, 164, 88, 0.1), transparent 46%),
    var(--bg);
  background-attachment: fixed;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

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

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

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

li {
  margin: 0.35em 0;
}

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

h1 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  margin: 0 0 0.6em;
  background: linear-gradient(120deg, var(--primary-dark), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  margin: 0 0 0.7em;
  padding-bottom: 0.45em;
  position: relative;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

h3 {
  font-size: clamp(1.08rem, 1.9vw, 1.28rem);
  margin: 1.4em 0 0.5em;
  color: var(--primary-dark);
}

p {
  margin: 0 0 1em;
  color: var(--text-soft);
}

time {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-soft);
  padding: 2px 12px;
  border-radius: 999px;
  margin-bottom: 0.6em;
}

blockquote {
  margin: 1em 0;
  padding: 1.1em 1.4em;
  background: var(--glass-bg);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

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

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 24px rgba(245, 110, 161, 0.08);
  transition: background var(--transition), box-shadow var(--transition);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text);
  flex-shrink: 0;
}

.logo svg {
  transition: transform var(--transition);
  filter: drop-shadow(0 4px 10px rgba(245, 110, 161, 0.4));
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

.logo-text {
  background: linear-gradient(120deg, var(--primary-dark), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.04em;
}

#main-nav {
  flex: 1 1 auto;
}

#main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

#main-nav a {
  display: inline-block;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.92rem;
  color: var(--text-soft);
  font-weight: 500;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

#main-nav a:hover,
#main-nav a:focus-visible {
  background: linear-gradient(120deg, rgba(245, 110, 161, 0.16), rgba(124, 108, 255, 0.16));
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.site-search {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.site-search input {
  width: 170px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-alt);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  transition: width var(--transition), border-color var(--transition), box-shadow var(--transition);
}

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

.site-search input:focus {
  outline: none;
  width: 210px;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(245, 110, 161, 0.16);
}

.site-search button {
  padding: 8px 16px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
}

.site-search button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(245, 110, 161, 0.4);
}

#theme-toggle,
#menu-toggle {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-alt);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

#theme-toggle:hover,
#menu-toggle:hover {
  transform: rotate(12deg) scale(1.08);
  box-shadow: var(--shadow-sm);
}

#menu-toggle {
  display: none;
}

main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  margin: 0 0 56px;
  padding: 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

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

.hero {
  position: relative;
  margin-top: 28px;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.hero-slider {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.slide {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
  background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
}

.slide:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.slide svg {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.slide:hover svg {
  transform: scale(1.05);
}

.slide-text {
  position: absolute;
  inset: auto 0 0 0;
  padding: 22px 24px;
  background: linear-gradient(to top, rgba(30, 12, 24, 0.78), rgba(30, 12, 24, 0));
  color: #fff;
}

.slide-text h2 {
  color: #fff;
  margin: 0 0 0.4em;
  font-size: 1.15rem;
  padding: 0;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.slide-text h2::after {
  display: none;
}

.slide-text p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.88rem;
  line-height: 1.6;
}

.hero-intro {
  padding: 36px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(245, 110, 161, 0.16), rgba(124, 108, 255, 0.14)),
    var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow: var(--shadow-md);
}

.hero-intro p {
  font-size: 1rem;
  max-width: 900px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 20px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.stat:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.stat-num {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
  background: linear-gradient(120deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.84rem;
  color: var(--text-muted);
  text-align: center;
}

#breadcrumb {
  margin: 0 0 20px;
  font-size: 0.88rem;
}

#breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
  color: var(--text-muted);
}

#breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-muted);
}

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

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

#anchor-nav {
  margin: 0 0 32px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow-x: auto;
  scrollbar-width: thin;
}

#anchor-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
}

#anchor-nav a {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.86rem;
  color: var(--text-soft);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  white-space: nowrap;
  transition: all var(--transition);
}

#anchor-nav a:hover {
  background: linear-gradient(120deg, var(--primary), var(--secondary));
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(245, 110, 161, 0.3);
}

#products h3,
#advantages h3,
#solutions h3,
#applications h3,
#cases h3,
#knowledge h3 {
  padding-left: 14px;
  border-left: 4px solid var(--primary);
}

#news article,
#articles article {
  padding: 22px 24px;
  margin: 0 0 18px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

#news article h3,
#articles article h3 {
  margin-top: 0;
  padding-left: 0;
  border-left: none;
}

#articles article a {
  display: inline-block;
  margin-top: 4px;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 18px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--primary), var(--secondary));
  color: #fff;
  transition: transform var(--transition), box-shadow var(--transition);
}

#articles article a:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(245, 110, 161, 0.4);
}

#faq details {
  margin: 0 0 12px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

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

#faq summary {
  cursor: pointer;
  padding: 16px 22px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: background var(--transition), color var(--transition);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition);
}

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

#faq summary:hover {
  background: linear-gradient(120deg, rgba(245, 110, 161, 0.1), rgba(124, 108, 255, 0.1));
  color: var(--primary-dark);
}

#faq details p {
  margin: 0;
  padding: 0 22px 18px;
  color: var(--text-soft);
}

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

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 12px 16px 12px 56px;
  margin: 0 0 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

#contact ul,
#sitemap ul,
#links ul,
#meta-info ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 10px;
}

#contact li,
#sitemap li,
#links li,
#meta-info li {
  margin: 0;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text-soft);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact li:hover,
#sitemap li:hover,
#links li:hover,
#meta-info li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}

#links a,
#sitemap a {
  font-weight: 600;
}

#legal h3 {
  color: var(--secondary);
}

#site-footer {
  margin-top: 20px;
  padding: 48px 20px 40px;
  background:
    linear-gradient(135deg, rgba(245, 110, 161, 0.12), rgba(124, 108, 255, 0.12)),
    var(--bg-alt);
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1240px;
  margin: 0 auto;
  text-align: center;
}

.footer-inner p {
  margin: 0 0 8px;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.footer-inner p:first-child {
  font-weight: 700;
  color: var(--text);
  font-size: 1rem;
  background: linear-gradient(120deg, var(--primary-dark), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-inner p:last-child {
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(245, 110, 161, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.9);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), box-shadow var(--transition);
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 16px 36px rgba(245, 110, 161, 0.55);
}

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1080px) {
  .header-inner {
    gap: 12px;
  }
  #main-nav a {
    padding: 6px 10px;
    font-size: 0.86rem;
  }
  .site-search input {
    width: 140px;
  }
  .site-search input:focus {
    width: 170px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 64px;
  }

  #menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  #main-nav {
    order: 10;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  #main-nav.open {
    max-height: 520px;
  }

  #main-nav ul {
    flex-direction: column;
    gap: 2px;
    padding: 10px 0;
  }

  #main-nav a {
    display: block;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
  }

  .site-search {
    order: 11;
    flex-basis: 100%;
    padding-bottom: 12px;
  }

  .site-search input {
    flex: 1;
    width: auto;
  }

  .site-search input:focus {
    width: auto;
  }

  .hero-slider {
    grid-template-columns: 1fr;
  }

  section {
    padding: 24px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 40px;
  }

  .hero-intro {
    padding: 26px 22px;
  }
}

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

  .header-inner {
    padding: 0 14px;
  }

  main {
    padding: 0 14px;
  }

  .logo-text {
    font-size: 1.05rem;
  }

  .hero {
    margin-top: 18px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat {
    padding: 16px 8px;
  }

  section {
    padding: 20px 16px;
    border-radius: var(--radius-sm);
  }

  h2::after {
    width: 48px;
  }

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

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

  #faq summary {
    padding: 14px 16px;
    padding-right: 44px;
    font-size: 0.95rem;
  }

  #faq summary::after {
    right: 16px;
  }

  #faq details p {
    padding: 0 16px 16px;
    font-size: 0.92rem;
  }

  #howto ol li {
    padding: 12px 12px 12px 50px;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }

  .slide-text {
    padding: 16px;
  }

  .slide-text h2 {
    font-size: 1rem;
  }

  .slide-text p {
    font-size: 0.82rem;
  }
}

@media (max-width: 380px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .site-search button {
    padding: 8px 12px;
  }
}

@media print {
  #site-header,
  #back-to-top,
  #anchor-nav,
  #breadcrumb {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}