:root {
  --color-primary: #e88aa0;
  --color-primary-dark: #d16b84;
  --color-primary-light: #f5b8c6;
  --color-accent: #f7c9a8;
  --color-accent-2: #b8d8c9;
  --color-bg: #fdf8f7;
  --color-bg-alt: #f7eef0;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.65);
  --color-text: #3d2c33;
  --color-text-soft: #6b5560;
  --color-text-muted: #8f7a83;
  --color-border: rgba(232, 138, 160, 0.22);
  --color-shadow: rgba(209, 107, 132, 0.14);
  --gradient-hero: linear-gradient(135deg, #f9d7e0 0%, #fbe3d4 45%, #d9ece1 100%);
  --gradient-btn: linear-gradient(135deg, #e88aa0 0%, #f0a48f 100%);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --container: 1180px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #f0a0b4;
    --color-primary-dark: #e88aa0;
    --color-primary-light: #f7c0cd;
    --color-accent: #e8b896;
    --color-accent-2: #9fc4b3;
    --color-bg: #1a1418;
    --color-bg-alt: #221a1f;
    --color-surface: #2a2026;
    --color-surface-glass: rgba(42, 32, 38, 0.6);
    --color-text: #f3e8ec;
    --color-text-soft: #d4c2c9;
    --color-text-muted: #a9929b;
    --color-border: rgba(240, 160, 180, 0.22);
    --color-shadow: rgba(0, 0, 0, 0.4);
    --gradient-hero: linear-gradient(135deg, #3a2530 0%, #382a26 45%, #24322c 100%);
    --gradient-btn: linear-gradient(135deg, #e88aa0 0%, #d98f7c 100%);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle at 12% 8%, rgba(232, 138, 160, 0.08), transparent 42%),
    radial-gradient(circle at 88% 22%, rgba(184, 216, 201, 0.1), transparent 40%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

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

h1, h2, h3, h4 {
  line-height: 1.35;
  color: var(--color-text);
  margin: 0 0 0.6em;
  font-weight: 700;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(1.7rem, 4.2vw, 2.9rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.4rem); }

p { margin: 0 0 1em; }

ul, ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
}

li { margin-bottom: 0.5em; }

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

body > a[href="#main-content"] {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  padding: 10px 20px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition);
}

body > a[href="#main-content"]:focus {
  top: 16px;
  color: #fff;
}

header[role="banner"] {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px clamp(16px, 4vw, 40px);
  background: var(--color-surface-glass);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: 0 8px 30px -12px var(--color-shadow);
}

header[role="banner"] > div {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

header[role="banner"] strong {
  font-size: 1.15rem;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-primary-dark);
  letter-spacing: 0.02em;
}

header[role="banner"] span {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

header[role="banner"] nav {
  flex: 1 1 auto;
}

header[role="banner"] nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  justify-content: flex-end;
}

header[role="banner"] nav li {
  margin: 0;
}

header[role="banner"] nav a {
  display: inline-block;
  padding: 7px 14px;
  font-size: 0.9rem;
  color: var(--color-text-soft);
  border-radius: 999px;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

header[role="banner"] nav a:hover,
header[role="banner"] nav a:focus-visible {
  background: rgba(232, 138, 160, 0.14);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
}

main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 40px) 60px;
}

main > nav[aria-label="面包屑导航"] {
  margin: 22px 0 8px;
  font-size: 0.85rem;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

main > nav[aria-label="面包屑导航"] li {
  margin: 0;
  color: var(--color-text-muted);
}

main > nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--color-border);
}

section {
  margin: 0 0 28px;
  padding: clamp(22px, 4vw, 40px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 14px 40px -22px var(--color-shadow);
  animation: fadeUp 0.7s ease both;
}

section > h2 {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 22px;
}

section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: 999px;
  background: var(--gradient-btn);
}

section h3 {
  margin-top: 1.6em;
  color: var(--color-primary-dark);
}

section h3:first-of-type { margin-top: 0.4em; }

#hero {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 6vw, 64px);
  background: var(--gradient-hero);
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 60px -28px var(--color-shadow);
}

#hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.55), transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.4), transparent 70%);
  pointer-events: none;
}

#hero h1 {
  position: relative;
  z-index: 1;
  max-width: 20em;
  color: var(--color-text);
}

#hero p {
  position: relative;
  z-index: 1;
  max-width: 62ch;
  color: var(--color-text-soft);
  font-size: 1.02rem;
}

#hero > div {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

#hero > div a {
  display: inline-block;
  padding: 13px 28px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 999px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

#hero > div a:first-child {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 12px 26px -10px rgba(232, 138, 160, 0.7);
}

#hero > div a:first-child:hover,
#hero > div a:first-child:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 18px 34px -12px rgba(232, 138, 160, 0.8);
  color: #fff;
}

#hero > div a:last-child {
  background: var(--color-surface-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border);
}

#hero > div a:last-child:hover,
#hero > div a:last-child:focus-visible {
  transform: translateY(-3px);
  background: var(--color-surface);
  color: var(--color-primary-dark);
}

#about ul,
#contact ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 10px;
}

#about ul li,
#contact ul li {
  position: relative;
  padding: 12px 16px 12px 44px;
  margin: 0;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

#about ul li::before,
#contact ul li::before {
  content: "✿";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-primary);
  font-size: 1rem;
}

#about ul li:hover,
#contact ul li:hover {
  transform: translateX(4px);
  box-shadow: 0 8px 20px -12px var(--color-shadow);
}

#products ul,
#applications ul,
#news ul,
#howto ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 12px;
}

#products ul li,
#applications ul li,
#news ul li,
#howto ul li {
  position: relative;
  margin: 0;
  padding: 14px 18px 14px 46px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

#products ul li::before,
#applications ul li::before,
#news ul li::before,
#howto ul li::before {
  content: "◆";
  position: absolute;
  left: 18px;
  top: 14px;
  color: var(--color-primary);
  font-size: 0.7rem;
}

#products ul li:hover,
#applications ul li:hover,
#news ul li:hover,
#howto ul li:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px -18px var(--color-shadow);
  background: var(--color-surface);
}

#news ul li time {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  background: rgba(232, 138, 160, 0.12);
  border-radius: 999px;
}

#articles {
  display: grid;
  gap: 20px;
}

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

#articles > article {
  padding: 22px 24px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  animation: fadeUp 0.7s ease both;
}

#articles > article:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 44px -24px var(--color-shadow);
  border-color: var(--color-primary-light);
}

#articles > article h3 {
  margin-top: 0;
  font-size: 1.12rem;
}

#articles > article > p:first-of-type {
  margin-bottom: 0.6em;
}

#articles > article time {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

#articles > article > a {
  display: inline-block;
  margin-top: 6px;
  padding: 8px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

#articles > article > a:hover,
#articles > article > a:focus-visible {
  background: var(--gradient-btn);
  color: #fff;
  border-color: transparent;
  transform: translateX(4px);
}

#cases blockquote {
  position: relative;
  margin: 0 0 16px;
  padding: 20px 24px 20px 56px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
  color: var(--color-text-soft);
  font-style: normal;
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 3rem;
  line-height: 1;
  color: var(--color-primary-light);
  font-family: Georgia, serif;
}

#cases blockquote:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px -20px var(--color-shadow);
}

#cases blockquote p {
  margin: 0;
  font-size: 0.95rem;
}

#faq h3 {
  padding: 14px 18px;
  margin: 18px 0 10px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-size: 1.02rem;
  color: var(--color-text);
  border-left: 3px solid var(--color-primary);
  transition: background var(--transition), color var(--transition);
}

#faq h3:hover {
  background: rgba(232, 138, 160, 0.1);
  color: var(--color-primary-dark);
}

#faq p {
  padding-left: 18px;
  color: var(--color-text-soft);
}

#howto ol {
  counter-reset: step;
  list-style: none;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: stepcounter;
}

#howto ol li {
  position: relative;
  margin: 0;
  padding: 16px 18px 16px 60px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  counter-increment: stepcounter;
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li::before {
  content: counter(stepcounter);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-btn);
  border-radius: 50%;
}

#howto ol li:hover {
  transform: translateX(4px);
  box-shadow: 0 12px 26px -18px var(--color-shadow);
}

#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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

#sitemap ul a,
#links ul a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.88rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: background var(--transition), color var(--transition), transform var(--transition), border-color var(--transition);
}

#sitemap ul a:hover,
#links ul a:hover,
#sitemap ul a:focus-visible,
#links ul a:focus-visible {
  background: var(--gradient-btn);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}

footer[role="contentinfo"] {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 48px) clamp(16px, 4vw, 40px);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

footer[role="contentinfo"] section {
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  animation: none;
}

footer[role="contentinfo"] h2 {
  font-size: 1rem;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-primary-dark);
}

footer[role="contentinfo"] h2::after {
  display: none;
}

footer[role="contentinfo"] p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@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 (min-width: 760px) {
  #articles {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  #articles {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  header[role="banner"] {
    flex-direction: column;
    align-items: flex-start;
  }

  header[role="banner"] nav {
    width: 100%;
  }

  header[role="banner"] nav ul {
    justify-content: flex-start;
  }
}

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

  header[role="banner"] {
    position: relative;
    border-radius: 0;
    padding: 12px 16px;
  }

  header[role="banner"] nav ul {
    gap: 2px;
  }

  header[role="banner"] nav a {
    padding: 6px 10px;
    font-size: 0.82rem;
  }

  main {
    padding: 0 14px 40px;
  }

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

  #hero {
    padding: 28px 20px;
    border-radius: var(--radius-lg);
  }

  #hero > div {
    flex-direction: column;
    gap: 10px;
  }

  #hero > div a {
    text-align: center;
    width: 100%;
  }

  #articles > article {
    padding: 18px;
  }

  #howto ol li {
    padding: 14px 14px 14px 52px;
  }

  #howto ol li::before {
    left: 12px;
    width: 26px;
    height: 26px;
  }

  footer[role="contentinfo"] {
    grid-template-columns: 1fr;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
}