:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #ff6b7a;
  --secondary: #457b9d;
  --accent: #f4a261;
  --bg: #ffffff;
  --bg-alt: #f8f9fc;
  --bg-card: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #555b66;
  --text-light: #8a919e;
  --border: #e8ecf2;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.05);
  --shadow-md: 0 6px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.12);
  --gradient-primary: linear-gradient(135deg, #e63946 0%, #ff6b7a 50%, #f4a261 100%);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #e63946 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,.9), rgba(255,255,255,.6));
  --glass-bg: rgba(255,255,255,.72);
  --glass-border: rgba(255,255,255,.35);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --max-width: 1200px;
  --header-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --bg-alt: #161922;
    --bg-card: #1c2029;
    --text: #f0f2f5;
    --text-secondary: #b0b8c4;
    --text-light: #7a8494;
    --border: #2a2f3a;
    --shadow-sm: 0 2px 8px rgba(0,0,0,.3);
    --shadow-md: 0 6px 24px rgba(0,0,0,.4);
    --shadow-lg: 0 16px 48px rgba(0,0,0,.5);
    --glass-bg: rgba(28,32,41,.78);
    --glass-border: rgba(255,255,255,.08);
    --gradient-card: linear-gradient(145deg, rgba(28,32,41,.9), rgba(28,32,41,.6));
    --gradient-hero: linear-gradient(135deg, #0a0a14 0%, #1a1a2e 40%, #8b1a24 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: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

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

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

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

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

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

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

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

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

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), box-shadow var(--transition);
}

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

nav[aria-label="主导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

nav[aria-label="主导航"] > a {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
  letter-spacing: .02em;
  transition: opacity var(--transition), transform var(--transition);
}

nav[aria-label="主导航"] > a:hover {
  opacity: .85;
  transform: scale(1.03);
}

nav[aria-label="主导航"] ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

nav[aria-label="主导航"] ul li a {
  display: block;
  padding: 8px 14px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

nav[aria-label="主导航"] ul li a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: transform var(--transition);
}

nav[aria-label="主导航"] ul li a:hover {
  color: var(--primary);
  background: rgba(230,57,70,.06);
}

nav[aria-label="主导航"] ul li a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

nav[aria-label="面包屑导航"] {
  padding: 20px 0 8px;
}

nav[aria-label="面包屑导航"] ol {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: var(--text-light);
  flex-wrap: wrap;
}

nav[aria-label="面包屑导航"] ol li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--text-light);
  font-weight: 700;
}

nav[aria-label="面包屑导航"] ol li a {
  color: var(--text-secondary);
  font-weight: 500;
}

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

section {
  margin-bottom: 56px;
  animation: fadeInUp .6s ease both;
  animation-timeline: view();
  animation-range: entry 0% entry 40%;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@supports not (animation-timeline: view()) {
  section {
    animation: fadeInUp .6s ease both;
  }
}

section h2 {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 24px;
  padding-bottom: 12px;
  position: relative;
  color: var(--text);
  letter-spacing: .01em;
}

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

section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 24px 0 10px;
  color: var(--text);
  transition: color var(--transition);
}

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

section p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: .95rem;
  line-height: 1.85;
}

#hero {
  position: relative;
  margin: 24px 0 56px;
  padding: 72px 48px;
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
  box-shadow: var(--shadow-lg);
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 25%, rgba(255,107,122,.35), transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(244,162,97,.3), transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(255,255,255,.06), transparent 60%);
  z-index: -1;
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { opacity: .7; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.08); }
}

#hero h1 {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: .01em;
  text-shadow: 0 4px 24px rgba(0,0,0,.3);
  position: relative;
  z-index: 1;
}

#hero > p {
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(255,255,255,.88);
  max-width: 820px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

#hero figure {
  margin-top: 16px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  z-index: 1;
}

#hero figure:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 28px 72px rgba(0,0,0,.45);
}

#hero figure svg {
  width: 100%;
  height: auto;
  display: block;
}

#hero figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 14px 20px;
  background: linear-gradient(transparent, rgba(0,0,0,.7));
  color: rgba(255,255,255,.92);
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .02em;
}

#brand, #products, #advantages, #solutions, #applications,
#cases, #reviews, #news, #articles, #faq, #howto,
#contact, #sitemap, #links, #legal {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

#brand:hover, #products:hover, #advantages:hover, #solutions:hover,
#applications:hover, #cases:hover, #reviews:hover, #news:hover,
#articles:hover, #faq:hover, #howto:hover, #contact:hover,
#sitemap:hover, #links:hover, #legal:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(230,57,70,.18);
}

#advantages {
  background: linear-gradient(160deg, var(--bg-card) 0%, var(--bg-alt) 100%);
}

#advantages h3 {
  padding-left: 18px;
  position: relative;
}

#advantages h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 20px;
  background: var(--gradient-primary);
  border-radius: 3px;
}

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

#cases article:hover,
#news article:hover,
#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230,57,70,.22);
}

#cases article h3,
#news article h3,
#articles article h3 {
  margin-top: 0;
  font-size: 1.08rem;
  line-height: 1.5;
}

#news article p:first-of-type,
#articles article p:first-of-type {
  font-size: .78rem;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: .03em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

#news article a,
#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  font-weight: 600;
  margin-top: 8px;
  padding: 6px 14px;
  border-radius: 50px;
  background: rgba(230,57,70,.08);
  transition: background var(--transition), transform var(--transition), gap var(--transition);
}

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

#news article a:hover,
#articles article a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateX(4px);
}

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

#reviews blockquote {
  position: relative;
  padding: 24px 28px 24px 56px;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border-left: 4px solid var(--primary);
  transition: transform var(--transition), box-shadow var(--transition);
}

#reviews blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 14px;
  font-size: 3rem;
  line-height: 1;
  color: var(--primary);
  opacity: .35;
  font-family: Georgia, serif;
}

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

#reviews blockquote p {
  margin: 0;
  font-size: .93rem;
  color: var(--text-secondary);
  font-style: italic;
}

#faq h3 {
  padding: 16px 20px;
  margin: 0 0 2px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  cursor: pointer;
  position: relative;
  transition: background var(--transition), color var(--transition);
  border: 1px solid transparent;
}

#faq h3::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition);
}

#faq h3:hover {
  background: rgba(230,57,70,.06);
  color: var(--primary);
  border-color: rgba(230,57,70,.12);
}

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

#faq p {
  padding: 14px 20px 18px;
  margin: 0 0 14px;
  font-size: .9rem;
  border-left: 3px solid var(--border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: border-color var(--transition), background var(--transition);
}

#faq p:hover {
  border-left-color: var(--primary);
  background: rgba(230,57,70,.03);
}

#howto ol {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 16px 0;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 16px 20px 16px 64px;
  margin-bottom: 12px;
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  font-size: .93rem;
  color: var(--text-secondary);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  font-size: .85rem;
  box-shadow: 0 4px 12px rgba(230,57,70,.3);
  transition: transform var(--transition);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(230,57,70,.22);
}

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.12);
}

#contact p {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: .92rem;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
  transition: padding-left var(--transition), border-color var(--transition);
}

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

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

#sitemap ul li a,
#links ul li a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  transition: all var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(230,57,70,.28);
}

#legal h2 {
  font-size: 1.25rem;
  margin-top: 28px;
}

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

footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 48px 24px 36px;
  text-align: center;
  transition: background var(--transition);
}

footer p {
  color: var(--text-secondary);
  font-size: .85rem;
  margin-bottom: 8px;
  line-height: 1.8;
}

footer p:first-child {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

footer p:last-child {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: .78rem;
  color: var(--text-light);
}

@media (max-width: 1024px) {
  nav[aria-label="主导航"] ul {
    gap: 2px;
  }
  nav[aria-label="主导航"] ul li a {
    padding: 8px 10px;
    font-size: .8rem;
  }
  #hero {
    padding: 56px 36px;
  }
  #hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  header {
    position: sticky;
  }

  nav[aria-label="主导航"] {
    padding: 0 16px;
    height: auto;
    min-height: var(--header-height);
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  nav[aria-label="主导航"] > a {
    font-size: 1.15rem;
  }

  nav[aria-label="主导航"] ul {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  nav[aria-label="主导航"] ul::-webkit-scrollbar {
    display: none;
  }

  nav[aria-label="主导航"] ul li a {
    white-space: nowrap;
    padding: 6px 12px;
    font-size: .78rem;
  }

  main {
    padding: 0 16px 60px;
  }

  #hero {
    padding: 40px 24px;
    border-radius: var(--radius-lg);
    margin: 16px 0 40px;
  }

  #hero h1 {
    font-size: 1.55rem;
    margin-bottom: 14px;
  }

  #hero > p {
    font-size: .9rem;
    line-height: 1.8;
    margin-bottom: 24px;
  }

  section {
    margin-bottom: 36px;
  }

  section h2 {
    font-size: 1.3rem;
    margin-bottom: 18px;
  }

  section h3 {
    font-size: 1.05rem;
  }

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

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

  #reviews blockquote {
    padding: 20px 18px 20px 46px;
  }

  #reviews blockquote::before {
    left: 12px;
    font-size: 2.4rem;
  }

  #faq h3 {
    padding: 14px 16px;
    font-size: .93rem;
  }

  #faq h3::after {
    right: 16px;
  }

  #faq p {
    padding: 12px 16px 16px;
    font-size: .86rem;
  }

  #howto ol li {
    padding: 14px 16px 14px 56px;
    font-size: .88rem;
  }

  #howto ol li::before {
    left: 14px;
    width: 28px;
    height: 28px;
    font-size: .78rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 8px;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 9px 10px;
    font-size: .82rem;
  }

  footer {
    padding: 36px 16px 28px;
  }

  footer p {
    font-size: .8rem;
  }
}

@media (max-width: 480px) {
  #hero {
    padding: 32px 18px;
  }

  #hero h1 {
    font-size: 1.35rem;
  }

  #hero > p {
    font-size: .85rem;
  }

  section h2 {
    font-size: 1.15rem;
  }

  #brand, #products, #advantages, #solutions, #applications,
  #cases, #reviews, #news, #articles, #faq, #howto,
  #contact, #sitemap, #links, #legal {
    padding: 20px 14px;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  header, footer, nav[aria-label="面包屑导航"] {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  section {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}