:root {
  --primary: #e94560;
  --primary-dark: #c73650;
  --primary-light: #ff6b81;
  --secondary: #0f3460;
  --accent: #533483;
  --bg: #f0f2f5;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.25);
  --bg-glass-border: rgba(255, 255, 255, 0.35);
  --text: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #7a7a9a;
  --border: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.14);
  --shadow-glow: 0 0 24px rgba(233, 69, 96, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d1a;
    --bg-alt: #151528;
    --bg-card: rgba(30, 30, 55, 0.72);
    --bg-glass: rgba(30, 30, 55, 0.35);
    --bg-glass-border: rgba(255, 255, 255, 0.08);
    --text: #eaeaf0;
    --text-secondary: #b0b0cc;
    --text-muted: #7a7a9a;
    --border: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 24px rgba(233, 69, 96, 0.35);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(233, 69, 96, 0.08), transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 20%, rgba(83, 52, 131, 0.08), transparent 60%),
    radial-gradient(ellipse 70% 60% at 50% 100%, rgba(15, 52, 96, 0.06), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

main {
  position: relative;
  z-index: 1;
}

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-light);
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.75rem;
}

h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  margin-bottom: 0.6rem;
}

h4 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

p {
  margin-bottom: 0.9rem;
  color: var(--text-secondary);
}

/* ============ HEADER ============ */
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(--bg-glass-border);
  transition: background var(--transition), box-shadow var(--transition);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

header nav > div:first-child a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

header nav > div:first-child a svg {
  border-radius: 10px;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

header nav > div:first-child a:hover svg {
  transform: rotate(-6deg) scale(1.05);
  box-shadow: 0 0 32px rgba(233, 69, 96, 0.45);
}

header nav > ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

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

header nav > ul li a {
  display: block;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: all var(--transition);
  position: relative;
}

header nav > ul li a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
  transition: width var(--transition), left var(--transition);
}

header nav > ul li a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.08);
}

header nav > ul li a:hover::after {
  width: 60%;
  left: 20%;
}

header nav > div:last-child {
  display: flex;
  align-items: center;
  gap: 8px;
}

header nav form {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 4px;
  transition: all var(--transition);
}

header nav form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

header nav form input {
  border: none;
  background: transparent;
  padding: 8px 14px;
  font-size: 0.88rem;
  color: var(--text);
  width: 180px;
  outline: none;
  font-family: var(--font);
}

header nav form input::placeholder {
  color: var(--text-muted);
}

header nav form button {
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: all var(--transition);
  white-space: nowrap;
}

header nav form button:hover {
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.4);
}

header nav > div:last-child > button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

header nav > div:last-child > button:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: rotate(15deg);
}

/* ============ BREADCRUMB ============ */
main > nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 20px 0;
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  flex-wrap: wrap;
}

main > nav[aria-label="面包屑导航"] ol li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

main > nav[aria-label="面包屑导航"] ol li:not(:last-child)::after {
  content: "/";
  color: var(--text-muted);
  opacity: 0.5;
}

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

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

main > nav[aria-label="面包屑导航"] ol li[aria-current="page"] {
  color: var(--primary);
  font-weight: 600;
}

/* ============ SECTIONS ============ */
main > section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 20px;
}

main > section:nth-child(even) {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  margin-top: 16px;
  margin-bottom: 16px;
  max-width: calc(var(--max-width) + 40px);
  padding-left: 40px;
  padding-right: 40px;
}

/* ============ HERO BANNER ============ */
#home {
  text-align: center;
  padding-top: 56px;
  padding-bottom: 56px;
  position: relative;
}

#home::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(233, 69, 96, 0.06), rgba(83, 52, 131, 0.06), rgba(15, 52, 96, 0.06));
  border-radius: var(--radius-xl);
  z-index: -1;
}

#home h1 {
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text) 20%, var(--primary) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#home > p {
  max-width: 720px;
  margin: 0 auto 2.5rem;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

#home > div {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

#home > div article {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

#home > div article::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(26, 26, 46, 0.4));
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
}

#home > div article:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

#home > div article:hover::after {
  opacity: 1;
}

#home > div article svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ============ ABOUT ============ */
#about article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

#about article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#about article h3 {
  color: var(--primary);
}

/* ============ PRODUCTS ============ */
#products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

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

#products article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#products article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

#products article:hover::before {
  transform: scaleX(1);
}

#products article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.2);
}

#products article h4 {
  margin-top: 1rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
}

/* ============ SOLUTIONS ============ */
#solutions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

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

#solutions article {
  background: linear-gradient(135deg, var(--bg-card), rgba(233, 69, 96, 0.04));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

#solutions article:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(83, 52, 131, 0.15);
}

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

@media (prefers-color-scheme: dark) {
  #solutions article h3 {
    color: var(--primary-light);
  }
}

/* ============ APPLICATIONS ============ */
#applications {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

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

#applications article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border-left: 4px solid var(--primary);
}

#applications article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--accent);
}

/* ============ CASES ============ */
#cases article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

#cases article::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -60px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.08), transparent 70%);
  transform: translateY(-50%);
  transition: transform var(--transition), opacity var(--transition);
  opacity: 0;
}

#cases article:hover::after {
  opacity: 1;
  transform: translateY(-50%) scale(1.5);
}

#cases article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ============ TESTIMONIALS ============ */
#testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

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

#testimonials blockquote {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

#testimonials blockquote::before {
  content: "\201C";
  position: absolute;
  top: 8px;
  left: 16px;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.2;
  font-family: Georgia, serif;
}

#testimonials blockquote:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

#testimonials blockquote p {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

#testimonials blockquote footer {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  text-align: right;
}

/* ============ NEWS ============ */
#news article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

#news article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 2px 0 0 2px;
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

#news article:hover::before {
  transform: scaleY(1);
}

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

#news article time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  background: rgba(233, 69, 96, 0.08);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
}

/* ============ ARTICLES ============ */
#articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

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

#articles article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}

#articles article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.25);
}

#articles article time {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

#articles article p {
  flex: 1;
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary);
  transition: gap var(--transition), color var(--transition);
}

#articles article a::after {
  content: "\2192";
  transition: transform var(--transition);
}

#articles article a:hover {
  gap: 10px;
  color: var(--primary-light);
}

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

/* ============ FAQ ============ */
#faq details {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

#faq details[open] {
  border-color: rgba(233, 69, 96, 0.25);
  box-shadow: var(--shadow-md);
}

#faq details summary {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text);
  transition: color var(--transition), background var(--transition);
  list-style: none;
  position: relative;
}

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

#faq details summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--primary);
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(233, 69, 96, 0.08);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: rotate(180deg);
  background: var(--primary);
  color: #fff;
}

#faq details summary:hover {
  background: rgba(233, 69, 96, 0.04);
  color: var(--primary);
}

#faq details p {
  padding: 0 24px 20px;
  font-size: 0.93rem;
  color: var(--text-secondary);
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ HOWTO ============ */
#howto article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

#howto article h3 {
  color: var(--primary);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  padding-left: 14px;
  border-left: 3px solid var(--primary);
}

#howto article h3:first-child {
  margin-top: 0;
}

#howto article ol {
  counter-reset: step;
  padding-left: 0;
}

#howto article ol li {
  counter-increment: step;
  position: relative;
  padding: 12px 0 12px 52px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

#howto article ol li:last-child {
  border-bottom: none;
}

#howto article ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(233, 69, 96, 0.3);
}

/* ============ CONTACT ============ */
#contact address {
  font-style: normal;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

#contact address p {
  margin-bottom: 0;
  padding: 10px 16px;
  background: rgba(233, 69, 96, 0.04);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  transition: background var(--transition), transform var(--transition);
}

#contact address p:hover {
  background: rgba(233, 69, 96, 0.1);
  transform: translateX(4px);
}

#contact article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

#contact article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ============ SITEMAP ============ */
#sitemap ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

#sitemap ul li a {
  display: block;
  padding: 12px 16px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-align: center;
  transition: all var(--transition);
}

#sitemap ul li a:hover {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.3);
}

/* ============ LINKS ============ */
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

#links ul li a {
  display: inline-block;
  padding: 10px 20px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}

#links ul li a:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ============ FOOTER ============ */
footer {
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
  border-top: 1px solid var(--border);
  padding: 48px 20px 32px;
  margin-top: 48px;
  position: relative;
  z-index: 1;
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

footer > section h2 {
  font-size: 1rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.5rem;
}

footer > section h2::after {
  width: 36px;
  height: 3px;
}

footer > section p {
  font-size: 0.88rem;
  margin-bottom: 0;
  color: var(--text-muted);
}

footer > p {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

footer > p small {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ============ SCROLL ANIMATIONS ============ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

main > section {
  animation: fadeInUp 0.7s ease both;
}

main > section:nth-child(2) { animation-delay: 0.05s; }
main > section:nth-child(3) { animation-delay: 0.1s; }
main > section:nth-child(4) { animation-delay: 0.15s; }
main > section:nth-child(5) { animation-delay: 0.2s; }
main > section:nth-child(6) { animation-delay: 0.25s; }
main > section:nth-child(7) { animation-delay: 0.3s; }
main > section:nth-child(8) { animation-delay: 0.35s; }
main > section:nth-child(9) { animation-delay: 0.4s; }
main > section:nth-child(10) { animation-delay: 0.45s; }
main > section:nth-child(11) { animation-delay: 0.5s; }
main > section:nth-child(12) { animation-delay: 0.55s; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  header nav > ul li a {
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  header nav form input {
    width: 140px;
  }

  #home > div {
    grid-template-columns: repeat(2, 1fr);
  }

  #home > div article:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  header nav {
    padding: 0 14px;
    gap: 10px;
  }

  header nav > ul {
    display: none;
  }

  header nav form {
    display: none;
  }

  header nav > div:last-child > button[aria-label="打开移动菜单"] {
    display: flex;
  }

  header nav > div:last-child > button[aria-label="切换暗黑模式"] {
    display: flex;
  }

  main > section {
    padding: 32px 14px;
  }

  main > section:nth-child(even) {
    max-width: 100%;
    border-radius: var(--radius-md);
    padding-left: 18px;
    padding-right: 18px;
    margin-top: 8px;
    margin-bottom: 8px;
  }

  #home > div {
    grid-template-columns: 1fr;
  }

  #home > div article:last-child {
    grid-column: auto;
  }

  #products,
  #solutions,
  #applications,
  #articles,
  #testimonials {
    grid-template-columns: 1fr;
  }

  #contact address {
    grid-template-columns: 1fr;
  }

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

  footer {
    padding: 32px 14px 24px;
  }

  footer > section {
    padding: 16px 18px;
  }

  h2::after {
    width: 40px;
    height: 3px;
  }
}

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

  header nav > div:first-child a span {
    font-size: 1rem;
  }

  header nav > div:first-child a svg {
    width: 32px;
    height: 32px;
  }

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

  #home > p {
    font-size: 0.92rem;
  }

  #faq details summary {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  #faq details p {
    padding: 0 16px 16px;
    font-size: 0.88rem;
  }

  #howto article {
    padding: 20px 16px;
  }

  #howto article ol li {
    padding-left: 44px;
    font-size: 0.88rem;
  }

  #howto article ol li::before {
    width: 28px;
    height: 28px;
    font-size: 0.78rem;
  }

  #sitemap ul {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  #sitemap ul li a {
    padding: 10px 12px;
    font-size: 0.82rem;
  }

  #links ul {
    flex-direction: column;
  }

  #links ul li a {
    text-align: center;
  }
}

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 4px;
}

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

/* ============ SELECTION ============ */
::selection {
  background: rgba(233, 69, 96, 0.25);
  color: var(--text);
}

/* ============ FOCUS ============ */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ============ PRINT ============ */
@media print {
  header,
  footer,
  #links,
  button,
  form {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

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

  a {
    color: #000;
    text-decoration: underline;
  }
}