:root {
  --primary: #e94560;
  --primary-dark: #c73650;
  --primary-light: #ff6b81;
  --accent: #f5c518;
  --accent-alt: #4ecca3;
  --bg-deep: #1a1a2e;
  --bg-mid: #16213e;
  --bg-soft: #0f3460;
  --bg-page: #f0f2f8;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.75);
  --bg-glass-dark: rgba(26, 26, 46, 0.65);
  --text-main: #1c1c2e;
  --text-sub: #55556b;
  --text-muted: #8a8aa0;
  --text-inverse: #f5f6fa;
  --border-soft: rgba(28, 28, 46, 0.08);
  --border-glass: rgba(255, 255, 255, 0.35);
  --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 18px 48px rgba(26, 26, 46, 0.16);
  --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.3);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-serif: Georgia, "Songti SC", "SimSun", serif;
  --max-width: 1240px;
  --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #0d0d1a;
    --bg-card: #1a1a2e;
    --bg-glass: rgba(26, 26, 46, 0.72);
    --bg-glass-dark: rgba(13, 13, 26, 0.8);
    --text-main: #eef0f8;
    --text-sub: #b4b8cc;
    --text-muted: #7a7e94;
    --border-soft: rgba(255, 255, 255, 0.1);
    --border-glass: rgba(255, 255, 255, 0.15);
    --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 18px 48px rgba(0, 0, 0, 0.5);
  }
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(233, 69, 96, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 88% 92%, rgba(15, 52, 96, 0.1) 0%, transparent 45%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

.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;
}

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-main);
  white-space: nowrap;
  transition: transform var(--transition-bounce);
}

.logo:hover {
  transform: scale(1.04);
  color: var(--text-main);
}

.logo svg {
  filter: drop-shadow(0 2px 6px rgba(233, 69, 96, 0.35));
  transition: transform var(--transition-bounce);
}

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

#site-header nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

#site-header nav a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: 999px;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#site-header nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-smooth);
}

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

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

#site-header form[role="search"] {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  padding: 4px 4px 4px 16px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#site-header form[role="search"]:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

#site-header input[type="search"] {
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.88rem;
  color: var(--text-main);
  width: 170px;
  font-family: inherit;
}

#site-header input[type="search"]::placeholder {
  color: var(--text-muted);
}

#site-header button[type="submit"] {
  border: none;
  cursor: pointer;
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 999px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

#site-header button[type="submit"]:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
  filter: brightness(1.08);
}

#site-header button[type="submit"]:active {
  transform: translateY(0);
}

/* ============ MAIN LAYOUT ============ */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

main > section {
  margin-top: 56px;
  animation: fadeUp 0.8s ease both;
}

main > section:nth-child(odd) {
  animation-delay: 0.05s;
}

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

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

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

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

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(233, 69, 96, 0.4);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(233, 69, 96, 0);
  }
}

section > h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.3px;
  margin-bottom: 24px;
  padding-left: 18px;
  position: relative;
  color: var(--text-main);
  line-height: 1.35;
}

section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.12em;
  bottom: 0.12em;
  width: 6px;
  border-radius: 6px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  box-shadow: 0 0 12px rgba(233, 69, 96, 0.4);
}

section h3 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
  margin: 32px 0 14px;
  color: var(--text-main);
  letter-spacing: -0.2px;
}

section h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 22px 0 10px;
  color: var(--primary);
}

section p {
  color: var(--text-sub);
  margin-bottom: 14px;
  text-align: justify;
}

section ul,
section ol {
  margin: 14px 0 20px;
  padding-left: 0;
}

section ul li,
section ol li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
  color: var(--text-sub);
  line-height: 1.75;
}

section ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 8px rgba(233, 69, 96, 0.35);
}

section ol {
  counter-reset: item;
}

section ol li {
  counter-increment: item;
}

section ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(233, 69, 96, 0.3);
}

section strong {
  color: var(--text-main);
  font-weight: 700;
}

/* ============ HERO ============ */
#hero {
  position: relative;
  margin-top: 40px;
  padding: 56px 40px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  color: var(--text-inverse);
  background:
    linear-gradient(135deg, #1a1a2e 0%, #16213e 35%, #0f3460 70%, #e94560 140%);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  box-shadow: var(--shadow-lg);
}

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

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(245, 197, 24, 0.18) 0%, transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(78, 204, 163, 0.15) 0%, transparent 40%);
  pointer-events: none;
}

#hero > * {
  position: relative;
  z-index: 1;
}

#hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  background: linear-gradient(90deg, #ffffff 0%, #ffd6de 50%, #f5c518 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 6s linear infinite;
  background-size: 200% auto;
}

#hero > p {
  color: rgba(245, 246, 250, 0.88);
  font-size: 1rem;
  line-height: 1.85;
  max-width: 900px;
  margin-bottom: 28px;
  text-align: left;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 32px 0;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-stats > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  padding: 8px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), transform var(--transition-bounce);
}

.hero-stats > div:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.hero-stats strong {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 12px rgba(233, 69, 96, 0.5);
  font-variant-numeric: tabular-nums;
}

.hero-stats span {
  font-size: 0.82rem;
  color: rgba(245, 246, 250, 0.75);
  letter-spacing: 0.5px;
}

.hero-slider {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 30px;
}

.hero-slider figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
  cursor: pointer;
}

.hero-slider figure:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 48px rgba(233, 69, 96, 0.35);
  border-color: rgba(233, 69, 96, 0.5);
}

.hero-slider figure svg {
  width: 100%;
  display: block;
}

.hero-slider figcaption {
  padding: 12px 16px 16px;
  font-size: 0.85rem;
  color: rgba(245, 246, 250, 0.85);
  text-align: center;
  line-height: 1.5;
}

/* ============ BREADCRUMB & ANCHOR NAV ============ */
nav[aria-label="面包屑导航"] {
  margin-top: 28px;
  font-size: 0.85rem;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 12px 18px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

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

nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--text-muted);
  font-weight: 700;
}

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

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

nav[aria-label="页面锚点导航"] {
  margin-top: 20px;
}

nav[aria-label="页面锚点导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 18px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

nav[aria-label="页面锚点导航"] a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-sub);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  transition: all var(--transition-fast);
}

nav[aria-label="页面锚点导航"] a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ============ CONTENT CARDS ============ */
#brand-intro,
#history,
#culture,
#products,
#advantages,
#solutions,
#applications,
#cases,
#reviews,
#news,
#articles,
#knowledge,
#faq,
#howto,
#contact,
#author-info,
#sitemap,
#friend-links {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 36px 34px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth), border-color var(--transition-fast);
}

#brand-intro:hover,
#history:hover,
#culture:hover,
#products:hover,
#advantages:hover,
#solutions:hover,
#applications:hover,
#cases:hover,
#reviews:hover,
#news:hover,
#articles:hover,
#knowledge:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#author-info:hover,
#sitemap:hover,
#friend-links:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.2);
}

/* ============ DEFINITION LISTS ============ */
dl {
  display: grid;
  grid-template-columns: minmax(120px, 180px) 1fr;
  gap: 0;
  margin: 20px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-soft);
}

dt {
  padding: 12px 18px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-main);
  background: linear-gradient(90deg, rgba(233, 69, 96, 0.08), rgba(233, 69, 96, 0.02));
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
}

dd {
  padding: 12px 18px;
  font-size: 0.92rem;
  color: var(--text-sub);
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
}

dt:last-of-type,
dd:last-of-type {
  border-bottom: none;
}

/* ============ NEWS & ARTICLES ============ */
#news article,
#articles article {
  position: relative;
  padding: 22px 24px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.04), rgba(15, 52, 96, 0.04));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
}

#news article::before,
#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  opacity: 0.6;
  transition: opacity var(--transition-fast), top var(--transition-smooth), bottom var(--transition-smooth);
}

#news article:hover,
#articles article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.3);
}

#news article:hover::before,
#articles article:hover::before {
  opacity: 1;
  top: 12px;
  bottom: 12px;
}

#news article h3,
#articles article h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  color: var(--text-main);
  transition: color var(--transition-fast);
}

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

#news time,
#articles time {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  padding: 3px 10px;
  background: var(--bg-page);
  border-radius: 999px;
}

#articles article > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary);
  position: relative;
}

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

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

/* ============ BLOCKQUOTES / REVIEWS ============ */
#reviews blockquote {
  position: relative;
  margin: 20px 0;
  padding: 24px 26px 24px 60px;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.06), rgba(15, 52, 96, 0.05));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

#reviews blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 4rem;
  line-height: 1;
  font-family: var(--font-serif);
  color: var(--primary);
  opacity: 0.35;
}

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

#reviews blockquote p {
  font-size: 0.98rem;
  font-style: italic;
  color: var(--text-sub);
  margin-bottom: 10px;
}

#reviews cite {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  font-style: normal;
  color: var(--primary);
  text-align: right;
}

/* ============ FAQ / DETAILS ============ */
#faq details {
  margin-bottom: 12px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  overflow: hidden;
  transition: box-shadow var(--transition-smooth), border-color var(--transition-fast);
}

#faq details:hover {
  border-color: rgba(233, 69, 96, 0.3);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  box-shadow: var(--shadow-md);
  border-color: rgba(233, 69, 96, 0.4);
}

#faq summary {
  position: relative;
  padding: 18px 52px 18px 22px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  transition: transform var(--transition-bounce), background var(--transition-fast);
}

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

#faq summary:hover {
  background: rgba(233, 69, 96, 0.06);
  color: var(--primary);
}

#faq details p {
  padding: 0 22px 20px;
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.8;
  animation: fadeUp 0.35s ease both;
}

/* ============ HOWTO ============ */
#howto ol {
  counter-reset: item;
  margin-top: 20px;
}

#howto ol > li {
  position: relative;
  padding: 20px 22px 20px 70px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(15, 52, 96, 0.05), rgba(233, 69, 96, 0.04));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

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

#howto ol > li::before {
  content: counter(item);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.35);
  animation: pulseGlow 2.6s ease infinite;
}

#howto ol > li h4 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--text-main);
}

#howto ol > li p {
  margin: 0;
  font-size: 0.92rem;
}

/* ============ CONTACT & AUTHOR ============ */
#contact dl,
#author-info dl {
  margin-top: 18px;
}

#contact ul,
#author-info ul {
  margin-top: 12px;
}

#contact a {
  font-weight: 600;
  word-break: break-all;
}

/* ============ SITEMAP & FRIEND LINKS ============ */
#sitemap ul,
#friend-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

#sitemap li,
#friend-links li {
  padding-left: 0;
  margin-bottom: 0;
}

#sitemap li::before,
#friend-links li::before {
  display: none;
}

#sitemap a,
#friend-links a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-sub);
  background: var(--bg-page);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  transition: all var(--transition-fast);
}

#sitemap a:hover,
#friend-links a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

/* ============ FOOTER ============ */
footer {
  position: relative;
  margin-top: 80px;
  padding: 56px 24px 32px;
  background: linear-gradient(180deg, var(--bg-deep) 0%, #0d0d1a 100%);
  color: rgba(245, 246, 250, 0.78);
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--accent-alt), var(--primary));
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 32px;
  padding: 24px 26px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background var(--transition-smooth), border-color var(--transition-fast), transform var(--transition-smooth);
}

footer > section:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(233, 69, 96, 0.35);
  transform: translateY(-3px);
}

footer h2 {
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  padding-left: 14px;
  position: relative;
}

footer h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

footer p {
  font-size: 0.85rem;
  line-height: 1.85;
  color: rgba(245, 246, 250, 0.7);
  text-align: justify;
}

footer nav[aria-label="底部导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

footer nav[aria-label="底部导航"] ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

footer nav[aria-label="底部导航"] a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.82rem;
  color: rgba(245, 246, 250, 0.65);
  border-radius: 999px;
  transition: all var(--transition-fast);
}

footer nav[aria-label="底部导航"] a:hover {
  color: #fff;
  background: rgba(233, 69, 96, 0.25);
  transform: translateY(-2px);
}

/* ============ SCROLL REVEAL (progressive enhancement) ============ */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    main > section {
      animation: fadeUp 0.8s ease both;
      animation-timeline: view();
      animation-range: entry 0% entry 60%;
    }
  }
}

@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;
  }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .header-inner {
    gap: 16px;
  }

  #site-header nav a {
    padding: 7px 10px;
    font-size: 0.84rem;
  }

  #site-header input[type="search"] {
    width: 130px;
  }

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

@media (max-width: 860px) {
  :root {
    --header-height: auto;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 18px;
    height: auto;
    gap: 12px;
  }

  #site-header nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  #site-header nav::-webkit-scrollbar {
    display: none;
  }

  #site-header nav ul {
    flex-wrap: nowrap;
    padding-bottom: 4px;
  }

  #site-header form[role="search"] {
    order: 2;
    margin-left: auto;
  }

  #site-header input[type="search"] {
    width: 120px;
  }

  main {
    padding: 0 18px 60px;
  }

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

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

  #brand-intro,
  #history,
  #culture,
  #products,
  #advantages,
  #solutions,
  #applications,
  #cases,
  #reviews,
  #news,
  #articles,
  #knowledge,
  #faq,
  #howto,
  #contact,
  #author-info,
  #sitemap,
  #friend-links {
    padding: 26px 20px;
    border-radius: var(--radius-md);
  }

  dl {
    grid-template-columns: 1fr;
  }

  dt {
    border-bottom: none;
    padding-bottom: 4px;
  }

  dd {
    padding-top: 4px;
    margin-bottom: 8px;
  }

  #howto ol > li {
    padding: 18px 18px 18px 62px;
  }

  footer {
    padding: 40px 18px 24px;
  }

  footer > section {
    padding: 20px 18px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .logo {
    font-size: 1.1rem;
  }

  .logo svg {
    width: 34px;
    height: 34px;
  }

  #site-header form[role="search"] {
    padding: 3px 3px 3px 12px;
  }

  #site-header input[type="search"] {
    width: 90px;
    font-size: 0.82rem;
  }

  #site-header button[type="submit"] {
    padding: 7px 14px;
    font-size: 0.8rem;
  }

  #hero {
    padding: 32px 18px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    padding: 16px;
  }

  .hero-stats strong {
    font-size: 1.3rem;
  }

  .hero-stats span {
    font-size: 0.72rem;
  }

  section > h2 {
    font-size: 1.3rem;
    padding-left: 14px;
  }

  section h3 {
    font-size: 1.08rem;
  }

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

  #reviews blockquote::before {
    font-size: 3rem;
    left: 12px;
  }

  #faq summary {
    padding: 15px 46px 15px 16px;
    font-size: 0.92rem;
  }

  #faq summary::after {
    right: 14px;
    width: 22px;
    height: 22px;
    font-size: 1rem;
  }

  #howto ol > li {
    padding: 16px 16px 16px 56px;
  }

  #howto ol > li::before {
    left: 14px;
    top: 16px;
    width: 30px;
    height: 30px;
    font-size: 0.85rem;
  }
}

/* ============ PRINT ============ */
@media print {
  #site-header,
  footer,
  nav[aria-label="页面锚点导航"],
  nav[aria-label="面包屑导航"] {
    display: none;
  }

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

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

  #hero {
    background: #eee;
    color: #000;
  }

  #hero h1 {
    -webkit-text-fill-color: #000;
    color: #000;
  }
}