:root {
  --primary: #1A5F7A;
  --primary-light: #2A8AA8;
  --primary-dark: #0F3D4F;
  --accent: #FF6B6B;
  --accent-light: #FF9A9A;
  --accent-dark: #E04848;
  --bg: #F5F7FA;
  --bg-alt: #FFFFFF;
  --bg-card: rgba(255,255,255,0.75);
  --bg-glass: rgba(255,255,255,0.25);
  --text: #1A2A33;
  --text-secondary: #4A5A66;
  --text-muted: #7A8A96;
  --border: rgba(26,95,122,0.12);
  --shadow-sm: 0 2px 8px rgba(26,95,122,0.08);
  --shadow-md: 0 8px 24px rgba(26,95,122,0.12);
  --shadow-lg: 0 16px 48px rgba(26,95,122,0.16);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --gradient-hero: linear-gradient(135deg, #1A5F7A 0%, #2A8AA8 40%, #6BB5D0 100%);
  --gradient-accent: linear-gradient(135deg, #FF6B6B 0%, #FF9A9A 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(245,247,250,0.8));
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D1B24;
    --bg-alt: #132430;
    --bg-card: rgba(19,36,48,0.8);
    --bg-glass: rgba(19,36,48,0.4);
    --text: #E8EEF2;
    --text-secondary: #A8B8C4;
    --text-muted: #6A7A86;
    --border: rgba(107,181,208,0.15);
    --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 16px 48px rgba(0,0,0,0.5);
    --gradient-hero: linear-gradient(135deg, #0F3D4F 0%, #1A5F7A 40%, #2A8AA8 100%);
    --gradient-card: linear-gradient(145deg, rgba(19,36,48,0.9), rgba(13,27,36,0.8));
  }
}

*, *::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", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

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

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

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

ul, ol {
  list-style: none;
}

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

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

nav[aria-label="主导航"] {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

nav[aria-label="主导航"] > a {
  font-size: 1.35rem;
  font-weight: 800;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  white-space: nowrap;
  flex-shrink: 0;
}

nav[aria-label="主导航"] > a:hover {
  opacity: 0.85;
  -webkit-text-fill-color: transparent;
}

nav[aria-label="主导航"] > ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav[aria-label="主导航"] > ul > li > a {
  display: block;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
  white-space: nowrap;
}

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-accent);
  border-radius: 2px;
  transition: transform var(--transition);
}

nav[aria-label="主导航"] > ul > li > a:hover {
  color: var(--primary-light);
  background: rgba(42,138,168,0.08);
}

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

/* ===== MAIN ===== */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ===== HERO ===== */
#hero {
  position: relative;
  margin: 32px 0 48px;
  padding: 64px 48px;
  background: var(--gradient-hero);
  border-radius: var(--radius-xl);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
  box-shadow: var(--shadow-lg);
}

#hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
  z-index: -1;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,107,107,0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
  z-index: -1;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

#hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
  animation: fadeInUp 0.8s ease-out;
}

#hero p {
  font-size: clamp(0.92rem, 1.8vw, 1.05rem);
  line-height: 1.8;
  opacity: 0.92;
  max-width: 800px;
  margin-bottom: 16px;
  animation: fadeInUp 0.8s ease-out 0.15s both;
}

#hero p:last-of-type {
  margin-bottom: 24px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Breadcrumb */
nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 0.85rem;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

nav[aria-label="面包屑导航"] ol li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.75);
}

nav[aria-label="面包屑导航"] ol li + li::before {
  content: '/';
  color: rgba(255,255,255,0.4);
}

nav[aria-label="面包屑导航"] ol li a {
  color: rgba(255,255,255,0.9);
  text-decoration: underline;
  text-underline-offset: 3px;
}

nav[aria-label="面包屑导航"] ol li a:hover {
  color: #fff;
}

/* ===== SECTIONS ===== */
main > section {
  margin-bottom: 56px;
  animation: fadeInUp 0.7s ease-out both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

@supports not (animation-timeline: view()) {
  main > section {
    animation: none;
    opacity: 1;
  }
}

main > section > h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 24px;
  padding-bottom: 12px;
  position: relative;
  letter-spacing: -0.3px;
}

main > section > h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: width var(--transition-slow);
}

main > section:hover > h2::after {
  width: 96px;
}

main > section > h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  font-weight: 700;
  color: var(--primary-light);
  margin: 28px 0 12px;
  letter-spacing: -0.2px;
}

main > section > h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin: 20px 0 8px;
  padding-left: 14px;
  position: relative;
}

main > section > h4::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(255,107,107,0.2);
}

main > section > p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 12px;
}

/* ===== BRAND SECTION ===== */
#brand {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

#brand:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ===== PRODUCTS SECTION ===== */
#products {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

#products:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

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

#solutions > h3 {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  margin: 0;
  font-size: 1.05rem;
  color: var(--primary-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

#solutions > h3::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}

#solutions > h3:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(42,138,168,0.3);
}

#solutions > h3:hover::before {
  opacity: 1;
}

#solutions > p {
  grid-column: 1 / -1;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  transition: all var(--transition);
}

#solutions > p:hover {
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}

/* ===== APPLICATIONS SECTION ===== */
#applications {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

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

#applications > h3 {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  margin: 0;
  font-size: 1rem;
  color: var(--primary-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 10px;
}

#applications > h3::before {
  content: '◆';
  font-size: 0.7rem;
  color: var(--accent);
  flex-shrink: 0;
}

#applications > h3:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-md);
  border-color: rgba(42,138,168,0.3);
}

#applications > p {
  grid-column: 1 / -1;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  padding: 0 4px;
}

/* ===== CASES SECTION ===== */
#cases {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

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

#cases > h3 {
  padding: 20px 24px;
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-light);
  margin: 16px 0 8px;
  transition: all var(--transition);
}

#cases > h3:hover {
  background: rgba(42,138,168,0.08);
  border-left-color: var(--accent);
  transform: translateX(6px);
}

#cases > p {
  padding: 0 24px 8px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

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

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

#testimonials blockquote {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

#testimonials blockquote::before {
  content: '"';
  position: absolute;
  top: 8px;
  left: 16px;
  font-size: 4rem;
  font-family: Georgia, serif;
  color: rgba(42,138,168,0.15);
  line-height: 1;
  pointer-events: none;
}

#testimonials blockquote:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(42,138,168,0.25);
}

#testimonials blockquote p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  font-style: italic;
}

#testimonials blockquote cite {
  display: block;
  font-size: 0.85rem;
  color: var(--primary-light);
  font-style: normal;
  font-weight: 600;
  text-align: right;
}

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

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

#news article {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

#news article::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

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

#news article:hover::after {
  transform: scaleX(1);
}

#news article h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color var(--transition);
}

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

#news article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding: 2px 10px;
  background: rgba(42,138,168,0.08);
  border-radius: 20px;
}

#news article p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

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

#articles article {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

#articles article::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at top right, rgba(42,138,168,0.08), transparent 70%);
  transition: all var(--transition);
}

#articles article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(42,138,168,0.25);
}

#articles article:hover::before {
  width: 140px;
  height: 140px;
}

#articles article h3 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color var(--transition);
}

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

#articles article time {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

#articles article p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
  flex: 1;
}

#articles article p a {
  display: inline-block;
  margin-top: 10px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--accent);
  position: relative;
  transition: all var(--transition);
}

#articles article p a::after {
  content: ' →';
  transition: transform var(--transition);
  display: inline-block;
}

#articles article p a:hover {
  color: var(--accent-dark);
  letter-spacing: 0.5px;
}

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

/* ===== FAQ SECTION ===== */
#faq {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#faq > h3 {
  padding: 18px 22px;
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-light);
  margin: 14px 0 6px;
  font-size: 0.98rem;
  color: var(--text);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

#faq > h3::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--text-muted);
  transition: all var(--transition);
}

#faq > h3:hover {
  background: rgba(42,138,168,0.08);
  border-left-color: var(--accent);
  transform: translateX(4px);
}

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

#faq > p {
  padding: 8px 22px 16px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.85;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

#faq > p:last-of-type {
  border-bottom: none;
}

/* ===== HOWTO SECTION ===== */
#howto {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#howto > h4 {
  padding: 16px 22px;
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent);
  margin: 14px 0 6px;
  font-size: 0.95rem;
  color: var(--text);
  transition: all var(--transition);
  counter-increment: step;
  position: relative;
}

#howto > h4:hover {
  background: rgba(255,107,107,0.06);
  transform: translateX(4px);
}

#howto > p {
  padding: 6px 22px 14px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

/* ===== CONTACT SECTION ===== */
#contact {
  background: var(--gradient-hero);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

#contact::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

#contact > h2 {
  color: #fff;
}

#contact > h2::after {
  background: rgba(255,255,255,0.8);
}

#contact > h3 {
  color: rgba(255,255,255,0.95);
  margin-top: 24px;
}

#contact > p {
  color: rgba(255,255,255,0.85);
  font-size: 0.92rem;
}

#contact > ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

#contact > ul > li {
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
  transition: all var(--transition);
}

#contact > ul > li:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

/* ===== SITEMAP & LINKS ===== */
#sitemap, #links {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
}

#sitemap > ul, #links > ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap > ul > li > a, #links > ul > li > a {
  display: inline-block;
  padding: 8px 18px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}

#sitemap > ul > li > a:hover, #links > ul > li > a:hover {
  background: var(--primary-light);
  color: #fff;
  border-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(42,138,168,0.3);
}

/* ===== AUTHOR INFO ===== */
#author-info {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
}

#author-info > p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 6px;
}

#author-info > p:last-child {
  margin-bottom: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== FOOTER ===== */
footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 56px 24px 32px;
  margin-top: 40px;
}

footer > section {
  max-width: 1200px;
  margin: 0 auto 28px;
}

footer > section > h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  position: relative;
}

footer > section > h2::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

footer > section > p {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.65);
  margin-bottom: 8px;
}

footer > p:last-child {
  max-width: 1200px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
}

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

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  nav[aria-label="主导航"] {
    padding: 0 20px;
  }

  nav[aria-label="主导航"] > ul > li > a {
    padding: 8px 10px;
    font-size: 0.82rem;
  }

  main {
    padding: 0 20px 64px;
  }

  #hero {
    padding: 48px 32px;
  }

  #brand, #products, #cases, #faq, #howto, #contact, #sitemap, #links, #author-info {
    padding: 32px 28px;
  }
}

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

  nav[aria-label="主导航"] {
    height: auto;
    padding: 12px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  nav[aria-label="主导航"] > a {
    font-size: 1.2rem;
  }

  nav[aria-label="主导航"] > ul {
    width: 100%;
    justify-content: flex-start;
    gap: 2px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
  }

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

  nav[aria-label="主导航"] > ul > li > a {
    padding: 6px 10px;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  main {
    padding: 0 16px 48px;
  }

  #hero {
    padding: 36px 24px;
    margin: 20px 0 36px;
    border-radius: var(--radius-lg);
  }

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

  #hero p {
    font-size: 0.88rem;
  }

  main > section > h2 {
    font-size: 1.25rem;
    margin-bottom: 18px;
  }

  main > section > h3 {
    font-size: 1.05rem;
    margin: 22px 0 10px;
  }

  #brand, #products, #cases, #faq, #howto, #contact, #sitemap, #links, #author-info {
    padding: 24px 20px;
    border-radius: var(--radius-md);
  }

  #solutions, #applications, #testimonials, #news, #articles {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  #solutions > h3, #applications > h3 {
    padding: 20px 18px;
    font-size: 0.95rem;
  }

  #testimonials blockquote {
    padding: 22px 18px;
  }

  #news article, #articles article {
    padding: 22px 18px;
  }

  #faq > h3 {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  #faq > h3::after {
    right: 14px;
  }

  #faq > p {
    padding: 6px 16px 12px;
    font-size: 0.85rem;
  }

  #howto > h4 {
    padding: 12px 16px;
    font-size: 0.88rem;
  }

  #howto > p {
    padding: 4px 16px 10px;
    font-size: 0.85rem;
  }

  #contact {
    padding: 32px 24px;
  }

  #contact > ul {
    flex-direction: column;
  }

  #contact > ul > li {
    width: 100%;
    text-align: center;
  }

  #sitemap > ul, #links > ul {
    gap: 8px;
  }

  #sitemap > ul > li > a, #links > ul > li > a {
    padding: 6px 14px;
    font-size: 0.82rem;
  }

  footer {
    padding: 40px 16px 24px;
  }

  footer > section > h2 {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  nav[aria-label="主导航"] > ul > li > a {
    padding: 5px 8px;
    font-size: 0.72rem;
  }

  #hero {
    padding: 28px 18px;
    border-radius: var(--radius-md);
  }

  #hero h1 {
    font-size: 1.15rem;
  }

  #hero p {
    font-size: 0.82rem;
  }

  main > section > h2 {
    font-size: 1.1rem;
  }

  main > section > h3 {
    font-size: 0.95rem;
  }

  #brand, #products, #cases, #faq, #howto, #contact, #sitemap, #links, #author-info {
    padding: 18px 14px;
  }

  #solutions > h3, #applications > h3 {
    padding: 16px 14px;
    font-size: 0.88rem;
  }

  #testimonials blockquote {
    padding: 18px 14px;
  }

  #testimonials blockquote p {
    font-size: 0.85rem;
  }

  #news article, #articles article {
    padding: 18px 14px;
  }

  #news article h3, #articles article h3 {
    font-size: 0.92rem;
  }

  #faq > h3 {
    padding: 12px 14px;
    font-size: 0.82rem;
  }

  #faq > h3::after {
    right: 12px;
    font-size: 1rem;
  }

  #faq > p {
    padding: 4px 14px 10px;
    font-size: 0.8rem;
  }

  #howto > h4 {
    padding: 10px 14px;
    font-size: 0.82rem;
  }

  #howto > p {
    padding: 2px 14px 8px;
    font-size: 0.8rem;
  }

  #contact {
    padding: 24px 16px;
  }

  footer {
    padding: 32px 12px 20px;
  }
}

/* ===== ACCESSIBILITY ===== */
@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;
  }
}

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

::selection {
  background: rgba(42,138,168,0.25);
  color: var(--text);
}

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

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

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

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

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

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

  main > section {
    break-inside: avoid;
  }
}