:root {
  --bg-primary: #050b1a;
  --bg-secondary: #0a1a3a;
  --bg-tertiary: #0f2550;
  --bg-card: rgba(16, 32, 68, 0.55);
  --bg-card-hover: rgba(24, 48, 96, 0.7);
  --bg-glass: rgba(14, 28, 60, 0.45);
  --border-color: rgba(90, 150, 255, 0.18);
  --border-hover: rgba(120, 180, 255, 0.45);
  --text-primary: #eaf2ff;
  --text-secondary: #a8bcdc;
  --text-muted: #6d84a8;
  --accent: #4da3ff;
  --accent-2: #7b5cff;
  --accent-3: #00d4ff;
  --accent-glow: rgba(77, 163, 255, 0.35);
  --gradient-hero: linear-gradient(135deg, #050b1a 0%, #0a1a3a 35%, #142a5e 65%, #1e3a7a 100%);
  --gradient-accent: linear-gradient(135deg, #4da3ff 0%, #7b5cff 50%, #00d4ff 100%);
  --gradient-card: linear-gradient(160deg, rgba(30, 58, 122, 0.5) 0%, rgba(10, 26, 58, 0.35) 100%);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 40px rgba(77, 163, 255, 0.15);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --max-width: 1200px;
  --header-height: 72px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #eef4ff;
    --bg-secondary: #e3ecfb;
    --bg-tertiary: #d8e5fa;
    --bg-card: rgba(255, 255, 255, 0.65);
    --bg-card-hover: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.55);
    --border-color: rgba(60, 120, 220, 0.15);
    --border-hover: rgba(60, 120, 220, 0.4);
    --text-primary: #0a1a3a;
    --text-secondary: #3a4f75;
    --text-muted: #6b7fa3;
    --accent: #1e6fdb;
    --accent-2: #5a3fd6;
    --accent-3: #0090c0;
    --accent-glow: rgba(30, 111, 219, 0.2);
    --gradient-hero: linear-gradient(135deg, #dce8fb 0%, #c8daf8 35%, #b0c8f0 65%, #9ab8e8 100%);
    --gradient-accent: linear-gradient(135deg, #1e6fdb 0%, #5a3fd6 50%, #0090c0 100%);
    --gradient-card: linear-gradient(160deg, rgba(255, 255, 255, 0.8) 0%, rgba(230, 240, 255, 0.5) 100%);
    --shadow-card: 0 8px 32px rgba(30, 60, 120, 0.1);
    --shadow-glow: 0 0 40px rgba(30, 111, 219, 0.08);
  }
}

*,
*::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);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition), color var(--transition);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%, rgba(77, 163, 255, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 70% 50% at 85% 15%, rgba(123, 92, 255, 0.1) 0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 50% 100%, rgba(0, 212, 255, 0.06) 0%, transparent 60%),
    var(--bg-primary);
  transition: background var(--transition);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255, 255, 255, 0.5) 50%, transparent 100%),
    radial-gradient(1px 1px at 30% 60%, rgba(255, 255, 255, 0.35) 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 55% 15%, rgba(255, 255, 255, 0.45) 50%, transparent 100%),
    radial-gradient(1px 1px at 75% 45%, rgba(255, 255, 255, 0.3) 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 90% 75%, rgba(255, 255, 255, 0.4) 50%, transparent 100%),
    radial-gradient(1px 1px at 45% 85%, rgba(255, 255, 255, 0.3) 50%, transparent 100%),
    radial-gradient(1px 1px at 65% 35%, rgba(255, 255, 255, 0.25) 50%, transparent 100%),
    radial-gradient(1px 1px at 20% 90%, rgba(255, 255, 255, 0.3) 50%, transparent 100%);
  background-size: 100% 100%;
  opacity: 0.6;
  animation: twinkle 8s ease-in-out infinite alternate;
}

@media (prefers-color-scheme: light) {
  body::after {
    opacity: 0.15;
  }
}

@keyframes twinkle {
  0% { opacity: 0.4; }
  100% { opacity: 0.8; }
}

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

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

a:hover {
  color: var(--accent-3);
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  position: relative;
  padding-bottom: 0.6em;
  margin-bottom: 0.8em;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: 2px;
  background: var(--gradient-accent);
  box-shadow: 0 0 16px var(--accent-glow);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-primary);
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}

h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 1em;
  margin-right: 0.55em;
  vertical-align: -0.12em;
  border-radius: 2px;
  background: var(--gradient-accent);
}

p {
  margin-bottom: 1em;
  color: var(--text-secondary);
}

section p {
  max-width: 900px;
}

section {
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 4vw, 2rem);
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}

section > h2 {
  margin-top: 0;
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition), border-color var(--transition);
}

header > div {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

header > div > a {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  transition: filter var(--transition);
}

header > div > a:hover {
  filter: brightness(1.2) drop-shadow(0 0 12px var(--accent-glow));
}

header nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

header nav ul {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

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

header nav ul li a {
  display: block;
  padding: 0.45em 0.7em;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition), background var(--transition);
}

header nav ul li a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  border-radius: 1px;
  background: var(--gradient-accent);
  transform: translateX(-50%);
  transition: width var(--transition);
}

header nav ul li a:hover {
  color: var(--text-primary);
  background: rgba(77, 163, 255, 0.1);
}

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

#hero {
  position: relative;
  max-width: 100%;
  padding: clamp(3.5rem, 9vw, 7rem) clamp(1rem, 4vw, 2rem) clamp(3rem, 7vw, 5.5rem);
  text-align: center;
  overflow: hidden;
  background: var(--gradient-hero);
  border-bottom: 1px solid var(--border-color);
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 120%, rgba(77, 163, 255, 0.25) 0%, transparent 55%),
    radial-gradient(circle at 15% 20%, rgba(123, 92, 255, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 85% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 45%);
  pointer-events: none;
  animation: heroPulse 10s ease-in-out infinite alternate;
}

@keyframes heroPulse {
  0% { opacity: 0.7; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.08); }
}

#hero::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(600px, 90vw);
  height: min(600px, 90vw);
  border-radius: 50%;
  border: 1px solid rgba(77, 163, 255, 0.12);
  transform: translate(-50%, -50%);
  box-shadow:
    0 0 0 60px rgba(77, 163, 255, 0.03),
    0 0 0 120px rgba(77, 163, 255, 0.02),
    inset 0 0 120px rgba(77, 163, 255, 0.06);
  pointer-events: none;
  animation: domeRotate 30s linear infinite;
}

@keyframes domeRotate {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

#hero h1 {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto 1rem;
  animation: fadeUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

#hero p {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  font-size: clamp(0.95rem, 1.6vw, 1.08rem);
  color: var(--text-secondary);
  animation: fadeUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

#hero p:last-child {
  animation-delay: 0.3s;
  color: var(--text-muted);
}

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

nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem clamp(1rem, 4vw, 2rem) 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] ol li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

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

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

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

#brand,
#products,
#solutions,
#applications,
#cases,
#news,
#knowledge,
#faq,
#howto,
#contact,
#sitemap {
  position: relative;
}

#brand h3,
#products h3,
#solutions h3,
#applications h3,
#cases h3,
#news h3,
#knowledge h3,
#faq h3,
#howto h3,
#contact h3,
#sitemap h3 {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

#brand > p,
#products > p,
#solutions > p,
#applications > p,
#cases > p,
#news > p {
  margin-bottom: 1.5em;
}

#products h3,
#solutions h3,
#applications h3 {
  padding: 1.4rem 1.6rem 0.2rem;
  margin-top: 1.2rem;
  margin-bottom: 0;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--transition), background var(--transition);
}

#products h3 + p,
#solutions h3 + p,
#applications h3 + p {
  margin-top: 0;
  padding: 0.4rem 1.6rem 1.4rem;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  margin-bottom: 1rem;
}

#products h3:hover,
#solutions h3:hover,
#applications h3:hover {
  border-color: var(--border-hover);
}

#products h3:hover + p,
#solutions h3:hover + p,
#applications h3:hover + p {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

#products h3::before,
#solutions h3::before,
#applications h3::before {
  display: none;
}

#products h3,
#solutions h3,
#applications h3 {
  position: relative;
  padding-left: 2.4rem;
}

#products h3::after,
#solutions h3::after,
#applications h3::after {
  content: "";
  position: absolute;
  left: 1.4rem;
  top: 1.75rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

#cases h3 {
  padding: 1.4rem 1.6rem 0.2rem;
  margin-top: 1.2rem;
  margin-bottom: 0;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

#cases h3 + p {
  margin-top: 0;
  padding: 0.4rem 1.6rem 1.4rem;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  margin-bottom: 1rem;
}

#cases h3:last-of-type {
  margin-bottom: 0;
}

#cases h3:last-of-type + p {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

#cases p:not(h3 + p) {
  padding: 0 0.5rem;
  font-style: italic;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin-left: 0.5rem;
}

#news {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 1.5rem;
  align-items: start;
}

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

#news article {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.5rem;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#news article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

#news article:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  background: var(--bg-card-hover);
}

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

#news article h3 {
  margin-top: 0;
  font-size: 1.15rem;
  padding-left: 0;
}

#news article h3::before {
  display: none;
}

#news article p {
  font-size: 0.9rem;
  margin-bottom: 0.8em;
}

#news article p:nth-of-type(1) {
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
}

#news article p:nth-of-type(2) {
  flex: 1;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

#news article a {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.45em 1.1em;
  border-radius: 999px;
  background: rgba(77, 163, 255, 0.12);
  border: 1px solid var(--border-color);
  transition: background var(--transition), border-color var(--transition), transform var(--transition), color var(--transition);
}

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

#news article a:hover {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #fff;
  transform: translateX(2px);
}

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

#knowledge article,
#knowledge > article {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem clamp(1.2rem, 3vw, 2.2rem);
  margin-bottom: 1.5rem;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

#knowledge article::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

#knowledge article:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  transform: translateY(-3px);
}

#knowledge article:hover::after {
  opacity: 1;
}

#knowledge article h3 {
  margin-top: 0;
  margin-bottom: 0.4em;
}

#knowledge article p:nth-of-type(1) {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-bottom: 1em;
  padding-bottom: 0.8em;
  border-bottom: 1px dashed var(--border-color);
}

#knowledge article p:last-child {
  margin-bottom: 0;
}

#faq h3 {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.4rem;
  margin-top: 0.9rem;
  margin-bottom: 0;
  font-size: 1.05rem;
  cursor: default;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--transition), background var(--transition), border-radius var(--transition);
  position: relative;
  padding-right: 3rem;
}

#faq h3::before {
  display: none;
}

#faq h3::after {
  content: "?";
  position: absolute;
  right: 1.4rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.6rem;
  height: 1.6rem;
  line-height: 1.6rem;
  text-align: center;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(77, 163, 255, 0.12);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

#faq h3 + p {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 0 1.4rem 1.2rem;
  margin-top: 0;
  margin-bottom: 0;
  font-size: 0.94rem;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--transition), background var(--transition);
}

#faq h3:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

#faq h3:hover::after {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
  transform: translateY(-50%) rotate(180deg);
}

#faq h3:hover + p {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

#howto {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
  margin-top: 2rem;
  margin-bottom: 2rem;
  max-width: calc(var(--max-width) - 2rem);
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1.2rem, 4vw, 2.8rem);
}

#howto h2::after {
  background: var(--gradient-accent);
}

#howto h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

#howto h3::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--gradient-accent);
  box-shadow: 0 0 14px var(--accent-glow);
  margin-right: 0;
  vertical-align: middle;
}

#howto h3:nth-of-type(3)::before {
  content: "1";
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  width: 28px;
  height: 28px;
}

#howto h3:nth-of-type(2)::before {
  background: linear-gradient(135deg, #4da3ff, #00d4ff);
}

#howto h3:nth-of-type(4)::before {
  background: linear-gradient(135deg, #7b5cff, #4da3ff);
}

#howto h3:nth-of-type(5)::before {
  background: linear-gradient(135deg, #ff6b9d, #7b5cff);
}

#howto h3:nth-of-type(6)::before {
  background: linear-gradient(135deg, #00d4ff, #4da3ff);
}

#howto h3:nth-of-type(7)::before {
  background: linear-gradient(135deg, #4da3ff, #7b5cff);
}

#howto h3:nth-of-type(8)::before {
  background: linear-gradient(135deg, #7b5cff, #00d4ff);
}

#howto p {
  padding-left: 2.6rem;
}

#contact {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  max-width: calc(var(--max-width) - 2rem);
  margin-top: 2rem;
  margin-bottom: 2rem;
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1.2rem, 4vw, 2.8rem);
}

#contact ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

#contact ul li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 1rem 1.2rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--text-secondary);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

#contact ul li::before {
  content: "◆";
  color: var(--accent);
  font-size: 0.7rem;
  line-height: 1.9;
  flex-shrink: 0;
}

#contact ul li:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

#contact ul li a {
  word-break: break-all;
}

#sitemap {
  border-top: 1px solid var(--border-color);
  margin-top: 2rem;
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

#sitemap > ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

#sitemap > ul li a {
  display: inline-block;
  padding: 0.4em 1em;
  font-size: 0.85rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition);
}

#sitemap > ul li a:hover {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

#sitemap h3 {
  margin-top: 1.8rem;
}

#sitemap h3 + ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

#sitemap h3 + ul li a {
  display: inline-block;
  padding: 0.35em 0.9em;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  transition: all var(--transition);
}

#sitemap h3 + ul li a:hover {
  color: var(--accent);
  border-color: var(--border-hover);
}

#sitemap h3 + p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.85;
  max-width: 100%;
}

#sitemap > p:last-of-type {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--border-color);
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

footer {
  position: relative;
  margin-top: 2rem;
  padding: clamp(2rem, 4vw, 3rem) clamp(1rem, 4vw, 2rem);
  text-align: center;
  background: var(--bg-glass);
  border-top: 1px solid var(--border-color);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

footer p {
  margin: 0.3em 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 100%;
}

footer p:first-child {
  color: var(--text-secondary);
  font-weight: 500;
}

footer p:last-child {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-weight: 600;
  letter-spacing: 0.02em;
}

@media (max-width: 1024px) {
  header nav ul li a {
    padding: 0.4em 0.55em;
    font-size: 0.82rem;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 64px;
  }

  header > div {
    flex-wrap: wrap;
    gap: 0;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    height: auto;
    min-height: var(--header-height);
  }

  header {
    height: auto;
  }

  header > div > a {
    font-size: 1.15rem;
  }

  header nav {
    width: 100%;
    justify-content: flex-start;
    margin-top: 0.3rem;
  }

  header nav ul {
    width: 100%;
    gap: 0.1rem;
    padding-bottom: 0.2rem;
    -webkit-overflow-scrolling: touch;
  }

  header nav ul li a {
    padding: 0.4em 0.65em;
    font-size: 0.82rem;
  }

  html {
    scroll-padding-top: calc(var(--header-height) + 50px);
  }

  #hero::after {
    box-shadow:
      0 0 0 40px rgba(77, 163, 255, 0.03),
      0 0 0 80px rgba(77, 163, 255, 0.02),
      inset 0 0 80px rgba(77, 163, 255, 0.06);
  }

  #news {
    grid-template-columns: 1fr;
  }

  #howto,
  #contact {
    border-radius: var(--radius-lg);
    max-width: 100%;
    margin-left: 0.5rem;
    margin-right: 0.5rem;
  }

  #howto p {
    padding-left: 0;
  }

  #howto h3 {
    margin-top: 1.4em;
  }
}

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

  section {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  h2::after {
    width: 48px;
    height: 3px;
  }

  #products h3,
  #solutions h3,
  #applications h3,
  #cases h3 {
    padding-left: 2rem;
    padding-right: 1.1rem;
    font-size: 1.02rem;
  }

  #products h3 + p,
  #solutions h3 + p,
  #applications h3 + p,
  #cases h3 + p {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  #products h3::after,
  #solutions h3::after,
  #applications h3::after {
    left: 1.1rem;
  }

  #faq h3 {
    padding: 1rem 2.8rem 1rem 1.1rem;
    font-size: 0.98rem;
  }

  #faq h3::after {
    right: 1rem;
  }

  #faq h3 + p {
    padding: 0 1.1rem 1rem;
  }

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

  #contact ul li {
    padding: 0.85rem 1rem;
    font-size: 0.86rem;
  }

  #knowledge article {
    padding: 1.3rem 1.1rem;
  }

  #news article {
    padding: 1.3rem 1.1rem;
  }

  #sitemap > ul li a {
    font-size: 0.8rem;
    padding: 0.35em 0.85em;
  }

  footer p {
    font-size: 0.78rem;
  }
}

@media (hover: none) {
  #news article:hover,
  #knowledge article:hover,
  #contact ul li:hover,
  #sitemap > ul li a:hover {
    transform: none;
  }
}

@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;
  }

  #hero::after,
  body::after,
  #hero::before {
    animation: none !important;
  }
}

@media print {
  header,
  footer,
  #hero::before,
  #hero::after,
  body::before,
  body::after {
    display: none !important;
  }

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

  section {
    padding: 1rem 0;
  }

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