:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(30, 30, 50, 0.65);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --bg-glass-hover: rgba(255, 255, 255, 0.12);
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6c6c80;
  --accent-1: #ff6b9d;
  --accent-2: #a855f7;
  --accent-3: #06b6d4;
  --accent-4: #f59e0b;
  --gradient-banner: linear-gradient(135deg, #1a1a2e 0%, #16213e 30%, #0f3460 60%, #533483 100%);
  --gradient-accent: linear-gradient(135deg, #ff6b9d, #a855f7, #06b6d4);
  --gradient-card: linear-gradient(145deg, rgba(255,107,157,0.08), rgba(168,85,247,0.06), rgba(6,182,212,0.04));
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(168, 85, 247, 0.4);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(168, 85, 247, 0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --blur-glass: 16px;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f5f5fa;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.75);
    --bg-glass: rgba(255, 255, 255, 0.5);
    --bg-glass-hover: rgba(255, 255, 255, 0.75);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a68;
    --text-muted: #8888a0;
    --gradient-banner: linear-gradient(135deg, #fce4ec 0%, #e8eaf6 30%, #e0f7fa 60%, #f3e5f5 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,107,157,0.06), rgba(168,85,247,0.04), rgba(6,182,212,0.03));
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(168, 85, 247, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 30px rgba(168, 85, 247, 0.08);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition-smooth), color var(--transition-smooth);
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(255, 107, 157, 0.08), transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(168, 85, 247, 0.06), transparent 60%),
    radial-gradient(ellipse 70% 50% at 50% 100%, rgba(6, 182, 212, 0.05), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

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

::selection {
  background: rgba(168, 85, 247, 0.35);
  color: #fff;
}

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-2), var(--accent-3));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--accent-1), var(--accent-2));
}

/* ========== HEADER ========== */
header {
  position: relative;
  padding: 100px 40px 80px;
  text-align: center;
  background: var(--gradient-banner);
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 30% 40%, rgba(255, 107, 157, 0.15), transparent 40%),
    radial-gradient(circle at 70% 60%, rgba(168, 85, 247, 0.12), transparent 40%),
    radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.1), transparent 40%);
  animation: headerFloat 12s ease-in-out infinite;
  pointer-events: none;
}

@keyframes headerFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(2%, -2%) rotate(1deg); }
  66% { transform: translate(-1%, 1%) rotate(-1deg); }
}

header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg-primary), transparent);
  pointer-events: none;
}

header h1 {
  position: relative;
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 0%, #ff6b9d 30%, #a855f7 60%, #06b6d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 0.8s ease-out both;
  filter: drop-shadow(0 2px 12px rgba(168, 85, 247, 0.3));
}

@media (prefers-color-scheme: light) {
  header h1 {
    background: linear-gradient(135deg, #1a1a2e 0%, #d63384 30%, #7c3aed 60%, #0891b2 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

header p {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.8;
  animation: fadeInUp 0.8s ease-out 0.15s both;
}

@media (prefers-color-scheme: dark) {
  header p {
    color: rgba(255, 255, 255, 0.75);
  }
}

/* ========== NAV ========== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 26, 0.72);
  backdrop-filter: blur(var(--blur-glass)) saturate(1.8);
  -webkit-backdrop-filter: blur(var(--blur-glass)) saturate(1.8);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-smooth);
}

@media (prefers-color-scheme: light) {
  nav {
    background: rgba(245, 245, 250, 0.78);
  }
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
  list-style: none;
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 20px;
}

nav ul li a {
  display: block;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

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

nav ul li a:hover {
  color: var(--text-primary);
  background: var(--bg-glass-hover);
  transform: translateY(-1px);
}

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

/* ========== MAIN ========== */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ========== SECTIONS ========== */
section {
  margin-top: 64px;
  animation: fadeInUp 0.7s ease-out both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

@supports not (animation-timeline: view()) {
  section {
    animation: fadeInUp 0.7s ease-out both;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

section h2 {
  font-size: clamp(1.3rem, 2.8vw, 1.8rem);
  font-weight: 700;
  margin-bottom: 28px;
  padding-bottom: 16px;
  position: relative;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 64px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 3px;
  transition: width var(--transition-smooth);
}

section:hover h2::after {
  width: 120px;
}

section h3 {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 600;
  margin: 28px 0 12px;
  color: var(--text-primary);
  padding-left: 14px;
  position: relative;
}

section h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.25em;
  bottom: 0.25em;
  width: 3px;
  background: var(--gradient-accent);
  border-radius: 3px;
}

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

section a {
  color: var(--accent-2);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

section a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent-2);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-smooth);
}

section a:hover {
  color: var(--accent-1);
}

section a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
  background: var(--accent-1);
}

/* ========== CARD SECTIONS ========== */
section#products,
section#solutions,
section#cases,
section#news,
section#articles,
section#faq,
section#howto,
section#contact {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur-glass)) saturate(1.4);
  -webkit-backdrop-filter: blur(var(--blur-glass)) saturate(1.4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

section#products:hover,
section#solutions:hover,
section#cases:hover,
section#news:hover,
section#articles:hover,
section#faq:hover,
section#howto:hover,
section#contact:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px);
}

/* ========== ARTICLE SECTIONS ========== */
section#article1,
section#article2,
section#article3,
section#article4,
section#article5,
section#article6,
section#article7,
section#article8,
section#article9,
section#article10 {
  background: var(--gradient-card);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 28px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth), transform var(--transition-bounce);
}

section#article1:hover,
section#article2:hover,
section#article3:hover,
section#article4:hover,
section#article5:hover,
section#article6:hover,
section#article7:hover,
section#article8:hover,
section#article9:hover,
section#article10:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transform: translateY(-4px);
}

/* ========== SITEMAP & LINKS ========== */
section#sitemap ul,
section#links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

section#sitemap ul li a,
section#links ul li a {
  display: inline-block;
  padding: 8px 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-smooth);
}

section#sitemap ul li a:hover,
section#links ul li a:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm), var(--shadow-glow);
}

section#sitemap ul li a::after,
section#links ul li a::after {
  display: none;
}

/* ========== LEGAL ========== */
section#legal {
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
}

/* ========== FOOTER ========== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0.6;
}

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  transition: color var(--transition-fast);
}

footer p:first-child {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

footer p:last-child {
  margin-bottom: 0;
  font-size: 0.8rem;
}

footer:hover p {
  color: var(--text-secondary);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  header {
    padding: 72px 20px 56px;
  }

  header h1 {
    font-size: 1.5rem;
  }

  header p {
    font-size: 0.92rem;
  }

  nav ul {
    gap: 2px;
    padding: 8px 12px;
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

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

  nav ul li a {
    padding: 7px 14px;
    font-size: 0.82rem;
  }

  main {
    padding: 0 16px 56px;
  }

  section {
    margin-top: 40px;
  }

  section h2 {
    font-size: 1.2rem;
    margin-bottom: 20px;
  }

  section h3 {
    font-size: 1rem;
  }

  section p {
    font-size: 0.9rem;
  }

  section#products,
  section#solutions,
  section#cases,
  section#news,
  section#articles,
  section#faq,
  section#howto,
  section#contact {
    padding: 24px 18px;
    border-radius: var(--radius-md);
  }

  section#article1,
  section#article2,
  section#article3,
  section#article4,
  section#article5,
  section#article6,
  section#article7,
  section#article8,
  section#article9,
  section#article10 {
    padding: 20px 16px;
  }

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

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

  footer {
    padding: 32px 16px;
  }

  footer p {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  header {
    padding: 56px 16px 44px;
  }

  header h1 {
    font-size: 1.25rem;
    margin-bottom: 16px;
  }

  header p {
    font-size: 0.85rem;
  }

  nav ul li a {
    padding: 6px 12px;
    font-size: 0.78rem;
  }

  section h2 {
    font-size: 1.1rem;
  }

  section h3 {
    font-size: 0.95rem;
  }

  section#products,
  section#solutions,
  section#cases,
  section#news,
  section#articles,
  section#faq,
  section#howto,
  section#contact {
    padding: 20px 14px;
  }
}

/* ========== REDUCED MOTION ========== */
@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;
  }
}

/* ========== PRINT ========== */
@media print {
  body::before,
  header::before,
  header::after,
  footer::before {
    display: none;
  }

  header {
    background: #fff;
    color: #000;
    padding: 40px 20px;
  }

  header h1 {
    -webkit-text-fill-color: #000;
    background: none;
    color: #000;
  }

  nav {
    display: none;
  }

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