/* CSS Variables */
:root {
  --bg-primary: #030014;
  --bg-glass: rgba(255, 255, 255, 0.02);
  --text-primary: rgba(255, 255, 255, 0.85);
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-muted: rgba(255, 255, 255, 0.55);
  --border-subtle: rgba(255, 255, 255, 0.1);
  --accent-blue: #2EA7FF;
  --accent-purple: #9381FF;
  --accent-green: #13DDC4;
  --header-height: 72px;
  --radius-pill: 999px;
  --radius-card: 24px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px; /* 固定顶栏高 72px，跳转锚点时避免标题被遮挡 */
}

body {
  font-family: "Noto Sans SC", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(3, 0, 20, 0.5);
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  position: relative;
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  color: var(--accent-blue);
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-icon svg {
  width: 100%;
  height: 100%;
}

.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}

.site-nav {
  display: flex;
  gap: 32px;
  margin-left: auto;
}

.site-nav a {
  position: relative;
  font-size: 15px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: #fff;
}

/* Header scrolled state — adds depth + glow on scroll */
.site-header.scrolled {
  background: rgba(3, 0, 20, 0.82);
  border-bottom-color: rgba(46, 167, 255, 0.28);
  box-shadow: 0 10px 40px rgba(46, 167, 255, 0.12);
}

/* ===== Mobile nav toggle (hidden on desktop) ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 10px;
  border: none;
  background: transparent;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-toggle.active .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px 24px;
  background: rgba(3, 0, 20, 0.96);
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  font-size: 17px;
  color: var(--text-secondary);
  padding: 14px 8px;
  border-radius: 12px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.mobile-menu a:hover,
.mobile-menu a:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 48px 100px;
  text-align: left;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 56px;
}

.aurora-layer {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  will-change: transform;
}

.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  will-change: transform;
}

.aurora-cyan {
  width: 1100px;
  height: 1100px;
  left: -300px;
  top: -300px;
  background: radial-gradient(circle, rgba(46, 167, 255, 0.5) 0%, rgba(46, 167, 255, 0) 70%);
  animation: float-aurora 12s ease-in-out infinite alternate,
    glow-pulse 6s ease-in-out infinite;
}

.aurora-purple {
  width: 1300px;
  height: 1300px;
  right: -400px;
  top: -300px;
  background: radial-gradient(circle, rgba(147, 129, 255, 0.42) 0%, rgba(147, 129, 255, 0) 70%);
  animation: float-aurora 14s ease-in-out infinite alternate-reverse,
    glow-pulse 7s ease-in-out infinite;
}

.aurora-green {
  width: 1100px;
  height: 1100px;
  left: 18%;
  bottom: -400px;
  background: radial-gradient(circle, rgba(19, 221, 196, 0.34) 0%, rgba(19, 221, 196, 0) 70%);
  animation: float-aurora 16s ease-in-out infinite alternate,
    glow-pulse 8s ease-in-out infinite;
}

@keyframes float-aurora {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(90px, -70px) scale(1.18); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 28px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  color: var(--accent-blue);
  font-size: 14px;
  font-weight: 500;
}

.hero-headline {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.18;
  color: #fff;
}

.hero-subheadline {
  max-width: 480px;
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 8px;
}

.btn-primary {
  padding: 20px 32px;
  border-radius: var(--radius-pill);
  background: var(--accent-blue);
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 12px 40px rgba(46, 167, 255, 0.3);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(46, 167, 255, 0.4);
}

.btn-secondary {
  padding: 20px 32px;
  border-radius: var(--radius-pill);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.04);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  z-index: 1;
  margin: 0;
  width: 100%;
  height: 64vh;
  max-height: 600px;
  border-radius: 24px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.05),
    0 4px 4px rgba(0, 0, 0, 0.05),
    0 10px 10px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border-radius: 24px;
}

/* Footer */
.site-footer {
  background: var(--bg-glass);
  border-top: 1px solid var(--border-subtle);
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  padding: 60px 48px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 48px;
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-tagline-sub {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 280px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-icp {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

.footer-social {
  display: flex;
  gap: 20px;
}

.footer-social a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-social a:hover,
.footer-social a:focus-visible {
  color: #fff;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-headline {
    font-size: 48px;
  }
}

@media (max-width: 900px) {
  .hero {
    padding: 140px 24px 80px;
    min-height: auto;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-content {
    max-width: 720px;
    margin: 0 auto;
    align-items: center;
  }

  .hero-visual {
    height: auto;
    aspect-ratio: 2 / 1;
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--radius-card);
    border: 1px solid var(--border-subtle);
  }

  .hero-visual::after,
  .hero-visual img {
    border-radius: var(--radius-card);
  }

  .solution-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-cols {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-col {
    align-items: center;
  }
}

@media (max-width: 768px) {
  .header-inner,
  .footer-inner {
    padding: 0 24px;
  }

  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 140px 24px 80px;
  }

  .hero-content {
    gap: 24px;
  }

  .hero-headline {
    font-size: 36px;
  }

  .hero-subheadline {
    font-size: 16px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .hero-visual {
    margin-top: 48px;
  }

  .footer-top,
  .footer-bottom {
    flex-direction: column;
    gap: 24px;
    align-items: center;
    text-align: center;
  }

  .section-inner {
    padding: 0 24px;
  }

  .section-title {
    font-size: 32px;
  }

  .section-desc {
    font-size: 16px;
  }

  .features,
  .products,
  .solutions,
  .about,
  .contact {
    padding: 100px 0;
  }

  .contact-inner {
    gap: 32px;
  }

  .contact-email {
    font-size: 17px;
    padding: 16px 24px;
  }

  .contact-email-icon {
    width: 38px;
    height: 38px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 32px 24px;
  }

  .feature-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .product-card,
  .product-card-left,
  .product-card-right {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 24px;
  }

  .product-card-left .product-visual,
  .product-card-right .product-visual,
  .product-card-left .product-info,
  .product-card-right .product-info {
    order: unset;
  }

  .product-name {
    font-size: 24px;
  }

  .about-text .section-title {
    text-align: center;
  }

  .about-text .section-badge {
    align-self: center;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .about-stats .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }

  .about-stats .stat-item:last-child {
    border-bottom: none;
  }
}

/* Section Common */
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}

.section-header {
  max-width: 720px;
  margin: 0 auto 64px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  color: var(--accent-blue);
  font-size: 14px;
  font-weight: 500;
}

/* 不同板块使用不同强调色，打破"千篇一律"的标题节奏 */
#features .section-badge { color: var(--accent-blue); }
#product .section-badge { color: var(--accent-purple); }
#solution .section-badge { color: var(--accent-green); }
#about .section-badge { color: var(--accent-green); }
#contact .section-badge { color: var(--accent-blue); }

/* 板块 header 节奏错落：产品区左对齐，与居中板块形成对比 */
#product .section-header {
  max-width: none;
  text-align: left;
  align-items: flex-start;
  margin-left: 0;
}

#product .section-badge {
  align-self: flex-start;
}

.section-title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.15;
  color: #fff;
}

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Features */
.features {
  position: relative;
  padding: 140px 0;
  background: var(--bg-primary);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  position: relative;
  overflow: hidden;
  padding: 40px 32px;
  border-radius: var(--radius-card);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(46, 167, 255, 0.55);
  box-shadow: 0 24px 70px rgba(46, 167, 255, 0.22),
    inset 0 0 0 1px rgba(46, 167, 255, 0.25);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-icon-blue {
  background: rgba(46, 167, 255, 0.1);
  color: var(--accent-blue);
}

.feature-icon-purple {
  background: rgba(147, 129, 255, 0.1);
  color: var(--accent-purple);
}

.feature-icon-green {
  background: rgba(19, 221, 196, 0.1);
  color: var(--accent-green);
}

.feature-title {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Products */
.products {
  position: relative;
  padding: 140px 0;
  background: linear-gradient(180deg, rgba(46, 167, 255, 0.05) 0%, rgba(147, 129, 255, 0.05) 100%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.product-list {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.product-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 48px;
  border-radius: var(--radius-card);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
}

.product-card-left .product-visual {
  order: 1;
}

.product-card-left .product-info {
  order: 2;
}

.product-card-right .product-visual {
  order: 2;
}

.product-card-right .product-info {
  order: 1;
}

.product-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  padding: 8px;
  border-radius: 20px;
  background: linear-gradient(160deg, rgba(46, 167, 255, 0.06), rgba(147, 129, 255, 0.06));
  border: 1px solid var(--border-subtle);
}

.product-visual img {
  width: 100%;
  height: 100%;
  max-height: 360px;
  object-fit: cover;
  border-radius: 20px;
  transition: transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.product-card:hover {
  border-color: rgba(147, 129, 255, 0.5);
  box-shadow: 0 28px 80px rgba(147, 129, 255, 0.2);
}

.product-card:hover .product-visual img {
  transform: scale(1.06);
}

.product-visual svg {
  width: 100%;
  max-width: 280px;
  height: auto;
}

.product-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.product-name {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
}

.product-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.product-link {
  display: inline-flex;
  align-self: flex-start;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.product-link:hover,
.product-link:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(4px);
}

/* Solutions */
.solutions {
  position: relative;
  padding: 140px 0;
  background: var(--bg-primary);
}

.solution-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.solution-subcol {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.solution-card {
  position: relative;
  padding: 48px 32px;
  border-radius: var(--radius-card);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: transform var(--transition-base);
}

.solution-card:hover {
  transform: translateY(-8px);
  border-color: rgba(147, 129, 255, 0.55);
  box-shadow: 0 24px 70px rgba(147, 129, 255, 0.22),
    inset 0 0 0 1px rgba(147, 129, 255, 0.25);
}

.solution-num {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 72px;
  font-weight: 700;
  line-height: 1;
  color: rgba(147, 129, 255, 0.22);
}

.solution-card-feature {
  padding: 56px 44px;
}

.solution-card-feature .solution-num {
  font-size: 104px;
  top: 32px;
  right: 32px;
}

.solution-card-feature .solution-name {
  font-size: 32px;
}

.solution-card-feature .solution-desc {
  font-size: 16px;
  max-width: 42ch;
}

.solution-name {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.solution-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* About */
.about {
  position: relative;
  padding: 140px 0;
  background: linear-gradient(180deg, rgba(19, 221, 196, 0.05) 0%, rgba(46, 167, 255, 0.05) 100%);
  border-top: 1px solid var(--border-subtle);
}

.about-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}

.about-text .section-title {
  text-align: center;
}

.about-text .section-badge {
  align-self: center;
}

.about-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  background: var(--bg-glass);
  overflow: hidden;
}

.stat-item {
  padding: 40px 24px;
  text-align: center;
  border-right: 1px solid var(--border-subtle);
}

.stat-item:last-child {
  border-right: none;
}

.stat-value {
  display: block;
  font-size: 46px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.stat-unit {
  font-size: 20px;
  color: var(--accent-blue);
}

.stat-label {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 3px;
}

/* Print */
@media print {
  .aurora,
  .hero-visual,
  .site-header {
    display: none;
  }

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

/* ===== Scroll Reveal Animation ===== */
/* 仅在 JS 启用时隐藏（无 JS / noscript 时元素保持可见） */
.js-reveal .reveal {
  opacity: 0;
  transform: translateY(48px) scale(0.98);
  transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.js-reveal .reveal.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ===== Hero visual mask + hover zoom ===== */
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: linear-gradient(
    160deg,
    rgba(46, 167, 255, 0.06) 0%,
    rgba(3, 0, 20, 0) 55%,
    rgba(147, 129, 255, 0.05) 100%
  );
  pointer-events: none;
  z-index: 2;
}

.hero-visual img {
  transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.hero-visual:hover img {
  transform: scale(1.1);
}

/* ===== Hero grid texture ===== */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.06) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(
    ellipse 85% 65% at 50% 42%,
    #000 0%,
    transparent 78%
  );
  mask-image: radial-gradient(
    ellipse 85% 65% at 50% 42%,
    #000 0%,
    transparent 78%
  );
  animation: grid-drift 10s linear infinite;
  pointer-events: none;
}

@keyframes grid-drift {
  0% { background-position: 0 0; }
  100% { background-position: 56px 56px; }
}

/* ===== Reduced motion: disable all enhancements (合并全局降级 + 元素级降级) ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .aurora,
  .hero::before {
    animation: none;
  }

  .hero-visual img,
  .product-visual img {
    transition: none;
  }

  .hero-visual:hover img,
  .product-card:hover .product-visual img {
    transform: none;
  }
}

/* ===== Contact ===== */
.contact {
  position: relative;
  padding: 140px 0;
  background: linear-gradient(180deg, rgba(19, 221, 196, 0.05) 0%, rgba(46, 167, 255, 0.05) 100%);
  border-top: 1px solid var(--border-subtle);
}

.contact-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  max-width: 720px;
  margin: 0 auto;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 32px;
  border-radius: var(--radius-pill);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-size: 20px;
  font-weight: 500;
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  transition: transform var(--transition-base), border-color var(--transition-base),
    box-shadow var(--transition-base), color var(--transition-base);
}

.contact-email:hover,
.contact-email:focus-visible {
  transform: translateY(-4px);
  color: var(--accent-blue);
  border-color: rgba(46, 167, 255, 0.5);
  box-shadow: 0 18px 50px rgba(46, 167, 255, 0.2);
}

.contact-email-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  background: rgba(46, 167, 255, 0.12);
  color: var(--accent-blue);
}

.contact-email-text {
  letter-spacing: 0.01em;
}

.contact-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 40px;
  border-radius: var(--radius-card);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  font-size: 13px;
  color: var(--text-secondary);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.5;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--text-muted);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(46, 167, 255, 0.18);
}

.form-submit {
  align-self: flex-start;
  cursor: pointer;
  border: none;
}

.form-status {
  font-size: 14px;
  color: var(--accent-green);
}

/* ===== Design upgrades (v16) ===== */

/* Hero 标题流动渐变文字 */
.gradient-text {
  background: linear-gradient(
    100deg,
    #ffffff 0%,
    #9fd4ff 25%,
    #c9bcff 50%,
    #9ff3e6 75%,
    #ffffff 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: gradient-shimmer 6s linear infinite;
}

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

/* 顶部滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple), var(--accent-green));
  box-shadow: 0 0 12px rgba(46, 167, 255, 0.6);
}

/* 导航当前项高亮 */
.site-nav a.active {
  color: #fff;
}

.site-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
}

/* 能力标签跑马灯 */
.ticker {
  position: relative;
  overflow: hidden;
  padding: 22px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-primary);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker-scroll 30s linear infinite;
}

.ticker-group {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding-right: 28px;
}

.ticker-track span {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.ticker-track .ticker-dot {
  color: var(--accent-blue);
}

@keyframes ticker-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}