/* ============================================
   小区智管家 — 官网共享样式
   Clean Tech Style · Light Theme · Blue/Cyan
   ============================================ */

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

:root {
  --c-primary: #2563eb;
  --c-primary-dark: #1d4ed7;
  --c-secondary: #0ea5e9;
  --c-accent: #06b6d4;
  --c-dark: #0f172a;
  --c-text: #1e293b;
  --c-text-mid: #475569;
  --c-text-light: #94a3b8;
  --c-bg: #f8fafc;
  --c-white: #ffffff;
  --c-border: #e2e8f0;
  --c-border-light: #f1f5f9;
  --gradient: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  --gradient-soft: linear-gradient(135deg, #eff6ff 0%, #ecfeff 100%);
  --gradient-text: linear-gradient(135deg, #2563eb, #06b6d4);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow: 0 4px 24px rgba(0,0,0,.07);
  --shadow-lg: 0 12px 48px rgba(0,0,0,.10);
  --shadow-blue: 0 8px 32px rgba(37,99,235,.18);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --max-w: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Container ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ---------- Section ---------- */
.section { padding: 100px 0; }
.section-sm { padding: 64px 0; }
.section-title {
  text-align: center;
  margin-bottom: 56px;
}
.section-title h2 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--c-dark);
  letter-spacing: -.02em;
  margin-bottom: 14px;
}
.section-title p {
  font-size: 1.1rem;
  color: var(--c-text-mid);
  max-width: 600px;
  margin: 0 auto;
}
.section-tag {
  display: inline-block;
  font-size: .82rem;
  font-weight: 700;
  color: var(--c-primary);
  background: #eff6ff;
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 18px;
  letter-spacing: .04em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  padding: 13px 32px;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(37,99,235,.28);
}
.btn-outline {
  background: #fff;
  color: var(--c-primary);
  border: 2px solid var(--c-border);
}
.btn-outline:hover {
  border-color: var(--c-primary);
  background: #eff6ff;
}
.btn-white {
  background: #fff;
  color: var(--c-primary);
  box-shadow: var(--shadow);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-lg { padding: 16px 40px; font-size: 1.08rem; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border-light);
  transition: all .3s ease;
}
.navbar.scrolled {
  background: rgba(255,255,255,.95);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--c-dark);
  letter-spacing: -.01em;
}
.logo-icon {
  width: 38px; height: 38px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: .98rem;
  font-weight: 500;
  color: var(--c-text-mid);
  transition: color .2s;
  position: relative;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--c-primary);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
}
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-cta .btn { padding: 9px 24px; font-size: .92rem; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--c-text);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 160px 0 100px;
  background: var(--gradient-soft);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(37,99,235,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .4;
  pointer-events: none;
}
.hero-blob-1 {
  width: 400px; height: 400px;
  background: #93c5fd;
  top: -100px; right: -50px;
}
.hero-blob-2 {
  width: 300px; height: 300px;
  background: #67e8f9;
  bottom: -50px; left: 10%;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--c-dark);
  letter-spacing: -.03em;
  line-height: 1.25;
  margin-bottom: 20px;
}
.hero h1 .grad {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--c-text-mid);
  line-height: 1.8;
  margin-bottom: 36px;
  white-space: pre-line;
}
.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-badges {
  display: flex;
  gap: 28px;
  justify-content: center;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  color: var(--c-text-mid);
}
.hero-badge svg { color: var(--c-primary); flex-shrink: 0; }

/* ---------- Page Header (inner pages) ---------- */
.page-header {
  position: relative;
  padding: 140px 0 80px;
  background: var(--gradient-soft);
  text-align: center;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.04) 1px, transparent 1px);
  background-size: 48px 48px;
}
.page-header > * { position: relative; z-index: 2; }
.page-header h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--c-dark);
  letter-spacing: -.02em;
  margin-bottom: 14px;
}
.page-header p {
  font-size: 1.12rem;
  color: var(--c-text-mid);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Pain Points ---------- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.pain-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.pain-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.pain-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.pain-card:hover::before { transform: scaleX(1); }
.pain-icon {
  width: 56px; height: 56px;
  background: #eff6ff;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--c-primary);
}
.pain-card h3 {
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 10px;
}
.pain-card p {
  color: var(--c-text-mid);
  font-size: .98rem;
  line-height: 1.8;
  white-space: pre-line;
}

/* ---------- Solution (Two-sided) ---------- */
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.solution-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: all .3s ease;
}
.solution-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.solution-card.owner {
  border-top: 4px solid var(--c-secondary);
}
.solution-card.admin {
  border-top: 4px solid var(--c-primary);
}
.solution-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.solution-head .icon-box {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
.solution-card.owner .icon-box { background: #ecfeff; }
.solution-card.admin .icon-box { background: #eff6ff; }
.solution-head h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-dark);
}
.solution-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--c-border-light);
  font-size: .98rem;
  color: var(--c-text);
  line-height: 1.6;
}
.solution-list li:last-child { border-bottom: none; }
.solution-list li svg {
  color: var(--c-primary);
  flex-shrink: 0;
  margin-top: 4px;
}

/* ---------- Metrics ---------- */
.metrics {
  background: var(--c-dark);
  position: relative;
  overflow: hidden;
}
.metrics::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 48px 48px;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 2;
}
.metric-item {
  text-align: center;
}
.metric-value {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, #60a5fa, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 8px;
  letter-spacing: -.02em;
}
.metric-label {
  font-size: .98rem;
  color: #94a3b8;
}

/* ---------- Features Grid ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 30px 24px;
  transition: all .3s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: #bfdbfe;
}
.feature-icon {
  width: 52px; height: 52px;
  background: var(--gradient-soft);
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--c-primary);
}
.feature-card h3 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: .92rem;
  color: var(--c-text-mid);
  line-height: 1.6;
}

/* ---------- Features Detailed (features page) ---------- */
.features-detailed {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.feature-detail-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 36px;
  display: flex;
  gap: 24px;
  transition: all .3s ease;
}
.feature-detail-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  transform: translateY(-4px);
}
.feature-detail-card .fd-icon {
  width: 60px; height: 60px;
  background: var(--gradient);
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.feature-detail-card .fd-body h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 8px;
}
.feature-detail-card .fd-body p {
  color: var(--c-text-mid);
  font-size: .98rem;
  line-height: 1.7;
}
.feature-detail-card .fd-tags {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.feature-detail-card .fd-tag {
  font-size: .78rem;
  color: var(--c-primary);
  background: #eff6ff;
  padding: 4px 12px;
  border-radius: 100px;
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}
.price-card {
  background: #fff;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: all .3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}
.price-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--c-primary);
}
.price-card.featured {
  border-color: var(--c-primary);
  box-shadow: var(--shadow-blue);
  transform: scale(1.04);
}
.price-badge {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: var(--gradient);
  color: #fff;
  font-size: .82rem;
  font-weight: 700;
  padding: 6px 20px;
  border-radius: 100px;
  letter-spacing: .03em;
}
.price-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 8px;
}
.price-tag {
  display: inline-block;
  font-size: .82rem;
  color: var(--c-text-light);
  background: var(--c-border-light);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.price-value {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--c-dark);
  margin-bottom: 6px;
  letter-spacing: -.02em;
}
.price-value .unit { font-size: 1.1rem; font-weight: 500; color: var(--c-text-light); }
.price-desc {
  color: var(--c-text-mid);
  font-size: .95rem;
  line-height: 1.8;
  margin-bottom: 28px;
  white-space: pre-line;
  min-height: 56px;
}
.price-card .btn {
  margin-top: auto;
  width: 100%;
}
.price-features {
  text-align: left;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}
.price-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: .93rem;
  color: var(--c-text-mid);
  border-bottom: 1px solid var(--c-border-light);
}
.price-features li svg { color: var(--c-primary); flex-shrink: 0; }
.price-features li:last-child { border-bottom: none; }

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all .25s ease;
}
.faq-item:hover { border-color: #bfdbfe; }
.faq-item.active { border-color: var(--c-primary); box-shadow: var(--shadow); }
.faq-q {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-dark);
  user-select: none;
}
.faq-q .faq-icon {
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  transition: transform .25s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-icon { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
  padding: 0 28px;
  color: var(--c-text-mid);
  font-size: .98rem;
  line-height: 1.8;
}
.faq-item.active .faq-a {
  max-height: 200px;
  padding-bottom: 22px;
}

/* ---------- CTA Section ---------- */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: var(--c-dark);
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 48px 48px;
}
.cta-section::after {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(37,99,235,.3), transparent 70%);
  top: -200px; right: -100px;
  border-radius: 50%;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: -.02em;
}
.cta-inner p {
  font-size: 1.1rem;
  color: #94a3b8;
  margin-bottom: 32px;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- About Page ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-text h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--c-dark);
  margin-bottom: 20px;
  letter-spacing: -.02em;
}
.about-text p {
  color: var(--c-text-mid);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 16px;
}
.about-visual {
  position: relative;
  height: 360px;
  background: var(--gradient-soft);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.about-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.about-visual .stat-circle {
  position: relative;
  z-index: 2;
  text-align: center;
}
.about-visual .stat-circle .big {
  font-size: 4rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.about-visual .stat-circle .label {
  font-size: 1.1rem;
  color: var(--c-text-mid);
  margin-top: 8px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.contact-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: all .3s ease;
}
.contact-card:hover {
  box-shadow: var(--shadow);
  border-color: #bfdbfe;
  transform: translateY(-3px);
}
.contact-card .cc-icon {
  width: 52px; height: 52px;
  background: var(--gradient-soft);
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
  flex-shrink: 0;
}
.contact-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 6px;
}
.contact-card p {
  color: var(--c-text-mid);
  font-size: .98rem;
  line-height: 1.7;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--c-dark);
  color: #94a3b8;
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p {
  font-size: .92rem;
  line-height: 1.8;
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a {
  font-size: .92rem;
  color: #94a3b8;
  transition: color .2s;
}
.footer-col ul li a:hover { color: #fff; }
.footer-social {
  display: flex;
  gap: 14px;
  margin-top: 18px;
}
.footer-social a {
  width: 40px; height: 40px;
  background: rgba(255,255,255,.06);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  transition: all .25s ease;
}
.footer-social a:hover {
  background: var(--c-primary);
  color: #fff;
  transform: translateY(-3px);
}
/* 微信二维码弹出 */
.qrcode-wrap {
  position: relative;
}
.qrcode-popup {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 10px 40px rgba(0,0,0,.18);
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
  margin-bottom: 10px;
  white-space: nowrap;
}
.qrcode-wrap:hover .qrcode-popup {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.qrcode-popup img {
  width: 130px;
  display: block;
  border-radius: 6px;
}
.qrcode-popup p {
  color: #334155;
  font-size: .78rem;
  margin-top: 8px;
  text-align: center;
}
.qrcode-popup::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 8px solid transparent;
  border-top-color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .85rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Animations ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.anim-up { animation: fadeUp .6s ease both; }
.anim-delay-1 { animation-delay: .1s; }
.anim-delay-2 { animation-delay: .2s; }
.anim-delay-3 { animation-delay: .3s; }

/* ---------- Responsive ---------- */
@media (max-width: 968px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 2.2rem; }
  .hero-sub { font-size: 1rem; }
  .page-header h1 { font-size: 2.1rem; }
  .section { padding: 64px 0; }
  .section-title h2 { font-size: 1.8rem; }
  .pain-grid,
  .metrics-grid,
  .features-grid { grid-template-columns: 1fr 1fr; }
  .solution-grid { grid-template-columns: 1fr; }
  .features-detailed { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .about-intro { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 600px) {
  .pain-grid,
  .metrics-grid,
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .metric-value { font-size: 2.4rem; }
  .feature-detail-card { flex-direction: column; }
}

/* ========== Tech Effects ========== */

/* 网格背景缓慢流动 */
@keyframes gridMove {
  0% { background-position: 0 0; }
  100% { background-position: 48px 48px; }
}
.hero::before,
.page-header::before {
  animation: gridMove 20s linear infinite;
}

/* 光斑浮动动画 */
@keyframes blobFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 20px) scale(1.1); }
}
@keyframes blobFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -30px) scale(1.05); }
}
.hero-blob-1 {
  animation: blobFloat1 12s ease-in-out infinite;
}
.hero-blob-2 {
  animation: blobFloat2 15s ease-in-out infinite;
}

/* Canvas 粒子连线 */
.tech-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* 径向脉冲波纹 */
.tech-pulse {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 1;
}
.tech-pulse-ring {
  position: absolute;
  top: 50%; left: 50%;
  width: 100px;
  height: 100px;
  margin-top: -50px;
  margin-left: -50px;
  border: 2px solid rgba(37,99,235,.3);
  border-radius: 50%;
  animation: pulseExpand 4s ease-out infinite;
}
.tech-pulse-ring.r2 {
  animation-delay: 1.3s;
}
.tech-pulse-ring.r3 {
  animation-delay: 2.6s;
}
@keyframes pulseExpand {
  0% {
    width: 100px;
    height: 100px;
    margin-top: -50px;
    margin-left: -50px;
    opacity: .8;
    border-color: rgba(6,182,212,.4);
  }
  100% {
    width: 600px;
    height: 600px;
    margin-top: -300px;
    margin-left: -300px;
    opacity: 0;
    border-color: rgba(37,99,235,.1);
  }
}

/* 浮动圆环 */
.tech-rings {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 1;
}
.tech-ring {
  position: absolute;
  border: 1px solid rgba(37,99,235,.15);
  border-radius: 50%;
}
.tech-ring.r1 {
  width: 200px; height: 200px;
  top: 10%; right: 8%;
  border-top-color: rgba(37,99,235,.4);
  border-right-color: rgba(6,182,212,.3);
  animation: ringRotate 20s linear infinite;
}
.tech-ring.r2 {
  width: 140px; height: 140px;
  bottom: 15%; left: 6%;
  border-bottom-color: rgba(6,182,212,.4);
  border-left-color: rgba(37,99,235,.3);
  animation: ringRotate 15s linear infinite reverse;
}
.tech-ring.r3 {
  width: 80px; height: 80px;
  top: 60%; right: 20%;
  border-top-color: rgba(14,165,233,.5);
  animation: ringRotate 10s linear infinite;
}
@keyframes ringRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 数据连接线 */
.tech-lines {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 1;
  opacity: .3;
}
.tech-line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
  animation: lineGlow 3s ease-in-out infinite;
}
.tech-line.l1 { width: 120px; top: 25%; left: 5%; animation-delay: 0s; }
.tech-line.l2 { width: 80px; top: 55%; right: 10%; animation-delay: 1s; }
.tech-line.l3 { width: 100px; bottom: 20%; left: 15%; animation-delay: 2s; }

@keyframes lineGlow {
  0%, 100% { opacity: .2; transform: scaleX(.8); }
  50% { opacity: .8; transform: scaleX(1.2); }
}

/* 响应式 - 移动端减少动效 */
@media (max-width: 768px) {
  .tech-ring.r1, .tech-ring.r2 { display: none; }
  .tech-particle.p5, .tech-particle.p6, .tech-particle.p7, .tech-particle.p8 { display: none; }
  .tech-line.l3 { display: none; }
}