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

:root {
  --white: #ffffff;
  --black: #0f172a;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --max-w: 1120px;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-700);
  background: var(--white);
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { color: var(--gray-900); font-weight: 700; line-height: 1.25; }

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

/* ========== Navigation ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 1px 8px rgba(0,0,0,0.06); }

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.nav-logo-name { font-size: 17px; font-weight: 700; color: var(--gray-900); }
.nav-logo-sub { font-size: 11px; color: var(--gray-400); letter-spacing: 0.5px; }

.nav-menu { display: flex; align-items: center; gap: 4px; }

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: 8px;
  transition: all 0.2s;
}
.nav-link:hover { color: var(--gray-900); background: var(--gray-100); }

.nav-link.active {
  color: var(--blue-600);
  background: var(--blue-50);
}
.nav-link-cta {
  background: var(--blue-600);
  color: white !important;
}
.nav-link-cta:hover { background: var(--blue-700); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-900);
  border-radius: 2px;
  transition: all 0.3s;
}


/* ========== Hero Particles ========== */
.hero-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ========== Hero ========== */
.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 24px 60px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 50%, #f0f5ff 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background:
    radial-gradient(ellipse 600px 400px at 20% 30%, #3b82f6, transparent),
    radial-gradient(ellipse 500px 300px at 80% 70%, #2563eb, transparent);
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; max-width: 720px; }

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--blue-600);
  background: var(--blue-50);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--gray-900);
  line-height: 1.1;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue-600);
  color: white;
}
.btn-primary:hover { background: var(--blue-700); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(37,99,235,0.35); }
.btn-outline {
  background: transparent;
  color: var(--gray-700);
  border: 1.5px solid var(--gray-300);
}
.btn-outline:hover { border-color: var(--gray-400); background: var(--gray-50); transform: translateY(-1px); }
.btn-sm { padding: 10px 20px; font-size: 13px; }
.btn-full { width: 100%; }

.hero-metrics {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-top: 56px;
  flex-wrap: wrap;
}

.metric { text-align: center; }
.metric-num { display: block; font-size: 2rem; font-weight: 700; color: var(--blue-600); margin-bottom: 4px; }
.metric-label { font-size: 0.85rem; color: var(--gray-400); font-weight: 500; }

/* ========== Sections ========== */
.section { padding: 100px 0; }

.section-header { margin-bottom: 48px; }
.section-header.center { text-align: center; }

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--blue-600);
  background: var(--blue-50);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  letter-spacing: -0.02em;
  margin-bottom: 0;
}

.section-desc {
  font-size: 1rem;
  color: var(--gray-500);
  margin-top: 16px;
  max-width: 480px;
}
.section-header.center .section-desc { margin-left: auto; margin-right: auto; }

/* ========== About ========== */
.about { background: var(--gray-50); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: 20px;
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.about-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 20px;
}
.about-card-label { display: block; font-size: 12px; font-weight: 600; color: var(--gray-400); margin-bottom: 6px; letter-spacing: 0.3px; }
.about-card-value { font-size: 1rem; font-weight: 600; color: var(--gray-800); }

/* ========== Services ========== */
.services { background: var(--white); }

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

.service-card {
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 40px 32px;
  transition: all 0.25s;
  background: var(--white);
}
.service-card:hover {
  border-color: var(--blue-200);
  box-shadow: 0 8px 30px rgba(37,99,235,0.08);
  transform: translateY(-3px);
}

.service-icon {
  width: 56px;
  height: 56px;
  background: var(--blue-50);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-600);
  margin-bottom: 20px;
}
.service-title { font-size: 1.15rem; margin-bottom: 12px; }
.service-desc { font-size: 0.9rem; color: var(--gray-500); line-height: 1.7; }

/* ========== Products ========== */
.products { background: var(--gray-50); }

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 32px 24px;
  transition: all 0.25s;
}
.product-card:hover {
  border-color: var(--blue-200);
  box-shadow: 0 8px 30px rgba(37,99,235,0.06);
  transform: translateY(-2px);
}

.product-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue-100);
  margin-bottom: 12px;
  line-height: 1;
}
.product-title { font-size: 1.05rem; margin-bottom: 8px; }
.product-desc { font-size: 0.85rem; color: var(--gray-500); line-height: 1.6; }

/* ========== Showcase ========== */
.showcase { background: var(--white); }

.showcase-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.showcase-item {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.25s;
}
.showcase-item:hover { box-shadow: 0 8px 30px rgba(0,0,0,0.06); }

.showcase-visual {
  height: 100%;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.showcase-emoji { font-size: 64px; line-height: 1; }

.showcase-body { padding: 32px; }
.showcase-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--blue-600);
  background: var(--blue-50);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 12px;
}
.showcase-name { font-size: 1.3rem; margin-bottom: 10px; }
.showcase-desc { font-size: 0.9rem; color: var(--gray-500); line-height: 1.7; margin-bottom: 20px; }

/* ========== Contact ========== */
.contact { background: var(--gray-50); }

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-items { display: flex; flex-direction: column; gap: 16px; margin-top: 32px; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  color: var(--gray-600);
}
.contact-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--blue-600);
}
.contact-item strong { display: block; font-size: 0.9rem; color: var(--gray-900); margin-bottom: 2px; }
.contact-item p { font-size: 0.85rem; color: var(--gray-500); }

.contact-form {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 36px;
}

.form-title { font-size: 1.15rem; margin-bottom: 24px; }

.form-group { margin-bottom: 16px; }

.form-input {
  width: 100%;
  padding: 13px 16px;
  font-size: 0.9rem;
  border: 1.5px solid var(--gray-200);
  border-radius: 10px;
  background: var(--white);
  color: var(--gray-900);
  outline: none;
  transition: all 0.2s;
  font-family: inherit;
}
.form-input::placeholder { color: var(--gray-400); }
.form-input:focus { border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }

.form-textarea { resize: vertical; min-height: 100px; }

/* ========== Footer ========== */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 60px 0 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-brand strong { display: block; color: var(--white); font-size: 15px; margin-bottom: 2px; }
.footer-brand span { font-size: 12px; color: var(--gray-500); }

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 10px;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--gray-200); }

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: 24px;
  text-align: center;
}
.footer-bottom p { font-size: 12px; margin-bottom: 4px; }
.footer-icp { font-size: 11px !important; color: var(--gray-500); }

/* ========== Mobile ========== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--gray-200);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-link { display: block; padding: 12px 16px; font-size: 15px; }
  .nav-link-cta { text-align: center; }
  .nav-toggle { display: flex; }

  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .services-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .showcase-item { grid-template-columns: 1fr; }
  .showcase-visual { min-height: 180px; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }

  .hero-metrics { gap: 24px; }
}

@media (max-width: 480px) {
  .section { padding: 60px 0; }
  .hero { padding: 100px 16px 40px; }
  .about-cards { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .footer-links { grid-template-columns: 1fr; gap: 24px; }
}