:root {
  --black: rgba(0, 0, 0, 0.9);
  --gray1: #7f7f7f;
  --gray2: #ededed;
  --gray3: #f7f7f7;
  --weixin-green: #07c160;
  --accent-red: #fa5151;
  --accent-yellow: #ffc300;
  --accent-blue: #10aeef;
  --accent-indigo: #1485ee;
  --accent-purple: #6467f0;
  --accent-orange: #fa9d3b;
  --accent-green: #91d300;
  --text-primary: var(--black);
  --text-secondary: rgba(0, 0, 0, 0.65);
  --bg-dark: #121418;
  --bg-light: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  font-size: 16px;
}

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

body {
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-light);
  line-height: 1.6;
}

body.modal-open {
  overflow: hidden;
}

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

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

.container {
  width: min(1120px, 90vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(247, 247, 247, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1.5rem;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand small {
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gray1);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color 0.2s ease;
}

.nav a:hover,
.nav a:focus {
  color: var(--weixin-green);
}

.nav a.cta {
  padding: 0.5rem 1rem;
  border: 1px solid var(--weixin-green);
  border-radius: 999px;
  color: var(--weixin-green);
  font-weight: 600;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.hero {
  padding: 8rem 0 6rem;
  background: linear-gradient(135deg, var(--gray3) 0%, #ffffff 60%);
}

.hero .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  align-items: center;
}

.hero-content .eyebrow {
  color: var(--weixin-green);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-content h1 {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.hero-content .subhead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: var(--weixin-green);
  color: #ffffff;
  box-shadow: 0 12px 24px rgba(7, 193, 96, 0.25);
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(7, 193, 96, 0.3);
}

.btn.ghost {
  border: 1px solid var(--text-secondary);
  color: var(--text-secondary);
}

.hero-visual .grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(100px, 1fr));
  gap: 1rem;
}

.panel {
  position: relative;
  padding: 2.5rem 1.5rem;
  border-radius: 14px;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  align-items: flex-end;
  background: linear-gradient(160deg, rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.9));
  min-height: 160px;
}

.panel.machinery {
  background: linear-gradient(150deg, #1f2a37, #0f172a);
}

.panel.control {
  background: linear-gradient(160deg, #0f172a, #1485ee);
}

.panel.onsite {
  grid-column: span 2;
  background: linear-gradient(160deg, #1c1f26, #07c160);
}

section {
  padding: 5rem 0;
}

.section-intro {
  max-width: 720px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-intro h2 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.section-intro p {
  color: var(--text-secondary);
}

.value-highlights {
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: #ffffff;
}

.value-highlights .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.highlight {
  padding: 1.5rem;
  background: var(--gray3);
  border-radius: 12px;
  text-align: center;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.about {
  background: #ffffff;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.about h3 {
  font-weight: 600;
  margin-bottom: 1rem;
}

.about ul {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  color: var(--text-secondary);
}

.quote {
  margin-top: 2.5rem;
  padding: 1.5rem 2rem;
  background: var(--bg-dark);
  color: #ffffff;
  border-left: 4px solid var(--weixin-green);
  font-size: 1.15rem;
  font-weight: 600;
}

.services {
  background: var(--gray3);
}

.services-table {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background: #ffffff;
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--weixin-green);
}

.service-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.service-card p {
  color: var(--text-secondary);
}

.industries {
  background: #ffffff;
}

.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.industry-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.75rem;
  background: var(--gray3);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-weight: 600;
}

.industry-card small {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.delivery {
  background: linear-gradient(180deg, #ffffff 0%, var(--gray3) 100%);
}

.delivery-steps {
  list-style: none;
  display: grid;
  gap: 1.5rem;
  counter-reset: steps;
}

.delivery-steps li {
  position: relative;
  padding: 1.75rem 1.75rem 1.75rem 3.5rem;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: #ffffff;
}

.delivery-steps li::before {
  counter-increment: steps;
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  left: 1.5rem;
  top: 1.75rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--weixin-green);
  color: #ffffff;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  font-weight: 700;
}

.delivery-steps h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.delivery-steps p {
  color: var(--text-secondary);
}

.cases {
  background: #ffffff;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.case-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  display: grid;
  gap: 1.25rem;
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.case-card:hover {
  border-color: rgba(7, 193, 96, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 26px 48px rgba(15, 23, 42, 0.12);
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray1);
}

.case-meta .case-industry {
  font-weight: 600;
  color: var(--weixin-green);
}

.case-card h3 {
  font-size: 1.3rem;
  line-height: 1.35;
}

.case-summary {
  color: var(--text-secondary);
}

.case-points {
  list-style: none;
  display: grid;
  gap: 0.65rem;
  color: var(--text-secondary);
}

.case-points strong {
  color: var(--text-primary);
  font-weight: 600;
  margin-right: 0.35rem;
}

.contact {
  background: var(--bg-dark);
  color: #ffffff;
}

.contact .container {
  display: grid;
  gap: 2rem;
}

.contact-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
}

.contact p,
.contact span,
.contact a {
  color: rgba(255, 255, 255, 0.85);
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.contact-list strong {
  display: block;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 0.25rem;
}

.contact-form {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 18px;
  padding: 2rem;
  display: grid;
  gap: 1.25rem;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 1100;
}

.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  transform: translateY(24px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 1110;
}

.modal-inner {
  background: #ffffff;
  border-radius: 20px;
  padding: 2.5rem 2.75rem;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.18);
  display: grid;
  gap: 1.5rem;
  text-align: center;
}

.modal-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(7, 193, 96, 0.12);
  color: var(--weixin-green);
  display: grid;
  place-items: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 auto;
}

.modal h3 {
  font-size: 1.4rem;
  font-weight: 600;
}

.modal-message {
  color: var(--text-secondary);
}

.modal .btn {
  justify-self: center;
  min-width: 160px;
}

.modal-backdrop.is-active,
.modal.is-active {
  opacity: 1;
  pointer-events: auto;
}

.modal.is-active {
  transform: translateY(0);
}

.contact-form h3 {
  font-size: 1.4rem;
  font-weight: 600;
}

.form-group {
  display: grid;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

.form-group input,
.form-group textarea {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  color: #ffffff;
  font-size: 0.95rem;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.form-footnote {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer {
  background: #0f1115;
  color: rgba(255, 255, 255, 0.75);
  padding: 2.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer .container {
  display: grid;
  gap: 1rem;
  justify-items: center;
  text-align: center;
}

.foot-brand {
  display: grid;
  gap: 0.35rem;
}

.foot-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.foot-links a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
}

.foot-note {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 960px) {
  .nav {
    position: fixed;
    inset: 0 0 0 50%;
    background: rgba(247, 247, 247, 0.95);
    flex-direction: column;
    padding: 6rem 2rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    gap: 1.5rem;
  }

  .nav.open {
    transform: translateX(0%);
  }

  .nav a.cta {
    align-self: stretch;
    text-align: center;
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 6rem;
  }

  .hero-actions {
    width: 100%;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }

  .value-highlights .container {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: 140px;
    padding: 2rem 1.25rem;
  }

  .delivery-steps li {
    padding-left: 3rem;
  }

  .delivery-steps li::before {
    left: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}