/* ============================================
   Key Point — 关点质量 官网重建设计
   Design: Industrial Precision / 精密工程感
   Color: Navy #1B2A4A · Amber #E87722 · Steel #4A6580
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  --navy: #1B2A4A;
  --navy-light: #2A3F65;
  --navy-dark: #0F1A2E;
  --amber: #E87722;
  --amber-light: #F5A623;
  --amber-dark: #C45E0A;
  --steel: #4A6580;
  --steel-light: #6B8BAB;
  --silver: #B8C4D0;
  --ice: #E8EDF2;
  --snow: #F5F7FA;
  --white: #FFFFFF;
  --text-primary: #1A1A2E;
  --text-secondary: #5A6478;
  --text-muted: #8A94A6;

  --font-display: 'DM Serif Display', 'Noto Serif SC', Georgia, serif;
  --font-body: 'DM Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 3px rgba(27, 42, 74, 0.08);
  --shadow-md: 0 4px 16px rgba(27, 42, 74, 0.1);
  --shadow-lg: 0 8px 32px rgba(27, 42, 74, 0.12);
  --shadow-xl: 0 16px 48px rgba(27, 42, 74, 0.16);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

/* ---------- Utility ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--space-3xl) 0;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 400;
  color: var(--navy);
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
}

/* ---------- Grid Lines Background ---------- */
.grid-bg {
  position: relative;
}

.grid-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27, 42, 74, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 42, 74, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(27, 42, 74, 0.06);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.nav-logo-mark {
  width: 36px;
  height: 36px;
  background: var(--navy);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  position: relative;
  overflow: hidden;
}

.nav-logo-mark::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 12px;
  height: 12px;
  background: var(--amber);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.nav-logo-text span {
  color: var(--amber);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--amber);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--navy);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--navy);
}

.nav-cta {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white) !important;
  background: var(--amber);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.nav-cta:hover {
  background: var(--amber-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(232, 119, 34, 0.3);
}

.nav-cta::after {
  display: none !important;
}

/* Mobile menu button */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, var(--navy-light) 100%);
  overflow: hidden;
  padding-top: 72px;
}

/* Engineering grid overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

/* Decorative corner marks */
.hero::after {
  content: '';
  position: absolute;
  top: 100px;
  right: 80px;
  width: 120px;
  height: 120px;
  border-top: 2px solid rgba(232, 119, 34, 0.3);
  border-right: 2px solid rgba(232, 119, 34, 0.3);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232, 119, 34, 0.12);
  border: 1px solid rgba(232, 119, 34, 0.25);
  padding: 6px 16px;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--amber-light);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-lg);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--amber);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 400;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: var(--space-lg);
}

.hero h1 em {
  font-style: normal;
  color: var(--amber);
}

.hero-desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--amber);
  color: var(--white);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.btn-primary:hover {
  background: var(--amber-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232, 119, 34, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--white);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.05);
}

/* Floating specs panel on hero right */
.hero-specs {
  position: absolute;
  right: 10%;
  top: 50%;
  transform: translateY(-50%);
  width: 320px;
  z-index: 2;
}

.spec-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
  transition: var(--transition);
}

.spec-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(232, 119, 34, 0.3);
}

.spec-card-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--amber);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.spec-card-value {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--white);
  line-height: 1.2;
}

.spec-card-value small {
  font-size: 0.5em;
  color: rgba(255, 255, 255, 0.5);
  margin-left: 4px;
}

.spec-card-desc {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 6px;
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  background: var(--snow);
  border-top: 1px solid var(--ice);
  border-bottom: 1px solid var(--ice);
  padding: var(--space-xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.stat-item {
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: var(--silver);
}

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.75rem);
  color: var(--navy);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-number span {
  color: var(--amber);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

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

.services-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.services-header .section-subtitle {
  margin: 0 auto;
}

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

.service-card {
  background: var(--white);
  border: 1px solid var(--ice);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

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

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--ice);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.3rem;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--amber);
  color: var(--white);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--navy);
  margin-bottom: 12px;
  font-weight: 400;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.service-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  background: var(--snow);
  color: var(--steel);
  border-radius: 100px;
  letter-spacing: 0.02em;
}

/* ---------- About Preview ---------- */
.about-preview {
  background: var(--navy);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.about-preview::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.about-preview .container {
  position: relative;
  z-index: 2;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.about-preview .section-label {
  color: var(--amber);
}

.about-preview .section-title {
  color: var(--white);
}

.about-preview .section-subtitle {
  color: rgba(255, 255, 255, 0.6);
}

.about-text {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.9;
  margin-bottom: var(--space-lg);
}

.about-text strong {
  color: var(--white);
  font-weight: 600;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
}

.about-feature-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: var(--amber);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.about-feature-text h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 2px;
}

.about-feature-text p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Equipment showcase on right */
.about-equipment {
  position: relative;
}

.equipment-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
}

.equipment-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.equipment-card-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.equipment-card-badge {
  font-size: 0.7rem;
  padding: 3px 10px;
  background: rgba(232, 119, 34, 0.15);
  color: var(--amber-light);
  border-radius: 100px;
}

.equipment-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.equipment-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.equipment-dot {
  width: 6px;
  height: 6px;
  background: var(--amber);
  border-radius: 50%;
  flex-shrink: 0;
}

.equipment-item span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

.equipment-item strong {
  color: var(--white);
}

/* ---------- Cases ---------- */
.cases {
  background: var(--snow);
}

.cases-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-2xl);
}

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

.case-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--ice);
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.case-card-img {
  height: 180px;
  background: linear-gradient(135deg, var(--ice), var(--snow));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-card-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27, 42, 74, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 42, 74, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
}

.case-card-img .case-icon {
  font-size: 2rem;
  z-index: 1;
}

.case-card-body {
  padding: 20px;
}

.case-card-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--amber);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.case-card-body h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--navy);
  font-weight: 400;
  margin-bottom: 8px;
}

.case-card-body p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Partners / OEM ---------- */
.partners {
  background: var(--white);
  padding: var(--space-2xl) 0;
}

.partners-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.partners-header .section-label {
  margin-bottom: 4px;
}

.partners-header p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.partner-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: 20px;
  opacity: 0.6;
}

.partner-logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  padding: 8px 12px;
  border-radius: 6px;
  transition: all 0.3s ease;
  background: rgba(27, 58, 92, 0.04);
}

.partner-logo-item:hover {
  opacity: 1;
  background: rgba(27, 58, 92, 0.08);
  transform: translateY(-2px);
}

.partner-logo-item svg {
  width: auto;
  height: 32px;
  max-width: 80px;
}

@media (max-width: 900px) {
  .partner-logos {
    flex-wrap: wrap;
    gap: 14px;
  }
  .partner-logo-item svg {
    height: 28px;
  }
}

@media (max-width: 600px) {
  .partner-logos {
    flex-wrap: wrap;
    gap: 10px;
  }
  .partner-logo-item svg {
    height: 24px;
  }
  .partner-logo-item {
    padding: 6px 8px;
  }
}

/* Remove old text-based styles */
.partner-logo {
  display: none;
}

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--navy-dark), var(--navy));
  padding: var(--space-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--white);
  margin-bottom: var(--space-md);
  font-weight: 400;
}

.cta-section h2 em {
  font-style: normal;
  color: var(--amber);
}

.cta-section p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: var(--space-xl);
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.5);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-col ul a:hover {
  color: var(--amber);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 0.85rem;
}

.footer-contact-item .icon {
  color: var(--amber);
  margin-top: 2px;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

.footer-bottom a {
  color: var(--amber);
}

/* ---------- Floating Contact ---------- */
.float-contact {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 900;
}

.float-contact-btn {
  width: 56px;
  height: 56px;
  background: var(--amber);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--white);
  box-shadow: 0 4px 20px rgba(232, 119, 34, 0.4);
  transition: var(--transition);
}

.float-contact-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(232, 119, 34, 0.5);
}

.float-contact-panel {
  position: absolute;
  bottom: 68px;
  right: 0;
  width: 280px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
}

.float-contact-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.float-contact-panel h4 {
  font-size: 0.95rem;
  color: var(--navy);
  margin-bottom: 16px;
  font-weight: 600;
}

.float-contact-panel .contact-line {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--ice);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.float-contact-panel .contact-line:last-child {
  border-bottom: none;
}

.float-contact-panel .contact-line .icon {
  color: var(--amber);
  font-size: 1rem;
  width: 20px;
  text-align: center;
}

/* ---------- Scroll Animations ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.fade-up:nth-child(1) { transition-delay: 0ms; }
.fade-up:nth-child(2) { transition-delay: 100ms; }
.fade-up:nth-child(3) { transition-delay: 200ms; }
.fade-up:nth-child(4) { transition-delay: 300ms; }
.fade-up:nth-child(5) { transition-delay: 400ms; }
.fade-up:nth-child(6) { transition-delay: 500ms; }

/* ---------- Scroll Gallery (设备展示) ---------- */
.scroll-gallery {
  position: relative;
  overflow: hidden;
  padding: 0 40px;
}
.scroll-gallery::before,
.scroll-gallery::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 40px;
  z-index: 2;
  pointer-events: none;
}
.scroll-gallery::before {
  left: 0;
  background: linear-gradient(to right, var(--white), transparent);
}
.scroll-gallery::after {
  right: 0;
  background: linear-gradient(to left, var(--white), transparent);
}
.scroll-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-behavior: smooth;
  padding: 8px 4px 16px;
  cursor: grab;
}
.scroll-track:active { cursor: grabbing; }
.scroll-track::-webkit-scrollbar { height: 4px; }
.scroll-track::-webkit-scrollbar-track { background: var(--ice); border-radius: 2px; }
.scroll-track::-webkit-scrollbar-thumb { background: var(--steel-light); border-radius: 2px; }
.gallery-item {
  flex: 0 0 220px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--ice);
  transition: var(--transition);
}
.gallery-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--amber); }
.gallery-img {
  height: 140px;
  background: var(--navy);
}
.gallery-caption {
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--white);
  text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-specs { display: none; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .scroll-gallery { padding: 0 24px; }
  .gallery-item { flex: 0 0 180px; }

  /* Mobile menu */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 24px;
    border-bottom: 1px solid var(--ice);
    box-shadow: var(--shadow-lg);
    gap: 16px;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero h1 {
    font-size: clamp(2rem, 8vw, 2.8rem);
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-item:nth-child(2)::after {
    display: none;
  }

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

  .cases-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .float-contact {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 480px) {
  .section {
    padding: var(--space-2xl) 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions a {
    text-align: center;
    justify-content: center;
  }

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

  .stat-item::after {
    display: none !important;
  }
}