/* ==========================================================================
   上海芯富发科技有限公司 (SFFIC) 官方网站样式表
   Visual Style: Hard Tech Obsidian & Tech Blue Neon Glassmorphism
   ========================================================================== */

:root {
  --bg-dark: #060B17;
  --bg-surface: #0B1426;
  --bg-card: rgba(15, 26, 50, 0.7);
  --bg-card-hover: rgba(22, 38, 74, 0.85);
  --border-color: rgba(0, 168, 255, 0.2);
  --border-glow: rgba(0, 229, 255, 0.4);
  
  --primary: #00A8FF;
  --primary-glow: #00E5FF;
  --accent-cyan: #00F5D4;
  --text-main: #FFFFFF;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(0, 168, 255, 0.25);
  --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography & Headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.3;
}

p {
  color: var(--text-muted);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-normal);
}

/* Badges & Accents */
.section-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(0, 168, 255, 0.12);
  border: 1px solid rgba(0, 168, 255, 0.3);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--primary-glow);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.gradient-text {
  background: linear-gradient(135deg, #00A8FF 0%, #00F5D4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Glassmorphism Panel */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.glass-panel:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-normal);
  border: none;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, #0088FF 0%, #00C6FF 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 15px rgba(0, 168, 255, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0099FF 0%, #00D8FF 100%);
  box-shadow: 0 6px 20px rgba(0, 168, 255, 0.55);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary);
  color: var(--primary-glow);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(6, 11, 23, 0.85);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(6, 11, 23, 0.96);
  border-bottom-color: var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-badge {
  background: linear-gradient(135deg, #0088FF, #00E5FF);
  color: #060B17;
  font-weight: 900;
  font-size: 1.1rem;
  padding: 6px 12px;
  border-radius: 6px;
  letter-spacing: 1px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.5px;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--primary-glow);
  font-weight: 600;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-link:hover {
  color: var(--primary-glow);
}

.nav-link.contact-btn {
  padding: 8px 18px;
  background: rgba(0, 168, 255, 0.15);
  border: 1px solid var(--primary);
  border-radius: 6px;
  color: var(--primary-glow);
}

.nav-link.contact-btn:hover {
  background: var(--primary);
  color: #060B17;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: var(--transition-normal);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 130px 0 80px 0;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 168, 255, 0.18) 0%, rgba(6, 11, 23, 0) 70%);
  z-index: 0;
  pointer-events: none;
}

.hero-grid-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  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: 40px 40px;
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 960px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 168, 255, 0.1);
  border: 1px solid rgba(0, 168, 255, 0.25);
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-glow);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-desc {
  font-size: 1.1rem;
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto 36px auto;
  color: var(--text-muted);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
}

/* Hero Metrics */
.hero-metrics {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: rgba(11, 20, 38, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px 20px;
  margin-top: 20px;
  box-shadow: var(--shadow-sm);
}

.metric-card {
  text-align: center;
  flex: 1;
}

.metric-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: #FFFFFF;
  font-family: 'Inter', sans-serif;
}

.metric-num .unit {
  font-size: 1.2rem;
  color: var(--primary-glow);
  margin-left: 2px;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.metric-divider {
  width: 1px;
  height: 45px;
  background: rgba(255, 255, 255, 0.1);
}

/* Section Common */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  margin-bottom: 50px;
}

.section-header.text-center {
  text-align: center;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.about-card {
  padding: 32px 24px;
  border-top: 3px solid var(--primary);
}

.about-card .card-icon {
  color: var(--primary-glow);
  margin-bottom: 20px;
}

.about-card h3 {
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.about-card p {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Turnkey Section */
.turnkey-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.turnkey-item {
  padding: 36px 30px;
  position: relative;
  overflow: hidden;
}

.turnkey-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--accent-cyan));
}

.turnkey-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.turnkey-num {
  font-size: 1.8rem;
  font-weight: 900;
  color: rgba(0, 168, 255, 0.4);
  font-family: 'Inter', sans-serif;
}

.turnkey-header h3 {
  font-size: 1.3rem;
}

.turnkey-summary {
  font-size: 0.95rem;
  margin-bottom: 20px;
  color: #CBD5E1;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 18px;
  line-height: 1.6;
}

.feature-list li::before {
  content: '▪';
  color: var(--primary-glow);
  position: absolute;
  left: 0;
  font-size: 1rem;
}

.feature-list li strong {
  color: #FFFFFF;
}

/* Testing System Specs Section */
.specs-wrapper {
  padding: 40px;
}

.equipment-badge {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  background: rgba(0, 245, 212, 0.1);
  border: 1px solid rgba(0, 245, 212, 0.3);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.specs-intro h3 {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.specs-intro p {
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 30px;
  max-width: 1000px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 36px;
}

.specs-table, .matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.specs-table th, .matrix-table th {
  background: rgba(0, 168, 255, 0.15);
  color: #FFFFFF;
  padding: 16px;
  font-weight: 700;
  font-size: 0.95rem;
  border-bottom: 2px solid var(--primary);
}

.specs-table td, .matrix-table td {
  padding: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.specs-table tr:hover, .matrix-table tr:hover {
  background: rgba(0, 168, 255, 0.05);
}

.specs-table td strong, .matrix-table td strong {
  color: #FFFFFF;
}

/* Workflow Steps */
.kgd-workflow {
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.workflow-title {
  font-size: 1.15rem;
  margin-bottom: 20px;
  color: #FFFFFF;
  text-align: center;
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step-card {
  background: rgba(6, 11, 23, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 20px;
}

.step-badge {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--primary-glow);
  margin-bottom: 8px;
  font-family: 'Inter', sans-serif;
}

.step-card h5 {
  font-size: 1rem;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.85rem;
  line-height: 1.6;
}

/* Reliability Section */
.reliability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.reliability-card {
  padding: 30px 24px;
}

.rel-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.rel-badge.red {
  background: rgba(239, 68, 68, 0.15);
  color: #F87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.reliability-card h4 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.reliability-card > p {
  font-size: 0.9rem;
  margin-bottom: 18px;
  line-height: 1.6;
}

.rel-solution {
  background: rgba(0, 168, 255, 0.08);
  border-left: 3px solid var(--accent-cyan);
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
}

.sol-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.rel-solution p {
  font-size: 0.85rem;
  color: #E2E8F0;
  margin: 0;
  line-height: 1.5;
}

/* Applications Section */
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.app-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
}

.app-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.app-img-box {
  height: 140px;
  position: relative;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  padding: 12px;
}

.rail-bg {
  background: linear-gradient(180deg, rgba(6,11,23,0.3) 0%, rgba(6,11,23,0.9) 100%), #1E293B;
}

.ev-bg {
  background: linear-gradient(180deg, rgba(6,11,23,0.3) 0%, rgba(6,11,23,0.9) 100%), #0F3854;
}

.solar-bg {
  background: linear-gradient(180deg, rgba(6,11,23,0.3) 0%, rgba(6,11,23,0.9) 100%), #1B3B2B;
}

.server-bg {
  background: linear-gradient(180deg, rgba(6,11,23,0.3) 0%, rgba(6,11,23,0.9) 100%), #2D1B4E;
}

.app-tag {
  background: rgba(0, 168, 255, 0.9);
  color: #060B17;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
}

.app-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.app-content h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.app-content p {
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}

.app-points {
  list-style: none;
  font-size: 0.8rem;
  color: #94A3B8;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 12px;
}

.app-points li {
  position: relative;
  padding-left: 12px;
}

.app-points li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--primary-glow);
  font-weight: bold;
}

/* Contact Section (Pure Email Focus) */
.contact-box {
  padding: 60px 40px;
  max-width: 800px;
  margin: 0 auto;
}

.max-w-600 {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 40px;
}

.email-card {
  background: rgba(0, 168, 255, 0.06);
  border: 1px solid rgba(0, 168, 255, 0.3);
  border-radius: 12px;
  padding: 24px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 30px;
}

.email-icon {
  color: var(--primary-glow);
  display: flex;
  align-items: center;
}

.email-details {
  text-align: left;
  flex: 1;
}

.email-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.email-address {
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.5px;
}

.email-address:hover {
  color: var(--primary-glow);
}

.btn-copy {
  background: var(--primary);
  color: #060B17;
  padding: 10px 22px;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-copy:hover {
  background: var(--primary-glow);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 229, 255, 0.3);
}

.contact-notice {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: left;
  line-height: 1.5;
}

/* Footer */
.footer {
  background: #030711;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 20px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 380px;
}

.footer-tagline {
  font-size: 0.9rem;
  margin-top: 16px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: #FFFFFF;
}

.footer-col a, .footer-contact-item {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.footer-col a:hover {
  color: var(--primary-glow);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
}

.footer-bottom-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .turnkey-grid {
    grid-template-columns: 1fr;
  }
  
  .reliability-grid {
    grid-template-columns: 1fr;
  }
  
  .app-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .workflow-steps {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #060B17;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-metrics {
    flex-direction: column;
    gap: 20px;
  }
  
  .metric-divider {
    width: 100%;
    height: 1px;
  }
  
  .app-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 24px;
  }
  
  .email-card {
    flex-direction: column;
    text-align: center;
  }
  
  .email-details {
    text-align: center;
  }
  
  .footer-bottom-flex {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}