/* QiaYun Power - Custom Styles */
:root {
  --primary: #1e3a5f;
  --primary-light: #2d5a8e;
  --accent: #e8a838;
  --accent-hover: #d4952e;
  --dark: #0f1b2d;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-600: #475569;
  --gray-800: #1e293b;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--gray-800);
  line-height: 1.6;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.1); }
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.nav-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 18px;
}
.nav-logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}
.nav-logo-text span { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--gray-600);
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary); }

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: 4px;
  background: var(--gray-100);
  border-radius: 8px;
  padding: 3px;
}
.lang-option {
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  transition: all 0.2s;
  border: none;
  background: none;
}
.lang-option:hover { color: var(--primary); }
.lang-option.active {
  background: white;
  color: var(--primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Mobile Menu */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-800);
  margin: 6px 0;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  padding: 140px 24px 80px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(232,168,56,0.15) 0%, transparent 60%);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-content { z-index: 1; }
.hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}
.hero p {
  font-size: 18px;
  line-height: 1.8;
  opacity: 0.9;
  margin-bottom: 36px;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: rgba(255,255,255,0.15);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
}
.btn-secondary:hover { background: rgba(255,255,255,0.25); }

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-graphic {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  background: rgba(255,255,255,0.05);
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,0.1);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 32px;
}
.hero-card {
  background: rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.08);
}
.hero-card-icon { font-size: 36px; margin-bottom: 12px; }
.hero-card-label { font-size: 13px; opacity: 0.8; }
.hero-card-value { font-size: 28px; font-weight: 700; color: var(--accent); }

/* Section base */
.section {
  padding: 80px 24px;
}
.section-dark {
  background: var(--gray-50);
}
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
}
.section-header p {
  font-size: 18px;
  color: var(--gray-600);
}

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.product-card {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
  cursor: pointer;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}
.product-img {
  height: 220px;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--primary);
  overflow: hidden;
}
.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-info { padding: 24px; }
.product-info h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.product-info p {
  font-size: 14px;
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.6;
}
.product-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.product-tag {
  padding: 4px 12px;
  background: var(--gray-100);
  border-radius: 20px;
  font-size: 12px;
  color: var(--primary);
  font-weight: 500;
}
.portfolio-strip {
  max-width: 1200px;
  margin: 32px auto 0;
  padding: 20px 24px;
  background: linear-gradient(135deg, rgba(30,58,95,0.06), rgba(232,168,56,0.1));
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.portfolio-strip span {
  color: var(--gray-600);
  font-size: 14px;
  font-weight: 700;
  margin-right: 4px;
}
.portfolio-strip strong {
  padding: 7px 13px;
  background: white;
  border: 1px solid rgba(30,58,95,0.1);
  border-radius: 999px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

/* Solutions */
.solutions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.business-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.solution-card {
  background: white;
  border-radius: 16px;
  padding: 40px;
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
}
.solution-card:hover {
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
}
.solution-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 24px;
}
.solution-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.solution-card p {
  color: var(--gray-600);
  margin-bottom: 24px;
  line-height: 1.8;
}
.solution-features {
  list-style: none;
  display: grid;
  gap: 12px;
}
.solution-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--gray-800);
}
.solution-features li::before {
  content: '✓';
  width: 24px;
  height: 24px;
  background: rgba(30,58,95,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--primary);
  flex-shrink: 0;
}

/* Markets */
.target-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.target-card {
  padding: 32px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid var(--gray-200);
  border-radius: 18px;
  box-shadow: 0 8px 28px rgba(15,27,45,0.04);
}
.target-icon {
  width: 58px;
  height: 58px;
  margin-bottom: 20px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}
.target-card h3 {
  color: var(--primary);
  font-size: 21px;
  font-weight: 750;
  margin-bottom: 12px;
  line-height: 1.35;
}
.target-card p {
  color: var(--gray-600);
  font-size: 15px;
  line-height: 1.75;
}
.scenario-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}
.scenario-header::before,
.scenario-header::after {
  content: '';
  height: 1px;
  background: var(--gray-200);
  flex: 1;
}
.scenario-header span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.scenario-card {
  min-height: 180px;
  padding: 32px 24px;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: all 0.3s;
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.08);
  border-color: rgba(232,168,56,0.45);
}
.scenario-card span {
  width: 64px;
  height: 64px;
  margin-bottom: 18px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(30,58,95,0.08), rgba(232,168,56,0.16));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
}
.scenario-card h3 {
  color: var(--primary);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
}
.scenario-card p {
  color: var(--gray-600);
  font-size: 14px;
  line-height: 1.7;
}

/* Global strengths */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.strength-card {
  padding: 30px;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  transition: all 0.3s;
}
.strength-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(0,0,0,0.08);
}
.strength-card h3 {
  color: var(--primary);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}
.strength-card p {
  color: var(--gray-600);
  line-height: 1.75;
  font-size: 15px;
}
.strength-card:nth-child(1),
.strength-card:nth-child(2) {
  grid-column: span 1;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-text p {
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.8;
}

/* Company History */
.history-block {
  margin-top: 56px;
  padding: 40px;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  border: 1px solid var(--gray-200);
  border-radius: 24px;
}
.history-header {
  max-width: 760px;
  margin: 0 auto 40px;
  text-align: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.history-header h3 {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
}
.history-header p {
  color: var(--gray-600);
  line-height: 1.8;
}
.timeline {
  position: relative;
  width: 100%;
  margin: 0;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 164px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), rgba(30,58,95,0.15));
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 56px;
  margin-bottom: 22px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-year {
  color: var(--primary);
  font-size: 18px;
  font-weight: 800;
  padding-top: 18px;
  text-align: right;
  white-space: nowrap;
}
.timeline-card {
  position: relative;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 22px 24px;
  box-shadow: 0 12px 30px rgba(15, 27, 45, 0.06);
}
.timeline-card::before {
  content: '';
  position: absolute;
  top: 22px;
  left: -43px;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: 4px solid white;
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(232,168,56,0.35);
}
.timeline-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.timeline-card p {
  color: var(--gray-600);
  font-size: 15px;
  line-height: 1.8;
}
.history-summary {
  max-width: 900px;
  margin: 36px auto 0;
  padding: 24px;
  background: var(--primary);
  color: white;
  border-radius: 18px;
  text-align: center;
}
.history-summary p {
  color: rgba(255,255,255,0.86);
  line-height: 1.8;
  margin-bottom: 12px;
}
.history-summary strong {
  color: var(--accent);
  font-size: 18px;
  letter-spacing: 0.04em;
}

/* Stats */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.stat-item {
  text-align: center;
  padding: 24px;
  background: white;
  border-radius: 12px;
  border: 1px solid var(--gray-200);
}
.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
}
.stat-label {
  font-size: 14px;
  color: var(--gray-600);
  margin-top: 4px;
}

/* Certifications */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.cert-card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  border: 1px solid var(--gray-200);
}
.cert-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent), #f0c060);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 12px;
}
.cert-card p {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-800);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
  outline: none;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
}
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-info-card {
  background: var(--primary);
  border-radius: 16px;
  padding: 40px;
  color: white;
}
.contact-info-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 32px;
}
.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}
.contact-info-icon {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-info-item .label {
  font-size: 13px;
  opacity: 0.7;
  margin-bottom: 4px;
}
.contact-info-item .value {
  font-size: 16px;
  font-weight: 500;
}

/* Footer */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.8);
  padding: 60px 24px 30px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}
.footer h4 {
  color: white;
  font-size: 16px;
  margin-bottom: 20px;
}
.footer p { font-size: 14px; line-height: 1.8; }
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 13px;
  opacity: 0.6;
  text-align: center;
}

/* Certificate Gallery */
.cert-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}
.cert-gallery-item {
  background: white;
  border-radius: 10px;
  padding: 12px;
  border: 1px solid var(--gray-200);
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
}
.cert-gallery-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}
.cert-gallery-item img {
  width: 100%;
  border-radius: 6px;
  margin-bottom: 8px;
}
.cert-gallery-item span {
  font-size: 12px;
  color: var(--gray-600);
  font-weight: 500;
  line-height: 1.4;
  display: block;
}

/* Certificate Modal */
.cert-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
  padding: 40px;
  cursor: pointer;
}
.cert-modal.open {
  display: flex;
}
.cert-modal img {
  max-width: 90%;
  max-height: 90vh;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.cert-modal-close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: white;
  font-size: 36px;
  cursor: pointer;
  font-weight: 300;
  line-height: 1;
}

/* Responsive */
@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  }
  .nav-links.open { display: flex; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 32px; }
  .hero-visual { display: none; }
  .products-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .business-grid { grid-template-columns: 1fr; }
  .target-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .strength-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .history-block { padding: 28px 20px; }
  .history-header h3 { font-size: 24px; }
  .timeline::before { left: 8px; }
  .timeline-item { grid-template-columns: 1fr; gap: 10px; padding-left: 30px; }
  .timeline-year { text-align: left; padding-top: 0; }
  .timeline-card::before { left: -29px; top: 24px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .lang-switcher { margin-top: 12px; }
}