:root {
  --color-primary: #059669;
  --color-primary-light: #10b981;
  --color-primary-dark: #047857;
  --color-secondary: #0ea5e9;
  --color-secondary-blue: #3b82f6;
  --color-accent: #34d399;
  --color-bg: #ffffff;
  --color-bg-alt: #f0fdf4;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #334155;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --font-sans: 'Inter', 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --max-width: 1400px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1), 0 16px 48px rgba(0,0,0,0.08);
  --transition: 0.3s ease-out;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul, ol { list-style: none; }

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

.section-padding { padding: 100px 0; }

.section-header { text-align: center; max-width: 640px; margin: 0 auto 64px; }
.section-tag {
  display: inline-block; font-size: 13px; font-weight: 600; color: var(--color-primary);
  text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 16px;
  padding: 6px 16px; background: rgba(5,150,105,0.08); border-radius: 20px;
}
.section-tag-light { color: #a7f3d0; background: rgba(255,255,255,0.15); }
.section-title {
  font-size: 36px; font-weight: 700; line-height: 1.25; color: var(--color-text); margin-bottom: 16px;
}
.section-title-light { color: #ffffff; }
.section-desc { font-size: 17px; color: var(--color-muted); line-height: 1.7; }
.section-desc-light { color: rgba(255,255,255,0.8); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
  font-size: 15px; font-weight: 600; border-radius: var(--radius-sm);
  transition: all var(--transition); cursor: pointer; border: none; font-family: inherit;
}
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 4px 16px rgba(5,150,105,0.3); }
.btn-secondary { background: transparent; color: #ffffff; border: 1.5px solid #ffffff; }
.btn-secondary:hover { background: rgba(255,255,255,0.15); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--color-primary); }
.btn-white:hover { background: #f0fdf4; transform: translateY(-2px); box-shadow: 0 4px 16px rgba(255,255,255,0.3); }
.btn svg { transition: transform var(--transition); }
.btn:hover svg { transform: translateX(4px); }

.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--color-primary); transition: all var(--transition);
}
.card-link:hover { gap: 10px; }
.card-link svg { transition: transform var(--transition); }
.card-link:hover svg { transform: translateX(4px); }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0; transition: all var(--transition); background: transparent;
}
.site-header.scrolled {
  background: rgba(255,255,255,0.96); backdrop-filter: blur(12px);
  box-shadow: 0 1px 8px rgba(0,0,0,0.06); padding: 10px 0;
}
.site-header--dark { background: transparent; backdrop-filter: none; }
.site-header--dark .logo-text { color: #ffffff; }
.site-header--dark .logo-icon circle:first-child { stroke: #ffffff; }
.site-header--dark .logo-icon circle:nth-child(2) { fill: #ffffff; }
.site-header--dark .logo-icon line { stroke: #ffffff; }
.site-header--dark .nav-link { color: rgba(255,255,255,0.85); }
.site-header--dark .nav-link:hover, .site-header--dark .nav-link.active { color: #ffffff; }
.site-header--dark .nav-link::after { background: #ffffff; }
.site-header--dark .header-cta { border-color: rgba(255,255,255,0.5); color: #ffffff; }
.site-header--dark .header-cta:hover { background: #ffffff; color: var(--color-primary); }
.site-header--dark .mobile-toggle span { background: #ffffff; }
.site-header--dark.scrolled { background: rgba(255,255,255,0.96); }
.site-header--dark.scrolled .logo-text { color: var(--color-text); }
.site-header--dark.scrolled .logo-icon circle:first-child { stroke: var(--color-primary); }
.site-header--dark.scrolled .logo-icon circle:nth-child(2) { fill: var(--color-primary); }
.site-header--dark.scrolled .logo-icon line { stroke: var(--color-primary); }
.site-header--dark.scrolled .nav-link { color: var(--color-text-secondary); }
.site-header--dark.scrolled .nav-link:hover, .site-header--dark.scrolled .nav-link.active { color: var(--color-primary); }
.site-header--dark.scrolled .nav-link::after { background: var(--color-primary); }
.site-header--dark.scrolled .header-cta { border-color: var(--color-primary); color: var(--color-primary); }
.site-header--dark.scrolled .header-cta:hover { background: var(--color-primary); color: #ffffff; }
.site-header--dark.scrolled .mobile-toggle span { background: var(--color-text); }
.header-inner { display: flex; align-items: center; justify-content: space-between; }

.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { flex-shrink: 0; }
.logo-text { font-size: 18px; font-weight: 700; color: var(--color-text); white-space: nowrap; }

.main-nav { display: flex; align-items: center; gap: 36px; }
.nav-link {
  font-size: 15px; font-weight: 500; color: var(--color-text-secondary);
  transition: color var(--transition); position: relative; padding: 4px 0;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
  background: var(--color-primary); transition: width var(--transition); border-radius: 1px;
}
.nav-link:hover, .nav-link.active { color: var(--color-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.header-cta {
  padding: 8px 24px; border: 1.5px solid var(--color-primary); border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; color: var(--color-primary); transition: all var(--transition);
}
.header-cta:hover { background: var(--color-primary); color: #fff; }

.mobile-toggle {
  display: none; flex-direction: column; gap: 5px; background: none;
  border: none; cursor: pointer; padding: 4px; width: 36px;
}
.mobile-toggle span {
  display: block; width: 22px; height: 2px; background: var(--color-text);
  transition: all var(--transition); border-radius: 1px;
}
.mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-nav-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  z-index: 999; opacity: 0; transition: opacity var(--transition);
}
.mobile-nav-overlay.active { opacity: 1; }

.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  justify-content: center; overflow: hidden;
  background: url('../images/banner.jpg') center/cover no-repeat;
}
.hero::before {
  content: ''; position: absolute; inset: 0; z-index: 0;
  background: rgba(0,0,0,0.5);
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 2; }
.hero-grid-bg {
  position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(rgba(5,150,105,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(5,150,105,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-glow {
  position: absolute; width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(5,150,105,0.08) 0%, transparent 70%);
  top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 1;
}
.hero-inner { position: relative; z-index: 3; text-align: center; padding: 120px 0 80px; }
.hero-content { max-width: 760px; margin: 0 auto; }
.hero-title {
  font-size: 52px; font-weight: 800; line-height: 1.2; color: #ffffff;
  margin-bottom: 24px; letter-spacing: -0.5px;
}
.hero-subtitle { font-size: 18px; line-height: 1.75; color: rgba(255,255,255,0.9); margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  z-index: 3; display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: rgba(255,255,255,0.7); font-size: 12px; animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

.services { background: var(--color-bg); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.service-card {
  background: var(--color-surface); border-radius: var(--radius-lg); padding: 40px 32px;
  box-shadow: var(--shadow-sm); transition: all var(--transition);
  border: 1px solid var(--color-border); position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  opacity: 0; transition: opacity var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(5,150,105,0.2); }
.service-card:hover::before { opacity: 1; }
.service-icon {
  width: 72px; height: 72px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(5,150,105,0.08), rgba(16,185,129,0.04));
  display: flex; align-items: center; justify-content: center; margin-bottom: 24px;
}
.service-card-title { font-size: 20px; font-weight: 700; color: var(--color-text); margin-bottom: 12px; }
.service-card-desc { font-size: 15px; font-weight: 500; color: var(--color-primary); margin-bottom: 12px; line-height: 1.5; }
.service-card-detail { font-size: 14px; color: var(--color-muted); line-height: 1.7; margin-bottom: 20px; }

.stats {
  position: relative; padding: 100px 0; overflow: hidden;
  background: linear-gradient(135deg, #059669 0%, #047857 50%, #065f46 100%);
}
.stats-bg-pattern {
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.05) 0%, transparent 50%),
                    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.03) 0%, transparent 50%);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 1; }
.stat-item { text-align: center; }
.stat-number-wrap { margin-bottom: 12px; }
.stat-number {
  font-size: 56px; font-weight: 800; color: #ffffff; line-height: 1;
  font-family: 'Space Grotesk', var(--font-sans);
}
.stat-label { font-size: 16px; font-weight: 600; color: #a7f3d0; margin-bottom: 8px; }
.stat-desc { font-size: 14px; color: rgba(255,255,255,0.7); line-height: 1.6; }

.advantages { background: var(--color-bg-alt); }
.advantage-row { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 80px; }
.advantage-row:last-of-type { margin-bottom: 0; }
.advantage-row-reverse { direction: rtl; }
.advantage-row-reverse > * { direction: ltr; }
.advantage-illustration {
  background: var(--color-surface); border-radius: var(--radius-lg); padding: 32px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--color-border);
}
.advantage-illustration svg, .advantage-illustration img { width: 100%; height: 400px; object-fit: cover; border-radius: var(--radius-md); }
.advantage-title { font-size: 24px; font-weight: 700; color: var(--color-text); margin-bottom: 16px; }
.advantage-text { font-size: 15px; color: var(--color-muted); line-height: 1.75; margin-bottom: 20px; }
.advantage-list { display: flex; flex-direction: column; gap: 10px; }
.advantage-list li {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 500; color: var(--color-text-secondary);
}
.advantage-list li::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-primary); flex-shrink: 0;
}

.solutions { background: var(--color-bg); }
.solutions-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.solution-card {
  border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface);
  box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); transition: all var(--transition);
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.solution-img { overflow: hidden; aspect-ratio: 16/9; }
.solution-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.solution-card:hover .solution-img img { transform: scale(1.05); }
.solution-body { padding: 28px; }
.solution-card-title { font-size: 18px; font-weight: 700; color: var(--color-text); margin-bottom: 10px; }
.solution-card-desc { font-size: 14px; color: var(--color-muted); line-height: 1.7; }
.solutions-cta { text-align: center; margin-top: 48px; }

.process { background: var(--color-bg-alt); }
.process-steps { display: flex; align-items: flex-start; justify-content: space-between; gap: 0; }
.process-step { flex: 1; text-align: center; padding: 0 16px; }
.process-step-num {
  font-size: 40px; font-weight: 800; color: var(--color-primary); opacity: 0.2;
  margin-bottom: 16px; font-family: 'Space Grotesk', var(--font-sans); line-height: 1;
}
.process-step-title { font-size: 18px; font-weight: 700; color: var(--color-text); margin-bottom: 10px; }
.process-step-desc { font-size: 14px; color: var(--color-muted); line-height: 1.7; }
.process-connector { display: flex; align-items: center; padding-top: 18px; flex-shrink: 0; }
.process-cta { text-align: center; margin-top: 56px; }

.news { background: var(--color-bg); }
.news-grid { min-height: 300px; }
.news-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card {
  border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface);
  box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); transition: all var(--transition);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-card-img { overflow: hidden; aspect-ratio: 16/9; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .news-card-img img { transform: scale(1.05); }
.news-card-body { padding: 24px; }
.news-card-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.news-card-date { font-size: 13px; color: var(--color-muted); }
.news-card-category {
  font-size: 12px; font-weight: 600; color: var(--color-primary);
  padding: 2px 10px; background: rgba(5,150,105,0.08); border-radius: 10px;
}
.news-card-title { font-size: 17px; font-weight: 700; color: var(--color-text); margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card-summary { font-size: 14px; color: var(--color-muted); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-more { text-align: center; margin-top: 48px; }

.news-skeleton { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.skeleton-card { border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface); border: 1px solid var(--color-border); }
.skeleton-img { aspect-ratio: 16/9; background: linear-gradient(90deg, #f1f5f9 25%, #e8edf2 50%, #f1f5f9 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; }
.skeleton-body { padding: 24px; }
.skeleton-line { height: 14px; border-radius: 7px; background: linear-gradient(90deg, #f1f5f9 25%, #e8edf2 50%, #f1f5f9 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; margin-bottom: 12px; }
.skeleton-line.w60 { width: 60%; }
.skeleton-line.w80 { width: 80%; }
.skeleton-line.w100 { width: 100%; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.final-cta { position: relative; padding: 100px 0; overflow: hidden; background: var(--color-bg); }
.final-cta-bg {
  position: absolute; inset: 24px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #059669 0%, #047857 60%, #065f46 100%);
}
.final-cta-bg::before {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius-lg);
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
}
.final-cta-inner { position: relative; z-index: 1; }
.final-cta-content { text-align: center; max-width: 640px; margin: 0 auto; }
.final-cta-title { font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.final-cta-desc { font-size: 17px; color: rgba(255,255,255,0.85); line-height: 1.7; margin-bottom: 36px; }
.final-cta-actions { display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; }
.final-cta-phone { display: inline-flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.9); font-size: 18px; font-weight: 600; transition: color var(--transition); }
.final-cta-phone:hover { color: #fff; }

.site-footer { background: #0f172a; color: #94a3b8; padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-text { color: #e2e8f0; }
.footer-desc { font-size: 14px; line-height: 1.7; color: #94a3b8; }
.footer-heading { font-size: 15px; font-weight: 600; color: #e2e8f0; margin-bottom: 20px; }
.footer-links-group nav, .footer-links-group > div { display: flex; flex-direction: column; gap: 12px; }
.footer-link { font-size: 14px; color: #94a3b8; transition: color var(--transition); }
.footer-link:hover { color: var(--color-primary-light); }
.footer-contact-list { display: flex; flex-direction: column; gap: 14px; }
.footer-contact-item { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: #94a3b8; }
.footer-contact-item svg { flex-shrink: 0; margin-top: 2px; }
.footer-contact-item a { color: #94a3b8; transition: color var(--transition); }
.footer-contact-item a:hover { color: var(--color-primary-light); }
.footer-bottom { padding: 24px 0; text-align: center; font-size: 13px; color: #64748b; }

.reveal-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease-out, transform 0.7s ease-out; }
.reveal-up.revealed { opacity: 1; transform: translateY(0); }

@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .advantage-row { grid-template-columns: 1fr; gap: 32px; }
  .advantage-row-reverse { direction: ltr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .process-connector { display: none; }
  .process-steps { flex-wrap: wrap; justify-content: center; }
  .process-step { flex: 0 0 calc(50% - 16px); }
}

@media (max-width: 768px) {
  .section-padding { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
  .section-title { font-size: 28px; }
  .section-desc { font-size: 15px; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .hero-inner { padding: 100px 0 60px; }
  .hero-scroll-hint { display: none; }
  .main-nav {
    position: fixed; top: 0; right: -100%; width: 280px; height: 100vh;
    background: #fff; flex-direction: column; padding: 80px 32px 32px; gap: 0;
    box-shadow: -4px 0 24px rgba(0,0,0,0.1); transition: right var(--transition); z-index: 1001;
  }
  .main-nav.active { right: 0; }
  .nav-link { padding: 14px 0; font-size: 16px; border-bottom: 1px solid var(--color-border); width: 100%; }
  .nav-link::after { display: none; }
  .header-cta { display: none; }
  .mobile-toggle { display: flex; }
  .mobile-nav-overlay { display: block; }
  .services-grid, .solutions-grid, .news-cards, .news-skeleton { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .stat-number { font-size: 40px; }
  .process-step { flex: 0 0 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .final-cta-bg { inset: 16px; }
  .final-cta-title { font-size: 28px; }
  .final-cta-desc { font-size: 15px; }
  .final-cta-actions { flex-direction: column; gap: 16px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-lg { width: 100%; max-width: 280px; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal-up { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}