:root {
  --primary: #1e3a5f;
  --primary-light: #2d4a73;
  --primary-dark: #152942;
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #f8fafc;
  --bg-dark: #0f172a;
  --card: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --radius: 0.75rem;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.625rem 1.25rem; border-radius: var(--radius); font-weight: 600; transition: all 0.2s; border: none; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }
.btn-warning { background: var(--accent); color: #1f2937; }
.btn-warning:hover { background: var(--accent-hover); color: #fff; }
.btn-outline { background: transparent; border: 1px solid currentColor; }
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.btn-lg { padding: 0.875rem 1.75rem; font-size: 1rem; }

.section-header { text-align: center; max-width: 768px; margin: 0 auto 4rem; }
.section-header.light { color: #fff; }
.section-tag { display: inline-block; padding: 0.375rem 1rem; border-radius: 999px; background: #e2e8f0; color: var(--primary); font-size: 0.875rem; font-weight: 500; margin-bottom: 1rem; }
.section-tag.light { background: rgba(255,255,255,0.15); color: #fff; }
.section-header h2 { font-size: 2.25rem; font-weight: 800; margin-bottom: 1rem; letter-spacing: -0.025em; }
.section-header p { font-size: 1.125rem; color: var(--text-light); }
.section-header.light p { color: rgba(255,255,255,0.8); }

/* Header */
.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon { width: 42px; height: 42px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; display: flex; align-items: center; justify-content: center; border-radius: 0.5rem; font-size: 1.25rem; font-weight: 800; }
.logo-text { display: flex; flex-direction: column; }
.logo-title { font-size: 1.125rem; font-weight: 800; color: var(--text); line-height: 1.2; }
.logo-sub { font-size: 0.75rem; color: var(--text-light); }
.nav { display: flex; gap: 2rem; }
.nav a { font-size: 0.9375rem; font-weight: 500; color: var(--text-light); transition: color 0.2s; }
.nav a:hover { color: var(--primary); }
.header-right { display: flex; align-items: center; gap: 1rem; }
.header-phone { font-weight: 700; color: var(--primary); font-size: 1rem; }
.menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text); }

/* Hero */
.hero { position: relative; min-height: 720px; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: center center; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,30,55,0.95) 0%, rgba(30,58,95,0.9) 50%, rgba(15,30,55,0.85) 100%); }
.hero-content { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 380px; gap: 4rem; align-items: center; padding-top: 4rem; padding-bottom: 4rem; }
.hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem; border-radius: 999px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); font-size: 0.875rem; margin-bottom: 1.5rem; }
.pulse { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; position: relative; }
.pulse::after { content: ''; position: absolute; inset: -4px; border-radius: 50%; background: var(--accent); opacity: 0.4; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { transform: scale(1); opacity: 0.4; } 50% { transform: scale(1.5); opacity: 0; } }
.hero h1 { font-size: 3.5rem; font-weight: 900; line-height: 1.1; margin-bottom: 1.5rem; letter-spacing: -0.03em; }
.text-orange { color: var(--accent); }
.hero-desc { font-size: 1.25rem; color: rgba(255,255,255,0.85); max-width: 600px; margin-bottom: 2rem; }
.hero-btns { display: flex; gap: 1rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.hero-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.hero-feature { display: flex; align-items: center; gap: 0.5rem; color: rgba(255,255,255,0.9); font-weight: 500; }
.hero-feature span { color: var(--accent); font-weight: 700; }
.hero-card { background: rgba(255,255,255,0.1); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.2); border-radius: 1rem; padding: 2rem; }
.hero-card h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.hero-card-item { padding: 1rem 0; border-bottom: 1px solid rgba(255,255,255,0.15); }
.hero-card-item:last-child { border-bottom: none; }
.hero-card-item strong { display: block; font-size: 0.875rem; color: rgba(255,255,255,0.7); margin-bottom: 0.25rem; }
.hero-card-item p { color: #fff; font-weight: 600; }

/* Services */
.services { padding: 6rem 0; background: var(--bg); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; align-items: stretch; }
.service-card { background: var(--card); border-radius: 1rem; overflow: hidden; box-shadow: var(--shadow); transition: transform 0.3s, box-shadow 0.3s; border: 1px solid var(--border); display: flex; flex-direction: column; }
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.service-img { position: relative; width: 100%; padding-bottom: 75%; height: 0; overflow: hidden; background: #f1f5f9; border-bottom: 1px solid var(--border); }
.service-img img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; transition: transform 0.5s; }
.service-card:hover .service-img img { transform: scale(1.05); }
.service-body { padding: 1.75rem; flex: 1; display: flex; flex-direction: column; }
.service-icon { width: 48px; height: 48px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: 0.75rem; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 1rem; }
.service-body h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
.service-body p { color: var(--text-light); font-size: 0.9375rem; margin-bottom: 1.25rem; line-height: 1.7; }
.service-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: auto; }
.service-tags span { padding: 0.25rem 0.75rem; background: #f1f5f9; color: var(--primary); border-radius: 999px; font-size: 0.75rem; font-weight: 600; }

/* Keywords */
.keywords { padding: 6rem 0; background: #f1f5f9; }
.keyword-block { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; margin-bottom: 5rem; }
.keyword-block.reverse .keyword-img { order: 2; }
.keyword-block.reverse .keyword-text { order: 1; }
.keyword-img { position: relative; width: 100%; padding-bottom: 75%; height: 0; overflow: hidden; border-radius: 1rem; box-shadow: var(--shadow-lg); background: #f1f5f9; border: 1px solid var(--border); }
.keyword-img img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.keyword-text h3 { font-size: 2rem; font-weight: 800; margin-bottom: 0.5rem; }
.keyword-subtitle { color: var(--accent-hover); font-weight: 700; font-size: 1.125rem; margin-bottom: 1.25rem; }
.keyword-text p { color: var(--text-light); margin-bottom: 1rem; line-height: 1.8; }
.keyword-text ul { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; margin-top: 1.5rem; }
.keyword-text li { position: relative; padding-left: 1.5rem; font-weight: 500; }
.keyword-text li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* Process */
.process { padding: 6rem 0; background: var(--bg); }
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.process-card { background: var(--card); border-radius: 1rem; padding: 2rem; box-shadow: var(--shadow); border: 1px solid var(--border); position: relative; transition: transform 0.3s; }
.process-card:hover { transform: translateY(-4px); }
.process-num { position: absolute; top: -12px; left: 1.5rem; width: 32px; height: 32px; background: var(--accent); color: #1f2937; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.875rem; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.process-icon { font-size: 2rem; margin: 0.5rem 0 1rem; }
.process-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
.process-card p { color: var(--text-light); font-size: 0.9375rem; }

/* Why Us */
.why-us { padding: 6rem 0; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.why-card { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); border-radius: 1rem; padding: 2rem; transition: background 0.3s; }
.why-card:hover { background: rgba(255,255,255,0.12); }
.why-icon { width: 52px; height: 52px; background: var(--accent); border-radius: 0.75rem; display: flex; align-items: center; justify-content: center; font-size: 1.75rem; margin-bottom: 1.25rem; }
.why-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
.why-card p { color: rgba(255,255,255,0.8); font-size: 0.9375rem; line-height: 1.7; }

/* Stats */
.stats { padding: 4rem 0; background: #f1f5f9; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.stat-item { text-align: center; }
.stat-icon { width: 56px; height: 56px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: 1rem; display: flex; align-items: center; justify-content: center; font-size: 1.75rem; margin: 0 auto 1rem; }
.stat-value { font-size: 2.5rem; font-weight: 900; color: var(--text); margin-bottom: 0.25rem; }
.stat-label { color: var(--text-light); font-size: 0.9375rem; }

/* Contact */
.contact { padding: 6rem 0; background: var(--bg); }
.contact-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
.contact-card { background: var(--card); border-radius: 1rem; padding: 2.5rem; box-shadow: var(--shadow); border: 1px solid var(--border); }
.contact-card h3 { font-size: 1.75rem; font-weight: 800; margin-bottom: 1.5rem; }
.contact-items { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; margin-bottom: 2rem; }
.contact-item { padding: 1.25rem; background: #f8fafc; border-radius: 0.75rem; }
.contact-item strong { display: block; font-size: 0.875rem; color: var(--text-light); margin-bottom: 0.5rem; }
.contact-item a, .contact-item p { font-size: 1.25rem; font-weight: 700; color: var(--text); }
.contact-item a { color: var(--primary); }
.contact-btns { display: flex; gap: 1rem; flex-wrap: wrap; }
.contact-card.dark { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; }
.contact-list { margin-bottom: 1.5rem; }
.contact-list li { padding: 0.75rem 0; border-bottom: 1px solid rgba(255,255,255,0.15); }
.contact-list li:last-child { border-bottom: none; }
.contact-tip { background: rgba(255,255,255,0.1); border-radius: 0.75rem; padding: 1.25rem; }
.contact-tip strong { display: block; margin-bottom: 0.5rem; }
.contact-tip p { color: rgba(255,255,255,0.85); font-size: 0.9375rem; }

/* Footer */
.footer { padding: 4rem 0 2rem; background: #f1f5f9; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-logo { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.footer-logo-icon { width: 42px; height: 42px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; display: flex; align-items: center; justify-content: center; border-radius: 0.5rem; font-size: 1.25rem; font-weight: 800; }
.footer-logo div { display: flex; flex-direction: column; }
.footer-logo strong { color: var(--text); font-size: 1.0625rem; }
.footer-logo span { color: var(--text-light); font-size: 0.75rem; }
.footer-brand p { color: var(--text-light); margin-bottom: 0.75rem; line-height: 1.7; }
.footer-brand a { color: var(--primary); font-weight: 700; }
.footer-links h4 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 1.25rem; color: var(--text); }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { color: var(--text-light); transition: color 0.2s; }
.footer-links a:hover { color: var(--primary); }
.footer-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.footer-tags span { padding: 0.375rem 0.75rem; background: #fff; border: 1px solid var(--border); border-radius: 999px; font-size: 0.8125rem; color: var(--text-light); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 2rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; color: var(--text-light); font-size: 0.875rem; }

/* Mobile */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-card { display: none; }
  .services-grid, .process-grid, .why-grid { grid-template-columns: repeat(2, 1fr); }
  .keyword-block, .keyword-block.reverse { grid-template-columns: 1fr; gap: 2rem; }
  .keyword-block.reverse .keyword-img, .keyword-block.reverse .keyword-text { order: unset; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 1rem 1.5rem; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); }
  .nav.active { display: flex; }
  .nav a { padding: 0.75rem 0; }
  .header-right { display: none; }
  .menu-toggle { display: block; }
  .hero { min-height: auto; }
  .hero h1 { font-size: 2.25rem; }
  .hero-desc { font-size: 1rem; }
  .hero-features { grid-template-columns: 1fr; }
  .services-grid, .process-grid, .why-grid, .stats-grid { grid-template-columns: 1fr; }
  .keyword-text ul { grid-template-columns: 1fr; }
  .contact-items { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section-header h2 { font-size: 1.75rem; }
  .btn-lg { width: 100%; }
}