/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  color: #333; line-height: 1.6; background: #fff;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(255,255,255,0.97); backdrop-filter: blur(8px);
  box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo-wrap { display: flex; align-items: center; gap: 10px; }
.logo-wrap img { height: 40px; width: auto; }
.logo-text { font-size: 20px; font-weight: 700; color: #c0392b; }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 15px; font-weight: 500; color: #555;
  transition: color 0.25s; position: relative;
}
.nav-links a:hover, .nav-links a.active { color: #c0392b; }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: #c0392b; border-radius: 1px;
}
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-tel { font-size: 15px; font-weight: 600; color: #c0392b; }
.btn-primary {
  display: inline-block; padding: 10px 28px; border-radius: 6px;
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  color: #fff !important; font-size: 15px; font-weight: 600;
  border: none; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 15px rgba(192,57,43,0.3); }
.btn-outline {
  display: inline-block; padding: 10px 28px; border-radius: 6px;
  border: 2px solid #c0392b; color: #c0392b; font-size: 15px; font-weight: 600;
  background: transparent; cursor: pointer; transition: all 0.25s;
}
.btn-outline:hover { background: #c0392b; color: #fff; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.nav-toggle span { width: 24px; height: 2.5px; background: #333; border-radius: 2px; transition: all 0.25s; }
.hero {
  min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  position: relative; overflow: hidden; padding-top: 72px;
}
.hero-bg-img {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center; opacity: 0.35;
}
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.4); }
.hero-content { position: relative; z-index: 2; text-align: center; color: #fff; padding: 60px 0; }
.hero-content h1 {
  font-size: clamp(36px, 6vw, 64px); font-weight: 800;
  margin-bottom: 8px; letter-spacing: 2px;
}
.hero-content .subtitle {
  font-size: clamp(18px, 3vw, 28px); font-weight: 300;
  margin-bottom: 16px; color: rgba(255,255,255,0.85);
}
.hero-content .slogan {
  font-size: clamp(16px, 2vw, 22px); font-weight: 400;
  margin-bottom: 40px; color: rgba(255,255,255,0.7);
  max-width: 700px; margin-left: auto; margin-right: auto;
}
.hero-content .btn-primary { font-size: 18px; padding: 14px 42px; }
.hero-badge {
  display: inline-block; padding: 6px 18px; border-radius: 20px;
  background: rgba(231,76,60,0.25); color: #ff8a80;
  font-size: 14px; font-weight: 500; margin-bottom: 20px; border: 1px solid rgba(231,76,60,0.3);
}
.section { padding: 90px 0; }
.section-title {
  text-align: center; font-size: clamp(26px, 3.5vw, 36px); font-weight: 700;
  margin-bottom: 12px; color: #222;
}
.section-desc {
  text-align: center; font-size: 16px; color: #888;
  max-width: 600px; margin: 0 auto 52px; line-height: 1.7;
}
.section-bg { background: #f9f8f6; }
.stats { padding: 70px 0; background: #c0392b; color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; text-align: center; }
.stat-item .num { font-size: clamp(32px,4vw,48px); font-weight: 800; }
.stat-item .label { font-size: 15px; opacity: 0.85; margin-top: 6px; }
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.intro-text h2 { font-size: 28px; font-weight: 700; margin-bottom: 16px; color: #222; }
.intro-text p { font-size: 15.5px; color: #666; margin-bottom: 12px; line-height: 1.8; }
.intro-text .highlight { color: #c0392b; font-weight: 600; }
.intro-img { border-radius: 12px; overflow: hidden; box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
.intro-img img { width: 100%; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 24px; }
.product-card {
  background: #fff; border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06); transition: transform 0.3s, box-shadow 0.3s;
  text-align: center;
}
.product-card:hover { transform: translateY(-4px); box-shadow: 0 8px 25px rgba(0,0,0,0.1); }
.product-card .img-wrap { height: 180px; overflow: hidden; background: #f5f0eb; }
.product-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.product-card h3 { font-size: 16px; font-weight: 600; margin: 14px 0 6px; color: #333; }
.product-card p { font-size: 13.5px; color: #999; padding: 0 12px 16px; }
.features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
.feature-card {
  background: #fff; border-radius: 12px; padding: 36px 24px;
  text-align: center; box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  transition: transform 0.3s;
}
.feature-card:hover { transform: translateY(-3px); }
.feature-icon {
  width: 60px; height: 60px; border-radius: 50%; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 700; color: #fff;
}
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: #333; }
.feature-card p { font-size: 14px; color: #888; line-height: 1.7; }
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 2px; background: #e0d5ce; transform: translateX(-50%);
}
.timeline-item { display: flex; align-items: flex-start; margin-bottom: 40px; position: relative; }
.timeline-item:nth-child(odd) { flex-direction: row-reverse; }
.timeline-item .year { flex: 0 0 120px; text-align: center; font-size: 20px; font-weight: 800; color: #c0392b; padding-top: 4px; }
.timeline-item .content { flex: 1; background: #fff; border-radius: 10px; padding: 20px 24px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); margin: 0 30px; }
.timeline-item .content h4 { font-size: 16px; font-weight: 600; margin-bottom: 6px; color: #333; }
.timeline-item .content p { font-size: 14px; color: #777; line-height: 1.6; }
.timeline-dot { position: absolute; left: 50%; top: 8px; width: 14px; height: 14px; background: #c0392b; border-radius: 50%; transform: translateX(-50%); border: 3px solid #fff; box-shadow: 0 0 0 2px #c0392b; }
.testimonial-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.testimonial-card { background: #fff; border-radius: 12px; padding: 28px; box-shadow: 0 2px 12px rgba(0,0,0,0.05); }
.testimonial-card .stars { color: #f39c12; font-size: 18px; margin-bottom: 10px; }
.testimonial-card p { font-size: 14px; color: #666; line-height: 1.7; font-style: italic; }
.testimonial-card .author { font-weight: 600; color: #333; margin-top: 12px; }
.cta-banner { background: linear-gradient(135deg, #c0392b, #e74c3c); color: #fff; text-align: center; padding: 70px 0; }
.cta-banner h2 { font-size: clamp(24px,3.5vw,34px); font-weight: 700; margin-bottom: 12px; }
.cta-banner p { font-size: 16px; opacity: 0.9; margin-bottom: 30px; }
.cta-banner .btn-outline { border-color: #fff; color: #fff; }
.cta-banner .btn-outline:hover { background: #fff; color: #c0392b; }
.cta-form { max-width: 500px; margin: 20px auto 0; display: flex; gap: 12px; }
.cta-form input { flex: 1; padding: 12px 16px; border-radius: 6px; border: none; font-size: 15px; outline: none; }
.cta-form .btn-primary { background: #222; }
.cta-form .btn-primary:hover { background: #000; }
.values-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.value-card { text-align: center; padding: 32px 20px; background: #fff; border-radius: 12px; box-shadow: 0 2px 10px rgba(0,0,0,0.04); }
.value-card .icon { font-size: 36px; margin-bottom: 12px; }
.value-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; color: #333; }
.value-card p { font-size: 14px; color: #888; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info h3 { font-size: 22px; font-weight: 600; margin-bottom: 20px; color: #333; }
.contact-item { display: flex; gap: 14px; margin-bottom: 20px; align-items: flex-start; }
.contact-item .icon { font-size: 22px; flex-shrink: 0; width: 24px; text-align: center; }
.contact-item .text { font-size: 15px; color: #666; }
.contact-item .text strong { color: #333; display: block; margin-bottom: 2px; }
.footer { background: #1a1a2e; color: rgba(255,255,255,0.7); padding: 50px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
.footer-brand img { height: 36px; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 300px; }
.footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.footer ul li { margin-bottom: 8px; }
.footer ul li a { font-size: 14px; transition: color 0.2s; }
.footer ul li a:hover { color: #e74c3c; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; font-size: 13px; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #e74c3c; }
.footer .powered { margin-top: 4px; font-size: 12px; color: rgba(255,255,255,0.35); }
.footer .powered a { color: rgba(255,255,255,0.5); }
.footer .powered a:hover { color: #e74c3c; }
.page-header { padding: 140px 0 70px; text-align: center; background: linear-gradient(135deg, #1a1a2e, #16213e); color: #fff; }
.page-header h1 { font-size: clamp(30px,4vw,42px); font-weight: 700; margin-bottom: 8px; }
.page-header p { font-size: 16px; opacity: 0.75; }
.back-top { position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px; background: #c0392b; color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; cursor: pointer; opacity: 0; visibility: hidden; transition: all 0.3s; box-shadow: 0 2px 10px rgba(192,57,43,0.3); z-index: 999; }
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-2px); }
.honor-list { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 30px; }
.honor-badge { background: #fff; border: 1px solid #e8e0d8; border-radius: 8px; padding: 14px 22px; font-size: 14px; font-weight: 600; color: #c0392b; }
.honor-badge span { display: block; font-weight: 400; color: #888; font-size: 12px; margin-top: 2px; }
.detail-list li { padding: 10px 0; border-bottom: 1px solid #f0ebe5; display: flex; gap: 10px; }
.detail-list li::before { content: '\2713'; color: #c0392b; font-weight: 700; }
.process-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 20px; }
.process-step { text-align: center; padding: 24px 16px; }
.process-step .step-num { width: 44px; height: 44px; border-radius: 50%; background: #c0392b; color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700; margin: 0 auto 12px; }
.process-step h4 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.process-step p { font-size: 13.5px; color: #888; }
.faq-item { border-bottom: 1px solid #eee; padding: 18px 0; }
.faq-item .q { font-weight: 600; color: #333; cursor: pointer; font-size: 15px; }
.faq-item .a { font-size: 14px; color: #777; margin-top: 8px; display: none; }
.faq-item.open .a { display: block; }
@media (max-width: 968px) {
  .intro-grid, .contact-grid { grid-template-columns: 1fr; }
  .features-grid, .values-grid { grid-template-columns: 1fr 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2,1fr); gap: 30px; }
  .timeline::before { left: 20px; }
  .timeline-item, .timeline-item:nth-child(odd) { flex-direction: row; }
  .timeline-item .year { flex: 0 0 80px; text-align: left; padding-left: 44px; }
  .timeline-item .content { margin: 0 0 0 10px; }
  .timeline-dot { left: 20px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: #fff; padding: 16px 20px; box-shadow: 0 4px 12px rgba(0,0,0,0.08); gap: 16px; }
  .features-grid, .values-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2,1fr); }
  .cta-form { flex-direction: column; }
}