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

:root {
  --primary: #1a3a5c;
  --primary-dark: #0f2440;
  --primary-light: #2c5680;
  --accent: #c8a44e;
  --accent-light: #e0c878;
  --text: #333;
  --text-light: #666;
  --bg: #fff;
  --bg-alt: #f5f6f8;
  --bg-dark: #1a1a2e;
  --white: #fff;
  --border: #e0e0e0;
  --radius: 8px;
  
  --fn-bg: #fff; --fn-color: #555; --fn-border: #eee;
  --fn-hover: #f0f2f5; --fn-active: #e4e7eb; --fn-accent: #1a3a5c;
  --fn-arrow: #999; --fn-arrow-bg: #f8f9fa;
  --fn-shadow: -2px 2px 24px rgba(0,0,0,0.18);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --transition: 0.3s ease;
  --max-width: 1200px;
  --header-height: 72px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-height);
  background: rgba(255,255,255,0.97); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000; display: flex; align-items: center;
  transition: var(--transition);
}
.header.scrolled { box-shadow: var(--shadow); }

.header-inner {
  width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}

.logo {
  display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem;
  color: var(--primary); letter-spacing: 1px;
}
.logo-icon { width: 40px; height: 40px; background: var(--primary); border-radius: 6px;
  display: flex; align-items: center; justify-content: center; color: var(--white);
  font-size: 1.1rem; font-weight: 800; flex-shrink: 0;
}

.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a {
  font-size: 0.95rem; color: var(--text-light); font-weight: 500;
  transition: var(--transition); position: relative; padding: 4px 0;
}
.main-nav a::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 2px;
  background: var(--accent); transform: scaleX(0); transition: transform 0.3s;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 12px; }

.lang-switch { display: flex; border: 1px solid var(--border); border-radius: 20px; overflow: hidden; }
.lang-btn {
  padding: 6px 14px; font-size: 0.8rem; cursor: pointer; background: transparent; border: none;
  color: var(--text-light); transition: var(--transition); font-weight: 500;
}
.lang-btn.active { background: var(--primary); color: var(--white); }
.lang-btn:not(.active):hover { color: var(--primary); }

.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none;
  padding: 8px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--primary);
  transition: var(--transition); }

.hero {
  margin-top: var(--header-height); min-height: 85vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: var(--white); position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(200,164,78,0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: ''; position: absolute; bottom: -30%; left: -10%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(200,164,78,0.1) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-inner {
  position: relative; z-index: 1; max-width: var(--max-width); margin: 0 auto;
  padding: 60px 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.hero-text h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px; letter-spacing: 2px; }
.hero-text .accent { color: var(--accent-light); }
.hero-text p { font-size: 1.15rem; opacity: 0.85; margin-bottom: 36px; max-width: 500px; line-height: 1.8; }

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 14px 36px; border-radius: 6px; font-weight: 600;
  font-size: 1rem; cursor: pointer; transition: var(--transition); border: 2px solid transparent;
  text-align: center; letter-spacing: 1px; }
.btn-primary { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(200,164,78,0.3); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: var(--white); transform: translateY(-2px); }

.hero-visual {
  display: flex; align-items: center; justify-content: center;
}
.hero-card {
  background: rgba(255,255,255,0.08); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12); border-radius: 16px; padding: 40px;
  text-align: center; max-width: 350px;
}
.hero-card .hc-icon { font-size: 4rem; margin-bottom: 20px; }
.hero-card .hc-stat { font-size: 2.5rem; font-weight: 800; color: var(--accent-light); }
.hero-card .hc-label { font-size: 0.9rem; opacity: 0.7; margin-top: 8px; }

.section { padding: 100px 24px; }
.section-alt { background: var(--bg-alt); }
.section-inner { max-width: var(--max-width); margin: 0 auto; }

.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 2.2rem; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.section-header .subtitle { color: var(--text-light); font-size: 1.05rem; }
.section-header .divider {
  width: 60px; height: 3px; background: var(--accent); margin: 16px auto 0; border-radius: 2px;
}

.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-text p { margin-bottom: 20px; font-size: 1.05rem; color: var(--text-light); line-height: 1.9; }

.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.stat-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; text-align: center; transition: var(--transition);
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.stat-card .stat-value { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stat-card .stat-label { color: var(--text-light); font-size: 0.9rem; margin-top: 4px; }

.products-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.product-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px 28px; transition: var(--transition); text-align: center;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.product-card .pc-icon { font-size: 2.5rem; margin-bottom: 16px; }
.product-card h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--primary); }
.product-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }

.quality-steps { display: flex; flex-direction: column; gap: 20px; max-width: 900px; margin: 0 auto; }

.quality-step {
  display: flex; gap: 24px; background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px; transition: var(--transition);
  align-items: flex-start;
}
.quality-step:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateX(4px); }
.quality-step .qs-num {
  font-size: 2rem; font-weight: 800; color: var(--accent); flex-shrink: 0;
  width: 60px; text-align: center; line-height: 1.2;
  font-family: "Georgia", serif;
}
.quality-step .qs-content h3 { font-size: 1.1rem; color: var(--primary); margin-bottom: 8px; }
.quality-step .qs-content p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; }

.advantages-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.advantage-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 24px; text-align: center; transition: var(--transition);
}
.advantage-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.advantage-card .ac-icon { font-size: 2.2rem; margin-bottom: 14px; }
.advantage-card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--primary); }
.advantage-card p { color: var(--text-light); font-size: 0.9rem; line-height: 1.7; }

.logo-carousel { overflow: hidden; padding: 16px 0; position: relative; }
.logo-carousel::before, .logo-carousel::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 60px; z-index: 2; pointer-events: none;
}
.logo-carousel::before { left: 0; background: linear-gradient(to right, var(--bg-alt), transparent); }
.logo-carousel::after  { right: 0; background: linear-gradient(to left, var(--bg-alt), transparent); }

.logo-track {
  display: flex; gap: 50px; align-items: center;
  animation: scroll-logos 30s linear infinite;
  width: fit-content;
}
.logo-track:hover { animation-play-state: paused; }

.logo-track img {
  height: 56px; width: auto; flex-shrink: 0;
}

@keyframes scroll-logos {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 20px; }

.contact-item {
  display: flex; align-items: flex-start; gap: 16px; padding: 20px; border: 1px solid var(--border);
  border-radius: var(--radius); cursor: pointer; transition: var(--transition);
}
.contact-item:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.contact-item .ci-icon {
  width: 44px; height: 44px; background: var(--bg-alt); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-item .ci-text h4 { font-size: 1rem; color: var(--primary); margin-bottom: 4px; }
.contact-item .ci-text span { font-size: 0.9rem; color: var(--text-light); }

.contact-form-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px;
}
.contact-form-card h3 { font-size: 1.3rem; color: var(--primary); margin-bottom: 24px; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.9rem; color: var(--text-light); margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 0.95rem; font-family: inherit; transition: var(--transition);
  background: var(--bg-alt);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200,164,78,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.footer {
  background: var(--primary-dark); color: rgba(255,255,255,0.65); padding: 60px 24px 30px;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; }

.footer-top { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,0.08); margin-bottom: 24px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; letter-spacing: 1px; }
.footer-col a, .footer-col p { display: block; color: rgba(255,255,255,0.55); font-size: 0.9rem; line-height: 2.2; transition: var(--transition); text-decoration: none; }
.footer-col a:hover { color: var(--accent-light); padding-left: 4px; }
.footer-qr { text-align: left; }
.footer-qr .qr-placeholder { width: 110px; height: 110px; margin-bottom: 8px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: 8px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.footer-qr .qr-placeholder img { width: 100%; height: 100%; object-fit: contain; }
.footer-qr span { font-size: 0.8rem; color: rgba(255,255,255,0.4); }

.footer-links-row { padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,0.08); margin-bottom: 20px; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; font-size: 0.85rem; color: rgba(255,255,255,0.4); }
.footer-links-row a { color: rgba(255,255,255,0.45); text-decoration: none; transition: var(--transition); }
.footer-links-row a:hover { color: var(--accent-light); }

.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; }
.footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; transition: var(--transition); }
.footer-bottom a:hover { color: var(--accent-light); }

@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-links-row { font-size: 0.8rem; }
}
@media (max-width: 480px) {
  .footer-top { grid-template-columns: 1fr; }
}

.reveal { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.reveal.revealed { opacity: 1; transform: translateY(0); }

@media (max-width: 768px) {
  :root { --header-height: 60px; font-size: 15px; }

  .hamburger { display: flex; }

  .main-nav {
    position: fixed; top: var(--header-height); left: 0; right: 0;
    max-height: calc(100vh - var(--header-height));
    background: #fff; z-index: 9999;
    display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 24px;
    transform: translateX(100%); transition: transform 0.3s ease;
    overflow-y: auto;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav a {
    display: block; padding: 16px 0; font-size: 18px; color: #1a1a1a;
    border-bottom: 1px solid #eee; cursor: pointer; text-decoration: none;
  }

  .hero-inner { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-text h1 { font-size: 2rem; }
  .hero-text p { margin-left: auto; margin-right: auto; }
  .hero-buttons { justify-content: center; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-stats { grid-template-columns: 1fr 1fr; }

  .products-grid { grid-template-columns: 1fr 1fr; }
  .advantages-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  .section { padding: 60px 20px; }
  .section-header h2 { font-size: 1.7rem; }
  .quality-step { padding: 22px 18px; gap: 16px; }
  .logo-track img { height: 42px; }
  .logo-track { gap: 32px; }
}

@media (max-width: 480px) {
  .products-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 1.7rem; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
  .hero-card { padding: 24px; }
  .hero-card .hc-stat { font-size: 1.8rem; }
  .about-stats { grid-template-columns: 1fr; }
  .quality-step { flex-direction: column; gap: 12px; padding: 20px 16px; text-align: center; }
  .quality-step .qs-num { width: 100%; }
  .logo-track img { height: 36px; }
  .logo-track { gap: 28px; }
  .contact-form-card { padding: 20px; }
  .org-box, .industries-box { padding: 14px !important; }
}