/* ============================
   开辰电力 - 现代科技风格
   Template A - Modern Tech
   ============================ */

:root {
  --primary: #0A1628;
  --primary-light: #162340;
  --accent: #00A3E0;
  --accent-light: #E8F6FC;
  --accent-dark: #007BB5;
  --white: #FFFFFF;
  --gray-50: #F5F7FA;
  --gray-100: #E8ECF1;
  --gray-200: #D1D8E0;
  --gray-400: #8A97AA;
  --gray-600: #5A6678;
  --gray-900: #1A2332;
  --shadow: 0 4px 24px rgba(0, 163, 224, 0.10);
  --shadow-lg: 0 12px 48px rgba(0, 163, 224, 0.16);
  --shadow-hover: 0 16px 56px rgba(0, 163, 224, 0.22);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--gray-900);
  line-height: 1.75;
  background: var(--white);
  overflow-x: hidden;
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5 { font-weight: 800; line-height: 1.25; color: var(--primary); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.4rem); }
h3 { font-size: 1.25rem; }
p { color: var(--gray-600); }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 36px; border-radius: 8px; font-weight: 700; font-size: 0.95rem;
  cursor: pointer; border: none; transition: var(--transition); text-decoration: none;
}
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,163,224,0.35); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.5); }
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.1); }
.btn-outline-dark { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
.btn-outline-dark:hover { background: var(--accent); color: var(--white); }
.btn-sm { padding: 10px 24px; font-size: 0.875rem; }

/* ---- Section ---- */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-header h2 { margin-bottom: 12px; }
.section-header p { font-size: 1.1rem; color: var(--gray-400); }
.section-tag { display: inline-block; background: var(--accent-light); color: var(--accent); font-size: 0.8rem; font-weight: 700; padding: 4px 16px; border-radius: 20px; margin-bottom: 12px; letter-spacing: 1px; text-transform: uppercase; }

/* ---- Navbar ---- */
.navbar {
  position: fixed; top: 0; width: 100%; z-index: 1000;
  background: rgba(10, 22, 40, 0.97); backdrop-filter: blur(12px);
  transition: var(--transition); border-bottom: 1px solid rgba(255,255,255,0.06);
}
.navbar.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow); border-bottom-color: var(--gray-100); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 0 24px; max-width: 1200px; margin: 0 auto; height: 72px; }
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-logo-icon { width: 40px; height: 40px; background: var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.nav-logo-text { font-size: 1.1rem; font-weight: 800; color: var(--white); letter-spacing: 1px; }
.navbar.scrolled .nav-logo-text { color: var(--primary); }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  display: block; padding: 8px 16px; color: rgba(255,255,255,0.75);
  font-size: 0.9rem; font-weight: 500; border-radius: 6px;
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--white); background: rgba(255,255,255,0.08); }
.navbar.scrolled .nav-links a { color: var(--gray-600); }
.navbar.scrolled .nav-links a:hover, .navbar.scrolled .nav-links a.active { color: var(--accent); background: var(--accent-light); }
.nav-cta { background: var(--accent) !important; color: var(--white) !important; font-weight: 700 !important; padding: 10px 24px !important; }
.nav-cta:hover { background: var(--accent-dark) !important; transform: none !important; }
.nav-phone { color: rgba(255,255,255,0.6); font-size: 0.85rem; margin-right: 16px; }
.navbar.scrolled .nav-phone { color: var(--gray-400); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }
.navbar.scrolled .nav-toggle span { background: var(--primary); }

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #0F2A4A 50%, #0A1E38 100%);
  min-height: 100vh; display: flex; align-items: center; position: relative; overflow: hidden;
}
.hero-grid-bg {
  position: absolute; inset: 0; opacity: 0.06;
  background-image:
    linear-gradient(rgba(0,163,224,0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,163,224,0.5) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-glow {
  position: absolute; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,163,224,0.15) 0%, transparent 70%);
  top: -100px; right: -100px; pointer-events: none;
}
.hero-content { position: relative; z-index: 2; color: var(--white); max-width: 1200px; margin: 0 auto; padding: 120px 24px 80px; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.hero-text h1 { color: var(--white); margin-bottom: 20px; font-weight: 900; }
.hero-text h1 span { color: var(--accent); }
.hero-text > p { color: rgba(255,255,255,0.7); font-size: 1.15rem; margin-bottom: 32px; max-width: 480px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }
.badge { background: rgba(0,163,224,0.15); border: 1px solid rgba(0,163,224,0.3); color: #7DCAEF; padding: 6px 14px; border-radius: 20px; font-size: 0.82rem; font-weight: 600; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual { display: flex; flex-direction: column; gap: 16px; }
.hero-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); padding: 28px; backdrop-filter: blur(8px);
  transition: var(--transition);
}
.hero-card:hover { background: rgba(255,255,255,0.1); transform: translateX(8px); border-color: rgba(0,163,224,0.4); }
.hero-card h3 { color: var(--white); font-size: 1.05rem; margin-bottom: 6px; }
.hero-card p { color: rgba(255,255,255,0.55); font-size: 0.875rem; }
.hero-card-icon { font-size: 2rem; margin-bottom: 12px; }

/* ---- Stats ---- */
.stats { background: var(--white); position: relative; z-index: 5; margin-top: -60px; padding: 0 0 60px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { background: var(--white); border-radius: var(--radius); padding: 40px 28px; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--gray-100); transition: var(--transition); }
.stat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.stat-icon { font-size: 2.5rem; margin-bottom: 16px; }
.stat-num { font-size: 3rem; font-weight: 900; color: var(--accent); line-height: 1; font-family: 'Montserrat', sans-serif; }
.stat-num span { font-size: 1.5rem; }
.stat-label { font-size: 1rem; font-weight: 700; color: var(--primary); margin: 8px 0 4px; }
.stat-desc { font-size: 0.82rem; color: var(--gray-400); }

/* ---- Products Preview ---- */
.products-preview { background: var(--gray-50); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: var(--white); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--gray-100);
  transition: var(--transition); text-decoration: none; color: inherit;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.product-card-img { height: 200px; display: flex; align-items: center; justify-content: center; font-size: 4rem; position: relative; overflow: hidden; }
.product-card-img::after { content: ''; position: absolute; inset: 0; opacity: 0; background: var(--accent); transition: var(--transition); }
.product-card:hover .product-card-img::after { opacity: 0.08; }
.product-card-img-1 { background: linear-gradient(135deg, #0A1628, #1A3A5C); }
.product-card-img-2 { background: linear-gradient(135deg, #0F4C75, #1B6B93); }
.product-card-img-3 { background: linear-gradient(135deg, #1A4D2E, #2D7A4A); }
.product-card-img-4 { background: linear-gradient(135deg, #4A1942, #7B2D8B); }
.product-card-img-5 { background: linear-gradient(135deg, #7A3E1A, #B8621B); }
.product-card-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.product-cat { font-size: 0.75rem; color: var(--accent); font-weight: 700; letter-spacing: 1px; margin-bottom: 8px; text-transform: uppercase; }
.product-card h3 { font-size: 1.2rem; margin-bottom: 10px; color: var(--primary); }
.product-card p { font-size: 0.9rem; color: var(--gray-600); flex: 1; margin-bottom: 16px; }
.product-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.product-tag { background: var(--gray-50); color: var(--gray-600); font-size: 0.78rem; padding: 4px 10px; border-radius: 4px; font-weight: 500; border: 1px solid var(--gray-100); }

/* ---- Advantages ---- */
.advantages { background: var(--white); }
.advantage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.advantage-card {
  padding: 40px 32px; border-radius: var(--radius-lg); position: relative; overflow: hidden;
  background: var(--gray-50); border: 1px solid var(--gray-100); transition: var(--transition);
}
.advantage-card:hover { border-color: rgba(0,163,224,0.3); box-shadow: var(--shadow); transform: translateY(-4px); }
.advantage-num { font-size: 4rem; font-weight: 900; color: var(--gray-100); position: absolute; top: -10px; right: 16px; font-family: 'Montserrat', sans-serif; line-height: 1; }
.advantage-icon { font-size: 2.5rem; margin-bottom: 16px; }
.advantage-card h3 { font-size: 1.15rem; margin-bottom: 12px; }
.advantage-card p { font-size: 0.925rem; color: var(--gray-600); }

/* ---- Partner ---- */
.partners { background: var(--primary); padding: 60px 0; }
.partners-inner { display: flex; align-items: center; gap: 60px; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.partners-title { color: rgba(255,255,255,0.6); font-size: 0.9rem; white-space: nowrap; }
.partner-list { display: flex; flex-wrap: wrap; gap: 32px; align-items: center; flex: 1; }
.partner-item { color: rgba(255,255,255,0.4); font-size: 0.95rem; font-weight: 600; letter-spacing: 1px; transition: var(--transition); cursor: default; }
.partner-item:hover { color: var(--accent); }

/* ---- News ---- */
.news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--gray-100); transition: var(--transition); text-decoration: none; color: inherit; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.news-card-img { height: 180px; display: flex; align-items: center; justify-content: center; font-size: 3rem; color: rgba(255,255,255,0.5); }
.news-card-body { padding: 24px; flex: 1; }
.news-date { font-size: 0.78rem; color: var(--accent); font-weight: 700; margin-bottom: 8px; }
.news-card h3 { font-size: 1.05rem; margin-bottom: 10px; line-height: 1.5; }
.news-card p { font-size: 0.875rem; color: var(--gray-600); }
.news-more { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-size: 0.85rem; font-weight: 700; margin-top: 12px; }

/* ---- Page Header ---- */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, #0F2A4A 100%);
  padding: 140px 0 80px; text-align: center; position: relative; overflow: hidden;
}
.page-header::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(0,163,224,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(0,163,224,0.05) 1px, transparent 1px); background-size: 40px 40px; }
.page-header h1 { color: var(--white); position: relative; z-index: 2; margin-bottom: 12px; }
.page-header p { color: rgba(255,255,255,0.6); font-size: 1.1rem; position: relative; z-index: 2; }
.breadcrumb { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 20px; position: relative; z-index: 2; }
.breadcrumb a { color: rgba(255,255,255,0.5); font-size: 0.875rem; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: rgba(255,255,255,0.3); font-size: 0.8rem; }
.breadcrumb .current { color: var(--accent); }

/* ---- About Page ---- */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-text h2 { margin-bottom: 20px; }
.about-text p { margin-bottom: 16px; font-size: 1rem; }
.about-img { background: linear-gradient(135deg, var(--primary), #1A3A5C); border-radius: var(--radius-lg); height: 400px; display: flex; align-items: center; justify-content: center; font-size: 5rem; color: rgba(255,255,255,0.15); position: relative; overflow: hidden; }
.about-img::before { content: ''; position: absolute; inset: 0; background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(0,163,224,0.2)" stroke-width="0.5"/><circle cx="50" cy="50" r="30" fill="none" stroke="rgba(0,163,224,0.15)" stroke-width="0.5"/><circle cx="50" cy="50" r="20" fill="none" stroke="rgba(0,163,224,0.1)" stroke-width="0.5"/></svg>') center/contain no-repeat; }
.about-values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.about-value-item { text-align: center; padding: 28px 20px; background: var(--gray-50); border-radius: var(--radius); }
.about-value-item .icon { font-size: 2.5rem; margin-bottom: 12px; }
.about-value-item strong { display: block; font-size: 1.8rem; color: var(--accent); font-family: 'Montserrat', sans-serif; margin-bottom: 4px; }
.about-value-item span { font-size: 0.875rem; color: var(--gray-600); }

.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.team-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--gray-100); }
.team-card-header { background: linear-gradient(135deg, var(--primary), #1A3A5C); padding: 40px 24px 24px; text-align: center; }
.team-avatar { width: 80px; height: 80px; background: rgba(0,163,224,0.2); border-radius: 50%; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; font-size: 2rem; }
.team-card-header h3 { color: var(--white); font-size: 1.15rem; }
.team-card-header p { color: rgba(255,255,255,0.6); font-size: 0.85rem; }
.team-card-body { padding: 24px; }
.team-feature { display: flex; align-items: flex-start; gap: 10px; font-size: 0.875rem; color: var(--gray-600); margin-bottom: 10px; }
.team-feature::before { content: '✓'; color: var(--accent); font-weight: 700; flex-shrink: 0; }

/* ---- Product List ---- */
.products-filters { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-bottom: 48px; }
.filter-btn { padding: 10px 24px; border-radius: 30px; border: 2px solid var(--gray-200); background: var(--white); color: var(--gray-600); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: var(--transition); }
.filter-btn:hover, .filter-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }
.products-full-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.product-list-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--gray-100); display: grid; grid-template-columns: 280px 1fr; transition: var(--transition); }
.product-list-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.product-list-img { background: linear-gradient(135deg, var(--primary), #1A3A5C); display: flex; align-items: center; justify-content: center; font-size: 4rem; color: rgba(255,255,255,0.2); min-height: 220px; }
.product-list-body { padding: 32px; display: flex; flex-direction: column; justify-content: center; }
.product-list-body h3 { font-size: 1.3rem; margin-bottom: 8px; }
.product-list-body .subtitle { color: var(--accent); font-size: 0.82rem; font-weight: 700; letter-spacing: 1px; margin-bottom: 12px; }
.product-list-body p { font-size: 0.9rem; color: var(--gray-600); margin-bottom: 16px; }
.product-specs-table { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; margin-bottom: 20px; }
.spec-item { display: flex; gap: 8px; font-size: 0.85rem; }
.spec-label { color: var(--gray-400); min-width: 80px; }
.spec-value { color: var(--gray-900); font-weight: 600; }

/* ---- Product Detail ---- */
.product-detail-layout { display: grid; grid-template-columns: 1fr 360px; gap: 40px; align-items: start; }
.product-gallery { background: linear-gradient(135deg, var(--primary), #0F2A4A); border-radius: var(--radius-lg); height: 400px; display: flex; align-items: center; justify-content: center; font-size: 6rem; color: rgba(255,255,255,0.15); position: relative; overflow: hidden; }
.product-gallery-tag { position: absolute; top: 20px; left: 20px; background: var(--accent); color: white; font-size: 0.8rem; font-weight: 700; padding: 6px 14px; border-radius: 20px; }
.product-sidebar { position: sticky; top: 90px; }
.product-info-card { background: var(--white); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow); border: 1px solid var(--gray-100); margin-bottom: 20px; }
.product-info-card h1 { font-size: 1.6rem; margin-bottom: 6px; }
.product-model { color: var(--accent); font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; display: block; }
.product-info-card .short-desc { font-size: 0.95rem; color: var(--gray-600); margin-bottom: 24px; }
.product-meta-list { display: flex; flex-direction: column; gap: 12px; }
.product-meta-item { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; }
.product-meta-item .icon { width: 36px; height: 36px; background: var(--accent-light); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 1rem; flex-shrink: 0; }
.product-meta-item .label { color: var(--gray-400); font-size: 0.8rem; }
.product-meta-item .value { color: var(--gray-900); font-weight: 600; }
.specs-section { margin-top: 48px; }
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table th { background: var(--primary); color: var(--white); padding: 14px 16px; text-align: left; font-weight: 600; font-size: 0.9rem; }
.specs-table td { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); font-size: 0.9rem; }
.specs-table tr:hover td { background: var(--gray-50); }
.specs-table td:first-child { color: var(--gray-400); font-weight: 600; width: 180px; }
.features-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 40px; }
.feature-item { display: flex; gap: 16px; padding: 24px; background: var(--gray-50); border-radius: var(--radius); border: 1px solid var(--gray-100); }
.feature-icon { font-size: 1.8rem; flex-shrink: 0; }
.feature-item h4 { font-size: 0.95rem; margin-bottom: 6px; }
.feature-item p { font-size: 0.85rem; color: var(--gray-600); }

/* ---- Tech Page ---- */
.tech-highlight { background: var(--primary); padding: 80px 0; color: var(--white); position: relative; overflow: hidden; }
.tech-highlight::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(0,163,224,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(0,163,224,0.05) 1px, transparent 1px); background-size: 60px 60px; }
.tech-highlight-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.tech-highlight h2 { color: var(--white); margin-bottom: 20px; }
.tech-highlight p { color: rgba(255,255,255,0.7); margin-bottom: 16px; }
.tech-highlight .highlight-text { color: var(--accent); font-weight: 700; font-size: 1.2rem; }
.tech-highlight-cards { display: flex; flex-direction: column; gap: 16px; }
.tech-card-simple { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius); padding: 20px; }
.tech-card-simple h4 { color: var(--accent); font-size: 0.95rem; margin-bottom: 6px; }
.tech-card-simple p { color: rgba(255,255,255,0.55); font-size: 0.875rem; }

.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert-item { background: var(--white); border-radius: var(--radius); padding: 32px 20px; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--gray-100); transition: var(--transition); }
.cert-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(0,163,224,0.3); }
.cert-icon { font-size: 2.5rem; margin-bottom: 12px; }
.cert-item h4 { font-size: 1.1rem; color: var(--primary); margin-bottom: 6px; }
.cert-item p { font-size: 0.82rem; color: var(--gray-600); }

/* ---- Cases ---- */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--gray-100); transition: var(--transition); }
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-img { height: 200px; display: flex; align-items: center; justify-content: center; font-size: 3rem; color: rgba(255,255,255,0.4); position: relative; }
.case-img-1 { background: linear-gradient(135deg, #0A1628, #1A3A5C); }
.case-img-2 { background: linear-gradient(135deg, #0F4C75, #1B6B93); }
.case-img-3 { background: linear-gradient(135deg, #1A4D2E, #2D7A4A); }
.case-img-4 { background: linear-gradient(135deg, #4A1942, #7B2D8B); }
.case-img-5 { background: linear-gradient(135deg, #7A3E1A, #B8621B); }
.case-img-6 { background: linear-gradient(135deg, #1A3A5C, #0F2A4A); }
.case-region { position: absolute; top: 12px; right: 12px; background: rgba(0,0,0,0.5); color: white; font-size: 0.75rem; padding: 4px 10px; border-radius: 12px; backdrop-filter: blur(4px); }
.case-body { padding: 24px; }
.case-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.case-body p { font-size: 0.875rem; color: var(--gray-600); margin-bottom: 12px; }
.case-products { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---- Service ---- */
.service-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-card { background: var(--white); border-radius: var(--radius-lg); padding: 48px; box-shadow: var(--shadow); border: 1px solid var(--gray-100); display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: start; transition: var(--transition); }
.service-card:hover { box-shadow: var(--shadow-lg); border-color: rgba(0,163,224,0.3); transform: translateY(-4px); }
.service-icon-large { width: 72px; height: 72px; background: var(--accent-light); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 2rem; }
.service-card h3 { font-size: 1.25rem; margin-bottom: 12px; }
.service-card p { font-size: 0.9rem; color: var(--gray-600); margin-bottom: 16px; }
.service-features { display: flex; flex-direction: column; gap: 8px; }
.service-feature { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; color: var(--gray-600); }
.service-feature::before { content: '✓'; color: var(--accent); font-weight: 700; }

/* ---- Contact ---- */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; padding: 24px; background: var(--gray-50); border-radius: var(--radius); border: 1px solid var(--gray-100); }
.contact-item-icon { width: 48px; height: 48px; background: var(--accent); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; flex-shrink: 0; }
.contact-item h4 { font-size: 0.95rem; margin-bottom: 4px; }
.contact-item p { font-size: 0.875rem; color: var(--gray-600); }
.contact-form { background: var(--white); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); border: 1px solid var(--gray-100); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 6px; color: var(--gray-900); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 2px solid var(--gray-200); border-radius: 8px; font-size: 0.95rem; font-family: inherit; transition: var(--transition); background: var(--white); }
.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(0,163,224,0.1); }
.form-group textarea { min-height: 120px; resize: vertical; }
.map-placeholder { height: 300px; background: linear-gradient(135deg, var(--gray-100), var(--gray-200)); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; color: var(--gray-400); font-size: 1rem; margin-top: 40px; }

/* ---- FAQ ---- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--white); border-radius: var(--radius); border: 1px solid var(--gray-100); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: rgba(0,163,224,0.3); }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; font-weight: 700; font-size: 0.95rem; color: var(--primary); gap: 16px; }
.faq-question::before { content: 'Q'; width: 28px; height: 28px; background: var(--accent); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: 700; flex-shrink: 0; }
.faq-toggle { font-size: 1.2rem; color: var(--accent); flex-shrink: 0; transition: var(--transition); }
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.faq-answer { padding: 0 24px 20px; font-size: 0.9rem; color: var(--gray-600); line-height: 1.8; display: none; }
.faq-item.open .faq-answer { display: block; }

/* ---- Footer ---- */
.footer { background: var(--primary); color: rgba(255,255,255,0.6); padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 60px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-logo-icon { width: 40px; height: 40px; background: var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.footer-logo-text { font-size: 1.1rem; font-weight: 800; color: var(--white); }
.footer-brand p { font-size: 0.875rem; color: rgba(255,255,255,0.5); margin-bottom: 8px; }
.footer-brand .footer-desc { font-size: 0.875rem; color: rgba(255,255,255,0.6); margin-top: 16px; line-height: 1.7; }
.footer h4 { color: var(--white); font-size: 0.95rem; font-weight: 700; margin-bottom: 20px; letter-spacing: 0.5px; }
.footer ul li { margin-bottom: 12px; }
.footer a { color: rgba(255,255,255,0.5); font-size: 0.875rem; }
.footer a:hover { color: var(--accent); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding: 24px 0; font-size: 0.8rem; }
.footer-bottom p { color: rgba(255,255,255,0.35); }
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a { color: rgba(255,255,255,0.35); font-size: 0.8rem; }
.footer-bottom-links a:hover { color: var(--accent); }

/* ---- Page Nav ---- */
.page-nav { display: flex; align-items: center; justify-content: space-between; padding: 24px; background: var(--gray-50); border-radius: var(--radius); margin-top: 40px; }
.page-nav a { display: flex; align-items: center; gap: 8px; color: var(--gray-600); font-size: 0.875rem; font-weight: 600; }
.page-nav a:hover { color: var(--accent); }
.page-nav .label { font-size: 0.75rem; color: var(--gray-400); display: block; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; padding: 100px 24px 60px; }
  .hero-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid, .advantage-grid, .news-list, .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .tech-highlight-inner { grid-template-columns: 1fr; gap: 40px; }
  .product-detail-layout { grid-template-columns: 1fr; }
  .product-sidebar { position: static; }
  .product-list-card { grid-template-columns: 1fr; }
  .product-list-img { min-height: 160px; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: var(--primary); flex-direction: column; padding: 16px; gap: 4px; border-radius: 0 0 var(--radius) var(--radius); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .navbar.scrolled .nav-links { background: var(--white); box-shadow: var(--shadow); }
  .hero-content { padding: 90px 16px 60px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .product-grid, .advantage-grid, .news-list, .cases-grid, .cert-grid { grid-template-columns: 1fr; }
  .features-list, .service-cards, .team-grid, .products-full-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .about-values { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .hero-visual { grid-template-columns: 1fr; }
}