/* =============================================
   Paijing International Trade — Dark Theme
   ============================================= */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root { --primary: #6366f1; --primary-dark: #4f46e5; --primary-light: #818cf8; --accent: #06b6d4; --accent-dark: #0891b2; --bg-primary: #0a0a0f; --bg-secondary: #111118; --bg-card: #181825; --bg-card-hover: #1e1e30; --text-primary: #f1f1f7; --text-secondary: #a1a1b5; --text-muted: #6b6b80; --border: #2a2a3d; --border-light: #3a3a50; --glow: rgba(99, 102, 241, 0.15); --radius: 16px; --radius-sm: 10px; --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; background: var(--bg-primary); color: var(--text-primary); line-height: 1.7; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.bg-grid { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background-image: linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px); background-size: 60px 60px; pointer-events: none; z-index: 0; }
.bg-glow { position: fixed; top: -20%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%); pointer-events: none; z-index: 0; }
.bg-glow-2 { position: fixed; bottom: -20%; left: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(6, 182, 212, 0.06) 0%, transparent 70%); pointer-events: none; z-index: 0; }
header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(10, 10, 15, 0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
nav { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 12px; font-size: 1.2rem; font-weight: 700; color: var(--text-primary) !important; letter-spacing: -0.5px; }
.logo-icon { display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; background: linear-gradient(135deg, var(--primary), var(--accent)); border-radius: 10px; font-size: 1rem; font-weight: 800; color: #fff; flex-shrink: 0; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { padding: 8px 16px; border-radius: 8px; color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; transition: var(--transition); }
.nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav-cta { background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important; color: #fff !important; padding: 10px 20px !important; border-radius: 8px !important; font-weight: 600 !important; }
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }
.hero { position: relative; z-index: 1; min-height: 100vh; display: flex; align-items: center; padding: 120px 0 80px; }
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-text h1 { font-size: 3.5rem; font-weight: 800; line-height: 1.15; letter-spacing: -1.5px; margin-bottom: 20px; background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-text p { font-size: 1.15rem; color: var(--text-secondary); max-width: 520px; margin-bottom: 36px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; }
.btn-primary, .btn-secondary { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: 10px; font-size: 0.95rem; font-weight: 600; transition: var(--transition); cursor: pointer; border: none; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff !important; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99, 102, 241, 0.3); }
.btn-secondary { background: transparent; color: var(--text-primary) !important; border: 1px solid var(--border-light); }
.btn-secondary:hover { border-color: var(--primary); background: rgba(99, 102, 241, 0.1); }
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-grid-visual { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 30px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.grid-item { width: 80px; height: 80px; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; background: rgba(99, 102, 241, 0.05); border-radius: var(--radius-sm); border: 1px solid var(--border); transition: var(--transition); }
.grid-item:hover { border-color: var(--primary); background: rgba(99, 102, 241, 0.1); transform: scale(1.05); }
.section { position: relative; z-index: 1; padding: 100px 0; }
.section-header { text-align: center; max-width: 700px; margin: 0 auto 60px; }
.section-tag { display: inline-block; padding: 6px 16px; background: rgba(99, 102, 241, 0.1); color: var(--primary-light); border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.5px; text-transform: uppercase; }
.section-header h2 { font-size: 2.5rem; font-weight: 700; margin-bottom: 16px; letter-spacing: -0.5px; }
.section-header p { color: var(--text-secondary); font-size: 1.1rem; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px 28px; transition: var(--transition); }
.service-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(99, 102, 241, 0.1); }
.service-icon { width: 52px; height: 52px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; background: rgba(99, 102, 241, 0.1); border-radius: 12px; margin-bottom: 20px; }
.service-card h3 { font-size: 1.15rem; margin-bottom: 12px; font-weight: 600; }
.service-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }
.industries-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.industry-chip { display: flex; align-items: center; gap: 10px; padding: 14px 18px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-secondary); font-size: 0.88rem; transition: var(--transition); cursor: default; }
.industry-chip:hover { border-color: var(--primary-light); background: rgba(99, 102, 241, 0.05); color: var(--text-primary); }
.ind-icon { font-size: 1.1rem; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text h2 { font-size: 2rem; font-weight: 700; margin-bottom: 20px; }
.about-text p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.8; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 32px; }
.stat-item { text-align: center; padding: 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--primary-light); display: block; }
.stat-label { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }
.about-card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-mini-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 24px; transition: var(--transition); }
.about-mini-card:hover { border-color: var(--primary); background: var(--bg-card-hover); }
.about-mini-card .icon { font-size: 1.5rem; margin-bottom: 12px; }
.about-mini-card h4 { font-size: 1rem; margin-bottom: 8px; }
.about-mini-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.team-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 24px; text-align: center; transition: var(--transition); }
.team-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.team-avatar { font-size: 3rem; margin-bottom: 16px; }
.team-card h4 { font-size: 1rem; margin-bottom: 4px; }
.team-card .role { color: var(--text-muted); font-size: 0.85rem; }
.page-hero { position: relative; z-index: 1; padding: 140px 0 60px; text-align: center; }
.page-hero h1 { font-size: 3rem; font-weight: 800; margin-bottom: 16px; letter-spacing: -1px; }
.page-hero p { color: var(--text-secondary); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.contact-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info h2 { font-size: 1.8rem; margin-bottom: 16px; }
.contact-info > p { color: var(--text-secondary); margin-bottom: 32px; }
.contact-detail { display: flex; gap: 16px; margin-bottom: 24px; }
.contact-detail .icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; background: rgba(99, 102, 241, 0.1); border-radius: var(--radius-sm); flex-shrink: 0; }
.contact-detail h4 { font-size: 0.9rem; margin-bottom: 4px; }
.contact-detail p { color: var(--text-secondary); font-size: 0.9rem; }
.contact-form { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; background: var(--bg-primary); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-primary); font-size: 0.9rem; font-family: inherit; transition: var(--transition); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1); }
.form-group textarea { min-height: 120px; resize: vertical; }
.content-page { position: relative; z-index: 1; padding: 60px 0 100px; }
.content-body { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 48px; }
.content-body h2 { font-size: 1.6rem; margin: 40px 0 16px; color: var(--text-primary); }
.content-body h2:first-child { margin-top: 0; }
.content-body h3 { font-size: 1.15rem; margin: 28px 0 12px; color: var(--text-primary); }
.content-body p { color: var(--text-secondary); margin-bottom: 14px; line-height: 1.8; }
.content-body ul { margin-bottom: 20px; padding-left: 24px; }
.content-body ul li { color: var(--text-secondary); margin-bottom: 8px; line-height: 1.7; position: relative; padding-left: 16px; }
.content-body ul li::before { content: "▸"; position: absolute; left: -8px; color: var(--primary-light); }
.last-updated { padding: 16px 20px; background: rgba(99, 102, 241, 0.05); border: 1px solid rgba(99, 102, 241, 0.15); border-radius: var(--radius-sm); margin-bottom: 32px; }
.last-updated p { color: var(--text-secondary); margin-bottom: 0; }
footer { position: relative; z-index: 1; background: var(--bg-secondary); border-top: 1px solid var(--border); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: var(--text-muted); font-size: 0.88rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary-light); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a { color: var(--text-muted); font-size: 0.85rem; }
@media (max-width: 900px) { .hero-content { grid-template-columns: 1fr; gap: 40px; } .hero-text h1 { font-size: 2.5rem; } .about-grid { grid-template-columns: 1fr; } .services-grid { grid-template-columns: 1fr 1fr; } .contact-wrapper { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr 1fr; } .team-grid { grid-template-columns: 1fr 1fr; } .nav-links { display: none; } .hamburger { display: flex; } }
@media (max-width: 600px) { .services-grid { grid-template-columns: 1fr; } .team-grid { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr; } .hero-text h1 { font-size: 2rem; } .section-header h2 { font-size: 1.8rem; } .page-hero h1 { font-size: 2rem; } .content-body { padding: 28px; } .stats-grid { grid-template-columns: 1fr; } .about-card-grid { grid-template-columns: 1fr; } .hero-buttons { flex-direction: column; } }