/* ===== Shenggong - Emerald + Indigo Theme ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --bg-primary: #0a0e0f; --bg-secondary: #0f1718; --bg-card: #162226; --bg-hover: #1a2a30;
    --text-primary: #e0ece8; --text-secondary: #98a8a8; --text-muted: #5a6a6a;
    --accent-primary: #10b981; --accent-secondary: #6366f1;
    --accent-gradient: linear-gradient(135deg, #10b981 0%, #6366f1 100%);
    --border-color: #1a2a30; --shadow-color: rgba(16,185,129,0.12);
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif; --max-width: 1200px; --nav-height: 70px;
}
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
a { color: var(--accent-primary); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--accent-secondary); }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.navbar { position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height); background: rgba(10,14,15,0.95); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-color); z-index: 1000; display: flex; align-items: center; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.nav-brand { font-size: 1.35rem; font-weight: 700; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.5px; }
.nav-links { display: flex; list-style: none; gap: 5px; align-items: center; }
.nav-links a { color: var(--text-secondary); padding: 8px 16px; border-radius: 8px; font-size: 0.9rem; font-weight: 500; transition: all 0.3s ease; }
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); background: var(--bg-card); }
.nav-toggle { display: none; flex-direction: column; cursor: pointer; gap: 5px; padding: 5px; }
.nav-toggle span { display: block; width: 25px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all 0.3s ease; }
.hero { min-height: 100vh; display: flex; align-items: center; padding: 120px 0 80px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(16,185,129,0.08), transparent 70%); pointer-events: none; }
.hero::after { content: ''; position: absolute; bottom: -30%; left: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(99,102,241,0.06), transparent 70%); pointer-events: none; }
.hero-content { position: relative; z-index: 1; max-width: 750px; }
.hero-badge { display: inline-block; padding: 6px 16px; background: rgba(16,185,129,0.15); border: 1px solid rgba(16,185,129,0.3); border-radius: 20px; font-size: 0.8rem; color: var(--accent-secondary); margin-bottom: 24px; letter-spacing: 0.5px; }
.hero h1 { font-size: 3.5rem; font-weight: 800; line-height: 1.15; margin-bottom: 24px; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 36px; max-width: 600px; line-height: 1.8; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: 12px; font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease; border: none; font-family: inherit; }
.btn-primary { background: var(--accent-gradient); color: #fff; box-shadow: 0 4px 20px var(--shadow-color); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--shadow-color); color: #fff; }
.btn-secondary { background: transparent; color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--bg-card); border-color: var(--accent-primary); transform: translateY(-2px); }
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 2.5rem; font-weight: 700; margin-bottom: 16px; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-header p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; line-height: 1.7; }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.service-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 36px 28px; transition: all 0.3s ease; position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent-gradient); transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease; }
.service-card:hover { transform: translateY(-4px); border-color: rgba(16,185,129,0.3); box-shadow: 0 8px 30px var(--shadow-color); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon { width: 56px; height: 56px; border-radius: 14px; background: rgba(16,185,129,0.15); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; font-size: 1.5rem; }
.service-card h3 { font-size: 1.2rem; margin-bottom: 12px; color: var(--text-primary); }
.service-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }
.stats-section { background: var(--bg-secondary); }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; text-align: center; }
.stat-item { padding: 32px 20px; }
.stat-number { font-size: 2.8rem; font-weight: 800; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: block; margin-bottom: 8px; }
.stat-label { color: var(--text-secondary); font-size: 0.95rem; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.feature-item { display: flex; gap: 20px; padding: 24px; background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color); transition: all 0.3s ease; }
.feature-item:hover { border-color: rgba(16,185,129,0.3); transform: translateX(4px); }
.feature-icon { font-size: 1.6rem; flex-shrink: 0; width: 48px; height: 48px; background: rgba(16,185,129,0.12); border-radius: 12px; display: flex; align-items: center; justify-content: center; }
.feature-text h4 { font-size: 1.05rem; margin-bottom: 6px; }
.feature-text p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.6; }
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; text-align: center; }
.team-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 32px 20px; transition: all 0.3s ease; }
.team-card:hover { transform: translateY(-4px); border-color: rgba(16,185,129,0.3); box-shadow: 0 8px 30px var(--shadow-color); }
.team-avatar { width: 80px; height: 80px; border-radius: 50%; background: var(--accent-gradient); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 2rem; color: #fff; }
.team-card h4 { font-size: 1.05rem; margin-bottom: 4px; }
.team-card .role { color: var(--accent-secondary); font-size: 0.85rem; font-weight: 500; }
.team-card p { color: var(--text-secondary); font-size: 0.85rem; margin-top: 8px; line-height: 1.5; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon { width: 48px; height: 48px; border-radius: 12px; background: rgba(16,185,129,0.12); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.contact-item h4 { font-size: 1rem; margin-bottom: 4px; }
.contact-item p, .contact-item a { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.5; }
.contact-form { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 36px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 10px; color: var(--text-primary); font-size: 0.95rem; font-family: inherit; transition: border-color 0.3s ease; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--accent-primary); box-shadow: 0 0 0 3px rgba(16,185,129,0.1); }
.form-group textarea { min-height: 120px; resize: vertical; }
.page-header { padding: 120px 0 60px; text-align: center; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); }
.page-header h1 { font-size: 2.8rem; font-weight: 700; margin-bottom: 12px; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.page-header p { color: var(--text-secondary); font-size: 1.05rem; }
.content-page { padding: 60px 0 100px; }
.content-page .container { max-width: 860px; }
.content-section { margin-bottom: 48px; }
.content-section h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 16px; color: var(--accent-primary); }
.content-section h3 { font-size: 1.2rem; font-weight: 600; margin: 24px 0 12px; color: var(--text-primary); }
.content-section p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.8; font-size: 0.95rem; }
.content-section ul, .content-section ol { color: var(--text-secondary); margin-bottom: 16px; padding-left: 24px; line-height: 1.8; }
.content-section li { margin-bottom: 8px; font-size: 0.95rem; }
.content-section strong { color: var(--text-primary); }
.last-updated { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 32px; font-style: italic; }
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-text h2 { font-size: 2rem; margin-bottom: 20px; }
.about-text p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.8; }
.about-image { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 40px; text-align: center; min-height: 300px; display: flex; align-items: center; justify-content: center; }
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; margin-top: 48px; }
.value-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 28px; text-align: center; transition: all 0.3s ease; }
.value-card:hover { transform: translateY(-4px); border-color: rgba(16,185,129,0.3); }
.value-icon { font-size: 2.4rem; margin-bottom: 16px; }
.value-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.value-card p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.6; }
.footer { background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { font-size: 1.3rem; margin-bottom: 12px; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-brand p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.7; max-width: 320px; }
.footer-links h4 { font-size: 1rem; margin-bottom: 16px; color: var(--text-primary); }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-secondary); font-size: 0.88rem; transition: color 0.3s ease; }
.footer-links a:hover { color: var(--accent-primary); }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { color: var(--text-muted); font-size: 0.82rem; }
.footer-social { display: flex; gap: 12px; }
.footer-social a { width: 36px; height: 36px; border-radius: 8px; background: var(--bg-card); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 0.9rem; transition: all 0.3s ease; }
.footer-social a:hover { background: var(--accent-primary); color: #fff; }
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; border-radius: 12px; background: var(--accent-gradient); color: #fff; border: none; cursor: pointer; font-size: 1.2rem; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: all 0.3s ease; z-index: 999; box-shadow: 0 4px 20px var(--shadow-color); }
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-4px); }
@media (max-width: 992px) { .hero h1 { font-size: 2.5rem; } .about-content, .contact-grid { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 768px) {
    .nav-links { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(10,14,15,0.98); flex-direction: column; padding: 20px; border-bottom: 1px solid var(--border-color); gap: 0; }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 14px 16px; width: 100%; border-radius: 8px; }
    .nav-toggle { display: flex; }
    .hero h1 { font-size: 2rem; } .hero p { font-size: 1rem; }
    .section-header h2 { font-size: 1.8rem; }
    .services-grid, .footer-grid { grid-template-columns: 1fr; }
    .page-header h1 { font-size: 2rem; }
}