:root {
    --primary: #0066cc;
    --primary-dark: #004d99;
    --primary-light: #3399ff;
    --secondary: #00c9b7;
    --accent: #ff6b35;
    --dark: #1a1a2e;
    --dark-light: #16213e;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #0066cc 0%, #00c9b7 100%);
    --gradient-hero: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; font-size: 16px; line-height: 1.6; color: var(--gray-800); background-color: var(--white); overflow-x: hidden; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; }

.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); box-shadow: var(--shadow-sm); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.4rem; }
.logo-icon { font-size: 1.8rem; }
.logo-text { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-weight: 500; color: var(--gray-700); position: relative; padding: 8px 0; }
.nav-links a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--gradient-primary); transition: var(--transition); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 5px; }
.mobile-menu-btn span { display: block; width: 25px; height: 2px; background: var(--gray-700); transition: var(--transition); }

.hero { position: relative; min-height: 100vh; display: flex; align-items: center; background: var(--gradient-hero); color: var(--white); overflow: hidden; padding-top: 70px; }
.hero-bg { position: absolute; inset: 0; background-image: radial-gradient(circle at 20% 50%, rgba(0, 201, 183, 0.15) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(0, 102, 204, 0.2) 0%, transparent 40%), radial-gradient(circle at 40% 80%, rgba(255, 107, 53, 0.1) 0%, transparent 40%); }
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; margin: 0 auto; padding: 60px 20px; }
.hero-title { font-size: clamp(2.5rem, 6vw, 4rem); font-weight: 700; line-height: 1.2; margin-bottom: 24px; }
.gradient-text { background: linear-gradient(135deg, #00c9b7 0%, #3399ff 50%, #00c9b7 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 1.25rem; color: rgba(255,255,255,0.85); margin-bottom: 32px; }
.hero-features { display: flex; justify-content: center; gap: 32px; margin-bottom: 40px; flex-wrap: wrap; }
.feature-item { display: flex; align-items: center; gap: 8px; font-size: 1rem; color: rgba(255,255,255,0.9); }
.feature-icon { color: var(--secondary); font-weight: bold; }
.hero-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; font-size: 1rem; font-weight: 600; border-radius: var(--radius-full); cursor: pointer; transition: var(--transition); border: none; }
.btn-primary { background: var(--gradient-primary); color: var(--white); box-shadow: 0 4px 20px rgba(0, 102, 204, 0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 30px rgba(0, 102, 204, 0.5); }
.btn-secondary { background: rgba(255,255,255,0.1); color: var(--white); border: 2px solid rgba(255,255,255,0.3); }
.btn-secondary:hover { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.5); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-full { width: 100%; }

.wave-decoration { position: absolute; bottom: 0; left: 0; right: 0; color: var(--white); line-height: 0; }
.wave-decoration svg { width: 100%; height: 80px; }

.section-header { text-align: center; margin-bottom: 60px; }
.section-tag { display: inline-block; padding: 6px 16px; background: linear-gradient(135deg, rgba(0, 102, 204, 0.1) 0%, rgba(0, 201, 183, 0.1) 100%); color: var(--primary); font-size: 0.875rem; font-weight: 600; border-radius: var(--radius-full); margin-bottom: 16px; }
.section-title { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 700; color: var(--dark); margin-bottom: 16px; }
.section-desc { font-size: 1.125rem; color: var(--gray-600); max-width: 600px; margin: 0 auto; }

.services { padding: 100px 0; background: var(--gray-100); }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.service-card { position: relative; background: var(--white); padding: 40px 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); transition: var(--transition); }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
.service-card.featured { background: var(--gradient-primary); color: var(--white); }
.featured-badge { position: absolute; top: 20px; right: 20px; padding: 4px 12px; background: var(--accent); color: var(--white); font-size: 0.75rem; font-weight: 600; border-radius: var(--radius-full); }
.service-icon { font-size: 3rem; margin-bottom: 20px; }
.service-card h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 12px; }
.service-card p { color: var(--gray-600); margin-bottom: 20px; line-height: 1.7; }
.service-card.featured p { color: rgba(255,255,255,0.85); }
.service-list { display: flex; flex-direction: column; gap: 10px; }
.service-list li { position: relative; padding-left: 20px; font-size: 0.95rem; color: var(--gray-700); }
.service-card.featured .service-list li { color: rgba(255,255,255,0.9); }
.service-list li::before { content: '✓'; position: absolute; left: 0; color: var(--secondary); font-weight: bold; }
.service-card.featured .service-list li::before { color: rgba(255,255,255,0.8); }

.languages { padding: 100px 0; }
.languages-showcase { display: flex; flex-direction: column; gap: 40px; }
.language-category h3 { font-size: 1.25rem; font-weight: 600; color: var(--dark); margin-bottom: 16px; text-align: center; }
.language-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.lang-tag { padding: 10px 20px; background: var(--gray-100); color: var(--gray-700); border-radius: var(--radius-full); font-size: 0.95rem; font-weight: 500; transition: var(--transition); cursor: default; }
.lang-tag:hover { background: var(--gray-200); }
.lang-tag.hot { background: var(--gradient-primary); color: var(--white); }

.stats { padding: 80px 0; background: var(--gradient-hero); color: var(--white); }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; text-align: center; }
.stat-number { font-size: clamp(2.5rem, 5vw, 3.5rem); font-weight: 700; background: linear-gradient(135deg, #00c9b7 0%, #3399ff 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 8px; }
.stat-label { font-size: 1.125rem; color: rgba(255,255,255,0.8); }

.process { padding: 100px 0; background: var(--gray-100); }
.process-timeline { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; position: relative; }
.process-step { position: relative; background: var(--white); padding: 40px 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); text-align: center; }
.step-number { display: inline-flex; align-items: center; justify-content: center; width: 60px; height: 60px; background: var(--gradient-primary); color: var(--white); font-size: 1.5rem; font-weight: 700; border-radius: 50%; margin-bottom: 20px; }
.step-content h3 { font-size: 1.25rem; font-weight: 600; color: var(--dark); margin-bottom: 12px; }
.step-content p { color: var(--gray-600); font-size: 0.95rem; }

.articles-preview { padding: 100px 0; }
.articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; margin-bottom: 40px; }
.article-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); transition: var(--transition); }
.article-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); }
.article-image { height: 200px; overflow: hidden; }
.article-image img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.article-card:hover .article-image img { transform: scale(1.05); }
.article-content { padding: 24px; }
.article-category { display: inline-block; padding: 4px 12px; background: rgba(0, 102, 204, 0.1); color: var(--primary); font-size: 0.8rem; font-weight: 600; border-radius: var(--radius-full); margin-bottom: 12px; }
.article-content h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; line-height: 1.4; }
.article-content h3 a:hover { color: var(--primary); }
.article-content p { color: var(--gray-600); font-size: 0.95rem; margin-bottom: 16px; line-height: 1.6; }
.article-meta { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--gray-500); }
.articles-more { text-align: center; }

.contact { padding: 100px 0; background: var(--gray-100); }
.contact-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact-info h2 { font-size: 2rem; font-weight: 700; color: var(--dark); margin: 16px 0; }
.contact-info > p { color: var(--gray-600); margin-bottom: 32px; }
.contact-methods { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon { font-size: 2rem; }
.contact-item strong { display: block; font-weight: 600; color: var(--dark); margin-bottom: 4px; }
.contact-item p { color: var(--gray-600); font-size: 0.95rem; }
.contact-form-wrapper { background: var(--white); padding: 40px; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-weight: 500; color: var(--gray-700); font-size: 0.95rem; }
.form-group input, .form-group select, .form-group textarea { padding: 14px 16px; border: 1px solid var(--gray-300); border-radius: var(--radius-md); font-size: 1rem; font-family: inherit; transition: var(--transition); background: var(--white); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.footer { background: var(--dark); color: var(--white); padding: 80px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 60px; }
.footer-brand p { color: rgba(255,255,255,0.7); margin: 20px 0; line-height: 1.7; }
.social-links { display: flex; gap: 16px; }
.social-links a { font-size: 1.5rem; transition: var(--transition); }
.social-links a:hover { transform: scale(1.2); }
.footer-links h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 24px; }
.footer-links ul { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { color: rgba(255,255,255,0.7); font-size: 0.95rem; }
.footer-links a:hover { color: var(--secondary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); }
.footer-bottom p { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer-legal { display: flex; gap: 24px; }
.footer-legal a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer-legal a:hover { color: var(--white); }

@media (max-width: 992px) { .contact-wrapper { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 768px) { .nav-links { display: none; position: absolute; top: 70px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 20px; gap: 16px; box-shadow: var(--shadow-lg); } .nav-links.active { display: flex; } .mobile-menu-btn { display: flex; } .hero-features { gap: 20px; } .form-row { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr; text-align: center; } .social-links { justify-content: center; } .footer-bottom { flex-direction: column; gap: 16px; text-align: center; } .footer-legal { flex-wrap: wrap; justify-content: center; } }
@media (max-width: 480px) { .hero-buttons { flex-direction: column; width: 100%; } .btn { width: 100%; } .contact-form-wrapper { padding: 24px; } }