/* === CSS Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --primary: #e94560;
    --primary-dark: #c7374f;
    --secondary: #0f3460;
    --accent: #16213e;
    --bg: #f8f9fa;
    --bg-card: #ffffff;
    --text: #1a1a2e;
    --text-light: #6c757d;
    --border: #e9ecef;
    --shadow: 0 8px 32px rgba(0,0,0,0.08);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --header-height: 72px;
}
[data-theme="dark"] {
    --bg: #0a0a1a;
    --bg-card: #1a1a2e;
    --text: #eaeaea;
    --text-light: #a0a0b0;
    --border: #2a2a3e;
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
}
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img, svg { max-width: 100%; display: block; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { font-size: 2.2rem; font-weight: 700; text-align: center; margin-bottom: 12px; letter-spacing: -0.5px; }
.section-subtitle { text-align: center; color: var(--text-light); font-size: 1.1rem; margin-bottom: 48px; max-width: 600px; margin-left: auto; margin-right: auto; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px; border-radius: 50px; font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff; border: none; cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(233,69,96,0.35); color: #fff; }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.glass {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.12);
}
[data-theme="dark"] .glass {
    background: rgba(0,0,0,0.3);
    border-color: rgba(255,255,255,0.06);
}
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--border);
}
.card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,0,0,0.12); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.text-gradient { background: linear-gradient(135deg, var(--primary), #ff6b6b); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
/* Header */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--header-height);
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    transition: background var(--transition);
}
[data-theme="dark"] .header {
    background: rgba(10,10,26,0.85);
    border-bottom-color: rgba(255,255,255,0.06);
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.5px; }
.logo span { color: var(--primary); }
.nav { display: flex; gap: 32px; align-items: center; }
.nav a { color: var(--text); font-weight: 500; font-size: 0.95rem; position: relative; padding: 4px 0; }
.nav a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--primary); transition: width var(--transition); }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav a.active { color: var(--primary); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.theme-toggle {
    background: none; border: none; font-size: 1.4rem; cursor: pointer;
    padding: 8px; border-radius: 50%; transition: background var(--transition);
    color: var(--text);
}
.theme-toggle:hover { background: rgba(0,0,0,0.06); }
.mobile-menu-btn { display: none; background: none; border: none; font-size: 1.8rem; cursor: pointer; color: var(--text); padding: 8px; }
/* Hero */
.hero {
    min-height: 90vh;
    display: flex; align-items: center;
    background: linear-gradient(135deg, var(--accent) 0%, var(--secondary) 50%, #1a1a2e 100%);
    position: relative; overflow: hidden;
    padding-top: var(--header-height);
}
[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #0a0a1a 0%, #16213e 50%, #0f3460 100%);
}
.hero::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(233,69,96,0.15) 0%, transparent 60%),
                radial-gradient(circle at 80% 50%, rgba(15,52,96,0.2) 0%, transparent 60%);
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-content h1 { font-size: 3.5rem; font-weight: 800; line-height: 1.2; color: #fff; margin-bottom: 20px; letter-spacing: -1px; }
.hero-content h1 span { color: var(--primary); }
.hero-content p { font-size: 1.2rem; color: rgba(255,255,255,0.8); margin-bottom: 32px; max-width: 520px; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-visual svg { width: 100%; max-width: 480px; height: auto; filter: drop-shadow(0 20px 60px rgba(0,0,0,0.3)); }
/* Banner Carousel */
.banner-carousel { position: relative; overflow: hidden; border-radius: var(--radius); margin-bottom: 40px; }
.banner-slide { display: none; animation: fadeIn 0.6s ease; }
.banner-slide.active { display: block; }
.banner-slide img, .banner-slide svg { width: 100%; height: 400px; object-fit: cover; border-radius: var(--radius); }
.banner-dots { display: flex; justify-content: center; gap: 12px; margin-top: 20px; }
.banner-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--border); cursor: pointer; transition: all var(--transition); border: none; }
.banner-dot.active { background: var(--primary); transform: scale(1.2); }
/* Scroll Animation */
.animate-on-scroll { opacity: 0; transform: translateY(40px); transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1); }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); padding: 16px 0; }
.faq-question { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; font-size: 1.1rem; padding: 8px 0; user-select: none; }
.faq-question .icon { transition: transform var(--transition); font-size: 1.2rem; }
.faq-item.open .faq-question .icon { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 16px; color: var(--text-light); }
.faq-item.open .faq-answer { max-height: 300px; padding: 12px 16px 16px; }
/* Back to top */
.back-to-top {
    position: fixed; bottom: 40px; right: 40px; z-index: 999;
    width: 52px; height: 52px; border-radius: 50%;
    background: var(--primary); color: #fff; border: none;
    font-size: 1.6rem; cursor: pointer;
    box-shadow: 0 8px 24px rgba(233,69,96,0.4);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(20px);
    transition: all var(--transition);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(233,69,96,0.5); }
/* Footer */
.footer { background: var(--accent); color: rgba(255,255,255,0.8); padding: 60px 0 20px; }
[data-theme="dark"] .footer { background: #050510; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { color: #fff; margin-bottom: 20px; font-size: 1.1rem; }
.footer a { color: rgba(255,255,255,0.7); display: block; margin-bottom: 8px; font-size: 0.9rem; }
.footer a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; text-align: center; font-size: 0.85rem; }
/* Search */
.search-container { position: relative; }
.search-input { padding: 8px 16px; border-radius: 50px; border: 1px solid var(--border); background: var(--bg-card); color: var(--text); width: 200px; font-size: 0.9rem; transition: width var(--transition); }
.search-input:focus { outline: none; border-color: var(--primary); width: 260px; }
.search-results { position: absolute; top: 100%; left: 0; right: 0; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); max-height: 300px; overflow-y: auto; display: none; z-index: 100; box-shadow: var(--shadow); }
.search-results.show { display: block; }
.search-result-item { padding: 12px 16px; cursor: pointer; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.search-result-item:hover { background: rgba(233,69,96,0.08); }
/* Stat counter */
.stat-number { font-size: 2.8rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
/* Responsive */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero-content p { margin-left: auto; margin-right: auto; }
    .hero-buttons { justify-content: center; }
    .hero-visual { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav { display: none; position: fixed; top: var(--header-height); left: 0; right: 0; background: var(--bg-card); flex-direction: column; padding: 24px; gap: 16px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
    .nav.open { display: flex; }
    .mobile-menu-btn { display: block; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .section { padding: 48px 0; }
    .section-title { font-size: 1.8rem; }
    .hero-content h1 { font-size: 2.2rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .search-input { width: 140px; }
    .search-input:focus { width: 180px; }
    .banner-slide svg { height: 220px; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero-content h1 { font-size: 1.8rem; }
    .stat-number { font-size: 2rem; }
}
/* Keyframes */
@keyframes fadeIn { from { opacity: 0; transform: scale(0.98); } to { opacity: 1; transform: scale(1); } }
@keyframes countUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }