/* ==============================================================
   THIẾT LẬP CHUNG & BIẾN MÀU (MODERN UI)
   ============================================================== */
:root {
    --primary: #00A8FF;       /* Xanh công nghệ (Tech Blue) */
    --primary-dark: #0097e6;
    --secondary: #192A56;     /* Xanh đen sang trọng */
    --bg-color: #F5F6FA;      /* Nền xám nhạt hiện đại */
    --white: #FFFFFF;
    --text-main: #2F3640;
    --text-muted: #718093;
    --shadow-sm: 0 4px 6px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 40px rgba(0,0,0,0.12);
    --radius: 16px;
    --zalo: #0068FF;
    --hotline: #E84118;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Roboto', sans-serif; }
body { background-color: var(--bg-color); color: var(--text-main); line-height: 1.6; -webkit-font-smoothing: antialiased; }
.container { max-width: 1200px; margin: auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; transition: 0.3s ease; }
img { max-width: 100%; display: block; border-radius: 8px; }

/* ==============================================================
   HEADER (GLASSMORPHISM)
   ============================================================== */
header {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    padding: 15px 0;
}
.header-flex { display: flex; justify-content: space-between; align-items: center; }
.logo a { font-size: 24px; font-weight: 900; color: var(--secondary); letter-spacing: -0.5px; }
.logo span { color: var(--primary); }
.header-contact { display: flex; gap: 15px; align-items: center; }
.header-btn {
    background: var(--primary); color: var(--white);
    padding: 10px 20px; border-radius: 50px; font-weight: bold;
    box-shadow: var(--shadow-sm);
}
.header-btn:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ==============================================================
   MODERN HERO SECTION
   ============================================================== */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #192A56 0%, #273c75 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(0,168,255,0.1) 0%, transparent 60%);
    z-index: 0;
}
.hero-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; position: relative; z-index: 1;
}
.hero-tag { display: inline-block; background: rgba(255,255,255,0.1); padding: 6px 15px; border-radius: 50px; font-size: 14px; margin-bottom: 20px; backdrop-filter: blur(5px); border: 1px solid rgba(255,255,255,0.2); }
.hero-title { font-size: 46px; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
.hero-title span { color: #fbc531; }
.hero-desc { font-size: 18px; color: #dcdde1; margin-bottom: 30px; font-weight: 300; }

.cta-group { display: flex; gap: 15px; flex-wrap: wrap; }
.btn { padding: 16px 32px; border-radius: 50px; font-weight: bold; font-size: 16px; display: flex; align-items: center; gap: 10px; cursor: pointer; border: none; }
.btn-primary { background: var(--primary); color: var(--white); box-shadow: 0 8px 20px rgba(0, 168, 255, 0.4); }
.btn-zalo { background: var(--zalo); color: var(--white); box-shadow: 0 8px 20px rgba(0, 104, 255, 0.3); }
.btn:hover { transform: translateY(-3px); filter: brightness(1.1); }

.hero-image img { animation: float 6s ease-in-out infinite; filter: drop-shadow(0 20px 30px rgba(0,0,0,0.5)); }
@keyframes float { 0% { transform: translateY(0px); } 50% { transform: translateY(-15px); } 100% { transform: translateY(0px); } }

/* ==============================================================
   PRICING CARDS (THAY CHO ACCORDION CŨ)
   ============================================================== */
.section-header { text-align: center; margin: 80px 0 50px; }
.section-header h2 { font-size: 32px; color: var(--secondary); font-weight: 800; }
.section-header p { color: var(--text-muted); font-size: 16px; margin-top: 10px; }

.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.price-card {
    background: var(--white); border-radius: var(--radius); padding: 30px;
    box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.03); transition: 0.3s;
    position: relative; overflow: hidden;
}
.price-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); }
.price-card.featured::before {
    content: 'HOT'; position: absolute; top: 15px; right: -30px; background: #e1b12c; color: #fff;
    padding: 5px 30px; transform: rotate(45deg); font-weight: bold; font-size: 12px;
}
.price-icon { width: 60px; height: 60px; background: rgba(0,168,255,0.1); color: var(--primary); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 20px; }
.price-card h3 { font-size: 22px; margin-bottom: 20px; color: var(--secondary); }
.price-list { list-style: none; margin-bottom: 25px; }
.price-list li { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px dashed #eee; font-size: 15px; }
.price-list li span:last-child { font-weight: bold; color: var(--primary-dark); }
.price-card .btn { width: 100%; justify-content: center; padding: 14px; }

/* ==============================================================
   FLEET SHOWCASE
   ============================================================== */
.fleet-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 25px; }
.fleet-item {
    background: var(--white); border-radius: var(--radius); padding: 20px;
    box-shadow: var(--shadow-md); text-align: center;
}
.fleet-img-wrap { height: 160px; display: flex; align-items: center; justify-content: center; margin-bottom: 15px; }
.fleet-img-wrap img { max-height: 100%; object-fit: contain; }
.fleet-item h4 { font-size: 18px; color: var(--secondary); margin-bottom: 5px; }
.fleet-item p { font-size: 14px; color: var(--text-muted); }
.fleet-badge { display: inline-block; background: #e8f5e9; color: #2e7d32; padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: bold; margin-top: 10px; }

/* ==============================================================
   FOOTER & FLOATING BUTTONS
   ============================================================== */
footer { background: var(--white); padding: 60px 0 20px; margin-top: 80px; border-top: 1px solid #eee; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-col h4 { color: var(--secondary); margin-bottom: 20px; font-size: 18px; }
.footer-col p, .footer-col a { color: var(--text-muted); font-size: 14px; margin-bottom: 12px; display: block; }
.footer-col a:hover { color: var(--primary); padding-left: 5px; }
.footer-bottom { border-top: 1px solid #eee; padding-top: 20px; text-align: center; color: var(--text-muted); font-size: 13px; }

.floating-contact { position: fixed; bottom: 30px; right: 30px; display: flex; flex-direction: column; gap: 15px; z-index: 999; }
.float-btn { width: 55px; height: 55px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 24px; box-shadow: 0 10px 20px rgba(0,0,0,0.2); animation: pulse 2s infinite; }
.float-call { background: var(--hotline); }
.float-zalo { background: var(--zalo); }
.float-btn img { width: 30px; }
@keyframes pulse { 0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(232, 65, 24, 0.7); } 70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(232, 65, 24, 0); } 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(232, 65, 24, 0); } }

/* ==============================================================
   RESPONSIVE
   ============================================================== */
@media (max-width: 992px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-title { font-size: 36px; }
    .cta-group { justify-content: center; }
    .hero-image { display: none; /* Ẩn ảnh xe trên mobile để tối ưu màn hình */ }
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer-col a:hover { padding-left: 0; }
}