:root {
    --primary-color: #2D8CF0;
    --text-color: #333;
    --light-text: #666;
    --border-color: #EEE;
    --bg-color: #F5F7FA;
    --white: #FFF;
    --success: #00B42A;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; font-family: 'Segoe UI', Tahoma, sans-serif; }
.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }
.mt-30 { margin-top: 30px; }

/* Header */
header { background: var(--white); box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; }
.header-content { display: flex; justify-content: space-between; align-items: center; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: var(--primary-color); }
.logo-icon { width: 32px; height: 32px; background: var(--primary-color); border-radius: 6px; display: flex; align-items: center; justify-content: center; color: white; }
.header-actions { display: flex; align-items: center; gap: 25px; }
nav ul { display: flex; list-style: none; gap: 25px; }
nav a { text-decoration: none; color: var(--text-color); font-weight: 500; transition: var(--transition); }
nav a:hover { color: var(--primary-color); }
.contact-btn { background: var(--primary-color); color: white; border: none; padding: 6px 14px; border-radius: 4px; cursor: pointer; }

/* Hero */
.hero { background: linear-gradient(135deg, #f5f7fa 0%, #e4eaf1 100%); padding: 60px 0; text-align: center; }
.hero h1 { font-size: 32px; margin-bottom: 15px; }
.hero h1 span { color: var(--primary-color); }
.hero p { color: var(--light-text); margin-bottom: 25px; }

/* Buttons */
.btn { padding: 10px 25px; border-radius: 4px; font-weight: 600; cursor: pointer; transition: var(--transition); text-decoration: none; display: inline-block; border: none; }
.btn-primary { background: var(--primary-color); color: white; }
.btn-secondary { background: var(--white); color: var(--primary-color); border: 1px solid var(--primary-color); }
.btn-sm { padding: 4px 12px; font-size: 13px; margin-left: 12px; }
.btn-full { width: 100%; text-align: center; margin-top: 10px; }
.btn-xs { padding: 5px 15px; font-size: 13px; }

/* Sections & Cards */
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 26px; position: relative; display: inline-block; }
.section-title h2:after { content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%); width: 50px; height: 2px; background: var(--primary-color); }

.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 25px; padding: 50px 0; }
.feature-card { background: var(--white); padding: 25px; border-radius: 6px; box-shadow: 0 3px 10px rgba(0,0,0,0.05); }
.feature-icon { width: 50px; height: 50px; background: rgba(45, 140, 240, 0.1); border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 15px; color: var(--primary-color); font-size: 20px; }

/* Process Steps */
.process-steps { display: flex; justify-content: space-between; position: relative; margin-top: 30px; }
.process-steps:before { content: ''; position: absolute; top: 25px; left: 40px; right: 40px; height: 2px; background: var(--border-color); z-index: 1; }
.step { flex: 1; text-align: center; z-index: 2; }
.step.active .step-progress-label { color: var(--success); }
.circle-bg { stroke: #EEE; stroke-width: 6; fill: none; }
.circle-active { stroke: var(--success); stroke-width: 6; fill: none; stroke-dasharray: 138.2; transition: 0.5s; }
.step-progress { width: 50px; height: 50px; margin: 0 auto 15px; position: relative; }
.step-progress-label { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 20px; font-weight: 700; color: #ccc; }

/* Remote section */
.connection-remote-container { display: flex; gap: 30px; padding: 50px 0; }
.connection-section, .remote-section { flex: 1; background: var(--white); border-radius: 8px; padding: 25px; box-shadow: 0 3px 10px rgba(0,0,0,0.05); }
.video-container { width: 100%; border-radius: 6px; overflow: hidden; background: #000; }
.status-badge { margin-top: 15px; text-align: center; color: var(--primary-color); font-weight: 600; font-size: 15px; }
.remote-option { border: 1px solid var(--border-color); border-radius: 6px; padding: 15px; margin-bottom: 15px; }
.remote-option h4 { display: flex; justify-content: space-between; margin-bottom: 10px; }
.price { color: var(--primary-color); font-weight: 700; }

/* FAQ */
.faq { padding: 70px 0; background: var(--white); }
.faq-container { max-width: 700px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border-color); margin-bottom: 10px; border-radius: 6px; }
.faq-question { padding: 12px 15px; cursor: pointer; display: flex; justify-content: space-between; font-weight: 500; }
.faq-question:after { content: '+'; color: var(--primary-color); }
.faq-item.active .faq-question:after { content: '-'; }
.faq-answer { padding: 0 15px; max-height: 0; overflow: hidden; transition: 0.3s; color: var(--light-text); font-size: 14px; }
.faq-item.active .faq-answer { padding: 15px; max-height: 400px; }
.faq-img { max-width: 100%; width: 350px; border-radius: 8px; margin: 10px 0; }

/* Modals */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 1000; opacity: 0; visibility: hidden; transition: 0.3s; }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal { background: white; border-radius: 6px; width: 90%; max-width: 400px; }
.modal-header { padding: 15px 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; }
.modal-body { padding: 20px; }
.qr-code { max-width: 220px; border-radius: 8px; }
.download-item { display: flex; justify-content: space-between; padding: 12px; border: 1px solid var(--border-color); border-radius: 4px; align-items: center; margin-bottom: 10px; }
.alert-info { padding: 10px; background: rgba(255,125,0,0.1); border-radius: 4px; font-size: 13px; }

/* Footer */
footer { background: #1D2129; color: #86909C; padding: 20px 0; text-align: center; }

@media (max-width: 768px) {
    .connection-remote-container, .process-steps { flex-direction: column; align-items: center; }
    .process-steps:before { display: none; }
    .step { margin-bottom: 20px; }
    nav ul { display: none; }
}