:root {
    --navy: #0a3d6b;
    --navy-dark: #062a4a;
    --orange: #f7941d;
    --orange-dark: #e07d0a;
    --yellow: #ffc107;
    --blue-light: #4a9fd4;
    --text: #1a2b3c;
    --text-muted: #5a6b7d;
    --bg: #f8fafc;
    --white: #ffffff;
    --shadow: 0 4px 24px rgba(10, 61, 107, 0.08);
    --radius: 12px;
    --header-h: 80px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', system-ui, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    padding-top: var(--header-h);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--orange); }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* Header */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(10,61,107,0.08);
    height: var(--header-h);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
}

.logo-img { height: 56px; width: auto; }

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.main-nav a {
    padding: 0.5rem 0.85rem;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: 8px;
}

.main-nav a.active,
.main-nav a:hover { color: var(--orange); background: rgba(247,148,29,0.08); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px; height: 2px;
    background: var(--navy);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--orange), var(--orange-dark));
    color: var(--white);
    box-shadow: 0 4px 16px rgba(247,148,29,0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(247,148,29,0.45);
    color: var(--white);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-outline:hover { background: var(--white); color: var(--navy); }

.btn-secondary {
    background: var(--navy);
    color: var(--white);
}

.btn-secondary:hover { background: var(--navy-dark); color: var(--white); }

.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }

.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }

/* Hero */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    color: var(--white);
    overflow: hidden;
    margin-top: calc(-1 * var(--header-h));
    padding-top: var(--header-h);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(6,42,74,0.88) 0%, rgba(10,61,107,0.75) 50%, rgba(247,148,29,0.25) 100%);
}

.hero .container {
    position: relative;
    z-index: 1;
    padding: 4rem 0;
    width: 100%;
}

/* benefits-grid ile aynı 3 sütun + gap — kenarlara yapışmaz */
.hero-inner.benefits-grid {
    align-items: center;
    padding-left: 10%;
    padding-right: 10%;
}

.hero-content {
    grid-column: 1 / span 2;
    min-width: 0;
    text-align: left;
}

.hero-content .hero-eyebrow,
.hero-content h1,
.hero-content > p {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1rem;
    max-width: 100%;
}

.hero-content > p {
    font-size: 1.15rem;
    opacity: 0.95;
    margin-bottom: 2rem;
    max-width: 100%;
}

.hero-content .hero-actions {
    justify-content: flex-start;
}

.hero-logo-wrap {
    grid-column: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
}

.hero-logo {
    width: 100%;
    max-width: 360px;
    height: auto;
    max-height: 300px;
    object-fit: contain;
    filter: drop-shadow(0 8px 32px rgba(0, 0, 0, 0.25));
}

.hero-eyebrow {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--yellow);
    margin-bottom: 0.75rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.2);
}

.hero-stat strong { display: block; font-size: 1.75rem; color: var(--yellow); }
.hero-stat span { font-size: 0.9rem; opacity: 0.85; }

/* Sections */
.section { padding: 5rem 0; }
.section-alt { background: var(--white); }
.section-dark {
    background: linear-gradient(180deg, var(--navy-dark), var(--navy));
    color: var(--white);
}

.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    color: var(--navy);
    margin-bottom: 0.75rem;
}

.section-dark .section-header h2 { color: var(--white); }
.section-header p { color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.section-dark .section-header p { color: rgba(255,255,255,0.8); }

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--orange);
    margin-bottom: 0.5rem;
}

/* Cards grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.page-home .cards-grid {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 992px) {
    .page-home .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .page-home .cards-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.25s, box-shadow 0.25s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(10,61,107,0.12);
}

.card-img { height: 200px; object-fit: cover; width: 100%; }
.card-body { padding: 1.5rem; }
.card-body h3 { font-size: 1.15rem; color: var(--navy); margin-bottom: 0.5rem; }
.card-body p { color: var(--text-muted); font-size: 0.95rem; }

/* System types */
.system-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }

.system-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--orange);
}

.system-card h3 { color: var(--navy); margin-bottom: 0.75rem; }
.system-card ul { list-style: none; margin-top: 1rem; }
.system-card li {
    padding: 0.35rem 0;
    padding-left: 1.25rem;
    position: relative;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.system-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--orange);
    font-weight: 700;
}

/* Process steps */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
    counter-reset: step;
}

.process-step {
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 1.75rem;
    position: relative;
    border: 1px solid rgba(255,255,255,0.12);
}

.process-step::before {
    counter-increment: step;
    content: counter(step);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    background: var(--orange);
    color: var(--white);
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 1rem;
}

.process-step h4 { margin-bottom: 0.5rem; }
.process-step p { font-size: 0.9rem; opacity: 0.85; }

/* News */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }

.news-card .card-img { height: 180px; }
.news-date { font-size: 0.8rem; color: var(--orange); font-weight: 600; margin-bottom: 0.35rem; }

/* Quick contact bar */
.quick-bar {
    background: var(--navy);
    color: var(--white);
    padding: 2rem 0;
}

.quick-bar-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.quick-items { display: flex; flex-wrap: wrap; gap: 2rem; }
.quick-item { display: flex; align-items: center; gap: 0.75rem; }
.quick-item svg { flex-shrink: 0; opacity: 0.9; }
.quick-item a { color: var(--white); }
.quick-item a:hover { color: var(--yellow); }

/* About page */
.about-hero {
    background: linear-gradient(135deg, var(--navy-dark), var(--navy));
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.about-hero h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.25rem;
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-image { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.about-image img { width: 100%; height: 400px; object-fit: cover; }

/* Projects */
.project-card { cursor: pointer; }
.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(10,61,107,0.08);
    color: var(--navy);
    border-radius: 6px;
}

.tag-orange { background: rgba(247,148,29,0.15); color: var(--orange-dark); }

/* Gallery modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(6,42,74,0.92);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--white);
    border-radius: var(--radius);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 1rem; right: 1rem;
    width: 40px; height: 40px;
    border: none;
    background: var(--navy);
    color: var(--white);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    line-height: 1;
}

.modal-header { padding: 1.5rem 1.5rem 0; }
.modal-header h3 { color: var(--navy); }
.modal-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
    padding: 1.5rem;
}

.modal-gallery img {
    border-radius: 8px;
    height: 180px;
    object-fit: cover;
    width: 100%;
    cursor: pointer;
}

/* Products */
.brand-logos {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    padding: 2.5rem;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 3rem;
}

.brand-logo {
    height: 48px;
    width: auto;
    max-width: 140px;
    object-fit: contain;
    filter: grayscale(20%);
    opacity: 0.9;
    transition: filter 0.2s, opacity 0.2s;
}

.brand-logo:hover { filter: none; opacity: 1; }

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--navy);
    padding: 0.5rem 1rem;
}

.product-section { margin-bottom: 4rem; }
.product-section h3 {
    font-size: 1.5rem;
    color: var(--navy);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--orange);
    display: inline-block;
}

.product-card .card-img { height: 160px; object-fit: contain; padding: 1rem; background: #f0f4f8; }

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2.5rem;
}

.contact-info-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-info-card h3 { color: var(--navy); margin-bottom: 1.5rem; }

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.contact-item-icon {
    width: 44px; height: 44px;
    background: rgba(247,148,29,0.12);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--orange);
    flex-shrink: 0;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: 0.4rem; font-size: 0.9rem; }

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #dde4ec;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--orange);
}

.form-group textarea { min-height: 120px; resize: vertical; }

/* Quote wizard */
.quote-wizard {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.wizard-steps {
    display: flex;
    background: var(--navy);
}

.wizard-step-indicator {
    flex: 1;
    padding: 1rem;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
    font-weight: 500;
    position: relative;
}

.wizard-step-indicator.active { color: var(--white); background: rgba(247,148,29,0.25); }
.wizard-step-indicator.done { color: var(--yellow); }

.wizard-body { padding: 2rem; }

.wizard-panel { display: none; }
.wizard-panel.active { display: block; }

.device-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 0.75rem;
    align-items: end;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #eee;
}

.device-row label { font-size: 0.8rem; }

.btn-remove {
    background: #fee;
    color: #c33;
    border: none;
    width: 36px; height: 36px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
}

.consumption-summary {
    background: rgba(10,61,107,0.06);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin: 1rem 0;
}

.consumption-summary strong { color: var(--navy); font-size: 1.25rem; }

.project-type-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.project-type-card {
    border: 2px solid #dde4ec;
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.project-type-card:hover { border-color: var(--orange); }
.project-type-card.selected {
    border-color: var(--orange);
    background: rgba(247,148,29,0.08);
}

.project-type-card h4 { color: var(--navy); margin-bottom: 0.5rem; }
.project-type-card p { font-size: 0.85rem; color: var(--text-muted); }

.wizard-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.quote-preview {
    background: #f8fafc;
    border: 1px solid #dde4ec;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.quote-preview h4 { color: var(--navy); margin-bottom: 1rem; }

/* CTA banner */
.cta-banner {
    background: linear-gradient(135deg, var(--orange), var(--orange-dark));
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.cta-banner h2 { font-size: 2rem; margin-bottom: 0.75rem; }
.cta-banner p { margin-bottom: 1.5rem; opacity: 0.95; }
.cta-banner .btn { background: var(--white); color: var(--orange-dark); }
.cta-banner .btn:hover { background: var(--navy); color: var(--white); }

/* Footer */
.site-footer {
    background: var(--navy-dark);
    color: rgba(255,255,255,0.85);
    padding-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
    padding-bottom: 3rem;
}

.footer-logo { height: 64px; width: auto; margin-bottom: 1rem; filter: brightness(1.1); }
.footer-brand p { font-size: 0.9rem; margin-bottom: 1rem; opacity: 0.8; }

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    font-size: 0.9rem;
}

.social-link:hover { background: var(--orange); color: var(--white); }

.site-footer h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.footer-links ul { list-style: none; }
.footer-links a { color: rgba(255,255,255,0.75); font-size: 0.9rem; display: block; padding: 0.25rem 0; }
.footer-links a:hover { color: var(--yellow); }

.footer-contact p { font-size: 0.9rem; margin-bottom: 0.5rem; }
.footer-contact a { color: rgba(255,255,255,0.85); }

.footer-cta p { font-size: 0.9rem; margin-bottom: 1rem; opacity: 0.85; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 1.25rem 0;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.7;
}

/* Page hero small */
.page-hero {
    background: linear-gradient(135deg, var(--navy-dark), var(--navy));
    color: var(--white);
    padding: 3.5rem 0;
    text-align: center;
}

.page-hero h1 { font-size: 2.25rem; }
.page-hero p { opacity: 0.85; margin-top: 0.5rem; }

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-success { background: #d4edda; color: #155724; }

/* Floating WhatsApp */
.whatsapp-float {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 1500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem 0.75rem 0.85rem;
    background: #25d366;
    color: #fff;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.45), 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

.whatsapp-float:hover {
    color: #fff;
    background: #20bd5a;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 28px rgba(37, 211, 102, 0.5);
}

.whatsapp-float-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.whatsapp-float-label {
    padding-right: 0.15rem;
}

@media (max-width: 480px) {
    .whatsapp-float {
        right: 1rem;
        bottom: 1rem;
        padding: 0.85rem;
        border-radius: 50%;
        width: 56px;
        height: 56px;
        justify-content: center;
    }

    .whatsapp-float-label { display: none; }

    .whatsapp-float-icon {
        width: 30px;
        height: 30px;
    }
}

/* Benefits strip */
.benefits-section {
    padding: 3rem 0;
    background: linear-gradient(135deg, var(--navy-dark), var(--navy));
    color: var(--white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.benefit-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: background 0.25s, transform 0.25s;
}

.benefit-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.benefit-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(247, 148, 29, 0.2);
    color: var(--yellow);
    border-radius: 50%;
}

.benefit-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.65rem;
    line-height: 1.35;
}

.benefit-card p {
    font-size: 0.9rem;
    opacity: 0.85;
    line-height: 1.6;
}

/* ROI calculator */
.roi-calculator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: start;
    background: var(--white);
    border-radius: var(--radius);
    padding: 2.5rem;
    box-shadow: var(--shadow);
}

.roi-calculator-intro h2 {
    color: var(--navy);
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
}

.roi-calculator-intro p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.roi-calculator-form .form-group {
    margin-bottom: 1.25rem;
}

.roi-calculator-form input {
    font-size: 1.25rem;
    padding: 0.85rem 1rem;
}

.roi-results {
    grid-column: 1 / -1;
    padding-top: 1.5rem;
    border-top: 2px solid #eef2f6;
    margin-top: 0.5rem;
}

.roi-results h3 {
    color: var(--navy);
    margin-bottom: 1.25rem;
    font-size: 1.15rem;
}

.roi-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem;
}

.roi-result-item {
    background: var(--bg);
    border-radius: 10px;
    padding: 1.25rem;
    text-align: center;
    border: 1px solid #e8edf2;
}

.roi-result-item.highlight {
    background: rgba(247, 148, 29, 0.08);
    border-color: rgba(247, 148, 29, 0.25);
}

.roi-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.roi-result-item strong {
    display: block;
    font-size: 1.75rem;
    color: var(--navy);
    line-height: 1.2;
}

.roi-result-item.highlight strong { color: var(--orange-dark); }

.roi-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* FAQ */
.faq-section .container { max-width: 880px; }

.faq-list { display: flex; flex-direction: column; gap: 0.75rem; }

.faq-category-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--navy);
    margin: 1.5rem 0 0.75rem;
    padding-bottom: 0.35rem;
    border-bottom: 2px solid var(--orange);
}

.faq-list .faq-category-title:first-child { margin-top: 0; }

.faq-section-footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.faq-section-footer a { font-weight: 600; }

.faq-item {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-item summary {
    padding: 1.15rem 1.25rem;
    font-weight: 600;
    color: var(--navy);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--orange);
    font-weight: 700;
}

.faq-item[open] summary::after { content: '−'; }

.faq-item p {
    padding: 0 1.25rem 1.15rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Product detail blocks */
.product-detail-block {
    margin-bottom: 3rem;
    scroll-margin-top: calc(var(--header-h) + 1rem);
}

.product-detail-block h2 {
    color: var(--navy);
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--orange);
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2rem;
    align-items: start;
}

.product-detail-grid img {
    border-radius: var(--radius);
    width: 100%;
    height: 260px;
    object-fit: cover;
    box-shadow: var(--shadow);
}

.product-detail-block p { color: var(--text-muted); margin-bottom: 1rem; line-height: 1.75; }

.section-alt-inner {
    background: var(--bg);
    padding: 2rem;
    border-radius: var(--radius);
}

.detail-list {
    list-style: none;
    margin-top: 1rem;
}

.detail-list li {
    padding: 0.5rem 0;
    padding-left: 1.25rem;
    position: relative;
    color: var(--text-muted);
}

.detail-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--orange);
    font-weight: 700;
}

.card-body a { font-weight: 600; font-size: 0.9rem; }

.roi-formula-note {
    margin-top: 1.25rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 0.75rem 1rem;
    background: var(--bg);
    border-radius: 8px;
}

/* Responsive */
@media (max-width: 992px) {
    .benefits-grid { grid-template-columns: 1fr; }
    .roi-calculator { grid-template-columns: 1fr; padding: 1.5rem; }
    .product-detail-grid { grid-template-columns: 1fr; }
    .system-cards, .news-grid { grid-template-columns: 1fr; }
    .about-content, .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .project-type-cards { grid-template-columns: 1fr; }
    .device-row { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 992px) {
    .hero-inner.benefits-grid {
        grid-template-columns: 1fr;
        padding-left: 6%;
        padding-right: 6%;
    }

    .hero-content,
    .hero-logo-wrap {
        grid-column: 1;
    }

    .hero-logo-wrap {
        order: -1;
        justify-content: center;
    }

    .hero-logo {
        max-width: 300px;
        max-height: 240px;
    }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .main-nav {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        background: var(--white);
        padding: 1rem;
        box-shadow: var(--shadow);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.3s, opacity 0.3s;
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
    }

    .main-nav ul { flex-direction: column; align-items: stretch; }
    .main-nav a { display: block; padding: 0.75rem; }
    .nav-cta { margin-top: 0.5rem; }
    .nav-cta .btn { width: 100%; }

    .footer-grid { grid-template-columns: 1fr; }
    .quick-bar-inner { flex-direction: column; text-align: center; }
    .quick-items { justify-content: center; }
}