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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-base);
            background: var(--bg);
            color: var(--text);
            font-size: var(--fs-base);
            line-height: 1.85;
            padding-bottom: calc(var(--sticky-phone-h) + env(safe-area-inset-bottom));
            overflow-x: hidden;
            width: 100%;
        }

        img,
        svg {
            display: block;
            max-width: 100%;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        ul {
            list-style: none;
        }

        button {
            font-family: inherit;
        }

        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 clamp(1rem, 3vw, 1.3rem);
            width: 100%;
        }

        :focus-visible {
            outline: 3px solid var(--accent-500);
            outline-offset: 2px;
            border-radius: var(--r-sm);
        }

        .skip-link {
            position: absolute;
            right: -999px;
            top: 0;
            background: var(--primary-800);
            color: #fff;
            padding: 0.8rem 1.2rem;
            z-index: 100;
            border-radius: 0 0 var(--r-sm) var(--r-sm);
            font-weight: 700;
            font-size: var(--fs-sm);
        }

        .skip-link:focus {
            right: var(--sp-3);
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }

            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

        /* ---------- Header ---------- */
        header {
            position: sticky;
            top: 0;
            z-index: 40;
            background: rgb(255, 255, 255);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--sp-2);
            padding: var(--sp-2) 0;
            min-height: 64px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: var(--sp-2);
            font-weight: 800;
            font-size: var(--fs-md);
            color: var(--primary-800);
            flex-shrink: 0;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: var(--r-sm);
            background: var(--primary-600);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-on-dark);
            font-weight: 900;
            font-size: var(--fs-xs);
            flex-shrink: 0;
        }

        .nav-links {
            display: none;
            gap: clamp(1rem, 2vw, 1.8rem);
            font-weight: 600;
            font-size: var(--fs-sm);
            color: var(--text-secondary);
            white-space: nowrap;
        }

        @media (min-width: 900px) {
            .nav-links {
                display: flex;
            }
        }

        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: var(--primary-600);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: var(--sp-2);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--accent-500);
            color: #fff;
            font-weight: 700;
            font-size: var(--fs-xs);
            padding: 0.6rem 1rem;
            min-height: var(--touch);
            border-radius: var(--r-pill);
            box-shadow: var(--shadow-accent);
            transition: transform var(--transition), background var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--accent-600);
            transform: translateY(-1px);
        }

        /* موبایل: منوی همبرگری بدون جاوااسکریپت با details */
        .mobile-menu {
            display: block;
        }

        @media (min-width: 900px) {
            .mobile-menu {
                display: none;
            }
        }

        .mobile-menu summary {
            list-style: none;
            cursor: pointer;
            width: var(--touch);
            height: var(--touch);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--r-sm);
            background: var(--primary-50);
            color: var(--primary-700);
            font-size: 1.2rem;
        }

        .mobile-menu summary::-webkit-details-marker {
            display: none;
        }

        .mobile-menu[open] summary {
            background: var(--primary-100);
        }

        .mobile-panel {
            position: absolute;
            inset-inline: 0;
            top: 100%;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: var(--sp-3);
            display: flex;
            flex-direction: column;
            gap: var(--sp-2);
        }

        .mobile-panel a {
            font-weight: 700;
            font-size: var(--fs-sm);
            padding: 0.7rem 0.4rem;
            min-height: var(--touch);
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--border-soft);
        }

        /* ---------- Hero ---------- */
        .hero {
            position: relative;
            padding: var(--sp-5) 0 var(--sp-5);
            background: radial-gradient(1100px 480px at 85% -15%, var(--primary-100) 0%, transparent 60%), var(--bg);
        }

        .breadcrumb {
            font-size: var(--fs-2xs);
            color: var(--text-muted);
            margin-bottom: var(--sp-3);
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem;
            align-items: center;
        }

        .breadcrumb a {
            color: var(--primary-600);
            font-weight: 600;
        }

        .breadcrumb span[aria-hidden] {
            color: var(--text-muted);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--trust-100);
            color: var(--trust-600);
            font-weight: 700;
            font-size: var(--fs-2xs);
            padding: 0.45rem 0.9rem;
            border-radius: var(--r-pill);
            margin-bottom: var(--sp-3);
        }

        .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--trust-500);
            animation: pulse 1.8s infinite;
            flex-shrink: 0;
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(46, 143, 88, .55);
            }

            70% {
                box-shadow: 0 0 0 9px rgba(46, 143, 88, 0);
            }

            100% {
                box-shadow: 0 0 0 0 rgba(46, 143, 88, 0);
            }
        }

        h1 {
            font-size: var(--fs-3xl);
            font-weight: 900;
            line-height: 1.3;
            color: var(--primary-900);
            max-width: 22ch;
            letter-spacing: -0.01em;
        }

        h1 .hl {
            color: var(--accent-600);
        }

        .hero-lead {
            margin-top: var(--sp-3);
            font-size: var(--fs-md);
            color: var(--text-secondary);
            max-width: 68ch;
        }

        .hero-lead strong {
            color: var(--primary-800);
        }

        .hero-actions {
            margin-top: var(--sp-4);
            display: flex;
            flex-wrap: wrap;
            gap: var(--sp-2);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 800;
            font-size: var(--fs-sm);
            padding: 0.95rem 1.6rem;
            min-height: var(--touch);
            border-radius: var(--r-pill);
            border: none;
            cursor: pointer;
            transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

        .btn-accent {
            background: var(--accent-500);
            color: #fff;
            box-shadow: var(--shadow-accent);
        }

        .btn-accent:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
        }

        .btn-primary-outline {
            background: var(--surface);
            color: var(--primary-700);
            border: 1.5px solid var(--primary-200);
            box-shadow: var(--shadow-sm);
        }

        .btn-primary-outline:hover {
            border-color: var(--primary-400);
            transform: translateY(-2px);
        }

        .quick-jump {
            margin-top: var(--sp-4);
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .quick-jump a {
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: var(--fs-xs);
            padding: 0.5rem 0.9rem;
            border-radius: var(--r-pill);
            min-height: var(--touch);
            display: flex;
            align-items: center;
            transition: border-color var(--transition), color var(--transition);
        }

        .quick-jump a:hover {
            border-color: var(--primary-400);
            color: var(--primary-700);
        }

        /* ---------- Section shells ---------- */
        section {
            padding: var(--sp-6) 0;
            scroll-margin-top: 80px;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-head {
            max-width: 68ch;
            margin-bottom: var(--sp-5);
        }

        .section-head .eyebrow {
            background: var(--primary-50);
            color: var(--primary-600);
        }

        h2 {
            font-size: var(--fs-2xl);
            font-weight: 800;
            color: var(--primary-900);
            line-height: 1.35;
        }

        h2+p {
            margin-top: var(--sp-2);
            color: var(--text-secondary);
            font-size: var(--fs-md);
        }

        h3 {
            font-size: var(--fs-lg);
            font-weight: 800;
            color: var(--primary-800);
            margin-bottom: var(--sp-2);
        }

        p {
            max-width: 75ch;
        }

        /* ---------- Service module (فرمت مقاله‌ای برای هر سرویس) ---------- */
        .service-module {
            display: grid;
            gap: var(--sp-4);
            padding: var(--sp-5) 0;
            border-top: 1px solid var(--border);
        }

        .service-module:first-of-type {
            border-top: none;
            padding-top: 0;
        }

        @media (min-width: 880px) {
            .service-module {
                grid-template-columns: 1fr 1.3fr;
                align-items: start;
            }
        }

        .service-intro-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--r-md);
            background: var(--primary-600);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: var(--sp-2);
        }

        .service-side {
            position: static;
        }

        @media (min-width: 880px) {
            .service-side {
                position: sticky;
                top: 90px;
            }
        }

        .service-side .pain {
            color: var(--text-secondary);
            font-size: var(--fs-sm);
            margin-top: var(--sp-2);
        }

        .service-side .warranty-box {
            margin-top: var(--sp-3);
            background: var(--trust-100);
            color: var(--trust-600);
            font-weight: 700;
            font-size: var(--fs-xs);
            padding: 0.8rem 1rem;
            border-radius: var(--r-md);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sub-block {
            margin-bottom: var(--sp-4);
        }

        .sub-block:last-child {
            margin-bottom: 0;
        }

        .symptom-list,
        .kw-list {
            display: grid;
            gap: 0.6rem;
            grid-template-columns: 1fr;
            margin-top: var(--sp-2);
        }

        @media (min-width: 520px) {
            .symptom-list {
                grid-template-columns: 1fr 1fr;
            }
        }

        .symptom-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            background: var(--surface);
            border: 1px solid var(--border-soft);
            border-radius: var(--r-sm);
            padding: 0.65rem 0.8rem;
            font-size: var(--fs-sm);
            color: var(--text);
        }

        .symptom-list li .ico {
            color: var(--danger);
            flex-shrink: 0;
        }

        .process-list {
            counter-reset: step;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
            margin-top: var(--sp-2);
        }

        .process-list li {
            display: flex;
            gap: 0.8rem;
            align-items: flex-start;
            font-size: var(--fs-sm);
            color: var(--text-secondary);
        }

        .process-list li::before {
            counter-increment: step;
            content: counter(step);
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            background: var(--primary-800);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: var(--fs-xs);
        }

        .chip-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: var(--sp-2);
        }

        .chip {
            background: var(--primary-50);
            color: var(--primary-700);
            font-size: var(--fs-2xs);
            font-weight: 700;
            padding: 0.4rem 0.8rem;
            border-radius: var(--r-pill);
        }

        .chip-warn {
            background: var(--accent-100);
            color: var(--accent-700);
        }

        .coverage .chip {
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-weight: 600;
        }

        .coverage .chip.karaj {
            background: var(--accent-100);
            color: var(--accent-700);
            border-color: transparent;
        }

        .coverage {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .service-cta-row {
            margin-top: var(--sp-3);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: var(--sp-2);
        }

        .btn-sm {
            font-size: var(--fs-xs);
            font-weight: 700;
            padding: 0.7rem 1.1rem;
            min-height: var(--touch);
            border-radius: var(--r-pill);
            background: var(--accent-500);
            color: #fff;
            transition: background var(--transition);
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
        }

        .btn-sm:hover {
            background: var(--accent-600);
        }

        /* ---------- Why us ---------- */
        .why-us-panel {
            background: var(--primary-800);
            border-radius: var(--r-lg);
            padding: var(--sp-5) clamp(1.2rem, 4vw, 2.5rem);
            color: var(--text-on-dark);
        }

        .why-us-panel .section-head h2 {
            color: #fff;
        }

        .why-us-panel .section-head p {
            color: var(--text-on-dark-muted);
        }

        .why-us-panel .eyebrow {
            background: rgba(255, 255, 255, .1);
            color: var(--accent-300);
        }

        .why-grid {
            display: grid;
            gap: var(--sp-3);
            grid-template-columns: 1fr;
        }

        @media (min-width: 620px) {
            .why-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        .why-item {
            display: flex;
            gap: var(--sp-2);
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .09);
            border-radius: var(--r-md);
            padding: var(--sp-3);
        }

        .why-item .check {
            width: 30px;
            height: 30px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--trust-500);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: var(--fs-sm);
        }

        .why-item b {
            display: block;
            font-size: var(--fs-sm);
            font-weight: 700;
            margin-bottom: 0.2rem;
        }

        .why-item span {
            font-size: var(--fs-xs);
            color: var(--text-on-dark-muted);
        }

        .stats-row {
            margin-top: var(--sp-5);
            display: flex;
            flex-wrap: wrap;
            gap: var(--sp-4);
            padding-top: var(--sp-4);
            border-top: 1px dashed rgba(255, 255, 255, .15);
        }

        .stat b {
            font-size: var(--fs-xl);
            font-weight: 900;
            color: var(--accent-300);
            display: block;
        }

        .stat span {
            font-size: var(--fs-xs);
            color: var(--text-on-dark-muted);
        }

        /* ---------- FAQ ---------- */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--sp-2);
            max-width: 78ch;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border-soft);
            border-radius: var(--r-md);
            overflow: hidden;
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--sp-2);
            padding: var(--sp-3);
            font-weight: 700;
            color: var(--primary-800);
            font-size: var(--fs-sm);
            min-height: var(--touch);
        }

        .faq-item summary h3 {
            font-size: inherit;
            color: inherit;
            font-weight: inherit;
            margin: 0;
        }

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

        .faq-item summary .plus {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--primary-50);
            color: var(--primary-600);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 1.1rem;
            transition: transform var(--transition), background var(--transition);
        }

        .faq-item[open] summary .plus {
            transform: rotate(45deg);
            background: var(--accent-500);
            color: #fff;
        }

        .faq-item p {
            padding: 0 var(--sp-3) var(--sp-3);
            color: var(--text-secondary);
            font-size: var(--fs-sm);
        }

        /* ---------- Final CTA ---------- */
        .final-cta {
            text-align: center;
            background: linear-gradient(160deg, var(--primary-700), var(--primary-900));
            border-radius: var(--r-lg);
            padding: var(--sp-6) clamp(1rem, 5vw, 2rem);
            color: var(--text-on-dark);
        }

        .final-cta h2 {
            color: #fff;
        }

        .final-cta p {
            color: var(--text-on-dark-muted);
            max-width: 50ch;
            margin: var(--sp-2) auto var(--sp-4);
        }

        .final-cta .hero-actions {
            justify-content: center;
        }

        /* ---------- About ---------- */
        .about-wrap {
            display: grid;
            gap: var(--sp-4);
        }

        @media (min-width: 780px) {
            .about-wrap {
                grid-template-columns: 1.2fr 1fr;
                align-items: center;
            }
        }

        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: var(--sp-2);
            margin-top: var(--sp-3);
        }

        .badge-list .badge {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: var(--fs-2xs);
            font-weight: 700;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border);
            padding: 0.5rem 0.9rem;
            border-radius: var(--r-pill);
            min-height: var(--touch);
        }

        .about-card {
            background: var(--surface);
            border: 1px solid var(--border-soft);
            border-radius: var(--r-lg);
            padding: var(--sp-4);
            box-shadow: var(--shadow-sm);
        }

        .about-row {
            display: flex;
            gap: var(--sp-2);
            padding: 0.65rem 0;
            border-bottom: 1px solid var(--border-soft);
            font-size: var(--fs-sm);
            align-items: flex-start;
        }

        .about-row:last-child {
            border-bottom: none;
        }

        .about-row .ic {
            flex-shrink: 0;
        }

        /* ---------- Footer ---------- */
        footer {
            background: var(--primary-900);
            color: var(--text-on-dark-muted);
            padding: var(--sp-5) 0;
            font-size: var(--fs-sm);
        }

        .footer-grid {
            display: grid;
            gap: var(--sp-4);
            grid-template-columns: 1fr;
        }

        @media (min-width: 780px) {
            .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr;
            }
        }

        footer h5 {
            color: #fff;
            font-size: var(--fs-sm);
            margin-bottom: var(--sp-2);
            font-weight: 700;
        }

        footer ul li {
            margin-bottom: 0.5rem;
        }

        footer address {
            font-style: normal;
        }

        .footer-bottom {
            margin-top: var(--sp-4);
            padding-top: var(--sp-3);
            border-top: 1px solid rgba(255, 255, 255, .08);
            font-size: var(--fs-2xs);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: var(--sp-2);
        }

        /* ---------- Sticky mobile call bar ---------- */
        .sticky-bar {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            height: var(--sticky-phone-h);
            padding-bottom: env(safe-area-inset-bottom);
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: 0 -8px 24px rgba(9, 58, 79, .12);
            display: flex;
            z-index: 50;
        }

        .sticky-bar a {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 800;
            font-size: var(--fs-sm);
            min-height: var(--touch);
        }

        .sticky-bar .call {
            color: var(--primary-700);
        }

        .sticky-bar .book {
            background: var(--accent-500);
            color: #fff;
        }

        /* ---------- Small phone tightening ---------- */
        @media (max-width: 380px) {
            :root {
                --sticky-phone-h: 56px;
            }

            .btn,
            .btn-sm {
                padding-inline: 1.1rem;
            }
        }

        /* ---------- Print ---------- */
        @media print {

            .sticky-bar,
            header,
            .quick-jump {
                display: none !important;
            }
        }