/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0b0e14;
    --bg-secondary: #121821;
    --bg-card: #1a232f;
    --bg-card-hover: #24303f;
    --text-primary: #f0f4fa;
    --text-secondary: #b0c4db;
    --text-muted: #7a8fa8;
    --accent: #f5b342;
    --accent-hover: #e6a130;
    --accent-secondary: #00c9a7;
    --border-color: #2a3649;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.25s ease;
    --font: 'Inter', sans-serif;
    --max-width: 1200px;
    --header-height: 68px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

img {
    max-width: 100%;
    display: block;
}
.page {
    margin: 35px 0 0;
}
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}
.seo-text p {color: var(--text-secondary); max-width: 900px; margin: 16px; line-height: 1.8;}
.seo-text ul {color: var(--text-secondary); max-width: 900px; margin: 16px; line-height: 1.8; list-style: none; padding-left: 0;}
/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    text-align: center;
}

.btn-accent {
    background: var(--accent);
    color: #0b0e14;
    box-shadow: 0 4px 16px rgba(245, 179, 66, 0.3);
}
.btn-accent:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(245, 179, 66, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-green {
    background: var(--accent-secondary);
    color: #0b0e14;
    box-shadow: 0 4px 16px rgba(0, 201, 167, 0.25);
}
.btn-green:hover {
    background: #00b896;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 201, 167, 0.35);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ===== HEADER / NAV ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 14, 20, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(42, 54, 73, 0.4);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    flex-shrink: 0;
}
.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: #0b0e14;
    font-weight: 800;
    font-size: 1.1rem;
}
.logo span {
    color: var(--accent);
}

/* nav desktop */
.nav-list {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
    flex-wrap: wrap;
}
.nav-list a {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
    color: var(--text-secondary);
    white-space: nowrap;
}
.nav-list a:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}
.nav-list a.active {
    color: var(--accent);
    background: rgba(245, 179, 66, 0.08);
}

/* mobile hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px 4px;
}
.nav-toggle span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}
.nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== HERO ===== */
.hero {
    padding: calc(var(--header-height) + 40px) 0 60px;
    background: radial-gradient(ellipse at 70% 20%, #1a2a3a 0%, var(--bg-primary) 70%);
    position: relative;
    overflow: hidden;
}
.hero::after {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(245, 179, 66, 0.06) 0%, transparent 70%);
    pointer-events: none;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 12px;
}
.hero-content h1 .highlight {
    color: var(--accent);
    display: inline-block;
    position: relative;
}
.hero-content .sub {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 8px;
}
.hero-content .delivery-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 201, 167, 0.12);
    border: 1px solid rgba(0, 201, 167, 0.2);
    padding: 10px 20px;
    border-radius: 40px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--accent-secondary);
    margin: 16px 0 24px;
}
.hero-content .delivery-badge svg {
    flex-shrink: 0;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}
.hero-image .mock-cylinder {
    width: 280px;
    height: 380px;
    border-radius: 40px 40px 20px 20px;
    background: linear-gradient(160deg, #2a3a4e, #14202e);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.hero-image .mock-cylinder .valve {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    position: absolute;
    top: -14px;
    box-shadow: 0 0 30px rgba(245, 179, 66, 0.3);
}
.hero-image .mock-cylinder .label {
    font-weight: 700;
    font-size: 1.4rem;
    text-align: center;
    color: var(--text-primary);
    line-height: 1.3;
}
.hero-image .mock-cylinder .label small {
    display: block;
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 6px;
}
.hero-image .mock-cylinder .badge-gas {
    margin-top: 20px;
    background: rgba(245, 179, 66, 0.12);
    padding: 6px 18px;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
/* ===== HERO REDESIGN ===== */
.hero {
    position: relative;
    padding: calc(var(--header-height) + 50px) 0 70px;
    background: radial-gradient(circle at 75% 30%, #152233 0%, var(--bg-primary) 70%);
    overflow: hidden;
    border-bottom: 1px solid rgba(42, 54, 73, 0.5);
}

/* Фоновое неоновое свечение */
.hero-ambient {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}
.hero-ambient--gold {
    top: 5%;
    right: 5%;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(245, 179, 66, 0.18), transparent 70%);
}
.hero-ambient--teal {
    bottom: -10%;
    left: 20%;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(0, 201, 167, 0.12), transparent 70%);
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: center;
}

/* Статус работы 24/7 */
.hero-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 201, 167, 0.08);
    border: 1px solid rgba(0, 201, 167, 0.28);
    color: var(--accent-secondary);
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.2px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-secondary);
    box-shadow: 0 0 0 0 rgba(0, 201, 167, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 201, 167, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 201, 167, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 201, 167, 0);
    }
}

/* Заголовок и описание */
.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -1.2px;
    margin-bottom: 16px;
}
.hero-title .highlight {
    color: var(--accent);
    position: relative;
    text-shadow: 0 0 35px rgba(245, 179, 66, 0.35);
}

.hero-desc {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 580px;
    margin-bottom: 24px;
}

/* Теги УТП */
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
}
.hero-tag-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}
.hero-tag-item svg {
    color: var(--accent);
}

/* Кнопки */
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 36px;
}
.btn-hero {
    padding: 16px 32px;
    font-size: 1.05rem;
    border-radius: 10px;
}

/* Метрики доверия */
.hero-stats {
    display: flex;
    gap: 20px;
    padding-top: 24px;
    border-top: 1px solid rgba(42, 54, 73, 0.7);
}
.stat-card {
    display: flex;
    flex-direction: column;
}
.stat-value {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}
.stat-value .stat-unit {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent);
}
.stat-caption {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ===== ВИЗУАЛЬНАЯ ЗОНА (БАЛЛОН) ===== */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-stage {
    position: relative;
    width: 320px;
    height: 440px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stage-glow {
    position: absolute;
    bottom: -15px;
    width: 260px;
    height: 40px;
    background: radial-gradient(ellipse, rgba(245, 179, 66, 0.45) 0%, rgba(0, 201, 167, 0.15) 50%, transparent 80%);
    filter: blur(12px);
    border-radius: 50%;
}

/* Имитация баллона */
.cylinder-showcase {
    display: flex;
    flex-direction: column;
    align-items: center;
    filter: drop-shadow(0 25px 35px rgba(0, 0, 0, 0.75));
    transition: transform 0.3s ease;
}
.cylinder-showcase:hover {
    transform: translateY(-4px);
}

.cylinder-valve-cap {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: -4px;
    z-index: 2;
}
.valve-head {
    width: 32px;
    height: 18px;
    background: linear-gradient(180deg, #d3972c, #a16e15);
    border-radius: 4px 4px 0 0;
    border: 1px solid #ffcb6b;
}
.valve-nozzle {
    width: 14px;
    height: 12px;
    background: #4a5d75;
}

.cylinder-body {
    width: 170px;
    height: 330px;
    border-radius: 42px 42px 16px 16px;
    background: linear-gradient(135deg, #27374b 0%, #15202c 50%, #0c141d 100%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    box-shadow: inset 2px 0 10px rgba(255, 255, 255, 0.15), inset -8px 0 20px rgba(0, 0, 0, 0.6);
}

.cylinder-highlight {
    position: absolute;
    top: 0;
    left: 20px;
    width: 12px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
    pointer-events: none;
}

.cylinder-content {
    text-align: center;
    position: relative;
    z-index: 2;
}
.cyl-brand {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 4px;
}
.cyl-title {
    display: block;
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -1px;
    color: #ffffff;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.8);
}
.cyl-sub {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-top: 6px;
}
.cyl-spec {
    display: inline-block;
    background: rgba(0, 201, 167, 0.15);
    border: 1px solid rgba(0, 201, 167, 0.3);
    color: var(--accent-secondary);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    margin-top: 14px;
    letter-spacing: 0.8px;
}

.cylinder-bottom-ring {
    position: absolute;
    bottom: 12px;
    width: 80%;
    height: 3px;
    background: rgba(245, 179, 66, 0.35);
    border-radius: 2px;
}

/* Парящие плашки (Floating Badges) */
.floating-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(26, 35, 47, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 18px;
    border-radius: 12px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.5);
    z-index: 3;
    animation: floatAnim 4s ease-in-out infinite alternate;
}

.badge-top-left {
    top: 15%;
    left: -35px;
}
.badge-bottom-right {
    bottom: 12%;
    right: -35px;
    animation-delay: -2s;
}

.floating-badge .badge-icon {
    font-size: 1.4rem;
    line-height: 1;
}
.floating-badge .badge-text strong {
    display: block;
    font-size: 0.88rem;
    color: var(--text-primary);
}
.floating-badge .badge-text span {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.floating-promo-tag {
    position: absolute;
    top: 0;
    right: 20px;
    background: linear-gradient(135deg, #f5b342, #e6a130);
    color: #0b0e14;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 6px 14px;
    border-radius: 30px;
    box-shadow: 0 8px 20px rgba(245, 179, 66, 0.4);
    animation: floatAnim 3.5s ease-in-out infinite alternate-reverse;
}

@keyframes floatAnim {
    0% {
        transform: translateY(0px);
    }
    100% {
        transform: translateY(-8px);
    }
}

/* ===== АДАПТИВНОСТЬ HERO ===== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    .hero-title {
        font-size: 2.7rem;
    }
    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-status-pill,
    .hero-tags,
    .hero-actions,
    .hero-stats {
        justify-content: center;
    }
    .hero-visual {
        margin-top: 10px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: calc(var(--header-height) + 24px);
        padding-bottom: 50px;
    }
    .hero-title {
        font-size: 2.1rem;
        letter-spacing: -0.5px;
    }
    .hero-desc {
        font-size: 0.95rem;
    }
    .hero-actions {
        flex-direction: column;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .hero-stats {
        gap: 14px;
        flex-wrap: wrap;
    }
    .stat-card {
        flex: 1 1 30%;
    }
    .stat-value {
        font-size: 1.35rem;
    }
    .badge-top-left {
        left: 0;
        top: 8%;
    }
    .badge-bottom-right {
        right: 0;
        bottom: 5%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    .hero-stage {
        width: 100%;
        max-width: 290px;
    }
    .cylinder-body {
        width: 145px;
        height: 290px;
    }
    .cyl-title {
        font-size: 2.2rem;
    }
    .floating-badge {
        padding: 8px 12px;
    }
    .floating-badge .badge-text strong {
        font-size: 0.8rem;
    }
    .floating-badge .badge-text span {
        font-size: 0.7rem;
    }
}
/* ===== SECTION TITLES ===== */
.section {
    padding: 60px 0;
}
.section-dark {
    background: var(--bg-secondary);
}
.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}
.section-title .highlight {
    color: var(--accent);
}
.section-sub {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 32px;
}
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
}

/* ===== ADVANTAGES ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.advantage-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: background var(--transition), transform var(--transition), border-color var(--transition);
}
.advantage-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    border-color: var(--accent);
}
.advantage-card .icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
    display: block;
}
.advantage-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.advantage-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== CATALOG ===== */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 24px;
}
.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px 20px 20px;
    transition: background var(--transition), transform var(--transition), border-color var(--transition);
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    border-color: var(--accent);
}
.product-card .product-img {
    width: 100%;
    height: 330px;
    object-fit: contain;
    margin-bottom: 12px;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
}
.product-card .name {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 4px;
}
.product-card .type {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: 12px;
}
.product-card .prices {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin: 8px 0 16px;
}
.product-card .prices .price-item {
    background: rgba(255, 255, 255, 0.04);
    padding: 4px 14px;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 500;
}
.product-card .prices .price-item .label {
    color: var(--text-muted);
    font-weight: 400;
}
.product-card .prices .price-item .value {
    color: var(--text-primary);
    font-weight: 700;
}
.product-card .prices .price-item.sale .value {
    color: var(--accent);
}
.product-card .btn {
    margin-top: auto;
}

/* акция */
.product-card .badge-sale {
    display: inline-block;
    background: var(--accent);
    color: #0b0e14;
    font-weight: 700;
    font-size: 0.7rem;
    text-transform: uppercase;
    padding: 2px 12px;
    border-radius: 40px;
    letter-spacing: 0.3px;
    margin-bottom: 8px;
    align-self: flex-start;
}

/* ===== ACCESSORIES ===== */
.accessories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 12px;
}
.accessory-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    transition: background var(--transition), border-color var(--transition);
}
.accessory-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-secondary);
}
.accessory-card .accessory-img {
    width: 100%;
    height: 330px;
    object-fit: contain;
    margin-bottom: 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
}
.accessory-card h5 {
    font-weight: 600;
    font-size: 1rem;
}
.accessory-card .price {
    color: var(--accent-secondary);
    font-weight: 700;
    font-size: 1.1rem;
    margin: 4px 0 12px;
}

/* ===== DELIVERY ===== */
.delivery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
}
.delivery-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.delivery-info .item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: var(--bg-card);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}
.delivery-info .item .icon {
    font-size: 1.4rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.delivery-info .item .text {
    font-size: 0.95rem;
}
.delivery-info .item .text strong {
    color: var(--text-primary);
}
.delivery-map {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.delivery-map .big-icon {
    font-size: 3.4rem;
    margin-bottom: 12px;
}
.delivery-map h4 {
    font-size: 1.2rem;
}
.delivery-map p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 280px;
}

/* ===== HOW TO ORDER ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: background var(--transition), transform var(--transition);
}
.step-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
}
.step-card .num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(245, 179, 66, 0.12);
    color: var(--accent);
    font-weight: 800;
    font-size: 1.2rem;
    margin-bottom: 12px;
}
.step-card h4 {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 4px;
}
.step-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== FAQ ===== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.faq-item .question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: background var(--transition);
    user-select: none;
}
.faq-item .question:hover {
    background: rgba(255, 255, 255, 0.02);
}
.faq-item .question .arrow {
    font-size: 1.2rem;
    transition: transform var(--transition);
    color: var(--text-muted);
    flex-shrink: 0;
    margin-left: 16px;
}
.faq-item.open .question .arrow {
    transform: rotate(180deg);
}
.faq-item .answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.3s ease;
    padding: 0 24px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}
.faq-item.open .answer {
    max-height: 200px;
    padding: 0 24px 20px;
}

/* ===== PRODUCT DETAIL ===== */
.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}
.product-detail-image {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.product-detail-image img {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: var(--radius);
}
.product-detail-info h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 8px;
}
.product-detail-info .price-big {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    margin: 16px 0;
}
.product-detail-info .price-big span {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-secondary);
}
.product-detail-info .description {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 20px;
}
.product-detail-info .specs {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    margin-bottom: 20px;
}
.product-detail-info .specs table {
    width: 100%;
    border-collapse: collapse;
}
.product-detail-info .specs td {
    padding: 6px 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}
.product-detail-info .specs td:last-child {
    text-align: right;
    color: var(--text-primary);
    font-weight: 500;
}
.product-detail-info .specs tr:last-child td {
    border-bottom: none;
}
.product-detail-info .actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== PRICES TABLE ===== */
.price-table-wrap {
    overflow-x: auto;
}
.price-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
}
.price-table th,
.price-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.price-table th {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.price-table tr:last-child td {
    border-bottom: none;
}
.price-table .price-sale {
    color: var(--accent);
    font-weight: 700;
}

/* ===== CERTIFICATES ===== */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
    text-align: center;
}
.cert-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 30px 20px;
    transition: border-color var(--transition);
}
.cert-item:hover {
    border-color: var(--accent);
}
.cert-item .icon {
    font-size: 3.5rem;
    margin-bottom: 12px;
}
.cert-item h4 {
    font-weight: 600;
    font-size: 1rem;
}
.cert-item p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 4px;
}

/* ===== ARTICLES ===== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px 20px;
    transition: background var(--transition), border-color var(--transition);
}
.article-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-secondary);
}
.article-card h4 {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 6px;
}
.article-card .date {
    color: var(--text-muted);
    font-size: 0.8rem;
}
.article-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 8px;
}

/* ===== CONTACTS ===== */
.contacts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.contacts-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.contacts-info .item {
    display: flex;
    gap: 14px;
    align-items: center;
    background: var(--bg-card);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}
.contacts-info .item .icon {
    font-size: 1.5rem;
}
.contacts-info .item .text {
    font-size: 1rem;
}
.contacts-info .item .text strong {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
}
.contacts-map {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}
.contacts-map .big-icon {
    font-size: 4rem;
    margin-bottom: 12px;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}
.footer-brand .logo {
    font-size: 1.2rem;
    margin-bottom: 8px;
}
.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 280px;
}
.footer-col h5 {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 12px;
}
.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.footer-col ul a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition);
}
.footer-col ul a:hover {
    color: var(--text-primary);
}
.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content .delivery-badge {
        justify-content: center;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-image .mock-cylinder {
        width: 220px;
        height: 300px;
    }
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .delivery-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .contacts-grid {
        grid-template-columns: 1fr;
    }
    .product-detail-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .product-detail-info .actions {
        justify-content: center;
    }
    .product-detail-info .specs td:last-child {
        text-align: left;
    }
}

@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: rgba(11, 14, 20, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 20px 24px 30px;
        gap: 4px;
        transform: translateY(-110%);
        transition: transform 0.35s ease;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
        max-height: 80vh;
        overflow-y: auto;
        align-items: stretch;
    }
    .nav-list.open {
        transform: translateY(0);
    }
    .nav-list a {
        padding: 12px 16px;
        font-size: 1rem;
        width: 100%;
        text-align: center;
        border-radius: var(--radius-sm);
    }
    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: calc(var(--header-height) + 24px);
        padding-bottom: 40px;
    }
    .hero-content h1 {
        font-size: 2.2rem;
    }
    .hero-content .sub {
        font-size: 1rem;
    }
    .hero-image .mock-cylinder {
        width: 180px;
        height: 250px;
    }
    .hero-image .mock-cylinder .label {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 1.7rem;
    }
    .advantages-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }
    .advantage-card {
        padding: 20px 14px;
    }
    .catalog-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }
    .product-card {
        padding: 16px 14px;
    }
    .product-card .product-img {
        height: 120px;
    }
    .product-card .name {
        font-size: 0.95rem;
    }
    .product-card .prices .price-item {
        font-size: 0.75rem;
        padding: 2px 10px;
    }
    .btn-sm {
        padding: 8px 14px;
        font-size: 0.8rem;
    }
    .accessories-grid {
        grid-template-columns: 1fr 1fr;
    }
    .accessory-card .accessory-img {
        height: 90px;
    }
    .steps-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }
    .step-card {
        padding: 20px 14px;
    }
    .step-card .num {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .price-table th,
    .price-table td {
        padding: 10px 12px;
        font-size: 0.85rem;
    }
    .contacts-grid {
        grid-template-columns: 1fr;
    }
    .product-detail-image .mock-cylinder {
        width: 140px;
        height: 190px;
    }
    .product-detail-info h1 {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 14px;
    }
    .catalog-grid {
        grid-template-columns: 1fr;
    }
    .advantages-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .advantage-card {
        padding: 16px 10px;
    }
    .advantage-card .icon {
        font-size: 1.6rem;
    }
    .advantage-card h4 {
        font-size: 0.9rem;
    }
    .advantage-card p {
        font-size: 0.8rem;
    }
    .accessories-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
    .hero-image .mock-cylinder {
        width: 150px;
        height: 210px;
    }
    .hero-image .mock-cylinder .label {
        font-size: 0.95rem;
    }
    .delivery-info .item {
        padding: 12px 14px;
    }
    .faq-item .question {
        font-size: 0.9rem;
        padding: 14px 16px;
    }
    .faq-item .answer {
        font-size: 0.85rem;
    }
    .cert-grid {
        grid-template-columns: 1fr 1fr;
    }
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== UTILITY ===== */
.text-center {
    text-align: center;
}
.mt-8 {
    margin-top: 8px;
}
.mt-16 {
    margin-top: 16px;
}
.mt-24 {
    margin-top: 24px;
}
.mb-8 {
    margin-bottom: 8px;
}
.gap-8 {
    gap: 8px;
}
.flex-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

/* scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}