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

:root {
    /* Цветовая палитра - светлая тема */
    --primary-color: #ff6b35;
    --primary-hover: #ff8555;
    --secondary-color: #ff9d6b;
    --accent-color: #ff7f5c;
    --bg-color: #fafbfc;
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-color: #1a1a1a;
    --text-secondary: #4a5568;
    --muted-color: #718096;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.04);
    
    /* Тени */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.1);
    --shadow: var(--shadow-lg);
    
    /* Градиенты */
    --gradient: linear-gradient(135deg, #ff8c5a 0%, #ff6b35 50%, #ff5a2a 100%);
    --gradient-hover: linear-gradient(135deg, #ff9d6b 0%, #ff7f5c 50%, #ff6b4a 100%);
    --surface-gradient: linear-gradient(145deg, rgba(255, 140, 90, 0.08), rgba(255, 107, 53, 0.05));
    
    /* Эффекты */
    --glass-blur: blur(12px);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.5rem);
    --font-size-xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
    --font-size-2xl: clamp(2rem, 1.7rem + 1.5vw, 3rem);
    --font-size-3xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
}

/* Темная тема */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #ff8c5a;
        --primary-hover: #ffa578;
        --secondary-color: #ffb389;
        --accent-color: #ff9d6b;
        --bg-color: #0f1419;
        --card-bg: rgba(26, 32, 44, 0.95);
        --text-color: #f7fafc;
        --text-secondary: #cbd5e0;
        --muted-color: #a0aec0;
        --border-color: rgba(255, 255, 255, 0.1);
        --border-light: rgba(255, 255, 255, 0.05);
        
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
        --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.6);
        
        --surface-gradient: linear-gradient(145deg, rgba(255, 140, 90, 0.15), rgba(255, 107, 53, 0.1));
    }
}

body {
    font-family: 'Inter', 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 15% 20%, rgba(255, 140, 90, 0.12), transparent 30%),
        radial-gradient(circle at 85% 15%, rgba(255, 107, 53, 0.08), transparent 32%),
        radial-gradient(circle at 55% 80%, rgba(255, 90, 42, 0.1), transparent 35%);
    background-attachment: fixed;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}

a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 4px;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }
}

header {
    background: var(--gradient);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    animation: fadeInDown 0.6s ease-out;
}

header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
    position: relative;
    z-index: 1;
    letter-spacing: -0.02em;
}

header p {
    font-size: var(--font-size-lg);
    opacity: 0.95;
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: var(--line-height-relaxed);
    position: relative;
    z-index: 1;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cta-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) auto 0;
    position: relative;
    z-index: 1;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    min-height: 48px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn.primary {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
    background: #fff;
    color: var(--primary-color);
    border-color: rgba(255, 255, 255, 0.7);
}

.btn:hover::before {
    left: 100%;
}

.btn.primary:hover {
    background: #fff;
    color: var(--primary-color);
    border-color: rgba(255, 255, 255, 0.8);
}

.btn:active {
    transform: translateY(-1px) scale(0.98);
}

.highlight-block {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    margin: var(--spacing-xl) 0;
    border: 1px solid var(--border-light);
    background-image: var(--surface-gradient);
    transition: var(--transition);
    will-change: transform, box-shadow;
}

.highlight-block:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.highlight-block h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    line-height: var(--line-height-tight);
}

.benefits-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.benefit-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    will-change: transform, box-shadow;
}

.benefit-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
    border-color: var(--border-color);
}

.benefit-item .icon {
    font-size: 1.3rem;
    flex-shrink: 0;
}

.muted-note {
    margin: var(--spacing-xs) 0 0;
    font-size: var(--font-size-sm);
    color: var(--muted-color);
    line-height: var(--line-height-normal);
}

.path-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.path-step {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    position: relative;
    background-image: var(--surface-gradient);
    transition: var(--transition);
    will-change: transform, box-shadow;
}

.path-step:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.path-step strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.path-step::before {
    content: counter(step-counter);
    counter-increment: step-counter;
    position: absolute;
    top: -12px;
    left: 16px;
    background: var(--secondary-color);
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.path-container {
    counter-reset: step-counter;
}

.muted-step {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--muted-color);
    line-height: var(--line-height-normal);
}

.spaced-list {
    margin-left: 20px;
    line-height: 2;
}

.quick-start {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    background-image: var(--surface-gradient);
    transition: var(--transition);
    will-change: transform, box-shadow;
}

.quick-start:hover {
    box-shadow: var(--shadow-lg);
}

.quick-start h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: var(--line-height-tight);
}

.quick-start ol {
    margin-left: 20px;
    line-height: 2;
}

.quick-start li {
    margin-bottom: 10px;
}

.tabs-toggle {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--card-bg);
    color: var(--text-color);
    cursor: pointer;
    position: sticky;
    top: 0;
    z-index: 110;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.tabs-toggle:hover {
    box-shadow: var(--shadow-md);
}

.tabs-toggle:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.tabs-toggle__label {
    font-weight: 600;
}

.burger-icon {
    position: relative;
    width: 20px;
    height: 16px;
    display: inline-block;
}

.burger-icon span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--text-color);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.burger-icon span:nth-child(1) {
    top: 0;
}

.burger-icon span:nth-child(2) {
    top: 7px;
}

.burger-icon span:nth-child(3) {
    bottom: 0;
}

.tabs-toggle[aria-expanded="true"] .burger-icon span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.tabs-toggle[aria-expanded="true"] .burger-icon span:nth-child(2) {
    opacity: 0;
}

.tabs-toggle[aria-expanded="true"] .burger-icon span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: 0 0 var(--spacing-lg) 0;
    border-bottom: 2px solid var(--border-light);
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    padding: var(--spacing-sm) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

@supports (backdrop-filter: blur(12px)) {
    .tabs {
        background: rgba(255, 255, 255, 0.8);
    }
}

@media (prefers-color-scheme: dark) {
    @supports (backdrop-filter: blur(12px)) {
        .tabs {
            background: rgba(26, 32, 44, 0.8);
        }
    }
}

.tab-button {
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    transition: var(--transition);
    font-weight: 500;
    min-height: 48px;
    touch-action: manipulation;
    white-space: nowrap;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    position: relative;
    will-change: color, border-color;
}

.tab-button::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.tab-button:hover {
    color: var(--primary-color);
    background: rgba(255, 107, 53, 0.05);
}

.tab-button:hover::after {
    transform: scaleX(0.5);
}

.tab-button.active {
    color: var(--primary-color);
    font-weight: 600;
    background: transparent;
}

.tab-button.active::after {
    transform: scaleX(1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    background-image: var(--surface-gradient);
    transition: var(--transition);
    will-change: transform, box-shadow;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.section:hover {
    box-shadow: var(--shadow-lg);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    line-height: var(--line-height-tight);
}

.section h4 {
    color: var(--primary-color);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.section p {
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-relaxed);
    color: var(--text-secondary);
}

.section ul, .section ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.section li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.screenshot-placeholder {
    width: 100%;
    max-width: 600px;
    min-height: 300px;
    background: var(--surface-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--spacing-lg) 0;
    border: 2px dashed var(--border-color);
    color: var(--muted-color);
    font-size: var(--font-size-base);
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.screenshot-placeholder:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.screenshot-placeholder:has(img) {
    border: none;
    padding: 0;
    background: transparent;
}

.screenshot-placeholder:has(img)::after {
    content: "🔍";
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    padding: 4px 8px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    opacity: 0.75;
    pointer-events: none;
}

.screenshot-placeholder img {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-md);
    display: block;
    cursor: zoom-in;
}

.screenshot-placeholder.loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

.screenshot-small {
    margin-top: 10px;
}

/* Уточнённый размер для компактных скринов */
.screenshot-placeholder.screenshot-small {
    min-height: 160px;
    max-height: 240px;
    height: auto;
    max-width: 100%;
}

.screenshot-placeholder.screenshot-small img {
    max-height: 220px;
    width: auto;
    max-width: 100%;
    margin: 0 auto;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.notification-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.notification-badge.orders { background: linear-gradient(135deg, #ff9b6c, #f35b3f); color: white; }
.notification-badge.cancels { background: linear-gradient(135deg, #ff6a4d, #ff4d6d); color: white; }
.notification-badge.lm { background: linear-gradient(135deg, #ffb347, #ff6a4d); color: white; }
.notification-badge.sales { background: linear-gradient(135deg, #45c27c, #2d9f67); color: white; }
.notification-badge.returns { background: linear-gradient(135deg, #b680ff, #9b59b6); color: white; }
.notification-badge.daily { background: linear-gradient(135deg, #4dd0e1, #16a085); color: white; }

.icon-placeholder {
    width: 48px;
    height: 48px;
    background: var(--secondary-color);
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-right: 10px;
}

.notification-type {
    background: var(--card-bg);
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-md);
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.notification-type:hover {
    box-shadow: var(--shadow-md);
}

.notification-type h5 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-light);
    background-image: var(--surface-gradient);
    will-change: transform, box-shadow;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-color);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

.risk-block {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: grid;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.risk-block strong {
    color: var(--primary-color);
    font-size: var(--font-size-base);
    font-weight: 600;
}

.cta-inline {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    background: rgba(255, 107, 53, 0.08);
    transition: var(--transition);
    will-change: transform, background-color;
}

.cta-inline:hover {
    background: rgba(255, 107, 53, 0.15);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.7);
    color: var(--primary-color);
    border-radius: 12px;
    font-size: 0.85rem;
    margin-left: 10px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 6px 16px rgba(243, 91, 63, 0.16);
}

.badge.new {
    background: var(--gradient);
    color: #fff;
    border-color: transparent;
}

/* Mobile-first адаптивность */
@media (max-width: 1024px) {
    .container {
        max-width: 100%;
        padding: var(--spacing-md);
    }
    
    .feature-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    header {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    header h1 {
        font-size: var(--font-size-2xl);
    }

    header p {
        font-size: var(--font-size-base);
    }
    
    .cta-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }

    .tabs-toggle {
        display: flex;
    }

    .tabs {
        display: none;
        flex-direction: column;
        gap: var(--spacing-xs);
        padding: var(--spacing-sm);
        margin-top: var(--spacing-xs);
        margin-bottom: var(--spacing-sm);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        position: static;
        box-shadow: none;
    }

    .tabs.is-open {
        display: flex;
        box-shadow: var(--shadow-sm);
    }
    
    .tabs::-webkit-scrollbar {
        height: 4px;
    }
    
    .tabs::-webkit-scrollbar-thumb {
        background: var(--primary-color);
        border-radius: var(--radius-full);
    }

    .tab-button {
        width: 100%;
        text-align: left;
        border-bottom: 2px solid var(--border-light);
        border-left: 4px solid transparent;
        border-radius: var(--radius-md);
        padding: var(--spacing-md);
    }
    
    .tab-button::after {
        display: none;
    }

    .tab-button.active {
        border-left-color: var(--primary-color);
        border-bottom-color: var(--border-light);
        background: rgba(255, 107, 53, 0.05);
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .section {
        padding: var(--spacing-lg);
    }

    .highlight-block {
        padding: var(--spacing-lg);
    }
    
    .quick-start {
        padding: var(--spacing-lg);
    }

    .benefits-list {
        grid-template-columns: 1fr;
    }

    .path-grid {
        grid-template-columns: 1fr;
    }
    
    .accordion-header {
        padding: var(--spacing-md);
        min-height: 52px;
    }
}

@media (max-width: 480px) {
    header {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    header h1 {
        font-size: var(--font-size-xl);
    }
    
    header p {
        font-size: var(--font-size-sm);
    }

    .section h3 {
        font-size: var(--font-size-lg);
    }
    
    .section {
        padding: var(--spacing-md);
    }
    
    .highlight-block {
        padding: var(--spacing-md);
    }
    
    .quick-start {
        padding: var(--spacing-md);
    }

    .screenshot-placeholder {
        height: 200px;
    }
    
    .tab-button {
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 360px) {
    header h1 {
        font-size: var(--font-size-lg);
    }
    
    .btn {
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

.accordion {
    margin: 20px 0;
}

.accordion-item {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--border-light);
    background-image: var(--surface-gradient);
    transition: var(--transition);
    will-change: transform, box-shadow;
}

.accordion-item:hover {
    box-shadow: var(--shadow-md);
}

.accordion-header {
    padding: var(--spacing-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    transition: var(--transition);
    min-height: 56px;
    touch-action: manipulation;
    position: relative;
}

.accordion-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.3s ease;
}

.accordion-header:hover {
    background: rgba(255, 107, 53, 0.05);
}

.accordion-item.active .accordion-header::before {
    transform: scaleY(1);
}

.btn:focus-visible,
.tab-button:focus-visible,
.accordion-header:focus-visible {
    outline: 3px solid rgba(255, 143, 86, 0.6);
    outline-offset: 2px;
}

.accordion-header h4 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.accordion-icon {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1.2rem;
    color: var(--primary-color);
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 107, 53, 0.1);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
    background: rgba(255, 107, 53, 0.2);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    opacity: 0;
}

.accordion-item.active .accordion-content {
    max-height: 5000px;
    opacity: 1;
}

.accordion-body {
    padding: 0 20px 20px 20px;
}

.footer {
    background: var(--gradient);
    color: white;
    text-align: center;
    padding: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.footer p {
    margin: 0;
    font-size: var(--font-size-base);
    opacity: 0.95;
}

/* Lightbox для увеличения изображений */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    backdrop-filter: blur(4px);
}

.lightbox-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-overlay img {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    background: #fff;
}

/* Оптимизация производительности */
* {
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
}

/* Улучшенная доступность - поддержка prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Улучшение рендеринга через CSS containment */
.section,
.highlight-block,
.feature-card,
.accordion-item {
    contain: layout style paint;
}