/* ===================================
   DINGSHENG HUATANG - MAIN STYLESHEET
   A comprehensive, animated corporate website
   =================================== */

/* === CSS VARIABLES === */
:root {
    /* Primary Colors */
    --primary: #003478;
    --primary-light: #0047AB;
    --primary-dark: #002355;
    
    /* Secondary Colors */
    --secondary: #c8102e;
    --secondary-light: #E63950;
    --secondary-dark: #9B0D24;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #868e96;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --black: #000000;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-dark: #0a1628;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--gray-800);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-light);
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* === LAYOUT UTILITIES === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

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

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.text-center {
    text-align: center;
}

/* === HEADER === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-lg);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--primary);
}

.logo svg {
    width: 40px;
    height: 40px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    position: relative;
    font-weight: var(--font-medium);
    color: var(--gray-700);
    padding: var(--spacing-sm) 0;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-800);
    transition: all var(--transition-base);
}

/* === HERO SECTION === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    color: var(--white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: var(--font-extrabold);
    line-height: var(--leading-tight);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-title span {
    color: var(--secondary);
}

.hero-description {
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    opacity: 0.9;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

.hero-visual {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

.hero-visual svg {
    width: 100%;
    max-width: 400px;
    animation: rotate 30s linear infinite;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn-primary {
    background: var(--secondary);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(200, 16, 46, 0.4);
}

.btn-primary:hover {
    background: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(200, 16, 46, 0.5);
}

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

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-800);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--text-lg);
}

/* === SECTIONS === */
.section {
    padding: var(--spacing-3xl) 0;
}

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

.section-dark {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 52, 120, 0.1);
    color: var(--primary);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--gray-600);
    line-height: var(--leading-relaxed);
}

/* === PAGE HEADER === */
.page-header {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    text-align: center;
}

.page-header h1 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--spacing-md);
}

.page-header p {
    font-size: var(--text-lg);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: var(--text-sm);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
    color: var(--white);
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.5);
}

/* === STATISTICS === */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-xl);
}

.stat-number {
    font-size: var(--text-5xl);
    font-weight: var(--font-extrabold);
    color: var(--primary);
    line-height: var(--leading-none);
    margin-bottom: var(--spacing-sm);
}

.section-dark .stat-number {
    color: var(--secondary);
}

.stat-label {
    font-size: var(--text-lg);
    color: var(--gray-600);
    font-weight: var(--font-medium);
}

.section-dark .stat-label {
    color: rgba(255, 255, 255, 0.8);
}

/* === SERVICES GRID === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-200);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.service-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--white);
}

.service-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.service-description {
    color: var(--gray-600);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-lg);
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-700);
    font-size: var(--text-sm);
}

.service-features svg {
    width: 18px;
    height: 18px;
    stroke: var(--secondary);
    flex-shrink: 0;
}

/* === CARDS === */
.card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.card-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--white);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.card-text {
    color: var(--gray-600);
    line-height: var(--leading-relaxed);
}

/* === APP SECTION === */
.app-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.app-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.app-info h2 {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--spacing-lg);
}

.app-info p {
    font-size: var(--text-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.app-features {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.app-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.app-feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.app-feature-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--secondary);
}

.app-feature h4 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    margin-bottom: var(--spacing-xs);
}

.app-download-buttons {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.store-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--white);
    color: var(--gray-900);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.store-badge:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.store-badge svg {
    width: 32px;
    height: 32px;
}

.store-badge-text {
    display: flex;
    flex-direction: column;
}

.store-badge-text span {
    font-size: var(--text-xs);
}

.store-badge-text strong {
    font-size: var(--text-lg);
}

.app-preview {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: var(--gray-900);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 50px 100px rgba(0, 0, 0, 0.4);
    animation: float 4s ease-in-out infinite;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.phone-screen svg {
    width: 60%;
    margin-bottom: var(--spacing-lg);
    opacity: 0.3;
}

/* === VALUES GRID === */
.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.value-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.value-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-xl);
    margin: 0 auto var(--spacing-lg);
}

.value-icon svg {
    width: 40px;
    height: 40px;
    stroke: var(--white);
}

.value-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.value-description {
    color: var(--gray-600);
    line-height: var(--leading-relaxed);
}

/* === TIMELINE === */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

.timeline-item {
    position: relative;
    padding: var(--spacing-xl);
    width: 50%;
}

.timeline-item:nth-child(odd) {
    margin-left: auto;
    padding-left: var(--spacing-3xl);
}

.timeline-item:nth-child(even) {
    padding-right: var(--spacing-3xl);
    text-align: right;
}

.timeline-dot {
    position: absolute;
    top: var(--spacing-xl);
    width: 20px;
    height: 20px;
    background: var(--secondary);
    border: 4px solid var(--white);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
}

.timeline-item:nth-child(odd) .timeline-dot {
    left: calc(var(--spacing-xl) - 10px);
}

.timeline-item:nth-child(even) .timeline-dot {
    right: calc(var(--spacing-xl) - 10px);
}

.timeline-year {
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
}

.timeline-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.timeline-text {
    color: var(--gray-600);
    line-height: var(--leading-relaxed);
}

/* === NEWS GRID === */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.news-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    position: relative;
}

.news-category {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--secondary);
    color: var(--white);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
}

.news-content {
    padding: var(--spacing-xl);
}

.news-date {
    font-size: var(--text-sm);
    color: var(--gray-500);
    margin-bottom: var(--spacing-sm);
}

.news-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.news-excerpt {
    color: var(--gray-600);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-lg);
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary);
    font-weight: var(--font-semibold);
}

.news-link svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-base);
}

.news-link:hover svg {
    transform: translateX(4px);
}

/* === CONTACT SECTION === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info h3 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.contact-info > p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--white);
}

.contact-item-content h4 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.contact-item-content p {
    color: var(--gray-600);
    line-height: var(--leading-relaxed);
}

/* === FORMS === */
.contact-form {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-xl);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 52, 120, 0.1);
}

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

/* === FOOTER === */
.footer {
    background: var(--bg-dark);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.footer-brand p {
    color: var(--gray-400);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-lg);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--white);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

.footer-social svg {
    width: 20px;
    height: 20px;
}

.footer-column h4 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--gray-400);
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-links p {
    color: var(--gray-400);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-bottom p {
    color: var(--gray-500);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-legal a {
    color: var(--gray-500);
    font-size: var(--text-sm);
}

.footer-legal a:hover {
    color: var(--white);
}

/* === COOKIE BANNER === */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    padding: var(--spacing-lg) var(--spacing-xl);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    z-index: var(--z-modal);
    display: none;
}

.cookie-banner.show {
    display: block;
    animation: slideUp 0.5s ease;
}

.cookie-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.cookie-text p {
    color: var(--gray-700);
}

.cookie-text a {
    color: var(--primary);
    font-weight: var(--font-medium);
}

.cookie-buttons {
    display: flex;
    gap: var(--spacing-md);
}

/* === SCROLL TOP BUTTON === */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-sticky);
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

.scroll-top svg {
    width: 24px;
    height: 24px;
}

/* === LEGAL PAGES === */
.toc {
    position: sticky;
    top: 100px;
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.toc h3 {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.toc-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toc-list a {
    font-size: var(--text-sm);
    color: var(--gray-600);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.toc-list a:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.legal-content {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.legal-section {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--gray-200);
}

.legal-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.legal-section h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.legal-section h3 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--gray-800);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.legal-section p {
    color: var(--gray-700);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-md);
}

.legal-section ul {
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.legal-section li {
    color: var(--gray-700);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

.legal-section li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* === AD PLATFORMS GRID === */
.ad-platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.ad-platform-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.ad-platform-item svg {
    width: 24px;
    height: 24px;
    stroke: var(--primary);
    flex-shrink: 0;
}

.ad-platform-item span {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--gray-700);
}

/* === SCROLL ANIMATIONS === */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-animate.stagger-1 { transition-delay: 0.1s; }
.scroll-animate.stagger-2 { transition-delay: 0.2s; }
.scroll-animate.stagger-3 { transition-delay: 0.3s; }
.scroll-animate.stagger-4 { transition-delay: 0.4s; }
.scroll-animate.stagger-5 { transition-delay: 0.5s; }
.scroll-animate.stagger-6 { transition-delay: 0.6s; }

/* === KEYFRAMES === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .app-content {
        grid-template-columns: 1fr;
    }
    
    .app-preview {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: var(--text-3xl);
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .services-grid,
    .values-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .ad-platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid {
        grid-template-columns: 1fr !important;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 50px !important;
        padding-right: 0 !important;
        text-align: left !important;
    }
    
    .timeline-item .timeline-dot {
        left: 10px !important;
        right: auto !important;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-buttons {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding-top: 60px;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .ad-platforms-grid {
        grid-template-columns: 1fr;
    }
}

/* === PRINT STYLES === */
@media print {
    .header,
    .footer,
    .cookie-banner,
    .scroll-top,
    .mobile-menu-toggle {
        display: none !important;
    }
    
    .page-header {
        padding-top: var(--spacing-xl);
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .legal-section {
        page-break-inside: avoid;
    }
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* === DARK MODE SUPPORT (FUTURE) === */
@media (prefers-color-scheme: dark) {
    /* Can be extended for dark mode support */
}