/* =====================================================
   MAIRUIK - Main Stylesheet
   Beijing Mairuikang Medical Equipment Co., Ltd.
   Professional Corporate Website for Global Markets
   ===================================================== */

/* =====================================================
   CSS VARIABLES & DESIGN SYSTEM
   ===================================================== */
:root {
    /* Primary Colors */
    --color-primary: #0066CC;
    --color-primary-dark: #004C99;
    --color-primary-light: #3399FF;
    
    /* Secondary Colors */
    --color-secondary: #00A3E0;
    --color-accent: #FF6B35;
    --color-accent-light: #FF8F66;
    
    /* Neutral Colors */
    --color-dark: #1A1A2E;
    --color-gray-900: #2D2D44;
    --color-gray-800: #3D3D5C;
    --color-gray-700: #5C5C7A;
    --color-gray-600: #7A7A99;
    --color-gray-500: #9999B3;
    --color-gray-400: #B3B3CC;
    --color-gray-300: #CCCCDD;
    --color-gray-200: #E6E6F0;
    --color-gray-100: #F3F3F8;
    --color-white: #FFFFFF;
    
    /* Semantic Colors */
    --color-success: #28A745;
    --color-warning: #FFC107;
    --color-danger: #DC3545;
    --color-info: #17A2B8;
    
    /* Typography */
    --font-primary: 'Audi Type', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Montserrat', 'Segoe UI', sans-serif;
    --font-body: 'Open Sans', 'Segoe UI', sans-serif;
    
    /* Font Sizes */
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: 1.875rem;
    --fs-4xl: 2.25rem;
    --fs-5xl: 3rem;
    --fs-6xl: 3.75rem;
    --fs-7xl: 4.5rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    
    /* Layout */
    --container-max: 1400px;
    --container-padding: 2rem;
    
    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --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 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 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);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
    color: var(--color-dark);
}

h1 { font-size: var(--fs-7xl); }
h2 { font-size: var(--fs-5xl); }
h3 { font-size: var(--fs-4xl); }
h4 { font-size: var(--fs-3xl); }
h5 { font-size: var(--fs-2xl); }
h6 { font-size: var(--fs-xl); }

p {
    margin-bottom: var(--space-4);
    color: var(--color-gray-700);
}

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

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

ul, ol {
    list-style: none;
}

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

/* =====================================================
   LAYOUT COMPONENTS
   ===================================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--space-24) 0;
    position: relative;
}

.section-dark {
    background-color: var(--color-dark);
    color: var(--color-white);
}

.section-light {
    background-color: var(--color-gray-100);
}

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

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.flex-column {
    display: flex;
    flex-direction: column;
}

/* =====================================================
   HEADER & NAVIGATION
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo svg {
    height: 50px;
    width: auto;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-dark);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-heading);
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--color-dark);
    transition: all var(--transition-base);
    border-radius: var(--radius-md);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-gray-100);
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 250px;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    padding: var(--space-4);
    margin-top: var(--space-2);
}

.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.dropdown-item:hover {
    background-color: var(--color-gray-100);
    color: var(--color-primary);
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-2);
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--color-dark);
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-gray-900) 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.9) 0%, rgba(0, 163, 224, 0.7) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    color: var(--color-white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-6);
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: var(--fs-7xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    color: var(--color-white);
}

.hero-subtitle {
    font-size: var(--fs-2xl);
    margin-bottom: var(--space-8);
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--space-12);
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: var(--fs-5xl);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--fs-sm);
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-heading);
    font-size: var(--fs-base);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--color-white);
}

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

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

.btn-accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--color-white);
}

.btn-lg {
    padding: var(--space-6) var(--space-12);
    font-size: var(--fs-lg);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--fs-sm);
}

/* =====================================================
   CARDS
   ===================================================== */
.card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

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

.card-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.card-icon svg {
    width: 40px;
    height: 40px;
    fill: var(--color-white);
}

.card-title {
    font-size: var(--fs-2xl);
    margin-bottom: var(--space-4);
}

.card-text {
    color: var(--color-gray-600);
    margin-bottom: var(--space-6);
}

/* =====================================================
   FEATURE SECTIONS
   ===================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    text-align: center;
    padding: var(--space-12);
}

.feature-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-8);
    position: relative;
}

.feature-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    opacity: 0.1;
}

.feature-icon svg {
    position: relative;
    z-index: 1;
    width: 60px;
    height: 60px;
    fill: var(--color-primary);
}

/* =====================================================
   ABOUT SECTION
   ===================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-xl);
    z-index: -1;
}

.about-content {
    padding: var(--space-8);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-16);
}

.section-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: var(--fs-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: var(--fs-5xl);
    margin-bottom: var(--space-6);
}

.section-description {
    font-size: var(--fs-lg);
    color: var(--color-gray-600);
    line-height: 1.8;
}

/* =====================================================
   SERVICES SECTION
   ===================================================== */
.services-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    flex-wrap: wrap;
}

.service-tab {
    padding: var(--space-3) var(--space-6);
    background-color: var(--color-white);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.service-tab.active,
.service-tab:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.service-panel {
    display: none;
}

.service-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

/* =====================================================
   APP SECTION
   ===================================================== */
.app-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.app-preview {
    position: relative;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-gray-900) 100%);
    border-radius: 40px;
    padding: 10px;
    box-shadow: var(--shadow-xl);
    margin: 0 auto;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-features-list {
    list-style: none;
}

.app-feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-6);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.app-feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.feature-check {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, var(--color-success) 0%, #20c997 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-check svg {
    width: 16px;
    height: 16px;
    fill: var(--color-white);
}

/* =====================================================
   CTA SECTION
   ===================================================== */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    text-align: center;
    padding: var(--space-24) 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: var(--fs-5xl);
    margin-bottom: var(--space-6);
    color: var(--color-white);
}

.cta-text {
    font-size: var(--fs-xl);
    margin-bottom: var(--space-8);
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.store-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    margin-top: var(--space-8);
}

.store-button {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    background-color: var(--color-dark);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.store-button:hover {
    background-color: var(--color-gray-900);
    transform: translateY(-2px);
    color: var(--color-white);
}

.store-button svg {
    width: 30px;
    height: 30px;
    fill: var(--color-white);
}

/* =====================================================
   NEWS SECTION
   ===================================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

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

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.news-image {
    height: 250px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.news-image::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;
}

.news-card:hover .news-image::before {
    left: 100%;
}

.news-content {
    padding: var(--space-6);
}

.news-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--fs-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--space-3);
}

.news-category {
    color: var(--color-primary);
    font-weight: 600;
}

.news-title {
    font-size: var(--fs-xl);
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.news-excerpt {
    color: var(--color-gray-600);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

/* =====================================================
   TEAM SECTION
   ===================================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

.team-card {
    text-align: center;
    padding: var(--space-8);
}

.team-avatar {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--space-6);
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.team-avatar::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    opacity: 0.3;
    animation: pulse 2s ease-in-out infinite;
}

.team-avatar svg {
    width: 80px;
    height: 80px;
    fill: var(--color-white);
}

.team-name {
    font-size: var(--fs-xl);
    margin-bottom: var(--space-2);
}

.team-role {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.team-bio {
    color: var(--color-gray-600);
    font-size: var(--fs-sm);
}

/* =====================================================
   CONTACT SECTION
   ===================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
}

.contact-info {
    padding: var(--space-8);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 30px;
    height: 30px;
    fill: var(--color-white);
}

.contact-details h4 {
    margin-bottom: var(--space-2);
}

.contact-details p {
    color: var(--color-gray-600);
    margin-bottom: 0;
}

.contact-form {
    background-color: var(--color-white);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-dark);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: var(--fs-base);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.footer-logo svg {
    height: 50px;
    width: auto;
}

.footer-description {
    color: var(--color-gray-400);
    margin-bottom: var(--space-6);
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    width: 45px;
    height: 45px;
    background-color: var(--color-gray-800);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.social-link:hover {
    background-color: var(--color-primary);
    transform: translateY(-3px);
}

.social-link svg {
    width: 20px;
    height: 20px;
    fill: var(--color-white);
}

.footer-column h4 {
    color: var(--color-white);
    font-size: var(--fs-lg);
    margin-bottom: var(--space-6);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-3);
}

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

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

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding-top: var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

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

.footer-legal {
    display: flex;
    gap: var(--space-6);
}

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

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

/* =====================================================
   PAGE HEADERS
   ===================================================== */
.page-header {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-gray-900) 100%);
    color: var(--color-white);
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.8) 0%, rgba(0, 163, 224, 0.6) 100%);
}

.page-header-content {
    position: relative;
    z-index: 1;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    font-size: var(--fs-sm);
}

.breadcrumb a {
    color: var(--color-gray-300);
}

.breadcrumb span {
    color: var(--color-gray-500);
}

.page-title {
    font-size: var(--fs-6xl);
    margin-bottom: var(--space-4);
    color: var(--color-white);
}

.page-subtitle {
    font-size: var(--fs-xl);
    opacity: 0.9;
}

/* =====================================================
   TIMELINE
   ===================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-8) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-12);
    width: 50%;
    padding-right: var(--space-12);
}

.timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: var(--space-12);
}

.timeline-content {
    background-color: var(--color-white);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.timeline-year {
    font-size: var(--fs-3xl);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.timeline-dot {
    position: absolute;
    top: var(--space-8);
    right: -12px;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    border: 4px solid var(--color-white);
    box-shadow: var(--shadow-md);
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -12px;
    right: auto;
}

/* =====================================================
   VALUES SECTION
   ===================================================== */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
}

.value-card {
    text-align: center;
    padding: var(--space-10);
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.value-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--space-6);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.value-icon svg {
    width: 50px;
    height: 50px;
    fill: var(--color-white);
}

.value-title {
    font-size: var(--fs-2xl);
    margin-bottom: var(--space-3);
}

.value-description {
    color: var(--color-gray-600);
}

/* =====================================================
   PARTNERS SECTION
   ===================================================== */
.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-12);
    flex-wrap: wrap;
}

.partner-logo {
    width: 150px;
    height: 80px;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    padding: var(--space-4);
}

.partner-logo:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.partner-logo svg {
    width: 100%;
    height: 100%;
    fill: var(--color-gray-600);
}

/* =====================================================
   UTILITIES
   ===================================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }

.hidden { display: none; }
.visible { display: block; }

/* =====================================================
   SCROLL TO TOP
   ===================================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

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

.scroll-top:hover {
    transform: translateY(-5px);
}

.scroll-top svg {
    width: 24px;
    height: 24px;
    fill: var(--color-white);
}

/* =====================================================
   LOADING ANIMATION
   ===================================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* =====================================================
   RESPONSIVE UTILITIES
   ===================================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--fs-6xl);
    }
    
    .about-grid,
    .contact-grid,
    .app-showcase {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--space-8);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: var(--fs-4xl);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 60px;
        padding-right: 0;
    }
    
    .timeline-item:nth-child(even) {
        margin-left: 0;
        padding-left: 60px;
    }
    
    .timeline-dot {
        left: 8px !important;
        right: auto !important;
    }
}