/* ============================================
   BEIJING MEIPIN - MAIN STYLESHEET
   Corporate Website for Global HR Solutions
   ============================================ */

/* ---------- CSS VARIABLES ---------- */
:root {
    --primary-color: #0056b3;
    --primary-dark: #003d82;
    --secondary-color: #00a8e8;
    --accent-color: #ff6b35;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --text-muted: #999999;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --bg-dark: #1a1a1a;
    --gradient-primary: linear-gradient(135deg, #0056b3 0%, #00a8e8 100%);
    --gradient-accent: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-heading: 'Montserrat', 'Arial Black', sans-serif;
    --font-body: 'Open Sans', 'Arial', sans-serif;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
    list-style: none;
}

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

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

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

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- LAYOUT ---------- */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
    position: relative;
}

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

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    margin-bottom: 20px;
}

.section-header p {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-light);
}

/* ---------- GRID SYSTEM ---------- */
.grid {
    display: grid;
    gap: 30px;
}

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

/* ---------- HEADER & NAVIGATION ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

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

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-dark);
    position: relative;
    padding: 10px 0;
}

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

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
}

.mobile-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-dark);
    transition: all var(--transition-fast);
}

/* ---------- HERO SECTION ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

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

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

.hero h1 {
    color: var(--bg-white);
    margin-bottom: 30px;
    font-size: 4rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 35px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-white);
    box-shadow: 0 4px 15px rgba(0, 86, 179, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 86, 179, 0.5);
}

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

.btn-secondary:hover {
    background: var(--bg-light);
    transform: translateY(-3px);
}

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

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

/* ---------- CARDS ---------- */
.card {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    height: 100%;
}

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

.card-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    margin-bottom: 25px;
}

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

.card h3 {
    margin-bottom: 15px;
}

.card p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
}

.card-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.card-link:hover svg {
    transform: translateX(5px);
}

/* ---------- FEATURES ---------- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-icon {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    margin: 0 auto 25px;
    position: relative;
}

.feature-icon::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 2px dashed var(--secondary-color);
    border-radius: 50%;
    opacity: 0.5;
    animation: rotate 20s linear infinite;
}

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

.feature-icon svg {
    width: 45px;
    height: 45px;
    fill: var(--bg-white);
}

/* ---------- STATISTICS ---------- */
.stats-section {
    background: var(--gradient-primary);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat-item {
    text-align: center;
    color: var(--bg-white);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ---------- CTA SECTION ---------- */
.cta-section {
    background: var(--bg-dark);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.cta-content {
    text-align: center;
    color: var(--bg-white);
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    color: var(--bg-white);
    margin-bottom: 20px;
}

.cta-content p {
    max-width: 600px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

/* ---------- FOOTER ---------- */
.footer {
    background: var(--bg-dark);
    color: var(--bg-white);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
    margin: 20px 0 30px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

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

.footer-title {
    font-size: 1.25rem;
    margin-bottom: 25px;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: 30px;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

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

/* ---------- FORMS ---------- */
.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 15px 20px;
    font-size: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
}

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

/* ---------- PAGE BANNER ---------- */
.page-banner {
    background: var(--gradient-primary);
    padding: 180px 0 100px;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 100 100\"><circle cx=\"50\" cy=\"50\" r=\"40\" fill=\"none\" stroke=\"rgba(255,255,255,0.1)\" stroke-width=\"0.5\"/></svg>');
    background-size: 100px;
}

.page-banner-content {
    position: relative;
    z-index: 1;
    color: var(--bg-white);
    text-align: center;
}

.page-banner h1 {
    color: var(--bg-white);
    margin-bottom: 15px;
}

.page-banner p {
    opacity: 0.9;
    font-size: 1.2rem;
}

/* ---------- NEWS & BLOG ---------- */
.news-card {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.news-image {
    height: 200px;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-date {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--bg-white);
    padding: 8px 15px;
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.news-content {
    padding: 30px;
}

.news-category {
    display: inline-block;
    padding: 5px 15px;
    background: rgba(0, 86, 179, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.news-content h3 {
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.news-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

/* ---------- MOBILE APP SECTION ---------- */
.app-section {
    background: var(--bg-light);
}

.app-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.app-content h2 {
    margin-bottom: 20px;
}

.app-content p {
    color: var(--text-light);
    margin-bottom: 30px;
}

.app-features {
    margin-bottom: 30px;
}

.app-feature {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.app-feature svg {
    width: 24px;
    height: 24px;
    fill: var(--primary-color);
}

.app-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.app-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 25px;
    background: var(--bg-dark);
    color: var(--bg-white);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

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

.app-button svg {
    width: 30px;
    height: 30px;
}

.app-button-text {
    text-align: left;
}

.app-button-text span {
    display: block;
    font-size: 0.75rem;
}

.app-button-text strong {
    font-size: 1.1rem;
}

.app-image {
    display: flex;
    justify-content: center;
    position: relative;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: var(--bg-dark);
    border-radius: 40px;
    padding: 10px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-weight: 600;
}

/* ---------- ABOUT SECTION ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image-main {
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.about-badge-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}

.about-badge-text {
    font-size: 0.9rem;
    margin-top: 5px;
}

/* ---------- TEAM SECTION ---------- */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

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

.team-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: var(--gradient-primary);
    margin: 0 auto 20px;
    overflow: hidden;
    position: relative;
}

.team-info h4 {
    margin-bottom: 5px;
}

.team-info p {
    color: var(--primary-color);
    font-weight: 600;
    margin: 0;
}

/* ---------- 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(--gradient-primary);
    transform: translateX(-50%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 60px;
    display: flex;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: calc(50% - 40px);
    padding: 30px;
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 30px;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translateX(-50%);
    border: 4px solid var(--bg-white);
    box-shadow: var(--shadow-sm);
}

.timeline-year {
    display: inline-block;
    padding: 5px 15px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    border-radius: 50px;
    font-weight: 600;
    margin-bottom: 15px;
}

/* ---------- CONTACT INFO ---------- */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.contact-info-item {
    text-align: center;
    padding: 40px;
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-info-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    margin: 0 auto 20px;
}

.contact-info-icon svg {
    width: 35px;
    height: 35px;
    fill: var(--bg-white);
}

.contact-info-item h4 {
    margin-bottom: 10px;
}

.contact-info-item p {
    color: var(--text-light);
    margin: 0;
}

.contact-info-item a {
    color: var(--primary-color);
    font-weight: 600;
}

.contact-info-item a:hover {
    text-decoration: underline;
}

/* ---------- MAP SECTION ---------- */
.map-section {
    height: 400px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-xl);
    margin-top: 60px;
}

.map-placeholder {
    text-align: center;
    color: var(--text-light);
}

/* ---------- POLICY PAGES ---------- */
.policy-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px;
}

.policy-section {
    margin-bottom: 50px;
}

.policy-section h2 {
    font-size: 1.75rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.policy-section h3 {
    font-size: 1.35rem;
    margin: 30px 0 15px;
}

.policy-section p {
    color: var(--text-light);
    line-height: 1.8;
}

.policy-section ul {
    margin: 20px 0;
    padding-left: 30px;
}

.policy-section li {
    color: var(--text-light);
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.policy-section li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
}

.ad-platform {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 20px 0;
}

.ad-platform-item {
    padding: 20px;
    background: var(--bg-light);
    border-radius: var(--border-radius-md);
    border-left: 4px solid var(--primary-color);
}

.ad-platform-item h4 {
    margin-bottom: 8px;
    color: var(--primary-color);
}

.ad-platform-item p {
    margin: 0;
    font-size: 0.95rem;
}

/* ---------- LOADING SCREEN ---------- */
.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader-wrapper.hidden {
    opacity: 0;
    visibility: hidden;
}

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

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

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

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

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1200px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.25rem; }
    
    .features-grid,
    .stats-grid,
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 992px) {
    .section {
        padding: 80px 0;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .app-grid,
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .app-image {
        order: -1;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
        padding-left: 60px;
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .timeline-dot {
        left: 20px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        transition: left var(--transition-normal);
        z-index: 1001;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.5rem;
    }
    
    .mobile-toggle {
        display: flex;
        z-index: 1002;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        min-height: auto;
        padding: 150px 0 80px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-info-grid {
        grid-template-columns: 1fr;
    }
    
    .ad-platform {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .section {
        padding: 60px 0;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .card {
        padding: 25px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .app-buttons {
        flex-direction: column;
    }
    
    .app-button {
        width: 100%;
        justify-content: center;
    }
}