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

:root {
    --primary-blue: #1a73e8;
    --primary-dark: #0d47a1;
    --primary-light: #e8f0fe;
    --secondary-blue: #4285f4;
    --accent-blue: #34a853;
    --text-dark: #202124;
    --text-light: #5f6368;
    --white: #ffffff;
    --gray-bg: #f8f9fa;
    --gray-border: #dadce0;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

.section {
    padding: 80px 0;
}

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

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

.highlight {
    color: var(--primary-blue);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    color: var(--text-light);
}

/* ===== HERO SECTION ===== */
.hero {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f0fe 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(26, 115, 232, 0.1) 0%, rgba(26, 115, 232, 0) 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto 2.5rem;
    color: var(--text-light);
}

.hero-visual {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.floating-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    width: 200px;
    text-align: center;
    transition: var(--transition);
    animation: float 3s ease-in-out infinite;
}

.floating-card:nth-child(2) {
    animation-delay: 0.5s;
}

.floating-card:nth-child(3) {
    animation-delay: 1s;
}

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

.floating-card i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ===== BUTTONS ===== */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background-color: var(--primary-blue);
    color: white;
    padding: 18px 36px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

.cta-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(26, 115, 232, 0.4);
}

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

.cta-button.secondary:hover {
    background-color: var(--primary-blue);
    color: white;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(26, 115, 232, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(26, 115, 232, 0); }
    100% { box-shadow: 0 0 0 0 rgba(26, 115, 232, 0); }
}

/* ===== FEATURES & BENEFITS ===== */
.features-grid, .benefits-grid, .audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature, .benefit-card, .audience-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.feature i, .benefit-icon, .audience-icon {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.benefit-icon, .audience-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--primary-light);
    margin-bottom: 20px;
}

.audience-icon.student { background-color: #e8f0fe; }
.audience-icon.teacher { background-color: #fef7e0; }
.audience-icon.researcher { background-color: #e6f4ea; }
.audience-icon.analyst { background-color: #f3e8fd; }

/* ===== PRICE SECTION ===== */
.price-section {
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    color: white;
}

.price-card {
    background: white;
    border-radius: var(--radius);
    padding: 60px 40px;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
    box-shadow: var(--shadow-hover);
    color: var(--text-dark);
}

.price-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-blue);
    padding: 8px 20px;
    border-radius: 50px;
    font-weight: 600;
    margin-bottom: 20px;
}

.price-amount {
    font-size: 5rem;
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1;
}

.currency {
    font-size: 3rem;
}

.price-period {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

.price-description {
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.price-features {
    list-style: none;
    margin-bottom: 40px;
    text-align: left;
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

.price-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.price-features i {
    color: var(--accent-blue);
    margin-right: 10px;
}

/* ===== STEPS ===== */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.step {
    text-align: center;
    padding: 30px 20px;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--primary-blue);
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 20px;
}

/* ===== FORM ===== */
.request-form {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

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

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

.required {
    color: #ea4335;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--gray-border);
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-group input {
    width: auto;
    margin-top: 5px;
}

.checkbox-group label {
    font-weight: normal;
    font-size: 0.95rem;
}

.submit-button {
    width: 100%;
    margin-top: 20px;
}

.button-loading {
    display: none;
}

.form-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    display: none;
}

.form-message.success {
    background-color: #e6f4ea;
    color: #137333;
    display: block;
}

.form-message.error {
    background-color: #fce8e6;
    color: #c5221f;
    display: block;
}

.error-message {
    color: #c5221f;
    font-size: 0.9rem;
    margin-top: 5px;
    min-height: 20px;
}

/* ===== FAQ ===== */
.faq {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 15px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.faq-question {
    background: white;
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--primary-light);
}

.faq-question h3 {
    margin-bottom: 0;
    font-size: 1.1rem;
}

.faq-question i {
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    background: white;
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 500px;
}

/* ===== CONTACTS ===== */
.contacts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    background: white;
    padding: 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-blue);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.footer-logo h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.footer-logo span {
    color: var(--primary-blue);
}

.footer-links {
    display: flex;
    gap: 30px;
    margin: 30px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    color: #bdc1c6;
    text-decoration: none;
    transition: var(--transition);
}

.footer-link:hover {
    color: white;
}

.footer-copyright {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #3c4043;
    width: 100%;
    color: #9aa0a6;
    font-size: 0.9rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    h1 { font-size: 2.8rem; }
    h2 { font-size: 2.2rem; }
    .hero-title { font-size: 2.8rem; }
    .price-amount { font-size: 4rem; }
}

@media (max-width: 768px) {
    section, .section { padding: 60px 0; }
    h1 { font-size: 2.3rem; }
    h2 { font-size: 1.8rem; }
    .hero-title { font-size: 2.3rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .price-amount { font-size: 3.5rem; }
    .request-form { padding: 30px 20px; }
    .contact-item { flex-direction: column; text-align: center; }
    .floating-card { width: 100%; max-width: 250px; }
}

@media (max-width: 576px) {
    .features-grid, .benefits-grid, .audience-grid {
        grid-template-columns: 1fr;
    }
    .steps { grid-template-columns: 1fr; }
    .footer-links { flex-direction: column; gap: 15px; }
    .cta-button { padding: 15px 30px; }
}


/* SEO текст секция */
.seo-text {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 60px 0;
    margin: 40px 0;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.seo-content {
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.7;
    color: #333;
}

.seo-content h2 {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 30px;
    text-align: center;
    border-bottom: 3px solid #3498db;
    padding-bottom: 15px;
}

.seo-content h3 {
    color: #2c3e50;
    font-size: 1.6rem;
    margin: 35px 0 15px;
    padding-left: 15px;
    border-left: 4px solid #3498db;
}

.seo-content h4 {
    color: #34495e;
    font-size: 1.3rem;
    margin: 25px 0 10px;
}

.seo-content p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    text-align: justify;
}

.seo-content ul {
    margin: 15px 0 25px 25px;
    padding-left: 20px;
}

.seo-content li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 10px;
}

.seo-content li:before {
    content: "•";
    color: #3498db;
    font-weight: bold;
    position: absolute;
    left: -15px;
}

.seo-benefits {
    background: #e8f4fc;
    padding: 25px;
    border-radius: 10px;
    margin: 25px 0;
    border-left: 5px solid #3498db;
}

.seo-keywords {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 25px 0;
    font-style: italic;
    border: 1px dashed #ddd;
}

.seo-keywords p {
    color: #555;
    font-size: 1rem;
    line-height: 1.6;
}

.seo-cta {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    padding: 25px;
    border-radius: 10px;
    margin: 30px 0;
    text-align: center;
}

.seo-cta p {
    color: white;
    font-size: 1.2rem;
    margin: 0;
}

.seo-article {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

/* Адаптивность */
@media (max-width: 768px) {
    .seo-content {
        padding: 0 15px;
    }
    
    .seo-content h2 {
        font-size: 1.8rem;
    }
    
    .seo-content h3 {
        font-size: 1.4rem;
    }
    
    .seo-article {
        padding: 25px;
    }
    
    .seo-benefits,
    .seo-keywords,
    .seo-cta {
        padding: 20px;
    }
}