/* Hero Section */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: var(--bg-color);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(24, 24, 27, 0.03) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(24, 24, 27, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--text-color);
    letter-spacing: -0.035em;
}

.hero h1 span {
    background: linear-gradient(135deg, #18181b 0%, #52525b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-note {
    margin-top: 20px;
    font-size: 0.8125rem;
    color: var(--text-light);
}

/* Features Section */
.features {
    padding: 96px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.03em;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 56px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-color);
}

.feature-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    background: var(--primary-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
}

.feature-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* How It Works */
.how-it-works {
    padding: 96px 0;
    background: var(--card-bg);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.steps-list {
    display: flex;
    gap: 32px;
    justify-content: center;
    max-width: 900px;
    margin: 0 auto;
}

.step-item {
    flex: 1;
    text-align: center;
    position: relative;
}

.step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 24px;
    right: -16px;
    width: 32px;
    height: 1px;
    background: var(--border-color);
}

.step-num {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    font-weight: 700;
}

.step-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.step-item p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* Pricing Section */
.pricing {
    padding: 96px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    border: 1px solid var(--border-light);
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.pricing-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.03);
}

.pricing-card.featured:hover {
    transform: scale(1.03) translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: #fff;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.pricing-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
    text-align: center;
}

.pricing-price {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 4px;
    letter-spacing: -0.03em;
    text-align: center;
}

.pricing-price small {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-period {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    text-align: center;
}

.pricing-features {
    list-style: none;
    margin-bottom: 24px;
    flex: 1;
}

.pricing-features li {
    padding: 8px 0;
    font-size: 0.875rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.pricing-features li::before {
    content: '';
    width: 18px;
    height: 18px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2318181b' stroke-width='2.5'%3E%3Cpolyline points='20,6 9,17 4,12'/%3E%3C/svg%3E") no-repeat center;
    flex-shrink: 0;
}

.pricing-features li.disabled {
    color: var(--text-light);
}

.pricing-features li.disabled::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2.5'%3E%3Cline x1='18' y1='6' x2='6' y2='18'/%3E%3Cline x1='6' y1='6' x2='18' y2='18'/%3E%3C/svg%3E");
}

/* Why Choose Us */
.why-choose {
    padding: 96px 0;
    background: var(--card-bg);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.why-card {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    border: 1px solid var(--border-light);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.why-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-color);
}

.why-card--highlight {
    border: 2px solid var(--primary-color);
    background: var(--bg-color);
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    column-gap: 20px;
    padding: 32px 28px;
}

.why-card--highlight .why-icon {
    grid-row: 1 / -1;
    align-self: center;
    margin: 0;
    width: 56px;
    height: 56px;
    border-radius: 16px;
}

.why-card--highlight h3 {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.why-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 14px;
    background: var(--primary-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
}

.why-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.why-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* FAQ Section */
.faq {
    padding: 96px 0;
    background: var(--card-bg);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color 0.2s;
}

.faq-item[open] {
    border-color: var(--border-color);
}

.faq-item summary {
    padding: 20px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    list-style: none;
    letter-spacing: -0.02em;
    user-select: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '';
    width: 20px;
    height: 20px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E") no-repeat center;
    flex-shrink: 0;
    transition: transform 0.2s;
}

.faq-item[open] summary::after {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 24px 20px;
}

.faq-answer p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.faq-answer a {
    color: var(--text-color);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* CTA Section */
.cta-section {
    padding: 96px 0;
    text-align: center;
    background: var(--primary-color);
    color: #fff;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.03em;
}

.cta-section p {
    font-size: 1.0625rem;
    opacity: 0.7;
    margin-bottom: 36px;
}

.cta-section .btn {
    background: #fff;
    color: var(--primary-color);
    font-weight: 700;
}

.cta-section .btn:hover {
    background: #f4f4f5;
    transform: translateY(-1px);
}

/* Contact Section */
.contact-section {
    padding: 96px 0;
    background: var(--bg-color);
}

.contact-form {
    margin-top: 40px;
}

.contact-form .form-group {
    margin-bottom: 24px;
}

.contact-textarea {
    resize: vertical;
    min-height: 140px;
}

.required {
    color: var(--error-color);
    font-weight: 400;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 56px 0 48px;
    }

    .hero h1 {
        font-size: 2rem;
        letter-spacing: -0.03em;
    }

    .features, .how-it-works, .why-choose, .pricing, .faq, .cta-section, .contact-section {
        padding: 56px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps-list {
        flex-direction: column;
        gap: 24px;
    }

    .step-item:not(:last-child)::after {
        display: none;
    }

    .why-grid {
        grid-template-columns: 1fr;
    }

    .why-card--highlight {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }

    .why-card--highlight .why-icon {
        grid-row: auto;
        margin-bottom: 14px;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: none;
    }

    .section-title {
        font-size: 1.5rem;
    }
}