:root {
    --bg-main: #FAFAFA;
    --bg-card: #FFFFFF;
    --border-color: #EFEFEF;
    --border-hover: #D0D0D0;
    --accent-primary: #FF6200; 
    --accent-primary-hover: #E55800;
    --accent-invert: #FFFFFF;
    --text-primary: #1A1A1A; 
    --text-secondary: #666666;
    --shadow-base: 0 4px 12px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 12px 24px rgba(0, 0, 0, 0.08);
    --transition: all 0.2s ease;
    --radius-md: 6px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    --container-width: 1100px;
}
html {
    scroll-behavior: smooth;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 5vw;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}
.btn-primary {
    background: var(--accent-primary);
    color: var(--accent-invert);
    font-weight: 600;
}
.btn-primary:hover {
    background: var(--accent-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 98, 0, 0.2);
}
.btn-outline {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-color);
    box-shadow: var(--shadow-base);
}
.btn-outline:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
}
.btn-large { padding: 12px 28px; font-size: 1rem; }
.announcement-bar {
    background-color: var(--accent-primary);
    color: #FFFFFF;
    padding: 10px 0;
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 1001;
    overflow: hidden;
    white-space: nowrap;
    display: flex;
}
.marquee-content {
    display: flex;
    animation: marquee 60s linear infinite;
}
.marquee-content span {
    padding-right: 50px; 
}
@keyframes marquee {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); } 
}
.navbar {
    position: sticky; 
    top: 0; left: 0; width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}
.nav-content { display: flex; justify-content: space-between; align-items: center; height: 65px; }
.logo { font-size: 1.4rem; font-weight: 800; letter-spacing: -0.04em; color: var(--accent-primary); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a:not(.btn) { color: var(--text-secondary); font-size: 0.95rem; font-weight: 500;}
.nav-links a:not(.btn):hover { color: var(--text-primary); }
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 60px; 
    text-align: center;
}
.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.badge {
    background: #FFF3E5; 
    color: var(--accent-primary);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid rgba(255, 98, 0, 0.2);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.04em;
    color: var(--text-primary);
}
.text-gradient {
    color: var(--accent-primary); 
}
.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 650px;
    line-height: 1.5;
}
.hero-buttons { display: flex; gap: 16px; margin-top: 16px; }
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    position: relative;
    transition: var(--transition);
    box-shadow: var(--shadow-base);
}
.glass-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}
.padding-y { padding: 120px 0; }
.text-center { text-align: center; }
.section-header { margin-bottom: 60px; }
.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}
.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 550px;
    margin: 0 auto;
}
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.step-card {
    padding: 32px 20px;
    text-align: left;
}
.step-number {
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 24px;
    display: block;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}
.step-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}
.step-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.bot-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-base);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.bot-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}
.bot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}
.bot-category {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
    background: #FFF3E5;
    padding: 4px 10px;
    border-radius: var(--radius-md);
}
.bot-price {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}
.bot-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.bot-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 32px;
    flex-grow: 1; 
}
.bot-footer {
    margin-top: auto;
}
.bot-footer .btn {
    width: 100%;
}
.bg-white {
    background-color: #FFFFFF;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.security-content {
    max-width: 800px;
    margin: 0 auto;
}
.security-content .badge {
    margin-bottom: 16px;
    display: inline-block;
}
.security-list {
    list-style: none;
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.security-list li {
    padding-left: 24px;
    border-left: 3px solid var(--accent-primary);
}
.security-list strong {
    display: block;
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.security-list li {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}
.footer {
    background-color: #FAF8F6;
    padding: 80px 0 40px 0;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}
.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}
.footer-brand .logo {
    color: var(--text-primary);
    margin-bottom: 12px;
}
.footer-brand p {
    font-size: 0.95rem;
    max-width: 300px;
}
.link-group h4 {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    font-weight: 600;
}
.link-group a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}
.link-group a:hover {
    color: var(--accent-primary);
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    font-size: 0.85rem;
}
.stripe-badge {
    font-weight: 500;
    color: var(--text-primary);
}
@media screen and (max-width: 992px) {
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .use-cases-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-title { font-size: 3.5rem; }
}
@media screen and (max-width: 768px) {
    .padding-y { padding: 80px 0; }
    .nav-links a.btn-outline { display: none; }
    .nav-links > a:not(.btn) { display: none; } 
    .nav-links .btn-primary { padding: 6px 14px; font-size: 0.8rem; }
    .hero { min-height: auto; padding-top: 10vh; padding-bottom: 10vh; }
    .hero-title { font-size: 2.8rem; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 12px; }
    .hero-subtitle { font-size: 1.05rem; }
    .hero-content { gap: 16px; }
    .hero-buttons { flex-direction: column; width: 100%; gap: 16px; margin-top: 24px; }
    .hero-buttons .btn { width: 100%; justify-content: center; padding: 14px 20px;}
    .steps-grid, 
    .use-cases-grid, 
    .footer-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .step-card, .bot-card {
        padding: 24px 20px;
    }
    .section-header { margin-bottom: 40px; }
    .section-title { font-size: 2rem; line-height: 1.25; }
    .footer { padding: 60px 0 30px 0; }
    .link-group { text-align: center; margin-bottom: 16px; }
    .footer-brand { text-align: center; margin-bottom: 24px; }
    .footer-brand p { margin: 0 auto; }
    .footer-bottom { flex-direction: column; gap: 20px; text-align: center; }
}