@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #1e293b;
    background: #ffffff;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

header.scrolled {
    padding: 12px 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
}

.header-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #0f172a;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo span {
    color: #0ea5e9;
}

nav {
    display: flex;
    gap: 8px;
}

nav a {
    color: #64748b;
    text-decoration: none;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    transition: all 0.3s ease;
}

nav a:hover {
    color: #0ea5e9;
    background: rgba(56, 189, 248, 0.08);
}

nav a.active {
    color: #fff;
    background: #0ea5e9;
}

.hero-section {
    padding: 180px 0 160px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #bae6fd 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -400px;
    right: -200px;
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, transparent 60%);
    border-radius: 50%;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -300px;
    left: -150px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 60%);
    border-radius: 50%;
}

.hero-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 32px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    color: #0369a1;
    margin-bottom: 36px;
}

.hero-content h1 {
    font-size: 64px;
    font-weight: 700;
    color: #0f172a;
    line-height: 1.1;
    margin-bottom: 32px;
    letter-spacing: -2px;
}

.hero-content h1 span {
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 20px;
    color: #64748b;
    max-width: 680px;
    margin: 0 auto 48px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 40px;
    font-size: 17px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 12px 32px rgba(56, 189, 248, 0.35);
    text-decoration: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(56, 189, 248, 0.45);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 40px;
    font-size: 17px;
    font-weight: 600;
    color: #0f172a;
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(56, 189, 248, 0.3);
}

.features-section {
    padding: 80px 0;
    background: #fff;
}

.features-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 32px;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 16px;
    color: #64748b;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.04);
    border-radius: 20px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    background: #fff;
    border-color: rgba(56, 189, 248, 0.2);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.08), rgba(3, 105, 161, 0.08));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 26px;
    height: 26px;
    fill: #0ea5e9;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: #0f172a;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

.pro-badge {
    display: inline-block;
    padding: 3px 10px;
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    border-radius: 10px;
    margin-left: 6px;
}

.page-main {
    max-width: 800px;
    margin: 0 auto;
    padding: 140px 32px 80px;
}

.page-header {
    margin-bottom: 50px;
}

.page-title {
    font-size: 36px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.page-subtitle {
    font-size: 14px;
    color: #94a3b8;
}

.content-section {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.content-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.content-section h2 {
    font-size: 20px;
    font-weight: 600;
    color: #0f172a;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-section h2::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(180deg, #0ea5e9, #0284c7);
    border-radius: 2px;
}

.content-section h3 {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    margin: 18px 0 10px;
}

.content-section p {
    font-size: 15px;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 14px;
}

.content-section ul {
    margin: 16px 0;
    padding-left: 22px;
}

.content-section li {
    font-size: 15px;
    color: #475569;
    line-height: 1.7;
    margin-bottom: 10px;
}

.content-section li::marker {
    color: #0ea5e9;
}

.content-section a {
    color: #0ea5e9;
    text-decoration: none;
}

footer {
    padding: 50px 0 30px;
    background: #f8fafc;
}

.footer-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 32px;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
}

.footer-links a {
    font-size: 14px;
    color: #64748b;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #0ea5e9;
}

.footer-copyright {
    font-size: 12px;
    color: #94a3b8;
}

@media (max-width: 768px) {
    .header-container,
    .hero-container,
    .features-container,
    .page-main,
    .footer-container {
        padding: 0 20px;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 16px;
    }

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

    .btn-primary,
    .btn-secondary {
        padding: 12px 24px;
        font-size: 14px;
    }

    .page-title {
        font-size: 28px;
    }

    .page-main {
        padding-top: 120px;
    }

    nav a {
        padding: 6px 14px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}