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

:root {
    --bg: #ffffff;
    --bg-alt: #f5f7fa;
    --bg-dark: #0d1421;
    --text: #1a1f2b;
    --text-muted: #5a6472;
    --accent: #2f6feb;
    --accent-dark: #2559c4;
    --border: #e3e8ef;
    --radius: 10px;
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.65;
    font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}
.container.narrow { max-width: 780px; }

/* Header */
.site-header {
    border-bottom: 1px solid var(--border);
    background: #fff;
    position: sticky; top: 0; z-index: 50;
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 66px;
}
.logo {
    display: flex; align-items: center; gap: 10px;
    color: var(--text); font-weight: 600; font-size: 17px;
    text-decoration: none;
}
.logo-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 30px; height: 30px; background: var(--accent); color: #fff;
    border-radius: 7px; font-weight: 700; font-size: 15px;
}
.logo-accent { color: var(--accent); }

.main-nav a {
    margin-left: 26px;
    color: var(--text-muted);
    font-size: 15px;
    text-decoration: none;
    transition: color .15s;
}
.main-nav a:hover, .main-nav a.active { color: var(--accent); }

/* Hero */
.hero {
    padding: 100px 0 90px;
    background: linear-gradient(180deg, #fbfcfe 0%, #ffffff 100%);
    text-align: center;
}
.eyebrow {
    display: inline-block;
    padding: 5px 12px;
    background: #eef3ff;
    color: var(--accent);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}
.hero h1 {
    font-size: 44px; line-height: 1.15; font-weight: 700;
    letter-spacing: -0.02em; margin-bottom: 20px;
}
.hero-sub {
    font-size: 18px; color: var(--text-muted);
    max-width: 640px; margin: 0 auto 32px;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.hero-stats {
    display: flex; justify-content: center; gap: 48px;
    margin-top: 56px; flex-wrap: wrap;
}
.hero-stats > div { text-align: center; }
.hero-stats strong {
    display: block; font-size: 28px; font-weight: 700;
    color: var(--text); letter-spacing: -0.01em;
}
.hero-stats span { font-size: 14px; color: var(--text-muted); }

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: background .15s, border-color .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); text-decoration: none; }

.btn-secondary {
    background: #fff; color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* Sections */
section h2 {
    font-size: 28px; font-weight: 700; letter-spacing: -0.01em;
    margin-bottom: 8px;
}
.section-sub {
    font-size: 16px; color: var(--text-muted);
    margin-bottom: 32px; max-width: 640px;
}

.features { padding: 80px 0; background: var(--bg-alt); }
.cards {
    display: grid;
    grid-template-columns: