:root {
    --primary: #4f6ef7;
    --text: #1d2335;
    --muted: #626b80;
    --line: #e6e9f1;
    --soft: #f5f7ff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    color: var(--text);
    background: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.8;
}

a { color: var(--primary); text-decoration: none; }

.guide-container {
    width: min(100% - 40px, 860px);
    margin: 0 auto;
}

.guide-header {
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, .96);
}

.header-inner {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.guide-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-size: 18px;
    font-weight: 700;
}

.guide-logo img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.download-link {
    padding: 8px 17px;
    border-radius: 8px;
    color: #fff;
    background: var(--primary);
    font-weight: 600;
}

.guide-article { padding: 42px 0 64px; }

.breadcrumb {
    display: flex;
    gap: 8px;
    margin-bottom: 18px;
    color: var(--muted);
    font-size: 14px;
}

h1 {
    max-width: 760px;
    margin: 0 0 18px;
    font-size: clamp(30px, 5vw, 44px);
    line-height: 1.3;
    letter-spacing: -.02em;
}

.guide-intro {
    margin: 0 0 42px;
    padding: 20px 22px;
    border-left: 4px solid var(--primary);
    color: #424b61;
    background: var(--soft);
    font-size: 17px;
}

.guide-article section { margin-top: 38px; }

h2 {
    margin: 0 0 10px;
    font-size: 24px;
    line-height: 1.45;
}

h3 { margin: 0 0 4px; font-size: 18px; }

p { margin: 0; color: var(--muted); }

.guide-faq {
    padding-top: 8px;
    border-top: 1px solid var(--line);
}

.faq-row {
    padding: 17px 0;
    border-bottom: 1px solid var(--line);
}

.guide-cta {
    margin-top: 46px;
    padding: 26px;
    border-radius: 14px;
    background: var(--soft);
}

.guide-cta h2 { font-size: 22px; }

.guide-cta a {
    display: inline-block;
    margin-top: 14px;
    padding: 9px 18px;
    border-radius: 8px;
    color: #fff;
    background: var(--primary);
    font-weight: 600;
}

.related-guides {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 22px;
    margin-top: 34px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
}

.guide-footer {
    padding: 24px 0;
    color: var(--muted);
    background: #f7f8fb;
    font-size: 14px;
}

@media (max-width: 600px) {
    .guide-container { width: min(100% - 30px, 860px); }
    .guide-article { padding-top: 28px; }
    .guide-intro { padding: 17px; font-size: 16px; }
    h2 { font-size: 21px; }
}