:root {
    --guide-bg: #f5f7ff;
    --guide-ink: #172033;
    --guide-soft: #566078;
    --guide-faint: #798298;
    --guide-accent: #5268e8;
    --guide-accent2: #9d5de5;
    --guide-card: rgba(255, 255, 255, 0.78);
    --guide-border: rgba(100, 115, 160, 0.18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body.guide-page {
    min-height: 100vh;
    color: var(--guide-ink);
    background:
        radial-gradient(circle at 12% 8%, rgba(129, 151, 255, 0.30), transparent 28rem),
        radial-gradient(circle at 90% 20%, rgba(218, 141, 245, 0.24), transparent 30rem),
        var(--guide-bg);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.65;
}
a { color: var(--guide-accent); }
a:hover { color: var(--guide-accent2); }
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 200;
    padding: 10px 18px;
    border-radius: 0 0 12px 0;
    background: #fff;
    color: var(--guide-ink);
    font-weight: 700;
}
.skip-link:focus { left: 0; }
.guide-wrap { width: min(100% - 40px, 1080px); margin-inline: auto; }
.guide-nav {
    position: sticky;
    top: 12px;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 18px;
    width: min(100% - 24px, 1080px);
    margin: 12px auto 0;
    padding: 10px 18px;
    border: 1px solid var(--guide-border);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 18px 50px rgba(35, 42, 77, 0.10);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
}
.guide-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--guide-ink);
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.4px;
    text-decoration: none;
}
.guide-brand img {
    display: block;
    width: 48px;
    height: 48px;
    border-radius: 15px;
    box-shadow: 0 7px 18px rgba(30, 38, 82, 0.20);
}
.guide-nav ul { display: flex; align-items: center; gap: 5px; margin-left: auto; list-style: none; }
.guide-nav a:not(.guide-brand) {
    display: inline-block;
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--guide-soft);
    font-size: 14px;
    font-weight: 650;
    text-decoration: none;
}
.guide-nav a:not(.guide-brand):hover { background: #fff; color: var(--guide-ink); }
.guide-nav .guide-cta {
    padding: 9px 14px !important;
    background: linear-gradient(135deg, var(--guide-accent), var(--guide-accent2));
    color: #fff !important;
}
.breadcrumbs { padding-top: 52px; color: var(--guide-faint); font-size: 14px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #a0a7b7; }
.breadcrumbs a { color: var(--guide-soft); }
.guide-hero { max-width: 870px; padding: 34px 0 48px; }
.guide-kicker {
    margin-bottom: 10px;
    color: var(--guide-accent);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 1.8px;
    text-transform: uppercase;
}
.guide-hero h1 {
    max-width: 850px;
    margin-bottom: 18px;
    font-size: clamp(36px, 6vw, 60px);
    line-height: 1.08;
    letter-spacing: -1.8px;
}
.guide-lede { max-width: 760px; color: var(--guide-soft); font-size: clamp(17px, 2vw, 20px); line-height: 1.7; }
.guide-meta { margin-top: 18px; color: var(--guide-faint); font-size: 13.5px; }
.guide-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 44px;
    align-items: start;
    padding-bottom: 72px;
}
.guide-article { min-width: 0; }
.guide-article > section { margin-top: 52px; }
.guide-article > section:first-child { margin-top: 0; }
.guide-article > section > h2:first-child { margin-top: 0; }
.guide-article > section,
.guide-article > .answer-box,
.guide-article > .example-card { scroll-margin-top: 95px; }
.guide-article h2 {
    margin: 56px 0 16px;
    font-size: clamp(26px, 4vw, 36px);
    line-height: 1.2;
    letter-spacing: -0.8px;
}
.guide-article h2:first-child { margin-top: 0; }
.guide-article h3 {
    margin: 28px 0 8px;
    font-size: 20px;
    line-height: 1.3;
    letter-spacing: -0.3px;
}
.guide-article p { margin-bottom: 16px; color: var(--guide-soft); font-size: 16px; }
.guide-article ul,
.guide-article ol { margin: 0 0 18px 22px; color: var(--guide-soft); }
.guide-article li { margin-bottom: 8px; padding-left: 3px; }
.answer-box,
.step-card,
.example-card,
.tip-box,
.related-card {
    border: 1px solid var(--guide-border);
    border-radius: 20px;
    background: var(--guide-card);
    box-shadow: 0 16px 42px rgba(39, 48, 86, 0.07);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
}
.answer-box { padding: 26px 28px; }
.answer-box p:last-child { margin-bottom: 0; }
.step-list { display: grid; gap: 16px; margin-top: 22px; counter-reset: guide-step; }
.step-card { position: relative; padding: 26px 26px 24px 76px; counter-increment: guide-step; }
.step-card::before {
    content: counter(guide-step);
    position: absolute;
    top: 25px;
    left: 24px;
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--guide-accent), var(--guide-accent2));
    color: #fff;
    font-weight: 800;
}
.step-card h3 { margin-top: 0; }
.step-card p:last-child { margin-bottom: 0; }
.tip-box { margin: 24px 0; padding: 22px 24px; border-left: 4px solid var(--guide-accent); }
.tip-box strong { display: block; margin-bottom: 5px; }
.tip-box p { margin-bottom: 0; }
.branch-map {
    margin: 18px 0 0;
    padding: 20px 22px;
    overflow-x: auto;
    border-radius: 16px;
    background: #172033;
    color: #f7f8ff;
    font: 14px/1.75 ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    white-space: pre;
}
.example-grid { display: grid; gap: 18px; margin-top: 22px; }
.example-card { padding: 26px 28px; }
.example-card h2 { margin-top: 0; font-size: 25px; }
.example-card .best-for { color: var(--guide-accent); font-size: 14px; font-weight: 750; }
.example-card p:last-child { margin-bottom: 0; }
.guide-toc {
    position: sticky;
    top: 100px;
    padding: 24px;
    border: 1px solid var(--guide-border);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.70);
}
.guide-toc h2 { margin-bottom: 12px; font-size: 15px; letter-spacing: 0; }
.guide-toc ol { margin-left: 18px; color: var(--guide-soft); font-size: 14px; }
.guide-toc li { margin-bottom: 7px; }
.guide-toc a { color: var(--guide-soft); text-decoration: none; }
.guide-toc a:hover { color: var(--guide-accent); text-decoration: underline; }
.related { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 22px; }
.related-card { padding: 24px; }
.related-card h3 { margin-top: 0; }
.related-card p { font-size: 15px; }
.button-link {
    display: inline-block;
    padding: 12px 18px;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--guide-accent), var(--guide-accent2));
    color: #fff;
    font-weight: 750;
    text-decoration: none;
}
.button-link:hover { color: #fff; filter: brightness(1.05); }
.guide-footer { border-top: 1px solid var(--guide-border); padding: 30px 0 42px; }
.guide-footer .guide-wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; }
.guide-footer p,
.guide-footer a { color: var(--guide-faint); font-size: 13.5px; }
.guide-footer nav { display: flex; flex-wrap: wrap; gap: 16px; }
:focus-visible { outline: 3px solid var(--guide-accent); outline-offset: 3px; border-radius: 5px; }
@media (max-width: 820px) {
    .guide-layout { grid-template-columns: 1fr; }
    .guide-toc { position: static; grid-row: 1; }
    .related { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
    .guide-nav ul li:not(:last-child) { display: none; }
    .guide-hero { padding-top: 26px; }
    .breadcrumbs { padding-top: 38px; }
    .step-card { padding: 72px 22px 22px; }
    .step-card::before { top: 22px; left: 22px; }
    .answer-box,
    .example-card { padding: 22px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; }
}