/* LinkCube 绿叶 · linkecube.lol — 使用指南/教程站
   视觉系统：浅色文档风格，绿色点缀，左侧步骤导航，字号层级明显，与 linkecube.lat 完全不同的节奏 */

:root {
    --leaf: #16a34a;
    --leaf-deep: #15803d;
    --leaf-tint: #ecfdf3;
    --leaf-line: #bbf0ce;
    --ink: #12241c;
    --ink-soft: #4b5f56;
    --ink-dim: #8a988f;
    --bg: #ffffff;
    --bg-alt: #f6faf7;
    --line: #e3ece6;
    --warn-bg: #fff8ec;
    --warn-line: #f3d99b;
    --warn-ink: #92650c;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.75;
    font-size: 15.5px;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 6%; }

/* ---- Announce bar ---- */
.announce { background: var(--ink); color: #fff; text-align: center; font-size: 13px; padding: 8px 12px; }
.announce a { color: var(--leaf-line); font-weight: 600; }

/* ---- Header: guide-site style, logo left + step nav pills ---- */
header.site-head {
    border-bottom: 1px solid var(--line);
    position: sticky; top: 0; background: rgba(255,255,255,.94); backdrop-filter: blur(6px); z-index: 100;
}
.head-inner { max-width: 1080px; margin: 0 auto; padding: 0 6%; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 18px; color: var(--ink); }
.brand .mark { width: 30px; height: 30px; border-radius: 8px; background: var(--leaf); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.brand small { display: block; font-weight: 500; font-size: 11px; color: var(--ink-dim); }
.top-links { display: flex; gap: 4px; }
.top-links a { padding: 8px 14px; border-radius: 20px; font-size: 14px; color: var(--ink-soft); }
.top-links a:hover, .top-links a.active { background: var(--leaf-tint); color: var(--leaf-deep); }
.head-cta { display: flex; align-items: center; gap: 10px; }
.menu-toggle { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--ink); }
.mobile-nav { display: none; }

.btn { display: inline-block; padding: 10px 20px; border-radius: 8px; font-size: 14.5px; font-weight: 700; transition: all .2s; }
.btn-solid { background: var(--leaf); color: #fff; }
.btn-solid:hover { background: var(--leaf-deep); }
.btn-line { border: 1.5px solid var(--line); color: var(--ink); }
.btn-line:hover { border-color: var(--leaf); color: var(--leaf-deep); }
.btn-sm { padding: 7px 14px; font-size: 13px; }

/* ---- Breadcrumb ---- */
.crumb { font-size: 13px; color: var(--ink-dim); padding: 14px 0 0; }
.crumb a { color: var(--ink-soft); }
.crumb a:hover { color: var(--leaf-deep); }

/* ---- Hero: banner style unlike site1's centered hero ---- */
.hero { background: var(--bg-alt); border-bottom: 1px solid var(--line); padding: 46px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; }
.hero .eyebrow { display: inline-flex; align-items: center; gap: 6px; background: var(--leaf-tint); color: var(--leaf-deep); border: 1px solid var(--leaf-line); padding: 5px 12px; border-radius: 20px; font-size: 12.5px; font-weight: 700; margin-bottom: 16px; }
.hero h1 { font-size: 32px; line-height: 1.4; margin-bottom: 14px; }
.hero p.lead { color: var(--ink-soft); font-size: 16px; margin-bottom: 22px; max-width: 560px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-flow { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.hero-flow ol { counter-reset: fstep; display: flex; flex-direction: column; gap: 14px; }
.hero-flow li { counter-increment: fstep; display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--ink); }
.hero-flow li::before { content: counter(fstep); flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; background: var(--leaf); color: #fff; font-size: 13px; font-weight: 700; display: flex; align-items: center; justify-content: center; }

.page-head { background: var(--bg-alt); border-bottom: 1px solid var(--line); padding: 40px 0 32px; }
.page-head h1 { font-size: 28px; margin-bottom: 10px; }
.page-head p { color: var(--ink-soft); font-size: 15.5px; max-width: 640px; }
.page-head .meta { margin-top: 14px; font-size: 13px; color: var(--ink-dim); }

/* ---- Body layout with left step-nav (distinct from site1's right sidebar) ---- */
.doc-layout { display: grid; grid-template-columns: 230px 1fr; gap: 40px; padding: 44px 0 60px; align-items: start; }
.step-nav { position: sticky; top: 84px; }
.step-nav h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-dim); margin-bottom: 12px; }
.step-nav ol { counter-reset: snav; display: flex; flex-direction: column; gap: 4px; }
.step-nav ol li { counter-increment: snav; }
.step-nav ol li a { display: flex; gap: 10px; padding: 8px 10px; border-radius: 8px; font-size: 13.5px; color: var(--ink-soft); }
.step-nav ol li a::before { content: counter(snav); width: 18px; height: 18px; border-radius: 50%; background: var(--leaf-tint); color: var(--leaf-deep); font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.step-nav ol li a:hover { background: var(--bg-alt); color: var(--leaf-deep); }
.step-nav .side-box { margin-top: 22px; background: var(--leaf-tint); border: 1px solid var(--leaf-line); border-radius: 10px; padding: 16px; font-size: 13px; color: var(--ink); }
.step-nav .side-box a { color: var(--leaf-deep); font-weight: 700; }

/* ---- Sections ---- */
section.block { padding: 50px 0; }
section.block.alt { background: var(--bg-alt); }
.block-head { max-width: 640px; margin-bottom: 28px; }
.block-head span.tag { color: var(--leaf-deep); font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; display: block; margin-bottom: 8px; }
.block-head h2 { font-size: 24px; margin-bottom: 10px; }
.block-head p { color: var(--ink-soft); }

/* ---- Client tutorial entry cards: horizontal row style, not grid-3 like site1 ---- */
.client-row { display: flex; flex-direction: column; gap: 14px; }
.client-item { display: flex; align-items: center; gap: 18px; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; transition: border-color .2s, box-shadow .2s; }
.client-item:hover { border-color: var(--leaf); box-shadow: 0 6px 18px rgba(22,163,74,.08); }
.client-item .logo-badge { flex-shrink: 0; width: 46px; height: 46px; border-radius: 10px; background: var(--leaf-tint); color: var(--leaf-deep); display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 800; }
.client-item .body { flex: 1; }
.client-item h3 { font-size: 16px; margin-bottom: 4px; }
.client-item p { color: var(--ink-soft); font-size: 13.5px; }
.client-item .go { color: var(--leaf-deep); font-weight: 700; font-size: 13.5px; flex-shrink: 0; }

/* ---- Troubleshoot entry cards ---- */
.trouble-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.trouble-card { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: #fff; }
.trouble-card h3 { font-size: 15.5px; margin-bottom: 8px; display: flex; gap: 8px; align-items: center; }
.trouble-card h3 .dot { width: 8px; height: 8px; border-radius: 50%; background: #f0a63a; flex-shrink: 0; }
.trouble-card p { color: var(--ink-soft); font-size: 14px; }

/* ---- Prose ---- */
.prose { max-width: 760px; }
.prose h2 { font-size: 22px; margin: 38px 0 14px; padding-top: 4px; border-top: 1px solid var(--line); padding-top: 20px; }
.prose h2:first-child { border-top: none; padding-top: 0; margin-top: 0; }
.prose h3 { font-size: 17px; margin: 24px 0 10px; }
.prose p { color: var(--ink-soft); margin-bottom: 15px; }
.prose ul, .prose ol { margin: 0 0 18px; }
.prose ul li { color: var(--ink-soft); margin-bottom: 8px; padding-left: 20px; position: relative; }
.prose ul li::before { content: '•'; color: var(--leaf); position: absolute; left: 0; }
.prose ol { counter-reset: pstep; }
.prose ol li { counter-increment: pstep; color: var(--ink-soft); margin-bottom: 10px; padding-left: 30px; position: relative; }
.prose ol li::before { content: counter(pstep); position: absolute; left: 0; top: 1px; width: 20px; height: 20px; border-radius: 6px; background: var(--leaf-tint); color: var(--leaf-deep); font-size: 11.5px; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.prose a { color: var(--leaf-deep); text-decoration: underline; }
.prose strong { color: var(--ink); }
.prose code { background: var(--bg-alt); border: 1px solid var(--line); padding: 2px 6px; border-radius: 4px; font-size: 13px; font-family: Consolas, monospace; }

/* ---- Callouts (distinct style: left border bar, not full box like site1) ---- */
.note { border-left: 4px solid var(--leaf); background: var(--bg-alt); padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 20px 0; font-size: 14px; color: var(--ink-soft); }
.note strong { color: var(--leaf-deep); }
.note.warn { border-left-color: #e7a53c; background: var(--warn-bg); color: var(--warn-ink); }
.note.warn strong { color: #b5790f; }

/* ---- Table (client comparison etc.) ---- */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
table.tbl { width: 100%; border-collapse: collapse; min-width: 620px; }
table.tbl th, table.tbl td { text-align: left; padding: 12px 16px; font-size: 13.5px; border-bottom: 1px solid var(--line); }
table.tbl th { background: var(--bg-alt); color: var(--leaf-deep); }
table.tbl tr:last-child td { border-bottom: none; }

/* ---- FAQ: accordion, plain list style unlike site1's card list ---- */
.faq-plain { max-width: 760px; border-top: 1px solid var(--line); }
.faq-plain details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq-plain summary { list-style: none; cursor: pointer; font-weight: 700; font-size: 15px; display: flex; justify-content: space-between; align-items: center; }
.faq-plain summary::-webkit-details-marker { display: none; }
.faq-plain summary::after { content: '⌄'; color: var(--leaf-deep); font-size: 18px; }
.faq-plain details[open] summary::after { content: '⌃'; }
.faq-plain p { color: var(--ink-soft); font-size: 14.5px; margin-top: 10px; }

/* ---- Related ---- */
.related-list { display: flex; flex-direction: column; gap: 10px; max-width: 760px; }
.related-list a { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border: 1px solid var(--line); border-radius: 10px; font-size: 14.5px; color: var(--ink); }
.related-list a:hover { border-color: var(--leaf); background: var(--leaf-tint); }
.related-list a span.arrow { color: var(--leaf-deep); }

/* ---- CTA band (contextual, brief — not pricing wall) ---- */
.cta-inline { display: flex; align-items: center; justify-content: space-between; gap: 20px; background: var(--ink); color: #fff; border-radius: 14px; padding: 26px 30px; flex-wrap: wrap; }
.cta-inline p { color: #d6e6dc; font-size: 14.5px; max-width: 480px; }
.cta-inline strong { color: #fff; }

/* ---- Footer: different column order/style from site1 ---- */
footer.site-foot { border-top: 1px solid var(--line); background: var(--bg-alt); padding: 46px 0 24px; margin-top: 30px; }
.foot-top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; margin-bottom: 30px; }
.foot-brand { max-width: 300px; }
.foot-brand .brand { margin-bottom: 10px; }
.foot-brand p { color: var(--ink-dim); font-size: 13.5px; }
.foot-cols { display: flex; gap: 50px; flex-wrap: wrap; }
.foot-col h5 { font-size: 13px; color: var(--ink-dim); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 12px; }
.foot-col ul li { margin-bottom: 8px; font-size: 14px; }
.foot-col ul li a { color: var(--ink-soft); }
.foot-col ul li a:hover { color: var(--leaf-deep); }
.foot-bottom { border-top: 1px solid var(--line); padding-top: 18px; font-size: 12.5px; color: var(--ink-dim); }
.foot-bottom p { margin-bottom: 6px; }

/* ---- Simple pages ---- */
.simple { max-width: 740px; padding: 40px 0 60px; }
.simple h1 { font-size: 26px; margin-bottom: 18px; }
.simple h2 { font-size: 18px; margin: 26px 0 10px; }
.simple p { color: var(--ink-soft); margin-bottom: 14px; }
.simple ul { margin: 0 0 14px 20px; list-style: disc; }
.simple ul li { color: var(--ink-soft); margin-bottom: 8px; }
.sitemap-cols { columns: 2; gap: 40px; }
.sitemap-cols li { margin-bottom: 9px; break-inside: avoid; }
.sitemap-cols a { color: var(--leaf-deep); }

/* ---- 404 ---- */
.notfound { text-align: center; padding: 110px 6%; }
.notfound .code { font-size: 80px; font-weight: 800; color: var(--leaf); }
.notfound h1 { font-size: 22px; margin: 10px 0 16px; }
.notfound p { color: var(--ink-soft); margin-bottom: 22px; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; }
    .doc-layout { grid-template-columns: 1fr; }
    .step-nav { position: static; margin-bottom: 20px; }
    .trouble-grid { grid-template-columns: 1fr; }
    .foot-cols { gap: 30px; }
}
@media (max-width: 640px) {
    .top-links { display: none; }
    .menu-toggle { display: block; }
    .mobile-nav { display: none; flex-direction: column; padding: 14px 6% 20px; border-bottom: 1px solid var(--line); background: #fff; }
    .mobile-nav.active { display: flex; }
    .mobile-nav a { padding: 10px 0; color: var(--ink-soft); font-size: 15px; }
    .hero h1 { font-size: 24px; }
    .client-item { flex-wrap: wrap; }
    .cta-inline { flex-direction: column; align-items: flex-start; }
    .foot-top { flex-direction: column; }
    .sitemap-cols { columns: 1; }
    table.tbl { min-width: 560px; }
    section.block { padding: 36px 0; }
}