/* FeedLens 项目介绍页与文档中心。只用相对路径，可整体放到任意静态托管或个人网站的子目录下。 */
:root {
  --bg: #f4f1ea; --surface: #fffdf8; --surface-2: #ece8de; --ink: #1a1c1a; --muted: #5f645f; --line: #ddd7ca;
  --accent: #0e5e52; --accent-ink: #fff; --accent-soft: #dcebe6;
  --high: #b93c0b; --high-bg: #fbe4d5; --mid: #8f5a05; --mid-bg: #f7eac6; --low: #4b5563; --low-bg: #e7e4dc;
  --ok: #166534; --ok-bg: #dcefe2; --todo: #8f5a05; --todo-bg: #f7eac6;
  --radius: 14px; --shadow: 0 1px 2px rgba(26,28,26,.05), 0 8px 24px -12px rgba(26,28,26,.18);
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", STSong, "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412; --surface: #1a1d1a; --surface-2: #232723; --ink: #ece9e1; --muted: #a3a69f; --line: #2e332e;
    --accent: #5fc2ae; --accent-ink: #0c1512; --accent-soft: #1d3a34;
    --high: #ff9a6b; --high-bg: #3d2114; --mid: #e6bd5a; --mid-bg: #37290e; --low: #b3b8bf; --low-bg: #2a2d2a;
    --ok: #74d39a; --ok-bg: #173323; --todo: #e6bd5a; --todo-bg: #37290e;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 28px -14px rgba(0,0,0,.7);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.75; }
a { color: var(--accent); text-underline-offset: 3px; }
h1, h2, h3, h4 { line-height: 1.35; margin: 0; }
code { font-family: var(--mono); font-size: .86em; background: var(--surface-2); padding: .12em .4em; border-radius: 5px; word-break: break-word; }
pre { background: var(--surface-2); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-size: .86rem; line-height: 1.6; }
pre code { background: none; padding: 0; word-break: normal; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.muted { color: var(--muted); } .small { font-size: .875rem; }

/* 顶栏 */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top__in { max-width: 1180px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; gap: 16px; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; }
.brand svg { width: 26px; height: 26px; color: var(--accent); }
.brand b { font-family: var(--serif); font-size: 1.15rem; }
.brand span { color: var(--muted); font-size: .85rem; padding-left: 8px; border-left: 1px solid var(--line); }
.top nav { margin-left: auto; display: flex; gap: 4px; align-items: center; overflow-x: auto; scrollbar-width: none; }
.top nav a { padding: 7px 12px; border-radius: 9px; color: var(--muted); text-decoration: none; font-size: .93rem; white-space: nowrap; }
.top nav a:hover { background: var(--surface-2); color: var(--ink); }
.top nav a.cta { background: var(--accent); color: var(--accent-ink); font-weight: 600; }

/* 介绍页 */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.hero { padding: 64px 0 40px; }
.eyebrow { color: var(--accent); font-size: .8rem; font-weight: 700; letter-spacing: .14em; margin: 0 0 12px; }
.hero h1 { font-family: var(--serif); font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 700; letter-spacing: -.01em; }
.hero p.lede { font-size: 1.12rem; color: var(--muted); max-width: 40em; margin: 18px 0 0; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.pill { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 5px 13px; font-size: .85rem; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 10px; font-weight: 600; text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: var(--surface); }
.btn--primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
section.block { padding: 44px 0; border-top: 1px solid var(--line); }
section.block > h2 { font-family: var(--serif); font-size: clamp(1.4rem, 3vw, 1.9rem); }
section.block > p.sub { color: var(--muted); margin: 8px 0 0; max-width: 46em; }
.grid { display: grid; gap: 16px; margin-top: 24px; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card h3 { font-family: var(--serif); font-size: 1.1rem; margin-bottom: 8px; }
.card p, .card li { color: var(--muted); font-size: .95rem; }
.card p { margin: 0; } .card ul { margin: 0; padding-left: 1.15em; } .card li + li { margin-top: 5px; }
.card .num { font-family: var(--serif); font-size: 2.3rem; font-weight: 700; line-height: 1.15; color: var(--ink); font-variant-numeric: tabular-nums; }
.card .num small { font-family: var(--sans); font-size: .9rem; font-weight: 500; color: var(--muted); margin-left: 3px; }
.card .cap { font-size: .82rem; color: var(--muted); margin-top: 4px; }
.step-n { display: inline-flex; width: 28px; height: 28px; align-items: center; justify-content: center; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .9rem; margin-bottom: 10px; }
.cmp { margin-top: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.cmp h3 { font-size: 1rem; margin-bottom: 4px; } .cmp .note { color: var(--muted); font-size: .85rem; margin: 0 0 14px; }
.hbar { display: grid; grid-template-columns: minmax(9em, 17em) 1fr 3.6em; gap: 12px; align-items: center; font-size: .9rem; }
.hbar + .hbar { margin-top: 9px; }
.hbar__name b { display: block; font-weight: 600; } .hbar__name span { color: var(--muted); font-size: .78rem; }
.track { height: 14px; border-radius: 7px; background: var(--surface-2); overflow: hidden; }
.fill { height: 100%; border-radius: 7px; background: color-mix(in srgb, var(--muted) 55%, transparent); min-width: 2px; }
.fill--ours { background: var(--accent); }
.hbar__v { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.caveat { margin-top: 18px; border-left: 4px solid var(--mid); background: var(--mid-bg); color: var(--ink); padding: 14px 18px; border-radius: 0 12px 12px 0; font-size: .93rem; }
.caveat b { color: var(--mid); }
.ticket { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.ticket q { display: block; color: var(--muted); font-size: .92rem; quotes: none; border-left: 3px solid var(--line); padding-left: 12px; }
.ticket h4 { font-family: var(--serif); font-size: 1.25rem; margin: 12px 0 10px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { padding: 3px 11px; border-radius: 999px; font-size: .82rem; font-weight: 700; background: var(--accent-soft); color: var(--accent); }
.tag--高 { background: var(--high-bg); color: var(--high); } .tag--中 { background: var(--mid-bg); color: var(--mid); } .tag--低 { background: var(--low-bg); color: var(--low); }
.tag--plain { background: var(--surface-2); color: var(--ink); font-weight: 500; }
.flow { margin-top: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; overflow-x: auto; }
.flow svg { min-width: 760px; width: 100%; height: auto; display: block; }
.status-list { list-style: none; margin: 0; padding: 0; }
.status-list li { display: flex; gap: 10px; align-items: baseline; padding: 7px 0; border-bottom: 1px dashed var(--line); font-size: .95rem; color: var(--ink); }
.status-list li:last-child { border-bottom: 0; }
.badge { flex-shrink: 0; font-size: .74rem; font-weight: 700; padding: 2px 9px; border-radius: 999px; }
.badge--done { background: var(--ok-bg); color: var(--ok); } .badge--todo { background: var(--todo-bg); color: var(--todo); } .badge--miss { background: var(--high-bg); color: var(--high); }
.verdict { margin-top: 24px; border: 1px solid var(--line); border-left: 4px solid var(--high); border-radius: 0 var(--radius) var(--radius) 0; background: var(--surface); padding: 18px 22px; }
.verdict h3 { font-family: var(--serif); font-size: 1.1rem; margin-bottom: 6px; } .verdict p { margin: 0; }
.verdict + .grid { margin-top: 16px; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.doc-links a { display: block; text-decoration: none; color: inherit; height: 100%; }
.doc-links a:hover .card { border-color: var(--accent); }
.doc-links .card h3 { color: var(--accent); }
footer.foot { border-top: 1px solid var(--line); padding: 24px 20px 40px; text-align: center; color: var(--muted); font-size: .85rem; }

/* 文档页 */
.doc { max-width: 1180px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 232px minmax(0, 1fr); gap: 40px; align-items: start; }
.side { position: sticky; top: 64px; padding: 26px 0; max-height: calc(100vh - 64px); overflow-y: auto; font-size: .92rem; }
.side h4 { font-size: .74rem; letter-spacing: .12em; color: var(--muted); margin: 18px 0 6px; font-weight: 700; }
.side h4:first-child { margin-top: 0; }
.side a { display: block; padding: 5px 10px; border-radius: 8px; color: var(--ink); text-decoration: none; }
.side a:hover { background: var(--surface-2); }
.side a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.side-toggle { display: none; }
article.md { padding: 34px 0 72px; min-width: 0; max-width: 820px; }
article.md h1 { font-family: var(--serif); font-size: clamp(1.7rem, 3.6vw, 2.3rem); margin-bottom: 18px; }
article.md h2 { font-family: var(--serif); font-size: 1.4rem; margin: 40px 0 12px; padding-top: 18px; border-top: 1px solid var(--line); }
article.md h3 { font-size: 1.1rem; margin: 26px 0 8px; }
article.md h4 { font-size: 1rem; margin: 20px 0 6px; }
article.md p { margin: 12px 0; }
article.md ul, article.md ol { padding-left: 1.4em; margin: 12px 0; }
article.md li + li { margin-top: 4px; }
article.md blockquote { margin: 16px 0; padding: 12px 18px; border-left: 4px solid var(--accent); background: var(--surface); border-radius: 0 12px 12px 0; color: var(--ink); }
article.md blockquote p { margin: 6px 0; }
article.md blockquote .table-wrap { margin: 10px 0; }
.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--surface-2); font-weight: 600; font-size: .84rem; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
pre.mermaid { background: var(--surface); border: 1px solid var(--line); text-align: center; }
.codepath { font-family: var(--mono); font-size: .86em; background: var(--surface-2); padding: .12em .4em; border-radius: 5px; }
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); font-size: .93rem; }
.pager a { text-decoration: none; }
.gen-note { margin-top: 28px; color: var(--muted); font-size: .8rem; }

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .doc { grid-template-columns: 1fr; gap: 0; }
  .side { position: static; max-height: none; padding: 14px 0 0; display: none; }
  .side[data-open="true"] { display: block; }
  .side-toggle { display: inline-flex; margin-top: 16px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 9px; padding: 8px 14px; font: inherit; font-size: .9rem; cursor: pointer; }
  article.md { padding-top: 20px; }
}
@media (max-width: 620px) {
  .grid--3, .grid--2, .grid--4 { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 28px; }
  .brand span { display: none; }
  .hbar { grid-template-columns: 1fr 3.6em; } .hbar__name { grid-column: 1 / -1; }
  section.block { padding: 34px 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }