/* SKG 具身智能鸭子机器人 · 站点共享样式（专业亮色，单主题） */
:root {
  --paper: #FBFBF8;
  --card: #FFFFFF;
  --ink: #1C242E;
  --muted: #67717C;
  --line: #E4E4DC;
  --line-strong: #C9C9BE;
  --gold: #9A6F0B;
  --gold-strong: #7C590A;
  --gold-bg: #F7F0DC;
  --blue: #1F5FA8;
  --green: #25764C;
  --green-bg: #E9F3ED;
  --red: #A34040;
  --red-bg: #F8ECEC;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.8;
}
.wrap { max-width: 980px; margin: 0 auto; padding: 0 24px; }
.wide { max-width: 1100px; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
.mono { font-family: "IBM Plex Mono", "SF Mono", monospace; font-variant-numeric: tabular-nums; }
.serif { font-family: "Noto Serif SC", serif; }

/* 顶部导航 */
nav.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line-strong);
}
nav.site .wrap { display: flex; align-items: center; gap: 26px; height: 54px; }
nav.site .brand { font-family: "Noto Serif SC", serif; font-weight: 700; font-size: 16px; color: var(--ink); white-space: nowrap; }
nav.site .brand small { color: var(--muted); font-weight: 400; margin-left: 6px; font-family: "Noto Sans SC", sans-serif; }
nav.site .links { display: flex; gap: 22px; overflow-x: auto; }
nav.site .links a { color: var(--muted); font-size: 14px; font-weight: 500; white-space: nowrap; padding: 14px 0 12px; border-bottom: 2px solid transparent; }
nav.site .links a:hover { color: var(--ink); text-decoration: none; }
nav.site .links a.on { color: var(--ink); font-weight: 700; border-bottom-color: var(--gold); }

/* 页头 */
header.page { padding: 52px 0 34px; border-bottom: 1px solid var(--line-strong); background: var(--card); }
.eyebrow { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: .14em; color: var(--gold); text-transform: uppercase; }
h1 { font-family: "Noto Serif SC", serif; font-weight: 700; font-size: clamp(28px, 4.6vw, 40px); line-height: 1.3; margin: 8px 0 8px; text-wrap: balance; }
.pagedesc { color: var(--muted); max-width: 660px; margin: 0; }

section { padding: 46px 0 6px; }
h2 { font-family: "Noto Serif SC", serif; font-size: 21px; font-weight: 700; margin: 0 0 4px; display: flex; align-items: baseline; gap: 11px; }
h2 .no { font-family: "IBM Plex Mono", monospace; font-size: 13px; font-weight: 500; color: var(--gold); }
h3 { font-size: 16px; font-weight: 700; margin: 22px 0 8px; }
.rule { border: 0; border-top: 1px solid var(--line-strong); margin: 8px 0 18px; }
p { margin: 0 0 14px; max-width: 70ch; }
.lead { color: var(--muted); margin-bottom: 22px; }
ul.tight { margin: 0 0 14px; padding-left: 1.3em; }
ul.tight li { margin-bottom: 8px; max-width: 68ch; }

/* 统计条 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin: 24px 0 4px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 13px 16px 11px; }
.stat.hero { border-top: 3px solid var(--gold); }
.stat .k { font-size: 12px; color: var(--muted); letter-spacing: .05em; }
.stat .v { font-family: "IBM Plex Mono", monospace; font-size: 23px; font-weight: 500; margin-top: 1px; }
.stat .v small { font-size: 13px; color: var(--muted); font-family: "Noto Sans SC", sans-serif; }

/* 卡片与网格 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 16px 18px; }
.card h3 { margin: 0 0 6px; font-size: 15px; }
.card p { font-size: 14px; color: var(--muted); margin: 0; }

/* 表格 */
.tablewrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 6px; }
table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
th { text-align: left; font-size: 12px; letter-spacing: .07em; color: var(--muted); font-weight: 500; padding: 9px 14px; border-bottom: 1px solid var(--line-strong); white-space: nowrap; background: #FCFCF9; }
td { padding: 8px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.sum td { background: var(--gold-bg); font-weight: 700; }
tr.sub td { color: var(--muted); }
.tablecap { font-size: 13px; color: var(--muted); margin: 8px 2px 22px; max-width: 72ch; }

/* 标记 */
.tag { display: inline-block; font-size: 11.5px; font-weight: 500; border-radius: 4px; padding: 1px 8px; vertical-align: 1px; }
.tag.gold { background: var(--gold-bg); color: var(--gold-strong); }
.tag.green { background: var(--green-bg); color: var(--green); }
.tag.red { background: var(--red-bg); color: var(--red); }
.tag.grey { background: #EFEFEA; color: var(--muted); }
.hl { background: var(--gold-bg); padding: 0 4px; border-radius: 3px; }
.ok { color: var(--green); font-weight: 700; }

/* 视频 */
video { display: block; width: 100%; border-radius: 6px; border: 1px solid var(--line); background: #0E1116; }
.cap { font-size: 12.5px; color: var(--muted); margin: 7px 2px 0; }
.cap .src { font-family: "IBM Plex Mono", monospace; font-size: 11px; }

/* 博主档案 */
.builder { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 20px 22px; margin-bottom: 18px; }
.builder .head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 2px; }
.builder .head h3 { margin: 0; font-size: 17px; font-family: "Noto Serif SC", serif; }
.builder .meta { font-size: 12.5px; color: var(--muted); }
.builder .cols { display: grid; grid-template-columns: minmax(280px, 380px) 1fr; gap: 22px; margin-top: 12px; }
.builder .why { font-size: 14px; margin: 6px 0 0; }
.flow { margin: 0; padding: 0; list-style: none; counter-reset: step; }
.flow li { position: relative; padding: 5px 0 5px 34px; font-size: 14px; counter-increment: step; border-bottom: 1px dashed var(--line); }
.flow li:last-child { border-bottom: 0; }
.flow li::before { content: counter(step); position: absolute; left: 2px; top: 7px; width: 21px; height: 21px; border-radius: 50%; background: var(--gold-bg); color: var(--gold-strong); font-family: "IBM Plex Mono", monospace; font-size: 11.5px; display: flex; align-items: center; justify-content: center; }
.flow li b { font-weight: 700; }
.flow li .note { color: var(--muted); }
.flowtitle { font-size: 12px; letter-spacing: .1em; color: var(--gold); font-weight: 700; margin: 0 0 4px; }
.builder .lnk { margin-top: 10px; font-size: 13px; display: flex; gap: 16px; flex-wrap: wrap; }
.grouphead { font-family: "Noto Serif SC", serif; font-size: 18px; font-weight: 700; margin: 34px 0 14px; padding-left: 10px; border-left: 4px solid var(--gold); }

/* 步骤卡（实施路线） */
.step { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 18px 22px; margin-bottom: 16px; }
.step .shead { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.step .sno { font-family: "IBM Plex Mono", monospace; color: var(--gold); font-size: 14px; font-weight: 700; }
.step h3 { margin: 0; font-size: 17px; font-family: "Noto Serif SC", serif; }
.step .stime { margin-left: auto; font-size: 12.5px; color: var(--muted); font-family: "IBM Plex Mono", monospace; }
.step .body { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 28px; margin-top: 8px; }
.step .blk b { display: block; font-size: 12px; letter-spacing: .08em; color: var(--gold); margin-bottom: 2px; }
.step .blk { font-size: 14px; }
.step ul { margin: 0; padding-left: 1.2em; }
.step li { margin-bottom: 4px; }
.checkline { background: var(--green-bg); color: var(--green); border-radius: 4px; padding: 5px 12px; display: inline-block; font-size: 13.5px; margin-top: 10px; }
.checkline::before { content: "✓ 通过标准 · "; font-weight: 700; }

/* 风险表 */
.risk { display: grid; grid-template-columns: 1fr 1fr; background: var(--card); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; margin-bottom: 10px; }
.risk > div { padding: 11px 16px; font-size: 14px; }
.risk .r { background: var(--red-bg); color: var(--red); }
.risk .a { color: var(--muted); }
.risk .a b { color: var(--ink); }

/* 首页页头（蓝图网格 + 整机渲染） */
header.page.heroed {
  background:
    linear-gradient(rgba(154,111,11,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154,111,11,.055) 1px, transparent 1px),
    var(--card);
  background-size: 30px 30px;
}
.herocols { display: grid; grid-template-columns: 1fr 310px; gap: 34px; align-items: center; }
.herocols .duckimg { width: 100%; max-width: 310px; filter: drop-shadow(0 14px 26px rgba(28,36,46,.20)); }
@media (max-width: 760px) { .herocols { grid-template-columns: 1fr; } .herocols .duckimg { max-width: 220px; margin: 0 auto; } }

/* 图版（工程图版式的图片展示） */
.plate { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px 16px 10px; margin: 0 0 18px; }
.plate img { width: 100%; border: 0; border-radius: 4px; display: block; }
.platecap { display: flex; gap: 12px; align-items: baseline; border-top: 1px solid var(--line); margin-top: 12px; padding-top: 9px; font-size: 13px; color: var(--muted); }
.platecap .pno { font-family: "IBM Plex Mono", monospace; font-size: 11px; letter-spacing: .14em; color: var(--gold); font-weight: 700; white-space: nowrap; }
.platerow { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.photorow { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.photorow img { width: 100%; border-radius: 4px; border: 1px solid var(--line); display: block; }
@media (max-width: 700px) { .platerow { grid-template-columns: 1fr; } }

/* 36 零件网格 */
.partsgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: 7px; }
.partsgrid figure { margin: 0; background: #FBFAF4; border: 1px solid var(--line); border-radius: 5px; padding: 3px 3px 1px; }
.partsgrid img { width: 100%; display: block; }
.partsgrid figcaption { font-family: "IBM Plex Mono", monospace; font-size: 8.5px; color: var(--muted); text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding: 0 2px 2px; }

footer.site { margin-top: 64px; border-top: 1px solid var(--line-strong); background: var(--card); padding: 20px 0 34px; font-size: 13px; color: var(--muted); }
footer.site .mono { font-size: 11.5px; }

@media (max-width: 700px) {
  .builder .cols, .step .body, .risk { grid-template-columns: 1fr; }
  nav.site .brand small { display: none; }
}
@media print {
  nav.site, video { display: none; }
}