/* ==========================================================================
   project.css — 项目页（列表态 + 详情态）
   与记录页、想法页、履历页同属「内容页」家族。
   ========================================================================== */
:root {
  --paper: #fbfaf7;
  --paper-2: #f4f2ec;
  --ink: #14161a;
  --ink2: #565d66;
  --ink3: #8d939a;
  --rule: #e3dfd5;
  --rule-2: #cdc7ba;
  --accent: #0f766e;
  --accent-soft: #e9f4f2;
  --k-do: #1d4ed8;
  --k-xue: #0f766e;
  --k-xiang: #a16207;
  --k-da: #6d28d9;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Songti SC",
    "Noto Serif SC", serif;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "Cascadia Code", Consolas, monospace;
  --wrap: 1020px;
  --nav-h: 56px;
}

*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { margin: 0; line-height: 1.3; font-weight: 600; letter-spacing: -0.012em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 clamp(20px, 4vw, 44px); }
.mono { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink3); }
.tag { font-family: var(--mono); font-size: 0.6rem; color: var(--ink3); border: 1px solid var(--rule); border-radius: 5px; padding: 1px 6px; }
[hidden] { display: none !important; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}
.topbar__inner { display: flex; align-items: center; gap: 18px; width: 100%; }
.brand { display: inline-flex; align-items: center; gap: 9px; flex: none; }
.brand__mark {
  width: 24px; height: 24px; border-radius: 8px; display: grid; place-items: center;
  font-family: var(--serif); font-size: 0.82rem; font-weight: 700;
  color: var(--paper); background: var(--accent);
}
.brand__name { font-weight: 600; letter-spacing: -0.01em; }
.nav { display: flex; gap: 2px; margin-left: auto; }
.nav a {
  padding: 6px 12px; border-radius: 999px; font-size: 0.9rem; color: var(--ink2);
  transition: color 0.2s ease, background 0.2s ease;
}
.nav a:hover { color: var(--ink); background: var(--paper-2); }
.nav a.is-active { color: var(--ink); font-weight: 500; background: var(--paper-2); }
.chip {
  display: inline-flex; align-items: center; height: 32px; padding: 0 14px;
  border: 1px solid var(--rule-2); border-radius: 999px;
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em; color: var(--ink2);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.chip:hover { color: var(--ink); border-color: var(--ink3); background: #fff; }

/* ---------- 列表态页头 ---------- */
.page-head { padding: clamp(36px, 6vw, 62px) 0 26px; border-bottom: 3px double var(--ink); }
.kicker { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); }
.page-head__title { font-family: var(--serif); font-size: clamp(2.4rem, 6.4vw, 3.6rem); font-weight: 500; letter-spacing: -0.03em; margin: 12px 0 14px; }
.page-head__lede { max-width: 62ch; color: var(--ink2); font-size: 1rem; }
.page-head__lede strong { color: var(--ink); font-weight: 600; }

/* ---------- 项目卡片（列表态） ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; padding: clamp(30px, 4vw, 46px) 0 0; }
.card {
  display: block;
  border: 1px solid var(--rule-2);
  border-top: 3px solid var(--ink);
  background: #fff;
  padding: 22px 24px;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 22px 48px -32px rgba(20, 22, 26, 0.6); border-top-color: var(--accent); }
.card__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card__role { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.card__period { font-family: var(--mono); font-size: 0.64rem; color: var(--ink3); }
.card__title { display: block; font-family: var(--serif); font-size: 1.2rem; margin: 11px 0 8px; letter-spacing: -0.012em; }
.card__summary { display: block; color: var(--ink2); font-size: 0.92rem; }
.card__metrics { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 16px; }
.cmetric { font-size: 0.78rem; color: var(--ink3); }
.cmetric b { display: block; font-family: var(--serif); font-size: 1.32rem; color: var(--ink); line-height: 1.2; }
.card__go { display: block; margin-top: 16px; font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.08em; color: var(--ink3); }
.card:hover .card__go { color: var(--accent); }

/* ---------- 详情态：面包屑 ---------- */
.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  color: var(--ink3);
}
.crumbs a { color: var(--accent); }
.crumbs a:hover { text-decoration: underline; }

/* ---------- 详情态：页头 ---------- */
.phead { padding: clamp(20px, 3vw, 32px) 0 24px; border-bottom: 3px double var(--ink); }
.phead__title {
  font-family: var(--serif);
  font-size: clamp(2rem, 5.4vw, 3.1rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin: 12px 0 12px;
}
.phead__meta { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.06em; color: var(--ink3); }
.phead__dot { margin: 0 6px; }
.phead__lead { margin-top: 14px; max-width: 64ch; color: var(--ink2); font-size: 1.04rem; }
.phead__tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 16px; }
.phead__actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; align-items: center; }
.phead__nolink { font-family: var(--mono); font-size: 0.64rem; color: var(--ink3); }
.btn {
  display: inline-flex; align-items: center; height: 42px; padding: 0 18px;
  border: 1px solid var(--rule-2); border-radius: 999px; font-size: 0.9rem;
  background: #fff; transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-2px); border-color: var(--ink3); box-shadow: 0 12px 26px -18px rgba(20, 22, 26, 0.5); }
.btn--solid { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- 详情态：区块 ---------- */
.pblock { padding: clamp(28px, 4vw, 42px) 0; border-bottom: 1px solid var(--rule); }
.pblock:last-of-type { border-bottom: 0; }
.pblock__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--serif);
  font-size: 1.3rem;
  margin-bottom: 16px;
}
.pblock__title .mono { color: var(--accent); }
.pblock__text { max-width: 66ch; color: var(--ink2); font-size: 1.02rem; }
.pblock__hint { margin-bottom: 16px; color: var(--ink3); font-size: 0.88rem; }
.pblock--insight { background: var(--accent-soft); margin-inline: calc(clamp(20px, 4vw, 44px) * -0.5); padding-inline: calc(clamp(20px, 4vw, 44px) * 0.5); border-radius: 4px; }

.plist { display: grid; gap: 10px; max-width: 66ch; }
.plist li { position: relative; padding-left: 20px; color: var(--ink2); font-size: 0.98rem; }
.plist li::before { content: ""; position: absolute; left: 2px; top: 0.75em; width: 8px; height: 1px; background: var(--accent); }

.pmetrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.pmetric { background: var(--paper); padding: 18px 20px; }
.pmetric__v { display: block; font-family: var(--serif); font-size: 1.9rem; line-height: 1.05; letter-spacing: -0.02em; color: var(--ink); }
.pmetric__k { display: block; margin-top: 8px; font-size: 0.8rem; color: var(--ink3); }
.pactions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 18px; }
.pactions__label { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink3); }
.pactions__none { color: var(--ink3); font-size: 0.88rem; }
.pactions a { color: var(--accent); border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); font-size: 0.92rem; }
.pactions a:hover { border-bottom-color: var(--accent); }

.pinsight { max-width: 60ch; font-family: var(--serif); font-size: 1.24rem; line-height: 1.6; letter-spacing: -0.01em; }

/* ---------- 详情态：相关成长记录 ---------- */
.precords { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.prec {
  display: block;
  border: 1px solid var(--rule-2);
  border-left: 2px solid var(--k, var(--accent));
  background: #fff;
  padding: 16px 18px;
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.22s ease;
}
.prec:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -28px rgba(20, 22, 26, 0.55); }
.prec__meta { display: flex; align-items: center; gap: 9px; font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.08em; color: var(--ink3); }
.prec__date { letter-spacing: 0.06em; }
.prec__kind { color: var(--k); border: 1px solid color-mix(in srgb, var(--k) 45%, transparent); border-radius: 999px; padding: 1px 8px; }
.prec__title { display: block; font-family: var(--serif); font-size: 1.05rem; margin: 8px 0 6px; }
.prec__text { display: block; color: var(--ink2); font-size: 0.89rem; }

/* ---------- 详情态：上一个 / 下一个 ---------- */
.pnav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: clamp(30px, 4vw, 44px); }
.pnav__item {
  display: block;
  border: 1px solid var(--rule-2);
  background: #fff;
  padding: 16px 18px;
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.22s ease, box-shadow 0.22s ease;
}
.pnav__item:hover { transform: translateY(-3px); border-color: var(--ink3); box-shadow: 0 18px 40px -30px rgba(20, 22, 26, 0.5); }
.pnav__item--next { text-align: right; }
.pnav__k { display: block; }
.pnav__t { display: block; font-family: var(--serif); font-size: 1.02rem; margin-top: 6px; }

/* ---------- 找不到 ---------- */
.notfound { margin-top: 30px; padding: 26px 28px; border: 1px solid var(--rule-2); background: #fff; }
.notfound__title { font-family: var(--serif); font-size: 1.35rem; }
.notfound__text { margin-top: 10px; color: var(--ink2); font-size: 0.95rem; }
.notfound__text code { font-family: var(--mono); font-size: 0.85em; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 5px; padding: 1px 6px; }

/* ---------- 页脚 ---------- */
.footer { margin-top: 40px; padding: 24px 0 52px; border-top: 1px solid var(--rule); }
.footer__inner { display: flex; justify-content: space-between; gap: 12px 22px; flex-wrap: wrap; font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink3); }
.footer__links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer__links a:hover { color: var(--accent); }

/* ---------- 滚动入场 ---------- */
.js .reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1); }
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .nav { display: none; }
  .pnav { grid-template-columns: 1fr; }
  .pnav__item--next { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- 打印 ---------- */
@media print {
  @page { margin: 16mm 14mm; }
  html, body { background: #fff; color: #000; font-size: 10.5pt; }
  .topbar, .footer, .pnav, .crumbs { display: none !important; }
  .pblock, .pmetric, .prec { break-inside: avoid; page-break-inside: avoid; }
  .pblock--insight { background: none; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
}