/* 老板，AI一下 · 项目介绍页
   视觉沿用第 0 期片头片尾的纸拼贴：牛皮纸底、米白纸片、招牌红、灯箱黄、墨黑。
   只用系统字体，不依赖任何外部资源（服务器在国内）。 */
:root {
  --kraft: #c8a473;
  --kraft-dk: #a9854f;
  --paper: #f6f0e3;
  --paper-dk: #e9dfc9;
  --ink: #1c1915;
  --muted: #6b5a45;
  --red: #d23a2c;
  --yellow: #ffc52e;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --shadow: 0 1px 0 rgba(0,0,0,.06), 0 10px 24px -12px rgba(40,25,10,.45);
  --gutter: clamp(16px, 4vw, 48px);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font: 400 17px/1.75 var(--sans);
  background-color: var(--kraft);
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .35  0 0 0 0 .24  0 0 0 0 .12  0 0 0 .28 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"),
    radial-gradient(ellipse at 20% 0%, rgba(255,240,210,.35), transparent 60%);
}
img { max-width: 100%; height: auto; }
b { font-weight: 800; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--red); outline-offset: 3px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; z-index: 9; background: var(--paper); padding: 8px 14px; }

/* ───── 纸片 ───── */
.hero-sheet, .case, .how, .wall, .rules-of-game {
  background: var(--paper);
  box-shadow: var(--shadow);
  position: relative;
}

/* ───── 首屏 ───── */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(28px, 6vw, 72px) var(--gutter) 28px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(20px, 4vw, 56px);
  align-items: end;
}
.hero-sheet {
  padding: clamp(24px, 4vw, 52px);
  transform: rotate(-.6deg);
  clip-path: polygon(0 1.5%, 3% 0, 9% 1.2%, 16% .2%, 24% 1.4%, 33% .3%, 41% 1.1%, 50% 0, 58% 1.3%, 67% .2%, 75% 1.2%, 84% .1%, 92% 1.4%, 100% .4%, 100% 98.6%, 96% 100%, 88% 98.8%, 79% 99.8%, 70% 98.5%, 61% 99.7%, 52% 98.6%, 44% 100%, 35% 98.7%, 27% 99.8%, 18% 98.6%, 9% 99.7%, 0 98.4%);
}
.eyebrow { margin: 0 0 12px; font: 700 14px/1 var(--mono); letter-spacing: .12em; color: var(--muted); }
.hero-title { margin: 0 0 18px; line-height: 0; }
.hero-title .row { display: flex; align-items: center; flex-wrap: nowrap; }
.hero-title img { height: clamp(62px, 10.5vw, 150px); width: auto; margin-right: -.6vw; filter: drop-shadow(2px 4px 4px rgba(40,25,10,.3)); }
.hero-title img.comma { height: clamp(34px, 5.4vw, 78px); align-self: flex-end; }
.lede { font-size: clamp(18px, 2.1vw, 22px); margin: 0 0 6px; max-width: 34em; }
.lede.small { font-size: 16px; color: var(--muted); margin-top: 10px; }
.question {
  display: inline-block;
  margin: 6px 0 0;
  padding: 6px 16px 8px;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 900;
  background: var(--yellow);
  transform: rotate(-1.2deg);
  box-shadow: 3px 4px 0 var(--ink);
}
.hero-count {
  display: grid;
  justify-items: center;
  padding: 22px 26px 18px;
  background: var(--ink);
  color: var(--paper);
  transform: rotate(3deg);
  box-shadow: var(--shadow);
}
.count-no { font: 700 18px/1 var(--mono); color: var(--yellow); justify-self: start; }
.count-num { font: 900 clamp(64px, 9vw, 112px)/1 var(--mono); color: var(--yellow); letter-spacing: -.04em; }
.count-of { font: 700 22px/1 var(--mono); justify-self: end; }
.count-link { margin-top: 14px; font-size: 14px; color: var(--paper); text-underline-offset: 4px; }

main { max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); }

/* ───── 拼贴标题（site.js 把每个字拆成一块纸片） ───── */
.ransom { margin: 0 0 24px; font-size: clamp(28px, 4vw, 44px); font-weight: 900; line-height: 1.3; letter-spacing: .02em; }
.ransom .ch {
  display: inline-block;
  padding: 0 .12em;
  margin: 0 .03em .1em 0;
  background: var(--paper-dk);
  transform: rotate(var(--r, 0deg)) translateY(var(--y, 0));
  box-shadow: 1px 2px 0 rgba(28,25,21,.25);
}
.ransom .ch.k { background: var(--ink); color: var(--paper); }
.ransom .ch.r { background: var(--red); color: var(--paper); }
.ransom .ch.y { background: var(--yellow); }
.ransom .ch.sp { background: none; box-shadow: none; width: .3em; }

/* ───── 怎么做 ───── */
.how { margin: 40px 0; padding: clamp(24px, 4vw, 44px); transform: rotate(.3deg); }
.steps { list-style: none; counter-reset: s; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.steps li { counter-increment: s; position: relative; padding-top: 52px; font-size: 15px; line-height: 1.6; }
.steps li::before {
  content: counter(s);
  position: absolute; left: 0; top: 0;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  font: 900 20px/1 var(--mono);
  color: var(--red);
  border: 3px solid var(--red);
  border-radius: 50%;
  transform: rotate(-8deg);
}
.steps b { display: block; font-size: 17px; margin-bottom: 4px; }
.steps span { color: var(--muted); }

/* ───── 案例 ───── */
.cases > .ransom { margin-top: 56px; }
.case { margin: 0 0 40px; padding: clamp(22px, 4vw, 48px); }
.case:nth-of-type(odd) { transform: rotate(-.25deg); }
.case:nth-of-type(even) { transform: rotate(.25deg); }
.case-head { position: relative; padding-right: 140px; margin-bottom: 22px; }
.case-no { margin: 0 0 6px; font: 700 14px/1.4 var(--mono); color: var(--muted); letter-spacing: .04em; }
.case h3 { margin: 0; font-size: clamp(24px, 3.2vw, 36px); line-height: 1.3; font-weight: 900; }
.stamp {
  position: absolute; right: 0; top: 0;
  padding: 6px 14px;
  font-weight: 900; font-size: 18px; letter-spacing: .1em;
  border: 4px double currentColor;
  border-radius: 8px;
  transform: rotate(-10deg);
  mix-blend-mode: multiply;
}
.stamp-done { color: var(--red); }
.stamp-doing { color: #2f6b3a; }
.stamp-plan { color: #2c4f8a; }
.case-body { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(20px, 3.5vw, 44px); align-items: start; }
.case-body.single { display: block; }
.case-text p { margin: 0 0 14px; }
.case h4 { margin: 22px 0 10px; font-size: 18px; font-weight: 900; }
.pain { padding: 14px 18px; background: #fff8e2; border-left: 6px solid var(--yellow); }
.pain span { display: block; font: 700 13px/1.4 var(--mono); color: var(--muted); letter-spacing: .08em; margin-bottom: 2px; }
.findings, .rules { margin: 0; padding: 0; list-style: none; }
.findings li, .rules li { position: relative; padding-left: 22px; margin-bottom: 12px; }
.findings li::before, .rules li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 9px; height: 9px; background: var(--red); transform: rotate(45deg); }
.rules li b, .phases li b { display: block; }
.rules.plain li b { display: inline; }
.note { font-size: 14px; color: var(--muted); }

.case-fig { margin: 0; padding: 20px; background: #fffdf7; border: 1px solid var(--paper-dk); box-shadow: 4px 5px 0 rgba(28,25,21,.12); }
.fig-title { margin: 0 0 12px; font: 700 14px/1.4 var(--mono); letter-spacing: .06em; color: var(--muted); }
figcaption { margin-top: 14px; font-size: 13px; color: var(--muted); line-height: 1.6; }

.kpis { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.kpis div { padding: 10px 12px; background: var(--paper); }
.kpis b { display: block; font: 900 30px/1.1 var(--mono); letter-spacing: -.02em; }
.kpis span { font-size: 13px; color: var(--muted); }
.kpis div:nth-child(4) b { color: var(--red); }
.bars, .subs { list-style: none; margin: 0 0 18px; padding: 0; }
.bars li { display: grid; grid-template-columns: 44px 1fr 38px; align-items: center; gap: 8px; font: 600 13px/1 var(--mono); margin-bottom: 7px; }
.bars i { display: block; height: 14px; width: calc(var(--v) / 205 * 100%); min-width: 3px; background: var(--ink); }
.bars li:nth-child(n+4) i { background: var(--red); }
.bars em { font-style: normal; color: var(--muted); }
.subs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.subs li { padding: 8px 10px; background: var(--paper); font-size: 14px; }
.subs b { display: block; font: 900 22px/1.2 var(--mono); }
.subs .low { background: #ffe9e3; }
.subs .low b { color: var(--red); }

.flow-list { list-style: none; margin: 0; padding: 0; counter-reset: f; }
.flow-list li {
  counter-increment: f;
  position: relative;
  margin: 0 0 8px 0;
  padding: 8px 12px 8px 44px;
  background: var(--paper);
  font-weight: 700;
  font-size: 15px;
}
.flow-list li::before { content: counter(f); position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font: 900 15px/1 var(--mono); color: var(--red); }
.flow-list li.human { background: var(--yellow); }
.loop { margin: 12px 0 0; padding: 8px 12px; border: 2px dashed var(--kraft-dk); font-size: 14px; }

.arch { margin: 18px 0 26px; }
.arch svg { display: block; width: 100%; height: auto; color: var(--ink); }
.arch .swipe { display: none; margin: 0 0 8px; font-size: 13px; color: var(--muted); }
.arch .node rect { fill: var(--paper); stroke: var(--ink); stroke-width: 2.5; }
.arch .node.hot rect { fill: var(--yellow); }
.arch .node.brain rect { fill: var(--ink); }
.arch .node.brain text { fill: var(--paper); }
.arch text { font: 800 19px var(--sans); text-anchor: middle; fill: var(--ink); }
.arch text.sub { font-weight: 500; font-size: 15px; fill: var(--muted); }
.arch .node.brain text.sub { fill: #d8cdb6; }
.arch .wire line { stroke: var(--ink); stroke-width: 2.5; }
.arch text.lab { font: 700 14px var(--mono); fill: var(--muted); }
.plan-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 3.5vw, 44px); margin-top: 8px; }
.plan-block h4 { margin-top: 10px; }
.bom { width: 100%; border-collapse: collapse; font-size: 15px; }
.bom th, .bom td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--paper-dk); vertical-align: top; }
.bom th { font: 700 13px/1.4 var(--mono); color: var(--muted); }
.bom td:last-child, .bom th:last-child { text-align: right; white-space: nowrap; }
.bom td:nth-child(2), .bom th:nth-child(2) { white-space: nowrap; }
.bom tfoot td { border-bottom: 0; border-top: 3px solid var(--ink); font-size: 17px; padding-top: 10px; }
.bom tfoot b { color: var(--red); }
.phases { margin: 0; padding-left: 1.4em; }
.phases li { margin-bottom: 12px; }
.phases li::marker { font: 900 16px var(--mono); color: var(--red); }

/* 小红书图文轮播：像在手机里翻图 */
.xhs { margin: 28px 0 0; }
.xhs-strip {
  display: flex; gap: 14px;
  overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 6px 4px 14px;
  -webkit-overflow-scrolling: touch;
}
.xhs-strip img {
  flex: 0 0 auto;
  width: clamp(190px, 22vw, 260px); height: auto;
  scroll-snap-align: start;
  border-radius: 8px;
  box-shadow: 3px 5px 0 rgba(28,25,21,.18);
  background: var(--paper-dk);
}
.xhs figcaption { margin-top: 6px; }

/* ───── 100 张邮票墙（全页的记忆点） ───── */
.wall { margin: 48px 0 40px; padding: clamp(22px, 4vw, 48px); background: var(--paper-dk); transform: rotate(-.2deg); }
.wall-lede { margin: -10px 0 22px; color: var(--muted); }
.stamps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(20, 1fr); gap: clamp(4px, .7vw, 9px); }
.stamps li {
  aspect-ratio: 4 / 5;
  position: relative;
  background: var(--paper);
  /* 齿孔边 */
  -webkit-mask: radial-gradient(circle at 50% 50%, transparent 3.2px, #000 3.6px) 0 0 / 10px 10px round, linear-gradient(#000 0 0) 5px 5px / calc(100% - 10px) calc(100% - 10px) no-repeat;
  -webkit-mask-composite: source-over;
  mask: radial-gradient(circle at 50% 50%, transparent 3.2px, #000 3.6px) 0 0 / 10px 10px round, linear-gradient(#000 0 0) 5px 5px / calc(100% - 10px) calc(100% - 10px) no-repeat;
  display: grid;
  place-items: center;
  font: 700 clamp(8px, .8vw, 11px)/1 var(--mono);
  color: #b7a585;
}
.stamps li.empty::after { content: ""; position: absolute; inset: 7px; border: 1.5px dashed #d2c3a5; }
.stamps li.done { background: #fffdf7; color: var(--ink); grid-column: span 2; grid-row: span 2; aspect-ratio: auto; }
.stamps li.done a { display: grid; place-items: center; align-content: center; gap: 2px; width: 100%; height: 100%; text-decoration: none; padding: 8px 4px; }
.stamps li.done svg { width: 58%; height: auto; }
.stamps li.done span { font: 900 clamp(10px, 1.2vw, 14px)/1 var(--mono); color: var(--red); }
.stamps li.done em { font-style: normal; font-size: clamp(9px, 1vw, 12px); font-weight: 700; line-height: 1.2; text-align: center; }
/* 邮戳：完成的盖红圈，方案阶段的盖蓝圈 */
.stamps li.done::after {
  content: "";
  position: absolute; right: -6%; top: -4%;
  width: 62%; aspect-ratio: 1;
  border: 2.5px solid var(--red);
  border-radius: 50%;
  opacity: .55;
  transform: rotate(-14deg);
  pointer-events: none;
}
.stamps li.done.plan::after { border-color: #2c4f8a; }
.stamps li.done a:hover { background: #fff3cf; }

/* ───── 规矩 ───── */
.rules-of-game { margin: 0 0 48px; padding: clamp(22px, 4vw, 44px); transform: rotate(.25deg); }
.pledges { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px 24px; }
.pledges li { border-top: 3px solid var(--ink); padding-top: 10px; }
.pledges b { display: block; font-size: 19px; }

/* ───── 页脚 ───── */
.foot { max-width: 1200px; margin: 0 auto; padding: 8px var(--gutter) 56px; color: var(--ink); }
.foot p { margin: 0 0 6px; max-width: 46em; }
.foot-title { font-size: 22px; font-weight: 900; }
.foot-small { font-size: 14px; color: #4a3b28; }

/* ───── 窄屏 ───── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-count { justify-self: start; grid-template-columns: auto auto auto; align-items: baseline; gap: 8px; transform: rotate(-2deg); }
  .count-no, .count-of { justify-self: auto; }
  .count-link { grid-column: 1 / -1; margin-top: 6px; }
  .steps { grid-template-columns: 1fr; gap: 12px; }
  .steps li { padding: 0 0 0 54px; min-height: 40px; }
  .case-body, .plan-grid { grid-template-columns: 1fr; }
  .stamps { grid-template-columns: repeat(10, 1fr); }
  .pledges { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .case-head { padding-right: 0; }
  .stamp { position: static; display: inline-block; margin-top: 12px; transform: rotate(-4deg); }
  .hero-sheet, .case, .how, .wall, .rules-of-game { transform: none; }
  .bom { font-size: 14px; }
  .pledges { grid-template-columns: 1fr; }
  .stamps li.empty { font-size: 0; }
  .stamps li.empty::after { inset: 5px; }
  .arch { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .arch svg { min-width: 760px; }
  .arch .swipe { display: block; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}