/* 第一讲技巧章：沿用纸色、深色、鼠尾草色与现有标题／Prompt 零件。 */
.ft { display: grid; gap: 26px; align-content: start; }
.ft-split { grid-template-columns: minmax(0, .98fr) minmax(0, 1.02fr); column-gap: clamp(28px, 4vw, 58px); align-items: start; }
.ft-copy, .ft-practice { display: grid; gap: 24px; align-content: start; min-width: 0; }
.ft .head .lede { max-width: 40em; }
.ft p, .ft dt, .ft dd, .ft small { overflow-wrap: anywhere; }
.ft h2 { font-size: 1.28rem; line-height: 1.45; }
.ft .prompt textarea { min-height: 7.5em; font-size: .92rem; line-height: 1.72; resize: vertical; }
.ft .prompt-label { flex-wrap: wrap; }
.ft-small { color: var(--muted); font-size: .78rem; line-height: 1.6; }
.ft-foot { border-top: 1px solid var(--line); padding-top: 14px; display: grid; gap: 5px; font-size: .84rem; line-height: 1.65; color: var(--muted); }
.ft-foot b { color: var(--text-2); font-weight: 600; }
.ft-rows { display: grid; }
.ft-rows > div { display: grid; grid-template-columns: minmax(92px, .28fr) minmax(0, 1fr); gap: 18px; padding: 15px 0; border-top: 1px solid var(--line); }
.ft-rows dt { font-size: .96rem; font-weight: 600; }
.ft-rows dd { font-size: .94rem; line-height: 1.75; color: var(--text-2); }
.ft-steps { counter-reset: ft-step; }
.ft-steps li { counter-increment: ft-step; position: relative; border-top: 1px solid var(--line); padding: 14px 0 14px 40px; }
.ft-steps li::before { content: counter(ft-step, decimal-leading-zero); position: absolute; left: 0; top: 19px; font: .78rem/1 var(--mono); color: var(--muted); }
.ft-steps b { font-size: 1rem; }
.ft-steps p { margin-top: 5px; font-size: .94rem; line-height: 1.7; color: var(--text-2); }
.ft-sheet { padding: 24px 28px; border-left: 3px solid var(--mark); background: rgba(18, 18, 20, .035); display: grid; gap: 12px; }
.ft-sheet > p:last-child { color: var(--text-2); font-size: .96rem; line-height: 1.75; }
.ft-links { display: flex; gap: 10px; flex-wrap: wrap; }
.ft-index-list li { display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; gap: 20px; align-items: center; padding: 20px 0; border-top: 1px solid var(--line); }
.ft-index-list li > span { color: var(--muted); font: .84rem/1 var(--mono); }
.ft-focus-map { display: grid; gap: 14px; }
.ft-focus-map p { padding: 20px 24px; border: 1px solid var(--line-2); font-size: 1.2rem; font-weight: 600; }
.ft-focus-map > span { justify-self: end; padding: 12px 24px; background: var(--mark); color: var(--ink); }
.ft-focus-map > b { text-align: center; font-size: .9rem; font-weight: 500; }
.ft-compare { display: grid; grid-template-columns: .7fr 1.3fr; border-block: 1px solid var(--line-2); }
.ft-compare > div { padding: 20px 20px 22px 0; }
.ft-compare > div + div { border-left: 1px solid var(--line); padding-left: 20px; }
.ft-compare span { font-size: .78rem; color: var(--muted); }
.ft-compare blockquote { font-size: 1.1rem; line-height: 1.75; margin-top: 12px; }
.ft-rule-map, .ft-impact { display: grid; gap: 11px; }
.ft-rule-map > div, .ft-impact > div { padding: 18px 22px; border: 1px solid var(--line-2); }
.ft-rule-map b, .ft-impact b { font-size: 1.08rem; }
.ft-rule-map p, .ft-impact p { color: var(--text-2); font-size: .92rem; margin-top: 6px; }
.ft-rule-map > span, .ft-impact > span { font-size: .82rem; text-align: center; color: var(--muted); }
.ft-arguments { display: grid; grid-template-columns: 1fr 1.1fr 1fr; border-block: 1px solid var(--line-2); }
.ft-arguments > div { padding: 20px 15px; }
.ft-arguments > div:first-child { padding-left: 0; }
.ft-arguments > div:last-child { padding-right: 0; }
.ft-arguments > div + div { border-left: 1px solid var(--line); }
.ft-arguments h2 { font-size: 1.08rem; }
.ft-arguments p { color: var(--text-2); font-size: .9rem; line-height: 1.8; margin-top: 8px; }
.ft-big-question { border-left: 4px solid var(--mark); padding-left: 22px; font-size: 1.45rem; line-height: 1.85; }
.ft-calendar { border-top: 1px solid var(--line-2); }
.ft-calendar > p { padding: 13px 0; }
.ft-calendar > p + p { display: grid; gap: 5px; border-top: 1px solid var(--line); }
.ft-calendar span { color: var(--text-2); font-size: .94rem; }
.ft-preview { border-top: 2px solid var(--mark); padding-top: 15px; display: grid; gap: 12px; font-size: .9rem; }
.ft-preview > p { display: flex; gap: 16px; flex-wrap: wrap; }
.ft-preview > p b { min-width: 70px; }
.ft-goal { gap: 20px; }
.ft-goal > div:first-child { display: grid; grid-template-columns: 1.4fr .6fr; gap: 40px; align-items: end; }
.ft-goal-cut { border-left: 3px solid var(--mark); padding-left: 20px; font-size: .96rem; color: var(--text-2); }
.ft-reviewers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line-2); }
.ft-reviewers > div { padding: 20px 28px 15px 0; display: grid; gap: 10px; }
.ft-reviewers > div + div { border-left: 1px solid var(--line); padding-left: 28px; }
.ft-reviewers p { color: var(--text-2); font-size: .96rem; }
.ft-reviewers small { color: var(--muted); font-size: .8rem; line-height: 1.65; }
.ft-reviewers b { font-size: .84rem; font-weight: 500; }
.ft-goal-flow { display: grid; grid-template-columns: 1.05fr 1fr 1fr; gap: 12px 24px; align-items: start; }
.ft-goal-flow > p { border-top: 2px solid var(--line-2); padding-top: 12px; display: grid; gap: 4px; }
.ft-goal-flow > p:first-child { grid-column: 1 / -1; border-color: var(--mark); grid-template-columns: .7fr 1.3fr; }
.ft-goal-flow > span { font-size: .88rem; align-self: center; }
.ft-goal-flow > p span { color: var(--text-2); font-size: .9rem; }
.ft-goal-prompt .prompt textarea { min-height: 27em; font-size: .88rem; }
.ft-goal-app { color: #121214; }
.ft-goal-window .fct-app { height: 650px; }
.ft-goal-window .fct-empty { display: none; }
.ft-goal-window .fct-thread { padding: 3px 0; gap: 8px; }
.ft-goal-window .fct-simulation, .ft-goal-window .fct-caption, .ft-goal-window .fct-filetray > span { color: var(--text-2); }
.ft-goal-state { padding: 26px; display: grid; gap: 18px; }
.ft-goal-window .ft-goal-state { padding: 5px 8px; gap: 9px; }
.ft-goal-window .ft-goal-state h2 { font-size: 1.03rem; }
.ft-goal-window .ft-goal-state > p:not(.ft-small) { font-size: .76rem; }
.ft-goal-window .ft-goal-state label { font-size: .73rem; gap: 4px; }
.ft-goal-window .ft-goal-state input, .ft-goal-window .ft-goal-state textarea { font-size: .74rem; padding: 6px 8px; }
.ft-goal-window .ft-goal-state .seg button { font-size: .71rem; padding: 0 8px; min-height: 28px; }
.ft-goal-window .ft-goal-rule { padding-top: 8px; }
.ft-goal-state > p:not(.ft-small) { font-size: .9rem; line-height: 1.7; color: #5e5b56; }
.ft-goal-state label { display: grid; gap: 7px; font-size: .82rem; font-weight: 600; }
.ft-goal-state input, .ft-goal-state textarea { padding: 10px 12px; min-width: 0; width: 100%; border: 1px solid #d6d4cf; border-radius: 7px; background: #fff; color: #121214; font-size: .85rem; font-weight: 400; line-height: 1.6; }
.ft-goal-state textarea { resize: vertical; }
.ft-goal-state .seg { border-radius: 12px; }
.ft-goal-state .seg button { font-size: .8rem; padding: 0 11px; }
.ft-goal-rule { border-top: 1px solid #d6d4cf; padding-top: 15px; }
.ft-goal-rule b { color: #121214; font-weight: 600; }
.ft-untried > .seg, .ft-index > .seg { justify-self: start; }
.ft-screen-sample { padding: 22px; display: grid; gap: 12px; color: var(--text); }
.ft-screen-sample p { font-size: .95rem; }
.ft-screen-sample span { font-size: .82rem; color: var(--muted); }
.ft-untried-body { display: grid; grid-template-columns: .85fr 1.15fr; gap: 38px; align-items: start; }
.ft-untried .ft-sheet { min-height: 240px; }
.ft-index-list li { padding: 12px 0; }
.ft-index-list li p { font-size: 1rem; }
.ft-index-list { max-width: 1050px; }
.t-ink .ft-foot, .t-ink .ft-rows > div, .t-ink .ft-steps li, .t-ink .ft-compare, .t-ink .ft-compare > div + div, .t-ink .ft-rule-map > div, .t-ink .ft-impact > div { border-color: var(--line-ink); }
.t-ink .ft-foot, .t-ink .ft-small, .t-ink .ft-rule-map > span, .t-ink .ft-impact > span, .t-ink .ft-steps li::before { color: var(--on-ink-muted); }
.t-ink .ft-foot b, .t-ink .ft-rows dd, .t-ink .ft-steps p, .t-ink .ft-rule-map p, .t-ink .ft-impact p, .t-ink .ft-sheet > p:last-child { color: var(--on-ink-2); }
.t-ink .ft-sheet { background: rgba(241, 239, 233, .035); }
@media (max-width: 1050px) {
  .ft-split { column-gap: 30px; }
  .ft-rows > div { grid-template-columns: 100px minmax(0, 1fr); gap: 12px; }
  .ft-arguments { grid-template-columns: 1fr; }
  .ft-arguments > div, .ft-arguments > div:first-child, .ft-arguments > div:last-child { padding: 12px 0; border-left: 0; }
  .ft-arguments > div + div { border-top: 1px solid var(--line); }
  .ft-arguments p br { display: none; }
  .ft-goal > div:first-child { grid-template-columns: 1fr; gap: 16px; }
}
@media (max-width: 760px) {
  .ft-split, .ft-untried-body { grid-template-columns: 1fr; gap: 28px; }
  .ft .head .t { line-height: 1.2; }
  .ft .prompt textarea { font-size: .94rem; }
  .ft-goal-prompt .prompt textarea { min-height: 28em; }
  .ft-index-list li { grid-template-columns: 24px minmax(0, 1fr) auto; gap: 8px; }
  .ft-index-list .btn { padding: 0 12px; min-height: 36px; font-size: .78rem; }
  .ft-compare { grid-template-columns: 1fr; }
  .ft-compare > div + div { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .ft-reviewers { grid-template-columns: 1fr; }
  .ft-reviewers > div, .ft-reviewers > div + div { border-left: 0; padding: 16px 0; }
  .ft-reviewers > div + div { border-top: 1px solid var(--line); }
  .ft-goal-flow { grid-template-columns: 1fr; }
  .ft-goal-flow > p:first-child { grid-template-columns: 1fr; }
  .ft-goal-state { padding: 20px; }
  .ft-untried .ft-sheet { min-height: auto; }
}
@media (prefers-reduced-motion: reduce) {
  .ft * { scroll-behavior: auto; }
}