/* FDE 交付流程页：字号、行高、圆角与颜色全部引用站点基座 */

/* ── 首屏 ── */
.fde-hero { position: relative; isolation: isolate; overflow: hidden; padding: clamp(52px,6vw,88px) 0 62px; color: var(--site-ink); background: var(--site-bg); }
.fde-hero::before { position: absolute; z-index: -1; inset: 0; content: ""; pointer-events: none; background: radial-gradient(circle at 18% 12%, rgba(130,136,145,.12), transparent 25rem), radial-gradient(circle at 82% 80%, var(--site-primary-tint), transparent 23rem); }
.fde-hero-grid { display: grid; grid-template-columns: minmax(0,1fr); justify-items: center; gap: 0; }
.fde-hero-copy { position: relative; z-index: 2; width: 100%; max-width: 980px; margin-inline: auto; text-align: center; }
.fde-hero h1 { max-width: 1000px; margin: 0 auto 18px; font-size: var(--site-h1); line-height: var(--site-leading-display); letter-spacing: var(--site-tracking-display); font-weight: 600; color: var(--site-ink); text-align: center; }
.fde-hero h1 em { color: var(--site-violet); font-style: normal; }
.fde-lead { max-width: 700px; margin: 0 auto; color: var(--site-ink); font-size: var(--site-lead); line-height: var(--site-leading-prose); }
.fde-support { max-width: var(--site-measure); margin: 16px auto 0; color: var(--site-muted); font-size: var(--site-body); line-height: var(--site-leading-prose); }
.fde-hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.fde-hero-art { position: relative; width: min(100%, 1040px); height: clamp(280px,32vw,420px); margin: 30px auto 0; overflow: hidden; border: 1px solid var(--site-line); border-radius: var(--site-image-radius); background: var(--site-tint-gray); box-shadow: var(--site-shadow-float); }
.fde-hero-art img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 74% center; border-radius: inherit; }
.fde-hero-art::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(90deg, rgba(255,255,255,.14), transparent 38%); pointer-events: none; }
.fde-proof-line { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 22px; margin-top: 26px; color: var(--site-muted); font-size: var(--site-small); }
.fde-proof-line span { display: inline-flex; align-items: center; gap: 8px; }
.fde-proof-line i { width: 7px; height: 7px; border-radius: 50%; background: var(--site-blue); }

/* ── 章节骨架 ── */
.fde-section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 34px; }
.fde-section-head h2 { margin: 0; color: var(--site-ink); font-size: var(--site-h2); line-height: var(--site-leading-heading); letter-spacing: var(--site-tracking-heading); font-weight: 600; }
.fde-section-head p { max-width: 420px; margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-section-label { display: flex; align-items: center; gap: 12px; margin: 38px 0 18px; color: var(--site-ink); font-size: var(--site-small); font-weight: 700; letter-spacing: .04em; }
.fde-section-label::after { flex: 1; height: 1px; background: var(--site-line); content: ""; }
.fde-subhead { margin: 64px 0 22px; }

/* ── 七阶段横条 ── */
.fde-flow-section { padding: 78px 0 88px; background: #fff; }
.fde-flow-wrap { padding: 26px 22px 22px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: var(--site-surface-soft); box-shadow: var(--site-shadow-soft); }
.fde-flow { display: grid; grid-template-columns: repeat(7,minmax(0,1fr)); align-items: start; gap: 0; margin: 0; padding: 0; list-style: none; }
.fde-flow li { position: relative; min-width: 0; }
.fde-flow li:not(:last-child)::after { content: ""; position: absolute; top: 28px; left: calc(50% + 31px); right: calc(-50% + 31px); height: 2px; background: linear-gradient(90deg, var(--site-line-strong), var(--site-tint-gray)); }
.fde-flow a { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 9px; min-height: 138px; padding: 0 5px; text-align: center; }
.fde-flow-icon { display: grid; width: 58px; height: 58px; place-items: center; border: 1px solid rgba(117,122,129,.28); border-radius: var(--site-radius); background: var(--site-chrome); color: var(--site-primary); box-shadow: var(--site-shadow-soft); transition: transform var(--site-fast) var(--site-ease), border-color var(--site-fast) var(--site-ease), color var(--site-fast) var(--site-ease); }
.fde-flow a:hover .fde-flow-icon { transform: translateY(-2px); border-color: var(--site-primary); }
.fde-flow a:focus-visible { border-radius: var(--site-radius-sm); }
.fde-flow-icon svg { width: 25px; height: 25px; }
.fde-flow .step-no { color: var(--site-blue); font-size: var(--site-micro); font-weight: 700; letter-spacing: .04em; font-variant-numeric: tabular-nums; }
.fde-flow strong { color: var(--site-ink); font-size: var(--site-small); font-weight: 600; line-height: var(--site-leading-tight); }
.flow-output { display: flex; justify-content: center; margin-top: 12px; padding-top: 16px; border-top: 1px solid var(--site-line); color: var(--site-blue); font-size: var(--site-small); font-weight: 700; text-align: center; }

/* ── 阶段详情 ── */
.fde-detail-section { padding: 88px 0; background: var(--site-ice); }
.fde-stage-list { display: grid; gap: 15px; }
.fde-stage { display: grid; grid-template-columns: 98px minmax(0,1fr); gap: 23px; padding: 26px 28px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: #fff; box-shadow: var(--site-shadow-soft); scroll-margin-top: 105px; }
.fde-stage-index { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.fde-stage-index b { color: var(--site-blue); font-size: var(--site-figure); line-height: 1; letter-spacing: var(--site-tracking-display); font-variant-numeric: tabular-nums; }
.fde-stage-index span { color: var(--site-faint); font-size: var(--site-micro); font-weight: 700; letter-spacing: var(--site-tracking-label); }
.fde-stage-main h3 { margin: 0 0 8px; color: var(--site-ink); font-size: var(--site-h3); line-height: var(--site-leading-heading); letter-spacing: var(--site-tracking-heading); font-weight: 600; }
.fde-stage-main > p { max-width: var(--site-measure); margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-stage-fields { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 0; margin: 20px 0 0; border-top: 1px solid var(--site-line); }
.fde-stage-fields div { padding: 15px 14px 0 0; }
.fde-stage-fields dt { margin-bottom: 6px; color: var(--site-blue); font-size: var(--site-micro); font-weight: 700; }
.fde-stage-fields dd { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-body); }
.fde-stage-fields div:nth-child(4), .fde-stage-fields div:nth-child(5) { padding-left: 10px; border-left: 1px solid var(--site-line); background: var(--site-surface-soft); }
.fde-stage-fields div:nth-child(4) dd, .fde-stage-fields div:nth-child(5) dd { color: var(--site-ink); font-weight: 600; }

/* ── 验证回路 ── */
.fde-loop { margin: 28px 0; padding: 26px 28px; border: 1px solid var(--site-line-strong); border-radius: var(--site-radius); background: var(--site-ice); }
.fde-loop-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.fde-loop-icon { display: grid; width: 42px; height: 42px; flex: none; place-items: center; border-radius: var(--site-radius); background: var(--site-tint-lavender); color: var(--site-blue); }
.fde-loop-icon svg { width: 21px; height: 21px; }
.fde-loop h3 { margin: 0; color: var(--site-ink); font-size: var(--site-h3); font-weight: 600; line-height: var(--site-leading-heading); }
.fde-loop p { margin: 5px 0 0; color: var(--site-muted); font-size: var(--site-small); }
.fde-loop-track { display: grid; grid-template-columns: 1fr 38px 1fr 38px 1fr; align-items: center; gap: 8px; }
.fde-loop-step { padding: 14px 16px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: rgba(255,255,255,.8); color: var(--site-ink); font-size: var(--site-small); font-weight: 700; text-align: center; }
.fde-loop-arrow { color: var(--site-violet); font-size: var(--site-body); text-align: center; }
.fde-loop-return { grid-column: 1 / -1; margin-top: 8px; color: var(--site-violet); font-size: var(--site-micro); text-align: center; }

/* ── 成果与复制 ── */
.fde-outcomes { --fde-scale-gap: 14px; padding: 88px 0; background: #fff; }
.fde-outcome-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 14px; }
.fde-outcome { padding: 23px 21px 25px; border: 1px solid var(--site-line); border-top: 3px solid var(--site-blue); border-radius: 0 0 var(--site-radius) var(--site-radius); background: #fff; box-shadow: var(--site-shadow-soft); }
.fde-outcome:nth-child(4n + 1) { border-top-color: var(--site-primary); }
.fde-outcome:nth-child(4n + 2) { border-top-color: var(--site-violet); }
.fde-outcome:nth-child(4n + 3), .fde-outcome:nth-child(4n) { border-top-color: var(--site-line-strong); }
.fde-outcome-icon { width: 26px; height: 26px; margin-bottom: 16px; color: var(--site-blue); }
.fde-outcome:nth-child(4n + 2) .fde-outcome-icon { color: var(--site-violet); }
.fde-outcome:nth-child(4n + 3) .fde-outcome-icon, .fde-outcome:nth-child(4n) .fde-outcome-icon { color: var(--site-muted); }
.fde-outcome h3 { margin: 0 0 8px; color: var(--site-ink); font-size: var(--site-body); font-weight: 600; line-height: var(--site-leading-heading); }
.fde-outcome p { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-scale { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: var(--fde-scale-gap); margin: 0; padding: 0; list-style: none; align-items: stretch; }
.fde-scale-step { position: relative; display: flex; flex-direction: column; justify-content: center; padding: 25px 27px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: var(--site-tint-sky); }
.fde-scale-step:nth-child(1) { background: var(--site-ice); }
.fde-scale-step:nth-child(2) { background: var(--site-tint-gray); }
.fde-scale-step:nth-child(3) { background: var(--site-line-strong); }
.fde-scale-step small { color: var(--site-blue); font-size: var(--site-micro); font-weight: 700; letter-spacing: var(--site-tracking-label); }
.fde-scale-step h3 { margin: 8px 0; color: var(--site-ink); font-size: var(--site-body); font-weight: 600; }
.fde-scale-step p { margin: 0; color: var(--site-ink-soft); font-size: var(--site-small); line-height: var(--site-leading-body); }

/* ── 协作与清单 ── */
.fde-collaboration { padding: 88px 0; background: #fff; }
.fde-client-journey { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.fde-client-journey article, .fde-role-grid article, .fde-deliverables article { padding: 20px 0; border: 0; border-top: 1px solid var(--site-line); border-radius: 0; background: transparent; }
.fde-client-journey small, .fde-role-grid small { color: var(--site-blue); font-size: var(--site-micro); font-weight: 700; letter-spacing: var(--site-tracking-label); }
.fde-client-journey h3, .fde-role-grid h3, .fde-deliverables h3 { margin: 10px 0 8px; color: var(--site-ink); font-size: var(--site-body); font-weight: 600; line-height: var(--site-leading-heading); }
.fde-client-journey p, .fde-role-grid p, .fde-deliverables p { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-playbook-list { display: grid; gap: 13px; }
.fde-playbook-card { padding: 24px 0; border: 0; border-top: 1px solid var(--site-line); border-radius: 0; background: transparent; scroll-margin-top: 100px; }
.fde-playbook-title { display: flex; align-items: center; gap: 13px; margin-bottom: 16px; }
.fde-playbook-title b { display: grid; width: 38px; height: 38px; flex: none; place-items: center; border-radius: 50%; color: var(--site-blue); background: var(--site-tint-gray); font-size: var(--site-small); font-variant-numeric: tabular-nums; }
.fde-playbook-title h3 { margin: 0; color: var(--site-ink); font-size: var(--site-h3); font-weight: 600; letter-spacing: var(--site-tracking-heading); }
.fde-playbook-card dl { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; margin: 0; }
.fde-playbook-card dl > div { min-width: 0; padding: 12px 14px 0 0; border-top: 1px solid var(--site-line); background: transparent; }
.fde-playbook-card dt { margin-bottom: 6px; color: var(--site-blue); font-size: var(--site-micro); font-weight: 600; }
.fde-playbook-card dd { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-role-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; }
.fde-role-grid article { min-height: 172px; }
.fde-deliverables { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.fde-deliverables article { min-height: 196px; }
.fde-deliverables article > b { color: var(--site-blue); font-size: var(--site-micro); letter-spacing: .06em; font-variant-numeric: tabular-nums; }
.fde-deliverables h3 { margin-top: 11px; }

/* ── 场景目录与方法示例 ── */
.fde-scenario-directory { display: grid; grid-template-columns: minmax(220px,.7fr) minmax(0,1.3fr); gap: 25px; margin-top: 34px; padding: 25px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: var(--site-ice); }
.fde-scenario-directory h3 { margin: 0 0 8px; color: var(--site-ink); font-size: var(--site-h3); font-weight: 600; line-height: var(--site-leading-heading); }
.fde-scenario-directory p { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-scenario-directory ul { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; margin: 0; padding: 0; list-style: none; }
.fde-scenario-directory li { display: flex; align-items: center; min-height: 46px; padding: 10px 13px; border: 1px solid var(--site-line); border-radius: var(--site-radius-sm); color: var(--site-ink); background: #fff; font-size: var(--site-small); line-height: var(--site-leading-tight); }
.fde-ops-example { display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1.15fr); gap: 30px; align-items: center; margin-top: 68px; padding: clamp(23px,4vw,40px); border: 1px solid var(--site-line); border-radius: var(--site-radius); background: var(--site-surface-soft); }
.fde-example-label { display: inline-flex; padding: 6px 10px; border-radius: var(--site-radius-control); color: var(--site-muted); background: var(--site-tint-gray); font-size: var(--site-micro); font-weight: 700; letter-spacing: .06em; }
.fde-ops-example h2 { margin: 13px 0 10px; color: var(--site-ink); font-size: var(--site-h3); line-height: var(--site-leading-heading); letter-spacing: var(--site-tracking-heading); font-weight: 600; }
.fde-ops-example p { margin: 0; color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-example-flow { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 8px; margin: 0; padding: 0; list-style: none; counter-reset: example; }
.fde-example-flow li { position: relative; display: flex; min-height: 118px; flex-direction: column; justify-content: center; padding: 13px; border: 1px solid var(--site-line); border-radius: var(--site-radius); color: var(--site-ink); background: #fff; font-size: var(--site-small); font-weight: 700; line-height: var(--site-leading-tight); }
.fde-example-flow li::before { counter-increment: example; content: "0" counter(example); margin-bottom: 8px; color: var(--site-violet); font-size: var(--site-micro); font-variant-numeric: tabular-nums; }
.fde-example-flow li:not(:last-child)::after { content: "→"; position: absolute; z-index: 1; top: 50%; right: -11px; color: var(--site-violet); transform: translateY(-50%); }
.fde-support-loop { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; margin: 0; padding: 0; list-style: none; }
.fde-support-loop li { display: flex; min-height: 110px; align-items: flex-start; gap: 12px; padding: 18px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: #fff; }
.fde-support-loop b { color: var(--site-blue); font-size: var(--site-small); font-variant-numeric: tabular-nums; }
.fde-support-loop span { color: var(--site-muted); font-size: var(--site-small); line-height: var(--site-leading-prose); }
.fde-case-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.fde-flow a, .fde-case-links a { transition: color var(--site-fast) var(--site-ease), transform var(--site-fast) var(--site-ease); }
.fde-case-links a:hover { transform: translateY(-1px); }

@media (prefers-reduced-motion: reduce) {
  .fde-flow-icon, .fde-flow a, .fde-case-links a { transition: none; }
  .fde-flow a:hover .fde-flow-icon, .fde-case-links a:hover { transform: none; }
}
@media (max-width: 1040px) {
  .fde-flow { grid-template-columns: repeat(4,minmax(0,1fr)); row-gap: 20px; }
  .fde-flow li::after { display: none; }
  .fde-stage-fields { grid-template-columns: repeat(3,minmax(0,1fr)); row-gap: 12px; }
  .fde-outcome-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .fde-playbook-card dl { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .fde-role-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .fde-deliverables { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .fde-example-flow { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .fde-example-flow li:nth-child(3)::after { display: none; }
  .fde-support-loop { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 760px) {
  .fde-hero { padding: 44px 0 52px; }
  .fde-hero-art { height: 245px; margin-top: 24px; }
  .fde-hero-art img { object-position: 77% center; }
  .fde-section-head { align-items: flex-start; flex-direction: column; gap: 14px; }
  .fde-section-head p { max-width: var(--site-measure); }
  .fde-scenario-directory { grid-template-columns: 1fr; }
  .fde-ops-example { grid-template-columns: 1fr; gap: 22px; margin-top: 48px; padding: 23px 18px; }
}
@media (max-width: 560px) {
  .fde-collaboration { padding: 60px 0; }
  .fde-subhead { margin: 46px 0 20px; }
  .fde-client-journey, .fde-role-grid, .fde-deliverables, .fde-example-flow, .fde-support-loop, .fde-scenario-directory ul { grid-template-columns: 1fr; }
  .fde-playbook-card { padding: 20px 0; }
  .fde-playbook-card dl { grid-template-columns: 1fr; }
  .fde-role-grid article, .fde-deliverables article { min-height: 0; }
  .fde-example-flow li { min-height: 0; }
  .fde-example-flow li:not(:last-child)::after { top: auto; right: auto; bottom: -13px; left: 50%; display: block; transform: translateX(-50%) rotate(90deg); }
  .fde-flow-wrap { padding: 20px 16px; }
  .fde-flow { display: flex; flex-direction: column; align-items: stretch; }
  .fde-flow li { width: 100%; }
  .fde-flow a { min-height: 66px; display: grid; grid-template-columns: 46px 38px 1fr; gap: 8px; padding: 0 4px; text-align: left; }
  .fde-flow-icon { width: 38px; height: 38px; }
  .fde-flow-icon svg { width: 19px; height: 19px; }
  .fde-flow li:not(:last-child)::after { display: block; left: 22px; right: auto; top: 43px; bottom: -22px; width: 2px; height: 36px; background: linear-gradient(var(--site-line-strong), var(--site-tint-gray)); }
  .fde-flow .step-no { text-align: center; }
  .fde-flow strong { font-size: var(--site-small); }
  .fde-stage { grid-template-columns: 52px minmax(0,1fr); gap: 14px; padding: 20px 17px; }
  .fde-stage-index b { font-size: var(--site-h3); }
  .fde-stage-index span { font-size: var(--site-micro); writing-mode: vertical-rl; }
  .fde-stage-fields { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .fde-stage-fields div:nth-child(4), .fde-stage-fields div:nth-child(5) { grid-column: 1 / -1; padding: 11px 0 0; border-left: 0; border-top: 1px solid var(--site-line); background: transparent; }
  .fde-loop { padding: 21px 17px; }
  .fde-loop-track { grid-template-columns: 1fr; }
  .fde-loop-arrow { transform: rotate(90deg); }
  .fde-loop-return { grid-column: auto; }
  .fde-outcome-grid { grid-template-columns: 1fr; }
  .fde-outcomes { --fde-scale-gap: 12px; }
  .fde-scale { grid-template-columns: 1fr; gap: var(--fde-scale-gap); }
}