:root {
  color-scheme: light;
  --canvas: #f7f8f4;
  --surface: #fff;
  --ink: #182822;
  --muted: #54635a;
  --line: #dce4db;
  --green: #21634e;
  --green-dark: #174c3b;
  --green-light: #e9f3ea;
  --radius: 18px;
  font-family: "Instrument Sans", "PingFang SC", "Microsoft YaHei UI", "Noto Sans CJK SC", sans-serif;
  font-synthesis: none;
  background: var(--canvas);
  color: var(--ink);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-size: 15px; line-height: 1.7; }
h1, h2, h3, p { margin: 0; }
button, summary { cursor: pointer; }
button { font: inherit; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid #2d785b; outline-offset: 4px; }
[id] { scroll-margin-top: 100px; }
.page-width { width: min(1220px, calc(100% - 96px)); margin-inline: auto; }
.skip { position: fixed; top: 12px; left: 12px; z-index: 5; padding: 8px 14px; background: white; transform: translateY(-150%); }
.skip:focus { transform: none; }

.site-header { position: sticky; top: 0; z-index: 3; border-bottom: 1px solid var(--line); background: rgb(247 248 244 / 97%); }
.header-inner, .wordmark { display: flex; align-items: center; }
.header-inner { justify-content: space-between; min-height: 66px; }
.wordmark { gap: 10px; font-weight: 750; font-size: 18px; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; background: var(--green-dark); color: white; font-size: 15px; }
.wordmark-divider { width: 1px; height: 17px; margin-inline: 4px 2px; background: #cbd5cc; }
.wordmark-label { font-size: 13px; color: var(--muted); font-weight: 500; }
.version { border: 1px solid var(--line); padding: 4px 10px; border-radius: 99px; color: var(--muted); font-size: 12px; white-space: nowrap; }
.version span { margin-left: 4px; color: var(--green-dark); font-weight: 700; }

.hero { display: grid; grid-template-columns: 1fr 0.96fr; align-items: center; gap: clamp(28px, 6vw, 84px); padding: 66px 0 34px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 15px; color: var(--green); font-size: 13px; font-weight: 750; letter-spacing: .14em; }
.eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--green); }
h1 { font-size: clamp(37px, 4.8vw, 69px); font-weight: 780; line-height: 1.14; letter-spacing: -.04em; }
.hero-intro { max-width: 34em; margin-top: 23px; color: var(--muted); font-size: clamp(15px, 1.3vw, 17px); line-height: 1.85; }
.primary-link { display: inline-flex; align-items: center; gap: 23px; margin-top: 26px; padding: 10px 15px; border-radius: 9px; color: white; background: var(--green-dark); font-size: 14px; font-weight: 700; }
.primary-link:hover { background: var(--green); }
.primary-link span { font-size: 16px; }

.hero-visual {
  padding: 26px 28px 23px;
  min-width: 0;
  border-radius: 24px;
  color: #f0f7ef;
  background-color: #153b30;
  background-image: radial-gradient(ellipse at 80% 10%, #28614a 0%, transparent 66%), radial-gradient(#8abea044 1px, transparent 1px);
  background-size: auto, 21px 21px;
  box-shadow: 0 16px 36px -28px #163f2f9e;
}
.diagram-heading { display: flex; align-items: center; gap: 9px; margin-bottom: 22px; color: #d2e5d6; font-size: 13px; font-weight: 650; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #b9dfaa; box-shadow: 0 0 0 4px #b9dfaa24; }
.diagram-inputs, .diagram-outputs { display: grid; gap: 9px; }
.diagram-inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.diagram-node { display: flex; align-items: center; gap: 10px; min-width: 0; padding: 12px; border: 1px solid #b6e0c84d; border-radius: 11px; background: #183c30c9; }
.diagram-icon { display: grid; place-items: center; flex: 0 0 31px; height: 31px; border-radius: 7px; background: #a8d1aa; color: #153b30; font-size: 14px; font-weight: 750; }
.diagram-icon.outline { background: #d4e8d022; color: #d2ead0; }
.diagram-node strong, .diagram-core strong { display: block; font-size: 15px; }
.diagram-node small, .diagram-core small { display: block; color: #c6dfcd; font-size: 12px; }
.diagram-merge { position: relative; width: 50%; height: 25px; margin-inline: auto; }
.diagram-merge::before { position: absolute; top: 0; inset-inline: 0; height: 13px; border: 1px solid #97c4a9; border-top: 0; border-radius: 0 0 5px 5px; content: ""; }
.diagram-merge span, .diagram-stem { display: block; width: 1px; margin-inline: auto; background: #97c4a9; }
.diagram-merge span { position: absolute; top: 12px; bottom: 0; left: 50%; }
.diagram-core { padding: 11px 10px; border: 1px solid #bddeb6; border-radius: 10px; background: #ddedd9; color: #164334; text-align: center; }
.diagram-core small { color: #385d4a; }
.diagram-stem { height: 17px; }
.diagram-outputs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.diagram-outputs span { padding: 6px 3px; border: 1px solid #b6e0c84d; border-radius: 7px; background: #183c30c9; text-align: center; font-size: 13px; }
.diagram-caption { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 13px; margin-top: 15px; color: #d2e5d6; font-size: 12px; }

.summary-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.summary-strip div { padding: 20px clamp(16px, 2.2vw, 27px); }
.summary-strip div + div { border-left: 1px solid var(--line); }
.summary-strip strong { display: block; margin-bottom: 5px; color: var(--green-dark); font-size: 15px; }
.summary-strip p { color: var(--muted); font-size: 13px; }

.document-layout { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 34px; align-items: start; margin-top: 53px; }
.contents { position: sticky; top: 96px; }
.contents p { margin: 1px 0 10px 13px; color: var(--muted); font-size: 12px; font-weight: 700; }
.contents a { display: block; padding: 7px 12px; border-radius: 7px; color: var(--muted); font-size: 13px; }
.contents a:hover, .contents a[aria-current] { color: var(--green-dark); background: var(--green-light); }
.contents a[aria-current] { font-weight: 750; box-shadow: inset 2px 0 var(--green); }
.document-body { min-width: 0; }
.document-section + .document-section { margin-top: 58px; padding-top: 40px; border-top: 1px solid var(--line); }
h2 { font-size: clamp(24px, 2.7vw, 34px); line-height: 1.35; letter-spacing: -.025em; }
h3 { font-size: 18px; line-height: 1.45; }
.section-intro { max-width: 54em; margin: 10px 0 21px; color: var(--muted); }

.capability-picker { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; margin-bottom: 13px; }
.capability-picker button, .scenario-controls button { border: 1px solid var(--line); background: var(--surface); color: var(--ink); }
.capability-picker button { min-height: 77px; padding: 10px 11px; border-radius: 11px; text-align: left; }
.capability-picker strong, .capability-picker span { display: block; }
.capability-picker strong { font-size: 14px; }
.capability-picker span { margin-top: 3px; color: var(--muted); font-size: 12px; }
.capability-picker button:hover, .scenario-controls button:hover { border-color: #8ba99b; }
.capability-picker button[aria-pressed="true"], .scenario-controls button[aria-pressed="true"] { border-color: #79a48e; background: var(--green-light); color: var(--green-dark); }
.capability-panel, .scenario { padding: clamp(16px, 2.8vw, 27px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.capability-heading p { margin: 5px 0 16px; color: var(--muted); }
.accordion details { border-top: 1px solid var(--line); }
.accordion details:last-child { border-bottom: 1px solid var(--line); }
.accordion summary { display: flex; align-items: center; gap: 10px; padding: 12px 0; font-size: 14px; font-weight: 700; list-style: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: "+"; margin-left: auto; color: var(--green); font-size: 18px; line-height: 1; }
.accordion details[open] summary::after { content: "−"; }
.accordion summary:hover { color: var(--green); }
.detail-content { padding: 0 23px 13px 0; color: var(--muted); font-size: 14px; }
.detail-content p + p { margin-top: 8px; }
.detail-content ul { margin: 0; padding-left: 1.35em; }
.detail-content li + li { margin-top: 6px; }
.chip { display: inline-block; flex: none; padding: 2px 8px; border-radius: 5px; background: #edf0ec; color: #4a5b51; font-size: 11px; font-weight: 700; white-space: nowrap; }
.chip.positive { background: var(--green-light); color: var(--green-dark); }
.capability-notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 16px; }
.capability-notes > div, .note { padding: 13px 15px; border-radius: 9px; background: var(--canvas); }
.capability-notes strong, .note strong { font-size: 13px; color: var(--green-dark); }
.capability-notes p, .note p { margin-top: 3px; color: var(--muted); font-size: 13px; }
.text-link { display: inline-flex; gap: 6px; margin-top: 14px; color: var(--green-dark); font-size: 13px; font-weight: 750; }
.text-link:hover, .footer a:hover { text-decoration: underline; }

.flow, .roadmap { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.flow { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 13px; }
.flow li, .journey > div { position: relative; padding: 13px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.flow li:not(:last-child)::after { content: "→"; position: absolute; top: 50%; right: -12px; z-index: 1; width: 14px; transform: translateY(-50%); background: var(--canvas); color: var(--green); line-height: 1; text-align: center; }
.flow strong, .flow small, .comparison span, .comparison strong, .comparison small { display: block; }
.flow strong, .journey strong { color: var(--green-dark); font-size: 14px; }
.flow small { margin-top: 4px; color: var(--muted); font-size: 12px; }
.scenario-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.scenario-controls { display: flex; flex-wrap: wrap; gap: 7px; margin: 14px 0; }
.scenario-controls button { padding: 5px 10px; border-radius: 7px; font-size: 13px; font-weight: 650; }
.comparison { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: 10px; background: var(--canvas); }
.comparison > div { padding: 12px 14px; }
.comparison > div + div { border-left: 1px solid var(--line); }
.comparison span, .comparison small { color: var(--muted); font-size: 12px; }
.comparison strong { margin-block: 3px; font-size: clamp(20px, 3vw, 30px); line-height: 1.35; font-variant-numeric: tabular-nums; }
.scenario-result { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; margin-top: 11px; padding: 12px 14px; border-radius: 9px; background: #f5f1e6; color: #644e27; }
.scenario-result.is-match { background: var(--green-light); color: var(--green-dark); }
.scenario-result p, .scenario-checks { font-size: 13px; }
.scenario-result p { margin-top: 3px; }
.scenario-checks { display: flex; flex-wrap: wrap; gap: 5px 14px; font-weight: 700; }
.scenario-note { margin-top: 11px; color: var(--muted); font-size: 12px; }
.compact { margin-top: 16px; }
.compact summary { padding: 12px 1px; }

.journey { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; margin-bottom: 11px; }
.journey p, .foundation-grid p, .roadmap p { margin-top: 6px; color: var(--muted); font-size: 14px; }
.note { border: 1px solid var(--line); background: var(--green-light); }
.foundation-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.foundation-grid > div, .roadmap li { padding: 17px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.foundation-grid h3 { margin-top: 8px; }
.roadmap { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.roadmap li { border-top: 3px solid #89af99; }
.roadmap li > span { color: var(--green); font-size: 12px; font-weight: 700; }
.roadmap h3 { margin-top: 5px; }
.footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 5px 18px; margin-top: 57px; padding: 18px 0 25px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer a { color: var(--green-dark); font-weight: 750; }

@media (max-width: 1050px) {
  .page-width { width: calc(100% - 56px); }
  .document-layout { grid-template-columns: 153px minmax(0, 1fr); gap: 19px; }
  .hero { gap: 25px; }
  .hero-visual { padding-inline: 20px; }
  .diagram-node { padding-inline: 8px; gap: 7px; }
}

@media (max-width: 820px) {
  [id] { scroll-margin-top: 75px; }
  .document-layout { display: block; margin-top: 29px; }
  .contents { position: static; margin-bottom: 28px; }
  .contents nav { display: flex; flex-wrap: wrap; gap: 4px 7px; align-items: center; }
  .contents p { margin: 0 4px 0 0; }
  .contents a { padding: 5px 8px; }
  .hero { padding-top: 40px; }
  .diagram-node { align-items: flex-start; }
  .diagram-icon { display: none; }
  .summary-strip div { padding: 13px; }
}

@media (max-width: 640px) {
  .page-width { width: calc(100% - 32px); }
  .header-inner { min-height: 56px; }
  .hero { grid-template-columns: 1fr; gap: 24px; padding: 32px 0 19px; }
  .eyebrow { margin-bottom: 10px; }
  .hero-intro { margin-top: 14px; }
  .primary-link { margin-top: 15px; }
  .hero-visual { padding: 18px 15px 14px; }
  .diagram-heading { margin-bottom: 14px; }
  .diagram-icon { display: grid; }
  .summary-strip, .roadmap { grid-template-columns: 1fr; }
  .summary-strip div + div { border-top: 1px solid var(--line); border-left: 0; }
  .capability-picker { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .capability-picker button { min-height: 58px; }
  .flow, .journey { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow li:nth-child(2)::after { display: none; }
  .comparison > div { padding: 9px 7px; }
  .comparison span, .comparison small { font-size: 11px; }
  .document-section + .document-section { margin-top: 37px; padding-top: 28px; }
  .footer { margin-top: 35px; }
}

@media (max-width: 390px) {
  .capability-notes, .foundation-grid { grid-template-columns: 1fr; }
  .diagram-icon { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}