/* Isolated proposal section. Uses the site's existing product tokens. */
.why-cbdes {
  --why-bg: var(--color-bg, #0b0b0b);
  --why-text: var(--color-text, #f1f0ea);
  --why-muted: var(--color-text-muted, #a5a49f);
  --why-accent: var(--color-accent, #c9f34a);
  --why-line: var(--color-line, rgba(241, 240, 234, 0.16));
  color: var(--why-text);
  background: var(--why-bg);
  border-bottom: 1px solid var(--why-line);
  scroll-margin-top: 90px;
  font-family: var(
    --font-body,
    Arial,
    "Noto Sans CJK SC",
    "Microsoft YaHei",
    sans-serif
  );
}
.why-cbdes *,
.why-cbdes *::before,
.why-cbdes *::after {
  box-sizing: border-box;
}
.why-cbdes h2,
.why-cbdes h3,
.why-cbdes h4,
.why-cbdes p {
  margin: 0;
}
.why-cbdes button,
.why-cbdes a {
  font: inherit;
  color: inherit;
}
.why-cbdes a {
  text-decoration: none;
}
.why-cbdes button {
  cursor: pointer;
}
.why-cbdes [hidden] {
  display: none !important;
}
.why-cbdes button:focus-visible,
.why-cbdes a:focus-visible {
  outline: 2px solid var(--why-accent);
  outline-offset: 5px;
}
.why-shell {
  width: min(100%, 1440px);
  padding: 64px var(--gutter, 40px) 34px;
  margin: auto;
}
.why-intro {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: end;
  gap: 70px;
  margin-bottom: 32px;
}
.why-kicker {
  font: 12px/1.5 var(--font-mono, Consolas, monospace);
  letter-spacing: 0.13em;
  color: var(--why-accent);
  margin-bottom: 17px !important;
  display: flex;
  gap: 22px;
}
.why-kicker span {
  color: var(--why-muted);
}
.why-intro h2 {
  font-size: clamp(30px, 3.2vw, 46px);
  line-height: 1.22;
  letter-spacing: -0.035em;
  font-weight: 650;
}
.why-intro h2 span {
  display: block;
}
.why-lead {
  font-size: 15px;
  line-height: 1.9;
  color: var(--why-muted);
  max-width: 500px;
  padding-bottom: 3px;
}
.why-challenges {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.why-challenge {
  background: #111210;
  border: 1px solid var(--why-line);
  padding: 20px 24px 18px;
}
.why-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font: 11px/1.5 var(--font-mono, Consolas, monospace);
  color: var(--why-muted);
  letter-spacing: 0.045em;
  margin-bottom: 14px;
}
.why-card-meta span:first-child {
  color: var(--why-accent);
  font-size: 15px;
}
.why-challenge h3 {
  font-size: 23px;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  font-weight: 600;
}
.why-challenge p {
  color: var(--why-muted);
  font-size: 14px;
  line-height: 1.75;
  min-height: 49px;
}
.why-need {
  font-size: 12px;
  line-height: 1.6;
  border-top: 1px solid var(--why-line);
  margin-top: 17px;
  padding-top: 12px;
  color: #cecfca;
}
.why-need-label {
  display: block;
  color: var(--why-accent);
  font-size: 11px;
  margin-bottom: 5px;
}
.why-need strong {
  font-weight: 500;
}
.why-solution {
  margin-top: 26px;
  border: 1px solid #39412a;
  background: #12150f;
}
.why-equation-row {
  padding: 23px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  border-bottom: 1px solid #303728;
}
.why-small-label {
  font-size: 11px;
  line-height: 1.5;
  color: var(--why-accent);
  letter-spacing: 0.08em;
  margin-bottom: 6px !important;
}
.why-equation-row h3 {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 500;
}
.why-equation {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: clamp(24px, 3.2vw, 43px);
  line-height: 1.2;
  letter-spacing: -0.04em;
  white-space: nowrap;
}
.why-equation strong {
  font-weight: 650;
}
.why-equation span {
  color: #79846c;
  font-weight: 400;
}
.why-equation b {
  font-weight: 550;
  color: var(--why-accent);
}
.why-platforms {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.why-platform {
  padding: 24px 28px 22px;
  min-width: 0;
}
.why-platform + .why-platform {
  border-left: 1px solid #303728;
}
.why-platform-top {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 10px;
}
.why-product {
  font-size: 25px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.why-platform h4 {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  color: #e0e3d8;
}
.why-platform p {
  font-size: 14px;
  line-height: 1.8;
  color: #b6bcad;
  max-width: 560px;
}
.why-platform .why-product-expansion {
  font-size: 12px;
  margin-bottom: 10px;
}
.why-capabilities {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 17px;
  color: #d2e1b7;
  font-size: 12px;
  line-height: 1.5;
}
.why-capabilities span {
  border-bottom: 1px solid #39462b;
  padding-bottom: 4px;
}
.why-workflow {
  margin-top: 34px;
}
.why-flow-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}
.why-flow-heading h3 {
  font-size: 20px;
  line-height: 1.4;
  font-weight: 600;
}
.why-flow-heading > span {
  font-size: 12px;
  color: var(--why-muted);
}
.why-stages {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}
.why-stage {
  position: relative;
  display: grid;
  grid-template-columns: 26px 1fr;
  column-gap: 10px;
  row-gap: 4px;
  text-align: left;
  background: #121212;
  border: 1px solid var(--why-line);
  padding: 15px 17px;
  min-height: 84px;
  transition:
    background 150ms,
    border-color 150ms;
}
.why-stage:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -21px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: #85877f;
}
.why-stage:hover {
  border-color: #7b8664;
}
.why-stage[aria-pressed="true"] {
  background: #c9f34a;
  color: #12170a;
  border-color: #c9f34a;
}
.why-step-number {
  grid-row: 1/3;
  font: 12px/1.6 var(--font-mono, Consolas, monospace);
  padding-top: 3px;
  opacity: 0.7;
}
.why-step-name {
  font-size: 17px;
  line-height: 1.4;
  font-weight: 600;
}
.why-step-caption {
  font-size: 12px;
  line-height: 1.6;
  opacity: 0.68;
}
.why-return {
  position: relative;
  margin: 0 12.5%;
  height: 42px;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}
.why-return::before {
  content: "";
  position: absolute;
  inset: 0 0 10px;
  border: 1px solid #4c563b;
  border-top: 0;
}
.why-return::after {
  content: "↑";
  position: absolute;
  top: -6px;
  left: -5px;
  color: #90a272;
  font-size: 17px;
  line-height: 1;
}
.why-restart {
  position: relative;
  background: var(--why-bg);
  border: 0;
  padding: 2px 12px;
  color: #b4c399 !important;
  font-size: 12px !important;
  line-height: 1.5;
  max-width: 90%;
}
.why-restart:hover {
  color: var(--why-accent) !important;
}
.why-restart > span:first-child {
  padding-right: 6px;
}
.why-step-detail {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  padding: 22px 24px;
  border: 1px solid var(--why-line);
  background: #11120f;
  margin-top: 14px;
  min-height: 119px;
}
.why-detail-number {
  color: #c9f34a;
  font: 11px/1.6 var(--font-mono, Consolas, monospace);
  letter-spacing: 0.04em;
}
.why-detail-name {
  font-size: 19px;
  line-height: 1.4;
  margin-top: 5px !important;
  font-weight: 600;
}
.why-detail-body {
  font-size: 14px;
  line-height: 1.8;
  color: #c7c9c1;
}
.why-output {
  display: flex;
  gap: 15px;
  align-items: baseline;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
}
.why-output > span {
  color: var(--why-muted);
  white-space: nowrap;
}
.why-output strong {
  color: #dce5c9;
  font-weight: 500;
}
.why-section-end {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 27px;
}
.why-source-links {
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
}
.why-source-toggle {
  background: none;
  border: 0;
  padding: 6px 0;
  font-size: 12px !important;
  color: var(--why-muted) !important;
  display: flex;
  align-items: center;
  gap: 12px;
}
.why-pdf-link {
  font-size: 12px !important;
  color: var(--why-muted) !important;
}
.why-source-toggle:hover,
.why-pdf-link:hover {
  color: var(--why-text) !important;
}
.why-cta {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px !important;
  color: var(--why-accent) !important;
  min-height: 44px;
  white-space: nowrap;
}
.why-cta > span:last-child {
  font-size: 21px;
}
.why-source-panel {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--why-line);
  background: #111;
}
.why-source-panel p {
  color: var(--why-muted);
  font-size: 13px;
  margin-bottom: 12px;
}
.why-source-panel img {
  display: block;
  width: 100%;
  height: auto;
}
.why-cbdes[lang="en"] {
  font-family: Arial, Helvetica, sans-serif;
}
.why-cbdes[lang="en"] .why-intro h2 {
  font-size: clamp(29px, 3.05vw, 44px);
}
.why-cbdes[lang="en"] .why-challenge h3 {
  font-size: 22px;
}
.why-cbdes[lang="en"] .why-challenge {
  display: flex;
  flex-direction: column;
}
.why-cbdes[lang="en"] .why-challenge p {
  flex-grow: 1;
}
.why-cbdes[lang="en"] .why-detail-number {
  flex-shrink: 0;
  white-space: nowrap;
}
.why-cbdes[lang="en"] .why-equation-row h3 {
  max-width: 280px;
  font-size: 16px;
}
.why-cbdes[lang="en"] .why-platform-top {
  align-items: flex-start;
  flex-direction: column;
  gap: 8px;
}
.why-cbdes[lang="en"] .why-platform h4 span {
  display: block;
}
.why-cbdes[lang="en"] .why-platform h4 span + span {
  margin-top: 4px;
}
.why-cbdes[lang="en"] .why-flow-heading {
  flex-wrap: wrap;
  gap: 8px 18px;
}
.why-cbdes[lang="en"] .why-return {
  height: auto;
  min-height: 42px;
  padding-top: 18px;
}
.why-cbdes[lang="en"] .why-step-name {
  font-size: 16px;
}
.why-cbdes[lang="en"] .why-stage {
  grid-template-columns: 20px 1fr;
  column-gap: 7px;
}
@media (max-width: 1100px) {
  .why-intro {
    gap: 32px;
  }
  .why-equation-row {
    padding: 22px;
  }
  .why-equation {
    gap: 12px;
  }
  .why-challenge {
    padding: 20px;
  }
  .why-platform {
    padding: 22px;
  }
  .why-platform-top {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
  .why-stage {
    padding: 14px 12px;
    grid-template-columns: 20px 1fr;
    gap: 4px 6px;
  }
  .why-step-name {
    font-size: 16px;
  }
  .why-cbdes[lang="en"] .why-step-name {
    font-size: 15px;
  }
}
@media (max-width: 760px) {
  .why-shell {
    padding: 44px 20px 28px;
  }
  .why-intro {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 24px;
  }
  .why-intro h2 {
    font-size: 34px;
  }
  .why-lead {
    font-size: 14px;
    max-width: none;
    line-height: 1.85;
  }
  .why-challenges {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .why-challenge {
    padding: 18px 20px;
  }
  .why-card-meta {
    margin-bottom: 10px;
  }
  .why-challenge h3 {
    font-size: 21px;
    margin-bottom: 8px;
  }
  .why-challenge p {
    min-height: 0;
  }
  .why-need {
    margin-top: 12px;
    padding-top: 10px;
  }
  .why-equation-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 22px 20px;
  }
  .why-equation {
    font-size: clamp(24px, 5.6vw, 38px);
    gap: 12px;
  }
  .why-platforms {
    grid-template-columns: 1fr;
  }
  .why-platform {
    padding: 22px 20px;
  }
  .why-platform + .why-platform {
    border-left: 0;
    border-top: 1px solid #303728;
  }
  .why-platform-top {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
  }
  .why-product {
    font-size: 23px;
  }
  .why-platform h4 {
    font-size: 14px;
  }
  .why-flow-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }
  .why-stages {
    grid-template-columns: 1fr;
    gap: 19px;
  }
  .why-stage {
    grid-template-columns: 24px 1fr auto;
    align-items: center;
    min-height: 65px;
    padding: 16px;
    gap: 8px;
  }
  .why-cbdes[lang="en"] .why-stage {
    grid-template-columns: 22px 1fr;
  }
  .why-step-number {
    grid-row: auto;
    padding: 0;
  }
  .why-step-caption {
    text-align: right;
  }
  .why-cbdes[lang="en"] .why-step-caption {
    grid-column: 2;
    text-align: left;
  }
  .why-stage:not(:last-child)::after {
    content: "↓";
    top: auto;
    bottom: -18px;
    left: 50%;
    right: auto;
    transform: none;
    line-height: 1;
  }
  .why-return {
    margin: 0 15px;
    height: 48px;
  }
  .why-restart {
    font-size: 11px !important;
    max-width: 91%;
    padding-inline: 7px;
  }
  .why-step-detail {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px;
    min-height: 190px;
  }
  .why-detail-title {
    display: flex;
    align-items: center;
    gap: 16px;
  }
  .why-detail-name {
    margin: 0 !important;
    font-size: 18px;
  }
  .why-output {
    flex-direction: column;
    gap: 3px;
  }
  .why-section-end {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
  .why-source-links {
    gap: 16px;
  }
  .why-source-toggle,
  .why-pdf-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .why-cta {
    justify-content: space-between;
    width: 100%;
    border-top: 1px solid var(--why-line);
    padding-top: 20px;
  }
  .why-source-panel {
    padding: 10px;
  }
}
@media (max-width: 370px) {
  .why-intro h2 {
    font-size: 29px;
  }
  .why-cbdes[lang="en"] .why-intro h2 {
    font-size: 27px;
  }
  .why-equation {
    font-size: 22px;
    gap: 9px;
  }
  .why-stage {
    grid-template-columns: 24px 1fr;
  }
  .why-step-caption {
    grid-column: 2;
    text-align: left;
  }
}
@media (prefers-reduced-motion: reduce) {
  .why-cbdes * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* Keep the feedback route connected to the first stage on narrow screens. */
.why-flow-track {
  position: relative;
}
.why-source-links:has(> [hidden]):not(:has(> :not([hidden]))) {
  display: none;
}
.why-section-end {
  justify-content: flex-end;
}
.why-cta {
  white-space: normal;
}
.why-intro > *,
.why-step-detail > * {
  min-width: 0;
}
@media (max-width: 760px) {
  .why-flow-track {
    padding-left: 18px;
  }
  .why-flow-track::before {
    content: "";
    position: absolute;
    left: 0;
    top: 32px;
    bottom: 22px;
    width: 18px;
    border: 1px solid #4c563b;
    border-right: 0;
  }
  .why-flow-track::after {
    content: "→";
    position: absolute;
    top: 21px;
    left: 7px;
    color: #90a272;
    line-height: 20px;
  }
  .why-return {
    margin: 0;
    height: auto;
    min-height: 58px;
    align-items: center;
  }
  .why-return::before,
  .why-return::after {
    display: none;
  }
  .why-restart {
    max-width: 100%;
    text-align: left;
  }
}