.cooperation-page {
  --coop-ink: #595757;
  --coop-muted: #6f6c69;
  --coop-line: #cac8c5;
  --coop-soft: #f1f1f0;
  --coop-soft-2: #e7e7e6;
  --coop-accent: #777674;
  color: var(--coop-ink);
}

.cooperation-page .main-content {
  overflow: clip;
}

.cooperation-page-head {
  margin-bottom: 0;
}

.cooperation-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  gap: clamp(40px, 8vw, 120px);
  align-items: end;
  padding: clamp(72px, 10vw, 150px) 0 clamp(80px, 11vw, 160px);
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-eyebrow,
.cooperation-section-head > div > p,
.cooperation-next > div > p {
  margin: 0 0 18px;
  color: var(--coop-muted);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.cooperation-hero h1 {
  max-width: 820px;
  margin: 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: clamp(42px, 6.2vw, 82px);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -.035em;
}

.cooperation-hero-copy > p:last-of-type {
  max-width: 680px;
  margin: 32px 0 0;
  color: var(--coop-muted);
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.9;
}

.cooperation-hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 38px;
}

.cooperation-hero-summary {
  border-top: 1px solid var(--coop-line);
}

.cooperation-hero-summary div {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  align-items: center;
  min-height: 78px;
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-hero-summary span {
  color: var(--coop-muted);
  font-size: 12px;
  letter-spacing: .12em;
}

.cooperation-hero-summary strong {
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 20px;
  font-weight: 500;
}

.cooperation-roadmap,
.cooperation-notes {
  scroll-margin-top: 100px;
  padding: clamp(84px, 10vw, 150px) 0;
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 470px);
  gap: 48px;
  align-items: end;
  margin-bottom: clamp(50px, 7vw, 90px);
}

.cooperation-section-head h2,
.cooperation-next h2 {
  margin: 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: clamp(34px, 4.2vw, 56px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -.025em;
}

.cooperation-section-head > p {
  margin: 0;
  color: var(--coop-muted);
  line-height: 1.85;
}

.cooperation-phase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--coop-line);
  border-left: 1px solid var(--coop-line);
}

.cooperation-phase {
  min-width: 0;
  border-right: 1px solid var(--coop-line);
}

.cooperation-phase-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  min-height: 90px;
  padding: 26px 28px;
  background: var(--coop-soft);
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-phase-title span {
  color: var(--coop-muted);
  font-size: 11px;
  letter-spacing: .16em;
}

.cooperation-phase-title h3 {
  margin: 0;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 24px;
  font-weight: 500;
}

.cooperation-phase ol {
  padding: 0;
  margin: 0;
  list-style: none;
}

.cooperation-step {
  position: relative;
  min-height: 390px;
  padding: 30px 28px 34px;
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-step::after {
  content: "";
  position: absolute;
  left: 43px;
  bottom: -10px;
  z-index: 2;
  width: 18px;
  height: 18px;
  background: #fff;
  border-right: 1px solid var(--coop-line);
  border-bottom: 1px solid var(--coop-line);
  transform: rotate(45deg);
}

.cooperation-phase:last-child .cooperation-step:last-child::after,
.cooperation-phase:nth-child(1) .cooperation-step:last-child::after,
.cooperation-phase:nth-child(2) .cooperation-step:last-child::after {
  display: none;
}

.cooperation-step-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 34px;
}

.cooperation-step-number {
  color: var(--coop-muted);
  font-size: 13px;
  letter-spacing: .14em;
}

.cooperation-step-icon,
.cooperation-note-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  color: var(--coop-accent);
  background: var(--coop-soft);
  border-radius: 50%;
}

.wjt-line-icon {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
}

.cooperation-step h4 {
  margin: 0 0 18px;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 23px;
  font-weight: 500;
  line-height: 1.45;
}

.cooperation-step > p {
  margin: 0;
  color: var(--coop-muted);
  font-size: 15px;
  line-height: 1.9;
}

.cooperation-step-outcome {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--coop-line);
}

.cooperation-step-outcome span {
  display: block;
  margin-bottom: 7px;
  color: var(--coop-muted);
  font-size: 10px;
  letter-spacing: .16em;
}

.cooperation-step-outcome strong {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.65;
}

.cooperation-note-index {
  position: sticky;
  top: 72px;
  z-index: 6;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  background: rgba(255, 255, 255, .96);
  border-top: 1px solid var(--coop-line);
  border-left: 1px solid var(--coop-line);
  backdrop-filter: blur(10px);
}

.cooperation-note-index a {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 12px;
  align-items: center;
  min-height: 74px;
  padding: 14px 18px;
  color: var(--coop-muted);
  border-right: 1px solid var(--coop-line);
  border-bottom: 1px solid var(--coop-line);
  text-decoration: none;
}

.cooperation-note-index a::after {
  content: "";
  position: absolute;
  bottom: -1px;
  height: 2px;
  background: var(--coop-ink);
  transform: scaleX(0);
  transition: transform .2s ease;
}

.cooperation-note-index a[aria-current="true"] {
  color: var(--coop-ink);
  background: var(--coop-soft);
}

.cooperation-note-index a[aria-current="true"]::after {
  transform: scaleX(1);
}

.cooperation-note-index svg {
  width: 19px;
  height: 19px;
}

.cooperation-note-index span {
  font-size: 11px;
  letter-spacing: .12em;
}

.cooperation-note-index strong {
  font-size: 14px;
  font-weight: 500;
}

.cooperation-note-list {
  border-left: 1px solid var(--coop-line);
}

.cooperation-note {
  scroll-margin-top: 150px;
  border-right: 1px solid var(--coop-line);
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-note summary {
  display: grid;
  grid-template-columns: 64px 54px minmax(0, 1fr) 30px;
  gap: 20px;
  align-items: center;
  min-height: 118px;
  padding: 22px 28px;
  cursor: pointer;
  list-style: none;
}

.cooperation-note summary::-webkit-details-marker { display: none; }

.cooperation-note summary:focus-visible {
  outline: 2px solid var(--coop-accent);
  outline-offset: -4px;
}

.cooperation-note-number {
  color: var(--coop-muted);
  font-size: 13px;
  letter-spacing: .14em;
}

.cooperation-note summary > span:nth-child(3) small,
.cooperation-note summary > span:nth-child(3) strong {
  display: block;
}

.cooperation-note summary small {
  margin-bottom: 6px;
  color: var(--coop-muted);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .06em;
}

.cooperation-note summary strong {
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: clamp(22px, 2.5vw, 32px);
  font-weight: 500;
}

.cooperation-note summary > i {
  position: relative;
  width: 22px;
  height: 22px;
}

.cooperation-note summary > i::before,
.cooperation-note summary > i::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 3px;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform .2s ease;
}

.cooperation-note summary > i::after { transform: rotate(90deg); }
.cooperation-note[open] summary > i::after { transform: rotate(0deg); }
.cooperation-note[open] summary { background: var(--coop-soft); }

.cooperation-note-body {
  padding: 12px clamp(28px, 7vw, 96px) clamp(58px, 8vw, 96px) 166px;
  animation: coopReveal .2s ease both;
}

@keyframes coopReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.cooperation-note-section {
  max-width: 860px;
  padding: 34px 0;
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-note-section:last-child { border-bottom: 0; }

.cooperation-note-section h3,
.cooperation-common-services h3 {
  margin: 0 0 20px;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 23px;
  font-weight: 500;
}

.cooperation-note-section p,
.cooperation-common-services p,
.cooperation-note-closing,
.cooperation-plan-card > p {
  margin: 0 0 14px;
  color: var(--coop-muted);
  line-height: 1.9;
}

.cooperation-note-section ul,
.cooperation-plan-card ul {
  margin: 18px 0;
  padding-left: 1.35em;
  color: var(--coop-muted);
  line-height: 1.85;
}

.cooperation-note-section aside {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin: 24px 0;
  padding: 20px 22px;
  background: var(--coop-soft);
  border-left: 2px solid var(--coop-accent);
}

.cooperation-note-section aside strong {
  font-weight: 500;
  line-height: 1.7;
}

.cooperation-inline-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
}

.cooperation-inline-flow li {
  position: relative;
  padding: 9px 14px;
  background: var(--coop-soft);
  font-size: 13px;
}

.cooperation-inline-flow li:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -22px;
  color: var(--coop-muted);
}

.cooperation-common-services {
  margin: 34px 0 42px;
  padding: 30px;
  background: var(--coop-soft);
}

.cooperation-common-services ul {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.cooperation-common-services li {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 14px;
}

.cooperation-plan-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  max-width: 980px;
  margin-bottom: 34px;
}

.cooperation-plan-card {
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--coop-line);
}

.cooperation-plan-card header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  margin-bottom: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--coop-line);
}

.cooperation-plan-card header span {
  grid-row: 1 / span 2;
  align-self: center;
  font-family: "Noto Serif TC", "Songti TC", serif;
  font-size: 25px;
}

.cooperation-plan-card header strong {
  font-size: 27px;
  font-weight: 500;
}

.cooperation-plan-card header small {
  text-align: right;
  color: var(--coop-muted);
}

.cooperation-plan-card h4 {
  margin: 18px 0 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .12em;
}

.cooperation-plan-excludes {
  padding: 4px 18px;
  background: var(--coop-soft);
}

.cooperation-plan-delivery {
  margin-top: 20px !important;
}

.cooperation-plan-card dl {
  margin: auto 0 24px;
  padding-top: 18px;
}

.cooperation-plan-card dl div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--coop-line);
}

.cooperation-plan-card dt { color: var(--coop-muted); font-size: 13px; }
.cooperation-plan-card dd { margin: 0; font-weight: 600; }
.cooperation-note-closing { max-width: 900px; }

.cooperation-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 50px;
  align-items: end;
  margin: clamp(80px, 10vw, 150px) 0;
  padding: clamp(40px, 6vw, 76px);
  background: var(--coop-soft);
}

.cooperation-next > div:first-child > span {
  display: block;
  max-width: 720px;
  margin-top: 22px;
  color: var(--coop-muted);
  line-height: 1.8;
}

.cooperation-next > div:last-child {
  display: flex;
  gap: 12px;
}

@media (max-width: 1100px) {
  .cooperation-step { min-height: 430px; padding-inline: 22px; }
  .cooperation-phase-title { padding-inline: 22px; }
  .cooperation-note-body { padding-left: 104px; }
}

@media (max-width: 900px) {
  .cooperation-hero { grid-template-columns: 1fr; }
  .cooperation-hero-summary { display: grid; grid-template-columns: repeat(3, 1fr); }
  .cooperation-hero-summary div { grid-template-columns: 1fr; align-content: center; gap: 5px; padding: 12px; border-right: 1px solid var(--coop-line); }
  .cooperation-section-head { grid-template-columns: 1fr; gap: 22px; }
  .cooperation-phase-grid { grid-template-columns: 1fr; }
  .cooperation-step { min-height: 0; }
  .cooperation-phase:last-child .cooperation-step:not(:last-child)::after,
  .cooperation-phase:nth-child(1) .cooperation-step:last-child::after,
  .cooperation-phase:nth-child(2) .cooperation-step:last-child::after { display: block; }
  .cooperation-phase:nth-child(1) .cooperation-step:last-child::after,
  .cooperation-phase:nth-child(2) .cooperation-step:last-child::after { background: var(--coop-soft); }
  .cooperation-note-index { top: 64px; }
  .cooperation-note-index a { grid-template-columns: auto 1fr; }
  .cooperation-note-index a svg { display: none; }
  .cooperation-note-body { padding-left: 92px; }
  .cooperation-common-services ul { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .cooperation-hero { gap: 48px; padding: 56px 0 86px; }
  .cooperation-hero h1 { font-size: clamp(38px, 12vw, 50px); }
  .cooperation-hero-actions { align-items: flex-start; flex-direction: column; gap: 16px; }
  .cooperation-hero-summary { grid-template-columns: 1fr; }
  .cooperation-hero-summary div { grid-template-columns: 64px 1fr; border-right: 0; }
  .cooperation-roadmap, .cooperation-notes { padding: 74px 0; }
  .cooperation-phase-title { min-height: 74px; }
  .cooperation-step { padding: 26px 20px 32px; }
  .cooperation-step-icon { width: 44px; height: 44px; }
  .cooperation-note-index {
    top: 58px;
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .cooperation-note-index::-webkit-scrollbar { display: none; }
  .cooperation-note-index a { flex: 0 0 auto; min-height: 58px; padding: 10px 14px; white-space: nowrap; }
  .cooperation-note summary { grid-template-columns: 40px 1fr 24px; gap: 12px; min-height: 96px; padding: 18px 16px; }
  .cooperation-note-icon { display: none; }
  .cooperation-note summary > span:nth-child(3) { grid-column: 2; }
  .cooperation-note summary > i { grid-column: 3; }
  .cooperation-note summary small { line-height: 1.5; }
  .cooperation-note-body { padding: 8px 18px 52px; }
  .cooperation-note-section { padding: 28px 0; }
  .cooperation-inline-flow { display: grid; gap: 26px; }
  .cooperation-inline-flow li:not(:last-child)::after { content: "↓"; left: 50%; right: auto; bottom: -23px; top: auto; }
  .cooperation-common-services { padding: 22px 18px; }
  .cooperation-common-services ul { grid-template-columns: 1fr; }
  .cooperation-plan-grid { grid-template-columns: 1fr; }
  .cooperation-plan-card { padding: 22px 18px; }
  .cooperation-next { grid-template-columns: 1fr; gap: 34px; padding: 34px 22px; }
  .cooperation-next > div:last-child { flex-direction: column; }
  .cooperation-next .btn { width: 100%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .cooperation-note-body { animation: none; }
  .cooperation-note summary > i::after { transition: none; }
  .cooperation-page { scroll-behavior: auto; }
}

@media print {
  .cooperation-note-index,
  .cooperation-hero-actions,
  .cooperation-next,
  .cooperation-page .conversion-dock,
  .cooperation-page .site-assistant { display: none !important; }
  .cooperation-hero { padding-block: 30px; }
  .cooperation-roadmap,
  .cooperation-notes { padding-block: 36px; }
  .cooperation-phase-grid { grid-template-columns: 1fr; }
  .cooperation-step { min-height: 0; break-inside: avoid; }
  .cooperation-note:not([open]) > *:not(summary) { display: block !important; }
  .cooperation-note { break-inside: avoid; }
  .cooperation-note-body { padding: 12px 24px 30px; }
}