.page-contact {
  --rail-w: 336px;
  --coop-a: #EAF4EC;
  --coop-a-edge: #BEDCC8;
  --coop-b: #DDEFE1;
  --coop-b-edge: #A6D1B5;
  --coop-c: #CBE6D4;
  --coop-c-edge: #8FC4A1;
  background-color: var(--sand);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-contact .crumb-row {
  padding-block: clamp(16px, 2.6vw, 26px) 6px;
}
.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
}
.page-contact .breadcrumb a {
  color: var(--green-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
.page-contact .breadcrumb a:hover {
  border-bottom-color: var(--green);
}

/* ---------- 首屏 ---------- */
.page-contact .lead {
  position: relative;
  padding-block: clamp(18px, 3vw, 30px) clamp(28px, 5vw, 52px);
  border-bottom: var(--rule);
  overflow: hidden;
}
.page-contact .lead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(199, 191, 176, .38) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(199, 191, 176, .38) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: .55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 86%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 86%);
}
.page-contact .lead__inner {
  position: relative;
}
.page-contact .lead__index {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--green-deep);
}
.page-contact .lead__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(29px, 5.4vw, 54px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ink);
}
.page-contact .lead__intro {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.78;
  color: var(--ink);
}
.page-contact .lead__jump {
  display: grid;
  gap: 1px;
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
}
@media (min-width: 760px) {
  .page-contact .lead__jump {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-contact .jump {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  background: rgba(255, 255, 255, .72);
  text-decoration: none;
  color: var(--ink);
  transition: background-color .18s ease;
}
.page-contact .jump:hover,
.page-contact .jump:focus-visible {
  background: var(--mist);
}
.page-contact .jump__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--green-deep);
}
.page-contact .jump__label {
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.4;
}
.page-contact .jump__arrow {
  font-size: 13px;
  color: var(--orange);
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-block: clamp(30px, 5vw, 56px);
}
@media (min-width: 960px) {
  .page-contact .contact-body {
    grid-template-columns: minmax(0, 1fr) var(--rail-w);
    gap: 48px;
    align-items: start;
  }
  .page-contact .rail {
    position: sticky;
    top: 20px;
  }
}
.page-contact .contact-body__main {
  display: grid;
  gap: clamp(38px, 6vw, 66px);
  min-width: 0;
}

/* ---------- 章节标题 ---------- */
.page-contact .sec-head {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  column-gap: 14px;
  margin-bottom: clamp(18px, 3vw, 28px);
  padding-bottom: 12px;
  border-bottom: var(--rule);
}
.page-contact .sec-head__no {
  margin: 0;
  padding-top: .55em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--green-deep);
}
.page-contact .sec-head__title {
  margin: 0;
  font-size: clamp(20px, 2.8vw, 29px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-contact .sec-head__sub {
  grid-column: 2;
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 合作类型 ---------- */
.page-contact .coop {
  display: grid;
  gap: 13px;
}
.page-contact .coop__card {
  border: 1px solid var(--coop-edge);
  border-radius: 3px;
  background: var(--coop-bg);
  box-shadow: 0 1px 0 rgba(27, 30, 34, .04);
}
.page-contact .coop__card--a {
  --coop-bg: var(--coop-a);
  --coop-edge: var(--coop-a-edge);
}
.page-contact .coop__card--b {
  --coop-bg: var(--coop-b);
  --coop-edge: var(--coop-b-edge);
}
.page-contact .coop__card--c {
  --coop-bg: var(--coop-c);
  --coop-edge: var(--coop-c-edge);
}
.page-contact .coop__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}
.page-contact .coop__summary::-webkit-details-marker {
  display: none;
}
.page-contact .coop__summary::marker {
  content: "";
}
.page-contact .coop__no {
  display: inline-block;
  min-width: 24px;
  padding: 3px 7px;
  border: 1px solid var(--coop-edge);
  border-radius: 2px;
  background: rgba(255, 255, 255, .75);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-align: center;
  color: var(--green-deep);
}
.page-contact .coop__name {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}
.page-contact .coop__hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
  white-space: nowrap;
}
.page-contact .coop__hint::after {
  content: "＋";
  font-size: 14px;
  line-height: 1;
  color: var(--green-deep);
  transition: transform .2s ease;
}
.page-contact .coop__card[open] .coop__hint::after {
  transform: rotate(45deg);
}
.page-contact .coop__body {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--coop-edge);
  background: rgba(255, 255, 255, .62);
}
.page-contact .coop__body p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}
.page-contact .coop__body ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .coop__body li {
  position: relative;
  padding-left: 17px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--muted);
}
.page-contact .coop__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--green);
}
.page-contact .coop__figure {
  margin-top: 18px;
}

/* ---------- 纠错 ---------- */
.page-contact .fix__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
@media (min-width: 700px) {
  .page-contact .fix__grid {
    grid-template-columns: minmax(0, 1fr) 216px;
    gap: 28px;
    align-items: start;
  }
}
.page-contact .fix__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}
.page-contact .fix__list {
  counter-reset: fixstep;
  display: grid;
  gap: 0;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .fix__list li {
  counter-increment: fixstep;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  padding: 11px 0;
  border-top: 1px dashed var(--line);
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--ink);
}
.page-contact .fix__list li::before {
  content: counter(fixstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--green-deep);
  padding-top: .35em;
}
.page-contact .fix__note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--signal);
  background: rgba(255, 200, 69, .16);
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink);
}
.page-contact .fix__note a {
  color: var(--green-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--green);
}
.page-contact .fix__figure {
  margin: 0;
}

/* ---------- 流程 ---------- */
.page-contact .flow__track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 620px) {
  .page-contact .flow__track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1120px) {
  .page-contact .flow__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
}
.page-contact .flow__step {
  position: relative;
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
  border-radius: 3px;
  background: rgba(255, 255, 255, .82);
}
.page-contact .flow__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 23px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--green);
  opacity: .4;
}
.page-contact .flow__name {
  margin: 0 0 8px;
  font-size: 15.5px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}
.page-contact .flow__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}
.page-contact .flow__role {
  display: inline-block;
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
  opacity: .72;
  transition: opacity .18s ease, color .18s ease;
}
.page-contact .flow__step:hover .flow__role,
.page-contact .flow__step:focus-within .flow__role {
  opacity: 1;
  color: var(--green-deep);
}
@media (min-width: 1120px) {
  .page-contact .flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 40px;
    right: -13px;
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--signal);
    border-bottom: 2px solid var(--signal);
    transform: rotate(-45deg);
  }
}

/* ---------- 常见关注 ---------- */
.page-contact .ask__list {
  border-top: var(--rule);
}
.page-contact .ask__item {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: var(--rule);
}
@media (min-width: 720px) {
  .page-contact .ask__item {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 26px;
    padding: 20px 0;
  }
}
.page-contact .ask__q {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}
.page-contact .ask__a {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}
.page-contact .ask__a a {
  color: var(--green-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--green);
}

/* ---------- 右侧联系卡 ---------- */
.page-contact .rail__card {
  position: relative;
  z-index: 0;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #fff;
  box-shadow: 6px 6px 0 var(--mist), 6px 6px 0 1px var(--line), var(--shadow-paper);
}
.page-contact .rail__tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--muted);
}
.page-contact .rail__title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}
.page-contact .rail__list {
  display: grid;
  margin: 14px 0 0;
}
.page-contact .rail__row {
  display: grid;
  gap: 3px;
  padding: 11px 0;
  border-top: 1px dashed var(--line);
}
.page-contact .rail__row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--muted);
}
.page-contact .rail__row dd {
  margin: 0;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
}
.page-contact .rail__row dd.is-mono {
  font-family: var(--font-mono);
  letter-spacing: -.01em;
}
.page-contact .rail__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}
.page-contact .rail__btn {
  display: block;
  margin-top: 16px;
  text-align: center;
}

/* ---------- 尾部橙色带 ---------- */
.page-contact .closer {
  margin-top: clamp(30px, 5vw, 60px);
  background: var(--orange);
  color: var(--ink);
}
.page-contact .closer__inner {
  display: grid;
  gap: 18px;
  padding-block: clamp(24px, 4vw, 42px);
}
@media (min-width: 860px) {
  .page-contact .closer__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 40px;
  }
}
.page-contact .closer__index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(27, 30, 34, .68);
}
.page-contact .closer__title {
  margin: 0 0 8px;
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-contact .closer__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(27, 30, 34, .82);
}
.page-contact .closer__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-contact .closer__btn {
  background: var(--night);
  border: 1px solid var(--night);
  color: #fff;
}
.page-contact .closer__btn:hover,
.page-contact .closer__btn:focus-visible {
  background: #0a1526;
  border-color: #0a1526;
  color: #fff;
}
.page-contact .closer__btn--ghost {
  background: transparent;
  border-color: rgba(27, 30, 34, .55);
  color: var(--ink);
}
.page-contact .closer__btn--ghost:hover,
.page-contact .closer__btn--ghost:focus-visible {
  background: rgba(255, 255, 255, .38);
  border-color: var(--ink);
  color: var(--ink);
}

/* ---------- 宽屏微调 ---------- */
@media (min-width: 1180px) {
  .page-contact .lead__title {
    max-width: 24ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .jump,
  .page-contact .coop__hint::after,
  .page-contact .flow__role {
    transition: none;
  }
}