.page-contact {
  --co-red: var(--board);
  --co-card-pad: 24px;
  padding-bottom: 72px;
}

/* ---------- 面包屑间距 ---------- */
.page-contact .crumbs {
  margin: 20px 0 28px;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  display: block;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.page-contact .co-hero__frame {
  display: grid;
  gap: 18px;
}

.page-contact .co-hero__eyebrow {
  color: var(--brass);
  margin: 0;
}

.page-contact .co-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 38px;
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--chalk);
  text-transform: none;
}

.page-contact .co-hero__lede {
  margin: 0;
  max-width: 720px;
  color: var(--chalk);
  font-size: 16px;
  line-height: 1.75;
  opacity: 0.9;
}

.page-contact .co-hero__facts {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  border-top: 1px solid var(--line-soft);
  padding-top: 18px;
}

.page-contact .co-hero__fact {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-contact .co-hero__fact-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-contact .co-hero__fact-label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .co-hero__media {
  margin: 24px 0 0;
}

.page-contact .co-hero__media .media__caption {
  color: var(--mist);
}

/* ---------- 流程轨道 ---------- */
.page-contact .co-track {
  margin: 54px 0 60px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(79, 224, 196, 0.06), rgba(11, 31, 26, 0) 62%);
}

.page-contact .co-track__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-contact .co-track__node {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num name"
    "num hint";
  align-items: center;
  column-gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .co-track__node:last-child {
  border-bottom: 0;
}

.page-contact .co-track__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--brass);
}

.page-contact .co-track__name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  line-height: 1.1;
  color: var(--chalk);
}

.page-contact .co-track__hint {
  grid-area: hint;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 通用章节标题 ---------- */
.page-contact .co-section-title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.15;
  color: var(--chalk);
}

/* ---------- 合作形式 ---------- */
.page-contact .co-forms__head {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}

.page-contact .co-forms__intro {
  margin: 0;
  max-width: 720px;
  color: var(--chalk);
  opacity: 0.82;
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .co-forms__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-contact .co-form-card {
  position: relative;
  background: var(--turf);
  padding: var(--co-card-pad);
  padding-top: 34px;
  border-top: 1px solid var(--line);
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.page-contact .co-form-card--cut {
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-contact .co-form-card__mark {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 34px;
  height: 18px;
  border-top: 2px solid var(--cyan);
}

.page-contact .co-form-card__mark--arc {
  border-radius: 50% 50% 0 0;
  border-left: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
  opacity: 0.85;
}

.page-contact .co-form-card__mark--slash {
  border-top: 0;
  border-bottom: 2px solid var(--flare);
  transform: rotate(-6deg);
}

.page-contact .co-form-card__mark--tri {
  height: 0;
  width: 0;
  border-top: 2px solid var(--brass);
  border-right: 18px solid transparent;
  transform: skewX(-18deg);
  opacity: 0.9;
}

.page-contact .co-form-card__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  line-height: 1.1;
  color: var(--chalk);
}

.page-contact .co-form-card__body {
  margin: 0 0 16px;
  color: var(--chalk);
  opacity: 0.86;
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .co-form-card__fit {
  margin: 0 0 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-contact .co-form-card__fit .label {
  color: var(--brass);
  margin-right: 8px;
}

.page-contact .co-form-card__fit:last-child {
  margin-bottom: 0;
}

/* ---------- 数据资源 ---------- */
.page-contact .co-assets {
  margin-top: 64px;
  padding: 34px 22px;
  background: var(--field);
  border: 1px solid var(--line);
}

.page-contact .co-assets__inner {
  display: grid;
  gap: 26px;
}

.page-contact .co-assets__lead {
  display: grid;
  gap: 12px;
}

.page-contact .co-assets__text {
  margin: 0;
  max-width: 720px;
  color: var(--chalk);
  opacity: 0.86;
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .co-assets__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.page-contact .co-assets__stat {
  display: grid;
  gap: 4px;
  padding: 16px 14px;
  background: var(--turf);
  border-left: 2px solid var(--cyan-line);
}

.page-contact .co-assets__stat .stat__value {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
}

.page-contact .co-assets__stat .stat__unit {
  font-size: 14px;
  margin-left: 0.25em;
  color: var(--mist);
}

.page-contact .co-assets__stat .stat__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .co-assets__stat .stat__spark svg {
  display: block;
  width: 100%;
  max-width: 130px;
  height: 22px;
  fill: none;
  stroke: var(--brass);
  stroke-width: 1.6;
  opacity: 0.75;
}

.page-contact .co-assets__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-contact .co-assets__item {
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}

.page-contact .co-assets__item-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  color: var(--chalk);
}

.page-contact .co-assets__item p {
  margin: 0;
  color: var(--chalk);
  opacity: 0.8;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 周期 ---------- */
.page-contact .co-cycle {
  margin-top: 64px;
  display: grid;
  gap: 12px;
}

.page-contact .co-cycle__grid {
  display: grid;
  gap: 18px;
  margin-top: 12px;
}

.page-contact .co-cycle__text {
  margin: 0;
  max-width: 720px;
  color: var(--chalk);
  opacity: 0.86;
  font-size: 16px;
  line-height: 1.75;
  border-left: 2px solid var(--line);
  padding-left: 16px;
}

/* ---------- 流程四步 ---------- */
.page-contact .co-steps {
  margin-top: 64px;
  display: grid;
  gap: 12px;
}

.page-contact .co-steps__intro {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.page-contact .co-steps__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .co-step__box {
  background: var(--turf);
  border-left: 2px solid var(--brass);
}

.page-contact .co-step__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  min-height: 44px;
}

.page-contact .co-step__summary::-webkit-details-marker {
  display: none;
}

.page-contact .co-step__num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--brass);
}

.page-contact .co-step__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  color: var(--chalk);
}

.page-contact .co-step__sub {
  width: 100%;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-contact .co-step__panel {
  padding: 0 20px 20px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .co-step__panel p {
  margin: 14px 0 12px;
  color: var(--chalk);
  opacity: 0.86;
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .co-step__deliver {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .co-step__deliver li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--chalk);
  opacity: 0.82;
}

.page-contact .co-step__deliver li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 2px;
  background: var(--cyan);
}

.page-contact .co-steps__media {
  margin: 26px 0 0;
  max-width: 520px;
}

.page-contact .co-steps__media .media__caption {
  color: var(--mist);
}

/* ---------- 联系信息牌 ---------- */
.page-contact .co-contact {
  margin-top: 64px;
}

.page-contact .co-contact__card {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--co-red);
  padding: 26px 20px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-contact .co-contact__head {
  display: grid;
  gap: 10px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(26, 21, 16, 0.18);
}

.page-contact .co-contact__tag {
  color: var(--co-red);
  letter-spacing: 0.16em;
  font-size: 12px;
}

.page-contact .co-contact__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 28px;
  line-height: 1.1;
  color: var(--ink);
}

.page-contact .co-contact__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.86;
}

.page-contact .co-contact__list {
  margin: 20px 0 0;
  display: grid;
  gap: 16px;
}

.page-contact .co-contact__row {
  display: grid;
  gap: 6px;
}

.page-contact .co-contact__key {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--co-red);
}

.page-contact .co-contact__val {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .co-contact__mail,
.page-contact .co-contact__mono {
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0;
}

.page-contact .co-copy {
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-contact .co-copy:hover,
.page-contact .co-copy:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--field);
}

.page-contact .co-contact__cities {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(26, 21, 16, 0.18);
}

.page-contact .co-contact__cities-label {
  margin: 0 0 10px;
  color: var(--ink);
  opacity: 0.7;
}

.page-contact .co-contact__city-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .co-contact__city-list .city-chip {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid rgba(26, 21, 16, 0.35);
  background: rgba(26, 21, 16, 0.04);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq {
  margin-top: 64px;
  display: grid;
  gap: 12px;
}

.page-contact .co-faq__list {
  margin-top: 14px;
  border-top: 1px solid var(--line);
}

.page-contact .co-faq__item {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .co-faq__q {
  padding: 18px 20px 18px 0;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.3;
  color: var(--chalk);
  position: relative;
}

.page-contact .co-faq__q::-webkit-details-marker {
  display: none;
}

.page-contact .co-faq__q::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--flare);
}

.page-contact .co-faq__item[open] .co-faq__q::after {
  content: "–";
  color: var(--cyan);
}

.page-contact .co-faq__a {
  padding: 0 20px 20px 0;
}

.page-contact .co-faq__a p {
  margin: 0;
  max-width: 720px;
  color: var(--chalk);
  opacity: 0.84;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 延伸 ---------- */
.page-contact .co-next {
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.page-contact .co-next__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  color: var(--chalk);
}

.page-contact .co-next__text {
  margin: 0 0 18px;
  max-width: 620px;
  color: var(--chalk);
  opacity: 0.82;
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .co-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .co-next__link {
  display: block;
  padding: 14px 16px;
  min-height: 44px;
  border: 1px solid var(--line);
  background: var(--turf);
  color: var(--cyan);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.page-contact .co-next__link:hover,
.page-contact .co-next__link:focus-visible {
  border-color: var(--cyan);
  background: var(--turf-lift);
  color: var(--chalk);
}

.page-contact .co-next__link:focus-visible,
.page-contact .co-copy:focus-visible,
.page-contact .co-step__summary:focus-visible,
.page-contact .co-faq__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-contact .co-hero__title {
    font-size: 54px;
  }

  .page-contact .co-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-track__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-track__node {
    grid-template-columns: 1fr;
    grid-template-areas:
      "num"
      "name"
      "hint";
    row-gap: 6px;
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
    padding: 20px 18px;
  }

  .page-contact .co-track__node:last-child {
    border-right: 0;
  }

  .page-contact .co-forms__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .co-form-card:hover {
    transform: translateY(-4px);
    background: var(--turf-lift);
    border-top-color: var(--cyan);
  }

  .page-contact .co-assets {
    padding: 44px 40px;
  }

  .page-contact .co-assets__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: 40px;
  }

  .page-contact .co-assets__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 32px;
  }

  .page-contact .co-cycle__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-contact .co-contact__card {
    padding: 38px 40px;
  }

  .page-contact .co-contact__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 40px;
  }

  .page-contact .co-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1060px) {
  .page-contact .co-hero {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 44px;
    align-items: end;
  }

  .page-contact .co-hero__frame {
    padding-bottom: 8px;
  }

  .page-contact .co-hero__title {
    font-size: 64px;
  }

  .page-contact .co-hero__media {
    margin-top: 0;
  }

  .page-contact .co-section-title {
    font-size: 32px;
  }

  .page-contact .co-assets__stat .stat__value {
    font-size: 40px;
  }

  .page-contact .co-steps__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 20px;
  }

  .page-contact .co-steps__media {
    max-width: 560px;
  }

  .page-contact .co-contact__title {
    font-size: 34px;
  }

  .page-contact .co-next {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 12px 40px;
    align-items: start;
  }

  .page-contact .co-next__title,
  .page-contact .co-next__text {
    grid-column: 1;
  }

  .page-contact .co-next__links {
    grid-column: 2;
    grid-row: 1 / span 2;
  }
}