.page-contact {
  --co-aside-top: 96px;
  --co-gap: clamp(22px, 3vw, 44px);
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  margin: 0;
  padding-top: clamp(14px, 2vw, 22px);
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  background: var(--pearl);
  padding: clamp(30px, 4.4vw, 62px) 0 clamp(38px, 5vw, 76px);
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -9%;
  width: min(58vw, 720px);
  height: 152%;
  background: linear-gradient(158deg, var(--ink) 0%, var(--ink-2) 58%, var(--ink-3) 100%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .co-hero::after {
  content: "";
  position: absolute;
  right: -6%;
  bottom: 14%;
  width: min(50vw, 600px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lake), transparent);
  pointer-events: none;
  z-index: 1;
}

.page-contact .co-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.page-contact .co-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(2.5rem, 6.6vw, 4.8rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink);
}

.page-contact .co-lede {
  margin: clamp(16px, 2vw, 24px) 0 0;
  max-width: 46em;
  font-size: clamp(1rem, 1.3vw, 1.16rem);
  line-height: 1.8;
  color: var(--graphite);
}

.page-contact .co-hero .tag-row {
  margin-top: clamp(18px, 2.4vw, 28px);
}

/* ---------- 分区外壳 ---------- */
.page-contact .co-section {
  padding: clamp(42px, 6vw, 88px) 0;
}

.page-contact .co-main {
  background: var(--pearl);
}

.page-contact .co-more {
  background: var(--pearl-2);
}

/* ---------- 主栅格 ---------- */
.page-contact .co-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--co-gap);
}

.page-contact .co-grid > * {
  min-width: 0;
}

/* ---------- 左侧深色信息面板 ---------- */
.page-contact .co-aside {
  background: var(--ink);
  color: var(--pearl);
  border: 1px solid var(--ink-2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: clamp(22px, 2.6vw, 34px);
}

.page-contact .co-aside-title {
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
  font-size: clamp(1.2rem, 1.8vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--pearl);
}

.page-contact .co-aside-note {
  margin: 0 0 6px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--lake-2);
}

.page-contact .co-contact {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.page-contact .co-contact li {
  padding: 15px 0;
  border-top: 1px solid var(--line-dark);
}

.page-contact .co-contact li:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.page-contact .co-key {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lake-2);
}

.page-contact .co-val {
  display: block;
  font-size: 15px;
  line-height: 1.55;
  color: var(--pearl);
  word-break: break-word;
}

.page-contact .co-copy {
  margin-top: 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  background: transparent;
  border: 1px solid var(--gold);
  border-radius: 2px;
  color: var(--gold-2);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .co-copy:hover,
.page-contact .co-copy:focus-visible {
  background: var(--gold);
  color: var(--ink);
}

.page-contact .co-copy.is-copied {
  border-color: var(--lake-2);
  background: rgba(168, 211, 208, 0.1);
  color: var(--lake-2);
}

.page-contact .co-hours {
  margin: 0 0 18px;
  padding: 14px 16px;
  border: 1px solid var(--gold);
  border-radius: var(--radius);
  background: rgba(201, 162, 39, 0.09);
}

.page-contact .co-hours-key {
  margin: 0 0 5px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-2);
}

.page-contact .co-hours-val {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--pearl);
}

.page-contact .co-hours-val .mono {
  color: var(--gold-2);
}

.page-contact .co-aside-foot {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--lake-2);
}

.page-contact .co-aside-foot .mono {
  color: var(--pearl);
}

/* ---------- 右列 ---------- */
.page-contact .co-flow {
  display: grid;
  gap: clamp(38px, 5vw, 68px);
}

.page-contact .co-block .section-head {
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

/* ---------- 可展开合作方向 ---------- */
.page-contact .co-dirs {
  border-radius: var(--radius);
}

.page-contact .co-dir {
  border-top: 1px solid var(--line);
  background: transparent;
}

.page-contact .co-dir:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-contact .co-dir > summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 44px 18px 4px;
  list-style: none;
  cursor: pointer;
  transition: background-color 0.2s var(--ease);
}

.page-contact .co-dir > summary::-webkit-details-marker {
  display: none;
}

.page-contact .co-dir > summary::after {
  content: "＋";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 17px;
  line-height: 1;
  color: var(--lake);
  transition: color 0.2s var(--ease);
}

.page-contact .co-dir[open] > summary::after {
  content: "－";
  color: var(--gold);
}

.page-contact .co-dir > summary:hover {
  background: rgba(46, 140, 140, 0.07);
}

.page-contact .co-dir-num {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--lake);
}

.page-contact .co-dir-name {
  font-size: clamp(1.06rem, 1.6vw, 1.26rem);
  font-weight: 600;
  color: var(--graphite);
}

.page-contact .co-dir-tag {
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-contact .co-dir-body {
  padding: 0 4px 24px;
}

.page-contact .co-dir-body > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-contact .co-spec {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px 18px;
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-contact .co-spec dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--lake);
  padding-top: 2px;
}

.page-contact .co-spec dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

/* ---------- 图片 ---------- */
.page-contact .co-figure {
  margin: clamp(26px, 3vw, 40px) 0 0;
}

.page-contact .co-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  background: linear-gradient(140deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-contact .co-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 交付物表格 ---------- */
.page-contact .co-table-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--ink);
}

.page-contact .co-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.page-contact .co-table th {
  padding: 12px 16px 12px 0;
  text-align: left;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--mist);
  white-space: nowrap;
}

.page-contact .co-table td {
  padding: 15px 16px 15px 0;
  border-top: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.7;
  color: var(--graphite);
}

.page-contact .co-table td:first-child {
  font-weight: 600;
  white-space: nowrap;
}

.page-contact .co-table td:last-child {
  padding-right: 0;
  color: var(--lake);
  white-space: nowrap;
}

/* ---------- 流程区 ---------- */
.page-contact .co-process {
  background: var(--ink);
  color: var(--pearl);
}

.page-contact .co-process .eyebrow {
  color: var(--gold-2);
}

.page-contact .co-process .section-title {
  color: var(--pearl);
}

.page-contact .co-process .section-note {
  color: var(--lake-2);
}

.page-contact .co-process .section-head {
  margin-bottom: clamp(30px, 4vw, 46px);
}

.page-contact .co-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-contact .co-step {
  position: relative;
  padding-top: 20px;
  border-top: 1px solid var(--line-dark);
  transition: border-color 0.24s var(--ease);
}

.page-contact .co-step::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

.page-contact .co-step:hover,
.page-contact .co-step:focus-within {
  border-top-color: var(--gold-2);
}

.page-contact .co-step-num {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lake-2);
}

.page-contact .co-step h3 {
  margin: 0 0 8px;
  font-size: clamp(1.02rem, 1.5vw, 1.16rem);
  font-weight: 600;
  color: var(--pearl);
}

.page-contact .co-step p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--lake-2);
}

.page-contact .co-step .co-step-time {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--gold-2);
}

.page-contact .co-process .co-figure figcaption {
  color: var(--lake-2);
}

/* ---------- 快捷入口 ---------- */
.page-contact .co-more .section-head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .co-quick-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .co-quick {
  display: block;
  padding: 20px 22px;
  background: var(--pearl);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lake);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--graphite);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-contact .co-quick:hover,
.page-contact .co-quick:focus-visible {
  transform: translateY(-2px);
  border-left-color: var(--gold);
  box-shadow: var(--shadow-1);
}

.page-contact .co-quick-key {
  display: block;
  margin-bottom: 9px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lake);
}

.page-contact .co-quick-title {
  display: block;
  margin-bottom: 7px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
}

.page-contact .co-quick-desc {
  display: block;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-contact .co-quick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 22px;
  }

  .page-contact .co-step {
    padding-right: 6px;
  }

  .page-contact .co-steps .co-step + .co-step {
    padding-left: 22px;
  }

  .page-contact .co-steps .co-step + .co-step::before {
    left: 22px;
  }
}

@media (min-width: 960px) {
  .page-contact .co-grid {
    grid-template-columns: minmax(300px, 4fr) minmax(0, 8fr);
  }

  .page-contact .co-aside {
    position: sticky;
    top: var(--co-aside-top);
    align-self: start;
  }
}

/* ---------- 窄屏适配 ---------- */
@media (max-width: 899px) {
  .page-contact .co-hero::before {
    top: auto;
    bottom: 0;
    right: -10%;
    width: 150%;
    height: 92px;
    clip-path: polygon(7% 0, 100% 0, 100% 100%, 0 100%);
  }

  .page-contact .co-hero::after {
    display: none;
  }

  .page-contact .co-hero-inner {
    padding-bottom: 26px;
  }
}

@media (max-width: 640px) {
  .page-contact .co-spec {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-contact .co-spec dd {
    margin-bottom: 12px;
  }

  .page-contact .co-table-wrap {
    border-top: 1px solid var(--ink);
  }

  .page-contact .co-table,
  .page-contact .co-table tbody,
  .page-contact .co-table tr,
  .page-contact .co-table td {
    display: block;
    width: 100%;
  }

  .page-contact .co-table thead {
    display: none;
  }

  .page-contact .co-table tr {
    padding: 14px 0;
    border-top: 1px solid var(--line);
  }

  .page-contact .co-table td {
    padding: 3px 0;
    border-top: 0;
    white-space: normal;
  }

  .page-contact .co-table td::before {
    display: block;
    margin-bottom: 2px;
    font-size: 11.5px;
    letter-spacing: 0.08em;
    color: var(--mist);
  }

  .page-contact .co-table td:nth-child(1)::before {
    content: "交付物";
  }

  .page-contact .co-table td:nth-child(2)::before {
    content: "具体内容";
  }

  .page-contact .co-table td:nth-child(3)::before {
    content: "节奏";
  }

  .page-contact .co-table td:nth-child(2) {
    margin-bottom: 8px;
  }

  .page-contact .co-table td:last-child {
    white-space: normal;
  }

  .page-contact .co-dir > summary {
    padding-right: 34px;
  }

  .page-contact .co-dir-body {
    padding-left: 0;
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-quick,
  .page-contact .co-copy,
  .page-contact .co-step,
  .page-contact .co-dir > summary::after {
    transition: none;
  }

  .page-contact .co-quick:hover,
  .page-contact .co-quick:focus-visible {
    transform: none;
  }
}