.page-contact {
  --pc-stripe: 3px;
  --pc-flow-gap: 22px;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  margin-top: 96px;
}
.page-contact .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13.5px;
  color: var(--warm);
}
.page-contact .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.page-contact .crumbs a {
  color: var(--warm);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.page-contact .crumbs a:hover {
  color: var(--coral);
  border-color: var(--coral);
}
.page-contact .crumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: 36px;
  margin-top: 28px;
}
.page-contact .contact-hero__text .display,
.page-contact .contact-hero__text h1 {
  margin: 14px 0 0;
  font-size: 40px;
  line-height: 1.12;
  letter-spacing: 0.02em;
  font-weight: 800;
  color: var(--deep);
}
.page-contact .contact-hero__text .lede {
  margin-top: 18px;
  max-width: 46ch;
}
.page-contact .contact-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-contact .contact-hero__aside {
  position: relative;
  padding-top: 34px;
}
.page-contact .contact-hero__aside .rot-note {
  position: absolute;
  top: 0;
  right: 0;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--coral);
  transform-origin: 100% 0;
  transform: rotate(90deg) translateX(100%);
  white-space: nowrap;
}

/* ---------- 渠道胶囊 ---------- */
.page-contact .contact-channels {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 26px;
}
.page-contact .channel {
  position: relative;
  display: flex;
  background: var(--card);
  transition: background var(--t-fast) var(--ease);
}
.page-contact .channel__bar {
  flex: 0 0 0;
  width: 0;
  background: var(--coral);
  transition: width var(--t-mid) var(--ease);
}
.page-contact .channel:hover .channel__bar,
.page-contact .channel:focus-within .channel__bar {
  width: var(--pc-stripe);
  flex-basis: var(--pc-stripe);
}
.page-contact .channel__body {
  flex: 1 1 auto;
  min-width: 0;
  padding: 22px 20px 24px;
}
.page-contact .channel__title {
  margin: 10px 0 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--deep);
}
.page-contact .channel__value {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}
.page-contact .channel .copy-btn {
  margin-top: 10px;
}
.page-contact .channel__meta {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
}
.page-contact .channel__meta div {
  display: grid;
  gap: 3px;
}
.page-contact .channel__meta dt {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--warm);
}
.page-contact .channel__meta dd {
  margin: 0;
  color: var(--ink);
}
.page-contact .contact-note {
  margin-top: 20px;
  max-width: 74ch;
}

/* ---------- 邮件结构 ---------- */
.page-contact .mail-split {
  align-items: start;
  gap: 28px;
  margin-top: 24px;
}
.page-contact .mail-doc {
  background: var(--deep);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.page-contact .mail-doc__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.page-contact .mail-doc__chip {
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--amber);
}
.page-contact .mail-doc__sub {
  font-size: 12.5px;
  color: rgba(247, 243, 236, 0.62);
}
.page-contact .mail-part {
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.page-contact .mail-part:last-child {
  border-bottom: 0;
}
.page-contact .mail-part__head {
  display: grid;
  grid-template-columns: 34px 1fr;
  grid-template-areas:
    "no label"
    "no hint";
  gap: 2px 10px;
  align-items: center;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  transition: background var(--t-fast) var(--ease);
}
.page-contact .mail-part__head::-webkit-details-marker {
  display: none;
}
.page-contact .mail-part__head:hover {
  background: rgba(255, 90, 54, 0.14);
}
.page-contact .mail-part__head::after {
  content: "+";
  justify-self: end;
  grid-column: 2;
  font-size: 18px;
  color: var(--amber);
  align-self: start;
}
.page-contact .mail-part[open] .mail-part__head::after {
  content: "–";
}
.page-contact .mail-part__no {
  grid-area: no;
  font-size: 15px;
  font-weight: 800;
  color: var(--coral);
}
.page-contact .mail-part__label {
  grid-area: label;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.page-contact .mail-part__hint {
  grid-area: hint;
  font-size: 12.5px;
  color: rgba(247, 243, 236, 0.6);
}
.page-contact .mail-part__body {
  margin: 0;
  padding: 0 18px 16px 62px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 243, 236, 0.86);
}

/* ---------- 示例侧栏 ---------- */
.page-contact .mail-side {
  border-top: 2px solid var(--coral);
  padding-top: 18px;
}
.page-contact .mail-side__title {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 800;
  color: var(--deep);
}
.page-contact .mail-sample {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 13px 15px;
  margin-bottom: 10px;
}
.page-contact .mail-sample__key {
  margin: 0 0 5px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--warm);
}
.page-contact .mail-sample__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 2px solid var(--amber);
  padding-bottom: 6px;
}
.page-contact .mail-side .note {
  margin: 14px 0;
}

/* ---------- 流程带 ---------- */
.page-contact .flow-band {
  position: relative;
  display: grid;
  gap: var(--pc-flow-gap);
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .flow-node {
  position: relative;
  padding-left: 42px;
}
.page-contact .flow-node::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 20px;
  bottom: calc(-1 * var(--pc-flow-gap));
  width: 1px;
  background: var(--line);
}
.page-contact .flow-node:last-child::before {
  display: none;
}
.page-contact .flow-node__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 23px;
  height: 23px;
  border: 1px solid var(--coral);
  background: var(--paper);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.page-contact .flow-node:hover .flow-node__dot,
.page-contact .flow-node:focus-within .flow-node__dot {
  background: var(--coral);
}
.page-contact .flow-node__no {
  display: block;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--warm);
}
.page-contact .flow-node__title {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--deep);
}
.page-contact .flow-node__when {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--coral);
}
.page-contact .flow-node__desc {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--warm);
  max-width: 42ch;
}
.page-contact .flow-figure {
  margin: 34px 0 0;
}

/* ---------- 合作建议 ---------- */
.page-contact .coop-grid {
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.16);
  margin-top: 24px;
}
.page-contact .coop-card {
  background: var(--deep);
  padding: 22px 20px 26px;
}
.page-contact .coop-card .dossier__no {
  margin: 0;
  font-size: 30px;
  font-weight: 800;
  color: var(--amber);
  line-height: 1;
}
.page-contact .coop-card__title {
  margin: 12px 0 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--paper);
}
.page-contact .coop-card__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 243, 236, 0.82);
}
.page-contact .coop-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.page-contact .coop-foot__text {
  margin: 0;
  font-size: 14.5px;
  color: rgba(247, 243, 236, 0.78);
  flex: 1 1 260px;
}

/* ---------- 地址与自查 ---------- */
.page-contact .contact-tail__split {
  align-items: start;
  gap: 30px;
}
.page-contact .contact-tail__main .data-list {
  margin-top: 22px;
}
.page-contact .contact-tail__main .data-list__val {
  word-break: break-word;
}
.page-contact .contact-tail__side {
  background: var(--soft);
  border: 1px solid var(--line);
  padding: 22px 20px 24px;
}
.page-contact .contact-tail__side-title {
  margin: 0 0 14px;
  font-size: 19px;
  font-weight: 800;
  color: var(--deep);
}
.page-contact .contact-tail__side .note {
  margin: 14px 0 0;
}

/* ---------- 下一步 ---------- */
.page-contact .contact-next__inner {
  display: grid;
  gap: 22px;
  border-top: 2px solid var(--ink);
  padding-top: 26px;
}
.page-contact .contact-next__title {
  margin: 10px 0 0;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--deep);
}
.page-contact .contact-next .lede {
  margin-top: 12px;
  max-width: 52ch;
}
.page-contact .contact-next__acts {
  display: grid;
  gap: 10px;
  align-content: start;
}
.page-contact .contact-next__acts .text-link {
  font-size: 15px;
}

/* ---------- 复制按钮的薄荷绿反馈 ---------- */
.page-contact .copy-btn.is-done,
.page-contact .copy-btn.is-on {
  border-color: var(--mint);
  color: var(--mint-ink);
  box-shadow: 0 0 0 2px rgba(47, 191, 155, 0.28);
}
.page-contact .checklist__btn.is-on {
  background: var(--mint);
  border-color: var(--mint);
  color: #ffffff;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .contact-channels {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-contact .contact-next__inner {
    grid-template-columns: 1.2fr 1fr;
    align-items: start;
  }
  .page-contact .contact-next__acts {
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-contact .crumbs {
    margin-top: 116px;
  }
  .page-contact .contact-hero {
    grid-template-columns: 0.95fr 1.05fr;
    align-items: center;
    gap: 52px;
    margin-top: 34px;
  }
  .page-contact .contact-hero__text h1 {
    font-size: 56px;
  }
  .page-contact .contact-hero__aside {
    padding-top: 46px;
  }
  .page-contact .contact-channels {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-contact .mail-split {
    gap: 44px;
  }
  .page-contact .flow-band {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
  .page-contact .flow-node {
    padding-left: 0;
    padding-top: 46px;
  }
  .page-contact .flow-node::before {
    left: 22px;
    right: calc(-1 * 24px);
    top: 11px;
    bottom: auto;
    width: auto;
    height: 1px;
  }
  .page-contact .flow-node:last-child::before {
    display: block;
    right: 0;
    background: linear-gradient(90deg, var(--line), transparent);
  }
  .page-contact .flow-node__dot {
    top: 0;
  }
  .page-contact .contact-tail__split {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
  }
}

@media (min-width: 1080px) {
  .page-contact .contact-hero__text h1 {
    font-size: 62px;
  }
  .page-contact .coop-card {
    padding: 26px 24px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel__bar,
  .page-contact .flow-node__dot,
  .page-contact .mail-part__head {
    transition: none;
  }
  .page-contact .mail-part__head:hover {
    background: transparent;
  }
}
</main>