.page-contact {
  --pc-cut: 22px;
  background: var(--mist);
  color: var(--ink);
}

/* ---------- Hero ---------- */
.page-contact .contact-hero {
  position: relative;
  background: var(--sea-900);
  color: var(--mist);
  padding: 28px 0 0;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -25% -10% 35% 40%;
  background: radial-gradient(circle at 35% 45%, rgba(224, 179, 87, 0.22), transparent 62%);
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  padding-bottom: 34px;
}

.page-contact .contact-hero .crumbs__list {
  color: rgba(230, 236, 241, 0.6);
}

.page-contact .contact-hero .crumbs__link {
  color: rgba(230, 236, 241, 0.78);
}

.page-contact .contact-hero .crumbs__link:hover {
  color: var(--gold);
}

.page-contact .contact-hero__kicker {
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-size: clamp(28px, 5.8vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.page-contact .contact-hero__lede {
  margin: 20px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(230, 236, 241, 0.78);
}

.page-contact .contact-hero__frame {
  position: relative;
  z-index: 1;
  margin: 0;
  aspect-ratio: 15 / 8;
  overflow: hidden;
  background: linear-gradient(155deg, var(--sea-800), var(--sea-900));
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
}

.page-contact .contact-hero__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.92;
}

.page-contact .contact-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(96deg, rgba(11, 34, 57, 0.62) 0%, rgba(11, 34, 57, 0.1) 52%, rgba(224, 179, 87, 0.18) 100%);
  pointer-events: none;
}

/* ---------- Section shell ---------- */
.page-contact .pc-section {
  padding: 56px 0;
}

.page-contact .pc-section--paper {
  background: var(--paper);
}

.page-contact .pc-section--deep {
  background: var(--sea-900);
  color: var(--mist);
}

.page-contact .sec-head {
  margin-bottom: 30px;
  padding-left: 18px;
  border-left: 3px solid var(--gold);
}

.page-contact .sec-head__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-contact .sec-head__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.3;
  color: var(--ink);
}

.page-contact .sec-head__desc {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 合作方向 ---------- */
.page-contact .dir-grid {
  display: grid;
  gap: 18px;
}

.page-contact .dir-card {
  position: relative;
  padding: 26px 24px 22px 28px;
  background: var(--paper);
  box-shadow: 0 1px 0 var(--line-soft), 0 10px 26px rgba(11, 34, 57, 0.05);
  clip-path: polygon(0 0, calc(100% - var(--pc-cut)) 0, 100% var(--pc-cut), 100% 100%, 0 100%);
  transition: transform 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-contact .dir-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--gold), rgba(224, 179, 87, 0.25));
}

.page-contact .dir-card:hover,
.page-contact .dir-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px rgba(11, 34, 57, 0.14);
}

.page-contact .dir-card:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

.page-contact .dir-card__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold-deep);
}

.page-contact .dir-card__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-size: 20px;
  line-height: 1.35;
  color: var(--ink);
}

.page-contact .dir-card__fit {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--foam);
}

.page-contact .dir-card__body {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .dir-card__more {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  opacity: 0;
  transition: grid-template-rows 280ms var(--ease), opacity 220ms var(--ease);
}

.page-contact .dir-card:hover .dir-card__more,
.page-contact .dir-card:focus-within .dir-card__more {
  grid-template-rows: 1fr;
  opacity: 1;
}

.page-contact .dir-card__moreInner {
  min-height: 0;
  padding-top: 16px;
  margin-top: 16px;
  border-top: 1px dashed var(--line-soft);
}

.page-contact .dir-card__moreLabel {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-deep);
}

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

.page-contact .dir-card__moreList li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .dir-card__moreList li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 7px;
  background: var(--gold);
  transform: rotate(45deg);
}

/* ---------- 合作流程 ---------- */
.page-contact .flow__rail {
  display: grid;
  gap: 10px;
  margin: 0 0 30px;
  padding: 0;
}

.page-contact .flow__node {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 18px;
  background: var(--mist);
  border-left: 3px solid rgba(224, 179, 87, 0.4);
  text-decoration: none;
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .flow__node:hover,
.page-contact .flow__node:focus-visible {
  background: var(--mist-deep);
  border-left-color: var(--gold);
}

.page-contact .flow__node:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

.page-contact .flow__num {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold-deep);
}

.page-contact .flow__name {
  font-family: var(--font-head);
  font-size: 15px;
  color: var(--ink);
}

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

.page-contact .flow__detail {
  padding: 22px 22px 20px;
  background: var(--mist);
  border-left: 3px solid var(--sea-800);
  scroll-margin-top: 130px;
}

.page-contact .flow__detailTitle {
  margin: 0;
  font-family: var(--font-head);
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink);
}

.page-contact .flow__detailTitle .mono {
  margin-right: 8px;
  font-size: 15px;
  color: var(--gold-deep);
}

.page-contact .flow__detailText {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .flow__prep {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .flow__prep b {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 材料清单 ---------- */
.page-contact .material-grid {
  display: grid;
  gap: 20px;
}

.page-contact .material-col {
  padding: 28px 26px 24px;
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-contact .material-col__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 19px;
  line-height: 1.4;
  color: var(--ink);
}

.page-contact .material-col__note {
  margin: 8px 0 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .check-list li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .check-list li::before {
  content: "";
  width: 11px;
  height: 11px;
  margin-top: 8px;
  border: 2px solid var(--gold);
  transform: rotate(45deg);
}

.page-contact .material-note {
  margin: 26px 0 0;
  max-width: 68ch;
  padding-left: 18px;
  border-left: 2px solid var(--foam);
  font-size: 14px;
  line-height: 1.9;
  color: var(--slate);
}

/* ---------- 联系渠道 ---------- */
.page-contact .channels {
  display: grid;
  gap: 30px;
}

.page-contact .channel-list {
  display: grid;
  gap: 16px;
}

.page-contact .channel {
  padding: 22px 24px 22px 26px;
  background: var(--mist);
  border-left: 4px solid var(--gold);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-contact .channel__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-contact .channel__value {
  display: block;
  width: 100%;
  margin: 12px 0 0;
  padding: 0;
  border: 0;
  background: none;
  text-align: left;
  font-family: var(--font-mono);
  font-size: clamp(15px, 3.6vw, 20px);
  line-height: 1.45;
  color: var(--sea-900);
  word-break: break-word;
  cursor: pointer;
  transition: color 180ms var(--ease);
}

.page-contact .channel__value:hover {
  color: var(--gold-deep);
}

.page-contact .channel__value:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

.page-contact .channel__value::after {
  content: "点击复制";
  display: block;
  margin-top: 8px;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-contact .channel__value[data-copied]::after {
  content: "已复制到剪贴板";
  color: var(--foam);
}

.page-contact .channel__value--static {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 500;
  cursor: default;
}

.page-contact .channel__value--static:hover {
  color: var(--sea-900);
}

.page-contact .channel__value--static::after {
  content: none;
}

.page-contact .channel__value--address {
  font-size: 15px;
  line-height: 1.8;
}

.page-contact .channel__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .channel-visual {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(155deg, var(--sea-800), var(--sea-900));
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-contact .channel-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .channel-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 34, 57, 0.05) 40%, rgba(11, 34, 57, 0.72) 100%);
  pointer-events: none;
}

.page-contact .channel-visual__caption {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 20px;
  z-index: 1;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(248, 250, 252, 0.88);
}

/* ---------- 响应节奏 ---------- */
.page-contact .rhythm__title {
  margin: 0 0 26px;
  font-family: var(--font-head);
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.35;
  color: #ffffff;
}

.page-contact .rhythm__grid {
  display: grid;
  gap: 0;
}

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

.page-contact .rhythm__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.1;
  color: var(--gold);
  white-space: nowrap;
}

.page-contact .rhythm__label {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(230, 236, 241, 0.7);
}

.page-contact .rhythm__note {
  margin: 30px 0 0;
  max-width: 70ch;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(230, 236, 241, 0.72);
}

/* ---------- 常见问题 ---------- */
.page-contact .faq {
  border-top: 1px solid var(--line-soft);
}

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

.page-contact .faq__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
}

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

.page-contact .faq__q::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--gold-deep);
  transition: transform 220ms var(--ease);
}

.page-contact .faq__item[open] .faq__q::after {
  content: "−";
}

.page-contact .faq__q:hover {
  color: var(--sea-800);
}

.page-contact .faq__a {
  margin: 0 0 22px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate);
}

.page-contact .faq__more {
  margin: 28px 0 0;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.9;
  color: var(--slate);
}

.page-contact .faq__more a {
  color: var(--sea-800);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 4px;
}

.page-contact .faq__more a:hover {
  color: var(--gold-deep);
}

.page-contact .faq__more a:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .pc-section {
    padding: 82px 0;
  }

  .page-contact .sec-head {
    margin-bottom: 40px;
  }

  .page-contact .flow__rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    background: var(--mist);
    margin-bottom: 34px;
  }

  .page-contact .flow__node {
    background: transparent;
    border-left: 0;
    border-top: 3px solid rgba(224, 179, 87, 0.28);
    padding: 18px 18px 16px;
  }

  .page-contact .flow__node:nth-child(1) {
    border-top-color: var(--gold);
  }

  .page-contact .flow__node:nth-child(2) {
    border-top-color: rgba(224, 179, 87, 0.68);
  }

  .page-contact .flow__node:nth-child(3) {
    border-top-color: rgba(224, 179, 87, 0.44);
  }

  .page-contact .flow__node:hover,
  .page-contact .flow__node:focus-visible {
    background: var(--mist-deep);
    border-left-color: transparent;
  }

  .page-contact .flow__details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }

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

  .page-contact .rhythm__cell {
    padding: 26px 26px 6px 0;
    border-top: 0;
    border-left: 1px solid var(--line-dark);
    padding-left: 26px;
  }

  .page-contact .rhythm__cell:first-child {
    border-left: 0;
    padding-left: 0;
  }
}

@media (min-width: 860px) {
  .page-contact .dir-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .material-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
  }
}

@media (min-width: 960px) {
  .page-contact .channels {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact .channel-visual {
    aspect-ratio: 9 / 11;
  }
}

@media (hover: none) {
  .page-contact .dir-card__more {
    grid-template-rows: 1fr;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .dir-card,
  .page-contact .dir-card__more,
  .page-contact .flow__node,
  .page-contact .faq__q::after {
    transition: none;
  }

  .page-contact .dir-card:hover,
  .page-contact .dir-card:focus-within {
    transform: none;
  }
}