.page-contact {
  --c-stack: clamp(2.75rem, 6vw, 4.5rem);
  --c-gap: clamp(1.5rem, 3.4vw, 3rem);
  --c-hairline: rgba(14, 27, 42, .15);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 首屏 ---------- */
.page-contact .c-hero {
  position: relative;
  padding: clamp(2.25rem, 5vw, 4.25rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .c-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: clamp(90px, 24vw, 300px);
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--gold-deep) 0 1px, transparent 1px 14px);
  opacity: .55;
}

.page-contact .c-hero__crumb {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .c-hero__kicker {
  font-size: .8125rem;
  letter-spacing: .16em;
  color: var(--gold-deep);
  margin: 0 0 .75rem;
}

.page-contact .c-hero__title {
  font-family: var(--font-head);
  font-size: var(--fs-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--ink);
  max-width: 17em;
  margin: 0 0 1.15rem;
}

.page-contact .c-hero__lede {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
  margin: 0;
}

.page-contact .c-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem clamp(1rem, 3vw, 2.5rem);
  list-style: none;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line-soft);
  max-width: 46rem;
}

.page-contact .c-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: .45rem;
  font-size: .9375rem;
  color: var(--ink-soft);
}

.page-contact .c-hero__facts .mono {
  color: var(--gold-deep);
  font-weight: 600;
  letter-spacing: .04em;
}

/* ---------- 章节间距 ---------- */
.page-contact .c-kinds,
.page-contact .c-flow,
.page-contact .c-prep,
.page-contact .c-channel,
.page-contact .c-cases,
.page-contact .c-form {
  padding-top: var(--c-stack);
}

.page-contact .c-kinds__lede,
.page-contact .c-prep__lede {
  max-width: 42em;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
}

.page-contact .c-prep__lede {
  margin-bottom: 0;
}

/* ---------- 合作类型 ---------- */
.page-contact .c-kinds__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-contact .c-kind {
  display: flex;
  flex-direction: column;
  gap: .7rem;
  background: var(--shell);
  padding: clamp(1.35rem, 3vw, 2.15rem);
  transition: background .28s var(--ease), box-shadow .28s var(--ease);
}

.page-contact .c-kind:hover,
.page-contact .c-kind:focus-within {
  background: var(--gold-wash);
  box-shadow: inset 0 0 0 1px var(--gold-deep);
}

.page-contact .c-kind__num {
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--gold-deep);
  margin: 0;
}

.page-contact .c-kind__title {
  font-family: var(--font-head);
  font-size: 1.3125rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 0;
}

.page-contact .c-kind__who {
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0 0 .35rem;
}

.page-contact .c-kind__list {
  margin: 0;
  display: grid;
  gap: .9rem;
}

.page-contact .c-kind__row {
  display: grid;
  gap: .22rem;
  padding-top: .75rem;
  border-top: 1px solid var(--line-soft);
}

.page-contact .c-kind__row dt {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-contact .c-kind__row dd {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .c-kind__link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: .9rem;
  font-size: .875rem;
  color: var(--gold-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .c-kind__link::after {
  content: "→";
  margin-left: .35rem;
}

.page-contact .c-kind__link:hover,
.page-contact .c-kind__link:focus-visible {
  color: var(--ink);
  border-color: var(--ink);
}

/* ---------- 流程 ---------- */
.page-contact .c-flow__figure {
  margin: 0 0 clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-contact .c-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--shell);
  border: 1px solid var(--line);
}

.page-contact .c-flow__cap {
  margin-top: .75rem;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .c-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}

.page-contact .c-step {
  position: relative;
  padding: 1.35rem 0 1.5rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .c-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 2.25rem;
  height: 2px;
  background: var(--gold);
}

.page-contact .c-step__num {
  display: block;
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--gold-deep);
  margin-bottom: .5rem;
}

.page-contact .c-step__title {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 .3rem;
}

.page-contact .c-step__time {
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--mist);
  margin: 0 0 .55rem;
}

.page-contact .c-step__text {
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--text);
  margin: 0;
}

/* ---------- 提交准备 ---------- */
.page-contact .c-prep__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-contact .c-prep__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .c-prep__item {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: .3rem .75rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .c-prep__num {
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--gold-deep);
  padding-top: .25rem;
}

.page-contact .c-prep__title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
}

.page-contact .c-prep__note {
  grid-column: 2;
  margin: .1rem 0 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 联系通道 ---------- */
.page-contact .c-channel__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-contact .c-channel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .c-channel__item {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: .2rem .85rem;
  align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .c-channel__icon {
  grid-row: 1 / span 2;
  align-self: center;
  display: inline-flex;
  color: var(--gold-deep);
}

.page-contact .c-channel__label {
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-contact .c-channel__val {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .c-channel__note {
  margin: 1.35rem 0 0;
  padding: .9rem 1.1rem;
  background: var(--gold-wash);
  border-left: 3px solid var(--gold);
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .c-channel__figure {
  margin: 0;
}

.page-contact .c-channel__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--shell);
  border: 1px solid var(--line);
}

/* ---------- 常见情形 ---------- */
.page-contact .c-cases__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-contact .c-case {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  background: var(--paper);
  padding: clamp(1.25rem, 3vw, 1.8rem);
}

.page-contact .c-case__tag {
  align-self: flex-start;
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--gold-deep);
  border: 1px solid var(--line-gold);
  padding: .18rem .5rem;
  margin: 0;
}

.page-contact .c-case__title {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
}

.page-contact .c-case__text {
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
}

.page-contact .c-case__via {
  margin: auto 0 0;
  padding-top: .85rem;
  border-top: 1px solid var(--line-soft);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 表单 ---------- */
.page-contact .c-form__panel {
  position: relative;
  background: var(--shell);
  border: 1px solid var(--line);
  padding: clamp(1.5rem, 4vw, 3rem);
  max-width: 48rem;
}

.page-contact .c-form__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(60px, 18vw, 140px);
  height: 3px;
  background: var(--gold);
}

.page-contact .c-form__lede {
  max-width: 38em;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: clamp(1rem, 2.5vw, 1.5rem) 0 0;
}

.page-contact .c-form__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.1rem, 2.6vw, 1.5rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  max-width: 34rem;
}

.page-contact .c-field__label {
  display: block;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--ink-soft);
  margin-bottom: .5rem;
}

.page-contact .c-field__req {
  font-family: var(--font-body);
  font-size: .6875rem;
  letter-spacing: 0;
  color: var(--gold-deep);
  margin-left: .4rem;
}

.page-contact .c-field__input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: .8rem .9rem;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}

.page-contact .c-field__input::placeholder {
  color: var(--mist);
}

.page-contact .c-field__input:hover {
  border-color: var(--gold-deep);
}

.page-contact .c-field__input:focus {
  outline: none;
  background: var(--shell);
  border-color: var(--gold-deep);
  box-shadow: 0 0 0 2px var(--gold-wash);
}

.page-contact .c-field__select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 2.25rem;
  background-image: linear-gradient(45deg, transparent 50%, var(--gold-deep) 50%),
    linear-gradient(135deg, var(--gold-deep) 50%, transparent 50%);
  background-position: calc(100% - 18px) calc(50% + 1px), calc(100% - 12px) calc(50% + 1px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.page-contact .c-field__input--area {
  min-height: 8rem;
  resize: vertical;
  line-height: 1.75;
}

.page-contact .c-form__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .85rem 1.25rem;
  padding-top: clamp(1rem, 2.4vw, 1.4rem);
  border-top: 1px solid var(--line-soft);
}

.page-contact .c-form__submit {
  min-width: 9rem;
}

.page-contact .c-form__hint {
  flex: 1 1 14rem;
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .c-cases__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .c-flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(1rem, 2.5vw, 2rem);
  }
}

@media (min-width: 880px) {
  .page-contact .c-kinds__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .c-prep__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-contact .c-channel__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-contact .c-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 0;
  }

  .page-contact .c-step {
    padding: 1.6rem clamp(.9rem, 2vw, 1.6rem) 1.75rem 0;
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
  }

  .page-contact .c-step:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .c-kind,
  .page-contact .c-kind__link,
  .page-contact .c-field__input {
    transition: none;
  }
}