.page-contact {
  --contact-pad: clamp(56px, 9vh, 112px);
  background: var(--turf);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.page-contact .section {
  padding: var(--contact-pad) 0;
  position: relative;
}

.page-contact h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 52px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  color: var(--paper);
}

.page-contact h3 {
  margin: 0;
  font-size: 19px;
  line-height: 1.4;
  color: var(--paper);
}

.page-contact .section-head p:not(.kicker) {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: 17px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(40px, 7vh, 88px) 0 clamp(48px, 8vh, 96px);
  border-bottom: 1px solid var(--hair);
  background:
    radial-gradient(120% 90% at 92% 6%, rgba(198, 255, 0, 0.13), transparent 62%),
    linear-gradient(165deg, var(--turf) 0%, var(--turf-deep) 78%);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.page-contact .contact-hero__title {
  font-family: var(--font-head);
  font-size: clamp(40px, 7.2vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.025em;
  margin: 16px 0 0;
  max-width: 15ch;
  color: var(--paper);
}

.page-contact .contact-hero__intro {
  margin: 22px 0 0;
  max-width: 58ch;
  color: var(--mist);
  font-size: 17px;
}

.page-contact .contact-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__panel {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  background: linear-gradient(180deg, rgba(18, 80, 60, 0.92), rgba(8, 40, 31, 0.96));
  border: 1px solid var(--hair-strong);
  border-top: 3px solid var(--lime);
  box-shadow: -16px 20px 0 -10px rgba(8, 40, 31, 0.55);
}

.page-contact .contact-hero__panel-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lime);
}

.page-contact .contact-hero__panel-title {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-contact .contact-hero__panel-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--hair);
  display: grid;
  gap: 14px;
}

.page-contact .contact-hero__panel-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .contact-hero__panel-list strong {
  color: var(--paper);
  font-weight: 700;
}

.page-contact .contact-hero__panel-num {
  font-size: 14px;
  line-height: 1.9;
  color: var(--copper-bright);
}

/* ---------- 章节条 ---------- */
.page-contact .contact-index {
  position: sticky;
  top: calc(var(--header-h) + 6px);
  z-index: 20;
  background: rgba(8, 40, 31, 0.94);
  border-bottom: 1px solid var(--hair);
}

.page-contact .contact-index .scale-rail {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 10px var(--gutter);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-contact .contact-index .scale-rail::-webkit-scrollbar {
  display: none;
}

.page-contact .contact-index .scale-link {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 7px 14px;
  border: 1px solid var(--hair);
  border-radius: var(--pill);
  color: var(--mist);
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-contact .contact-index .scale-link:hover {
  color: var(--lime);
  border-color: var(--lime);
}

.page-contact .contact-index .scale-link[data-current] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--turf-deep);
}

/* ---------- 三种联络方式 ---------- */
.page-contact .contact-channels {
  position: relative;
  overflow: hidden;
  background: var(--turf-deep);
}

.page-contact .contact-channels__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-contact .contact-channels__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.4;
  filter: saturate(0.5) brightness(0.72);
}

.page-contact .contact-channels::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(8, 40, 31, 0.92) 0%, rgba(11, 61, 46, 0.86) 45%, rgba(8, 40, 31, 0.96) 100%);
}

.page-contact .contact-channels__inner {
  position: relative;
  z-index: 2;
}

.page-contact .contact-grid {
  margin-top: clamp(32px, 5vw, 56px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--hair-strong);
}

.page-contact .contact-card {
  position: relative;
  padding: clamp(24px, 3vw, 36px) clamp(16px, 2vw, 28px);
  border-bottom: 1px solid var(--hair);
  transition: background 0.35s var(--ease);
}

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

.page-contact .contact-card__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-contact .contact-card__label::after {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin-top: 12px;
  background: var(--lime);
}

.page-contact .contact-card__title {
  margin: 14px 0 0;
  font-size: 20px;
}

.page-contact .contact-card__value {
  margin: 12px 0 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.5;
  color: var(--copper-bright);
  word-break: break-all;
}

.page-contact .contact-card__desc {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--mist);
}

.page-contact .contact-card__note {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-soft);
  border-left: 1px solid var(--hair);
  transition: max-height 0.4s var(--ease), opacity 0.3s var(--ease), margin 0.4s var(--ease), padding 0.4s var(--ease);
}

.page-contact .contact-card:hover .contact-card__note,
.page-contact .contact-card:focus-within .contact-card__note {
  max-height: 240px;
  opacity: 1;
  margin-top: 16px;
  padding-left: 14px;
}

/* ---------- 来信处理 ---------- */
.page-contact .contact-letters {
  background: var(--turf);
}

.page-contact .contact-letters__list {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  border-top: 1px solid var(--hair-strong);
}

.page-contact .contact-letters__item {
  display: grid;
  gap: 12px;
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--hair);
  transition: background 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.page-contact .contact-letters__num {
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-contact .contact-letters__body p {
  margin: 10px 0 0;
  max-width: 74ch;
  font-size: 16px;
  color: var(--mist);
}

.page-contact .contact-letters__item > .tag {
  justify-self: start;
}

/* ---------- 回复节奏 ---------- */
.page-contact .contact-reply {
  background: var(--turf-deep);
}

.page-contact .contact-steps {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0 0 0 clamp(18px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-left: 1px solid var(--hair);
}

.page-contact .contact-steps__item {
  position: relative;
  padding: clamp(18px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--hair);
}

.page-contact .contact-steps__item:last-child {
  border-bottom: none;
}

.page-contact .contact-steps__index {
  display: inline-block;
  padding: 3px 9px;
  background: var(--lime);
  color: var(--turf-deep);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-contact .contact-steps__item h3 {
  margin: 14px 0 0;
}

.page-contact .contact-steps__item p {
  margin: 10px 0 0;
  font-size: 15.5px;
  color: var(--mist);
}

.page-contact .contact-reply__tip {
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(22px, 3vw, 32px);
  background: rgba(184, 115, 51, 0.14);
  border-left: 3px solid var(--copper);
}

.page-contact .contact-reply__tip-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--copper-bright);
}

.page-contact .contact-reply__tip-text {
  margin: 10px 0 0;
  max-width: 78ch;
  font-size: 16px;
  color: var(--paper);
}

/* ---------- 合作方向 ---------- */
.page-contact .contact-coop {
  background: var(--turf);
}

.page-contact .contact-coop__scroll {
  margin-top: clamp(32px, 5vw, 56px);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 14px;
  scroll-snap-type: x proximity;
}

.page-contact .contact-coop__scroll::-webkit-scrollbar {
  height: 4px;
}

.page-contact .contact-coop__scroll::-webkit-scrollbar-thumb {
  background: var(--hair-strong);
}

.page-contact .coop-card {
  flex: 0 0 min(306px, 78vw);
  scroll-snap-align: start;
  padding: 22px;
  background: var(--turf-line);
  border: 1px solid var(--hair);
  border-top: 3px solid var(--copper);
}

.page-contact .coop-card__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

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

.page-contact .coop-card__summary::after {
  content: "+";
  font-family: var(--font-num);
  font-size: 18px;
  color: var(--lime);
}

.page-contact .coop-card[open] .coop-card__summary::after {
  content: "−";
}

.page-contact .coop-card p {
  margin: 14px 0 0;
  font-size: 15px;
  color: var(--mist);
}

.page-contact .contact-coop__figure {
  margin: clamp(30px, 4vw, 48px) 0 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--hair);
}

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

/* ---------- 收束 ---------- */
.page-contact .contact-next {
  border-top: 1px solid var(--hair-strong);
  background: linear-gradient(135deg, var(--turf-deep) 0%, var(--turf) 100%);
}

.page-contact .contact-next__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-contact .contact-next__text p:not(.kicker) {
  margin: 14px 0 0;
  max-width: 56ch;
  color: var(--mist);
}

.page-contact .contact-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

  .page-contact .contact-card {
    border-bottom: none;
    border-right: 1px solid var(--hair);
  }

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

  .page-contact .contact-card:last-child {
    border-right: none;
  }

  .page-contact .contact-letters__item {
    grid-template-columns: 64px minmax(0, 1fr) auto;
    gap: clamp(18px, 3vw, 40px);
    align-items: start;
  }

  .page-contact .contact-letters__item > .tag {
    justify-self: end;
  }

  .page-contact .contact-letters__item:hover {
    padding-left: 14px;
    background: linear-gradient(90deg, rgba(18, 80, 60, 0.55), transparent 72%);
  }

  .page-contact .contact-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 940px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(300px, 0.88fr);
    align-items: end;
  }

  .page-contact .contact-hero__panel {
    transform: rotate(1.8deg);
  }
}

@media (min-width: 900px) {
  .page-contact .contact-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding-left: 0;
    border-left: none;
  }

  .page-contact .contact-steps__item {
    border-bottom: none;
    border-left: 1px solid var(--hair);
    padding: 34px 26px;
  }

  .page-contact .contact-steps__item:first-child {
    border-left: none;
    padding-left: 0;
  }
}