.page-contact {
  --contact-hair: rgba(15, 36, 56, 0.14);
  --contact-hair-soft: rgba(15, 36, 56, 0.08);
  --contact-card-bg: #ffffff;
  --contact-radius: 3px;
  --contact-step-line: rgba(15, 36, 56, 0.18);
}

/* ============ 首屏框景窗口 ============ */
.page-contact .contact-hero {
  padding-top: 10px;
}

.page-contact .contact-hero__window {
  position: relative;
  border: var(--line-hair);
  border-top: 3px solid var(--ink-deep);
  border-radius: var(--contact-radius);
  padding: 42px 20px 32px;
  background:
    radial-gradient(120% 150% at 90% -25%, rgba(60, 143, 123, 0.16), transparent 62%),
    radial-gradient(90% 120% at -5% 120%, rgba(255, 122, 51, 0.10), transparent 58%),
    var(--paper);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-contact .contact-hero__window::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 16px;
  right: 16px;
  height: 7px;
  background-image: repeating-linear-gradient(to right, rgba(15, 36, 56, 0.26) 0 1px, transparent 1px 15px);
  opacity: 0.75;
  pointer-events: none;
}

.page-contact .contact-hero__window::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(31, 95, 81, 0.14), transparent 68%);
  pointer-events: none;
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(29px, 6.2vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink-deep);
  max-width: 17em;
}

.page-contact .contact-hero__window .lede {
  margin-top: 18px;
  max-width: 46em;
  color: rgba(11, 20, 32, 0.76);
}

.page-contact .contact-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 26px 0 0;
}

.page-contact .contact-hero__jump a {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--celadon-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 95, 81, 0.32);
  padding-bottom: 2px;
  transition: color 0.24s var(--ease-out), border-color 0.24s var(--ease-out);
}

.page-contact .contact-hero__jump a:hover {
  color: var(--flare);
  border-color: var(--flare);
}

.page-contact .contact-hero__meta {
  margin: 22px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(15, 36, 56, 0.58);
  overflow-wrap: anywhere;
}

/* ============ 三类合作方向 ============ */
.page-contact .contact-lanes {
  display: grid;
  gap: 16px;
  margin-top: 26px;
  align-items: start;
}

.page-contact .contact-lane {
  position: relative;
  background: var(--contact-card-bg);
  border: var(--line-hair);
  border-radius: var(--contact-radius);
  padding: 26px 22px 28px;
  box-shadow: var(--shadow-1);
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.page-contact .contact-lane::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 58px;
  height: 2px;
  background: var(--celadon-light);
}

.page-contact .contact-lane:nth-child(2)::before {
  background: var(--flare);
  width: 40px;
}

.page-contact .contact-lane:nth-child(3)::before {
  background: var(--ink-deep);
  width: 76px;
}

.page-contact .contact-lane:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 95, 81, 0.42);
  box-shadow: var(--shadow-2);
}

.page-contact .contact-lane__tag {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: rgba(15, 36, 56, 0.46);
}

.page-contact .contact-lane__title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 21px;
  line-height: 1.4;
  color: var(--ink-deep);
}

.page-contact .contact-lane__text {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(11, 20, 32, 0.76);
}

.page-contact .contact-footnote {
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(15, 36, 56, 0.6);
}

.page-contact .contact-footnote a {
  color: var(--celadon-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 95, 81, 0.32);
}

.page-contact .contact-footnote a:hover {
  color: var(--flare);
  border-color: var(--flare);
}

/* ============ 配图 ============ */
.page-contact .contact-figure {
  margin: 28px 0 0;
  position: relative;
}

.page-contact .contact-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--line-hair);
  border-radius: var(--contact-radius);
  box-shadow: var(--shadow-1);
  background: var(--mist);
}

.page-contact .contact-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(15, 36, 56, 0.56);
}

.page-contact .contact-figure--scene {
  margin-top: 34px;
}

.page-contact .contact-figure--scene img {
  aspect-ratio: 14 / 9;
}

/* ============ 四步共建流程 ============ */
.page-contact .contact-flow {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: flow;
}

.page-contact .contact-flow__item {
  position: relative;
}

.page-contact .contact-flow__panel {
  border: var(--line-hair);
  border-radius: var(--contact-radius);
  background: var(--paper);
  padding: 14px 16px 16px;
  transition: border-color 0.28s var(--ease-out), background 0.28s var(--ease-out);
}

.page-contact .contact-flow__panel[open] {
  border-color: rgba(31, 95, 81, 0.4);
  background: #ffffff;
}

.page-contact .contact-flow__summary {
  display: flex;
  align-items: center;
  gap: 11px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .contact-flow__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 1px solid var(--ink-deep);
  color: var(--paper);
  font-size: 11.5px;
  position: relative;
  z-index: 1;
  transition: background 0.28s var(--ease-out), border-color 0.28s var(--ease-out);
}

.page-contact .contact-flow__panel[open] .contact-flow__num {
  background: var(--flare);
  border-color: var(--flare);
}

.page-contact .contact-flow__label {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--ink-deep);
}

.page-contact .contact-flow__desc {
  margin: 12px 0 0 39px;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(11, 20, 32, 0.74);
}

/* ============ 投稿区 ============ */
.page-contact .contact-submit {
  display: grid;
  gap: 24px;
}

.page-contact .contact-submit__aside .section-title {
  margin-top: 12px;
}

.page-contact .contact-submit__aside .lede {
  margin-top: 16px;
  color: rgba(11, 20, 32, 0.74);
}

.page-contact .contact-submit__cards {
  display: grid;
  gap: 14px;
}

.page-contact .contact-submit__card {
  border-left: 2px solid rgba(60, 143, 123, 0.5);
  background: rgba(255, 255, 255, 0.72);
  padding: 20px 20px 22px;
  border-radius: 0 var(--contact-radius) var(--contact-radius) 0;
}

.page-contact .contact-submit__card:nth-child(2) {
  border-left-color: rgba(255, 122, 51, 0.62);
}

.page-contact .contact-submit__card:nth-child(3) {
  border-left-color: rgba(15, 36, 56, 0.42);
}

.page-contact .contact-submit__label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--celadon-deep);
}

.page-contact .contact-submit__card p:last-child {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: rgba(11, 20, 32, 0.76);
}

/* ============ 商务深色面板 ============ */
.page-contact .biz-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(247, 245, 240, 0.14);
  border-radius: var(--contact-radius);
  padding: 34px 22px 30px;
  color: rgba(247, 245, 240, 0.8);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(31, 95, 81, 0.58), transparent 62%),
    radial-gradient(90% 110% at 0% 110%, rgba(255, 122, 51, 0.16), transparent 58%),
    var(--ink-deep);
  box-shadow: var(--shadow-2);
}

.page-contact .biz-panel__title {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(23px, 4.4vw, 36px);
  line-height: 1.24;
  color: var(--paper);
  max-width: 20em;
}

.page-contact .biz-panel__grid {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-contact .biz-panel__col h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 16px;
  color: var(--paper);
}

.page-contact .biz-panel__col p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.88;
  color: rgba(247, 245, 240, 0.76);
}

.page-contact .biz-panel a {
  color: var(--flare);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 51, 0.42);
}

.page-contact .biz-panel a:hover {
  border-color: var(--flare);
}

.page-contact .biz-panel__link {
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(247, 245, 240, 0.14);
  font-size: 13.5px;
  color: rgba(247, 245, 240, 0.66);
}

.page-contact .kicker--light {
  color: rgba(255, 122, 51, 0.9);
}

/* ============ 联系卡 ============ */
.page-contact .reach {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-contact .reach-card {
  border: var(--line-hair);
  border-radius: var(--contact-radius);
  background: var(--contact-card-bg);
  padding: 26px 22px 28px;
  box-shadow: var(--shadow-1);
}

.page-contact .reach-card--line {
  border: 1px solid rgba(60, 143, 123, 0.42);
  box-shadow: 0 0 0 3px rgba(60, 143, 123, 0.07), var(--shadow-1);
}

.page-contact .reach-card__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 19px;
  color: var(--ink-deep);
}

.page-contact .reach-lines {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .reach-line {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-bottom: 14px;
  border-bottom: var(--line-soft);
}

.page-contact .reach-line:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-contact .reach-line__label {
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: rgba(15, 36, 56, 0.5);
}

.page-contact .reach-line__value {
  font-family: var(--font-mono);
  font-size: 16.5px;
  letter-spacing: 0.01em;
  color: var(--ink-deep);
  overflow-wrap: anywhere;
}

.page-contact .reach-card__note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(11, 20, 32, 0.72);
}

.page-contact .reach-card__icp {
  margin: 22px 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(15, 36, 56, 0.5);
}

.page-contact .mail-card {
  position: relative;
  margin-top: 22px;
  padding-left: 26px;
}

.page-contact .mail-card::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  bottom: 2px;
  width: 6px;
  background-image: repeating-linear-gradient(to bottom, rgba(15, 36, 56, 0.3) 0 1px, transparent 1px 9px);
}

.page-contact .mail-card__addr {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-deep);
}

.page-contact .mail-card__hint {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(11, 20, 32, 0.7);
}

/* ============ 平板及以上 ============ */
@media (min-width: 720px) {
  .page-contact .contact-hero__window {
    padding: 56px 44px 44px;
  }

  .page-contact .contact-lanes {
    gap: 18px;
  }

  .page-contact .contact-submit__cards {
    gap: 16px;
  }

  .page-contact .biz-panel {
    padding: 44px 40px 40px;
  }

  .page-contact .biz-panel__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 26px 30px;
  }

  .page-contact .reach {
    gap: 20px;
  }

  .page-contact .reach-card {
    padding: 30px 28px 32px;
  }
}

/* ============ 桌面端 ============ */
@media (min-width: 940px) {
  .page-contact .contact-lanes {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .page-contact .contact-lane:nth-child(2) {
    margin-top: 28px;
  }

  .page-contact .contact-lane:nth-child(3) {
    margin-top: 12px;
  }

  .page-contact .contact-flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-top: 34px;
  }

  .page-contact .contact-flow__item {
    padding-right: 20px;
    border: none;
    background: none;
  }

  .page-contact .contact-flow__item::before {
    content: "";
    position: absolute;
    top: 14px;
    left: 32px;
    right: 6px;
    height: 1px;
    background: var(--contact-step-line);
    z-index: 0;
  }

  .page-contact .contact-flow__item:last-child::before {
    content: none;
  }

  .page-contact .contact-flow__panel {
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
  }

  .page-contact .contact-flow__panel[open] {
    background: transparent;
  }

  .page-contact .contact-flow__desc {
    margin: 14px 0 0 0;
    padding-right: 14px;
  }

  .page-contact .contact-submit {
    grid-template-columns: 0.95fr 1.25fr;
    gap: 42px;
    align-items: start;
  }

  .page-contact .biz-panel__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .reach {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: start;
    gap: 24px;
  }
}

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-lane,
  .page-contact .contact-flow__panel,
  .page-contact .contact-flow__num {
    transition: none;
  }

  .page-contact .contact-lane:hover {
    transform: none;
  }
}