.page-contact {
  --pc-line: rgba(30, 26, 23, .14);
  --pc-line-soft: rgba(30, 26, 23, .07);
  --pc-dark-line: rgba(244, 237, 227, .24);
  --pc-grid: rgba(30, 26, 23, .045);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 坐标索引 ---------- */
@media (min-width: 1280px) {
  .page-contact .coord-index {
    position: fixed;
    right: max(20px, calc((100vw - var(--wrap)) / 2 - 62px));
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
  }
}

/* ---------- 首屏 ---------- */
.page-contact .c-hero {
  position: relative;
  background: var(--pit);
  color: var(--paper);
  border-bottom: 6px solid var(--clay);
  overflow: hidden;
}

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

.page-contact .c-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
  filter: saturate(.4) contrast(1.08);
}

.page-contact .c-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(112deg, rgba(18, 16, 14, .97) 0%, rgba(18, 16, 14, .84) 48%, rgba(166, 58, 34, .52) 100%);
}

.page-contact .c-hero__inner {
  position: relative;
  z-index: 2;
  padding: 56px 0 52px;
}

.page-contact .c-hero__kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-contact .c-hero__kicker::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--clay-soft);
  flex: 0 0 auto;
}

.page-contact .c-hero h1 {
  margin: 20px 0 0;
  max-width: 16ch;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(32px, 5.4vw, 68px);
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-contact .c-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--pale-gold);
}

.page-contact .c-hero__channels {
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-contact .c-channel {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 18px 0;
  border-top: 1px solid var(--pc-dark-line);
}

.page-contact .c-channel:last-child {
  border-bottom: 1px solid var(--pc-dark-line);
}

.page-contact .c-channel__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-contact .c-channel__value {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(17px, 2.2vw, 24px);
  line-height: 1.4;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .c-channel__copy {
  margin-left: auto;
  flex: 0 0 auto;
  padding: 6px 13px;
  border: 1px solid rgba(244, 237, 227, .34);
  border-radius: 0;
  background: transparent;
  color: var(--pale-gold);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .c-channel__copy:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--pit);
}

.page-contact .c-channel__copy.is-copied {
  background: var(--celadon);
  border-color: var(--celadon);
  color: var(--paper);
}

@media (min-width: 880px) {
  .page-contact .c-hero__inner {
    padding: 76px 0 68px;
  }

  .page-contact .c-hero__channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 44px;
    margin-top: 48px;
  }

  .page-contact .c-channel {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    border-top-width: 2px;
  }

  .page-contact .c-channel__copy {
    margin-left: 0;
  }
}

/* ---------- 面包屑 ---------- */
.page-contact .c-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  border-bottom: 1px solid var(--pc-line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(30, 26, 23, .55);
}

.page-contact .c-crumb a {
  color: var(--tea);
  text-decoration: none;
}

.page-contact .c-crumb a:hover {
  color: var(--clay);
  text-decoration: underline;
}

.page-contact .c-crumb__sep {
  color: rgba(30, 26, 23, .28);
}

/* ---------- 正文底纹 ---------- */
.page-contact .c-body {
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, var(--pc-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--pc-grid) 1px, transparent 1px);
  background-size: 56px 56px;
}

/* ---------- 章节骨架 ---------- */
.page-contact .c-sec {
  padding: clamp(52px, 6.5vw, 92px) 0;
  border-bottom: 1px solid var(--pc-line-soft);
}

.page-contact .c-sec:last-child {
  border-bottom: 0;
}

.page-contact .c-sec__head {
  max-width: 800px;
}

.page-contact .c-sec__title {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(25px, 3.6vw, 44px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-contact .c-sec__note {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(30, 26, 23, .78);
}

.page-contact .c-sec__note a,
.page-contact .c-card__body a,
.page-contact .c-case__text a {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid rgba(166, 58, 34, .36);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .c-sec__note a:hover,
.page-contact .c-card__body a:hover,
.page-contact .c-case__text a:hover {
  color: var(--clay-soft);
  border-bottom-color: var(--clay-soft);
}

/* ---------- 01 两栏信息卡 ---------- */
.page-contact .c-cards {
  margin-top: 40px;
  border-top: 1px solid var(--pc-line);
}

.page-contact .c-card {
  display: grid;
  gap: 12px;
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .c-card__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--clay);
}

.page-contact .c-card__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.45;
  color: var(--ink);
}

.page-contact .c-card__body {
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(30, 26, 23, .8);
}

.page-contact .c-card__body p {
  margin: 0 0 12px;
}

.page-contact .c-card__body p:last-child {
  margin-bottom: 0;
}

.page-contact .c-subject {
  padding: 13px 16px;
  background: var(--sand);
  border-left: 3px solid var(--clay);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: anywhere;
}

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

  .page-contact .c-card {
    padding: 34px 40px 38px 0;
  }

  .page-contact .c-cards--two .c-card + .c-card {
    padding-left: 40px;
    padding-right: 0;
    border-left: 1px solid var(--pc-line);
  }
}

/* ---------- 02 三步流程 ---------- */
.page-contact .c-flow {
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .c-flow__step {
  position: relative;
  padding: 0 0 34px 28px;
}

.page-contact .c-flow__step::after {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--clay);
  transition: background .25s var(--ease);
}

.page-contact .c-flow__step::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 22px;
  bottom: 6px;
  width: 1px;
  background: var(--pc-line);
}

.page-contact .c-flow__step:last-child {
  padding-bottom: 0;
}

.page-contact .c-flow__step:last-child::before {
  display: none;
}

.page-contact .c-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-contact .c-flow__title {
  margin: 8px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.35;
  color: var(--tea);
}

.page-contact .c-flow__text {
  margin: 10px 0 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(30, 26, 23, .82);
}

.page-contact .c-flow__more {
  margin: 14px 0 0;
  max-width: 54ch;
  font-size: 14px;
  color: rgba(30, 26, 23, .7);
}

.page-contact .c-flow__more summary {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--clay);
  cursor: pointer;
  border-bottom: 1px solid rgba(166, 58, 34, .4);
  list-style: none;
}

.page-contact .c-flow__more summary::-webkit-details-marker {
  display: none;
}

.page-contact .c-flow__more summary::after {
  content: " +";
}

.page-contact .c-flow__more[open] summary::after {
  content: " –";
}

.page-contact .c-flow__more p {
  margin: 10px 0 0;
  line-height: 1.85;
}

@media (min-width: 900px) {
  .page-contact .c-flow {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 44px;
  }

  .page-contact .c-flow__step {
    padding: 34px 0 0;
    border-top: 1px solid var(--pc-line);
  }

  .page-contact .c-flow__step::before {
    display: none;
  }

  .page-contact .c-flow__step::after {
    left: 0;
    top: -5px;
  }
}

/* ---------- 03 常见对接 ---------- */
.page-contact .c-cases {
  margin-top: 40px;
}

.page-contact .c-case {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--pc-line);
  transition: transform .3s var(--ease);
}

.page-contact .c-cases__list .c-case:last-child {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .c-case__num {
  justify-self: start;
  padding: 4px 9px;
  background: var(--clay);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  transition: background .25s var(--ease), color .25s var(--ease);
}

.page-contact .c-case__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.4;
  color: var(--ink);
}

.page-contact .c-case__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(30, 26, 23, .8);
}

.page-contact .c-case:hover {
  transform: translateX(6px);
}

.page-contact .c-case:hover .c-case__num {
  background: var(--gold);
  color: var(--pit);
}

.page-contact .c-cases__media {
  margin: 32px 0 0;
}

.page-contact .c-cases__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--sand);
}

@media (min-width: 980px) {
  .page-contact .c-cases {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-contact .c-case {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 20px;
    align-items: baseline;
    padding: 26px 0;
  }

  .page-contact .c-case__num {
    grid-row: 1;
  }

  .page-contact .c-case__title {
    grid-column: 2;
    grid-row: 1;
  }

  .page-contact .c-case__text {
    grid-column: 2;
    grid-row: 2;
  }

  .page-contact .c-cases__media {
    margin: 0;
    position: sticky;
    top: 96px;
  }
}

/* ---------- 04 来件信息 ---------- */
.page-contact .c-intake {
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--pc-line);
}

.page-contact .c-intake__item {
  display: grid;
  gap: 6px 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .c-intake__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-contact .c-intake__name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  color: var(--tea);
}

.page-contact .c-intake__desc {
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(30, 26, 23, .82);
}

.page-contact .c-intake__eg {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--clay);
}

@media (min-width: 760px) {
  .page-contact .c-intake__item {
    grid-template-columns: 48px minmax(140px, 190px) minmax(0, 1fr);
    align-items: baseline;
  }
}

.page-contact .c-outline {
  margin-top: 32px;
  padding: 24px 26px;
  background: var(--sand);
  border-left: 4px solid var(--tea);
}

.page-contact .c-outline__text {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  overflow-wrap: anywhere;
}

/* ---------- 05 联系信息 ---------- */
.page-contact .c-lines {
  margin: 40px 0 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .c-line {
  display: grid;
  gap: 10px;
  padding: 26px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .c-line__key {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  color: var(--tea);
}

.page-contact .c-line__value {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 26px);
  line-height: 1.4;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .c-line__desc {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(30, 26, 23, .75);
}

.page-contact .c-line__copy {
  margin-top: 14px;
}

@media (min-width: 820px) {
  .page-contact .c-line {
    grid-template-columns: minmax(150px, 210px) minmax(0, 1fr);
    column-gap: 44px;
    align-items: start;
    padding: 30px 0;
  }
}

/* ---------- 复制按钮（浅底通用） ---------- */
.page-contact .c-line__copy,
.page-contact .c-outline__btn {
  display: inline-block;
  padding: 9px 18px;
  border: 1px solid var(--rule-strong);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .c-line__copy:hover,
.page-contact .c-outline__btn:hover {
  background: var(--clay);
  border-color: var(--clay);
  color: var(--paper);
}

.page-contact .c-line__copy.is-copied,
.page-contact .c-outline__btn.is-copied {
  background: var(--celadon);
  border-color: var(--celadon);
  color: var(--paper);
}

/* ---------- 结尾 ---------- */
.page-contact .c-sec--cta {
  padding-bottom: clamp(64px, 8vw, 110px);
}

.page-contact .c-cta {
  display: grid;
  gap: 26px;
  padding: 34px 28px;
  background: var(--pit);
  color: var(--paper);
  border-right: 6px solid var(--clay);
}

.page-contact .c-cta__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-contact .c-cta__text p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pale-gold);
}

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

.page-contact .c-cta__actions .btn {
  text-decoration: none;
}

@media (min-width: 860px) {
  .page-contact .c-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 48px;
    padding: 46px 44px;
  }

  .page-contact .c-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .c-case,
  .page-contact .c-case__num,
  .page-contact .c-flow__step::after,
  .page-contact .copy-btn,
  .page-contact .c-line__copy,
  .page-contact .c-outline__btn {
    transition: none;
  }

  .page-contact .c-case:hover {
    transform: none;
  }
}
</main>