/* ============================================================
   反馈通道 / feedback —— 页面专属样式（作用域 .page-contact）
   移动端优先
   ============================================================ */

.page-contact {
  background: var(--paper);
  color: var(--char);
}

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

.page-contact .breadcrumb {
  border-bottom: 1px solid var(--line);
  padding-bottom: calc(var(--u) * 1.5);
  margin-bottom: calc(var(--u) * 2);
}

/* ---------------- 首屏：不对称双栏 ---------------- */
.page-contact .ct-hero {
  padding-bottom: calc(var(--u) * 7);
}

.page-contact .ct-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: calc(var(--u) * 4);
}

.page-contact .ct-hero__main {
  min-width: 0;
  padding-top: calc(var(--u) * 1.5);
}

.page-contact .ct-hero__main .eyebrow {
  color: var(--red);
  letter-spacing: .1em;
}

.page-contact .ct-hero__main h1 {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(1.9rem, 7.2vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -.015em;
  margin: calc(var(--u) * 1.5) 0 0;
  max-width: 17ch;
  color: var(--char);
}

.page-contact .ct-hero__lede {
  margin: calc(var(--u) * 2.5) 0 0;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--char-soft);
  max-width: 56ch;
}

.page-contact .ct-quick {
  margin-top: calc(var(--u) * 3);
}

.page-contact .ct-quick .tag {
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 calc(var(--u) * 1.75);
  color: var(--char);
  border: 1px solid var(--line-dark);
  background: transparent;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

.page-contact .ct-quick .tag:hover,
.page-contact .ct-quick .tag:focus-visible {
  background: var(--red);
  border-color: var(--red);
  color: var(--paper);
}

.page-contact .ct-hero__note {
  margin: calc(var(--u) * 3) 0 0;
  padding-left: calc(var(--u) * 1.75);
  border-left: 3px solid var(--amber);
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--char-soft);
  max-width: 52ch;
}

/* ---------------- 深墨绿信息块 ---------------- */
.page-contact .ct-rail {
  position: relative;
  min-width: 0;
  background: var(--ink);
  border: 1px solid var(--steel);
  color: var(--paper);
  padding: calc(var(--u) * 3) calc(var(--u) * 3) calc(var(--u) * 4);
  overflow: hidden;
}

.page-contact .ct-rail::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 96px;
  background-image:
    linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size: calc(var(--u) * 4) calc(var(--u) * 4);
  opacity: .55;
  pointer-events: none;
}

.page-contact .ct-rail__figure {
  position: relative;
  z-index: 1;
  margin: calc(var(--u) * -3) calc(var(--u) * -3) calc(var(--u) * 3);
}

.page-contact .ct-rail__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-contact .ct-rail__num {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--yellow);
}

.page-contact .ct-rail__title {
  position: relative;
  z-index: 1;
  font-family: var(--f-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--paper);
  margin: calc(var(--u) * 1) 0 calc(var(--u) * 2.5);
  padding-bottom: calc(var(--u) * 1.5);
  border-bottom: 1px solid var(--line-dark);
}

.page-contact .ct-channels {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: calc(var(--u) * 3);
}

.page-contact .ct-channel {
  border-left: 2px solid var(--red);
  padding-left: calc(var(--u) * 2);
}

.page-contact .ct-channel__label {
  display: block;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--yellow);
  margin-bottom: calc(var(--u) * .75);
}

.page-contact .ct-channel__value {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(1rem, 4.4vw, 1.25rem);
  line-height: 1.4;
  letter-spacing: .01em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .ct-channel__use {
  margin: calc(var(--u) * .75) 0 0;
  font-size: .875rem;
  line-height: 1.65;
  color: var(--paper-72);
}

/* ---------------- 章节通用间距 ---------------- */
.page-contact .ct-write,
.page-contact .ct-phone,
.page-contact .ct-visit,
.page-contact .ct-coop,
.page-contact .ct-flow,
.page-contact .ct-next {
  padding: calc(var(--u) * 6) 0;
}

.page-contact .ct-write__grid,
.page-contact .ct-visit__grid,
.page-contact .ct-phone__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: calc(var(--u) * 3.5);
}

.page-contact .ct-write__body,
.page-contact .ct-visit__body,
.page-contact .ct-phone__text {
  min-width: 0;
}

.page-contact .section__num {
  color: var(--red);
}

/* ---------------- 02 写信要点 ---------------- */
.page-contact .ct-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-dark);
}

.page-contact .ct-check {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: calc(var(--u) * 1.5);
  padding: calc(var(--u) * 2.5) 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-check__mark {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--char-soft);
  padding-left: calc(var(--u) * 1.25);
  border-left: 3px solid var(--amber);
  line-height: 1.6;
}

.page-contact .ct-check__title {
  margin: 0;
  font-family: var(--f-serif);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--char);
}

.page-contact .ct-check__body {
  margin: calc(var(--u) * .75) 0 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--char-soft);
}

.page-contact .ct-check__body a {
  color: var(--red-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .ct-draft {
  margin-top: calc(var(--u) * 3.5);
  background: var(--paper-2);
  border: 1px solid var(--line-dark);
  border-top: 3px solid var(--red);
  padding: calc(var(--u) * 2.5);
}

.page-contact .ct-draft__label {
  margin: 0 0 calc(var(--u) * 1.5);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--red-deep);
}

.page-contact .ct-draft__body {
  margin: 0;
  font-family: var(--f-mono);
  font-size: .875rem;
  line-height: 1.9;
  color: var(--char);
  overflow-wrap: anywhere;
}

/* ---------------- 03 电话 ---------------- */
.page-contact .ct-phone {
  background: var(--ink);
  color: var(--paper);
  position: relative;
}

.page-contact .ct-phone::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--steel);
}

.page-contact .ct-phone .section__lede {
  color: var(--paper-72);
}

.page-contact .ct-phone__facts {
  margin: calc(var(--u) * 3) 0 0;
  display: grid;
  gap: 0;
}

.page-contact .ct-fact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: calc(var(--u) * .5);
  padding: calc(var(--u) * 2) 0;
  border-top: 1px solid var(--line-dark);
}

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

.page-contact .ct-fact__key {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--yellow);
  margin: 0;
}

.page-contact .ct-fact__val {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--paper);
}

.page-contact .ct-phone__figure {
  margin: 0;
}

.page-contact .ct-phone__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--line-dark);
}

.page-contact .ct-phone__figure .media__caption {
  margin-top: calc(var(--u) * 1.25);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--paper-45);
  line-height: 1.7;
}

/* ---------------- 04 到访与邮寄 ---------------- */
.page-contact .ct-visit {
  background: var(--paper);
}

.page-contact .ct-address {
  border: 1px solid var(--line-dark);
  border-left: 4px solid var(--red);
  padding: calc(var(--u) * 2.5);
  background: var(--paper-2);
}

.page-contact .ct-address__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--red-deep);
}

.page-contact .ct-address__line {
  margin: calc(var(--u) * 1.25) 0 0;
  font-family: var(--f-serif);
  font-size: clamp(1.125rem, 4.6vw, 1.4rem);
  line-height: 1.55;
  color: var(--char);
}

.page-contact .ct-mail-steps {
  list-style: none;
  margin: calc(var(--u) * 3.5) 0 0;
  padding: 0;
  display: grid;
  gap: calc(var(--u) * 2.5);
}

.page-contact .ct-mail-step {
  display: grid;
  gap: calc(var(--u) * .75);
  padding-left: calc(var(--u) * 2);
  border-left: 1px solid var(--line-dark);
}

.page-contact .ct-mail-step__idx {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--char-soft);
}

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

/* ---------------- 05 合作与共建 ---------------- */
.page-contact .ct-coop {
  background: var(--paper-2);
}

.page-contact .ct-coop__head {
  margin-bottom: calc(var(--u) * 3.5);
}

.page-contact .ct-coop__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: calc(var(--u) * 3);
}

.page-contact .ct-coop__card {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line-dark);
  border-top: 3px solid var(--red);
  padding: calc(var(--u) * 3);
  transition: border-top-color .18s ease, transform .18s ease;
}

.page-contact .ct-coop__tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--char-soft);
}

.page-contact .ct-coop__title {
  margin: calc(var(--u) * 1.5) 0 0;
  font-family: var(--f-serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--char);
}

.page-contact .ct-coop__body {
  margin: calc(var(--u) * 1.5) 0 0;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--char-soft);
}

.page-contact .ct-coop__ask {
  margin: calc(var(--u) * 2.5) 0 0;
  padding-top: calc(var(--u) * 1.5);
  border-top: 1px solid var(--line);
  font-size: .875rem;
  line-height: 1.7;
  color: var(--char);
}

.page-contact .ct-coop__ask .mono {
  display: block;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--amber);
  margin-bottom: calc(var(--u) * .5);
}

@media (hover: hover) {
  .page-contact .ct-coop__card:hover {
    border-top-color: var(--yellow);
    transform: translateY(-3px);
  }
}

/* ---------------- 06 处理顺序 ---------------- */
.page-contact .ct-flow {
  background: var(--ink);
  color: var(--paper);
}

.page-contact .ct-flow__head {
  margin-bottom: calc(var(--u) * 2);
}

.page-contact .ct-flow .section__num {
  color: var(--yellow);
}

.page-contact .ct-flow .section__lede {
  color: var(--paper-72);
}

.page-contact .ct-flow__track {
  list-style: none;
  margin: calc(var(--u) * 4) 0 0;
  padding: 0;
  display: grid;
  gap: calc(var(--u) * 4);
}

.page-contact .ct-flow__node {
  position: relative;
  padding-top: calc(var(--u) * 3.5);
  border-top: 1px solid var(--line-dark);
}

.page-contact .ct-flow__dot {
  position: absolute;
  top: calc(var(--u) * -1);
  left: 0;
  width: 15px;
  height: 15px;
  border: 2px solid var(--yellow);
  background: var(--ink);
  transition: background-color .18s ease;
}

.page-contact .ct-flow__step {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--yellow);
}

.page-contact .ct-flow__title {
  margin: calc(var(--u) * 1) 0 0;
  font-family: var(--f-serif);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-contact .ct-flow__when {
  margin: calc(var(--u) * .5) 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--grey);
}

.page-contact .ct-flow__detail {
  margin: calc(var(--u) * 1.5) 0 0;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--paper-72);
}

@media (hover: hover) {
  .page-contact .ct-flow__node:hover .ct-flow__dot {
    background: var(--yellow);
  }
  .page-contact .ct-flow__node:hover .ct-flow__detail {
    color: var(--paper);
  }
}

/* ---------------- 末段导流 ---------------- */
.page-contact .ct-next {
  background: var(--paper);
  border-top: 1px solid var(--line-dark);
}

.page-contact .ct-next__inner {
  max-width: 720px;
}

.page-contact .ct-next__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--char-soft);
}

.page-contact .ct-next__title {
  margin: calc(var(--u) * 1.5) 0 0;
  font-family: var(--f-serif);
  font-size: clamp(1.375rem, 5vw, 1.875rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--char);
}

.page-contact .ct-next__lede {
  margin: calc(var(--u) * 2) 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--char-soft);
}

.page-contact .ct-next__links {
  margin-top: calc(var(--u) * 3);
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--u) * 1.5);
}

.page-contact .ct-next__links .btn {
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.page-contact .ct-next__minor {
  list-style: none;
  margin: calc(var(--u) * 3) 0 0;
  padding: 0;
  display: grid;
  gap: calc(var(--u) * 1.25);
}

.page-contact .ct-next__minor a {
  font-size: .9375rem;
  color: var(--red-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  line-height: 1.6;
}

/* ============================================================
   断点 640px
   ============================================================ */
@media (min-width: 640px) {
  .page-contact .ct-channel__value {
    font-size: 1.25rem;
  }

  .page-contact .ct-coop__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ct-fact {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: calc(var(--u) * 2);
    align-items: baseline;
  }
}

/* ============================================================
   断点 860px
   ============================================================ */
@media (min-width: 860px) {
  .page-contact .ct-hero {
    padding-bottom: calc(var(--u) * 9);
  }

  .page-contact .ct-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: calc(var(--u) * 6);
    align-items: start;
  }

  .page-contact .ct-hero__main {
    grid-column: 2;
    grid-row: 1;
    padding-top: 0;
  }

  .page-contact .ct-rail {
    grid-column: 1;
    grid-row: 1;
  }

  .page-contact .ct-write,
  .page-contact .ct-phone,
  .page-contact .ct-visit,
  .page-contact .ct-coop,
  .page-contact .ct-flow,
  .page-contact .ct-next {
    padding: calc(var(--u) * 10) 0;
  }

  .page-contact .ct-write__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: calc(var(--u) * 8);
    align-items: start;
  }

  .page-contact .ct-visit__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: calc(var(--u) * 8);
    align-items: start;
  }

  .page-contact .ct-phone__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: calc(var(--u) * 8);
    align-items: center;
  }

  .page-contact .ct-coop__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: calc(var(--u) * 3.5);
  }

  .page-contact .ct-flow__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: calc(var(--u) * 3);
    position: relative;
  }

  .page-contact .ct-flow__track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: calc(var(--u) * .75);
    height: 1px;
    background: var(--line-dark);
    pointer-events: none;
  }

  .page-contact .ct-flow__node {
    border-top: none;
    padding-top: calc(var(--u) * 4);
  }

  .page-contact .ct-flow__dot {
    top: 0;
  }
}

/* ============================================================
   断点 1180px
   ============================================================ */
@media (min-width: 1180px) {
  .page-contact .ct-rail {
    padding: calc(var(--u) * 3.5) calc(var(--u) * 3.5) calc(var(--u) * 4.5);
  }

  .page-contact .ct-rail__figure {
    margin: calc(var(--u) * -3.5) calc(var(--u) * -3.5) calc(var(--u) * 3.5);
  }

  .page-contact .ct-hero__grid {
    gap: calc(var(--u) * 8);
  }

  .page-contact .ct-draft {
    padding: calc(var(--u) * 3);
  }
}

/* ============================================================
   减少动效
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-coop__card,
  .page-contact .ct-flow__dot,
  .page-contact .ct-quick .tag {
    transition: none;
  }

  .page-contact .ct-coop__card:hover {
    transform: none;
  }
}
<<<END>>>