.page-contact {
  --ct-lane-line: 4px;
  background-color: var(--ink);
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--paper);
}

.page-contact .mono {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 48px) 0 clamp(36px, 6vw, 76px);
}

.page-contact .ct-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  left: -35%;
  width: 130%;
  height: 165%;
  background:
    radial-gradient(58% 62% at 22% 26%, rgba(70, 224, 208, .16), transparent 70%),
    linear-gradient(122deg, rgba(214, 255, 63, .12), transparent 56%);
  clip-path: polygon(0 0, 100% 0, 74% 100%, 0 86%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .ct-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}

.page-contact .ct-hero__copy h1 {
  margin: 10px 0 16px;
  font-size: clamp(30px, 6.2vw, 60px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-contact .ct-hero__copy .lead {
  max-width: 40ch;
  color: var(--text-dim);
}

.page-contact .ct-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-contact .ct-hero__facts {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .ct-hero__facts dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-faint);
}

.page-contact .ct-hero__facts dd {
  margin: 6px 0 0;
  font-size: 17px;
  font-weight: 700;
}

.page-contact .ct-hero__media {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.page-contact .ct-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-l);
}

.page-contact .ct-hero__media .media__cap {
  padding: 10px 4px 0;
  font-size: 13px;
  color: var(--text-faint);
}

/* ---------- 章节通用 ---------- */
.page-contact .ct-section {
  padding: clamp(38px, 6vw, 84px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .ct-intro {
  max-width: 62ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
  color: var(--text-dim);
  font-size: 17px;
  line-height: 1.75;
}

/* ---------- 01 通道 ---------- */
.page-contact .ct-channels__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-contact .ct-lane {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px 22px 26px 26px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .ct-lane::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--ct-lane-line);
  background: var(--lane-accent, var(--volt));
}

.page-contact .ct-lane--volt { --lane-accent: var(--volt); }
.page-contact .ct-lane--cyan { --lane-accent: var(--cyan); }

.page-contact .ct-lane--bamboo {
  --lane-accent: var(--flag);
  background: linear-gradient(158deg, var(--bamboo), var(--panel) 72%);
}

.page-contact .ct-lane__tag {
  align-self: flex-start;
  margin: 0 0 14px;
  padding: 4px 11px;
  border-radius: 999px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
}

.page-contact .ct-lane--volt .ct-lane__tag {
  color: var(--volt);
  background: rgba(214, 255, 63, .13);
}

.page-contact .ct-lane--cyan .ct-lane__tag {
  color: var(--cyan);
  background: rgba(70, 224, 208, .13);
}

.page-contact .ct-lane--bamboo .ct-lane__tag {
  color: var(--card-yellow);
  background: rgba(255, 197, 61, .15);
}

.page-contact .ct-lane__title {
  margin: 0 0 12px;
  font-size: 23px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .ct-lane__text {
  margin: 0 0 16px;
  color: var(--text-dim);
  font-size: 15.5px;
  line-height: 1.75;
}

.page-contact .ct-lane__list {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .ct-lane__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.6;
}

.page-contact .ct-lane__list li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--lane-accent, var(--volt));
}

.page-contact .ct-lane__foot {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--text-faint);
}

/* ---------- 02 准备清单 ---------- */
.page-contact .ct-prep__layout {
  display: grid;
  gap: 20px;
}

.page-contact .ct-prep__tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.page-contact .ct-prep__tab {
  flex: 0 0 auto;
  min-height: 48px;
  padding: 13px 18px;
  border-radius: var(--radius-s);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text-dim);
  font: inherit;
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .ct-prep__tab:hover {
  border-color: var(--cyan);
  color: var(--paper);
}

.page-contact .ct-prep__tab[aria-selected="true"] {
  background: var(--volt);
  border-color: var(--volt);
  color: var(--text-ink);
  font-weight: 800;
}

.page-contact .ct-prep__tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .ct-prep__panels {
  min-width: 0;
}

.page-contact .ct-prep__panel {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(43, 91, 74, .32), rgba(21, 32, 29, .92));
}

.page-contact .ct-prep__panel[hidden],
.page-contact .ct-prep__panel[aria-hidden="true"] {
  display: none;
}

.page-contact .ct-prep__heading {
  margin: 0 0 18px;
  font-size: 19px;
  font-weight: 800;
}

.page-contact .ct-prep__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .ct-prep__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-contact .ct-prep__list .mono {
  color: var(--volt);
  font-size: 14px;
  padding-top: 3px;
}

.page-contact .ct-prep__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-radius: var(--radius-s);
  border-left: 3px solid var(--cyan);
  background: rgba(70, 224, 208, .08);
  font-size: 14px;
  color: var(--text-dim);
}

/* ---------- 03 响应节奏 ---------- */
.page-contact .ct-rhythm__layout {
  display: grid;
  gap: 26px;
  align-items: start;
}

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

.page-contact .ct-rhythm__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-contact .ct-rhythm__media .media__cap {
  padding: 10px 2px 0;
  font-size: 13px;
  color: var(--text-faint);
}

.page-contact .ct-rhythm__panel .lead {
  max-width: 48ch;
  color: var(--text-dim);
}

.page-contact .ct-scale {
  margin: 26px 0 6px;
}

.page-contact .ct-scale__track {
  position: relative;
  height: 10px;
  border-radius: 999px;
  background: rgba(140, 154, 148, .18);
}

.page-contact .ct-scale__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 53%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--volt));
}

.page-contact .ct-scale__mark {
  position: absolute;
  top: -8px;
  left: 53%;
  width: 2px;
  height: 26px;
  background: var(--volt);
}

.page-contact .ct-scale__mark::after {
  content: "";
  position: absolute;
  top: -7px;
  left: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: var(--volt);
  box-shadow: 0 0 0 4px rgba(214, 255, 63, .18);
}

.page-contact .ct-scale__labels {
  position: relative;
  height: 18px;
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-faint);
}

.page-contact .ct-scale__label {
  position: absolute;
  top: 0;
  white-space: nowrap;
}

.page-contact .ct-scale__label:first-child { left: 0; }

.page-contact .ct-scale__label--mid {
  left: 53%;
  transform: translateX(-50%);
  color: var(--volt);
  font-family: var(--font-num);
}

.page-contact .ct-scale__label--end { right: 0; }

.page-contact .ct-rhythm__notes {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .ct-rhythm__notes li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-contact .ct-rhythm__notes li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 10px;
  height: 2px;
  background: var(--bamboo);
}

/* ---------- 04 纠错 ---------- */
.page-contact .ct-fixes {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-contact .ct-fix {
  padding: 22px 22px 20px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--line);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .ct-fix:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-contact .ct-fix__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.page-contact .ct-fix__title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
}

.page-contact .ct-fix__text {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .ct-fix__more summary {
  cursor: pointer;
  font-size: 14px;
  color: var(--cyan);
  padding: 6px 0;
}

.page-contact .ct-fix__more summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .ct-fix__steps {
  margin: 10px 0 0;
  padding: 0 0 0 20px;
  display: grid;
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-faint);
}

/* ---------- 05 合作 ---------- */
.page-contact .ct-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-contact .ct-partner {
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(21, 32, 29, .82);
}

.page-contact .ct-partner__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
}

.page-contact .ct-partner__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .ct-partner__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .ct-partner__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-faint);
  line-height: 1.65;
}

.page-contact .ct-partner__list li::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-contact .ct-coop__note {
  margin-top: 26px;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  border-left: 4px solid var(--volt);
  background: linear-gradient(120deg, rgba(214, 255, 63, .07), rgba(21, 32, 29, .9));
}

.page-contact .ct-coop__note-title {
  margin: 0 0 14px;
  font-size: 17px;
  font-weight: 800;
}

.page-contact .ct-partner__list--wide {
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .ct-partner__list--wide li { color: var(--text-dim); }

.page-contact .ct-coop__note-text {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-faint);
}

/* ---------- 06 站点信息 ---------- */
.page-contact .ct-site {
  padding-bottom: clamp(56px, 9vw, 110px);
}

.page-contact .ct-site__list {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .ct-site__row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-site__row dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-faint);
}

.page-contact .ct-site__row dd {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .ct-site__row dd.mono {
  letter-spacing: .02em;
}

.page-contact .ct-site__note {
  margin: 24px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-faint);
}

.page-contact .ct-site__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 224, 208, .45);
}

.page-contact .ct-site__note a:hover {
  border-bottom-color: var(--cyan);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-contact .ct-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .ct-site__row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }

  .page-contact .ct-partner__list--wide {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 24px;
  }

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

@media (min-width: 900px) {
  .page-contact .ct-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-contact .ct-prep__layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 30px;
  }

  .page-contact .ct-prep__tabs {
    flex-direction: column;
    overflow-x: visible;
  }

  .page-contact .ct-prep__tab {
    width: 100%;
  }

  .page-contact .ct-rhythm__layout {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 42px;
  }

  .page-contact .ct-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-contact .ct-channels__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .ct-lane:nth-child(2) {
    transform: translateY(30px);
  }

  .page-contact .ct-lane:nth-child(3) {
    transform: translateY(10px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-fix,
  .page-contact .ct-prep__tab {
    transition: none;
  }
}