.page-contact {
  --ct-gap: clamp(18px, 3vw, 30px);
  --ct-rail-base: 44px;
}

.page-contact__ctx {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .page-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-contact .page-index .index-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-body);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .page-index .index-link:hover,
.page-contact .page-index .index-link.is-active {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: clamp(30px, 5vw, 64px) 0 clamp(24px, 4vw, 44px);
  background:
    radial-gradient(110% 80% at 88% 0%, rgba(108, 123, 255, 0.16), transparent 62%),
    radial-gradient(80% 60% at 0% 100%, rgba(255, 122, 51, 0.08), transparent 60%);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 18px;
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .hero-art {
  margin: 0;
}

/* ---------- 联系渠道 ---------- */
.page-contact .reach-grid {
  margin-top: clamp(24px, 3vw, 38px);
  row-gap: var(--ct-gap);
}

.page-contact .reach-card {
  position: relative;
  background: var(--c-panel);
  padding: 26px 24px 30px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: transform 0.18s var(--ease), background 0.18s var(--ease);
}

.page-contact .reach-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--c-orange);
  transition: width 0.24s var(--ease);
}

.page-contact .reach-card:hover,
.page-contact .reach-card:focus-within {
  transform: translateY(-2px);
  background: var(--c-panel-up);
}

.page-contact .reach-card:hover::before,
.page-contact .reach-card:focus-within::before {
  width: 72px;
}

.page-contact .reach-card__key {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
}

.page-contact .reach-card__val {
  margin: 12px 0 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-paper);
  word-break: break-word;
}

.page-contact .reach-card__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-body);
}

/* ---------- 响应数据条 ---------- */
.page-contact .resp-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-contact .resp-strip__item {
  background: var(--c-night);
  padding: 18px 16px 20px;
}

.page-contact .resp-strip__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--c-orange);
}

.page-contact .resp-strip__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-body);
}

/* ---------- 通道节奏 ---------- */
.page-contact .channel-grid {
  margin-top: clamp(26px, 3vw, 40px);
  row-gap: clamp(28px, 4vw, 40px);
  align-items: center;
}

.page-contact .cycle-rail {
  position: relative;
  display: flex;
  margin: 0 0 4px;
  padding: 0;
  height: 168px;
  list-style: none;
}

.page-contact .cycle-rail::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: var(--ct-rail-base);
  height: 1px;
  background: var(--c-line);
}

.page-contact .cycle-rail__tick {
  position: relative;
  flex: 1 1 0;
  height: 100%;
  outline-offset: 3px;
}

.page-contact .cycle-rail__bar {
  position: absolute;
  bottom: var(--ct-rail-base);
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 38px;
  background: var(--c-line);
}

.page-contact .cycle-rail__tick--live .cycle-rail__bar {
  width: 2px;
  height: 84px;
  background: var(--c-orange);
}

.page-contact .cycle-rail__label {
  position: absolute;
  bottom: 14px;
  left: 0;
  right: 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-body);
}

.page-contact .cycle-rail__tick--live .cycle-rail__label {
  color: var(--c-orange-soft);
}

.page-contact .cycle-rail__pop {
  position: absolute;
  bottom: calc(var(--ct-rail-base) + 94px);
  left: 50%;
  width: 168px;
  padding: 10px 12px;
  background: var(--c-panel-up);
  border: 1px solid var(--c-line);
  color: var(--c-paper);
  font-size: 12px;
  line-height: 1.55;
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 6px);
  transition: opacity 0.16s var(--ease), transform 0.16s var(--ease);
  z-index: 3;
}

.page-contact .cycle-rail__tick:hover .cycle-rail__pop,
.page-contact .cycle-rail__tick:focus .cycle-rail__pop {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.page-contact .cycle-rail__tick:first-child .cycle-rail__pop {
  left: 0;
  transform: translate(0, 6px);
}

.page-contact .cycle-rail__tick:first-child:hover .cycle-rail__pop,
.page-contact .cycle-rail__tick:first-child:focus .cycle-rail__pop {
  transform: translate(0, 0);
}

.page-contact .cycle-rail__tick:last-child .cycle-rail__pop {
  left: auto;
  right: 0;
  transform: translate(0, 6px);
}

.page-contact .cycle-rail__tick:last-child:hover .cycle-rail__pop,
.page-contact .cycle-rail__tick:last-child:focus .cycle-rail__pop {
  transform: translate(0, 0);
}

.page-contact .cycle-type {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .cycle-type li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-body);
}

.page-contact .cycle-note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-orange);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-body);
}

/* ---------- 订阅与反馈 ---------- */
.page-contact .sub-grid {
  margin-top: clamp(24px, 3vw, 38px);
  row-gap: clamp(22px, 3vw, 32px);
}

.page-contact .topic-panel,
.page-contact .feedback {
  padding: clamp(22px, 3vw, 32px);
}

.page-contact .sub-h {
  margin: 0 0 18px;
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-paper);
}

.page-contact .topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .topic {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid var(--c-line);
  background: var(--c-night);
  color: var(--c-body);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease), color 0.16s var(--ease);
}

.page-contact .topic input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .topic:hover {
  border-color: var(--c-orange-soft);
  color: var(--c-paper);
}

.page-contact .topic:has(input:checked) {
  border-color: var(--c-orange);
  background: var(--c-panel-up);
  color: var(--c-paper);
}

.page-contact .topic:has(input:focus-visible) {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}

.page-contact .topic-hint {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-contact .field {
  margin-bottom: 18px;
}

.page-contact .field__label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-contact .field__input,
.page-contact .field__area {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  background: var(--c-night);
  border: 1px solid var(--c-line);
  color: var(--c-paper);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  transition: border-color 0.16s var(--ease), box-shadow 0.16s var(--ease);
}

.page-contact .field__area {
  min-height: 132px;
  resize: vertical;
}

.page-contact .field__input::placeholder,
.page-contact .field__area::placeholder {
  color: #7C87A6;
}

.page-contact .field__input:focus,
.page-contact .field__area:focus {
  outline: none;
  border-color: var(--c-orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 51, 0.16);
}

.page-contact .submit-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 22px;
}

.page-contact .form-note {
  margin: 0;
  max-width: 48ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-body);
}

/* ---------- 合作与投稿 ---------- */
.page-contact .coop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 26px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-contact .coop-card {
  background: var(--c-night);
  padding: 26px 24px 30px;
  border-top: 2px solid var(--c-orange);
}

.page-contact .coop-card--org {
  border-top-color: var(--c-cyan);
}

.page-contact .coop-card h3 {
  margin: 0 0 12px;
  font-size: 1.125rem;
  letter-spacing: 0.03em;
  color: var(--c-paper);
}

.page-contact .coop-card p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-contact .inline-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-orange);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--c-line);
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}

.page-contact .inline-link:hover {
  color: var(--c-orange-soft);
  border-bottom-color: var(--c-orange-soft);
}

/* ---------- 响应与值班 ---------- */
.page-contact .duty-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-contact .duty-cell {
  background: var(--c-night);
  padding: 22px 20px 24px;
}

.page-contact .duty-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-cyan);
}

.page-contact .duty-cell__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-contact .next-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 3vw, 38px);
}

/* ---------- 响应式 ---------- */
@media (max-width: 639px) {
  .page-contact .cycle-rail {
    height: 138px;
  }

  .page-contact .cycle-rail__pop {
    display: none;
  }

  .page-contact .cycle-rail__tick--live .cycle-rail__bar {
    height: 66px;
  }
}

@media (min-width: 640px) {
  .page-contact .resp-strip {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 820px) {
  .page-contact .coop-grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 1.02fr 0.98fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .reach-card,
  .page-contact .reach-card::before,
  .page-contact .cycle-rail__pop,
  .page-contact .topic,
  .page-contact .inline-link {
    transition: none;
  }

  .page-contact .reach-card:hover,
  .page-contact .reach-card:focus-within {
    transform: none;
  }
}