.page-contact {
  --contact-cut: 22px;
  --contact-rule: rgba(184, 198, 193, 0.16);
  background: var(--arena);
  color: var(--fog);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-contact img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-contact .breadcrumbs {
  margin-bottom: clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-top {
  position: relative;
  padding: clamp(16px, 3vw, 26px) 0 clamp(40px, 6vw, 76px);
  background: var(--carbon);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}

.page-contact .contact-top::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -12%;
  width: 54vw;
  height: 168%;
  background: linear-gradient(140deg, var(--cyan-wash), transparent 64%);
  transform: skewX(calc(var(--slant) * -1));
  pointer-events: none;
}

.page-contact .contact-top::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--hairline) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(0deg, var(--hairline) 0 1px, transparent 1px 84px);
  opacity: 0.4;
  pointer-events: none;
}

.page-contact .contact-top .shell {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 7.4vw, 66px);
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--fog);
}

.page-contact .contact-hero__lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--silver);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 34px);
}

/* ---------- 直连通道 ---------- */

.page-contact .channels {
  position: relative;
  padding: clamp(46px, 7vw, 96px) 0;
  background: var(--arena);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}

.page-contact .channels__backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-contact .channels__backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.14;
  filter: saturate(0.55);
}

.page-contact .channels__backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, var(--arena) 20%, rgba(10, 31, 25, 0.6) 64%, rgba(10, 31, 25, 0.94) 100%);
}

.page-contact .channels .shell {
  position: relative;
  z-index: 1;
}

.page-contact .channels__grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-contact .channels__main {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .channel {
  display: block;
  padding: clamp(20px, 3vw, 30px);
  background: var(--panel);
  border: 1px solid var(--hairline-strong);
  clip-path: polygon(0 0, calc(100% - var(--contact-cut)) 0, 100% var(--contact-cut), 100% 100%, 0 100%);
  text-decoration: none;
  color: var(--fog);
  transition: background-color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel:focus-visible {
  background: var(--cyan-wash);
  border-color: var(--cyan);
}

.page-contact .channel__label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .channel__value {
  display: block;
  margin: 10px 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 6vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--fog);
  overflow-wrap: anywhere;
}

.page-contact .channel__value--mail {
  font-size: clamp(15px, 4.2vw, 28px);
}

.page-contact .channel__hint {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .checklist {
  align-self: start;
  padding: clamp(22px, 3.2vw, 32px);
}

.page-contact .checklist__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.3;
  color: var(--fog);
}

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

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
}

.page-contact .checklist__item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .checklist__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-size: 12px;
  color: var(--cyan);
  border: 1px solid var(--cyan-deep);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}

.page-contact .checklist__head {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--fog);
}

.page-contact .checklist__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 回复节奏 ---------- */

.page-contact .hours {
  padding: clamp(44px, 6vw, 84px) 0;
  background: var(--carbon);
  border-bottom: 1px solid var(--hairline);
}

.page-contact .hours__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3.2vw, 32px);
  background: var(--hairline-strong);
  border: 1px solid var(--hairline-strong);
}

.page-contact .hours__cell {
  background: var(--carbon);
  padding: clamp(20px, 3vw, 30px);
}

.page-contact .hours__figure {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3.8vw, 32px);
  line-height: 1.15;
  color: var(--orange);
  overflow-wrap: anywhere;
}

.page-contact .hours__label {
  margin: 10px 0 6px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

.page-contact .hours__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 合作与纠错 ---------- */

.page-contact .coop {
  padding: clamp(46px, 7vw, 96px) 0;
  background: var(--arena);
}

.page-contact .coop__lead {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-contact .coop__grid {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  margin-top: clamp(24px, 4vw, 38px);
}

.page-contact .coop__block {
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--cyan-deep);
}

.page-contact .coop__block-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 22px);
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-contact .coop__block-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .coop__subjects {
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: 20px;
  border-top: 1px solid var(--hairline-strong);
}

.page-contact .coop__subjects-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .coop__subjects-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .coop__details {
  margin-top: clamp(24px, 4vw, 38px);
  padding: clamp(18px, 3vw, 26px);
  background: var(--panel);
  border: 1px solid var(--hairline-strong);
  clip-path: polygon(0 0, calc(100% - var(--contact-cut)) 0, 100% var(--contact-cut), 100% 100%, 0 100%);
}

.page-contact .coop__details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 21px);
  letter-spacing: 0.02em;
  color: var(--fog);
}

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

.page-contact .coop__details summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .coop__details[open] summary::after {
  content: "−";
}

.page-contact .coop__list {
  display: grid;
  gap: 18px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .coop__item {
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}

.page-contact .coop__item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .coop__item-title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--cyan);
}

.page-contact .coop__item-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 地址与备案 ---------- */

.page-contact .addr {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--carbon);
  border-top: 1px solid var(--hairline);
}

.page-contact .addr__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-contact .addr__list {
  margin: clamp(20px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--hairline);
}

.page-contact .addr__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-contact .addr__row dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .addr__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--fog);
  overflow-wrap: anywhere;
}

.page-contact .addr__figure {
  margin: 0;
}

.page-contact .addr__figure img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: brightness(0.82) saturate(0.7);
  clip-path: polygon(0 0, calc(100% - var(--contact-cut)) 0, 100% var(--contact-cut), 100% 100%, 0 100%);
}

.page-contact .addr__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 延伸入口 ---------- */

.page-contact .more {
  padding: clamp(36px, 5vw, 64px) 0 clamp(52px, 7vw, 88px);
  background: var(--carbon);
  border-top: 1px solid var(--hairline);
}

.page-contact .more__inner {
  display: grid;
  gap: 18px;
}

.page-contact .more__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.8vw, 28px);
  color: var(--fog);
}

.page-contact .more__text {
  margin: 8px 0 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .more__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-contact .addr__row {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-contact .hours__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .more__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 920px) {
  .page-contact .channels__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-contact .addr__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel {
    transition: none;
  }
}