.page-contact {
  --ct-pad: clamp(44px, 7vw, 92px);
  --ct-gap: clamp(16px, 2.4vw, 30px);
  background: var(--night);
  color: var(--glass);
  overflow-x: hidden;
}

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

.page-contact .section {
  padding-block: var(--ct-pad);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding-block: clamp(34px, 6vw, 78px) clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: 4%;
  width: min(56vw, 540px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(43, 240, 200, 0.17), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero > * {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero .crumb {
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-contact .kicker {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0;
}

.page-contact .sec-title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4.4vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 12px 0 14px;
  color: var(--glass);
}

.page-contact .lede {
  max-width: 36em;
  margin: 0 0 clamp(22px, 3vw, 34px);
  color: var(--mist);
  font-size: clamp(0.95rem, 1.7vw, 1.06rem);
  line-height: 1.78;
}

.page-contact .contact-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 6.6vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: 14px 0 18px;
  max-width: 15em;
  color: var(--glass);
}

.page-contact .hero-index {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  max-width: 660px;
}

.page-contact .hero-index li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.6;
}

.page-contact .hero-index .mono {
  flex: 0 0 auto;
  color: var(--cyan);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
}

/* ---------- 三类通道 ---------- */

.page-contact .channel-layout {
  display: grid;
  gap: clamp(20px, 3vw, 38px);
}

.page-contact .channel-select {
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
}

.page-contact .channel-card {
  appearance: none;
  display: grid;
  gap: 10px;
  width: 100%;
  padding: clamp(18px, 2.4vw, 26px);
  text-align: left;
  font: inherit;
  color: var(--glass);
  background: linear-gradient(158deg, rgba(232, 245, 240, 0.08), rgba(232, 245, 240, 0.015) 64%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
  transition: border-color 0.22s ease, background-color 0.22s ease;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--cyan);
  opacity: 0;
  transition: opacity 0.22s ease, background-color 0.22s ease;
}

.page-contact .channel-card:hover {
  border-color: rgba(43, 240, 200, 0.5);
}

.page-contact .channel-card[aria-pressed="true"] {
  border-color: var(--orange);
  background: linear-gradient(158deg, rgba(255, 138, 61, 0.14), rgba(232, 245, 240, 0.02) 72%);
}

.page-contact .channel-card[aria-pressed="true"]::before {
  opacity: 1;
  background: var(--orange);
}

.page-contact .channel-card:focus-visible {
  outline: 2px solid var(--lemon);
  outline-offset: 2px;
}

.page-contact .channel-card__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.page-contact .channel-card__idx {
  color: var(--cyan);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}

.page-contact .channel-card[aria-pressed="true"] .channel-card__idx {
  color: var(--orange);
}

.page-contact .channel-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.page-contact .channel-card__text {
  display: block;
  color: var(--mist);
  font-size: 0.93rem;
  line-height: 1.7;
}

.page-contact .channel-card__hint {
  display: block;
  color: rgba(232, 245, 240, 0.52);
  font-size: 0.7rem;
  letter-spacing: 0.09em;
}

.page-contact .channel-art {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-contact .channel-art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.78) brightness(0.78);
}

.page-contact .channel-art .media__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 16px 16px 13px;
  background: linear-gradient(to top, rgba(7, 28, 22, 0.94), rgba(7, 28, 22, 0));
  color: var(--mist);
  font-size: 0.75rem;
  letter-spacing: 0.07em;
}

.page-contact .channel-panes {
  margin-top: clamp(26px, 3.6vw, 44px);
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.page-contact .pane {
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-contact .pane[data-tags="fix"] {
  border-top-color: var(--orange);
}

.page-contact .pane[data-tags="coop"] {
  border-top-color: var(--lemon);
}

.page-contact .pane__title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--glass);
}

.page-contact .pane p {
  margin: 0 0 12px;
  color: var(--mist);
  font-size: 0.93rem;
  line-height: 1.78;
}

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

.page-contact .pane a,
.page-contact .mail__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-contact .pane a:hover,
.page-contact .mail__note a:hover {
  color: var(--lemon);
}

/* ---------- 联系方式 ---------- */

.page-contact .ways {
  position: relative;
  overflow: hidden;
}

.page-contact .ways__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  z-index: 0;
  pointer-events: none;
}

.page-contact .ways__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

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

.page-contact .ways__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

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

.page-contact .ways__row dt {
  color: var(--mist);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-contact .ways__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.8vw, 1.08rem);
  line-height: 1.55;
  color: var(--glass);
  overflow-wrap: anywhere;
}

.page-contact .ways__row:nth-child(2) dd {
  color: var(--orange);
}

/* ---------- 纠错要点 ---------- */

.page-contact .fix-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .fix-item {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .fix-item:first-child {
  border-top: 1px solid var(--line);
}

.page-contact .fix-item__idx {
  font-family: var(--font-mono);
  color: var(--orange);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  letter-spacing: 0.08em;
}

.page-contact .fix-item__body h3 {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.3vw, 1.35rem);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0 0 8px;
  color: var(--glass);
}

.page-contact .fix-item__body p {
  margin: 0;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.78;
  max-width: 34em;
}

/* ---------- 沟通场景 ---------- */

.page-contact .scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
}

.page-contact .scene {
  padding: clamp(18px, 2.4vw, 24px);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(90deg, rgba(43, 240, 200, 0.08), transparent 74%);
}

.page-contact .scene:nth-child(2) {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.09), transparent 74%);
}

.page-contact .scene:nth-child(3) {
  border-left-color: var(--lemon);
  background: linear-gradient(90deg, rgba(232, 255, 106, 0.08), transparent 74%);
}

.page-contact .scene__quote {
  margin: 0 0 10px;
  color: var(--glass);
  font-size: 0.98rem;
  line-height: 1.65;
}

.page-contact .scene__reply {
  margin: 0;
  color: var(--mist);
  font-size: 0.92rem;
  line-height: 1.78;
}

/* ---------- 合作 ---------- */

.page-contact .coop__grid {
  display: grid;
  gap: 12px;
}

.page-contact .coop__item {
  border: 1px solid rgba(232, 245, 240, 0.18);
  border-radius: var(--radius);
  background: rgba(232, 245, 240, 0.05);
}

.page-contact .coop__item summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 18px 46px 18px 18px;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  letter-spacing: -0.01em;
  color: var(--glass);
}

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

.page-contact .coop__item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--cyan);
}

.page-contact .coop__item[open] summary::after {
  content: "\2013";
  color: var(--orange);
}

.page-contact .coop__item summary:focus-visible {
  outline: 2px solid var(--lemon);
  outline-offset: -2px;
}

.page-contact .coop__body {
  padding: 0 18px 20px;
  border-top: 1px solid rgba(232, 245, 240, 0.12);
  padding-top: 16px;
}

.page-contact .coop__body p {
  margin: 0 0 12px;
  color: var(--mist);
  font-size: 0.93rem;
  line-height: 1.78;
}

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

/* ---------- 信函地址 ---------- */

.page-contact .mail {
  padding-bottom: clamp(70px, 12vw, 150px);
}

.page-contact .mail__inner {
  max-width: 760px;
}

.page-contact .mail__addr {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 3vw, 1.55rem);
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--glass);
  margin: 8px 0 20px;
  padding-left: 16px;
  border-left: 3px solid var(--orange);
  overflow-wrap: anywhere;
}

.page-contact .mail__note {
  margin: 0 0 14px;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 34em;
}

.page-contact .mail__note:last-child {
  margin-bottom: 0;
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-contact .ways__row {
    grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 34px);
    align-items: baseline;
    padding: 18px 0;
  }

  .page-contact .fix-item {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 34px);
    align-items: start;
  }
}

@media (min-width: 860px) {
  .page-contact .channel-panes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .coop__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-contact .channel-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(26px, 3.6vw, 46px);
  }

  .page-contact .ways__inner {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }

  .page-contact .ways__list {
    max-width: 620px;
  }
}

@media (min-width: 1024px) {
  .page-contact .channel-card--b {
    margin-top: 32px;
  }

  .page-contact .channel-card--c {
    margin-top: 64px;
  }

  .page-contact .channel-art {
    margin-top: 6px;
  }
}

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