.page-contact {
  --pc-line: rgba(143, 163, 168, .22);
  --pc-line-soft: rgba(143, 163, 168, .12);
  --pc-tint: rgba(255, 138, 61, .08);
  position: relative;
  isolation: isolate;
  padding-bottom: clamp(40px, 8vw, 80px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-intro {
  position: relative;
  padding-top: clamp(24px, 5vw, 56px);
}

.page-contact .contact-intro::before {
  content: "";
  position: absolute;
  inset: -40px 0 auto;
  height: 480px;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 76% at 6% -12%, rgba(255, 138, 61, .16), transparent 68%),
    radial-gradient(52% 66% at 94% 2%, rgba(43, 224, 184, .13), transparent 70%);
}

.page-contact .contact-intro__grid {
  margin-top: clamp(18px, 3vw, 30px);
}

.page-contact .contact-title {
  margin: 16px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .contact-lede {
  max-width: 34em;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.92;
  color: var(--muted);
}

.page-contact .contact-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-quick li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-contact .contact-quick b {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-contact .contact-intro__media {
  margin: 30px 0 0;
  border-radius: 4px;
  overflow: hidden;
}

.page-contact .contact-intro__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 沟通准备 ---------- */
.page-contact .contact-prep {
  margin-top: clamp(56px, 10vw, 118px);
}

.page-contact .contact-prep__note,
.page-contact .contact-reply__note {
  max-width: 36em;
  margin: 14px 0 0;
  font-size: .95rem;
  line-height: 1.88;
  color: var(--muted);
}

.page-contact .prep-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
}

.page-contact .prep-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px dashed var(--pc-line);
}

.page-contact .prep-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 20px 14px 20px 16px;
  border-bottom: 1px dashed var(--pc-line);
  scroll-margin-top: calc(var(--bar) + 28px);
  transition: background-color .24s ease;
}

.page-contact .prep-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: transparent;
  transition: background-color .24s ease;
}

.page-contact .prep-row:target {
  background-color: var(--pc-tint);
}

.page-contact .prep-row:target::before {
  background-color: var(--amber);
}

.page-contact .prep-row__code {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .prep-row__name {
  margin: 0;
  font-size: 1.04rem;
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1.5;
  color: var(--paper);
}

.page-contact .prep-row__need p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.88;
  color: var(--muted);
}

/* ---------- 联系方式 ---------- */
.page-contact .contact-channels {
  margin-top: clamp(56px, 10vw, 118px);
}

.page-contact .channels {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  padding: 1px;
  background: var(--pc-line);
  border-radius: 4px;
  overflow: hidden;
}

.page-contact .channel {
  padding: 26px 22px 28px;
  background: var(--ink-800);
}

.page-contact .channel::before {
  content: "";
  display: block;
  width: 34px;
  height: 2px;
  margin-bottom: 18px;
  background: linear-gradient(90deg, var(--cyan), rgba(43, 224, 184, 0));
}

.page-contact .channel__label {
  display: block;
  margin-bottom: 12px;
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(.9rem, 2.6vw, 1.04rem);
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel__value--plain {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.8;
  letter-spacing: .01em;
}

.page-contact .channel__note {
  margin: 12px 0 0;
  font-size: .84rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 内容合作 ---------- */
.page-contact .contact-coop {
  margin-top: clamp(56px, 10vw, 118px);
}

.page-contact .coop-banner {
  position: relative;
  margin-top: 26px;
  border: 1px solid var(--pc-line);
  border-radius: 4px 4px 0 0;
  overflow: hidden;
  background: var(--pitch);
}

.page-contact .coop-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: .82;
}

.page-contact .coop-grid {
  display: grid;
  gap: 1px;
  background: var(--pc-line);
  border: 1px solid var(--pc-line);
  border-top: none;
  border-radius: 0 0 4px 4px;
  overflow: hidden;
}

.page-contact .coop-cell {
  padding: 24px 20px 28px;
  background: var(--ink-800);
  transition: background-color .24s ease;
  outline: none;
}

.page-contact .coop-cell:hover,
.page-contact .coop-cell:focus-visible {
  background-color: var(--ink-700);
}

.page-contact .coop-cell__num {
  display: inline-block;
  padding: 3px 7px;
  border: 1px solid var(--hair-cyan);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .coop-cell__title {
  margin: 14px 0 8px;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-contact .coop-cell__lead {
  margin: 0;
  font-size: .94rem;
  line-height: 1.84;
  color: var(--muted);
}

.page-contact .coop-cell__more {
  margin: 10px 0 0;
  font-size: .87rem;
  line-height: 1.8;
  color: var(--muted);
  opacity: .82;
}

/* ---------- 回复顺序 ---------- */
.page-contact .contact-reply {
  margin-top: clamp(56px, 10vw, 118px);
}

.page-contact .reply-steps {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .reply-steps li {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 28px;
}

.page-contact .reply-steps li::after {
  content: "";
  position: absolute;
  left: 19px;
  top: 38px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(to bottom, var(--pc-line), transparent);
}

.page-contact .reply-steps li:last-child {
  padding-bottom: 0;
}

.page-contact .reply-steps li:last-child::after {
  display: none;
}

.page-contact .reply-steps__n {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-top: 2px;
  border: 1px solid var(--hair-cyan);
  border-radius: 50%;
  background: var(--ink-800);
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 600;
  color: var(--cyan);
}

.page-contact .reply-steps h3 {
  margin: 4px 0 6px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-contact .reply-steps p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.84;
  color: var(--muted);
}

/* ---------- 收束留白 ---------- */
.page-contact .contact-breathe {
  position: relative;
  margin-top: clamp(64px, 12vw, 140px);
  padding: clamp(64px, 13vw, 150px) 0 clamp(48px, 9vw, 96px);
  overflow: hidden;
}

.page-contact .contact-breathe::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(143, 163, 168, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 168, .09) 1px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: radial-gradient(72% 88% at 18% 44%, #000 0%, transparent 78%);
  mask-image: radial-gradient(72% 88% at 18% 44%, #000 0%, transparent 78%);
}

.page-contact .breathe-line {
  position: relative;
  max-width: 22em;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.4vw, 1.86rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .breathe-foot {
  position: relative;
  margin: 18px 0 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .breathe-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-cyan);
  padding-bottom: 2px;
  transition: border-color .2s ease, color .2s ease;
}

.page-contact .breathe-foot a:hover,
.page-contact .breathe-foot a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--cyan);
}

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

@media (min-width: 820px) {
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .contact-intro__media {
    margin-top: 8px;
  }

  .page-contact .prep-row {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 34px;
    align-items: start;
    padding: 24px 20px 24px 22px;
  }

  .page-contact .reply-steps {
    margin-top: 6px;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-contact .coop-cell__more {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .32s ease, opacity .32s ease, margin-top .32s ease;
  }

  .page-contact .coop-cell:hover .coop-cell__more,
  .page-contact .coop-cell:focus-visible .coop-cell__more,
  .page-contact .coop-cell:focus-within .coop-cell__more {
    max-height: 200px;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .prep-row,
  .page-contact .coop-cell,
  .page-contact .breathe-foot a {
    transition: none;
  }
}