/* ===== 联络与支持 / contact ===== */

.page-contact {
  --pc-accent: var(--cyan);
  color: var(--text);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-contact .pc-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(18px, 4vw, 36px) 0 clamp(22px, 4vw, 38px);
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -16%;
  width: min(70vw, 780px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 40% 40%,
      rgba(53, 224, 200, 0.20),
      rgba(124, 92, 255, 0.13) 46%,
      transparent 72%);
  z-index: -2;
  pointer-events: none;
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(28, 39, 64, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 39, 64, 0.5) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(circle at 74% 4%, #000 0%, transparent 60%);
  mask-image: radial-gradient(circle at 74% 4%, #000 0%, transparent 60%);
  opacity: 0.55;
  z-index: -1;
  pointer-events: none;
}

.page-contact .pc-hero__tag {
  margin: 22px 0 0;
  color: var(--cyan);
}

.page-contact .pc-hero__title {
  margin: 14px 0 18px;
  font-family: var(--font-narrow);
  font-weight: 200;
  font-size: clamp(38px, 9vw, 108px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.page-contact .pc-hero__title em {
  font-style: normal;
  color: var(--cyan);
  background: linear-gradient(180deg, transparent 62%, rgba(53, 224, 200, 0.16) 62%);
}

.page-contact .pc-hero__lede {
  max-width: 62ch;
  color: var(--muted);
}

.page-contact .pc-hero__media {
  margin: 30px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ---------- 页内索引 ---------- */

.page-contact .pc-jump {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(14, 21, 36, 0.9), rgba(7, 11, 20, 0.55));
}

.page-contact .pc-jump__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 12px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-contact .pc-jump__list a {
  display: inline-block;
  white-space: nowrap;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-contact .pc-jump__list a:hover,
.page-contact .pc-jump__list a:focus-visible {
  color: var(--text);
  border-color: rgba(53, 224, 200, 0.55);
  background: rgba(53, 224, 200, 0.08);
}

/* ---------- 章节基础 ---------- */

.page-contact .pc-section {
  padding-top: clamp(46px, 7.5vw, 88px);
}

.page-contact .pc-head {
  margin-bottom: clamp(20px, 3vw, 32px);
  max-width: 64ch;
}

.page-contact .pc-head .section-num {
  display: block;
  margin: 0 0 8px;
}

.page-contact .pc-head .section-title {
  margin: 0 0 10px;
}

.page-contact .pc-head .section-note {
  margin: 0;
}

/* ---------- 联络渠道卡 ---------- */

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

.page-contact .pc-channel {
  position: relative;
  padding: 26px 22px 24px 26px;
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.page-contact .pc-channel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--pc-accent);
  box-shadow: 0 0 18px -2px var(--pc-accent);
}

.page-contact .pc-channel--mail { --pc-accent: var(--cyan); }
.page-contact .pc-channel--phone { --pc-accent: var(--violet); }
.page-contact .pc-channel--addr { --pc-accent: var(--amber); }

.page-contact .pc-channel__badge {
  display: inline-block;
  margin-bottom: 14px;
}

.page-contact .pc-channel__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-contact .pc-channel__value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 4vw, 18px);
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--text);
  word-break: break-word;
}

.page-contact .pc-channel__value--addr {
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.7;
  letter-spacing: 0;
}

.page-contact .pc-channel .card__body {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 双栏：问题范围 + 时段信息 ---------- */

.page-contact .pc-split {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-contact .pc-topics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .pc-topic {
  position: relative;
  padding: 20px 20px 20px 58px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(14, 21, 36, 0.7);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-contact .pc-topic:hover {
  border-color: rgba(124, 92, 255, 0.55);
  background: rgba(18, 27, 46, 0.92);
}

.page-contact .pc-topic__no {
  position: absolute;
  left: 20px;
  top: 21px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--violet);
}

.page-contact .pc-topic__title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 600;
}

.page-contact .pc-topic__desc {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-contact .pc-aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-contact .pc-aside__card {
  padding: 22px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
}

.page-contact .pc-aside__card--time {
  border-color: rgba(255, 180, 84, 0.35);
  background: linear-gradient(160deg, rgba(255, 180, 84, 0.08), rgba(14, 21, 36, 0.9));
}

.page-contact .pc-aside__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .pc-aside__time {
  margin: 10px 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 5vw, 26px);
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-contact .pc-aside__text {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-contact .pc-prep {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .pc-prep li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text);
}

.page-contact .pc-prep li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .pc-prep__k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-contact .pc-aside__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ---------- 邮件沟通 ---------- */

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

.page-contact .pc-mail__panel {
  padding: 24px 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(14, 21, 36, 0.75);
}

.page-contact .pc-mail__sub {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.page-contact .pc-mail__code {
  margin: 0 0 12px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(53, 224, 200, 0.45);
  background: rgba(53, 224, 200, 0.07);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--cyan);
  overflow-x: auto;
  white-space: nowrap;
}

.page-contact .pc-mail__hint {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.78;
}

.page-contact .pc-mail__details {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .pc-mail__details summary {
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--violet);
}

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

.page-contact .pc-mail__details summary::after {
  content: " +";
  font-family: var(--font-mono);
}

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

.page-contact .pc-mail__steps {
  margin: 14px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-contact .pc-mail__steps li::marker {
  color: var(--violet);
  font-family: var(--font-mono);
}

.page-contact .pc-mail__cross {
  margin: 18px 0 0;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(201, 184, 255, 0.32);
  background: rgba(201, 184, 255, 0.07);
  color: var(--lilac);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-contact .pc-mail__cross .text-link {
  color: var(--lilac);
}

/* ---------- 站点基本信息 ---------- */

.page-contact .pc-facts {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-contact .pc-facts__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 5px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .pc-facts__row dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .pc-facts__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
  word-break: break-word;
}

.page-contact .pc-foot-note {
  margin: 24px 0 0;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--line);
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.9;
}

/* ---------- 逐行淡入 ---------- */

.page-contact [data-reveal] {
  animation: pc-fade-up .55s ease both;
  animation-delay: var(--reveal-delay, 0ms);
}

@keyframes pc-fade-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .pc-facts__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-contact .pc-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
  }

  .page-contact .pc-channels > :nth-child(2) {
    margin-top: 38px;
  }

  .page-contact .pc-channels > :nth-child(3) {
    margin-top: 16px;
  }

  .page-contact .pc-mail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 940px) {
  .page-contact .pc-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact [data-reveal] {
    animation: none;
  }
}
</main>