.page-contact {
  --contact-panel: linear-gradient(158deg, rgba(23, 48, 107, .9) 0%, rgba(10, 23, 48, .96) 60%, rgba(6, 15, 38, .99) 100%);
  --contact-soft: linear-gradient(150deg, rgba(23, 48, 107, .62) 0%, rgba(6, 15, 38, .92) 100%);
  padding-bottom: clamp(48px, 8vw, 110px);
}

.page-contact .section {
  padding-block: clamp(38px, 6vw, 78px) 0;
}

.page-contact .contact-crumb {
  padding-top: clamp(16px, 2.6vw, 26px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  max-width: 18em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.2vw, 72px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--text);
  transform: skewX(-1deg);
  text-wrap: balance;
}

.page-contact .contact-hero__lede {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--text-soft);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

/* ---------- 章节标题组 ---------- */

.page-contact .contact-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 18px;
  align-items: start;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-contact .contact-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.2vw, 42px);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--text);
  text-wrap: balance;
}

.page-contact .contact-head p {
  margin: 10px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 01 联系渠道 ---------- */

.page-contact .channel-banner {
  position: relative;
  margin: 0 0 clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-850);
}

.page-contact .channel-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: .58;
  filter: saturate(.82) brightness(.86);
}

.page-contact .channel-banner figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 22px clamp(16px, 3vw, 28px) clamp(14px, 2vw, 20px);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-soft);
  background: linear-gradient(0deg, rgba(6, 15, 38, .94) 12%, rgba(6, 15, 38, 0) 100%);
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--contact-panel);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: border-color .34s var(--ease), transform .34s var(--ease), box-shadow .34s var(--ease);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  top: -46%;
  right: -34%;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 230, 200, .22), rgba(43, 230, 200, 0) 68%);
  opacity: 0;
  transition: opacity .44s var(--ease);
  pointer-events: none;
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: rgba(43, 230, 200, .72);
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
}

.page-contact .channel-card:hover::after,
.page-contact .channel-card:focus-within::after {
  opacity: 1;
}

.page-contact .channel-card__tag {
  align-self: flex-start;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(43, 230, 200, .34);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-contact .channel-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 23px);
  letter-spacing: -.01em;
  color: var(--text);
}

.page-contact .channel-card__value {
  margin: 0;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 18px);
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--text);
  word-break: break-word;
}

.page-contact .channel-card__value--addr {
  font-size: clamp(12.5px, 1.4vw, 14.5px);
  line-height: 1.8;
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-contact .channel-card .copy-btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 02 咨询事由 ---------- */

.page-contact .topic-list {
  display: grid;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .topic-item {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 2.8vw, 32px) 0;
  border-top: 1px solid var(--line);
}

.page-contact .topic-item__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-contact .topic-item__mark {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
  border: 1px solid rgba(43, 230, 200, .3);
  border-radius: 8px;
  padding: 3px 9px;
}

.page-contact .topic-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.1vw, 22px);
  letter-spacing: -.01em;
  color: var(--text);
}

.page-contact .topic-item__body p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-contact .topic-tips {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .topic-tips li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .topic-tips li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .58em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--cyan-deep);
  transform: rotate(45deg);
}

/* ---------- 03 邮件要素清单 ---------- */

.page-contact .brief-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .brief-item {
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(14, 31, 69, .5);
  transition: border-color .28s var(--ease), background .28s var(--ease);
}

.page-contact .brief-item:hover {
  border-color: rgba(43, 230, 200, .42);
  background: rgba(23, 48, 107, .55);
}

.page-contact .brief-item label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 15px clamp(16px, 2.2vw, 22px);
  cursor: pointer;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-soft);
}

.page-contact .brief-item input[type="checkbox"] {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  appearance: none;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--ink-900);
  cursor: pointer;
  transition: background .24s var(--ease), border-color .24s var(--ease);
}

.page-contact .brief-item input[type="checkbox"]:checked {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .brief-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid var(--ink-900);
  border-width: 0 2px 2px 0;
  transform: rotate(42deg);
}

.page-contact .brief-item input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .brief-note {
  margin: 18px 0 0;
  max-width: 42em;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 04 处理流程 ---------- */

.page-contact .flow-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.6vw, 46px);
  align-items: center;
}

.page-contact .flow-figure {
  margin: 0;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--contact-panel);
  box-shadow: var(--shadow-2);
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  opacity: .88;
}

.page-contact .flow-copy h2 {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--text);
  text-wrap: balance;
}

.page-contact .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.page-contact .flow-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 18px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .flow-steps li:first-child {
  border-top: 1px solid var(--line);
}

.page-contact .flow-steps__num {
  padding-top: .3em;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-contact .flow-steps strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  color: var(--text);
}

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

/* ---------- 05 回复时段 ---------- */

.page-contact .reply-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 18px);
}

.page-contact .reply-card {
  padding: clamp(22px, 2.8vw, 32px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--contact-soft);
}

.page-contact .reply-card--main {
  border-color: rgba(43, 230, 200, .32);
  background: linear-gradient(150deg, rgba(43, 230, 200, .15) 0%, rgba(14, 31, 69, .8) 52%, rgba(6, 15, 38, .95) 100%);
}

.page-contact .reply-window {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.4vw, 50px);
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-contact .reply-window__label {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--text-soft);
}

.page-contact .reply-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-contact .reply-card p {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-contact .reply-card--main p {
  margin-top: 16px;
  color: var(--text-soft);
}

/* ---------- 06 站点信息 ---------- */

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

.page-contact .site-facts > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 5px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .site-facts dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-contact .site-facts dd {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-contact .site-facts dd.num {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

/* ---------- 07 相关入口 ---------- */

.page-contact .next-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-contact .next-link {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 20px clamp(18px, 2.4vw, 24px);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--contact-soft);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16.5px;
  letter-spacing: -.01em;
  color: var(--text);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-contact .next-link span {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .next-link:hover,
.page-contact .next-link:focus-visible {
  border-color: rgba(43, 230, 200, .7);
  transform: translateY(-3px);
}

/* ---------- 平板 ---------- */

@media (min-width: 720px) {
  .page-contact .site-facts > div {
    grid-template-columns: 190px 1fr;
    align-items: baseline;
    gap: 26px;
  }
}

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

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

@media (min-width: 880px) {
  .page-contact .topic-item {
    grid-template-columns: minmax(180px, 250px) minmax(0, 1fr);
    align-items: start;
    gap: 0 clamp(22px, 3vw, 40px);
  }

  .page-contact .topic-item__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .page-contact .reply-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
    align-items: stretch;
  }

  .page-contact .flow-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .channel-card::after,
  .page-contact .brief-item,
  .page-contact .next-link {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within,
  .page-contact .next-link:hover,
  .page-contact .next-link:focus-visible {
    transform: none;
  }
}