.page-contact {
  position: relative;
  padding-bottom: clamp(56px, 8vw, 112px);
  overflow-x: clip;
}

.page-contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 560px;
  background:
    radial-gradient(ellipse at 72% -25%, rgba(199, 255, 61, .09), transparent 58%),
    radial-gradient(ellipse at 8% 4%, rgba(255, 78, 32, .07), transparent 45%);
  pointer-events: none;
}

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

.page-contact .contact-intro,
.page-contact .channel-block,
.page-contact .mail-block,
.page-contact .reply-block,
.page-contact .collab-block,
.page-contact .formal-block {
  margin-top: clamp(56px, 8vw, 120px);
}

.page-contact .contact-intro {
  margin-top: clamp(20px, 2.5vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-intro {
  display: grid;
  gap: clamp(28px, 4vw, 40px);
  align-items: end;
}

.page-contact .contact-intro .page-title {
  margin: 14px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(52px, 10vw, 132px);
  font-weight: 300;
  line-height: 0.92;
  letter-spacing: -0.035em;
  color: var(--cream);
}

.page-contact .contact-intro .page-lead {
  margin-top: clamp(18px, 2.4vw, 28px);
  max-width: 50ch;
  font-size: clamp(15.5px, 1.2vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .contact-intro-media {
  border: var(--bw) solid var(--lift);
  box-shadow: 10px 10px 0 rgba(255, 78, 32, 0.2);
}

.page-contact .contact-intro-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 980px) {
  .page-contact .contact-intro {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(40px, 6vw, 88px);
  }
}

/* ---------- 区块标题微调 ---------- */
.page-contact .section-note {
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 三条渠道 ---------- */
.page-contact .channel-grid {
  display: grid;
  gap: clamp(16px, 2vw, 22px);
  margin-top: clamp(26px, 3.5vw, 44px);
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 2.4vw, 30px);
  background: var(--deep);
  border: var(--bw) solid var(--lift);
  box-shadow: var(--shadow-neon);
  transition: transform 260ms var(--ease), border-color 260ms var(--ease), box-shadow 260ms var(--ease);
}

.page-contact .channel-card:hover {
  transform: translate(-3px, -3px);
  border-color: rgba(199, 255, 61, 0.5);
  box-shadow: 10px 10px 0 rgba(199, 255, 61, 0.14);
}

.page-contact .channel-card h3 {
  margin: 0;
  font-size: clamp(19px, 1.8vw, 24px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-contact .channel-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 1.5vw, 21px);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--neon);
  word-break: break-all;
  font-variant-numeric: tabular-nums;
}

.page-contact .channel-card.is-phone .channel-value {
  font-size: clamp(26px, 2.6vw, 36px);
  color: var(--flare);
  letter-spacing: 0.01em;
}

.page-contact .channel-card.is-address .channel-value {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.15vw, 16.5px);
  line-height: 1.7;
  letter-spacing: 0;
  color: var(--cream);
  word-break: normal;
}

.page-contact .channel-use {
  margin: 0;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--lift);
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-contact .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  align-self: flex-start;
}

.page-contact .copy-btn {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 8px 14px;
  background: transparent;
  color: var(--mist);
  border: 1px solid var(--lift);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  cursor: pointer;
  transition: color 200ms var(--ease), background-color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  color: var(--ink);
  background: var(--neon);
  border-color: var(--neon);
}

.page-contact .copy-btn:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-contact .copy-status {
  display: inline-block;
  min-height: 1em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--neon);
}

@media (min-width: 900px) {
  .page-contact .channel-grid {
    grid-template-columns: 1.32fr 1fr 1fr;
  }
}

/* ---------- 写信用法 ---------- */
.page-contact .mail-grid {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
  margin-top: clamp(26px, 3.5vw, 44px);
}

.page-contact .mail-copy p {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .mail-copy a,
.page-contact .reply-copy a,
.page-contact .collab-card a,
.page-contact .collab-note a,
.page-contact .formal-note a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 255, 61, 0.35);
  transition: border-color 200ms var(--ease);
}

.page-contact .mail-copy a:hover,
.page-contact .reply-copy a:hover,
.page-contact .collab-card a:hover,
.page-contact .collab-note a:hover,
.page-contact .formal-note a:hover {
  border-bottom-color: var(--neon);
}

.page-contact .mail-subtitle {
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: clamp(17px, 1.4vw, 19px);
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--cream);
}

.page-contact .mail-checklist {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  border-top: 2px solid var(--lift);
}

.page-contact .mail-checklist li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--lift);
  font-size: 15px;
  line-height: 1.65;
  color: var(--cream);
}

.page-contact .mail-checklist .num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--flare);
  padding-top: 3px;
}

.page-contact .mail-media {
  border: var(--bw) solid var(--lift);
  box-shadow: 8px 8px 0 rgba(199, 255, 61, 0.14);
}

.page-contact .mail-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-contact .mail-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

/* ---------- 回复节奏 ---------- */
.page-contact .reply-band {
  margin-top: clamp(26px, 3.5vw, 44px);
  padding: clamp(20px, 2.6vw, 32px);
  background: var(--deep);
  border: var(--bw) solid var(--lift);
  box-shadow: var(--shadow-flare);
}

.page-contact .reply-track {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2vw, 20px);
}

.page-contact .reply-track-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--sand);
  font-variant-numeric: tabular-nums;
}

.page-contact .reply-track-bar {
  position: relative;
  display: block;
  height: 10px;
  background: var(--lift);
  overflow: hidden;
}

.page-contact .reply-track-bar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--neon) 0%, var(--neon) 84%, var(--flare) 100%);
}

.page-contact .reply-track-note {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-contact .reply-copy {
  margin-top: clamp(24px, 3vw, 40px);
  max-width: 68ch;
}

.page-contact .reply-copy p {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

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

/* ---------- 合作协作 ---------- */
.page-contact .collab-grid {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
  margin-top: clamp(26px, 3.5vw, 44px);
}

.page-contact .collab-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.2vw, 28px);
  background: linear-gradient(180deg, rgba(22, 50, 38, 0.55), rgba(12, 33, 26, 0.2));
  border-top: 2px solid var(--neon);
  border-bottom: 1px solid var(--lift);
}

.page-contact .collab-card h3 {
  margin: 0;
  font-size: clamp(19px, 1.7vw, 23px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-contact .collab-card p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .collab-note {
  margin: clamp(24px, 3vw, 36px) 0 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

@media (min-width: 780px) {
  .page-contact .collab-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 地址与备案 ---------- */
.page-contact .formal-list {
  margin: clamp(26px, 3.5vw, 44px) 0 0;
  padding: 0;
  display: grid;
  border-top: 2px solid var(--neon);
}

.page-contact .formal-row {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2vw, 22px) 0;
  border-bottom: 1px solid var(--lift);
}

.page-contact .formal-row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-contact .formal-row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.65;
  color: var(--cream);
}

.page-contact .formal-row dd.is-num {
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.page-contact .formal-note {
  margin: clamp(20px, 2.5vw, 30px) 0 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-contact .formal-row {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .copy-btn,
  .page-contact .mail-copy a,
  .page-contact .reply-copy a,
  .page-contact .collab-card a,
  .page-contact .collab-note a,
  .page-contact .formal-note a {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
    box-shadow: var(--shadow-neon);
  }
}